JP2021181640A - wallpaper - Google Patents

Abstract

To provide wall paper capable of greatly suppressing generation of mutual peeling even if respective substrates mutually contact.SOLUTION: Wall paper 10 includes: a substrate 11 composed of paper; a resin layer 12 disposed on the substrate 11; a pattern layer 14 disposed on the resin layer 12; and a surface-protecting layer 15 disposed on the pattern layer, where moisture-proof coating layer 13 is further provided between the resin layer 12 and the pattern layer 14 for suppressing permeation of water vapor 14.SELECTED DRAWING: Figure 1

Description

The present invention relates to wallpaper used for interiors of buildings and the like.

Conventionally, a soft vinyl chloride resin sheet has been applied to the base material of the wallpaper used for the interior of a building, but in recent years, paper has been applied in consideration of environmental friendliness (for example, the following patent). Refer to Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2018-066089 Japanese Unexamined Patent Publication No. 2018-145621

In the above-mentioned wallpaper, when constructing on-site, after applying a water-based adhesive (glue) to the base material, it is left to cure for a while so that the glue will blend into the base material (open time). ). At this time, the wallpaper is meandered and bent so that the surface coated with glue does not come into contact with the surface not coated, so that the wallpaper can be easily carried after the open time.

When the surfaces (base materials) coated with glue are opposed to each other when they are bent and placed in this way, the coated surfaces (base materials) come into contact with each other during the open time and adhere to each other. It may end up (peeling off). When such phase peeling occurs, the base materials may be torn and torn when the base materials are peeled off during construction.

Therefore, it is an object of the present invention to provide a wallpaper that can greatly suppress the occurrence of phase peeling even if the base materials come into contact with each other.

The wallpaper according to the present invention for solving the above-mentioned problems includes a base material made of paper, a resin layer provided on the base material, a pattern layer provided on the resin layer, and the pattern layer. In the wallpaper provided with the surface protective layer provided above, a moisture-proof coat provided between the resin layer and the pattern layer or between the pattern layer and the surface protective layer to suppress the permeation of water vapor. It is characterized by having layers.

Since the wallpaper according to the present invention is provided with a moisture-proof coat layer between the resin layer and the pattern layer or between the pattern layer and the surface protective layer, the water vapor of the water-based adhesive applied to the base material permeates. As a result, it is possible to greatly prevent the water-based adhesive from drying out, so that even if the base materials come into contact with each other, the contacted base materials can be easily peeled off, and the base materials can be torn or torn. Can be prevented. Therefore, according to the wallpaper according to the present invention, even if the base materials come into contact with each other, the occurrence of phase peeling can be greatly suppressed.

It is sectional drawing which shows the schematic structure of the main embodiment of the wallpaper which concerns on this invention. It is sectional drawing which shows the schematic structure of the other embodiment of the wallpaper which concerns on this invention.

The embodiment of the wallpaper according to the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments described based on the drawings.

<Main embodiment>
A main embodiment of the wallpaper according to the present invention will be described with reference to FIG.

As shown in FIG. 1, the wallpaper according to the present embodiment includes a base material 11 made of paper, a resin layer 12 provided on the base material 11, a pattern layer 14 provided on the resin layer 12, and a pattern. In the wallpaper 10 provided with the surface protective layer 15 provided on the layer 14, the moisture-proof coat layer 13 provided between the resin layer 12 and the pattern layer 14 is provided to suppress the permeation of water vapor.

The base material 11 is made of general-purpose paper that is widely used for wallpaper, and has a basis weight of 50 g / m ² or more and 100 g / m ² or less and a thickness of 80 μm or more and 150 μm or less.

The resin layer 12 is made of a foamed resin in which a bubble portion 12b is formed in the resin portion 12a, and is a paste-like foaming agent-containing resin composition in which an aqueous emulsion resin, a foaming agent, an inorganic filler (filler) and the like are mixed. After being coated on the base material 11, the foaming agent is foamed by heating or the like and dried to form a film.

As the aqueous emulsion-based resin, a resin that can be used in the form of an aqueous emulsion, for example, a polyolefin-based resin can be applied. In particular, an ethylene copolymer containing ethylene and a component other than ethylene as a monoma is more preferable.

The foaming agent can be applied as long as it is used for general foaming wallpaper, and examples thereof include azo-based, hydrazit-based, nitroso-based, and heat-expandable microcapsule foaming agents. In particular, a heat-expandable microcapsule foaming agent is highly preferable from the viewpoint of functions such as expansion ratio and strength.

Examples of the inorganic filler include calcium carbonate, aluminum hydroxide, magnesium hydroxide, silica sand, talc, silicas, magnesium silicate, zinc borate, titanium dioxide and the like.

The proportion of the foaming agent-containing resin composition when dried is 50 parts by mass or more and 150 parts by mass or less of the inorganic filler and 1 part by mass or more and 20 parts by mass or less of the foaming agent with respect to 100 parts by mass of the aqueous emulsion resin. Is preferable.

The resin layer 12 preferably has a basis weight of 50 g / m ² or more and 220 g / m ² or less when dried, and has a foaming ratio of 3 times or more and 7 times or less. In addition, other additives such as a colorant can be added to the foaming agent-containing resin composition.

Such a foaming agent-containing resin composition is made into a paste by a knife coating method, a nozzle coating method, a die coating method, a lip coating method, a comma coating method, a gravure coating method, a rotary screen coating method, a reverse roll coating method, or the like. , Can be coated on the substrate 11.

The moisture-proof coat layer 13 is made of an acrylic resin, and the particles of the acrylic resin are fused to each other to form a film. Such a moisture-proof coat layer 13 can be formed by fusing the particles together by heating and drying the liquid in which the particles are emulsified. Therefore, the moisture-proof coat layer 13 has a low moisture permeability and can exhibit a moisture-proof effect. Here, if the particles are of the type covered with a water-soluble resin, the gaps generated between the particles are filled with the water-soluble resin, so that the film is formed more densely and a higher moisture-proof effect is exhibited. Can be and is very preferable.

Examples of the acrylic resin include acrylic acid ester resin, methacrylic acid ester resin, and acrylonitrile resin. Examples of the water-soluble resin include resol-type phenol resin, methylolated urea resin, methylolated melamine resin, polyvinyl alcohol, polyethylene oxide, polyacrylamide, carboxymethyl cellulose (CMC) and the like.

Moisture-proof coating layer 13, preferably the moisture permeability is less than 300g ^/ m 2 · 24h or more 550g ^/ m 2 · 24h. When the moisture permeability exceeds 550g ^/ m 2 · 24h, it is easy to aqueous adhesive (glue) is dried at open time, becomes susceptible to stripping phase is not preferable, moisture permeability 300 g / ^{m 2} -If it is less than 24 hours, it becomes difficult for water vapor to pass through, and mold and the like are likely to be generated on the base material 11, which is not preferable.

Further, the moisture-proof coat layer 13 preferably has a basis weight of 5 g / m ² or more and 20 g / m ² or less when dried. If the basis weight during drying ^{is less than 5 g / m 2} , the water-based adhesive (glue) tends to dry during the open time, which tends to cause phase peeling, which is not preferable. If it exceeds 20 g / m ² , it becomes difficult for water vapor to pass through, and mold and the like are likely to be generated on the base material 11, which is not preferable.

The above-mentioned emulsion liquid of acrylic resin particles is applied onto the resin layer 12 by a knife coating method, a nozzle coating method, a die coating method, a lip coating method, a comma coating method, a gravure coating method, a rotary screen coating method, a reverse roll coating method, or the like. Can be coated on.

The pattern layer 14 is provided with printing ink (non-foaming ink), foamable ink, or the like by a printing method to impart designability. Although the pattern layer 14 varies depending on the pattern, it is usually preferable that the thickness is 0.1 μm or more and 10 μm or less, and the basis weight (when dried) is 0.1 g / m ² or more and 10 g / m ² or less.

As the printing ink (non-foaming ink), a printing ink generally used for general purposes can be applied. Examples of the effervescent ink include those containing a water-based emulsion resin as a main component and those containing a vinyl chloride paste resin as a main component. Examples of the printing method include a gravure printing method, a screen printing method, a flexographic printing method, an ink jet printing method, and the like.

The surface protective layer 15 is made of a resin containing an acrylic resin as a main component, and is provided mainly for the purpose of protecting the surface of the pattern layer 14 and adjusting the gloss, and is further provided with a filler such as silica for the purpose of adjusting the gloss. It can also be contained. In addition, the surface protective layer 15 suppresses the elongation of the wallpaper 10 when the water-based adhesive (glue) is applied at the time of construction, and also suppresses the shrinkage of the wallpaper 10 when the water-based adhesive (glue) dries. You can do it. Further, it is preferable that the surface protective layer 15 has water repellency. The surface protective layer 15 preferably has a basis weight of 5 g / m ² or more and 40 g / m ² or less when dried.

The above-mentioned resin containing an acrylic resin as a main component is applied onto a foaming agent-containing resin composition before foaming by a gravure printing method, a knife coating method, a nozzle coating method, a die coating method, a lip coating method, a comma coating method, or the like. Can be worked on. Then, by heating and drying, a film is formed as the surface protective layer 15.

Further, the wallpaper 10 is formed with an embossed 10a having a concave-convex shape on the resin layer 12, the moisture-proof coating layer 13, the pattern layer 14, and the surface protective layer 15 to impart design. The embossing 10a is formed by applying or printing each of the above layers 12 to 15 on the base material 11 and then heating the embossing 10a while pressing the roll-shaped embossing plate on the surface protective layer 15 at the same time as the foaming of the resin layer 12 or immediately after the foaming. It can be formed by rolling. The surface temperature of the wallpaper 10 immediately before pressing the embossed plate is preferably 160 ° C. or higher and 200 ° C. or lower.

In the wallpaper 10 according to the present embodiment, since the moisture-proof coat layer 13 is provided between the resin layer 12 and the pattern layer 14, the water-based adhesive (glue) applied to the base material 11 can be used. Since it is possible to greatly suppress the permeation of water vapor and the drying of the glue, even if the base materials 11 come into contact with each other, the contact base materials 11 can be easily peeled off, and the base materials 11 can be easily peeled off. It is possible to prevent tearing and tearing.

Therefore, according to the wallpaper 10 according to the present embodiment, even if the base materials 11 come into contact with each other, the occurrence of phase peeling can be greatly suppressed.

<Other embodiments>
In the above-described embodiment, the case of the wallpaper 10 in which the moisture-proof coat layer 13 is provided between the resin layer 12 and the pattern layer 14 has been described, but the present invention is not limited to this. As another embodiment, for example, as shown in FIG. 2, even in the case of the wallpaper 20 in which the moisture-proof coat layer 13 is provided between the pattern layer 14 and the surface protective layer 15, the same as in the case of the above-described embodiment. Action effect can be obtained.

Although the examples carried out for confirming the effect of the wallpaper according to the present invention will be specifically described, the present invention is not limited to the following examples specifically described.

[Preparation of test body and comparative body]
<Test body 1>
"Base material"
Paper containing only natural pulp as a pulp component and not containing synthetic resin (“WK665TMN (product number)” manufactured by KJ Special Paper Co., Ltd.) was used as a base material. The basis weight is 65 g / m ² , and the thickness is 110 μm.

《Resin layer》
A mixture of an ethylene-vinyl acetate copolymer and acrylic ("S-7400HQ (product number)" manufactured by Sumika Chemtex Co., Ltd.) with respect to 80 parts by mass of an ethylene-vinyl acetate copolymer ("S-7400HQ (product number)" manufactured by Japan Coating Resin Co., Ltd. FK-715 (product number) ") 20 parts by mass, heat-expandable microcapsule foaming agent ("FT-16 (product number) "manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd.) 10 parts by mass, calcium carbonate powder (Asahi Mines Co., Ltd.) Manufactured by "MC-100 (Product No.)") 80 parts by mass was mixed to produce a paste-like foaming agent-containing resin composition.

Then, the foaming agent-containing resin composition was applied onto the substrate by the lip coating method so that the basis weight after drying was 100 g / m ^2.

《Damp proof coat layer》
An acrylic resin emulsion was applied onto the foaming agent-containing resin composition by a gravure printing method so that the basis weight after drying was 5 g / m ^2.

《Pattern layer》
A pattern layer was formed by a gravure printing method using a printing ink containing an acrylic resin as a resin component (“Hydric WP (product number)” manufactured by Dainichiseika Kogyo Co., Ltd.). The basis weight is 8 g / m ² (when dried), and the thickness is 0.8 μm.

《Surface protection layer》
A paint containing an acrylic resin as a main component (“ATC-4000 (product number)” manufactured by DIC Corporation) was applied onto the pattern layer by a gravure printing method so that the basis weight after drying would be 20 g / m ^2.

Finally, the foaming agent is foamed by heating (170 ° C.) and each layer is dried (foaming ratio: 4 times), and immediately after that, the roll-shaped embossed plate is rolled while being pressed to form an embossed pattern. To prepare a wallpaper test piece 1.

<Test body 2>
The wallpaper test was carried out in the same manner as in the case of the test body 1 except that the emulsion liquid of the acrylic resin was applied onto the foaming agent-containing resin composition so that the basis weight after drying was 15 g / m ^2. Body 2 was made.

<Test body 3>
The wallpaper test was carried out in the same manner as in the case of the test body 1 except that the emulsion liquid of the acrylic resin was applied onto the foaming agent-containing resin composition so that the basis weight after drying was 20 g / m ^2. Body 3 was made.

<Comparison 1>
The wallpaper comparative body 1 was produced by the same procedure as in the case of the test body 1 except that the moisture-proof coat layer was not formed.

<Comparative body 2>
By applying the same as in the case of Specimen 1, the wallpaper is compared except that the emulsion liquid of the acrylic resin is applied onto the foaming agent-containing resin composition so that the basis weight after drying is 30 g / m ^2. Body 2 was made.

[contents of the test]
<Humidity permeability>
The moisture permeability of the test bodies 1 to 3 and the comparative bodies 1 and 2 was measured in accordance with the Japanese Industrial Standards "JIS Z 0208".

<Phase off condition>
A water-based adhesive (glue) is applied on the substrates of the test bodies 1 to 3 and the comparative bodies 1 and ^{2 so that the solid content is 20 g / m 2, and the glued surface is not brought into contact with the unapplied surface.} After meandering, bending, and leaving for 120 minutes for curing, the adhesion (phase peeling) between the coated surfaces (base materials) that came into contact with each other was confirmed.

<Mold reproduction>
Test bodies 1 to 3 and comparative bodies 1 and 2 coated with a water-based adhesive (glue) on a substrate so that the solid content was 20 g / m ² were applied to a construction board (30 cm × 30 cm) after curing. After allowing to stand in an environment of a temperature of 40 ° C. and a humidity of 90% for 1 month, the test bodies 1 to 3 and the comparative bodies 1 and 2 were peeled off from the construction board to confirm the presence or absence of mold.

[Test results]
The results of the above tests are shown in Table 1 below. As for the degree of phase peeling, the one in which the base material is peeled off without tearing (including the one in which only a part of the end is torn) is marked with "○", and the one in which the base material is torn and torn throughout is "×". And said. As for the mold reproductiveness, those without mold were marked with "○", and those with mold were marked with "x".

As can be seen from Table 1, Comparative Body 1 (without the moisture-proof coat layer) did not generate mold, but did cause phase peeling. Therefore, the evaluation of Comparative Body 1 was "x".

On the other hand, Comparative Body 2 (moisture-proof coat layer size) did not cause phase peeling. However, since the comparative body 2 had mold, the evaluation was "Δ".

On the other hand, the test bodies 1 to 3 could easily peel off the contacting base materials without causing mold. Therefore, the evaluations of the test bodies 1 to 3 were "○".

The wallpaper according to the present invention can be extremely beneficially used in the construction industry and the like because the occurrence of phase peeling can be greatly suppressed even if the base materials come into contact with each other.

10, 20 Wallpaper 10a Embossed 11 Base material 12 Resin layer 12a Resin part 12b Bubble part 13 Moisture-proof coat layer 14 Pattern layer 15 Surface protection layer

Claims (7)

A base material made of paper and
The resin layer provided on the base material and
The pattern layer provided on the resin layer and
The surface protective layer provided on the pattern layer and
In wallpaper with
A wallpaper characterized by having a moisture-proof coat layer provided between the resin layer and the pattern layer or between the pattern layer and the surface protective layer to suppress the permeation of water vapor. The wallpaper according to claim 1, wherein the resin layer is made of a foamed resin. The wallpaper according to claim 1 or 2, wherein the moisture-proof coat layer is formed by fusing particles of an acrylic resin to each other to form a film. The wallpaper according to claim 3, wherein the moisture-proof coat layer has gaps between the particles filled with a water-soluble resin. The moisture-proof coating layer, wallpaper claimed in any one of 4, wherein the moisture permeability is not more than 300g ^/ m 2 · 24h or more 550g ^/ m 2 · 24h. The wallpaper according to any one of claims 1 to 5, wherein the moisture-proof coat layer has a basis weight of 5 g / m ² or more and 20 g / m ^{2 or less when dried.} The wallpaper according to any one of claims 1 to 6, wherein the resin layer, the moisture-proof coat layer, the pattern layer, and the surface protective layer are embossed.

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