JPS6081378A - Condensation-proofing vinyl wall covering - Google Patents

Abstract

PURPOSE:To provide the titled wall covering free from the formation of wrinkles caused by the elongation of the substrate nor the generation of mold in the paste, and usable for a long period without causing the surface waviness and peeling, by providing a water-impermeable layer between the substrate and the foamed layer composed mainly of a vinyl chloride resin and containing a highly water-absorbing polymer. CONSTITUTION:The objective wall covering is composed of (A) a foamed layer made of a resin composition consisting of (i) a vinyl chloride resin, (ii) a highly water-absorbing polymer having an average particle diameter of <=100mu, preferably <=50mu and capable of absorbing >=30 times weight of water based on own weight, and (iii) a plasticizer, (B) a substrate (e.g. paper, cloth, nonwoven cloth, wood plate, etc.) and (C) a water-impermeable layer, preferably a non-foamed vinyl chloride resin having high adhesivity to the foamed layer and excellent moldability, between the foamed layer A and the substrate B. The highly water-absorbing resin is a polyelectrolyte containing carboxylic acid salt and having crosslinked structure, preferably a saponified copolymer of a vinyl ester and an ethylenic unsaturated carboxylic acid (derivative). The amount of the water-absorbing polymer is 5-150pts.wt. per 100pts.wt. of the vinyl chloride resin.

Description

[Detailed description of the invention] The present invention relates to a vinyl wall material for preventing dew condensation.

More specifically, it is an object of the present invention to provide a vinyl wall material that prevents the generation of water droplets due to dew condensation and has anti-scratch properties. Many interior materials, such as wallpaper and ceiling coverings, are made of paper, cloth, or non-woven fabrics processed with resin, or processed plastic sheets themselves. For example, wall materials made by processing paper, cloth, or non-woven fabric with vinyl chloride resin have strong tensile and tear strength, are water resistant, and have the advantage of being easy to wipe off dirt. Since then, it is now used not only in living rooms, but also in closets, kitchens, and toilets. However, because this wall material has poor hygroscopicity, water can condense on the surface of the wall material and form water droplets due to a large wettability difference between indoors and outdoors, or sudden changes in room temperature or humidity. It has the disadvantage of being When moisture condenses on the surface, problems such as stains and mold growth occur. In addition, condensation on the walls of a closet in a residence can cause futons to become damp, making it uncomfortable and unsanitary.

As a way to improve the drawbacks of wall materials made by processing paper, cloth, or non-woven fabric with vinyl chloride resin, we have already applied paste vines made of super absorbent polymer, vinyl chloride resin, plasticizer, and foaming agent to paper. It was discovered that foamed paper, which was foamed by heating after coating, had high water absorption and water retention properties, and proposed the use of this foamed paper as a wall material to prevent condensation. 56-88082).

However, although the above wall materials are highly effective in preventing dew condensation, some of the moisture absorbed by the foam layer transfers to the backing base and the adhesive used to attach the wall materials, and This has the disadvantage that the base material stretches, causing sagging or wrinkles on the surface of the wall material that has been neatly pasted, and that the glue material grows mold or rots and deteriorates.

In view of the above-mentioned circumstances, the inventors of the present invention have conducted extensive studies on vinyl chloride wall materials that prevent the generation of water droplets due to dew condensation, and have found that the gap between the foam layer, which is mainly made of vinyl chloride resin containing a superabsorbent polymer, and the substrate. A water-impermeable layer is provided on the wall material of the present invention.1 The wall material of the present invention does not wrinkle due to the stretching of the base material, does not develop mold on the adhesive material, and does not peel off from the wall material even if used for a long period of time. Heading: The present invention was completed.

That is, the present invention relates to a resin composition foam made of a synthetic resin mainly composed of vinyl chloride resin, a superabsorbent polymer, a plasticizer, and other auxiliary agents, and a vinyl wall for preventing condensation made of a base coated with the foam. It is an object of the present invention to provide a vinyl wall material for preventing dew condensation, which is characterized in that a water-impermeable layer is provided between a foam layer and a substrate.

Since the vinyl wall material of the present invention is a resin foam containing a super absorbent polymer in the part that comes into contact with the outside air, when the temperature of the wall becomes below the dew point of the air that comes into contact with it and the water vapor in the air becomes condensed water, It is quickly absorbed into the resin and retained within the super absorbent polymer. Therefore, dew condensation is prevented.

Since the resin layer is made of foam, condensed water is absorbed into the resin very quickly, and the condensation prevention effect is excellent.

Furthermore, since the vinyl wall material of the invention has a water-impermeable layer between the foam layer and the base material, absorbed water does not penetrate into the base material, and the elongation of the base material and the deterioration of the glue material due to moisture are virtually eliminated. do not have.

Therefore, the wall material of the present invention has the advantage that when used by pasting it on a wall surface, it can remain in a neatly pasted state for a long period of time.

The superabsorbent polymer used in the resin composition foam of the vinyl wall material of the present invention absorbs water and swells from several times to several thousand times, retaining water but not dissolving in water. It can be anything. However, when the amount of water absorbed is less than 80 times its own weight, the amount of superabsorbent polymer added to absorb the condensed water becomes large, causing a decrease in mechanical strength such as tension and tearing of the vinyl wall material. It is preferable that the water absorption amount of the superabsorbent polymer used is 30 times or more. There are no particular limitations on the shape or particle size, but from the viewpoint of processability and physical properties of vinyl wall materials, it is desirable that the particle size be as fine as possible, and the average particle size should be 100μ or less, preferably 50μ or less. .

Examples of the superabsorbent polymer of the present invention include γ, a saponified product of a graft copolymer of starch and acrylonitrile, a dalat copolymer of starch and acrylic acid (salt), a salt of a copolymer of styrene and maleic anhydride, A crosslinked product of a salt of isobutylene and maleic anhydride copolymer, a crosslinked polymer of acrylic acid and/or an acrylate (e.g., a self-crosslinked polymer, a crosslinked polymer obtained by polymerization in the coexistence of a crosslinking agent, or a post-polymer polymer) cross-linked products), salts of reaction products of polyvinyl alcohol and maleic anhydride, graft copolymers of polyvinyl alcohol and acrylic acid (salts), copolymers of vinyl esters and ethylenically unsaturated carboxylic acid salts or their derivatives. Saponified products, saponified products of copolymers of vinyl esters and unsaturated polycarphonic acids or their derivatives, polyvinyl alcohol crosslinked products, polyethylene glycol 2 crosslinked products, carboxymethylcellulose crosslinked products, polyvinylpyrrolidone crosslinked products,
Known super absorbent polymers include crosslinked polyacrylamide, saponified polyacrylonyl-lyl, and mixtures thereof. Among them, it is desirable to use a superabsorbent polymer made of a polymer electrolytic chamber containing a carboxylate salt having a crosslinked structure because it has a high water absorption capacity and excellent strength after water absorption. Especially vinyl ester <X)
and ethylenically unsaturated carboxylic acid or its derivative (Y)
The saponified copolymer, which is mainly composed of This is preferable because the dew condensation prevention effect of the dew condensation prevention wall material using the highly conductive polymer is maintained for a long period of time. The amount of the super absorbent polymer added is in the range of 1 part to 200 parts per 100 parts of the vinyl chloride resin. If the amount of superabsorbent polymer added is less than 1 part, the moisture absorption is low and dew condensation can be sufficiently prevented. If the amount added is more than 200 parts, the strength as a wall material will be lacking. . Therefore, it is used within the above range, preferably from 5 parts to 15 parts.
Used in the range of 0 parts.

The vinyl chloride resin used as the resin composition foam for the vinyl wall material of the present invention is a vinyl chloride polymer, a vinyl chloride copolymer, or a mixture thereof, and is obtained by a polymerization method such as suspension polymerization or emulsion polymerization. Any commonly used material may be used, and there are no particular limitations. Furthermore, various beak modifiers such as P
MMA, MB8. , ABS, EVA, etc. may also be added.

Although ordinary plasticizers are used to add vinyl chloride resin, it is preferable to use an organic phosphoric acid plasticizer in combination for flame retardancy. These plasticizers include dioctyl phthalate, phthalate esters, adipic acid 2
- Fatty acid dibasic esters such as ethylhexyl and dioctyl sepatate, epoxidized soybean oil, epoxidized linseed oil, epoxides such as dioctyl epoxy hexahydrofucrate, poly(propylene adipate), poly(1,3-butylene sebacate), coethylene These include dihydric alcohol esters such as phthalylglyl-11-ol, chlorinated paraffin, and the like. Examples of organic phosphoric acid plasticizers include tricresyl phosphate, cresyl phenyl phosphate, monooctyldiphenyl phosphate, trioctyl phosphate, triphenyl phosphate, tributoxyethyl phosphate, and triphthyl phosphate. The amount of plasticizer used is in the range of 30 to 150 parts per 100 parts of vinyl chloride resin, and any proportion within this range can be used depending on the purpose. Furthermore, commonly used adjuvants may be added to the vinyl chloride resin constituting the vinyl wall resin of the present invention, if necessary. The addition ratio can be varied depending on the desired product. Examples of such auxiliary agents include stabilizers, inorganic fillers such as charcoal and clay, pigments, diluents, flame retardants, and fungicides.

The resin composition foam of the vinyl wall material of the present invention is produced by heating the paste while mechanically creating air bubbles by blowing gas or steam into the paste containing the above-mentioned raw materials or by stirring. A method of adding and mixing a foaming agent that decomposes by heating and generating gas to the above raw materials and foaming at the same time as heating and gelling, or a method of further heating and foaming at a high temperature after heating and gelling. In general, any method for producing vinyl chloride resin foam can produce a foam with uniform force distribution, strong strength, and good finished appearance. This is preferred as a method for obtaining a foam. The blowing agents used are apricarbonamide, azobisisobutyronitrile, dinitrosopentamethylenetetramine, paratoluenesulfonyl hydrazide, 4.4
Examples include organic blowing agents such as '-oxybisbenzenesulfonylhydrazinode, and inorganic blowing agents such as sodium bicarbonate, ammonium carbonate, ammonium bicarbonate, azide compounds, and sodium borohydride. The amount of the blowing agent added is in the range of 1 part to 30 parts per 100 parts of the arsenic resin. .

You can use boards etc. The water-impermeable layer provided between the foamed New Year's visit composition and the substrate includes non-foamed vinyl chloride resin, thermoplastic polyurethane resin, acrylic resin, 1":VA4kl (fat, vinyl acetate resin, Any material such as polyamide resin that does not permeate clean water and has good adhesion to vinyl chloride resin can be used, but it has particularly good adhesion to vinyl chloride resin foam, making it suitable for molding. It is preferable to provide a layer made of non-foamed vinyl chloride resin, which is easy to process.

The vinyl chloride resin foam constituting the vinyl wall material of the present invention may be obtained by any of the paste processing method, calendar processing method, and extrusion processing method. There are also methods for providing a water-impermeable layer between the foam and the substrate, such as forming a vinyl chloride resin foam on a substrate coated with a water-impermeable layer, and forming a water-impermeable layer on a substrate coated with a water-impermeable layer. A method for integrating a surface and a vinyl chloride resin foam, a method for integrating a water-impermeable surface of a vinyl chloride resin foam having a water-impermeable layer with a substrate, and a method for integrating a vinyl chloride resin foam and a substrate into a seven-piece structure. At the same time, a suitable method such as a method of forming a water-impermeable layer on the adhesive m1 is carried out. As an example of the embodiment of the method for producing vinyl wall materials of the present invention, when a paste processing method is used, non-foaming vinyl chloride plastisol containing no foaming agent is used to fabricate navy blue, woven fabric, knitted fabric, non-woven fabric, etc. After applying a thin film of a certain thickness to the substrate using the doctor knife method, roll coating method, etc.,
Heat for 1 part second to 5 minutes at 0.degree. C. to gel the frustisol. Thereafter, on the substrate coated with the non-foamed vinyl chloride resin layer, vinyl chloride blastisol containing a highly water-absorbent high strength element, a foaming agent, and other auxiliary agents was further applied in the same manner as above, and heated at 180°C to 250°C. By heating and foaming for 30 seconds to 5 minutes, the vinyl wall material for preventing dew condensation of the present invention having a non-foamed vinyl chloride resin layer between the base and the foam layer can be obtained.

When using the wall material of the present invention to prevent condensation on the wall of room FF3, the wall of the closet, etc., the wall material should have an appropriate thickness. Easy to understand! This is because, as described above, the dew condensation prevention effect of wall materials, that is, their water retention capacity, differs depending on how buried they are. The required thickness for the wall material is 0.1 to B, and 03 to 1.5 is suitable.

The vinyl wall material of the present invention is capable of many modifications, both in construction and manufacturing method. For normal wall material products, such as applying appropriate surface treatment, patterning, and embossing on the surface of A7, and applying adhesive to the back and applying release paper. Everything that is done can be taken in. Embossing is especially effective because it increases the surface area and creates a shape that absorbs moisture easily.

In addition, when performing surface treatment or patterning, it is preferable to use a mesh roll or the like to perform the treatment, since applying a treatment agent to the entire surface may form a film and reduce water absorption.

By using the vinyl wall material for preventing condensation of the present invention,
Even during humid times such as the rainy season, condensation t, y: Moisture is absorbed by the vinyl chloride resin foam layer that makes up the wall material, and no water droplets appear on the surface, completely preventing condensation. Ru. Furthermore, in the vinyl wall material for preventing dew condensation of the present invention, water is absorbed by the polyvinyl chloride resin foam layer and the moisture does not transfer to the backing substrate, which prevents stretching of the substrate due to moisture, growth of mold, and deterioration of the glue material due to rot. As a result, the adhesive remains neatly stuck for a long period of time. First, the vinyl wall material of the present invention rapidly absorbs moisture under high humidity and releases moisture under low humidity, which is the so-called +1i property, so it can be used for the purpose of humidity control in small rooms etc. You can also do it.

As detailed above, the vinyl wall material for preventing condensation of the present invention is not only used as a wall covering material for walls and ceilings of living rooms, kitchens, toilets, bathrooms, washrooms, closets, etc., but also for containers, etc. It can also be used as a wall material to prevent condensation on the inner walls of buildings. The wall material for preventing dew condensation of the present invention will be further explained below with reference to Examples, but the present invention is not limited thereto.

Examples 1 to 2 Lauroyl peroxide o, ty was added as a polymerization initiator to vinyl acetate 60f and methyl acrylate 40, and partially saponified polyhinyl alcohol-JvB9- and NaC1!1 were prepared.
The mixture was stirred and dispersed in 300 liters of water containing 0 F, and suspension polymerized at 65°C for 6 hours. This copolymer 86y-2001
methanol and water loz and 5N NaOH aqueous solution 4
The suspension was suspended in a saponification solution consisting of 0- and saponification reaction was carried out at 25°C for 1 hour and then at 65°C for 5 hours. After thorough washing with methanol, dry under reduced pressure to obtain a saponified product with an average particle size of 200μ (water absorption capacity of 700 Vfl-)
I got it. This was pulverized by a jet mill to obtain a finely powdered superabsorbent polymer with a particle size of 60μ or less.9゛ Using this superabsorbent polymer and vinyl chloride resin, the formulations shown in Table 1 were mixed and stirred using a Tesper. A uniform paste-like vinyl chloride plastisol composition for the foam layer was prepared.

Table 1 On the other hand, the azocicabonamide and the superabsorbent resin were removed from the above formulation and the mixture was made into a paste in the same manner to prepare a non-foamable vinyl chloride plastisol. Next, apply the above non-foaming vinyl chloride blastisol on the paper material.
Knife coating at t m thickness followed by 150°C;
Heat 1 cup for 30 seconds to gel. Furthermore, the above-mentioned vinyl chloride plastisol for the foam layer was coated in the same manner at a thickness of 0.2 layers, heated and foamed at 220°C for 1 minute, and embossed with an embossing roll to obtain a vinyl wall material. Example 1 A foamed layer having the formulation of Example 2 was compounded in the same manner as in Example without coating the paper with a non-foamed vinyl chloride layer in advance to obtain a vinyl wall material according to the prior art.

Comparative Example 2 The composition of Example 2 except that the superabsorbent polymer was removed in advance was made into a paste in the same manner as in the example, coated on paper, and heated and foamed to obtain a vinyl wall material.

Comparative Example 3 The formulation of Example 2 except that azosicabonamide was removed in advance was made into a paste in the same manner as in the example, and the paste was coated on paper and heated to melt to obtain a vinyl wall material.

Practical test l The vinyl wall materials of Example 1.2 and Comparative Example 1.2.3 were tested at an indoor temperature of 35°C, a relative humidity of 1190%, and a temperature on the back surface of the wall material of IO°C.
Table 2 shows the results of a dew condensation test conducted under these conditions.

The wall material of Example 1.2 had no condensation and remained completely unchanged even after 24 hours, but the wall material of Comparative Example 1 had the same surface feel as Example 1.2. There was a stiffness in the wall. The wall materials of Comparative Examples 2 and 3 had condensation, and water was dripping down the wall surface.

Practical Test 2 The vinyl wall materials of Example 1.2 and Comparative Example 1.2 above were pasted on a wall surface where dew condenses at night using normal starch glue, and the effects and long-term deformation were investigated and shown in Table 3. Ta. When the daytime temperature was high, all four samples were in a dry state, but at night there was a difference, and the wall materials of Example 112 and Comparative Example 1 maintained a smooth feel, but The wall material of Comparative Example 2 had a damp surface due to condensation. When the temperature became high (low humidity) again, each sample became dry. At the end of 60 days of continuous observation, Example 1
,2 The wall material remained attached and remained unchanged.
The wall material of Comparative Example 1 had peeled from the wall surface, and mold had grown in the peeled part. The conventional wall material of Comparative Example 2 sagged, and the surface was stained with mold and stains.

When the wall material of Comparative Example 1 was attached using a hydrophobic and water-resistant adhesive, there was no peeling between the wall material and the wall surface, but wrinkles did occur due to sagging of the wall material. child.

Table 3 11 0 is almost impossible Δ Partially present × Available throughout

Claims (4)

[Claims] (1) Chloride 5゛°ruti! In a vinyl wall material for preventing dew condensation consisting of a resin composition foam made of H5 super absorbent polymer 3 and a plasticizer and a base coated with it, a water-impermeable layer is provided between the foam layer and the base. Vinyl wall material for preventing condensation. (2) The vinyl wall material for preventing dew condensation according to claim 1, wherein the super absorbent polymer is a polymer electrolyte having a crosslinked structure containing a carboxylic acid and/or a salt thereof. (3) The super absorbent polymer is vinyl ester (X) and ethylenically unsaturated carboxylic acid or its derivative (Y) y
Claim 1: A saponified copolymer consisting of main components L, T, and X:Y in a molar ratio of 10:90 to 90:10. Materials for use (4) The vinyl wall material for preventing dew condensation according to claim 1, 2, or 3, wherein the water-impermeable layer is made of non-foamed vinyl chloride resin or amide resin.