WO2008023556A1

WO2008023556A1 - Belts

Info

Publication number: WO2008023556A1
Application number: PCT/JP2007/065181
Authority: WO
Inventors: Keisuke Yoshida; Hiroyuki Tachibana; Yasuhiko Yoshida; Yuji Nakamoto
Original assignee: Bando Chemical Industries, Ltd.
Priority date: 2006-08-22
Filing date: 2007-08-02
Publication date: 2008-02-28
Also published as: JP2009270583A

Abstract

A drive belt which can show high dynamic properties over a longer period; and a belt, e.g., conveyor belt, which can show high dynamic properties over a longer period. The belts comprise a rubber material and a fibrous material, the fibrous material being bonded to the rubber material. They are characterized in that the fibrous material is constituted of at least one kind of fibers selected from the group consisting of polyester fibers, cotton fibers, polyamide fibers, vinylon fibers, polyketone fibers, poly(p-phenylene benzobisoxazole) fibers, polyethylene fibers, polyarylene fibers, polyether-ether-ketone fibers, glass fibers, and aramid fibers, and that the fibrous material was impregnated with a resorcinol/formalin/latex adhesive composition containing a latex ingredient at least 50 mass% of the solid matter of which was a 2-chloro-1,3-butadiene/2,3-dichloro-1,3-butadiene copolymer latex.

Description

Specification

Benole Pass

Technical field

The present invention relates to a belt such as a transmission belt and a conveyance belt.

Background art

[0002] Industrial belts such as transmission belts and conveyor belts are used under severe conditions such as high-speed rotation, high load, and high temperature.

[0003] For the transmission belt and the conveyor belt, generally, for example, an adhesive between a rubber material such as chloroprene rubber, a mixture of hydrogenated nitrile rubber and chlorosulfonated polyethylene rubber, and a fiber is used. . Examples of the adhesive include a rubber material and a canvas, for example, an RFL treatment liquid in which a vulcanization accelerator is added to a resorcin-formalin rubber latex liquid made of an ethylene-α-olefin rubber-gen copolymer rubber latex, and the like. Adhesives adhered by the above are known (see Patent Document 1). However, the belt using the adhesive described in Patent Document 1 has a drawback that it may be difficult to use for a long period of time.

Patent Document 1: Japanese Patent Application Laid-Open No. 2003-27376

Disclosure of the invention

Problems to be solved by the invention

[0004] The present invention has been made in view of the above-described conventional drawbacks, and an object of the present invention is to provide a belt that can exhibit high dynamic characteristics over a longer period of time.

Means for solving the problem

[0005] The present invention has been made in view of the above problems, and is a belt in which a rubber material and a fiber material are used, and the fiber material is used by being bonded to the rubber material. The fiber material is polyester fiber, cotton fiber, polyamide fiber, vinylon fiber, polyketone fiber, polyparaphenylene benzobisoxazole fiber, polyethylene fiber, polyarylate fiber, polyether ether 'ketone fiber, glass Fiber and aramid fiber, composed of at least one fiber selected from the group consisting of The material is impregnated with a resorcin formalin latex adhesive composition containing a latex component which is at least 50% by weight of the solid component ¾ chloro-1,3 butadiene 2,3-dichloro-1,3, -butadiene copolymer latex. It is related with the belt characterized by being made.

[0006] Further, as a preferable aspect of the belt, a transmission belt and a conveyance belt can be cited.

The invention's effect

[0007] According to the belt of the present invention, there is an excellent effect that high dynamic characteristics can be expressed over a longer period of time.

Brief Description of Drawings

[0008] FIG. 1 is a cross-sectional view of a V-ribbed belt as an example of a transmission belt.

FIG. 2 shows a cross-sectional view of a V belt which is an example of a transmission belt.

FIG. 3 shows a schematic diagram of a belt drive system for use in testing a transmission belt.

Yes

Explanation of symbols

[0009] 1 Top canvas layer

2 core wire

3 Adhesive rubber layer

4 Ribs

5 Compression rubber layer

6 Short fiber

7 Upper rubber layer

11 Drive pulley

12 Driven pulley

13 idler pulley

14 Tension pulley

BEST MODE FOR CARRYING OUT THE INVENTION

[0010] As a preferred embodiment of the belt that is effective in the present invention, first, a transmission belt will be described as an example. The transmission belt of the present embodiment includes a laminated body in which at least two types of rubber layers of an adhesive rubber layer in which a core wire, which is a fiber material, is embedded, and a compressed rubber layer are laminated, and an upper surface and a lower surface of the laminated body. Or a fabric material that is a fiber material bonded to the entire peripheral surface, and a fiber material strength of at least one of the core wire and the fabric material. Polyester fiber, cotton fiber, polyamide fiber, vinylon fiber, polyketone fiber, polyparaphenylene It is composed of at least one fiber selected from the group consisting of benzobisoxazole fiber, polyethylene fiber, polyarylate fiber, polyether 'ether' ketone fiber, glass fiber and polyamide fiber.

In addition, the fiber material composed of the above-mentioned fibers contains 2-chloro-1,3-butadiene-2,3-dichloro-1,3-butadiene copolymer latex, which is a component of strength and latex components. The resorcin formalin latex adhesive composition in which the content of the 2-chloro-1,3-butadiene-2,3-dichloro-1,3 butadiene copolymer latex in the solid component is at least 50% by mass is impregnated! / RU

In the present specification, the “power transmission belt” includes a V belt (V-ribbed belt, etc.), a flat belt, a toothed belt, and the like.

[0012] In the transmission belt of the present embodiment, the compressed rubber layer and the adhesive rubber layer form a laminated body. Such a laminate is laminated by rubber material force vulcanization bonding used for forming the compression rubber layer and the adhesive rubber layer, respectively. A core wire can be bonded and embedded in the adhesive rubber layer. A cloth material can be bonded to the entire surface including the upper surface, the lower surface, or the side surface of the laminate.

[0013] The transmission belt of the present embodiment includes at least one fiber material of the core wire and the cloth material, force S, polyester fiber, cotton fiber, polyamide fiber (for example, nylon (trade name) fiber), vinylon fiber, At least one fiber selected from the group consisting of polyketone fiber, polyparaphenylene benzobisoxazole fiber, polyethylene fiber, polyarylate fiber, polyether 'ether' ketone fiber, glass fiber and aramid fiber One major feature is that it consists of Therefore, according to the transmission belt of the present embodiment, the adhesion force between the fiber and the rubber material used for forming each of the compressed rubber layer and the adhesive rubber layer is increased. High durability And! /, Show an excellent effect.

[0014] In this embodiment, from the viewpoint of further improving the adhesion of the fiber material, it is formed of a rubber material including at least one force S of the compression rubber layer and the adhesive rubber layer, and ethylene _α -olefin rubber. It is preferable that In this way, a power transmission belt in which the core wire is vulcanized and bonded in an adhesive rubber layer made of an ethylene α-olefin rubber compound is highly effective! To demonstrate.

[0015] The rubber material containing the ethylene α-olefin rubber can be used in a solution state when forming a compression rubber layer and an adhesive rubber layer.

This solution can be prepared by dissolving ethylene α-olefin rubber with a suitable organic solvent.

[0016] The ethylene α-olefin rubber is not particularly limited. For example, rubber composed of a copolymer of _α- olefin other than ethylene, ethylene, and non-conjugated gene, and partially halogen-substituted products thereof. Or a mixture of two or more of these. More specifically, the a-olefin excluding ethylene is preferably, for example, propylene, butene, hexene, and the like from the viewpoint of sufficiently expressing the heat resistance and dynamic characteristics of the obtained transmission belt. At least one selected from the group consisting of otatens. The α-olefin, excluding force and ethylene, may be used alone or as a mixture of two or more. Among them, the ethylene α-olefin rubber is preferably ethylene propylene rubber, a partial halogen substitution thereof, particularly a partial chlorine substitution, or a mixture of two or more thereof.

[0017] In particular, in the present embodiment, the ethylene α-olefin rubber is preferably, for example, a copolymer of ethylene, propylene, and nonconjugated gen (ethylene propylene rubber) from the viewpoint of stably exhibiting physical properties. The iodine value of the elastomer is 50 or less, preferably 4 to 40, and the Mooney viscosity ML (100) is 20 to 1.

1 + 4

The amount of ethylene in the copolymer is 49 to 80% by mass, the amount of propylene is 19 to 50% by mass, and the remaining amount of non-conjugated diene is included.

[0018] The gen component is not particularly limited, and examples thereof include non-conjugated gens such as 1,4-monohexagen, dicyclopentagen, and ethylidene norbornene. [0019] For the rubber material containing the ethylene α-olefin rubber, fillers such as carbon black, silica, glass fibers and ceramic fibers, fillers such as calcium carbonate and talc, plasticizers, stable It may further contain various chemicals used in the normal rubber industry, such as agents, processing aids, and colorants. An ethylene α-olefin rubber compound for forming a compression rubber layer or an adhesive rubber layer is prepared by combining an ethylene α-olefin rubber with an agent such as that described above, as usual, such as a roll or a banbari. It can be obtained by mixing uniformly using a mixing means.

[0020] In the transmission belt of this embodiment, the fiber material of at least one of the core wire and the cloth material is polyester fiber, cotton fiber, polyamide fiber, vinylon fiber, polyketone fiber, polyparaphenylene resin. It is composed of at least one fiber selected from the group consisting of Nzobisoxazole fiber, polyethylene fiber, polyarylate fiber, polyether 'ether' ketone fiber, glass fiber and aramid fiber. Such fibers may be used alone or as a mixture of two or more. Specifically, the cloth material is not particularly limited, and examples thereof include a cloth material composed of a polyester cotton blended canvas. The core wire is not particularly limited, and examples thereof include a core wire made of polyester fiber (also referred to as a polyester core wire). Of these, polyethylene terephthalate fiber and polyethylene naphthalate fiber are preferable from the viewpoint of obtaining sufficient strength for use.

[0021] Further, in the transmission belt of the present embodiment, the fiber material of at least one of the core wire and the cloth material includes 2 chloro-1,3 butadiene 2,3 dichloro-1,3 butadiene copolymer latex as a latex component. Another major characteristic is that it is impregnated with the contained resorcin formalin latex adhesive composition (hereinafter also referred to as “RFL adhesive composition”). Therefore, in the transmission belt of the present embodiment, an excellent effect that at least one of the fiber material of the core wire and the cloth material is in a state suitable for improving adhesiveness with the compression rubber layer and the adhesive rubber layer. Demonstrate.

[0022] Further, in the transmission belt of the present embodiment, since at least one of the core wire and the fabric material is composed of the fiber and impregnated with the RFL adhesive composition, Between the core wire and the cloth material and the compressed rubber layer and the adhesive rubber layer Can exhibit high adhesive strength. Thereby, according to the transmission belt of this embodiment, the high dynamic characteristic is expressed and the outstanding effect of achieving a longer lifetime is exhibited.

[0023] The RFL adhesive composition used in the power transmission belt of the present embodiment is composed of 2-chloro-1,3-butadiene-2,3-dichloro-1,3-butadiene copolymer latex and a latex component of the RFL adhesive composition. among the solid components in, from the viewpoint of obtaining a sufficient adhesiveness, least 50 mass ^_0/0, preferably, is preferable those containing more than 60 wt%. Here, although the density | concentration of the solid component in the latex component in the said RFL adhesive composition is not specifically limited, Usually, it is the range of 10-50 mass%.

[0024] The RFL adhesive composition may be prepared by, for example, condensing resorcin and formalin in the presence of a basic catalyst such that resorcin / formalin (molar ratio) is 1/3 to 3/1. It can be prepared by preparing an aqueous solution containing ~ 80 mass% resorcin formalin resin (resorcin formalin initial condensate, hereinafter referred to as “RF”), and then mixing the aqueous solution with rubber latex.

[0025] The RFL adhesive composition may contain a condensate of a chlorophenol compound.

[0026] The RFL adhesive composition may further contain a metal oxide that functions as a crosslinking agent and a sulfur-containing vulcanization accelerator. When the transmission belt of this embodiment has a core wire and a fabric material impregnated with an RFL adhesive composition containing a metal oxide and a sulfur-containing vulcanization accelerator, the core wire and the rubber of the adhesive rubber layer It exhibits an excellent effect of further improving dynamic bonding with the material. Further, when the transmission belt of the present embodiment is manufactured, when the RFL adhesive composition containing the metal oxide and the sulfur-containing vulcanization accelerator is impregnated into, for example, a polyester core wire, the core after the impregnation is used. By heating and drying the wire to a temperature exceeding 200 ° C, the dynamic bonding between the polyester core and the adhesive rubber is further enhanced, and the time required for the bonding process of the polyester core is shortened. It has an excellent effect of being able to

[0027] The metal oxide is not particularly limited, and examples thereof include zinc oxide, magnesium oxide, lead oxide, and a mixture of two or more thereof. Among the metal oxides Then, from the viewpoint of obtaining sufficient reactivity and adhesion, zinc oxide is preferable. The blending ratio of the metal oxide in the RFL adhesive composition is preferably in the range of 0.;! To 10 parts by mass with respect to 100 parts by mass of the solid component of the latex component in the RFL adhesive composition. .

[0028] In addition, the sulfur-containing vulcanization accelerator is not particularly limited! /, For example, a thiazonole compound, a sulfenamide compound, a thiuram compound, a dithiorubamate, and a mixture of two or more of these Etc. The thiazole compound is not particularly limited, and examples thereof include 2-mercaptobenzothiazole or a salt thereof (for example, zinc salt, sodium salt, cyclohexylamine salt, etc.), dibenzothiazyl disulfide, and the like. . The sulfenamide compound is not particularly limited, and examples thereof include N cyclohexyl 2-benzothiazylsulfenamide. The thiuram compound is not particularly limited, and examples thereof include tetramethylthiuram monosulfide and tetra. The dithiopower rubamate compound is not particularly limited, and examples thereof include sodium di-n-butyldithiocanolebamate, zinc dimethyldithiocanolebamate, and zinc diethyldithiocarbamate. The blending ratio of the sulfur-containing vulcanization accelerator to the RFL adhesive composition is in the range of 0.;! To 20 parts by mass with respect to 100 parts by mass of the solid component in the latex component of the RFL adhesive composition. It is desirable.

[0029] The transmission belt of the present embodiment is manufactured by, for example, an RFL adhesive containing, as a latex component, the 2-chloro-1,3 butadiene 2,3 dichloro-1,3 butadiene copolymer latex in the core wire. The core wire is impregnated with the composition and sandwiched between unvulcanized rubber sheets forming an adhesive rubber layer, and the obtained product is stacked with an unvulcanized rubber sheet forming a compressed rubber layer, and heated. This can be done by pressing and vulcanizing as a unit.

[0030] The core wire is impregnated with the RFL adhesive composition, for example, by immersing the core wire in the RFL adhesive composition, and then at a temperature of 200 to 240 ° C, preferably 210 to 235 ° C. This can be done by heating (baking) and drying to fix the RFL adhesive composition to the core.

[0031] When impregnating the core wire with the RFL adhesive composition, for example, at least two series of steps consisting of immersion of the core wire in the RFL adhesive composition and drying treatment of the core wire are performed. It may be performed once. Specifically, for example, the first RFL treatment is performed by dipping the core wire in the first RFL adhesive composition and drying by heating, and then dipping in the second RFL adhesive composition. The core wire can be impregnated with the RFL adhesive composition by performing the second RFL treatment by heating and drying. In such a case, the first RFL adhesive composition and the second RFL adhesive composition may be the same or different from each other. In addition, if necessary, a series of steps including the immersion of the core wire in the RFL adhesive composition and the drying treatment of the core wire may be performed three times or more! /.

[0032] The RFL adhesive composition used in the manufacture of the transmission belt of this embodiment may contain other latexes in addition to 2-chloro-1,3 butadiene 2,3 dichloro-1,3 butadiene copolymer latex. . As the other latex, chlorosulfonated polyethylene latex is preferable.

[0033] In manufacturing the transmission belt of the present embodiment, prior to impregnating the core wire, for example, a polyester core wire, with the RFL adhesive composition, the core wire may be treated with isocyanate or epoxy. . That is, a core wire, for example, a polyester core wire, is immersed in a solution containing an isocyanate compound or an epoxy compound, and then heated and dried as necessary to pretreat the core wire. You may do it.

[0034] The isocyanate compound is not particularly limited, and examples thereof include tolylene diisocyanate, m-phenylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, and polymethylene polyphenyl. Polyisocyanate and the like are preferably used. In addition, a polyhydric alcohol-added polyisocyanate obtained by reacting such an isocyanate compound with a compound having two or more active hydrogens in the molecule such as trimethylolpropane or pentaerythritol, or the above isocyanate compound. A blocked polyisocyanate obtained by reacting a phenol compound, a tertiary alcohol compound, a secondary amine compound or the like with a blocking agent to block the inocyanate group of the isocyanate compound can also be preferably used as the isocyanate compound.

[0035] The epoxy compound is not particularly limited as long as it is a polyepoxy compound having two or more epoxy groups in the molecule. For example, polyhydric alcohols such as ethylene glycol, glycerin, sonorebitol, pentaerythritol, Polyethylene glycol Reaction products of polyalkylene glycols such as e-chlorohydrin and other halogen-containing epoxy compounds; polyvalents such as resorcin, bis (4-hydroxyphenyl) dimethylethane, phenol formaldehyde resin, resorcin formaldehyde resin A reaction product of a phenol compound or a phenol resin and a halogen-containing epoxy compound such as epichlorohydrin is preferable.

The solvent for forming the isocyanate compound solution or the epoxy compound solution is not particularly limited, and water or an appropriately selected organic solvent is used depending on the isocyanate compound and the epoxy compound to be used. In addition, since the isocyanate compound is chemically very active, a compound obtained by blocking the isocyanate group of the isocyanate compound with a phenol compound or the like, which is usually used as a non-aqueous solution, may be used as an aqueous solution. Can be used. Examples of the organic solvent include, but are not limited to, aromatic hydrocarbons such as benzene, xylene, and toluene; aliphatic ketones such as methyl ethyl ketone and methyl isoptyl ketone; and aliphatic carboxyls such as ethyl acetate and amyl acetate. Examples include acid alkyl esters. The concentration of the isocyanate compound or the epoxy compound in the solution of the isocyanate compound or the epoxy compound in the solution of the isocyanate compound is in the range of 5 to 50% by mass from the viewpoint of exhibiting sufficient adhesiveness.

[0037] Furthermore, when manufacturing the transmission belt of this embodiment, a core wire, for example, a polyester core wire, may be treated with an RFL adhesive composition, and then the core wire may be treated with a rubber paste. As the rubber paste, a rubber material for forming a compression rubber layer and an adhesive rubber layer, for example, a solution obtained by dissolving ethylene _α -olefin rubber in an appropriate organic solvent (containing the ethylene α-olefin rubber) Etc.). In this case, the core wire may be dipped in the solution and then dried by heating.

[0038] Hereinafter, an embodiment of the transmission belt of the present embodiment will be described with reference to the drawings. However, the present invention is not limited in any way by the force or drawing.

FIG. 1 shows a cross-sectional view of an example of a transmission belt (V-ribbed belt) of the present embodiment. The V-ribbed belt shown in FIG. 1 includes an adhesive rubber layer 3 having a rubber composition as a constituent member, an upper canvas layer 1 disposed on the upper surface side of the adhesive rubber layer 3, and a lower surface side of the adhesive rubber layer 3. Compression arranged in The upper surface canvas layer 1, the adhesive rubber layer 3, and the compression rubber layer 5 are integrally formed. The upper canvas layer 1 is formed of a single layer or multiple layers of rubberized canvas 1, and an adhesive rubber layer 3 is laminated adjacently. In the adhesive rubber layer, for example, a plurality of low-stretch cores 2 made of polyester fibers are embedded so as to extend in the longitudinal direction of the belt at intervals. Further, a compressed rubber layer 5 is laminated adjacent to the adhesive rubber layer. The compressed rubber layer has rib portions 4 that are spaced from each other so as to extend in the longitudinal direction of the belt.

[0040] On the bottom surface side of the compressed rubber layer 5, three rib portions 4 provided so as to extend in the belt length direction are formed at a predetermined pitch in the belt width direction. Further, in the central region of the adhesive rubber layer 3 in the belt thickness direction, a plurality of cords 2 extending in a substantially belt length direction and spirally provided with a predetermined pitch in the belt width direction are fixed. It is buried at intervals. In many cases, short fibers 6 may be oriented and dispersed in the compressed rubber layer 5 in order to enhance the lateral pressure resistance. Examples of the short fibers include, but are not limited to, polyamide fiber giron (trade name) fiber, aramid fiber, cotton, vinylon fiber, and the like.

If necessary, it is also possible to use the short fiber which is a fiber material impregnated with the RFL adhesive composition.

By using short fibers impregnated with the RFL adhesive composition, high dynamic characteristics over a longer period can be developed in the transmission belt.

[0041] Further, the transmission belt of the present embodiment can be manufactured as follows, for example, in the case of a V-ribbed belt. That is, one or more rubber-coated canvases and an unvulcanized rubber sheet for the adhesive rubber layer are wrapped around the peripheral surface of a cylindrical molding drum with a smooth surface, and a polyester core wire is spirally wound. In addition, an unvulcanized rubber sheet for the adhesive rubber layer is wound thereon, and then an unvulcanized rubber sheet for the compressed rubber layer is wound into a laminated body, and this is placed in a vulcanized can. And pressurize and vulcanize to obtain an annular product. Next, the annular material is stretched between a driving roll and a driven roll, and while running under a predetermined tension, a plurality of ribs are formed on the surface by a grinding wheel. After that, this annular object is further laid between another drive roll and a driven roll to travel to a predetermined width. If it is cut, a V-ribbed belt as a product can be obtained.

FIG. 2 shows a cross-sectional view of an example of the V-belt. The upper surface of the V-belt shown in FIG. 2 is formed of a single layer or multiple layers of rubberized canvas, as described above, and an upper rubber layer 7 is laminated as necessary. Similar to the above, the adhesive rubber layer 3 in which the core wire 2 is embedded is laminated, and further, the compressed rubber layer 5 is laminated adjacent thereto. In many cases, short fibers 6 are oriented and dispersed in the width direction of the belt in the compressed rubber layer 5 in order to increase the side pressure resistance. The compressed rubber layer is usually covered with a single layer or multiple layers of rubberized canvas 1.

[0043] In another aspect, the present invention provides polyester fibers, cotton fibers, polyamide fibers, vinylon fibers, polyketone fibers, polyparaphenylene benzobisoxazole fibers, polyethylene fibers, polyarylate fibers, polyethers. Consists of at least one fiber selected from the group consisting of 'ether' ketone fiber, glass fiber, and polyamide fiber, and latex of 2-chloro-1,3 butadiene 2,3 dichloro-1,3 butadiene copolymer latex The present invention relates to a conveyor belt reinforced with a fiber material impregnated with a resorcin formalin latex adhesive composition contained as a component.

[0044] Since the transport belt of the present embodiment is reinforced by the fiber material, it exhibits an excellent effect of exhibiting high dynamic characteristics over a longer period of time. In addition, the transport belt of this embodiment exhibits excellent durability.

[0045] Examples of the conveyor belt of the present embodiment include a conveyor belt reinforced by laminating a rubber layer and the fiber material.

For example, in a conveyor belt formed in the shape of a flat belt as a whole, cloth material (hereinafter also referred to as “heart canvas”) on both the upper surface side on which the object is placed and the lower surface side on the opposite side. Can be used to illustrate the power!

That is, by exemplifying a conveyor belt in which a core canvas is bonded to the rubber layer by stacking the core canvas on the upper and lower sides of the rubber layer forming the central portion in the thickness direction. .

In addition, a core wire (hereinafter also referred to as “heart cord”) extending in the belt length direction and arranged with a predetermined pitch in the belt width direction is provided in the central region in the thickness direction. Conveyor belt The ability to show the ί row is S.

That is, the rubber layer is laminated so as to sandwich the core cord located in the central portion in the thickness direction from above and below, thereby illustrating the conveyance belt in which the core cord is bonded and embedded in the rubber layer. Touch with S.

[0047] In the transport belt of the present embodiment, it is preferable that the rubber layer is formed of a rubber material containing ethylene α-olefin rubber from the viewpoint of further improving the adhesion of the fiber material.

[0048] The rubber material containing the ethylene α-olefin rubber can be used in a solution state when the rubber layer is formed.

[0049] The ethylene α-olefin rubber is not particularly limited. For example, rubber made from a copolymer of _α- olefin other than ethylene, ethylene, and non-conjugated gene, and partially halogen-substituted products thereof. Or a mixture of two or more of these. More specifically, the a-olefin excluding ethylene is preferably, for example, propylene, butene, hexene, and the like from the viewpoint of sufficiently expressing the heat resistance and dynamic characteristics of the resulting transport belt. At least one selected from the group consisting of otatens. The α-olefin, excluding force and ethylene, may be used alone or as a mixture of two or more. Among them, the ethylene α-olefin rubber is preferably ethylene propylene rubber, a partial halogen substitution thereof, particularly a partial chlorine substitution, or a mixture of two or more thereof.

[0050] In particular, in the present embodiment, the ethylene α-olefin rubber is preferably, for example, a copolymer of ethylene, propylene, and non-conjugated diene (ethylene propylene rubber) from the viewpoint of stably exhibiting physical properties. The iodine value of the elastomer is 50 or less, preferably 4 to 40, and the Mooney viscosity ML (100) is 20 to 1.

1 + 4

[0051] The gen component is not particularly limited. For example, 1, 4 monohexagen, di- Non-conjugated gens such as cyclopentagen and ethylidene norbornene.

[0052] For the rubber material containing the ethylene α-olefin rubber, fillers such as carbon black, silica, glass fiber, and ceramic fiber, fillers such as calcium carbonate and talc, plasticizers, and stabilizers are used as necessary. It may further contain various chemicals used in the normal rubber industry, such as agents, processing aids, and colorants. An ethylene α-olefin rubber compound for forming a compression rubber layer or an adhesive rubber layer is prepared by combining an ethylene α-olefin rubber with an agent such as that described above, as usual, such as a roll or a banbari. It can be obtained by mixing uniformly using a mixing means.

[0053] In the conveyor belt of the present embodiment, at least one of the fiber cords and the canvas of the core body is made of polyester fiber, cotton fiber, polyamide fiber, vinylon fiber, polyketone fiber, Polyparaphenylene benzobisoxazole fiber, polyethylene fiber, polyarylate fiber, polyether ether 'ketone fiber, glass fiber and aramid fiber, composed of at least one fiber selected from the group consisting of . Such fibers may be used alone or as a mixture of two or more. Specifically, the material of the core canvas is not particularly limited, and examples thereof include polyester cotton blended canvas. The core cord is not particularly limited, and examples thereof include a heart cord made of aramid fibers (hereinafter also referred to as “aramide cord”).

[0054] Further, in the conveyance belt of the present embodiment, at least one of the core cord and the canvas of the core body is made of 2 chloro-1,3 butadiene 2,3 dichloro-1,3 butadiene copolymer. Another major feature is that it is impregnated with a resorcin-formalin latex adhesive composition (hereinafter also referred to as “RFL adhesive composition”) containing latex as a latex component. Therefore, in the conveyance belt of this embodiment, the excellent effect that the fiber material force S of at least one of the core body cord and the core body canvas and the adhesiveness with the rubber layer are improved is exhibited.

[0055] Further, in the transport belt of the present embodiment, at least one fiber material of the core cord and the core canvas is composed of the fibers and impregnated with the RFL adhesive composition. Therefore, a high adhesive force can be expressed between the core cord and the core canvas and the rubber layer. Thereby, according to the conveyor belt of this embodiment, high V, dynamic characteristics are manifested, and when it has a longer life, it has excellent effects.

[0056] The RFL adhesive composition used for the conveyor belt of the present embodiment comprises 2 chloro-1,3-butadiene 2,3 dichloro-1,3 butadiene copolymer latex in the latex component of the RFL adhesive composition. of solid components, from the viewpoint of obtaining a sufficient adhesiveness, least 50 mass ^_0/0, preferably, is preferable those containing more than 60 wt%. Here, although the density | concentration of the solid component in the latex component in the said RFL adhesive composition is not specifically limited, Usually, it is the range of 10-50 mass%.

[0057] The RFL adhesive composition may be prepared by, for example, condensing resorcin and formalin in the presence of a basic catalyst so that resorcin / formalin (molar ratio) is 1/3 to 3/1. It can be prepared by preparing an aqueous solution containing ~ 80 mass% resorcin formalin resin (resorcin formalin initial condensate, hereinafter referred to as “RF”), and then mixing the aqueous solution with rubber latex.

[0058] Further, the RFL adhesive composition may contain a chlorophenol compound condensate or the like.

[0059] The RFL adhesive composition may further contain a metal oxide that functions as a crosslinking agent and a sulfur-containing vulcanization accelerator. When the conveyor belt of the present embodiment has a core cord and a core canvas impregnated with an RFL adhesive composition containing a metal oxide and a sulfur-containing vulcanization accelerator, the core cord or core The dynamic adhesion between the canvas and the rubber layer is effective. Further, when the RFL adhesive composition containing the metal oxide and the sulfur-containing vulcanization accelerator is impregnated, for example, when the aramid cord is impregnated at the time of manufacturing the conveyor belt of the present embodiment, the aramid cord after impregnation is used. By heating to a temperature exceeding ° C and drying, dynamic bonding between the aramid cord and the rubber layer can be further enhanced, and the time for the bonding treatment of the aramid cord can be shortened.

V, show excellent effect.

[0060] The metal oxide is not particularly limited, and examples thereof include zinc oxide, magnesium oxide, lead oxide, and a mixture of two or more thereof. Among the metal oxides, zinc oxide is preferable from the viewpoint of obtaining sufficient reactivity and adhesion. The blending ratio of the metal oxide in the RFL adhesive composition is the same as that in the RFL adhesive composition. It is desirable that the amount is in the range of 0.

[0061] Further, the sulfur-containing vulcanization accelerator is not particularly limited! /, But, for example, a thiazonole compound, a sulfenamide compound, a thiuram compound, a dithiorubamate, and a mixture of two or more of these Etc. The thiazole compound is not particularly limited, and examples thereof include 2-mercaptobenzothiazole or a salt thereof (for example, zinc salt, sodium salt, cyclohexylamine salt, etc.), dibenzothiazyl disulfide, and the like. . The sulfenamide compound is not particularly limited, and examples thereof include N cyclohexyl 2-benzothiazylsulfenamide. The thiuram compound is not particularly limited, and examples thereof include tetramethylthiuram monosulfide and tetra. The dithiopower rubamate compound is not particularly limited, and examples thereof include sodium di-n-butyldithiocanolebamate, zinc dimethyldithiocanolebamate, and zinc diethyldithiocarbamate. The blending ratio of the sulfur-containing vulcanization accelerator to the RFL adhesive composition is in the range of 0.;! To 20 parts by mass with respect to 100 parts by mass of the solid component in the latex component of the RFL adhesive composition. It is desirable.

[0062] The conveyor belt of the present embodiment is manufactured by, for example, an RFL adhesive composition containing, as a latex component, the 2 chloro-1,3 butadiene 2,3 dichloro-1,3 butadiene copolymer latex in a core cord. The core cord is impregnated with an object, and the core cord is sandwiched between unvulcanized rubber sheets forming a rubber layer, and the resulting product is heated and pressurized to vulcanize as a unit.

[0063] The core body cord is impregnated with the RFL adhesive composition, for example, the core body cord is soaked in the RFL-bonded homogeneous IJ yarn and the composition, and then 200-240. C, preferably 210-235. It can be made by heating (baking) to the temperature of C, drying and fixing the RFL adhesive composition to the core cord.

[0064] When impregnating the core body cord with the RFL adhesive composition, for example, there are few series of steps consisting of immersion of the core body cord in the RFL adhesive composition and drying treatment of the core wire. Both may be done twice. Specifically, for example, the heart body cord is connected to the first RFL adhesive group. The first RFL treatment is performed by dipping in the composition and heat drying, and then the second RFL treatment is performed by dipping in the second RFL adhesive composition and heat drying. The core body cord can be impregnated with the RFL adhesive composition. In such a case, the first RFL adhesive composition and the second RFL adhesive composition may be the same as or different from each other. If necessary, a series of steps comprising immersing the core cord in the RFL adhesive composition and drying the core cord may be performed three or more times.

[0065] The RFL adhesive composition used in the production of the conveyor belt of this embodiment may contain other latexes in addition to the 2 chloro-1,3 butadiene 2,3 dichloro-1,3 butadiene copolymer latex. As the other latex, chlorosulfonated polyethylene latex is preferable.

[0066] In manufacturing the transport belt of the present embodiment, the core wire may be subjected to an isocyanate treatment or an epoxy treatment prior to impregnation of the core body cord, for example, the aramid cord, with the RFL adhesive composition. That is, after immersing a core cord, for example, aramid cord, in a solution containing an isocyanate compound or a solution containing an epoxy compound, the core cord is preliminarily formed by heating and drying as necessary. Processing may be performed

[0067] The isocyanate compound is not particularly limited, and examples thereof include tolylene diisocyanate, m-phenylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, and polymethylene polyphenyl. Polyisocyanate and the like are preferably used. In addition, a polyhydric alcohol-added polyisocyanate obtained by reacting such an isocyanate compound with a compound having two or more active hydrogens in the molecule such as trimethylolpropane or pentaerythritol, or the above isocyanate compound. A blocked polyisocyanate obtained by reacting a phenol compound, a tertiary alcohol compound, a secondary amine compound or the like with a blocking agent to block the inocyanate group of the isocyanate compound can also be preferably used as the isocyanate compound.

[0068] The epoxy compound is not particularly limited as long as it is a polyepoxy compound having two or more epoxy groups in the molecule. For example, polyhydric alcohols such as ethylene glycol, glycerin, sonolebithonole, pentaerythritol, Polyethylene glycol Products of polyalkylene glycols such as epoxychlorohydrin and other halogen-containing epoxy compounds; polyvalents such as resorcin, bis (4-hydroxyphenyl) dimethylethane, phenol formaldehyde resin, resorcin formaldehyde resin A reaction product of a phenol compound or a phenol resin and a halogen-containing epoxy compound such as epichlorohydrin is preferable.

[0069] The solvent for forming the isocyanate compound solution or the epoxy compound solution is not particularly limited, and water or an appropriately selected organic solvent is used depending on the isocyanate compound and the epoxy compound to be used. In addition, since the isocyanate compound is chemically very active, a compound obtained by blocking the isocyanate group of the isocyanate compound with a phenol compound or the like, which is usually used as a non-aqueous solution, may be used as an aqueous solution. Can be used. Examples of the organic solvent include, but are not limited to, aromatic hydrocarbons such as benzene, xylene, and toluene; aliphatic ketones such as methyl ethyl ketone and methyl isoptyl ketone; and aliphatic carboxyls such as ethyl acetate and amyl acetate. Examples include acid alkyl esters. The concentration of the isocyanate compound or the epoxy compound in the solution of the isocyanate compound or the epoxy compound in the solution of the isocyanate compound is in the range of 5 to 50% by mass from the viewpoint of exhibiting sufficient adhesiveness.

[0070] Further, when manufacturing the conveyance belt of the present embodiment, the core body cord, for example, aramid cord, may be treated with the RFL adhesive composition, and then the core body cord may be treated with rubber paste. . Examples of the rubber paste include rubber materials for forming a rubber layer, for example, a solution obtained by dissolving ethylene α-olefin rubber in an appropriate organic solvent (the ethylene a-olefin rubber compound). In this case, the core body cord is immersed in the solution and then dried by heating! /.

[0071] In the present specification, the term "conveying belt" refers to a belt that conveys a lightweight conveyed object of several kg or less, a belt that conveys heavy objects such as ore, earth and sand, cement, a sharply inclined conveyor belt, and a pipe. Use it for the purpose of including a conveyor belt, a person conveyor belt (passenger belt), etc.

Hereinafter, the present invention will be described in detail with reference to examples and the like, but the present invention is not limited to such examples. It is not specified.

Example 1

[0073] (Production Example 1)

(1) Preparation of composition for adhesive rubber layer

Ethylene-propylene-gen rubber (composition: ethylene 56% by mass, propylene 36.1% by mass, ethylidene norbornene 5.5% by mass, dicyclopentagen 2.4% by mass, Mooney viscosity ML (100 ° C) = 60 ] For 100 parts by mass, HAF carbon (Mitsubishi

1 + 4

50 parts by mass, 20 parts by mass of silica [manufactured by Tokuyama Co., Ltd., trade name: Toxeal Gu], and 20 parts by mass of paraffin oil [manufactured by Nippon Sun Chemical Co., Ltd., trade name: Sunflex 22 80] , 3 parts by mass of a vulcanizing agent (manufactured by Hosoi Chemical Co., Ltd., oil sulfur) and a vulcanization accelerator (manufactured by Ouchi Shinsei Chemical Co., Ltd., trade name: EP-150, dibenzothiasulfide and tetramethylthiuramdis Mixture of rufide and zinc jetyldithiocarbamate] 2.5 parts by mass, vulcanization aid (manufactured by Kao Corporation, stearic acid) 1 part by mass, vulcanization aid (manufactured by Sakai Chemical Industry Co., Ltd., Zinc oxide] 5 parts by mass and an anti-aging agent (made by Ouchi Shinsei Chemical Co., Ltd., trade name: 224, 2, 2, 4-trimethylenole 1,2-dihydroquinoline) 2 parts by mass, anti-aging agent [ Product name: MB, 2-Mercaptoben, manufactured by Ouchi Shinsei Chemical Co., Ltd. 1 part by weight of Tizimidazole] and tackifier [made by Nippon Zeon Co., Ltd., trade name: Petroleum Resin Quinton A-10 0] 5 parts by weight and 2 parts by weight of short fibers (cotton powder) A composition was obtained.

[0074] (2) Preparation of composition for compressed rubber layer

1 + 4

70 parts by weight, paraffin oil (manufactured by Sun Chemical Co., Ltd., trade name: Sunflex 2280) and 20 parts by weight of vulcanizing agent (manufactured by Hosoi Chemical Co., Ltd., oil sulfur) And vulcanization accelerator (Ouchi Shinsei Chemical Co., Ltd., trade name: EP-150, mixture of diben lead) 2. 8 parts by mass and vulcanization accelerator [Ouchi Shinsei Chemical Co., Ltd. trade name : M Vulcanizing aid (manufactured by Kao Corporation, stearic acid) 1 part by mass, vulcanizing aid (manufactured by Sakai Chemical Industry Co., Ltd., zinc oxide) 5 parts by mass and anti-aging agent Name: 224, 2, 2, 4 Trimethylolene 1, 2 Dihydroquinoline] 2 parts by weight, anti-aging wrinkle prevention IJ [Ouchi Shinsei Chemical Co., Ltd., trade name: MB4] 1 part by weight and short fiber [Products] Name: 66 nylon (trade name) fiber, 6 de X lmm] 22 parts by mass were blended to obtain a composition for a compressed rubber layer.

[0075] (Example 1)

(1) Preparation of RFL adhesive composition

Resorcin, formalin (concentration at 37% by mass), sodium hydroxide, and water are mixed in a mass ratio of 5.6: 6.0: 0.6: 115.6, and resorcin.formalin resin (resorcin formalin) An initial condensate) (also referred to as RF) aqueous solution a was obtained. Specifically, resorcin and formalin (concentration at 37% by mass) are mixed and stirred, and an aqueous sodium hydroxide solution is added to the resulting mixture, stirred, and water is further added. After aging for 2 hours, an RF aqueous solution a having a solid component concentration of 6.57% by mass was obtained.

[0076] Next, the obtained RF aqueous solution a and 2 chloro-1,3-butadiene-2,3-dichloro-

1,3 Butadiene copolymer (DCB) latex (manufactured by Tosoichi Co., Ltd., trade name: LH430, solid component: 32% by mass), sodium dioctylsulfosuccinate and water in a mass ratio of 8.4 : 50.4 (solid component): 5.0: 239, and resorcin formalin Tex (RFU adhesive composition A having the composition shown in Table 1 was obtained. Specifically, the RF aqueous solution a And 2 chloro-1,3 butadiene 2,3 dichloro-1,3 butadiene copolymer (D CB) latex, and the resulting mixture is aged for 24 hours. Dioctyl sulfosuccinate and water were added to obtain RFL adhesive composition A.

[0077] (2) Preparation of sample for peel test (belt)

Untreated polyester cotton canvas [(characteristic when processed to wide angle) Yarn material: polyester and cotton blended canvas; mass ratio of polyester to cotton 50: 50; Yarn composition Warp: 20 S / 2 ( Meaning of 20 stitches from 2 pieces), weft: 20 S / 2 (meaning 20 pieces from 2 pieces); Number of twists: warp S twist 59 times / 10 cm, weft: 59 times / 10 cm; Weaving method: Processing plain weave so that the crossing angle force between warp and weft is 120 ° (90 ° is acceptable); Density warp: 85/5111, weft: 85/5111] were dipped in the RFL adhesive composition A, and then heat-dried at 150 ° C. for 3 minutes. The obtained polyester cotton canvas was immersed in an adhesive solution [the same ethylene propylene rubber dissolved in toluene as used in the adhesive rubber layer composition]. Thereafter, the obtained polyester cotton canvas was heat-dried at 60 ° C. for 10 minutes to obtain an adhesion-treated polyester cotton canvas.

[0078] On the unvulcanized rubber sheet having a thickness of 5 mm composed of the composition for the adhesive rubber layer, an adhesive-treated polyester cotton canvas is arranged, and a pressure of 0.2 MPa is applied to the obtained product with a press machine. At 160 ° C for 30 minutes, vulcanization was carried out to obtain a sample for peel test.

[0079] (Example 2)

RF aqueous solution a prepared in Example 1 and DCB / VP mixture 1 [2 Chloro-1,3 butadiene-1,2,3 dichloro-1,3 butadiene copolymer (DCB) latex: burpyridin styrene butadiene latex (VP ) (Nippon A & L Co., Ltd., 40 masses of solid components. / ₀ , trade name: JSR0650) = 6: 4 (mass ratio)], sodium dioctylsulfosuccinate, and water, mass ratio 8 4: 50.4 (solid component): 5.0: Resorcin formalin Tex (RFU adhesive composition B) having the composition shown in Table 1 was used in the same manner as in Example 1 except that the composition was adjusted to 239. Obtained.

[0080] Next, a sample for a peel test was obtained in the same manner as in Example 1 except that the untreated polyester cotton canvas was immersed in the RFL adhesive composition B.

[0081] (Comparative Example 1)

RF aqueous solution a prepared in Example 1 and DCB / VP mixture 2 [2-chloro-1,3-butadiene 2,3-dichloro-1,3-butadiene copolymer latex: bullpyridine styrene butadiene latex (JSR Ltd., product number: 0650) = 4: 6 (mass ratio)], sodium dioctylsulfosuccinate, and water, mass ratio 8.4: 50.4 (solid component): 5.0 A resorcin formalin tex (RFU adhesive composition C) having the composition shown in Table 1 was obtained in the same manner as in Example 1 except that the composition was 239.

[0082] Next, a sample for a peel test was obtained in the same manner as in Example 1 except that the untreated polyester cotton canvas was immersed in the RFL adhesive composition C.

[0083] (Comparative Example 2) RF aqueous solution a prepared in Example 1, butyrpyridine styrene butadiene latex (VP) (JSR Corporation, product number: 0650), sodium dioctylsulfosuccinate, and water are in a mass ratio of 8.4: 50. 4 (Solid component): 5.0 Resorcin formalin tex (RFU adhesive composition D) having the composition shown in Table 1 was obtained in the same manner as in Example 1 except that it was formulated to be 239: 239. .

[0084] Next, except that an untreated polyester cotton canvas was immersed in the RFL adhesive composition D,

A peel test sample was obtained in the same manner as in Example 1.

[0085] [Table 1]

1) Product name: LH430 (32 wt.

2-K D port-1,3-F, N, Yen -2,3-Shi, Ku Kouguchi-1,3-Gamma Copolymer latex

2) Nippon Iron Co., Ltd. 1 Le Co., Ltd., trade name: JSR0650 (solid component 40 weight ¾)

'Nilhi. Rishi "Latex

[0086] (Test Example 1)

The adhesive strength of each sample of Examples 1-2 and Comparative Examples 1-2 was measured according to JIS 6256 (1999). Specifically, each peel test sample was cut to a width of 2.54 Ocm, and the resulting product was put into a peel tester, and the rubber sheet part and the polyester cotton canvas part became 180 °. Then, the adhesive strength was measured by peeling at a pulling rate of 50 mm / min. The results are shown in Table 2.

[0087] [Table 2]

[0088] As a result, as shown in Table 2, the fabric material was composed of polyester fibers, 2 Rho 1,3-Butadiene 2,3-Dichloro-1,3-Butadiene copolymer latex is contained as a latex component, and the 2-chloro-1,3-butadiene 2,3-dichloro- in the solid component of the latex component Polyester cotton canvas impregnated with a resorcin formalin latex adhesive composition having a content of 1,3-butadiene copolymer latex of at least 50 mass% (Example 1: 100 mass%, Example 2: 60 mass%) If it is, I is the adhesive strength becomes high force, Ru indicates that force ^s I force between the polyester cotton canvas and the adhesive rubber layer, Ru.

[0089] (Examples 3 and 4)

(1) Preparation of RFL adhesive composition

Resorcin, formalin (concentration at 37% by mass), sodium hydroxide, and water are blended in a mass ratio of 7. 31: 10. 77: 0.33 (solid component): 160. 91. Obtained. Specifically, resorcin and formalin (concentration at 37% by mass) are mixed and stirred, and an aqueous sodium hydroxide solution is added to the resulting mixture and stirred, and water is further added. The obtained mixture was aged for 5 hours to obtain an RF aqueous solution b having a solid component concentration of 6.40% by mass.

[0090] Next, the obtained RF aqueous solution b and 2 chloro-1,3-butadiene-2,3-dichloro-1,3 butadiene copolymer (DCB) latex [manufactured by Tosoichi Co., Ltd., trade name: LH430, solid Ingredients: 32% by mass] were blended so that the mass ratio of the solid components was 1.39: 13.49, and the resulting mixture was aged for 12 hours to produce RFL adhesive composition E (Example 3). )

[0091] Further, the RF aqueous solution b and the DCB / VP mixture 1 [2 black mouth 1, 3 butadiene 2, 3 latex = mass ratio 6: 4] are combined with the mass ratio of solid components 1. 39: 13. 49. An RFL adhesive composition F (Example 4) was obtained in the same manner as in Example 3 except that the formulation was such that

[0092] (2) Preparation of polyester core wire

A polyester filament was twisted into a strand, which was then twisted to obtain a polyester (polyethylene terephthalate) core. The obtained polyester core wire was immersed in a toluene solution of isocyanate (isocyanate solid content 20% by mass). Thereafter, the obtained polyester core was maintained at 240 ° C. for 40 seconds and dried to pretreat the polyester core. [0093] The pretreated polyester core wire obtained was immersed in the RFL adhesive composition shown in Table 3, and then maintained at 200 ° C for 80 seconds to dry, thereby performing the first RFL treatment. It was. Next, the obtained polyester core wire was immersed in the RFL adhesive composition shown in Table 3, and then maintained at 200 ° C. for 80 seconds to dry, thereby performing a final RFL treatment. Next, the polyester fiber after the treatment was immersed in an adhesive solution (the same ethylene propylene gen rubber used in the adhesive rubber layer composition of Production Example 1 dissolved in toluene). Thereafter, the obtained polyester cotton canvas was immersed in an adhesive solution. Thereafter, the obtained polyester core was maintained at 60 ° C. for 40 seconds and dried to obtain an adhesion-treated polyester core.

[0094] (3) Preparation of Adhesive of Polyester Core Wire and Adhesive Rubber Layer

An adhesive-treated polyester core is sandwiched between unvulcanized rubber sheets (thickness: 5 mm) made of the above adhesive rubber layer composition, and the resulting product is maintained for 35 minutes at a surface pressure of 3920 kPa and a temperature of 160 ° C. Then, press vulcanization was performed to obtain an adhesive.

[0095] (4) Manufacture of V-ribbed belt

A rubber-coated canvas was wound around the peripheral surface of a cylindrical molding drum (circumferential length 1200 mm) having a smooth surface, and an unvulcanized rubber sheet made of the composition for an adhesive rubber layer was wound on the rubber coat. Thereafter, the polyester core wire was spirally spun on the unvulcanized rubber sheet. At this time, the canvas was stuck in the bias direction so that the crossing angle between the warp and the weft was 120 ° when it was oriented in the longitudinal direction of the belt.

[0096] Further, an unvulcanized rubber sheet made of the composition for an adhesive rubber layer was wound around the polyester core wire. Thereafter, the compressed rubber layer composition was wound around an unvulcanized rubber sheet made of the adhesive rubber layer composition to obtain a laminate. The force, the laminate, internal pressure 5.92 2 X 10 ⁵ Pa, external pressure 8.8263 X 10 ⁵ Pa, 165. C for 35 minutes condition or 170. C was maintained in a vulcanizing can for 50 minutes and steam vulcanized to obtain an annular product.

[0097] Next, the annular object was attached to a first drive system including a drive roll and a driven roll. While the first drive system was running under a predetermined tension (1.17 × 10 ³ N), a plurality of ribs were formed on the surface of the annular object by a grinding wheel. Thereafter, the obtained annular object is further transferred to a second drive system composed of another drive roll and a driven roll. Installed and run, cut to the specified width, made of 3 ribs and 1000mm circumference [0098] [Table 3]

1) Product name: LH430 (solid component 32% by weight), manufactured by Tosoh Corporation

2-K DD-1, 3-F "Tha-Yen -2, 3-SH" DD-1, 3-H "T-H" Copolymer Latex

2) Japan Ian made by ιΜ 朱 type company, trade name: JSR0650 (solid weight 40 weight ¾)

Hi "Nilhi. Rishi" Latex

[0099] (Comparative Examples 3 and 4)

The aqueous RF solution b obtained in Examples 3 and 4 and bullpyridine styrene butadiene latex (manufactured by JSR Co., Ltd., product number: 0650) were mixed so that the mass ratio of the solid components was 1.39: 13.49. The resulting mixture was aged for 12 hours to obtain an RFL adhesive composition G (Comparative Example 3).

[0100] Further, the RF aqueous solution b and the DCB / VP mixture 2 [2 black mouth 1,3 butadiene 2,3 latex = mass ratio 4: 6) are mixed with a solid component mass ratio of 1.39: 13.49. An RFL adhesive composition H (Comparative Example 4) was obtained in the same manner as in Example 3 except that the formulation was such that

[0101] Same as Examples 3 and 4 except that the pretreated polyester cores of Examples 3 and 4 were treated with RFL using the RFL adhesive composition G or H. In addition, an adhesion-treated polyester core wire was obtained.

[0102] The obtained polyester core was embedded in an unvulcanized rubber sheet made of the composition for an adhesive rubber layer and vulcanized in the same manner as in Examples 3 and 4 to obtain an adhesive. Further, a V-ribbed belt was produced in the same manner as in Examples 3 and 4.

[0103] (Test Example 2)

Of the polyester core wires embedded in the adhesives of Examples 3-4 and Comparative Examples 3-4, 1 Three polyester core wires selected every other book were sandwiched between upper and lower chucks, and peeled simultaneously under the peeling conditions of 40 mm between chucks, peeling speed: 100 mm / min, peeling distance: 80 mm, and the adhesive strength was measured. . At the same time, the mode of fracture in the adhesive when the adhesive force was measured was observed. The results are shown in Table 4.

[0104] Further, as shown in Fig. 3, the V-ribbed belts of Examples 3 to 4 and Comparative Examples 3 to 4 are driven pulley 11 (diameter 120mm), driven pulley 12 (diameter 120mm), and the questions of these pulleys. It was attached to a benolet drive system (Fig. 3) consisting of an idler pulley 13 (70 mm diameter) and tension pulley 14 (55 mm diameter). The idler pulley 13 was engaged with the back surface of the V-ribbed belts of Examples 3 to 4 and Comparative Examples 3 to 4.

[0105] Under an ambient temperature of 130 ° C, the driven pulley load was 16 horsepower, the initial tension of the tension pulley was 8 · 33 X 10 ² N, and the drive pulley was driven at 4900 rpm. The belt's dynamic life was defined as the belt's running force and the running time until the core wire was exposed from the belt or the rubber layer was cracked. The results are shown in Table 4.

[0106] [Table 4]

[0107] As a result, as shown in Table 4, more than 50% by mass of the solid component of the latex component was 2 chloro-1,3 butadiene 2,3 dichloro-1,3 butadiene copolymer rubber. When impregnated with a certain RFL adhesive composition, high adhesion between the core wire and the ethylene _α -olefin rubber rubber is generated, and it can be seen that a transmission benolet with improved dynamic life can be obtained. .

[0108] (Comparative Example 5)

2 Chloro-1,3 Butadiene 2,3 Dichloro-1,3 Butadiene copolymer (DC B) latex (trade name: LH430, solid component: 32% by mass, manufactured by Tosohichi Corporation) In the same manner as in Example 1, except that EPDM rubber latex (trade name: Sepolex EP125 (solid component 51.5% by mass)) manufactured by Sumitomo Seika Co., Ltd. was used, RFL adhesive composition 1 (solid 15% by mass).

[0109] Next, except that an untreated polyester cotton canvas was immersed in RFL adhesive composition I

A peel test sample was obtained in the same manner as in Example 1. The adhesion was measured in the same manner as in Test Example 1 using the obtained peel test sample.

As a result, the adhesive strength is 1968. 5 N / m, which is inferior to that of Examples 1 and 2 above.

Industrial applicability

[0111] According to the present invention, it is possible to provide a transmission belt and a conveyance belt having high durability.

Claims

The scope of the claims

[1] A belt in which a rubber material and a fiber material are used, and the fiber material is bonded to the rubber material and used.

The fiber material is polyester fiber, cotton fiber, polyamide fiber, vinylon fiber, polyketone fiber, polyparaphenylene benzobisoxazole fiber, polyethylene fiber, polyarylate fiber, polyether 'ether' ketone fiber, glass fiber. And at least one fiber selected from the group consisting of aramide fibers, and at least 50% by mass of the solid component is composed of 2 1,2 butadiene, A belt characterized in that it is impregnated with a resorcin formalin latex adhesive composition containing a latex component which is a 3-dichloro-1,3-butadiene copolymer latex

Yes

[2] The belt according to claim 1, which is a transmission belt.

[3] The transmission belt has a laminated structure in which at least two types of rubber layers, an adhesive rubber layer and a compression rubber layer, are laminated, and a core wire that is the fiber material is embedded in the adhesive rubber layer. The belt according to claim 2, wherein the belt is used.

[4] The transmission belt has a laminated structure in which at least two kinds of rubber layers of an adhesive rubber layer and a compressed rubber layer are laminated, and the fabric material as the fiber material is an upper surface, a lower surface, or a 3. The belt according to claim 2, wherein the belt is adhered to the entire circumferential surface.

5. The belt according to claim 1, wherein the belt is a conveyor belt.

6. The conveyor belt according to claim 5, wherein the conveyor belt is provided with a rubber layer formed of the rubber material, and the fiber material is used in a state of being bonded to the rubber layer! Ruto.