JP2001159092A - Glass fiber sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide antibacterial and antifungal glass fiber sheets that has excellent resin layer quality after treatment with a resin and shows good adhesion between the component layers and is useful as a flooring material, wall material and the like. SOLUTION: The glass fiber sheet according to this invention mainly comprises wet nonwoven fabric that includes glass fibers with an average fiber diameter of 7 μm and wood pulp with Canadian standard freeness of >=500 ml but no fiber with an average diameter of <=6 μm where the woven fabric is impregnated with a water-repellent and oil-repellent agent and has the polymer binder layer mainly comprising a polymer binder and a pigment, preferably the ratio of the water-repellent and oil-repellent agent to the nonwoven fabric is 0.001-0.05 and the ratio of the pigment to the polymer binder layer is 0.1-0.8. In a preferred embodiment, thermally fusible fibers are admixed to the nonwoven fabric.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass fiber sheet used for building materials such as flooring material, wall material, ceiling material and the like.
In particular, the present invention relates to a glass fiber sheet having a resin surface having good smoothness when treated with a synthetic resin or the like for use as a floor material or a wall material.

[0002]

2. Description of the Related Art Conventionally, asbestos paper has been used for building materials such as flooring materials, wall materials, ceiling materials, etc. However, cracks are liable to occur, fine dust is generated, and there is a problem in safety. For this reason, glass fiber sheets are used as an alternative due to dimensional stability, but due to the low density, synthetic resin etc. smeared on the sheet penetrates and penetrates to the back side, causing process problems and surface smoothness. Had a problem.

[0003] In order to solve this problem, improvements have been made by using organic fine fibers such as pulp or by treating with a polymer binder.

[0004] For example, Japanese Patent Application Laid-Open No. 9-310284 discloses a nonwoven fabric sheet for a surface material containing glass fibers having an average diameter of 7 µm or more, fibers having an average diameter of 6 µm or less, and a fluorine-based water / oil repellent as main components.

However, fibers having an average diameter of 6 μm or less,
In particular, when papermaking is performed by a wet papermaking method using pulp obtained by highly beating cellulose fibers, the formation of the nonwoven fabric is extremely deteriorated, and a foamable vinyl chloride resin paste or the like is applied by post-processing and foamed. In such a case, it was found that the resin surface had a conspicuous unevenness, and had a defect that the smoothness deteriorated.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the conventional problems, and the nonwoven fabric formed by the wet papermaking method has good formation, and the surface smoothness after application of a polyvinyl chloride resin paste or the like is improved. An object of the present invention is to develop a glass fiber sheet that provides a floor material, a wall material, and the like that are excellent in decorative property.

[0007]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention. That is, (1) The glass fiber sheet of the present invention comprises glass fiber and wood pulp as main components, and does not contain fibers having an average diameter of 6 μm or less. A fiber sheet having an average diameter of glass fiber of 7 μm or more, and a Canadian standard freeness of wood pulp of 500 ml or more;
The nonwoven fabric contains a water and oil repellent and a polymer binder, and the polymer binder layer contains a polymer binder and a pigment as main components.

(2) The glass fiber sheet of the present invention has a mass ratio of wood pulp to glass fiber of the nonwoven fabric of 0.5 to 0.5.
3 is a glass fiber sheet according to (1).

(3) In the glass fiber sheet of the present invention, the mass ratio of the water / oil repellent contained in the nonwoven fabric is 0.001 to 0.0.
5 is the glass fiber sheet of (1) or (2).

(4) In the glass fiber sheet of the present invention, the polymer binder layer provided on the surface of the nonwoven fabric has a solid content of 5 to 5%.
The glass fiber sheet according to (1) to (3), which has a weight of 25 g / m ² .

(5) The glass fiber sheet according to (1) to (4), wherein the mass ratio of the pigment contained in the polymer binder layer to the whole layer is 0.1 to 0.8. It is.

(6) The glass fiber sheet of the present invention is a glass fiber sheet according to any one of (1) to (5), wherein the nonwoven fabric contains heat-fusible fibers.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the glass fiber sheet of the present invention will be described in detail. The present invention is a nonwoven fabric made by a wet papermaking method containing glass fiber having an average diameter of 7 μm or more and wood pulp having a Canadian standard freeness of 500 ml or more as a main component and containing no fiber having an average diameter of 6 μm or less. The glass fiber sheet contains an oil repellent and a polymer binder, and is provided with a polymer binder layer containing a polymer binder and a pigment as main components. Here, the “principal component” is the total of 20
It means that it is contained in an amount of about mass% or more.

The reason why the nonwoven fabric whose main component is glass fiber having an average diameter of 7 μm or more is preferable is because the dimensional stability is improved. Preferably, the glass fiber is 35% by weight or more of the fiber constituting the nonwoven fabric. When the average diameter is smaller than 7 μm, the paper is easily broken during papermaking by a wet papermaking method, and there is a problem in workability and dimensional stability.

The average diameter of the glass fiber used in the present invention is generally 7 to 15 μm, and from the viewpoint of processability, it is 13 μm.
m or less is preferable because the fiber spacing becomes dense. The average fiber length is generally 3 to 25 mm. If the average fiber length is less than 3 mm, the strength of the nonwoven fabric is weak, and if it is 25 mm or more, the formation deteriorates, which is not preferable.

The wood pulp used in the present invention has a Canadian standard freeness of 500 ml or more. Freeness is 500m
When the amount is less than 1, the pulp fiber tends to be entangled with the glass fiber at the time of dispersion or papermaking, resulting in poor formation.
This phenomenon occurs when there are many rigid fibers such as glass fibers.In general, during papermaking, it is better to beat the pulp fibers appropriately and lower the freeness. This is the direction in which the situation improves.

The average fiber length of the wood pulp used in the present invention is not particularly limited, but is preferably 2 mm or more as measured by a fiber length measuring device FS-100 manufactured by Kajaani. If it is shorter than 2 mm, the pulp is likely to be entangled with the overlapped portion of the glass fibers, so that the pulp is likely to be aggregated, and the formation of the nonwoven fabric tends to deteriorate.

The wood pulp used in the present invention includes chemical pulp such as sulfite pulp, alkali pulp and kraft pulp obtained from hardwood and softwood, semi-chemical pulp, chemimechanical pulp, mechanical pulp and the like, and used paper pulp. It is possible. Unbeaten pulp or pulp lightly beaten to a Canadian standard freeness of 500 ml or more is used.

The mass ratio of wood pulp to glass fiber used in the present invention is preferably 0.5 to 3. If it is less than 0.5, the water- and oil-repellent agent and the polymer binder hardly remain on the nonwoven fabric, and even when the polymer binder layer is provided, the polymer binder and the pigment are hardly retained on the nonwoven fabric surface. If it is more than 3, the dimensional stability of the nonwoven fabric is inferior, and the formation deteriorates.

The glass fiber and the fiber other than the pulp constituting the non-woven fabric used in the present invention may be of any type, and examples thereof include polyacryl, polyester, polyethylene, polypropylene, polyamide, vinylon and nylon.
Natural fibers such as cotton and hemp, regenerated fibers such as rayon and cupra, and semi-synthetic fibers such as acetate and triacetate are appropriately used in combination.

The synthetic fiber other than the glass fiber preferably has an average diameter of 10 μm in order to fill the gap between the glass fibers.
Although it is as follows, fibers thicker than 6 μm are used from the formation of the nonwoven fabric, and the average fiber length is preferably 3 to 15 mm.

In the nonwoven fabric used in the present invention, the tensile strength of the nonwoven fabric and the adhesiveness to the synthetic resin layer can be improved by preferably using the heat-fusible fiber in 5% by weight or more of the nonwoven fabric. The heat-fusible fiber is a fiber which is partially or entirely softened or melted by heat and fused with an adjacent fiber, and is preferably softened or melted at about 200 ° C. or lower.

Since the heat-fusible fiber is fibrous, it can be bonded to a plurality of other fibers. In addition to obtaining effective strength, appropriate voids are apt to remain in the non-woven fabric. The water- and oil-repellent agent and the polymer binder are easily permeated, and the synthetic resin applied to the surface is appropriately penetrated, and the anchoring effect at the interface between the nonwoven fabric and the synthetic resin is also improved.

If the ratio of the heat-fusible fibers contained is too large, the ratio of the glass fibers decreases, and a problem arises in dimensional stability. Preferably it is 30% by mass or less of the nonwoven fabric.

The average fiber diameter of the heat-fusible fibers is larger than 6 μm, and the average fiber length is 3 mm or more.

The heat fusible fiber used in the present invention may be a single fiber such as a polyvinyl alcohol fiber, a viscose fiber, a polyolefin fiber such as polyethylene or polypropylene, or a low melting polyester fiber, or a core-sheath type (consistent with a core-shell type). ) And side-by-side (same as side-by-side) composite fibers. For example, a combination of a polypropylene core and a polyethylene sheath, a combination of a high-melting polyester core and a low-melting polyester sheath, and further, a parallel type fiber can be used in those combinations.

When a heat-fusible fiber is used for a nonwoven fabric mainly composed of glass fiber, a strong polymer compound layer which is hot-melted at the softening temperature or higher than the melting temperature is provided on the nonwoven fabric. It is preferable because adhesiveness can be obtained.

For example, a nonwoven fabric mainly composed of glass fiber has a melting point of 1
When 5% by mass or more of polyethylene-based heat-fusible fibers at 30 ° C. is used and polyethylene resin is hot-melt extruded and laminated at 280 ° C., the heat-fusible fibers and polyethylene are fused and strongly adhered. Is obtained.

In the present invention, the nonwoven fabric is formed by a wet papermaking method. The preferred reason is that a dense nonwoven fabric having few voids can be obtained.

The wet papermaking method is a method in which fibers are dispersed at a low concentration in water, and a dispersing agent, a cohesive agent, a coagulant, a paper strength enhancer, a sizing agent, and the like are added as necessary. It refers to a method of producing a nonwoven fabric using a fourdrinier paper machine, an inclined paper machine, or a combination paper machine combining two or more paper machines.

The basis weight of the nonwoven fabric of the present invention is selected depending on the application, such as strength and tactile sensation, but is generally 20 to 300 g / g.
m ² , preferably 30 to 150 g / m ² .

The nonwoven fabric of the present invention contains a water and oil repellent and a polymer binder by impregnation or the like. The mass ratio of the water / oil repellent to the nonwoven fabric is preferably 0.001 to 0.05.
If it is less than 0.001, the polymer binder layer penetrates into the nonwoven fabric, resulting in poor smoothing and filling effects. 0.05
If the amount is larger, the adhesiveness between the polymer binder layer and the nonwoven fabric is reduced.

As the water / oil repellent used in the present invention, a fluorocarbon type is mainly used, and examples thereof include an acrylate polymer type and a phosphate ester type. Asahigard AG-550 (manufactured by Asahi Glass Co., Ltd.), Sumirezu Resin FP-210 (manufactured by Sumitomo Chemical Co., Ltd.), Asahigard AG-
530 (made by Asahi Glass Co., Ltd.), Sumirezu Resin FP-150
(Manufactured by Sumitomo Chemical Co., Ltd.).

Examples of the polymer binder include urethane polymer compounds, styrene-butadiene polymer compounds, acrylic polymer compounds, acrylonitrile-butadiene polymer compounds, ester polymer compounds, styrene polymer compounds, and amide polymer compounds. Olefin-based polymer compounds such as a polymer compound, a vinyl chloride compound, a vinyl acetate compound, a fluorine compound, a silicon compound, an ethylene polymer compound and a propylene polymer compound. In the case of applying a foaming resin paste, for example, a polyvinyl chloride paste in the post-processing, the surface smoothness is appropriately selected depending on the interlayer strength, but from the surface smoothness, a plasticizer such as dioctyl phthalate is contained. It is preferable to have resistance or to suppress penetration of the plasticizer by swelling.

The polymer binder layer provided by coating or impregnating on the nonwoven fabric used in the present invention contains the same polymer binder and pigment as those impregnated in the nonwoven fabric as main components, a surfactant, A foaming agent or the like is appropriately used.

As the pigment, kaolin, clay, calcium carbonate, aluminum silicate, aluminum hydroxide and the like can be used. Additives such as surfactants are of a kind used in general coated papers such as art paper and coated paper. Things can be used.

The solid mass of the polymer binder layer is generally 5 to 40 g / m ² per unit surface area of the nonwoven fabric. Preferably it is 5 to 25 g / m ² . If the amount is less than 5 g / m ² , the effect of filling the nonwoven fabric cannot be obtained, and 40 g / m ²
If it is larger, the weight of the glass fiber sheet increases, and it becomes difficult to handle, and curl is likely to occur, which is not preferable.

The mass ratio of the pigment to the entire polymer binder layer is preferably from 0.1 to 0.8. If it is less than 0.1, the effect of filling the nonwoven fabric with the pigment is inferior, and if it is more than 0.8, the fixation of the pigment to the nonwoven fabric is reduced, which tends to cause powder dropping and dirt in the processing step.

In order to provide a polymer binder layer on the nonwoven fabric, an air knife coater, a gravure coater, a blade coater, a rod coater, a curtain coater, a die coater or the like can be used.

Various nonwoven fabrics and coating layers may be provided on the side of the nonwoven fabric of the present invention opposite to the surface on which the polymer binder layer is provided. In this case, the nonwoven fabric may contain fibers having an average diameter of 6 μm or less as long as the effects of the present invention can be obtained.

[0041]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following examples.
In addition,% and parts indicate mass% and parts by mass, and unless otherwise described, a solid value.

Example 1 A non-woven fabric mainly composed of glass fiber and wood pulp was adjusted to a concentration of about 0.05% by appropriately adding polyacrylamide in the following fiber constitution, and was then sealed with a square hand box. Then, it was pressed and dried to prepare a nonwoven fabric having a basis weight of 80 g / m ² . Glass fiber (average fiber diameter 9 μm, average fiber length 10 mm) 45 parts Wood pulp fiber (non-beaten NBKP, average fiber length 3.5 mm for Kayani equipment) 45 parts Vinylon fiber (Kuraray, average fiber diameter 10 μm, average fiber length) 3mm) 10 parts

The obtained nonwoven fabric was impregnated with an impregnating liquid having the following composition so that the water / oil repellent had a solid content of 2 g / m ² (mass ratio to the nonwoven fabric: 0.025), and was dried at 120 ° C. A water / oil repellent impregnated nonwoven fabric was obtained. Water and oil repellent (Asahi Guard AG530, Asahi Glass Co., Ltd.) 10 parts Styrene-butadiene latex (Asahi Kasei Corporation, 620) 40 parts

On the surface of the obtained non-woven fabric impregnated with a water and oil repellent, a coating solution having the following composition was applied by a coating rod to obtain a solid content of 1%.
It was applied so as to be 0 g / m ² and dried at 120 ° C. to obtain the glass fiber sheet of Example 1. Styrene-butadiene latex (Asahi Kasei Corp., 620) 50 parts Polyvinyl alcohol (Kuraray Corp., 117) 10 parts Kaolin (EMC Corp., Ultra White 90) 40 parts

Examples 2 and 3 Examples 2 and 3 were repeated in the same manner as in Example 1 except that the fiber composition of the nonwoven fabric was changed as shown in Table 1.
Was obtained.

Example 4 In Example 1, unbeaten NBKP was weakly beaten NBKP (Canadian standard freeness 500 ml, average fiber length of Kayani apparatus 3 mm)
A glass fiber sheet of Example 4 was obtained in the same manner as in Example 1 except for changing the above.

Example 5 The amount of the water and oil repellent impregnated in the nonwoven fabric was 0.08 g in solid content.
The glass fiber sheet of Example 5 was obtained in the same manner as in Example 1 except that the glass fiber sheet was impregnated so as to have a mass ratio of 0.001 / m ² to the nonwoven fabric.

Example 6 The amount of the water / oil repellent impregnated in the nonwoven fabric was 4 g / m ^{2 in} solid content.
(Mass ratio to nonwoven fabric 0.05) to obtain a glass fiber sheet of Example 6 in the same manner as in Example 1.

Example 7 The amount of the water- and oil-repellent agent impregnated into the nonwoven fabric obtained in Example 1 was adjusted to 5 g / m ² in solid content (mass ratio to the nonwoven fabric: 0.06
A glass fiber sheet of Example 7 was obtained in the same manner except that the glass fiber sheet was impregnated so as to satisfy 25).

Example 8 The glass fiber sheet of Example 8 was prepared in the same manner except that the solid content of the polymer binder layer applied to the water / oil repellent impregnated nonwoven fabric obtained in Example 1 was changed to 5 g / m ^2. I got

Example 9 A glass fiber sheet of Example 9 was obtained in the same manner except that the composition of the polymer binder layer applied to the nonwoven fabric impregnated with the water / oil repellent obtained in Example 1 was changed to the following composition. . Styrene-butadiene latex (Asahi Kasei Corporation, 620) 10 parts Polyvinyl alcohol (Kuraray 117) 10 parts Kaolin (EMC Ultra White 90) 80 parts

Example 10 A glass fiber sheet of Example 10 was obtained in the same manner except that the composition of the polymer binder layer applied to the nonwoven fabric impregnated with the water / oil repellent obtained in Example 1 was changed to the following composition. . Styrene-butadiene latex (Asahi Kasei 620) 70 parts Polyvinyl alcohol (Kuraray 117) 20 parts Kaolin (EMC Ultra White 90) 10 parts

Example 11 Average fiber diameter 9 used in Example 1
A glass fiber sheet of Example 11 was obtained in the same manner except that the glass fiber having an average fiber diameter of 7 μm and the average fiber length of 10 mm was replaced with the glass fiber having an average fiber length of 10 μm.

Comparative Example 1 A glass fiber sheet of Comparative Example 1 was obtained in the same manner as in Example 1 except that the fiber composition of the nonwoven fabric was changed as follows. Glass fiber (average fiber diameter 9 μm, average fiber length 10 mm) 45 parts Wood pulp fiber (beaten NBKP, Canadian standard freeness 450 ml, Kayaani machine average fiber length 3 mm) 45 parts Vinylon fiber (manufactured by Kuraray Co., Ltd., average fiber diameter 10 μm) , Average fiber length 3mm) 10 parts

Comparative Example 2 Comparative Example 2 was carried out in the same manner as in Example 1 except that the following composition was used.
Was obtained. Glass fiber (average fiber diameter 9 μm, average fiber length 10 mm) 60 parts Rock wool (average fiber diameter 5 μm, average fiber length 1 mm) 20 parts Pulp fiber (strong beaten NBKP, Canadian standard freeness 50 ml, Kajaani equipment average fiber length) 1.5 parts) 10 parts Vinylon fiber (Kuraray Co., Ltd., average fiber diameter 10 μm, average fiber length 3 mm) 10 parts

Comparative Example 3 The nonwoven fabric obtained in Example 1 was impregnated with an impregnating solution containing only styrene-butadiene latex (620, manufactured by Asahi Kasei Corporation) at a solid content of 8 g / m ² and dried at 120 ° C. Thus, a polymer binder-impregnated nonwoven fabric was obtained. On the surface of the obtained polymer binder-impregnated nonwoven fabric, a coating solution having the same composition as in Example 1 was applied by a coating rod so as to have a solid content of 10 g / m ² , and dried at 120 ° C. to obtain a glass fiber of Comparative Example 3. I got a sheet.

Comparative Example 4 A non-woven fabric impregnated with a water- and oil-repellent agent was obtained from the non-woven fabric obtained in Example 1 in the same manner as in Example 1, and a glass fiber sheet of Comparative Example 4 was provided without providing a polymer binder layer.

<Non-woven fabric formation> Examples 1 to 11, Comparative Example 1
To 4 (Nomura Shoji Co., Ltd., FMT
-2000). Table 2 shows the results. The formation index is 10 times the coefficient of variation obtained by dividing the standard deviation of the absorbance by the average absorbance. There was a good correlation with the visual evaluation.

<Surface quality of resin-coated surface> The surface of the glass fiber sheets obtained in Examples 1 to 11 and Comparative Examples 1 to 4 on which the polymer binder layer was provided (one of the surfaces in Comparative Example 4) was polychlorinated. A paste sol having a mass ratio of dioctyl phthalate 60 to 100 of a vinyl resin (126, manufactured by Zeon Corporation) was applied to 100 g / m ² , treated at 200 ° C. for 1 minute, and cooled to evaluate surface properties. In four steps, 1 was the best. Evaluation 4 is a level at which the embossed pattern on the synthetic resin surface is flat and the unevenness is conspicuous and practically difficult. The results are shown in Table 2.

<Adhesive Strength at Interface between Glass Fiber Sheet and Polyvinyl Chloride Resin Layer> Samples of the glass fiber sheets obtained in Examples 1 to 11 and Comparative Examples 1 to 4 which were evaluated for surface properties of the polyvinyl chloride resin coated surface. The ease of peeling was evaluated by hand. In four steps, 1 was the best. The results are shown in Table 2.

[0061]

[Table 1] (Note 1) Glass fiber A (average fiber diameter 9 μm, average fiber length 10 mm) Glass fiber B (average fiber diameter 7 μm, average fiber length 10 mm) Pulp fiber A (unbeaten NBKP, average fiber length of Kayani apparatus 3.5 mm) Pulp Fiber B (weakly beaten NBKP, Canadian standard freeness 500 ml, Kayani apparatus average fiber length 3 mm) Pulp fiber C (beaten NBKP, Canadian standard freeness 450 ml, Kayani apparatus average fiber length 3 mm) Pulp fiber D (strongly beaten NBKP) , Canadian standard freeness 50 ml, Kajaani device average fiber length 1 mm) Vinylon fiber (manufactured by Kuraray Co., Ltd., average fiber diameter 10 μm, average fiber length 3 mm) Rock wool (average fiber diameter 5 μm, average fiber length 2 mm)

[0062]

[Table 2]

Results: Of these glass fiber sheets,
Any of the glass fiber sheets suitable for flooring and wall materials having good surface quality, excellent decorativeness, and excellent durability coated with a polyvinyl chloride resin paste are included in the present invention. .

The glass fiber sheet using the beaten pulp of Examples 1 to 3 has a Canadian standard freeness of 450 m of Comparative Example 1.
1, the beaten pulp having an average fiber length of 3 mm in the Kajaani apparatus and the average freeness of Comparative Example 2 being 50 ml, and the average fiber length being 1 mm
In all cases, the surface quality of the polyvinyl chloride resin surface is better than that in the case of using strongly beaten pulp. The surface quality tends to decrease regardless of whether the ratio of the pulp fiber to the glass fiber is high or low, and the case where the glass fiber and the pulp fiber of Example 1 are equal in amount was the best. In Examples 1 to 3, the adhesion between the resin surface and the glass fiber sheet was also good.

The Canadian standard freeness of Example 4 is 500 m
1. When a weakly beaten pulp fiber having an average fiber length of 3 mm is used, the nonwoven fabric formation and resin surface quality are slightly lower than those of the unbeaten pulp fiber of Example 1, but the freeness is 450 m of Comparative Example 1.
The resin surface quality was better than using 1 beaten pulp fiber.

In Examples 5 to 7, the content of the water / oil repellent of Example 1 was changed, and the results were compared with those of 2 g / m ^{2 of} Example 1 (mass ratio to nonwoven fabric: 0.025). 0.08 g / m ² of Example 5 (weight ratio to nonwoven fabric 0.00
In 1), the resin surface quality was inferior, but Comparative Example 3 in which the water and oil repellent was omitted was inferior to Example 5. At 4 g / m ² in Example 6 (mass ratio to nonwoven fabric: 0.05), the adhesiveness between the nonwoven polymerized binder surface and the resin surface was reduced, but the resin surface quality was good. At 5 g / m ² of Example 7 (with a mass ratio of 0.0625 to the nonwoven fabric), the adhesiveness between the resin surface and the glass fiber sheet was further reduced, and although it was the practical lower limit, the resin surface quality was good.

In Example 8 in which the coating solid content of the polymer binder layer in Example 1 was changed from 10 g / m ² to 5 g / m ² , the resin surface quality and the adhesiveness between the resin layer and the glass fiber sheet were reduced. In Comparative Example 4 in which the polymer binder layer was not provided, the resin surface quality was inferior to that in Example 8, and in the case of a flat pattern, the unevenness was conspicuous and the practical use was difficult. The adhesion between the resin layer and the glass fiber sheet was at the lower limit of practical use.

In Example 9 in which the pigment ratio of the polymer binder layer was changed to 0.8, the resin surface quality tended to be lower than that in Example 1 in which the ratio was 0.4. The adhesion between the layer and the resin surface was reduced. In Example 10 where the ratio was 0.1, the resin surface quality was reduced, but the adhesion between the resin surface and the glass fiber sheet was as good as in Example 1.

In Example 11 in which the glass fibers having an average fiber diameter of 9 μm and an average fiber length of 10 mm used in Example 1 were replaced with glass fibers having an average fiber diameter of 7 μm and an average fiber length of 10 mm, the nonwoven fabric formation and the resin surface quality were improved. Although the tendency was slightly worse, there was no difference in the adhesiveness between the resin layer and the glass fiber sheet.

Comparative Example 3 was a case where the water / oil repellent was removed in Example 1, and the resin surface quality was significantly inferior. Comparative Example 4 is a case where the polymer binder layer was not provided in Example 1,
The resin surface quality and the adhesiveness between the nonwoven fabric and the resin surface were also poor.

In Example 11, an average fiber diameter of 6 μm was used instead of glass fiber having an average fiber diameter of 7 μm and an average fiber length of 10 mm.
m, and a glass fiber sheet was obtained in the same manner as in Example 1 except that glass fibers having an average fiber length of 10 mm were used, but the dimensional stability was inferior to that of Example 11.

[0072]

As described above in detail with reference to Examples and Comparative Examples, according to the present invention, floor materials and wall materials having good resin surface quality and good adhesion between constituent layers can be obtained. It is possible to provide the obtained glass fiber sheet.

Continued on front page F-term (reference) 4L055 AA01 AF04 AF09 AF21 AG27 AG37 AG63 AG64 AG71 AG76 AG97 AH02 AH23 AH24 AH37 AJ04 BE10 EA04 EA05 EA14 EA16 EA32 FA13 FA14 FA19 GA23 GA39

Claims (6)

[Claims] 1. A glass fiber sheet comprising a nonwoven fabric made by a wet papermaking method and comprising a polymer binder layer on a surface of a nonwoven fabric containing glass fibers and wood pulp as main components and containing no fibers having an average diameter of 6 μm or less. Has an average diameter of 7 μm or more, and has a Canadian standard freeness of 500 for wood pulp.
a glass fiber sheet, wherein the nonwoven fabric contains a water / oil repellent and a polymer binder, and the polymer binder layer contains a polymer binder and a pigment as main components. 2. The glass fiber sheet according to claim 1, wherein the mass ratio of the wood pulp to the glass fiber of the nonwoven fabric is 0.5 to 3. 3. The mass ratio of the water / oil repellent contained in the nonwoven fabric to the nonwoven fabric is 0.001 to 0.05.
The glass fiber sheet according to the above. 4. The glass fiber sheet according to claim 1, wherein the polymer binder layer provided on the surface of the nonwoven fabric has a solid content of 5 to 25 g / m ² . 5. The mass ratio of the pigment contained in the polymer binder layer to the entire layer is 0.1 to 0.8.
The glass fiber sheet according to the above. 6. The glass fiber sheet according to claim 1, wherein the nonwoven fabric contains heat fusible fibers.