JP3495586B2 - Glass fiber blend coated paper for flooring applications and method of making same - Google Patents

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 paper produced by a wet paper machine, which is coated with a resin composition containing a pigment and a binder as main components. The present invention relates to a glass fiber mixed coated paper used as an intermediate base fabric for a cushion floor material useful for light walking, which is produced by coating vinyl chloride (foamed vinyl chloride sol).

[0002]

2. Description of the Related Art Cushion floor materials made by applying foamed vinyl chloride sol include backer type and glass made by coating foamed vinyl chloride sol on the surface of glass fiber mixed paper as a backing material. There is a sandwich type in which fibrous paper is used as an intermediate base cloth and foamed vinyl chloride sol is applied to the front and back thereof. The former is used by fixing it to the floor surface with an adhesive. The latter is used by laying it on the floor surface with or without an adhesive, and since it may be laid down, it has the advantage of being easily used at home.

Conventionally, as an intermediate base cloth, a glass fiber paper made of glass fiber having a fiber diameter of 5 μm to 15 μm and a fiber length of 6 mm to 25 mm by a wet papermaking method using PVA or vinyl acetate as a binder is used. Glass fiber paper has a basis weight of 30
g / m ² ~50g / m ² is mainly a Frazier air permeability that is higher than the air permeability 300 cm / s, which is a feature, applying the salt Bizoru on both excellent in permeability of the Tameshio Bizoru It is suitable for giving interlayer strength.

In a method of manufacturing a sandwich type cushion floor material using glass fiber paper as an intermediate base cloth, step release paper is used as a support, and foamed vinyl chloride sol is first coated on the surface of the step release paper, and After dropping glass fiber paper into the polyvinyl chloride sol and causing it to heat and gel once, it is further coated with foamed polyvinyl chloride sol, heated and gelled, and printed.
A method of applying non-foaming transparent PVC sol for surface reinforcement, then heat-foaming and peeling from the process paper to make it, after undercoating glass fiber paper with non-foaming PVC sol, heat-gelling it and applying a sealing process. There is a method in which foamed vinyl chloride sol is applied on both sides to form a gel by heating and printing, and a non-foaming vinyl chloride sol for reinforcement is applied and heat-foamed. The method of (2) consumes a large amount of release paper in the process, so the method is expensive. In the method of (3), the process stain is likely to occur due to the leakage of vinyl chloride sol from the glass fiber paper during sealing, and the vinyl chloride sol is applied four times. However, there are problems that the production efficiency is poor and the cost is high, and the weight of the PVC sol partitioning material used for the sealing process is heavy.

Further, when the glass fiber mixed paper used in the backer type is used as the intermediate base cloth, the penetration of PVC sol from the back surface is small and the interlayer strength does not appear, so that it cannot be used as the intermediate base cloth.

[0006] Recently, hot-melt fibers have been added to the surface layer of glass fiber-mixed paper to impart adhesiveness to vinyl chloride sol,
There has been an attempt to use a glass fiber-blended paper, which is mixed with rayon fiber on the back surface and has an interlayer strength, as an intermediate base cloth in order to improve the permeability of PVC sol from the back surface layer. However,
The glass fiber-mixed paper does not have a sufficient reduction in air permeability, and it is not possible to obtain a flooring material having a particularly desired surface flatness in recent years.

[0007]

DISCLOSURE OF THE INVENTION The present invention does not use the release paper which is required in the prior art, omits the sealing process, has a low cost, has a high production efficiency, and has a good surface flatness. An object is to provide an intermediate base cloth for a sandwich type cushion floor material.

[0008]

That is, the present invention provides a glass mixture obtained by combining two layers of at least a surface layer made of glass fiber, wood pulp and binder fiber and a back layer made of wood pulp, rayon fiber and binder fiber. A glass fiber-mixed paper coated with a resin composition containing a pigment and a binder on the surface of the paper making.
L-1096) is 3 cm / s to 8 cm / s and has a thickness of 210
μm to 260 μm, and the backside layer has a basis weight of 7 g / m ² to 1
A glass fiber-mixed paper for flooring use, characterized in that the resin composition contains 5 g / m ² of a resin composition containing a pigment and a binder on the surface of the glass fiber-mixed paper in solid content. A glass fiber-blended coated paper for flooring use according to claim 1, which is smeared with 5 g / m ² or more (claim 2). Further, at least two layers of a surface layer made of glass fiber, wood pulp and binder fiber and a back layer made of wood pulp, rayon fiber and binder fiber are combined into a glass-blended paper, which contains a pigment and a binder on the surface. Frazier air permeability of glass fiber mixed coated paper after coating with the coating liquid (JIS
L-1096) is adjusted to 3 cm / S to 8 cm / S by a gravure coater coating method, which is a method for producing a glass fiber-mixed paper for flooring (claim 3). The method for producing a glass fiber mixed coated paper for flooring use according to claim 3, wherein the coating liquid is transferred from the gravure roll to a plain roll and offset coating is performed (claim 4). Two layers, at least a surface layer made of glass fiber, wood pulp and binder fiber, and a back layer made of wood pulp, rayon fiber and binder fiber, are combined into a glass fiber mixed paper, and a coating containing a pigment and a binder on the surface. The glass fiber-mixed coated paper was coated with the liquid using a gravure coater so that the Frazier air permeability (JIS L-1096) of the glass-fiber-mixed coated paper was 3 cm / S to 8 cm / S. Then, a polyvinyl chloride sol is cured on the coated surface to form a polyvinyl chloride layer,
Thereafter, a polyvinyl chloride sol is applied from the back surface and cured, and the polyvinyl chloride layer on the back surface is adhered to the polyvinyl chloride layer on the front surface to be integrated with each other. Item 5).

[0009]

DETAILED DESCRIPTION OF THE INVENTION A detailed description will be given below. In the present invention, the process release paper is not used, the sealing process is omitted, and the present inventors have made diligent efforts as to what kind of intermediate base cloth should be able to obtain a cushion floor material having good surface flatness. As a result, by coating the surface layer of the glass fiber mixed paper having a two-layer structure with a resin composition that suppresses the permeation of vinyl chloride sol and has good adhesiveness with vinyl chloride sol,
The surface flatness was improved and adhesion with vinyl chloride sol was imparted. Further, by improving the permeation of vinyl chloride sol from the back surface layer of the glass fiber mixed paper, the vinyl chloride sol of the back surface layer penetrates into the surface layer and imparts interlayer strength. Therefore, we came up with the idea of glass fiber mixed coated paper in which Frazier air permeability, thickness, and basis weight of the back surface layer were specified.

The base paper glass fiber mixed paper on which the resin composition of the glass fiber mixed coated paper of the present invention is smeared will be described. The glass fiber mixed paper has a two-layer structure of at least a surface layer made of glass fibers, wood pulp and binder fibers and a back layer made of wood pulp, rayon fibers and binder fibers. The glass fiber imparts dimensional stability, the wood pulp imparts sealing and papermaking stability, the binder fiber imparts strength, and the rayon fiber plays a role of improving the penetration of the vinyl chloride sol from the back surface.

The glass fiber used in the present invention may be any glass fiber as long as it is hard to break and has a fiber sheet ability, but usually, the fiber diameter is 6 μm to 13 μm, and the fiber length is 6 mm to 25 mm.
Is appropriate. A glass fiber having a fiber diameter of less than 6 μm is expensive and costly, and a fiber diameter of more than 13 μm tends to make the sheet coarse and dense, resulting in poor flatness. In addition, it is preferable to use alkali-resistant E glass because it may be applied to the floor of concrete.

The wood pulp used in the present invention is NBK.
P, LBKP, NBSP, LBSP, GP, or any other type of pulp may be used, and it is not particularly limited, but NBKP is preferable from the viewpoint of sealing effect and strength impartment. The beating degree is preferably in the range of 300 to 600 CSF. Freeness is 30
If it is less than 0 CSF, the dimensional stability of the sheet tends to decrease, and if it exceeds 600 CSF, the strength tends to decrease.

The binder fiber used in the present invention is PV
Examples of the fibers include A fibers, PET fibers, and various core-sheath fibers, and PVA fibers are most suitable because they are wet papermaking because of their paper-making properties, wet paper strength, and adhesiveness with glass fibers. Binder fibers having a fiber diameter of 1 to 4 denier and a fiber length of 3 to 10 mm are preferably used. If it is less than 3 mm, the binder effect tends to decrease, and if it exceeds 10 mm, it tends to cause twisting and solidification during papermaking, which is not preferable.

The rayon fiber used in the present invention preferably has a fiber diameter of 1.5 to 4.0 denier and a fiber length of 5 to 10 mm. When the fiber diameter exceeds 4 denier, the flatness of the back surface of the sheet becomes poor and the fiber When the length is longer than 10 mm, it is not preferable because the paper is likely to be twisted or hardened during papermaking. The amount of rayon fibers in the back layer of the glass fiber mixed paper is 40 to 60% by weight.
However, if it is 40% by weight or less, clogging may occur and the permeability of the vinyl chloride sol may be deteriorated, and if it exceeds 60% by weight, the paper-making property tends to be unstable and the flatness of the back surface of the sheet tends to deteriorate.
Incidentally, other synthetic fibers such as PET fiber and vinylon fiber may be used in place of the rayon fiber, but rayon fiber is most suitable because it is easily fluffed and flatness is impaired.

The resin composition smeared on the glass fiber-mixed coated paper of the present invention will be described. The binder is preferably latex, which has high suppression of permeation of vinyl chloride sol and has good adhesiveness with vinyl chloride sol, and also has an effect of filling voids in the glass fiber mixed paper. Examples of the latex having good adhesion to polyvinyl chloride include polyvinyl chloride latex, styrene butadiene latex, acrylic latex and vinyl acetate latex. Among them, styrene-acrylic latex is optimal because it has good adhesiveness with vinyl sol and also has an effect of suppressing permeation of vinyl sol, and the interfacial adhesion strength between the base material and vinyl chloride becomes strong.

A pigment is added to the resin composition to physically fill it. Any pigment may be used as long as it has an affinity with the binder and does not cause the pigment to fall off after coating so as to retain the binder on the surface of the glass fiber mixed paper. For example, calcium carbonate, kaolin, titanium oxide or the like is used. From an economical viewpoint, calcium carbonate is preferred, but deramie clay is most preferred in consideration of resin film forming property, cost and the like. Since Deramie clay has a good film-forming property, it has a high effect of suppressing the back stain of the glass fiber mixed coated paper due to the excessive permeation of vinyl chloride sol. Therefore, the combination of styrene acrylic and deramie clay is most suitable.

The coating amount of the resin composition of the glass fiber-mixed coated paper of the present invention will be described. The surface of the glass fiber mixed paper is preferably coated with a resin composition containing a latex having good adhesion to polyvinyl chloride in a solid content of 5 g / m ² or more. Of the resin composition, it is preferable to apply a latex having good adhesion to polyvinyl chloride in a solid content of 1.5 g / m ² or more.

If the resin composition has a solid content of less than 5 g / m ² , the glass fiber-mixed paper surface is not sufficiently coated, and the effect of suppressing permeation of the vinyl chloride sol is insufficient, resulting in poor flatness after coating with vinyl chloride sol. Become a trend. When the latex having good adhesiveness to polyvinyl chloride has a solid content of less than 1.5 g / m ² , the interfacial adhesive strength between the vinyl chloride sol and the glass fiber-mixed paper tends to decrease.

In particular, a resin composition in which deramie clay and styrene acrylic latex are combined is coated on the surface of the glass fiber mixed paper in an amount of 5 g / m ² or more (of which styrene acrylic latex is 1.5 g / m ² or more). As a result, the coating of the glass fiber mixed paper surface becomes good and the penetration of the PVC sol is suppressed, the surface flatness after the PVC sol coating is improved and the interfacial adhesion between the PVC sol and the glass fiber mixed coated paper is improved. Give enough.

The method for coating the resin composition of the glass fiber-mixed coated paper of the present invention will be described. The coating method may be selected according to the coating amount by various coating methods such as an air knife coater and a blade coater, and the viscosity / concentration of the coating liquid, but on the surface of the porous glass fiber mixed paper, the resin composition is applied. As a result of investigating a method capable of efficiently coating the surface of the paper layer with a small amount, it was found that the gravure coater coating method is optimal. According to the gravure coater coating method, the viscosity of the coating liquid
It was found that the coating amount can be adjusted by adjusting the depth and roughness of the engraved cell of the gravure roll in addition to the concentration. Furthermore, the pressure during coating can be adjusted by combining with offset coating. Therefore, the resin composition can be effectively attached to the surface of the glass fiber mixed paper. Therefore, a glass fiber-blended coated paper having a small coating amount of the resin composition and an economical sealing effect can be obtained.

The Frazier air permeability and thickness of the glass fiber-blended coated paper of the present invention will be described. Frazier air permeability is a measure to control the permeability of PVC sol. Frazier air permeability is preferably in the range of 3 cm / s to 8 cm / s, 3 cm
If it is lower than / s, the eyes are clogged too much and the penetration of the vinyl chloride sol becomes insufficient, resulting in insufficient interlayer strength. On the other hand, if it exceeds 8 cm / s, the permeation of the vinyl chloride sol becomes too large and the surface flatness after coating the vinyl chloride sol is impaired.

The thickness of the glass fiber mixed coated paper is 2
The thickness is preferably in the range of 10 μm to 260 μm, and when the thickness is less than 210 μm, strike-through occurs from the front surface to the back surface of the vinyl chloride sol, resulting in process contamination and deterioration of surface flatness. 260 μm
When the thickness becomes thicker, the penetration of the vinyl chloride sol from the back surface does not reach the vinyl chloride sol coated on the surface layer and the interlayer strength becomes insufficient.

The mass of the back surface layer of the glass fiber mixed coated paper will be described. The basis weight of the back surface layer is preferably in the range of 7 g / m ^{2 to} 15 g / m ² . In the present invention, the surface layer is stopped as much as possible and the permeation of the vinyl chloride sol is appropriately suppressed to provide the surface flatness, and the back surface layer accelerates the permeation of the vinyl chloride sol as much as possible, thereby bonding the vinyl chloride sol of the surface layer and the vinyl chloride sol of the back layer. The point is to give interlayer strength by the anchor effect. If it exceeds 15 g / m ² , the vinyl chloride sol from the back surface does not reach the vinyl chloride sol of the surface layer, and the interlayer strength decreases. If it is less than 7 g / m ² , the stability of papermaking becomes poor at the time of papermaking of glass fiber-mixed papermaking, and defects are apt to occur and the flatness of the back surface is deteriorated.

[0024]

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 Glass fibers of 9 μm × 6 mm (manufactured by Asahi Fiber Co., Ltd.) were dispersed as follows. Water and dispersant Nonion NS2 in pulper
06 (manufactured by Nippon Oil & Fats Co., Ltd.) was added to 3 WET% of glass fiber and stirred, and then glass fiber was added and stirred for 15 minutes. After that, SN Dispersant 5034 (manufactured by San Nopco) as a dispersion stabilizer was added to 4 WET% of the glass fiber, followed by addition of a high molecular polyacrylamide aqueous solution acrypers (made of Diafloc) of 1.5% (solid) to the glass fiber, and a stirrer ( It was stored with stirring at Shimazaki Seisakusho.

NBKP Kamloops (freeness 470 ml) and PVA fiber VPB105- after beating in another pulper
1 × 3 (manufactured by Kuraray) was mixed and dispersed in water at a ratio of 66.7 / 33.3 and stored.

SBR Latex L-484 in a separate tank
0 (manufactured by Asahi Kasei) and calcium carbonate NS100 (manufactured by Nitto Koka) are mixed and dispersed in warm water (80 ° C.) at a ratio of 50/50, and polyamide epichlorohydrin resin Polyfix 201 (manufactured by Showa High Polymer) is used with SBR latex. 10%
It was stored after adding (solid) and aggregating. As the surface layer, the above glass fiber / NBKP / PVA fiber / SBR latex / calcium carbonate is 50/20/10/10/1.
The mixture was mixed at the inlet of the primary screen so as to be 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 side, beaten to pulper NBKP
Kamloops (Freeness 470 ml) and PVA fiber VPB
105-2 x 3 and polyester fiber 1.5 denier x 5 mm
(Manufactured by Teijin) was mixed and dispersed in water at a ratio of 80/15/5 and then stored and sent to a cylinder paper machine to form a web having a solid content of 10 g / m ² .

As described above, the front surface layer is 80 g / m ² and the back surface layer is 10 g / m ^2.
A glass fiber mixed paper having a m ² and a total basis weight of 90 g / m ² was made by a Fourdrinier / Cylinder / paper machine and a Yankee dryer.

Comparative Example 2 Dispersion of 9 μm × 13 mm glass fiber was carried out in the same manner as in Comparative Example 1 and stored.

Water and polyvinyl alcohol (PV
A) Poval 117 (manufactured by Kuraray Co., Ltd.) was mixed so as to have a concentration of 20%, and stirred for 30 minutes while heating (60 ° C. or higher) to prepare a PVA aqueous solution. Further, it was mixed with an aqueous PVA solution so as to have a solid content of 93/7 to prepare and store an aqueous solution having a concentration of 10%.

The above-mentioned glass fiber was used to produce a solid content of 4 by a Fourdrinier paper machine.
After being formed into a web of 5 g / m ² , a PVA aqueous solution was added to a solid content of 5
Impregnate with a g / m ² coater and dry with a hot air circulation dryer.
A glass fiber paper having a total basis weight of 50 g / m ² was produced by papermaking.

Comparative Example 3 Glass fibers 9 μm × 6 mm / glass fibers 6 μm × 6 mm (manufactured by Asahi Fiber Co., Ltd.) were dispersed in a pulper at a ratio of 50/50 in the same manner as in Comparative Example 1 and stored.

Beating with pulper NBKP / VPB105-
2 x 3 / polyethylene fiber SWP790 (Mitsui Chemicals)
Were mixed and dispersed at a ratio of 55/30/15 and stored.

The SBR latex / calcium carbonate was agglomerated and stored in a tank in the same manner as in Comparative Example 1 so that the ratio was 50/50.

As the surface layer, the above glass fiber / NBK
P / PVA fiber / polyethylene fiber / SBR latex / calcium carbonate are mixed at the primary screen inlet so as to be 53/15/8/8/10/10 and sent to a Fourdrinier paper machine to obtain a web with a solid content of 80 g / m ² . Configured.

As a back layer, beaten to pulper NBKP
/ VPB105-2 x 3 / Rayon fiber 1.5 denier x
After dispersing so that the ratio of 5 mm is 50/10/40,
A cylinder paper machine was used to form a web with a solid content of 10 g / m ² .

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

Reference Example 1 Glass fibers 9 μm × 6 mm were dispersed in a pulper in the same manner as in Comparative Example 1 and stored. Beated by another pulper NBKP /
They were mixed and stored in the same manner as in Comparative Example 1 so that the ratio of PVA fibers / was 67/33. As the surface layer, the above glass fiber / NBKP / PVA fiber / is 50/30/20
Was mixed at the inlet of the primary screen and fed to a Fourdrinier paper machine to form a web having a solid content of 65 g / m ² .

As the back layer, beaten NBKP / PVA fiber / Rayon fiber 1.5 denier × 5 mm 40/10/5
The mixture was dispersed and stored with a pulper so that the ratio was 0, and a web having a solid content of 10 g / m ² was constructed with a cylinder paper machine.

As described above, the surface layer is 65 g / m ² and the back surface layer is 10 g / m ² .
A glass fiber mixed paper having m ² and a total basis weight of 75 g / m ² was prepared.

Reference Example ² A web having a solid content of 65 g / m ² was formed in the same manner as in Reference Example 1 except that the ratio of glass fiber / beaten NBKP / PVA fiber was 35/45/20 as the surface layer. did. As the back layer, the solid content was 10 g / m ^{2 in the} same manner as in Reference Example 1.
Made up the web. As described above, a glass fiber mixed paper having a surface layer of 65 g / m ² , a back surface layer of 10 g / m ² , and a total basis weight of 75 g / m ² was prepared.

Reference Example 3 A web having a solid content of 65 g / m ² was formed in the same manner as in Reference Example 1 except that the ratio of glass fiber / beaten NBKP / PVA fiber was 65/20/15 as the surface layer. did. As the back layer, the solid content was 10 g / m ^{2 in the} same manner as in Reference Example 1.
Made up the web. As described above, a glass fiber mixed paper having a surface layer of 65 g / m ² , a back surface layer of 10 g / m ² , and a total basis weight of 75 g / m ² was prepared.

Reference Example 4 Surface layer 55 g / m ² , back surface layer 8 g / m ² , total basis weight 63 g / m ^2.
The glass fiber-blended paper of was prepared in the same manner as in Reference Example 1.

Reference Example 5 Surface layer 78 g / m ² , back surface layer 12 g / m ² , total basis weight 90 g /
A m ² glass fiber mixed paper was prepared in the same manner as in Reference Example 1.

Reference Example 6 Surface layer 65 g / m ² , back surface layer 20 g / m ² , total basis weight 85 g /
A m ² glass fiber mixed paper was prepared in the same manner as in Reference Example 1.

Reference Example 7 Surface layer 65 g / m ² , back surface layer 5 g / m ² , total basis weight 70 g / m ²
The glass fiber-blended paper of was prepared in the same manner as in Reference Example 1.

Reference Example 8 As the surface layer, the solid content was 65 g / m ^{2 in the} same manner as in Reference Example 1.
A web having a solid content of 10 g / m ² was formed in the same manner as in Reference Example 1, except that the rayon fiber was replaced by 4 denier × 6 mm as the back layer.
A glass fiber mixed paper having 5 g / m ² , a back surface layer of 10 g / m ² , and a total basis weight of 75 g / m ² was prepared.

Reference Example 9 As the surface layer, the solid content was 65 g / m ^{2 in the} same manner as in Reference Example 1.
A web having a solid content of 10 g / m ² was formed in the same manner as in Reference Example 1 except that the rayon fiber was replaced with 6 denier × 10 mm as the back layer. A glass fiber-mixed paper having m ² , a back surface layer of 10 g / m ² , and a total basis weight of 75 g / m ² was prepared.

Reference Example 10 As a surface layer, the solid content was 65 g / m ^{2 in the} same manner as in Reference Example 1.
Of the rayon fiber instead of 1.5 denier x 15 mm as the back layer, and a web having a solid content of 10 g / m ² was formed in the same manner as in Reference Example 1. A glass fiber mixed paper having 65 g / m ² , a backside layer of 10 g / m ² , and a total basis weight of 75 g / m ² was prepared.

Reference Example 11 Surface layer 65 g / m ² , back surface layer 7 g / m ² , total basis weight 72 g / m ²
The glass fiber-blended paper of was prepared in the same manner as in Reference Example 1.

Reference Example 12 Surface layer 65 g / m ² , back surface layer 15 g / m ² , total basis weight 80 g /
A m ² glass fiber mixed paper was prepared in the same manner as in Reference Example 1.

Tables 1 to 4 show Comparative Examples 1 to 3 and Reference Examples 1 to 12.
The composition and basis weight of the two layers of the front surface layer and the back surface layer are shown.

[0054]

[Table 1]

[0055]

[Table 2]

[0056]

[Table 3]

[0057]

[Table 4]

Example 1 60 parts of calcium carbonate (Softon 2200) and 40 parts of kaolin (ultra coat) were mixed with water, and 0.1% by weight of a dispersant (sodium hexametaphosphate) was added to the mixture.
After stirring for 0 minute, dispersed clay having a concentration of 70% was prepared and stored with stirring.

Polyvinyl alcohol (Poval 117)
Is mixed with water and stirred while heating (60 ° C) to obtain a concentration of 10
% Lysate was made and stored.

The above dispersion clay, PVA solution, and vinyl chloride latex (made by VINYBLANN 654 Nishin Kagaku Co., Ltd.) were mixed at a solid content of 89/4/7 / to obtain a concentration of 50.
% Coating solution was prepared. Further, 0.1% of a thickening agent sodium alginate (Kergin HV) was added to make a viscosity of 500 CPS (B-type viscometer), and the mixture was stored with stirring.

On the surface layer of the glass fiber-mixed paper prepared in Reference Example 1, the coating solution was coated with an air knife coater to obtain a solid content of 30.
g / m ² was applied to prepare a glass fiber mixed paper with a total basis weight of 105 g / m ² .

Example 2 Deramie Clay (NU Clay Engelhart Co.) was mixed with water, and a dispersant (sodium hexametaphosphate) was added to the mixture.
1% was added, and after stirring for 30 minutes, dispersed clay having a concentration of 65% was prepared and stored with stirring.

The above dispersed clay and styrene acrylic latex (manufactured by X-8887 Asahi Kasei) having a concentration of 48% were mixed at a ratio of 66.7 / 33.3, and a concentration of 5 was obtained.
Make a 0% coating liquid and add 0.1% thickener (Kergin HV).
% And added to have a viscosity of 500 CPS and stored with stirring.

The above coating liquid was applied to the surface layer of the glass fiber mixed paper prepared in Reference Example 1 by gravure coater offset coating to give a solid content of 10 g / m ² , and a total basis weight of 85 g / m ^{2 was} added to the glass fiber mixed paper. Created coated paper.

Example 3 The surface layer of the glass fiber mixed paper prepared in Reference Example ² was coated with a solid content of 10 g / m ² in the same manner as in Example 2, and the total basis weight was 8
A 5 g / m ² glass fiber mixed coated paper was prepared.

Example 4 The surface layer of the glass fiber mixed paper prepared in Reference Example 3 was coated with a solid content of 10 g / m ² in the same manner as in Example 2, and the total basis weight was 8
A 5 g / m ² glass fiber mixed coated paper was prepared.

Example 5 The surface layer of the glass fiber mixed paper prepared in Reference Example 4 was coated with a solid content of 10 g / m ² in the same manner as in Example 2, and the total basis weight was 7
A 3 g / m ² glass fiber mixed paper coated paper was prepared.

Example 6 The surface layer of the glass fiber mixed paper prepared in Reference Example 5 was coated with a solid content of 10 g / m ² in the same manner as in Example 2, and the total basis weight was 1
A glass fiber-blended coated paper of 00 g / m ² was prepared.

Example 7 The surface layer of the glass fiber mixed paper prepared in Reference Example 6 was coated with a solid content of 10 g / m ² in the same manner as in Example 2, and the total basis weight was 9
A 5 g / m ² glass fiber mixed coated paper was prepared.

Example 8 The surface layer of the glass fiber mixed paper prepared in Reference Example 7 was coated with a solid content of 10 g / m ² in the same manner as in Example 2, and the total basis weight was 8
A 0 g / m ² glass fiber-blended coated paper was prepared.

Example 9 The surface layer of the glass fiber mixed paper prepared in Reference Example 8 was coated with a solid content of 10 g / m ² in the same manner as in Example 2, and the total basis weight was 8
A 5 g / m ² glass fiber mixed coated paper was prepared.

Example 10 A surface layer of the glass fiber mixed paper prepared in Reference Example 9 was coated with a solid content of 10 g / m ² in the same manner as in Example 2, and the total basis weight was 8
A 5 g / m ² glass fiber mixed coated paper was prepared.

Example 11 The surface layer of the glass fiber mixed paper prepared in Reference Example 10 was coated with a solid content of 10 g / m ² in the same manner as in Example 2 to prepare a glass fiber mixed paper having a total basis weight of 85 g / m ^2. Created coated paper.

Example 12 The coating liquid prepared in the same manner as in Example 2 except that the mixing ratio of Deramie clay and styrene-acrylic latex was 85/15, was used to prepare the glass fiber mixed paper prepared in Reference Example 1. A solid content of 10 g / m ^{2 was} applied to the surface layer of Example 1 in the same manner as in Example 2 to prepare a glass fiber-mixed paper with a total basis weight of 85 g / m ² .

Example 13 The surface layer of the glass fiber mixed paper prepared in Reference Example 1 was coated with a solid content of 7 g / m ² in the same manner as in Example 2, and the total basis weight was 82.
A g / m ² glass fiber mixed coated paper was prepared.

Example 14 The surface layer of the glass fiber mixed paper prepared in Reference Example 11 was coated with a solid content of 10 g / m ² in the same manner as in Example 2 to give a glass fiber mixed paper having a total basis weight of 82 g / m ^2. Created coated paper.

Example 15 The surface layer of the glass fiber mixed paper prepared in Reference Example 12 was coated with a solid content of 10 g / m ² in the same manner as in Example 2 to give a glass fiber mixed paper having a total basis weight of 90 g / m ^2. Created coated paper.

Comparative Example 4 The surface layer of the glass fiber mixed paper prepared in Reference Example 1 was coated with a solid content of 4 g / m ² in the same manner as in Example 2, and the total basis weight was 79.
A g / m ² glass fiber mixed coated paper was prepared.

Comparative Example 5 The surface layer of the glass fiber mixed paper prepared in Reference Example 1 was coated with a solid content of 7 g / m ² in the same manner as in Example 12, and the total basis weight was 8
A 2 g / m ² glass fiber mixed coated paper was prepared.

Tables 5 to 8 show Examples 1 to 13 and Comparative Examples 4 to 5.
The constitution of the glass-mixed paper coated with is shown below.

[0081]

[Table 5]

[0082]

[Table 6]

[0083]

[Table 7]

[0084]

[Table 8]

Table 9 shows the thicknesses of the glass-blended papers and the glass-blended coated papers of Comparative Examples 1 to 5 and Examples 1 to 15 and the sealing effect.
The flatness after coating with PVC sol, the permeability of PVC sol, and the interlayer strength are shown.

The thickness was measured with a thickness gauge for non-woven fabric described in JIS L-1096. The larger the number, the thicker it is.

The sealing effect was measured by a Frazier air permeability tester (JIS L-1096). The smaller the number, the more the eyes are blocked.

A sandwich type cushion floor material using glass fiber mixed paper, glass fiber paper and glass fiber mixed coated paper as an intermediate base fabric was prepared by the following method. After the intermediate base cloth is cured at 120 ° C. for 1 minute, the intermediate base cloth is placed on a glass plate with the surface upward and the upper part is taped. The surface of the sample was coated with foamed polyvinyl chloride sol with an applicator bar with a gap of 0.4 mm, and it was heated with a circulating hot air dryer for 20 minutes.
The vinyl chloride sol was gelled by heating at 0 ° C. for 15 seconds. Place the sample with the coated side up on a glass plate, and apply a non-foaming polyvinyl chloride sol with a bar having a gap of 0.6 mm (the thickness of the non-foaming sol is 0.2 mm) at 200 ° C with the above dryer. -2
It was heated for a minute to foam. Place the sample with the back side up on the glass plate, and apply the foamed PVC sol for the back side with a bar with a gap of 0.6 mm,
It was foamed by heating at 180 ° C. for 2 minutes with the above dryer. By the above procedure, the sandwich type cushion floor material using the glass fiber mixed paper, the glass fiber paper, and the glass fiber mixed paper coated paper as the intermediate base fabric is prepared.

The evaluation of the surface flatness after coating with polyvinyl chloride sol is visually classified into grades 1 to 5 according to the degree of surface irregularities. Grade 1 is the best and Grade 5 is the worst.

The evaluation of the PVC interlayer strength of the cushion floor material is as follows.
The flooring material with a width of 50 mm was measured for peel strength with a Tensilon tensile tester. If the strength was 3.0 kg or more, it was rated as O, and if less than 3.0 kg, it was rated as X. The interlayer strength of 3 kg / 50 mm or more is based on the empirical rule of strength normally required for cushion floor materials.

A comparison of the permeability of PVC sol into the intermediate base fabric was carried out by the following method. Glass fiber mixed paper or glass fiber mixed coated paper is dried with a circulating hot air dryer at 160 ° C for 1 minute and cooled with a desiccator, and then the basis weight (A) and thickness (B) are measured, and the gap is 0.4 mm. Apply polyvinyl chloride sol at a bar of 160 ℃
It gelled by heating for 1 minute. (Perform the above work separately for the front surface and the back surface) The basis weight (C) and thickness (D) of the above sample are measured, and the permeation amount of vinyl chloride sol (g / m ² ) is determined by the following formula. C-[(D-B) x PVC sol specific gravity (assumed to be 1.3) +
A] The smaller the numerical value obtained by the above formula, the less penetration, and the larger the numerical value, the more penetration.

[0092]

[Table 9]

Comparative Example 1 is a backer type glass fiber mixed paper. Since the back surface layer is clogged, the penetration of PVC sol from the back surface is small and the interlayer strength is 1.5 kg / 50.
Weak with mm.

Comparative Example 2 is a glass fiber paper, which has a high fragile content and a large amount of permeation of the vinyl chloride sol, so the vinyl chloride sol comes out to the opposite side, and the glass plate is dirty and the surface quality is poor. A blinding process is required.

Comparative Example 3 is a glass fiber mixed paper having a surface mixed with hot-melt fibers, and has good interlaminar strength, but the surface quality cannot be expected to improve.

Example 1 is a glass fiber mixed paper coated with a coating solution mainly composed of calcium carbonate and vinyl chloride latex, and the surface quality is improved but the coating amount is increased to 30 g / m ² .

Example 2 is a glass fiber mixed paper coated with a coating liquid mainly composed of deramie clay and styrene-acrylic latex, which has a good coating quality with a small coating amount of 10 g / m ² The strength is also strong.

Examples 3 to 4 show the effect of breathability (Fragile). In Example 3, the Frazier 2 and the eyes were clogged too much, the permeation of the vinyl chloride sol was small, and the interlayer strength was weakened. In Example 4, the eyes of Frazier 10 were too bright, and the permeation of PVC sol increased, resulting in poor surface quality.

Examples 5-6 show the effect of thickness. In Example 5, the thickness was 200 μm, which was too thin, and the vinyl sol escaped to the opposite side, resulting in poor surface quality. Example 6 has a thickness of 280μ
The thickness becomes too thick, and the penetration of the vinyl chloride sol from the back surface is not sufficient and the interlayer strength becomes weak.

Examples 7 to 8 and Examples 14 to 15 show the influence of the basis weight of the back surface. In Example 7, the back side has a basis weight of 20 g /
Since it is heavy with m ^2, it becomes thick, and the penetration of PVC sol from the back surface is not sufficient and the interlaminar strength becomes weak. In Example 8, since the basis weight of the back surface was as small as 5 g / m ² , peeling from the cylinder was uneven and the back surface was uneven, resulting in poor surface quality. In Examples 14 and 15, the surface quality is good and the interlaminar strength is also strong, so that it is clear that the basis weight of the back surface is suitably 7 g / m ^{2 to} 15 g / m ² .

Examples 9 to 11 show the influence of the thickness and length of rayon fibers. In Example 10, the back surface becomes rough because it is thick as 6 denier, and the permeation of the vinyl chloride sol increases, so the surface quality becomes poor. Since the length in Example 11 is as long as 15 mm, a lump of fibers is generated during papermaking and the back surface becomes uneven, resulting in poor surface quality. The rayon fiber having a thickness of 4 denier and a length of 6 mm in Example 9 had no effect and the surface quality was not deteriorated.

Examples 12 to 13 and Comparative Examples 4 to 5 show the influence of the coating amount and the binder amount. The interlayer strength of Example 12 was 3.0 kg / 50 mm, but it was 2.5 kg / 50 mm in Comparative Example 4 and 2.0 kg / 50 mm in Comparative Example 5, which is weak and requires a binder amount of 1.5 g / m ^2. I understand. In Example 13, the coating amount was 7 g / m ² and the surface quality was 3, while in Comparative Example 4, the coating amount was 4 g / m ² and the surface quality was 4. Therefore, the coating amount was 5 g / m ² or more. Is desirable.

[0103]

According to the present invention, at least glass fiber,
The surface of a glass fiber mixed paper obtained by combining two layers, a front layer made of wood pulp and binder fiber, and a back layer made of wood pulp, rayon fiber and binder fiber, contains a latex having good adhesion to polyvinyl chloride. The resin composition was coated by the gravure coater offset coating method at 5 g / m ² or more (of which the binder amount was at least 1.5 g / m ² ) and had a Frazier air permeability of 3 to 8 cm / S and a thickness of 210 to 260 μm.
The sandwich type cushion floor material produced by using this as an intermediate base fabric by using a glass fiber mixed coated paper characterized in that the backside layer has a basis weight of 7 to 15 g / m ² It is possible to obtain an economical product which does not require a paper and a sealing process and is excellent in surface flatness after coating with PVC sol.

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Claims (5)

(57) [Claims] 1. A pigment and a binder are provided on the surface of a glass fiber mixed paper obtained by combining two layers of at least a surface layer made of glass fiber, wood pulp and binder fiber and a back layer made of wood pulp, rayon fiber and binder fiber. A glass fiber mixed paper coated with a resin composition containing,
Frazier air permeability (JIS L-1096) is 3 cm / s ~
8 cm / s, thickness is 210 μm to 260 μm, and the basis weight of the back surface layer is 7 g / m ^{2 to} 15 g / m ² , glass fiber mixed paper for flooring applications . 2. The glass fiber-mixed paper for flooring use according to claim 1, wherein a resin composition containing a pigment and a binder is smeared on the surface of the glass fiber-mixed paper at a solid content of 5 g / m ² or more. 3. A glass fiber-mixed paper is prepared by combining two layers, at least a surface layer made of glass fiber, wood pulp and binder fiber, and a back layer made of wood pulp, rayon fiber and binder fiber, and a pigment on the surface thereof. Frazier air permeability (JIS L-1096) of the glass fiber-mixed paper coated with a coating liquid containing a binder and a binder is 3 cm / s to 8
A method for producing a glass fiber-blended coated paper for flooring applications, which comprises adjusting the gravure coater coating method to be cm / s. 4. The method for producing a glass fiber-blended coated paper for flooring according to claim 3, wherein the coating liquid is transferred from a gravure roll to a plain roll and offset coating is performed. 5. A glass fiber-mixed paper is prepared by combining two layers of at least a surface layer made of glass fiber, wood pulp and binder fiber and a back layer made of wood pulp, rayon fiber and binder fiber, and a pigment on the surface thereof. Frazier air permeability (JIS L-1096) of the glass fiber-mixed paper coated with a coating liquid containing a binder and a binder is 3 cm / s to 8
It is coated with a gravure coater so that it becomes cm / s, and it becomes a glass fiber mixed paper coated paper, and then polyvinyl chloride sol is coated on the coated surface and cured to form a polyvinyl chloride layer, and then the back surface. A method for manufacturing a cushion type flooring material of a sandwich type, characterized in that a polyvinyl chloride sol is further applied and cured to bond the polyvinyl chloride layer on the back surface to the vinyl chloride layer on the front surface so as to be integrated.