JPH1046485A - Coated paper made from mixed glass fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a coated paper made from a mixed glass fiber capable of imparting a good flatness to a surface coated with a polyvinyl chloride sol and used as an economical backer material for a cushioning floor material. SOLUTION: This coated paper made from a mixed glass fiber comprises at least a glass fiber, a wood pulp and a binder fiber, and is obtained by coating with >=5g/m<2> resin composition layer containing a latex having good adhesion to polyvinyl chloride in terms of the solid. Moreover, the glass fiber especially including a micro glass fiber and a polystyrene-based latex used as the resin composition layer more improve the properties.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass fiber-mixed coated paper obtained by applying a resin composition containing a binder as a main component to a glass fiber-mixed paper manufactured by wet papermaking. The present invention relates to a glass fiber-mixed coated paper used for a backing sheet of a cushion floor material coated with (PVC sol).

[0002]

2. Description of the Related Art Cushion flooring made of foamed polyvinyl chloride (equivalent to foamed polyvinyl sol coating) is made of glass fiber mixed paper or glass fiber mixed coated paper as a backing material (= backer base fabric).
, Foamed PVC sol is applied and gelled by heating.
After printing and applying a transparent non-foaming PVC sol on it,
The whole is heated to foam the foamed PVC sol coating layer.

[0003] Recently, there has been a demand for a particularly high level of flatness as a cushion floor material. This is because if the surface is flat, the printed appearance is clear in addition to the cleanness of the appearance, which gives a favorable print for the user.

[0004] In order to obtain a cushion flooring material having a high flatness of the surface, the surface after the application of the foamed PVC, gelation and foaming must be flat. However, since the backer base fabric is a glass fiber-mixed paper, it has a porous structure because it contains at least 35% by weight or more of glass fibers having a diameter of 5 to 10 μm. The foaming state is not uniform, so that the surface is unlikely to be flat. For this reason, various measures have been devised to make the glass fiber mixed paper paper uniform and to obtain the flatness by infiltrating the PVC sol.

There are many inventions for filling the surface of a backer base fabric,
For example, as disclosed in Japanese Patent Publication No. 58-4618, the eyes are filled with aggregates of synthetic resin emulsions such as SBR and vinyl chloride and PVA fibers. However, since the aggregates of the synthetic resin emulsion are flocs, the effect of narrowing the eyes was not sufficient.

[0006] A method of covering the surface of glass fibers with flat fibers such as wood pulp has been proposed. As shown in Japanese Patent Publication No. 57-26232, a layer mainly composed of wood pulp containing no glass fiber is made, and the other layer of glass fiber is coated to eliminate the tingling on the back and protect the handling workers. You are. If the surface layer contains a large amount of wood pulp, it can be coated with glass fiber and the surface of the glass fiber mixed paper becomes flat, so the surface after PVC coating and foaming becomes flat, but wood pulp has water resistance and heat resistance. The effect is not sufficient because the blending amount is limited due to lack of dimensional stability.

[0007]

SUMMARY OF THE INVENTION The present invention significantly improves the flatness of the surface after PVC coating and foaming, which has been inadequate in the prior art, and has a dense printed surface as a cushion flooring material. It is an object of the present invention to provide a backer material which gives a beautiful impression and has good adhesiveness to a PVC coating layer, and which is less anxious about a manufacturing process. It is still another object of the present invention to provide a backer material having not only flatness of the surface but also heat resistant tensile strength, dimensional stability of heat resistance, tear strength, and interlayer strength between PVC and a substrate.

[0008]

That is, the present invention relates to a glass fiber mixed paper comprising at least a glass fiber, a wood pulp and a binder fiber, and the glass fiber mixed paper has a latex having good adhesion to polyvinyl chloride. It is a glass fiber mixed coated paper coated with a resin composition containing (Claim 1). Preferably, the glass fiber mixed paper is a glass fiber mixed coated paper characterized by containing micro glass fibers (Claim 2), wherein the glass fiber mixed paper contains 0 to 5% by weight of micro fibril cellulose. , A total of 5 to 1 of micro fibril cellulose and micro glass fiber
The glass fiber-mixed coated paper according to claim 1 or claim 2 containing 5% by weight. The glass fiber-mixed coated paper according to claim 1, wherein the glass fiber-mixed paper contains a pigment and SBR latex (claim 4). By providing a layer substantially free of glass fibers on the side opposite to the side on which the resin composition is provided,
A glass fiber-mixed coated paper using a glass fiber-mixed paper made up of layers. A glass fiber-mixed coated paper containing a styrene acrylic latex in a resin content of 1.5 g / m ² or more in the resin composition (Claim 6), wherein the resin composition contains a pigment. It is a coated paper (Claim 7), preferably a glass fiber mixed coated paper (Claim 8) whose pigment is Delami clay. Further, the means for applying the resin composition of the glass fiber-mixed coated paper is preferably a gravure coating method. These glass fiber mixed coated papers are useful as a backing material for cushion flooring materials (claims 10 and 11).

[0009]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below. In the present invention, what should be done to provide a glass fiber mixed paper in which the flatness of the surface after PVC coating / foaming is significantly improved,
I worked diligently. As a result, in the glass fiber mixed paper of the base paper, at least glass fiber, wood pulp and P
The resin composition to be formed of VA fiber preferably contains micro glass fiber or is filled with micro glass fiber and fine fiber of micro fibril cellulose, and the resin composition to be coated is polychlorinated. By applying a resin composition containing a latex having good adhesion with vinyl, a highly flat foamed PVC layer can be obtained,
A glass-mixed coated paper with good adhesion between the foamed polyvinyl chloride layer and the glass-mixed paper can be obtained. Among them, latex having good adhesiveness to the polyvinyl chloride layer has a solid content of 1.5%.
By containing g / m ² or more, the foamed PVC layer has high flatness, and sufficient adhesiveness can be secured. That is,
By providing a resin composition containing a latex that has a good adhesion between the glass fiber-mixed paper having a clogging effect and the PVC sol and also has a permeation suppression effect, the glass fiber is sufficiently covered, and the permeation of the PVC sol is reached, and The interlayer strength between the PVC and the substrate was also given. Further, the resin composition may contain a pigment to enhance the plugging effect. The use of Delami Clay, which has good coating properties, is further improved as the pigment.

The glass fiber-mixed coated paper of the present invention may have a single layer, but it is more preferable that the glass fiber-mixed paper has a two-layer structure in order to prevent the glass fiber from being exposed. That is, the layer (surface layer) on which the resin composition is applied is a layer containing glass fibers, and the opposite back layer is a layer containing at least wood pulp and binder fibers and not containing glass fibers.
The backside layer is the backside layer of the cushion flooring material and covers the surface layer of glass fibers to prevent tingling and protect the environment of the handling operator and the user.

The glass fiber mixed paper coated with the resin composition of the glass fiber mixed coated paper of the present invention (the surface layer in the case of two layers) will be described. The glass fiber mixed paper is made of glass fiber, wood pulp and binder fiber, and preferably contains 5 to 15% by weight of micro glass fiber.
It is a paper layer of 0 to 100 g / m ² . The flattened surface is filled with wood pulp, which is a flat fiber, and the binder fiber gives heat resistance. When the pigment and the SBR latex are contained in the paper layer, the pigment such as calcium carbonate and the SBR latex are agglomerated with a polyamide epichlorohydrin-based resin, flocs are formed, mixed with fibers, and the paper layer is formed and closed. The SBR latex has an effect of imparting heat resistance and permeating the PVC sol. As a fiber composition, 5-15% by weight of micro glass fiber is blended to further fill the eyes. Alternatively, 0 to 5% by weight of micro fibrils and cellulose is blended and used in combination with micro glass fiber, and the total of the two is blended to 5 to 15% by weight to close the eyes.

The glass fiber used in the present invention may be any glass fiber as long as it is hard to break and has a capability of forming a fiber sheet. However, usually, a fiber diameter of 6 to 13 μm and a fiber length of 6 to 25 mm are appropriate. is there. Further, since cocrete is alkaline, E glass having alkali resistance is preferable.

The wood pulp used in the present invention is NBK
P, LBKP, NBSP, LBSP, GP, TMP, or any other type of pulp may be used without any particular limitation, but NBKP is preferred from the viewpoint of plugging and strength. Also,
The degree of beating is preferably in the range of 300 to 600 CSF.

The binder fibers used in the present invention include PVA fibers, polyester fibers, vinylon fibers, and various types of core-sheath fibers, but PVA fibers are most preferred in view of working conditions, strength of wet paper and dried glass mixed paper. It is suitable. Binder fiber is 1 to 13 denier, fiber length is 3 to 1
One having a thickness of 0 mm is preferably used. If the fiber length is less than 3 mm, the band-inder effect tends to decrease,
When the ratio exceeds the above range, it tends to be difficult to make a mixed paper. In addition, various synthetic fibers, natural fibers, and inorganic fibers can be included as needed.

The mixing ratio of the glass fiber and the wood pulp having the plugging effect can be such that the wood pulp is used in an amount of 3 to 100 parts by weight with respect to 100 parts by weight of the glass fiber. If the ratio of the wood pulp is less than 3, the effect of filling is reduced, and it becomes necessary to mix the wood pulp with micro glass. 1
If the amount is more than 00 parts by weight, dimensional stability against heat becomes difficult.

The micro glass fiber used in the present invention will be described. Fiber diameter is less than 1.0 μm, 0.5-0.9μ
m. The effect of closing eyes is very large. The disadvantage is that the diameter and length are fine, and the entanglement with other fibers is weak, so that the tear strength is reduced, so that the paper is easily cut in the floor material manufacturing process. When the clogging is caused by the micro glass fibers, the permeation of the PVC sol is reached, and the flatness of the surface is improved. When the content is less than 5% by weight based on the glass fiber-mixed paper, the plugging effect by adding micro glass fibers is small, and when the content is more than 15% by weight, the tear strength is reduced and the paper is easily cut in the floor material manufacturing process. Absent.

The microfibril cellulose used in the present invention will be described. Fiber diameter is less than 0.1μm
It is in the range of 0.05 to 0.09 μm. The effect of closing eyes is greater than that of micro glass fibers, but the fibers are fine, so that they do not stay on the wire during papermaking, and because they are cellulosic, they have poor heat-resistant dimensional stability. Microfibril cellulose is added to the surface layer of the glass fiber mixed paper at 0 to 5% by weight, and 5 to 15% by weight in total with the micro glass fibers. If the microfibril cellulose is more than 5% by weight, dimensional stability decreases, which is not preferable. 5% by weight in total with micro glass fiber
If the amount is less than 15%, the effect of clogging by adding micro glass fibers is small. If the amount exceeds 15% by weight, the tear strength is reduced, and the paper is easily cut in the floor material manufacturing process. At the time of papermaking, the drainage on the wire deteriorates, the formation deteriorates, and the speed decreases, which tends to be undesirable.

The glass fiber mixed paper of the glass fiber mixed coated paper of the present invention preferably has a Frazier air permeability of 5 cc / cm ² / s or less. If it exceeds 5 cc / cm ² / s, the effect of clogging is insufficient, so even if a resin composition is applied to the surface, the effect of infiltration of the PVC sol due to insufficient coating of the glass fiber is insufficient, and It is not preferable because the flatness of the surface after visol coating and foaming does not reach a satisfactory level. Further, when the Frazier air permeability is less than 0.3 cc / cm ² / s, although the clogging is performed, the drainage on the wire during papermaking becomes poor, the formation is deteriorated, and the speed is unfavorably reduced. There is a tendency.

The above glass fiber mixed paper is coated with a resin composition to form a glass fiber mixed coated paper, on which foamed polyvinyl chloride is provided and used as a floor material. Since the glass fiber is exposed on the side opposite to the side where the resin layer of the material is provided, in the process of processing into floor material (the process of applying polyvinyl chloride sol) and the actual work of applying the floor, Give the workers a tingling sensation,
It is not preferable for hygiene.

The problem is solved by providing a layer substantially free of glass fibers on the side opposite to the side on which the resin composition layer is provided. The structure of the layer substantially free of glass fibers consists of at least wood pulp and binder fibers.
Its basis weight if the amount to cover the exposure of glass fibers is sufficient, ^{usually, 5g / m 2 ~30g / m} 2. Adhesion with the surface where the glass fiber is exposed can be made in a paper making process, bonded, or heat-fused to form a two-layer structure.

The resin composition of the present invention will be described. The binder is desired to have a high effect of suppressing the permeation of the PVC sol and to have good adhesiveness to the PVC sol, and a latex is preferable in order to have a sealing effect of the glass fiber gap. Latexes having good adhesiveness with polyvinyl chloride include polyvinyl chloride latex, styrene-butadiene latex, and styrene acrylic latex, among which styrene latex has good adhesiveness with PVC sol, so that PVC It has the effect of increasing the interlayer strength with the backer base fabric and suppressing the permeation of the PVC sol. In particular, styrene acrylic latex is preferred.

A pigment can be added to the resin composition for physically filling the resin composition. As the pigment, an inorganic pigment or an organic pigment may be used, as long as it has an affinity for a binder and does not have the property of falling off the pigment after coating and has an effect of retaining the binder on the surface of the glass fiber mixed paper. Fine particles such as kaolin, titanium dioxide, glass beads, various organic pigments, urea resin and styrene acrylate resin are used. In terms of economy, calcium carbonate is preferred. Delami clay is most preferable in consideration of cost, coating properties and film properties of the resin composition, and the like. Delami Clay has a good film-forming property and therefore has a high effect of suppressing the permeation of PVC. Therefore, a resin composition containing Delami clay and styrene acrylic latex is a suitable combination.

The coating amount of the coating composition of the glass fiber-mixed coated paper of the present invention will be described. The layer on the surface of the glass fiber mixed paper is preferably coated with a resin composition containing a latex having good adhesion to polyvinyl chloride, preferably at a solid content of 5 g / m ² or more. Even with a coating composition comprising a pigment and latex, by coating at a solid content of 5 g / m ² or more, clogging of the glass-mixed paper can be sufficiently performed, and the foamed polyvinyl chloride layer provided thereon can be smoother. become. In order to ensure the adhesion between the resin composition layer and the polyvinyl chloride layer, a latex having a good adhesion to the polyvinyl chloride layer of the resin composition is applied at a solid content of 1.5 g / m ² or more. Is preferred.

If the resin composition has a solid content of less than 5 g / m ² , the coating of the glass fiber mixed layer may be insufficient if the mixed layer is relatively rough in some cases, and the effect of suppressing the permeation of the vinyl sol will be insufficient. The flatness of the surface after coating / foaming tends to be insufficient. When a latex having good adhesion to the polyvinyl chloride layer is applied at a solid content of less than 1.5 g / m ² , the adhesion to the PVC sol tends to be insufficient.

In particular, a coating composition of Delami Clay and styrene acrylic latex is applied to a surface layer of glass fiber mixed paper at a solid content of 5 g / m ² or more (of which styrene acrylic latex is applied at a solid content of 1.5 g / m ^2). By coating), the glass fiber mixed layer is coated, the permeation of the PVC sol reaches, the flatness of the surface after the PVC sol coating and foaming is improved, and the interlayer strength between the PVC and the backer base fabric can be sufficiently imparted. .

The coating method of the glass fiber-mixed coated paper of the present invention will be described. The coating method may be selected and used according to the amount of coating and the viscosity of the coating liquid by various coating methods such as air knife, blade coating, etc. It was examined whether the coating can be performed efficiently with a small amount without penetrating into the inside of the paper layer. As a result, according to the gravure coating method, it can be understood that the coating amount can be adjusted by adjusting the cell depth and mesh of the gravure roll, ie, the engraving roll, in addition to the concentration and viscosity of the coating liquid, and further, By combining with the offset coating, the linear pressure at the time of coating can be reduced, so that the resin composition is adhered to the surface of the glass-mixed paper, and the clogging can be performed effectively. Thereby, the coating amount of the coating composition can be greatly reduced.

[0027]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

Comparative Example 1 A glass fiber (9 μ × 6 mm, manufactured by Asahi Fiber Co., Ltd.) was dispersed as follows. Nonionic NS-206 (manufactured by NOF CORPORATION) using pulper with water as an initial dispersant was added to glass fiber 3
After adding wt% and stirring, glass fiber was charged and stirred for 15 minutes. Then, 4% by weight of SN Dispersant 5034 (manufactured by San Nopco) as a dispersion stabilizer was added to glass, and then Acrypers L (manufactured by Diafloc) of an aqueous polymer polyacrylamide solution was added to 1.5% (solid) of glass fiber and reciprocated. The mixture was stored while being stirred by a rotary stirrer (Shimadaki Seisakusho).

NBKP Kamloops (freeness: 470 ml) after beaten into another pulper and PVA fiber (VPB manufactured by Kuraray)
107-1 × 3) were mixed and dispersed in water at a ratio of 66.7 / 33.3 and stored.

In another tank, SBR latex (T-24)
13 Nippon Synthetic Rubber Co., Ltd.) and calcium carbonate (NS100
Nitto Powder Co., Ltd.) was mixed and dispersed in warm water (80 ° C.) at a ratio of 50/50, and 6.5% (solid) of a polyamide epichlorohydrin resin (Polyfix 201, Showa Polymer) was added to the SBR latex. After flocculation, it was stored.
As the surface layer, the above glass fiber / NBKP / PVA fiber / SBR latex / calcium carbonate is 50/20 /
The mixture was mixed at the inlet of the primary screen so as to have a ratio of 10/10/10 and sent to Fourdrinier paper to form a web having a solid content of 80 g / m ² .

As the back layer, NBKP Kamloops after beating (freeness of 470 ml) and PVA fiber (VPB107) were used.
-1 × 3 Kuraray) Polyester fiber (1.5 denier × 5 mm, manufactured by Toray) was mixed and dispersed in water at a ratio of 80/10/10, stored, sent to a circular paper machine, and solid content was 10 g / m.
^Two webs were constructed.

As described above, the surface layer 80 g / m ² and the back layer 10 g / m ²
A glass fiber mixed paper having a total weight of 90 g / m ² and a total weight of 90 g / m ² was prepared by a long net, a round paper machine and a Yankee dryer.

Comparative Example 2 Glass fibers were dispersed and stored in the same manner as in Comparative Example 1.
In another pulper beaten NBKP Kamloops (freeness 47
0ml) and PVA fiber (VPB107-1 × 3 Kuraray)
Were mixed and dispersed in water at a ratio of 86/14 and stored.

As the surface layer, the above glass fiber / NBKP
/ PVA fibers are mixed at the primary screen inlet so as to have a ratio of 30/60/10, and the solid content is 80 g / m ² by a fourdrinier paper machine.
Wave.

As a back layer, NBKP / PVA fiber / polyester fiber dispersed and stored in the same manner as in Comparative Example 1 was sent to a round paper machine at a ratio of 80/10/10 to a net paper machine, and a fixed amount of 1
A web of 0 g / m ² was prepared. As described above, the surface layer 80 g /
m ^2, the back surface of the layer 10 g / m ^2, and paper making by total basis weight 90 g / m ² of the glass fiber mixed paper Fourdrinier-yen paper machine and Yankee dryers.

Reference Example 1 Glass fibers were dispersed and stored in the same manner as in Comparative Example 1. In another pulper, beaten NBKP Kamloops (freeness: 470 ml) and PVA fiber (VPB107-1 × 3 Kuraray) were mixed and dispersed in water at a ratio of 66.7 / 33.3. In another tank, the SBR latex and calcium carbonate were aggregated and stored in exactly the same ratio and method as in Comparative Example 1.

Micro glass (manville 106) was dispersed in another pulper as follows. 3% by weight of glass fiber with water and initial dispersant Disglan B
After the addition and stirring, micro glass was charged and stirred for 25 minutes. Thereafter, 4 wt% of SN Dispersant 5034 (manufactured by San Nopco) as a dispersion stabilizer was added to glass, and then Acrypers L of an aqueous solution of a high-molecular polyacrylamide was added.
(Diafloc) was added to glass at 1.5% (solid), and the mixture was stored with stirring by a reciprocating rotary stirrer (manufactured by Shimazaki Seisakusho).

As the surface layer, the above glass fiber / NBK
P / PVA fiber / SBR latex / calcium carbonate /
Micro glass is 48.5 / 19.4 / 9.7 / 9.7
/3.0 at the inlet of the primary screen and sent to a Fourdrinier paper machine to form a web with a solids content of 80 g / m ² .

As the back layer, beaten NBKP / PVA fibers / polyester fibers dispersed and stored in the same ratio and manner as in Comparative Example 1 were formed into a web having a solid content of 10 g / m ² by a circular paper machine.

As described above, the surface layer 80 g / m ² and the back layer 10 g / m ²
A glass fiber-mixed paper having a total weight of 90 g / m ² and a total basis weight of 90 g / m ² was prepared by a long net / circular net / paper machine and a Yankee dryer.

Reference Example 2 A surface layer was dispersed and stored in the same manner as in Reference Example 1. Glass fiber / NBKP / PVA fiber / SBR latex / calcium carbonate / micro glass is 47.5 / 1
The mixture was mixed at a primary screen inlet so as to have a ratio of 9.0 / 9.5 / 9.5 / 9.5 / 5.0 and sent to a fourdrinier paper machine to form a web having a solid content of 80 g / m ² . As the back layer, NBKP /
Solid content of PVA fiber / polyester fiber 1
The web was composed of 0 g / m ² . Above surface layer 80g /
m ^2, the back surface of the layer 10 g / m ^2, and paper making by total basis weight 90 g / m ² of the glass fiber mixed paper Fourdrinier-yen paper machine and Yankee dryers.

Reference Example 3 A surface layer was dispersed and stored in the same manner as in Reference Example 1. Glass fiber / NBKP / PVA fiber / SBR latex / Calcium carbonate / Micro glass is 45.0 / 1
8.0 / 9.0 / 9.0 / 9.0 / 10.0 ratio become as primary subscription of - emissions were mixed at the inlet to constitute a web of solids 80 g / m ² sends the Fourdrinier. NBKP dispersed and stored in the same ratio and method as Comparative Example 1 as the backside layer
/ PVA fiber / polyester fiber was formed into a web having a solid content of 10 g / m ^{2 by} a round paper machine. Above surface layer 80g /
m ^2, the back surface of the layer 10 g / m ^2, and paper making by total basis weight 90 g / m ² of the glass fiber mixed paper Fourdrinier-yen paper machine and Yankee dryers.

Reference Example 4 A surface layer was dispersed and stored in the same manner as in Reference Example 1. 42.5 / 1 glass fiber / NBKP / PVA fiber / SBR latex / calcium carbonate / micro glass
The mixture was mixed at the primary screen inlet so as to have a ratio of 7.0 / 8.5 / 8.5 / 15.0 and sent to a fourdrinier paper machine to obtain a solid content of 80.
A web of g / m ² was constructed. Comparative Example 1 as back layer
NBKP / PVA dispersed and stored in the same ratio and method as in
Fiber / Polyester fiber is 10g / m
² webs. Or layers 80 g / m ² of the surface, the back surface of the layer 10 g / m ^2, and paper making by total basis weight 90 g / m ² of the glass fiber mixed paper Fourdrinier-yen paper machine and Yankee dryers.

Reference Example 5 A surface layer was dispersed and stored in the same manner as in Reference Example 1. Glass fiber / NBKP / PVA fiber / SBR latex / Calcium carbonate / Micro glass is 40/16 /
The mixture was mixed at a primary screen inlet so as to have a ratio of 8/8/8/20 and sent to a fourdrinier paper machine to form a web having a solid content of 80 g / m ² . As a back layer, NBKP / PVA fiber / polyester fiber dispersed and stored in the same ratio and method as in Comparative Example 1 was constituted to have a solid content of 10 g / m ² by a circular paper machine.
Or layers 80 g / m ² of the surface, the back surface of the layer 10 g / m ^2, and paper making by total basis weight 90 g / m ² of the glass fiber mixed paper Fourdrinier-yen paper machine and Yankee dryers.

Reference Example 6 Glass fibers were dispersed and stored in the same manner as in Comparative Example 1.
NBKP and PVA fibers were dispersed and stored in the same ratio and method as in Comparative Example 1. The SBR latex and calcium carbonate were aggregated and dispersed in the same ratio and method as in Comparative Example 1 and stored.
Dispersion of micro fibril cellulose (manufactured by Cellish KY Daicel) was performed as follows. The microfibril / cellulose was put into the water of the pulper, stirred for 25 minutes, passed through a disintegrator (manufactured by Topfiner Aikawa Iron Works), stored in a storage tank and stirred.

As the surface layer, the above glass fiber / NB
KP / PVA fiber / SBR latex / calcium carbonate / microglass: 47.5 / 19.0 / 9.5 / 9.
The mixture was mixed at the primary screen inlet so as to have a ratio of 5 / 5.0 and sent to a fourdrinier paper machine to form a web having a solid content of 80 g / m ² . As a layer on the back surface, the mixture was dispersed and stored in the same ratio and method as in Comparative Example 1. NBKP / PVA fiber / polyester fiber was formed into a web having a solid content of 10 g / m ^{2 by} a round paper machine. As described above, the surface layer 80 g / m ² and the back layer 10 g / m ²
A glass fiber-mixed paper having a total weight of 90 g / m ² and a total weight of 90 g / m ² was produced by a fourdrinier / circular net paper machine and a Yankee dryer.

Reference Example 7 A surface layer was dispersed and stored in the same manner as in Reference Example 1. Glass fiber / NBKP / PVA fiber / SBR latex / calcium carbonate / microglass / microfibril cellulose dispersed and stored in the same manner as in Reference Example 6 was 47.5 / 19.0 / 9.5 / 9 / . 5
The mixture was mixed at the primary screen inlet so as to have a ratio of /9.5/3.0/2.0 and fed to a fourdrinier paper machine to form a web having a solid content of 80 g / m ² . It was dispersed and stored in the same ratio and manner as in Comparative Example 1 as a backside layer. NBKP / PVA fiber /
The polyester fiber was formed into a web having a solid content of 10 g / m ^{2 by} a round paper machine. The above-mentioned glass fiber-mixed paper having a surface layer of 80 g / m ² and a back surface layer of 10 g / m ² , having a total basis weight of 90 g / m ² , was produced by a fourdrinier / circular net paper machine and a Yankee dryer.

Reference Example 8 A surface layer was dispersed and stored in the same manner as in Reference Example 1. Glass fiber / NBKP / PVA fiber / SBR latex / Calcium carbonate / Micro glass / Micro fibril cellulose dispersed and stored in the same manner as in Example 6 was 45/18/9/9/9/5/5, respectively. The mixture was mixed at the inlet of the primary screen so as to obtain the ratio and fed to a fourdrinier paper machine to form a web having a solid content of 80 g / m ² . As a back layer, a web having a solid content of 10 g / m ² was formed in the same ratio and method as in Comparative Example 1. Or layers 80 g / m ² of the surface, the back surface of the layer 10 g / m ^2, and paper making by total basis weight 90 g / m ² of the glass fiber mixed paper Fourdrinier-yen paper machine and Yankee dryers.

Reference Example 9 A surface layer was dispersed and stored in the same manner as in Reference Example 1. Glass fiber / NBKP / PVA fiber / SBR latex / calcium carbonate / microglass / Micro fibril cellulose dispersed and stored in the same manner as in Reference Example 6 was 40/16/8/8/8/10/10 The mixture was mixed at the inlet of the primary screen so as to obtain the ratio and fed to a fourdrinier paper machine to form a web having a solid content of 80 g / m ² . The solid content is 10 g / m ² as the back layer in the same ratio and method as in Comparative Example 1.
Of the web. Or layers 80 g / m ² of the surface, the back surface of the layer 10 g / m ^2, and paper making by total basis weight 90 g / m ² of the glass fiber mixed paper Fourdrinier-yen paper machine and Yankee dryers.

Tables 1 to 3 show the composition and basis weight of the two layers of the front and back surfaces of Comparative Examples 1 and 2 and Reference Examples 1 to 9.

Table 4 shows the measurement results of the effects of the fine fibers of Comparative Examples 1 and 2 and Reference Examples 1 to 9 on the plugging effect, dimensional stability and tear strength.

Regarding the plugging effect, JIS-L-10
The smaller the numerical value of the measured Frazier air permeability used in No. 96, the more the eyes are clogged. The tear strength was measured by the Elmendorf C method used in JIS-L-1096. The larger the value, the higher the tear strength. It is determined that 100 g or more is required as the cushion flooring base fabric as a conventional rule of thumb from the time of PVC coating and the strength of the flooring product. Regarding the dimensional stability, the sheet cut to 30 cm × 30 cm is left in a room at a constant temperature and humidity of 20 ° C. and 65% RH for 24 hours, and the dimensions are measured with 5/100 mm accuracy. After leaving the sheet for 3 minutes in hot air drying at 200 ° C., the dimensions were measured with the same accuracy, and the shrinkage was determined. The closer to 0, the better the dimensional stability. According to the conventional empirical rule, it is determined that the shrinkage ratio is preferably within -0.1%, and at worst, within -0.2%.

[0053]

[Table 1]

[0054]

[Table 2]

[0055]

[Table 3]

[0056]

[Table 4]

Example 1 60 parts of calcium carbonate (Softon # 2200) and 40 parts of kaolin (Ultra Coat) were mixed in water, 0.1% by weight of a dispersant (sodium hexitametaphosphate) was added, and after stirring for 30 minutes, A dispersion clay having a concentration of 70% was prepared and stored in a storage tank with stirring.

Polyvinyl alcohol (PVA117)
Is mixed with water and heated to a water temperature of 90 ° C. while stirring to obtain a concentration of 1
A 0% lysate was made and stored in the tank.

The above-mentioned dispersed clay, PVA dissolution, and PVC latex (Viniblanc 654 Nisshin Chemical) were mixed at a solid content of 89/4/7 to prepare a coating solution having a concentration of 50%. Further, a thickener such as sodium alginate (Kelgin H)
V) 0.1% added and viscosity 500 cps (B type viscometer)
And stored with stirring.

The above coating solution was coated on the surface layer of the sheet prepared in Comparative Example 1 with an air knife coater at a solid content of 40 g / m ² to prepare a glass fiber mixed coated paper having a total basis weight of 130 g / m ² .

Example 2 Delami clay (Nu clay, manufactured by Engelhardt) was mixed with water, 0.1% by weight of a dispersant (sodium hexametaphosphate) was added, and after stirring for 30 minutes, a dispersion clay having a concentration of 65% was obtained. It was prepared and stored in a storage tank with stirring.

The above-mentioned dispersed clay and a 48% styrene acrylic latex (X-8887 Asahi Kasei) were mixed at a solid content of 66.7 / 33.3 to prepare a 50% concentration coating solution. . Furthermore, the thickener sodium aginate-
0.1% Da (Kelgin HV) is added and the viscosity is 500cps
And stored with stirring.

The above coating solution was applied to the surface layer of the sheet prepared in Reference Example 1 at a solid content of 10 g / m ² by gravure coater offset coating to obtain a glass fiber mixed coated paper having a total basis weight of 100 g / m ^2. Created.

Example 3 A coating solution prepared in the same manner as in Example 2 was coated on the surface layer of the sheet prepared in Reference Example 2 by a gravure coater offset coating at a solid content of 10 g / m ^{2 to} obtain a total basis weight of 100 g. /
A glass fiber mixed coated paper of m ² was prepared.

Example 4 The surface area of the sheet prepared in Reference Example 3 was coated with a coating solution prepared in the same manner as in Example 2 by a gravure coater offset coating at a solid content of 10 g / m ² to give a total basis weight of 100 g.
/ M ² was prepared.

Example 5 A coating solution prepared in the same manner as in Example 2 was applied to the surface layer of the sheet prepared in Reference Example 7 by gravure coater offset coating to obtain a solid content of 10 g / m ² and a total basis weight of 100 g / m ^2. m ²
Was prepared.

Example 6 A coating solution prepared in the same manner as in Example 2 was applied to the surface layer of the sheet prepared in Reference Example 2 by gravure coater offset coating to a solid content of 7 g / m ² , and the total basis weight was 97 g. / M ² was prepared.

Comparative Example 3 A coating solution prepared in the same manner as in Example 2 was applied to the surface layer of the sheet prepared in Reference Example 2 by gravure coater offset coating at a solid content of 5 g / m ^{2 to} give a total basis weight of 95 g. / M ² was prepared.

Example 7 A coating solution was prepared and stored in exactly the same manner as in Example 2 except that the ratio of deramiclay to styrene acrylic latex was 85/15. The coating liquid was solid 10 g / m ² coated by a gravure coater offset coating on the surface layer of the sheet prepared in Reference Example 2 to prepare a glass fiber mixed coated paper total basis weight of 100 g / m ^2.

Example 8 A dispersion clay and SB prepared in exactly the same manner as in Example 1
R latex (T-2413 Nippon Synthetic Rubber) was mixed at a solid content of 89/11, and the concentration was adjusted to 50.
% Coating solution was prepared. Further, 0.1% of a thickening agent sodium alginate was added, the viscosity was set to 500 CPS, and the mixture was stored with stirring. The surface layer of the sheet prepared in Reference Example 2 was coated with the above coating solution at a solid content of 40 g / m ² using an air knife coater.
A glass fiber mixed coated paper having a total basis weight of 130 g / m ² was prepared.

Example 9 The procedure of Example 1 was repeated, except that only one layer of the glass-mixed paper of the surface of the glass-mixed paper of Example 1 was used. When the foamed polyvinyl chloride sol was applied and evaluated as a flooring material according to the evaluation method described below, a glass-mixed coated paper having satisfactory flatness and adhesive strength could be obtained. In addition, the glass fiber is exposed on the side opposite to the side where the resin composition layer is applied, and there is a tingling sensation during the operation, and care must be taken.

Example 10 The coating method of Example 1 was changed to gravure coating,
The procedure was performed in the same manner as in Example 1 except that 5 g / m ² was applied. As a result, the same surface flatness and adhesive strength as those of Example 1 were obtained after the application of the foamed polyvinyl chloride sol. For this reason, the gravure coating method is superior to the air knife coating method as a coating method for glass mixed paper.

Tables 5 and 6 show the constitutions of the glass fiber mixed coated papers of Examples 1 to 8 and Comparative Example 3. Table 7 shows the clogging effect of the glass fiber-mixed paper and the glass fiber-coated paper of Comparative Examples 1, 3 and Examples 1 to 8, the flatness of the surface after the PVC sol coating, and the adhesion with the PVC sol. It shows about.

Regarding the plugging effect, JIS-L-109
The Frazier permeability used in No. 6 was measured. The smaller the numerical value, the more tightly packed.

Preparation of Cushion Floor Material The above sheet was cut into a width of 25 cm and a length of 30 cm, preheated in a constant temperature hot air drier at 110 ° C. for 30 seconds, and then placed on a glass plate so that the surface layer was on top. Foamed PVC sol (viscosity 5000-8000CP) for cushion flooring
(SB type viscometer) was applied with an applicator bar having a gap of 0.4 mm, and heated with a constant temperature hot air dryer at 200 ° C. for 20 seconds to gel. The non-foamed transparent PVC sol is further applied to the gelled sheet taken out and cooled with an applicator bar having a gap of 0.6 mm (coating gap is 0.2 mm).
The foamed PVC sol was foamed by heating in a 200 ° C. constant temperature hot air drier for 150 seconds, and the non-foamed PVC sol was gelled to prepare a cushion floor material.

Evaluation of Surface Flatness after PVC Coating The surface unevenness of the PVC surface of the cushion floor material prepared above was visually observed, and the thing with the least unevenness was grade 1 and the thing with the largest unevenness was grade 5. 1-5. The grades of the glass fiber mixed paper made by the conventional manufacturing method are 4 to 5, and those having grade 3 or less have improved flatness.

Evaluation of Adhesiveness between Base Material and PVC Sample of cushion floor material having a width of 50 mm and a length of 200 mm prepared as described above is cut and peeled between the base material and the PVC layer. The ends of the peeled two layers are fixed to upper and lower chucks of a Tensilon tensile tester (manufactured by Oriental), and the peel strength is measured by a method according to JIS-L-1096, and this is defined as the adhesive strength. According to the empirical rule of the peel strength required for the cushion flooring material, if the peel strength is 2.0 kg / 50 mm or more, it is acceptable (〇) 2 kg / 50 mm
If it is less than the above, it was not possible (x).

[0078]

[Table 5]

[0079]

[Table 6]

[0080]

[Table 7]

Comparative Example 1 is a glass fiber mixed paper having no surface coating and having a fragile air permeability of 10 cc / cm.
High ² / sec and insufficient clogging. Therefore, the permeation of the PVC sol is large, and the flatness of the surface of the PVC layer is poor at grade 5.

Comparative Example 2 is a glass fiber-mixed paper, in which a large amount of wood pulp is used and clogged without surface coating. Although the fragile was clogged at 3 cc / cm ² / sec, it had a large heat shrinkage of -0.25% and was not suitable as a base fabric for cushion flooring materials due to its dimensional stability.

Reference Examples 1 to 5 are glass fiber-mixed papers containing 3 to 20% by weight of micro glass fibers.
It can be seen that as the blending amount increases, the fragile air permeability decreases, and there is a clogging effect. A blending ratio of 3% by weight is not yet sufficient. It was also found that the tear strength decreased as the blending ratio increased, and when the blending ratio exceeded 15% by weight, it became weaker than 100 g / sheet and was not suitable for a base fabric of a cushion flooring material.

Reference Example 6 is a glass fiber-mixed paper containing 5% by weight of microfibrils / cellulose. Fragile air permeability is 7 cc / cm ² / sec, and clogging is not sufficient.
The designed basis weight is 80 g / m ^2, while the resulting basis weight is 77.4 g / m ^2.
remains from that low and m ² on the paper when the wire is because is bad.

Reference Examples 7 to 9 were prepared by using microfibril cellulose and microglass together in an amount of 5% by weight to 20%.
It is a glass fiber-mixed paper blended by weight. It can be seen that the Frazier air permeability decreases as the blending ratio increases, and that there is a plugging effect. Further, as the blending ratio increases, the tear strength decreases, and at a blending ratio of 20% by weight, the tear strength decreases to 80 g / sheet, and the heat shrinkage ratio is as large as -0.20%, which is suitable for a base fabric of a cushion flooring material. Absent. When used together with micro glass, the retention of micro fibrils and cellulose is improved.

In Example 1, a glass fiber-mixed paper was prepared by coating the glass fiber-mixed paper of Comparative Example 1 with calcium carbonate, kaolin as a filler, and a coating solution of PVA and PVC latex as a binder at 40 g / m ² using an air knife coater. It is paper. Since the coating amount was as large as 40 g / m ² , the Frazier air permeability was 1.5 cc and the flatness of the coated surface of the PVC sol was improved to grade 3. Although the clogging of the glass fiber mixed paper was not sufficient, the surface was covered although the coating liquid permeated between the paper layers due to the coating by the air knife coater.

In Examples 2 to 4, a coating liquid of styrene acrylic as a Delami clay binder as a filler was applied to the surface of glass fiber mixed paper containing 3% by weight, 5% by weight, and 10% by weight of micro glass fibers. Is a glass fiber-mixed coated paper coated with gravure coater at 10 g / m ² . The flatness of the surface coated with PVC sol was grade 3 in example 2, grade 2 in example 3, grade 1 in example 4,
The effect of clogging by the amount of micro glass mixed in the glass fiber-mixed paper is exhibited.
It is preferred that the content be not more than cc / cm ² / sec. For that purpose, the content of the microglass is more preferably made to be 5% by weight or more. The peel strength is 3 kg / 50 mm or more in all cases, and there is no problem with a coating amount of 10 g / m ² .

In Example 5, the surface of glass fiber blend paper containing micro fibrils and cellulose was applied to the surface of Delami clay clay.
It is a glass fiber mixed coated paper coated with a styrene acrylic coating liquid with a gravure coater. The flatness of the PVC coated surface is grade 2. The glass-mixed paper of Example 5
The combination of fibril cellulose and micro glass was 5% by weight, and the effect of the clogging effect due to the retention of micro fibril cellulose was found.

In Example 6 and Comparative Example 3, 5% by weight of micro glass fiber was blended. By a gravure coater a coating solution of delaminated clay / styrene acrylic = 66.7 / 33.3 in a glass mixed paper surface, glass混抄coating Example 6 5 g / m ^2, Comparative Example 3 was ² coated 3 g / m It is paper. The flatness of the surface coated with PVC sol was grade 2 in Example 6, grade 3 in Comparative Example 3, and the peel strength of Example 6 was 3.0 kg / 50.
mm and Comparative Example 3 are 1.5 kg / 50 mm, so that the coating amount is 5 g / m ² or more, and the binder amount is 1.5 g.
/ m ² or more is preferred.

In Example 7, a coating solution of delami clay / styrene acryl = 85/15 was applied to the surface of a glass-mixed paper mixed with 5% by weight of microglass using a gravure coater.
This is a glass mixed coated paper coated with 0 g / m ² . The flatness of the surface coated with PVC sol is as good as Grade 2, but the peel strength is as low as 2.0 kg / 50 mm. Therefore, when the binder in the coating layer is 1.5 g / m ^2, the adhesive strength is sufficient. Is obtained.

In Example 8, 5% by weight of microglass was blended. This is a glass-mixed coated paper obtained by applying a coating solution of calcium carbonate as a filler and SBR latex as a kaolin binder on the surface of the glass-mixed paper by an air knife coater at 40 g / m ² . The flatness of the surface coated with the PVC sol is grade 3, the peel strength is 2.0 kg / 50 mm, the surface flatness is improved, and the adhesiveness is good although the effect is lower than when styrene-acrylic latex is used.

[0092]

According to the present invention, there is provided a resin composition comprising a glass fiber mixed paper comprising at least glass fiber, wood pulp and a binder fiber, wherein the glass fiber mixed paper contains a latex having good adhesion to polyvinyl chloride. 5 layers at solids
g / m ² or more coated glass fiber-coated paper, characterized in that the cushion flooring material produced using this paper has excellent flatness of the surface coated with PVC sol and uses PVC sol. It is possible to obtain economical products with small quantities and high commercial value.

Claims (11)

[Claims] 1. A glass fiber mixed paper comprising at least a glass fiber, a wood pulp and a binder fiber, and the glass fiber mixed paper is coated with a resin composition containing a latex having good adhesion to polyvinyl chloride. Glass fiber mixed coated paper characterized by the following. 2. The glass fiber mixed coated paper according to claim 1, wherein the glass fiber mixed paper contains micro glass fibers. 3. The glass fiber mixed paper contains 0 to 5% by weight of microfibril cellulose, and the total of microfibril cellulose and microglass fiber is 5 to 15%.
The coated glass fiber-coated paper according to claim 1, wherein the glass fiber-containing coated paper is contained by weight. 4. The glass fiber-mixed coated paper according to claim 1, wherein the glass fiber-mixed paper contains a pigment and an SBR latex. 5. A glass fiber mixed paper comprising two layers by providing a layer substantially free of glass fibers on the side opposite to the side on which the resin composition is provided. The glass fiber-mixed coated paper according to the above. 6. The glass fiber-mixed coated paper according to claim 1, wherein the resin composition contains 1.5 g / m ² or more of styrene acrylic latex in solid content. 7. The glass fiber-mixed coated paper according to claim 1, wherein the resin composition contains a pigment. 8. The coated paper of claim 7, wherein the pigment is Delami clay. 9. A method for producing a glass fiber-mixed coated paper, wherein the means for applying the resin composition of the glass fiber-mixed coated paper according to claim 1 is a gravure coating method. 10. The glass fiber-mixed coated paper according to any one of claims 1 to 8, which is used as a backing material for a cushion flooring material. 11. The method for producing a glass fiber-mixed coated paper according to claim 9, which is used as a backing material for a cushion flooring material.