JPS58191300A - Lining paper for vinyl chloride sol coating - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an impregnated paper used as a backing material for wall materials, flooring materials, etc., and its purpose is to provide a backing paper with an excellent surface property of a dilated vinyl sol coat layer. That's true.

In recent years, asbestos paper or glass fiber paper is used as the A nail material, the backing material is coated with a vinyl sol containing a foaming agent, and after printing, a transparent coat layer is provided and the material is foamed with a trowel. The resulting foamed sheets are widely used as wall and flooring materials. However, problems with asbestos paper have been pointed out, including poor beer-up properties during re-application (if used, all or part of the asbestos paper remains, which is difficult to remove) and cracking due to poor folding durability. In addition, there are concerns about health management issues.

Glass fiber paper #'i also had poor surface properties.

Due to its low density, the vinyl chloride sol penetrates into the interior of the glass fiber paper. Therefore, an excessive amount of vinyl chloride is required to obtain a sol coat layer of a constant thickness. Furthermore, glass fiber paper has poor application accuracy (poor adhesion with false edges and corners) and is #1 for skin! It has the disadvantage of being tingling when used on i1n.

The present inventors have conducted extensive research to improve the drawbacks of such asbestos paper and glass zelkova fiber paper.

The present invention has led to the invention of an impregnated paper that is most suitable as long paper for vinyl chloride sol coating.The present invention consists of 5 to 30 parts of glass fiber or/and synthetic sapon koji and 95 to 70 parts of cellulose fiber. The fibers are made of 10 to 50 inches (by weight) of coniferous wood. *The gist is to impregnate a base paper made by mixing miscellaneous components with -molecular emulsion, and to adjust the resin content in the impregnated paper to 20 to 5 parts by weight.

Generally, when impregnating cellulose fibers with latex, it is necessary to select cellulose fibers with good impregnation properties, and for this purpose, pulp made from hardwood or sulfuric acid bulbs are selected.

However, these valves are weak in g1 degree.

When impregnated paper prepared using this as a raw material is coated with vinyl chloride sol, some of the cellulose fibers on the surface layer of the impregnated paper are torn off by the tension generated by the sol and brought into the coating layer, forming protrusions. They form fluff and protrude from the surface of the coating layer, impairing the surface properties of the coating layer and greatly reducing the 1llII value of the product.

In order to prevent this, the method of coating the surface of impregnated paper with a one-molecule emulsion or one molecule of water-soluble material may be considered, but this method increases the amount of doffing in the production of impregnated paper. Manufacturing costs are prohibitive.

According to the present invention, there is no need for polymer emulsion or coating with water-soluble molecules as described in F above, which is advantageous in terms of process control and manufacturing cost in the production of immersed paper.

In the present invention, when making the base paper, it is necessary to include 10 to 50 parts by weight of NKP as cellulose fibers! It is. That is, by blending NKPi, the suitability for vinyl chloride sol coating is significantly improved.

However, if the NKP formulation I is less than 10 parts by weight, the improvement effect will be small, and the more it is, the greater the effect will be.

When the amount of NKP added is 50 parts by weight or more, impregnating properties deteriorate. For this reason, various treatments such as lengthening the residence time in the impregnating bath and lowering the viscosity are required, which complicates process control, so the amount of NKP blended is preferably 50 parts by weight or less.

In the present invention, the purpose of blending glass fiber and/or synthetic fiber as a fiber component is to impart water resistance (dimensional stability in water) to the backing paper.

For this reason, it is necessary to have at least 5 coulometric parts DJ of all the fiber components, and the larger the content, the better the dimensional stability will be.

At 30 parts, it reaches a 9 sum point, and after 24 hours of water immersion, the stiffness is below 0.1%. Therefore, there is no advantage in terms of water resistance even if the content is more than n, and when glass fiber is blended, it gives a tingling sensation when it comes in contact with the skin, so the content must be 80 parts by weight or less.

The synthetic fibers that can be blended in this book are acrylic 1).

Modaacrylic, vinylon, polyethyl, nylon, polyethylene, polypropylene, vinyl chloride.

There are salts such as hibinylidene and boricral.

Purpose 1 of blending the molecular emulsion in the present invention
Well, the characteristics of Hakuuchi paper, especially its tensile strength and tearing properties.

The objective is to increase the n1it folding degree and interlayer peel strength.

For this reason, it is preferable to mix one molecule emulsion silane so that the resin content in the impregnated paper 1 is 20 to 50 parts by weight. , nitrile butadiene rubber (N)3), methyl methac1), nitrile butadiene rubber (MHR), vinegar! vinyl.

Ethylene-vinyl acetate (hereinafter referred to as 14VA).

Examples include ethylene-vinyl acetate-vinyl chloride (hereinafter referred to as EVAVC), acrylic acid ester, chlorograne latex, or mixtures thereof.

In addition, water-soluble resins such as polyamide, melamine, and urea may be blended as binders other than pot molecular emulsion in the papermaking process or in the impregnation process.In the backing paper of the present invention, titanium dioxide, titanium dioxide, Non-contact fillers such as clay and talc, pigments, sizing agents, vulcanizing agents, anti-aging agents,
A retardant and a fungicide may be added during the papermaking process or the impregnation process.

The lining paper of the present invention does not contain asbestos.

9 things like pneumoconiosis that cannot be avoided with asbestos paper! There is no fear of damage, it has much better folding durability than asbestos paper and glass fiber paper, and it also has stronger surface strength and higher optical density and smoothness than glass fiber paper. Very good coating suitability. For this reason, it is excellent as a backing paper for wall and flooring materials that are highly water resistant.

The invention will be illustrated by way of a sublunar example.

Examples 1 to 5 A small amount of sulfuric acid was added to a slurry consisting of 20 parts by weight of glass fiber, 80 parts by weight of NBKP (bleached softwood kraft pulp), and 50 parts by weight of LHKP (bleached kraft pulp), and a non-woven sheet was prepared. Tsubo using the machine! 5o
A handmade paper of f/- was prepared.

This handmade paper was impregnated with each S polymer emulsion.

The resin content in the impregnated paper was 30 parts by weight. The excellent physical properties of the impregnated paper were measured and the results shown in Table 1 were obtained. It was sufficiently strong against the surface toughness of these impregnated papers, and the surface properties of the coated layer after coating with vinyl chloride sol were good. There is almost no elongation after 24 hours of immersion in water, and the water resistance and dimensional stability are extremely good.

[Margin below]

Comparative Example 1 A small amount of sulfuric acid band was added to a slurry consisting of 20 parts by weight of gaff fibers, 40 parts by weight of NBSP (softwood bleached sacrificial sulfate pulp), and 40 parts by weight of LBKP.

Handsheet paper having a basis weight of 50 f- was prepared using a handsheet machine. This handmade paper was impregnated with 88R so that the resin content in the impregnated paper was 80 parts by weight.

The physical properties of the obtained impregnated paper were measured, and the results shown in Table 1 were obtained.

The surface strength of this impregnated paper is weak, and when it is coated with vinyl chloride sol, a large amount of fuzz is generated within and on the coated layer.

Example 6 A small amount of sulfuric acid was added to a slurry consisting of 10 parts by weight of acrylic fibers, 50 parts of NUKP (softwood unbleached kraft pulp) and 11 parts of LUKP4011.
In addition, )・Tsubo t101Q using a sheet machine
A handmade paper was created. This handmade paper is impregnated with MBR,
The 88R solid molecules in Impregnation 1 were 40 parts by weight.

The surface strength of the obtained f′L immersed paper (JIS P81.29
(by the wax method) was 22A, which was extremely thick. When this impregnated paper was coated with 100% vinyl sol, the surface properties of the coated layer were good.

Example 7 Glass fiber 10 vehicle inspection department, NBKP15 &! Part 1.

Solid content of slurry consisting of 1 part of LBKP75i and 1 part of LBKP75i
00 parts by weight to 5 parts by weight of titanium dioxide.

Prepare the raw material by adding 05 parts of polyamide resin and a small amount of 4A acid band. Using this raw material, 1 tsubo IA-601'tt? I am sorry for the inconvenience. MB on this paper
When R was impregnated using an impregnating machine and the impregnated paper was coated, the surface properties of the coated layer were 1-1.

Patent applicant: Kojin Co., Ltd.

Claims (1)

[Claims] Consisting of 5 to 30 parts by weight of glass fibers or/and synthetic fibers and 95 to 70 parts by weight of cellulose fibers. A base paper made by mixing a fiber component in which 10 to 50 inches (weight ratio) of the cellulose edge is kraft pulp made from softwood is impregnated with polymer emulsion to reduce the resin content in the impregnated paper to 20 to 50. Backing paper for salt vinyl sol coating in parts by weight.