JPH0248657B2 - SANSOKOZONOFUKUGOSHIOYOBISONOSEIZOHOHO - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a composite yarn having a three-layer structure, specifically, a metal fiber as a core fiber, an aromatic polyamide fiber forming an intermediate layer, a natural fiber forming an outermost layer, and/or a metal fiber as a core fiber. Composite yarn made by twisting and wrapping synthetic fibers is particularly characterized by its excellent covering properties.
The present invention relates to an ultra-high strength composite yarn that can greatly expand the range of applications and a method for producing the same. (Prior Art) Aromatic polyamide fibers have been highly evaluated as high-strength organic fibers suitable for various industrial applications such as ropes, cables, safety protection fabrics, and coating base fabrics. On the other hand, metal fibers such as stainless steel fibers, which have processability comparable to organic fibers and properties of metals, are also being used in various fields of the textile industry, and various applications are being attempted. Therefore, in search of a stronger ultra-high tenacity fiber that takes advantage of the advantages of both of the above-mentioned fibers and compensates for their disadvantages, attention is being paid to composite yarns in which metal fibers such as stainless steel fibers are coated with aromatic polyamide fibers. This composite yarn emphasizes the characteristics of both fibers, such as high strength, high cutting strength, and heat resistance, through the synergistic effect of combining them, and improves the processability of metal fibers, such as weaving, which is slightly inferior to metal fibers. It has the effect of suppressing electrical conductivity and thermal conductivity, and is suitable as a material for safety work gloves and the like. However, since the sheath portion of the above-mentioned composite yarn is composed of aromatic polyamide fibers, the disadvantages of the fibers become disadvantages of this composite yarn, and this is a major hindrance to expanding its uses. That is,
Aromatic polyamide fibers have a severe discoloration, and it is unavoidable that the problem of discoloration will occur as soon as they come into contact with the outside air.For this reason, the development of applications tends to be limited to industrial and work use, and it is difficult for the general public to accept it. This is the reality. As a means to compensate for the disadvantages of aromatic polyamide fibers, it has been proposed to coat the fibers with other fibers. This is intended to solve the above-mentioned problem by covering aromatic polyamide fibers with other fibers, fibers suitable for appearing on the surface without the problem of browning. However, in view of the above-mentioned circumstances, we have developed a three-layer composite yarn, that is, a metal fiber as a core fiber, which is coated with an aromatic polyamide fiber to obtain an ultra-high strength fiber, and which is further coated with an appropriately selected outermost layer fiber. There is a need for a composite yarn that can cover the disadvantages of aromatic polyamide fibers. However, even if one tries to manufacture such a composite yarn by the usual ring traveler method, it is impossible or impossible to completely cover the core fiber with the intermediate layer fiber and the outermost layer fiber. If anything, it is extremely difficult and involves all kinds of problems in spinning. (Problems to be Solved by the Invention) In the above-mentioned three-layered composite yarn, the quality of its coverage is an extremely important issue. In other words, if the outermost fiber layer is incompletely covered and some bare parts remain on the surface of the yarn, when this is made into textiles, the bare parts will be exposed in some places, and even if dyed, these bare parts will not be dyed. As a result, the value of the product will inevitably be severely damaged. However, this dyeing requires a two-bath dyeing method, which requires a lot of effort and time. Therefore, the present inventor found that it is appropriate to adopt the open-end spinning method, adsorption twisting method, and DREF method as a means of achieving complete and strong coverage in spinning this three-layer composite yarn. We obtained the knowledge that Regarding this DREF method, please refer to the Japanese Patent Application Laid-Open No. 56
As disclosed in No. 53213, it is possible to cut all types of composite yarn due to its mechanism, but it is possible to completely cut an ultra-high strength composite yarn with a three-layer structure with metal fiber as the core fiber as in the present invention. Moreover, it was extremely difficult to manufacture the product without any bare parts under a strong coating action. The final quality of the three-layer composite yarn described above largely depends on the coverage of the middle layer fibers over the core fibers, and if this coverage is not complete and strong, the outermost layer fibers will inevitably be covered. It is inevitable that the yarn will also be incomplete, resulting in a defective yarn with many bare parts. The present invention completely coats metal fibers such as stainless steel fibers with aromatic polyamide fibers, and further coats them with natural fibers and/or synthetic fibers without any bare parts, thereby making the metal fibers and aromatic polyamide fibers make full use of the characteristics of fibers, and superficially exhibit the appearance and properties of natural fibers and/or synthetic fibers,
The object of the present invention is to provide a three-layer composite yarn with excellent dyeability and processability, and a method for producing the same. (Means for Solving the Problems) In order to achieve the above object, the three-layer composite yarn of the present invention has the following configuration. That is, it is a three-layer composite yarn obtained by the adsorption twisting method of the open-end spinning method, in which the core fiber is a single wire, filament yarn, or spun yarn of metal fiber such as stainless steel fiber. The core fibers are covered with staples of aromatic polyamide fibers to form an intermediate layer, which is further covered with natural fibers and/or staples of aromatic polyamide fibers.
or coated with synthetic fiber staples to form the outermost layer, and the abrasion strength of the outermost layer is
JIS L1095 7, 10, 1A method, 20 or more,
The gist is that the abrasion strength of the intermediate layer is set to 40 or more according to the same method. The second invention is an optimal manufacturing method for obtaining the three-layer composite yarn of the present invention, in which the core fiber is a single wire, filament yarn, or spun yarn of metal fiber such as stainless steel fiber. When manufacturing a composite yarn with a three-layer structure in which the middle layer is covered with aromatic polyamide fiber staples and the outermost layer is covered with natural fiber and/or synthetic fiber staples, the middle layer fibers are covered with a roving drawing mechanism. From there, the core fibers are passed through a core fiber supply path to a merging guide disposed immediately before the front roller of the roving drawing mechanism, and then to an adjusting means for controlling the overlapping state of both fibers in the merging guide. After that, they are continuously supplied, and then they are rotated in the same direction in close contact with each other.
At the same time, the outermost layer fibers are passed between two parallel suction drums and through a yarn drawing roll, and at the same time, the outermost layer fibers are passed from a roll stretching mechanism above the suction drums through a guide path to between the suction drums, and the abrasion strength of the outermost layer is increased. is 20 or more according to JIS L1095 7, 10, 1A method, and the abrasion strength of the intermediate layer is 40 or more according to the same method.
The gist of this invention is to manufacture the composite yarn as described above. (Function) As mentioned above, the three-layer composite yarn of the present invention is completely and strongly coated with no bare parts due to its unique manufacturing method, and the coating is completely and strongly coated during spinning and knitting. Since the woven fibers do not peel off and have excellent dyeability and processability, it is possible to provide a high quality ultra-high strength woven or knitted fabric. That is, the core fibers and the intermediate layer fibers are fed from separate supply paths between the suction drums after the overlapping state of both fibers at the front roller nip point located just before the suction drum is selected and set to the optimum state. Since the twisted coating is applied, even metal fibers with smooth surfaces that are difficult to coat can be completely coated without bare parts. Therefore, the outermost layer fibers, which have been made parallel and individualized by drawing, are fed to the two-layer yarn thus formed from above the suction drum,
The coating fixes the twisting of the two-layer yarn. The thus obtained three-layer composite yarn has extremely excellent covering properties since the core fiber is completely and strongly covered by the intermediate layer fiber and then fixed by the outermost layer fiber. It takes full advantage of the characteristics of the fibers of seeds. Hereinafter, embodiments of the present invention will be described in detail based on the drawings. (Example) FIG. 1 is an explanatory diagram showing an example of a three-layer composite yarn of the present invention. In the figure, 1 is the core fiber, which is a metal fiber such as stainless steel fiber, 2 is the intermediate layer fiber, which is an aromatic polyamide fiber, and 3 is the outermost layer, which is the staple fiber, which is appropriately selected from natural fibers and/or synthetic fibers. It is used as First, the method for manufacturing a composite yarn of the present invention will be explained based on FIGS. 2 and 3, which show an embodiment of an apparatus for carrying out the method. In these figures, 4
is a roving drawing mechanism consisting of a plurality of rolls having a circumferential speed that increases in the yarn running direction,
A roving guide 5 is disposed immediately in front of each pair of rolls. The fiber bundle (intermediate layer fiber) 2 such as a sliver drawn out from the can (C ₁ ) is drawn while passing through the drawing mechanism 4 and the roving guide 5, and then passed through the merging guide 7 just before the front roller 6. is supplied to On the other hand, the core fiber 1 is supplied to the above-mentioned merging guide 7 via a core fiber supply path 8 and a core fiber guide 9. Two parallel suction drums 10 are provided on the drawing line of the drawing mechanism 4 and rotate in the circumferential direction while being closely juxtaposed to each other. Immediately after the fibers 2 leave the nip point of the front roller 6, they are sucked into the suction drum 10, and their rotation twists them so that the fleece of the intermediate layer fibers 2 is wrapped around the core fibers 1. It's summery. Further, another roll stretching mechanism 11 is provided above the suction drum 10, and a guide passage 13 that opens within the suction area is provided between the exit roll pair 12 of the roll stretching mechanism 11 and the suction drum 10. exists. The fiber bundle pulled out from the can (C ₂ ) is stretched through the roll stretching mechanism 11 to be made parallel and individualized, and is supplied between the suction drums 10 as the outermost layer fibers 3, and then to the core fibers 1. The outermost layer is coated while the twisted coat of the intermediate layer fibers 2 is fixed. The thus formed three-layer composite yarn Y is drawn out in parallel to the axis of the suction drum 10 by a yarn drawing roll 14. Furthermore, in the above-mentioned apparatus, the position of at least one of the core fiber guide 9 and the roving guide 5 can be adjusted in a direction perpendicular to the yarn running direction. This is to stack the core fibers 1 and intermediate layer fibers 2 in an optimal form in the merging guide 7 disposed just before the front roller 6, and then send them to the front roller 6. [A] By fixing the core fiber guide 9 and adjusting the roving guide 5, the intermediate layer fibers 2 are supplied to the merging guide 7 according to the position of the core fiber 1 supplied to the merging guide 7. [B] By fixing the roving guide 5 and adjusting the core fiber guide 9, the position of the core fiber 1 on the merging guide 7 can be adjusted according to the position of the intermediate layer fiber 2 being supplied. [C] By adjusting both the core fiber guide 9 and the roving guide 5, the position of the core fiber 1 in the merging guide 7 and the corresponding feeding position of the intermediate layer fiber 2 can be adjusted. There are three options: to do so, and to choose from these as appropriate. When comparing the three configurations mentioned above, it was found that configuration [A] was preferred over configuration [B], that is, the supply position of the intermediate layer fiber 2 was changed according to the position of the core fiber 1 supplied to the roving guide 7. It was easier and more reliable to make the adjustment by adjusting the position of. Furthermore,
Naturally, more delicate adjustment is possible with the configuration [C]. That is, the core fiber guide 9 and the roving guide 5
It is preferable that the positions of both of the above are adjustable so that the optimum form can be implemented depending on the situation. As mentioned above, various known means can be used as a mechanism for attaching the guides 5, 9 so that their positions can be adjusted in a direction perpendicular to the thread running direction. For example, a bolt or nut type as shown in FIGS.
By appropriately tightening the guides 5 and 9 with
One example is one whose position can be adjusted in the direction (direction). The roving guides 5 are provided at multiple locations in the roving stretching mechanism 4 area, three locations in this example, but it is not necessary to provide the above-mentioned position adjustment mechanism for all of these. A sufficient effect can be obtained by making the position of only the one immediately in front of the guide 7 adjustable. In the present invention, the core fiber metal fibers refer to those that can be processed in common sense and have the same softness as ordinary fibers, such as silver, copper, nickel, etc.
There are various materials such as iron, aluminum, or those plated on the surface of organic synthetic fibers, but in particular, they are chemically stable and do not rust easily, and are suitable for single wire, filament yarn, and spun yarn. Preferably, stainless steel fibers are used because they have the advantage that they can be used in any form. Furthermore, the natural fibers of the outermost layer include cotton, wool, hemp, etc., and the synthetic fibers include polyester, polyamide, acrylic fiber, rayon, acetate, etc. When selecting the outermost layer fiber from among these, it is preferable to consider the purpose of the present invention and to select one that does not have the problem of discoloration or fading, and furthermore, one that has excellent dyeability. The abrasion strength described in the present invention was measured in accordance with JIS L1095 general spun yarn testing method 7, 10 abrasion strength 7, 10, 1A method using a testing machine 18 as shown in FIG. In the tester 18, a metal cylinder with a diameter of 7.6 cm is wrapped with abrasive paper (JIS R6258 waterproof abrasive paper No. 1200), and the sample (thread) is wrapped around it at a rate of 0.3 gf/tex.
A load of {0.00265N/tex} was applied to the cylinder, the rotation speed of the cylinder was 130 times per minute, and the distance was 10.
Move back and forth between cm. Therefore, we measured the number of reciprocating frictions until (a) when the outermost layer fibers wore out and the intermediate layer fibers appeared on the surface, and (b) when the core fibers appeared on the surface, and calculated the maximum number of times. The abrasion strength of the outer layer fibers is shown in (a) above, and the abrasion strength of the middle layer fibers is shown in terms of the number of reciprocating frictions up to (b) above. The number of tests shall be 10, and the average value shall be used. Specific example 1 Core fiber...stainless steel single wire (wire diameter 0.13M/M) Middle layer fiber...aromatic polyamide fiber staple (fineness 2.0, fiber length 38M/M) 30% Outer layer fiber...ester staple 12% (fineness 1.8, Fiber length: 38M/M) The above-mentioned three-layer composite yarn was produced by the production method of the present invention, and the above-mentioned abrasion strength test was conducted. In addition, as a comparative example, a composite yarn having a similar three-layer structure was manufactured using a conventional manufacturing method using the DREF method, that is, an adjustment means for controlling the overlapping state of the core fiber and intermediate layer fiber in the merging guide just before the front roller. Manufactured by a manufacturing method not provided. Samples were taken from each of the two locations and tested, and the results are shown in the table below.

[Table] Specific examples of abrasion strength of fibers 2 Core fiber...stainless steel single wire (wire diameter 0.1M/M) Middle layer fiber...aromatic polyamide fiber staple (fineness 1.5, fiber length 38M/M) 30% Outer layer fiber...cotton Staple 15% (Fineness 4.5 Fiber length 31M/M) The same test as in Example 1 was conducted on the composite yarn having the above structure. The results are shown in the table below.

[Table] As is clear from the results shown in the above two specific examples, the three-layer composite yarn of the present invention was obtained by the unique manufacturing method of the present invention. The abrasion strength of the outermost layer fiber is 20 or more, and the abrasion strength of the middle layer fiber is 40 or more, but on the other hand, conventional composite yarns, that is, they are made of the same material and have the same three-layer structure. However, if the above-mentioned value is not met, the composite yarn is completely unsuitable as a composite yarn, and problems such as easy peeling of the coating due to friction with the reed during fiber-making often occur. In other words,
As a composite yarn, there is no bare part at all, and there is no unevenness on the surface even when spinning or knitting, and the ultra-high strength yarn is free from the problem of browning and can be easily and beautifully dyed using a one-bath dyeing method. The three-layer composite yarn obtained by the present invention, that is, the outermost layer fiber has an abrasion strength of 20 or more, preferably 25 or more, more preferably 30 or more, and the middle layer fiber has an abrasion strength of 40 or more. , preferably 45 or more, more preferably 50 or more. When the three-layer composite yarn of the present invention produced in Example 2 was produced, it had the appearance of a cotton fabric with no unevenness on the surface, and was beautifully dyed with cotton dyeing. Furthermore, when gloves were manufactured using the composite yarn of Example 1 and a usage test was conducted, they showed remarkable resistance to the load applied by a knife from above,
Even when I swung the meat cleaver down from a cm above, the blade did not damage anything inside the glove. (Effects of the Invention) As described above, the three-layer composite yarn of the present invention has high strength, high cutting strength, and heat resistance by coating metal fibers such as stainless steel fibers with aromatic polyamide fibers. In addition to making more effective use of the characteristics of metal fibers, we also improved the processability, which is slightly inferior to metal fibers, and also solved the problem of browning by covering them with natural fibers and/or synthetic fibers. It is an ultra-high strength composite yarn with a unique appearance. In addition, in the manufacturing method of the present invention, it is possible to completely and strongly coat metal fibers, which was extremely difficult and incomplete in the past, so even if the outermost layer fibers are coated, the coating properties are also excellent. However, the high quality of the products obtained from this composite yarn through processing processes such as spinning and knitting is remarkable, and it is used not only for industrial purposes but also for demands for strength and beauty in appearance. This will expand the range of applications and further demonstrate its effectiveness.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing one embodiment of the three-layer composite yarn of the present invention, Figs. 2 and 3 are explanatory diagrams of its manufacturing equipment, and Figs. 4 and 5 are main parts of the same equipment. FIG. 6 is an explanatory diagram of the test method. DESCRIPTION OF SYMBOLS 1... Core fiber, 2... Middle layer fiber, 3... Outermost layer fiber, 4... roving stretching mechanism, 5... roving guide, 5a... yarn path, 6... front roller, 7
... Merging guide, 8 ... Core fiber supply path, 9 ...
Core fiber guide, 9a... Yarn path, 10... Suction drum, 11... Roll stretching mechanism, 12... Output roll pair, 13... Guide path, 14... Yarn drawing roll, 15... Machine stand, 16 ...Bolt, 17...Nut, 18...Testing machine, 19...Drive motor,
C ₁ , C ₂ ... Kensu, Y ... Composite yarn.

Claims (1)

[Claims] 1. A three-layer composite yarn obtained by the adsorption twisting method of the open-end spinning method, in which the core fiber is a single wire of metal fiber such as stainless steel fiber, filament yarn, or The core fibers are covered with staples of aromatic polyamide fibers to form an intermediate layer, and this is further coated with natural fibers and/or fibers.
or coated with synthetic fiber staples to form the outermost layer, and the abrasion strength of the outermost layer is
A composite yarn having a three-layer structure, characterized in that the abrasion strength of the intermediate layer is 40 or more according to the JIS L1095 7.10.1A method, and the abrasion strength of the intermediate layer is 40 or more according to the same method. 2. The core fiber is a single wire, filament yarn or spun yarn of metal fiber such as stainless steel fiber, the middle layer is covered with aromatic polyamide fiber staples, and the outermost layer is covered with natural fiber and/or synthetic fiber staples. When manufacturing a three-layer composite yarn, the intermediate layer fibers are drawn from the roving drawing mechanism.
The core fibers are passed from the core fiber supply path to a merging guide disposed immediately before the front roller of the roving stretching mechanism, and through an adjusting means for controlling the overlapping state of both fibers in the merging guide. Afterwards, the yarn is passed between two parallel suction drums that rotate in the same direction in close contact with each other and to a yarn drawing roll, and at the same time, the yarn is passed from a roll stretching mechanism above the suction drum to a guide passage. The stretched outermost layer fiber is supplied between the suction drums, and the abrasion strength of the outermost layer is JIS L1095 7.10.1A.
A method for producing a three-layer composite yarn, characterized in that the intermediate layer has an abrasion strength of 40 or more according to the same method. 3. The adjustment means for controlling the overlapping state of the core fibers and intermediate layer fibers in the merging guide is configured to control the overlapping state of the core fibers and intermediate layer fibers in the roving guide provided in the roving stretching mechanism and the core fiber guide provided immediately before the merging guide. The three-layer structure composite according to claim 2, wherein the mutual position of the guides is adjusted, and the position of at least one of these guides is adjustable in a direction perpendicular to the yarn running direction. How to make yarn.