JPH0622396U - Wall paper - Google Patents

Abstract

(57) [Summary] [Object] To provide a non-foamed or foamed wallpaper formed without adding a plasticizer. [Structure] A surface layer a is formed from ethylene methyl methacrylate in a sheet shape of about 0.2 m / m, and the surface layer a is laminated on the upper surface of a backing layer b made of paper.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to wallpaper. In the present specification, Chemical Formulas 1 to 4 represent the same formula.

[0002]

[Prior art]

 Conventional wallpaper includes unfoamed wallpaper formed by blending a plasticizer, stabilizer, etc. in polyvinyl chloride resin, and foamed wall paper formed by further adding a foaming agent and heating and foaming.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional wallpaper, there was a possibility that the plasticizer that had been added migrates to the surface as it is used, and stains may be easily attached to the surface. In addition, the conventional wallpaper may cause cracks on the surface due to migration of the plasticizer. In addition, vinyl wallpaper generated a large amount of chlorine gas, hydrochloric acid gas, and other harmful gases when burned, and there was the problem of gas poisoning such as a building fire. In addition, when incinerating wallpaper, it was easy to cause corrosion of metal in incinerators.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide incineration that is excellent in pollution resistance and does not generate a halogen-based toxic gas when incinerated. It is to provide a wallpaper without adding a plasticizer suitable for.

[0005]

[Means for Solving the Problems]

 The technical means of the present invention to achieve the above object are:

CH ₂ ═CH ₂ , CH ₂ ═CR ₁ COOR <R ₁ is H and CH ₃ R ₂ is an alkyl group> An ethylene-based copolymer or a mixture thereof is used as a main component. Is.

Further, it is formed by adding a foaming agent to an ethylene-based copolymer obtained by copolymerizing the above chemical formula 2 or a mixture thereof and heating and foaming.

[0007]

【Example】

 Hereinafter, an example of the implementation of the wallpaper of the present invention will be described. The wallpaper A is mainly composed of an ethylene-based copolymer obtained by copolymerizing the following chemical formula 3 or a mixture thereof, and the desired thickness is obtained by a conventionally known extrusion molding, calender molding or the like. The surface layer a (non-foamed state) a is formed into a sheet or film, and the surface layer a is laminated on a backing layer b (eg, paper, base cloth, etc.) generally used for wallpaper. (See Figure 1).

CH ₂ ═CH ₂ , CH ₂ ═CR ₁ COOR <R ₁ is H, CH ₃ R ₂ is an Alkyl Group>

The overall shape of the wallpaper A, the pattern and color of the surface layer a, and the thicknesses of the surface layer a and the backing layer b are not shown, but they are optional, and the backing layer b is an essential requirement. Instead, it may be constituted only by the surface layer a. Further, the surface layer a may be transparent or translucent, and is optional.

The ethylene-based copolymer obtained by copolymerizing the above chemical formula 3 is, for example, ethylene methyl methacrylate, ethylene ethyl acrylate, ethylene methyl acrylate, ethylene butyl methacrylate, ethylene hexyl acrylate, ethylene lauryl methacrylate, ethylene stearyl acrylate. It is composed of ethylene and various acrylic acid esters or various methacrylic acid esters.

Examples of the processing method of the surface layer a include T-die extrusion, calendering, and the like. For example, the above-mentioned ethylene-based copolymers or a mixture thereof are used to obtain a desired thickness by T-die extrusion known in the related art. Is formed into a sheet shape. At this time, the temperature range of the suitable resin in the head portion is 140 to 220 ° C, preferably 150 to 210 ° C.

In addition, in the case of calendering, in order to improve the lubricity of rolls, an acrylic processing aid, an organic acid metal salt, an organic fatty acid alone or a mixture of two or more of these is added to the above resin. . The above-mentioned acrylic processing aid, organic acid metal salt, organic fatty acid, or a mixture of two or more thereof is added in an amount of 0.005 to 10 parts by weight, preferably 0.01 to 3 parts by weight, relative to 100 parts by weight of the resin. It is a department. When the surface layer a is formed by calendering, the suitable temperature range is 100 to 220 ° C, preferably 120 to 200 ° C.

Acrylic processing aids include acrylic acid, methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, 2-ethylhexyl acrylate, and other acrylic acid esters, ethyl methacrylate, n-butyl methacrylate. , A group of polymers consisting of copolymers containing methacrylic acid ester such as methacrylic acid-2-ethylhexyl as the main component. Specifically, for example, commercially available Mitsubishi Rayon METABLENE P-700 and METABLEN P- 551, Metabrene P-530A, Metabrene L-1000, Kane Ace PA-20, Kane Ace PA-100, Asahi Denka Kogyo's Mark LS-3, Mark LS-5 etc.

The organic acid metal salt is a higher fatty acid salt of a metal, such as zinc stearate, zinc laurate, zinc oleate, barium stearate, calcium stearate, dibutyltin laurate, dibutyltin stearate, dibutyltin dilaurate. , Dibutyltin distearate and the like.

The organic fatty acid is, for example, stearic acid, oleic acid, lauric acid, palmitic acid and the like.

In order to impart desired performance to a product regardless of the processing method, a copolymer obtained by copolymerizing the above chemical formula 3 or a mixture thereof is added to a copolymer of ethylene and vinyl acetate as an additive, Mainly composed of polymers and copolymers such as ethylene, propylene, butene, butene-1,3-methyl-butene-1, hexene-1, octene-1,4-methyl-pentene-1, etc., such as high density polyethylene, medium Low-density polyethylene, ultra-low-density polyethylene, crystalline polypropylene, polybutene, etc. and other polyolefins consisting of these mixtures, and antistatic agents, UV absorbers, antioxidants, pigments well known in the technical field of this kind. It is also possible to add anti-blocking agents, anti-twist agents, fillers, etc. In the calendering, further, as the processing aid, the above-mentioned acrylic processing aid, organic acid metal salt, organic fatty acid alone or a mixture of two or more thereof is added in an amount of 0.005 to 10 parts by weight with respect to 100 parts by weight of the resin. Is added.

These formulations depend on the copolymer or their mixture, the type and amount of processing aids added.

Here, an example of a concrete implementation will be described. [Surface layer a] Ethylene methyl methacrylate: 100 parts by weight LS-5 (acrylic processing aid): 0.5 parts by weight Titanium oxide (white pigment): 5 parts by weight at a roll temperature of 140 ± 2 ° C. It was calendered and formed into a sheet shape of about 0.2 m / m. The suitable temperature range in this case is 100 to 220 ° C, preferably 120 to 200 ° C. [Backing layer b] Wallpaper A was formed by stacking the above-mentioned surface layer a on the upper surface of the backing layer b formed with paper to a thickness of about 0.13 m / m.

Next, as an example of the wallpaper according to claim 2, a processing aid, a foaming agent, and a foaming aid are added to an ethylene-based copolymer obtained by copolymerizing the above chemical formula 3, and the desired conditions are satisfied. Under heat (roll temperature 100 ° C. to 160 ° C.) to form a foamed surface layer a ′, and the surface layer a ′ is laminated on the backing layer b, primer surface treatment, printing, heat foaming, embossing As a result, foamed wallpaper A'is formed. Even in this case, the backing layer b is not an essential requirement, and may be composed of only the surface layer a '.

The foaming agent is, for example, ADCA, OBSH, TSH (paratoluenesulfonylhydrazide) DPT (dinitropentamethylenetetramine) or a mixed blend of these foaming agents.

The foaming aid is an inorganic salt such as zinc white (ZnO) and tribasic lead sulfate, a metallic soap such as lead stearate, and a urea compound.

As a specific example, [surface layer a] ethylene methyl methacrylate: 100 parts by weight LS-5: 0.5 parts by weight ZnO: 0.5 to 1.0 parts by weight ADCA: 2 to 5 parts by weight titanium oxide: 5 to 10 parts by weight Parts Magnesium hydroxide: 20 to 30 parts by weight of a mixture was calendered at a roll temperature of 140 ± 2 ° C to form a sheet of about 0.2 m / m. The suitable temperature range in this case is 100 to 220 ° C, preferably 120 to 200 ° C. Further, the backing layer b is the same as in the case of the above-mentioned claim 1, and therefore its explanation is omitted.

Then, the wallpaper sheet that has been sheeted out by calendering is passed through a foaming furnace heated to about 220 ° C., the foaming agent contained therein is decomposed to generate gas, and foam cells are formed inside the sheet to foam. To complete. The expansion ratio after foaming at this time is determined by the compounding formulation of the foaming agent and the amount added, but is usually about 2 to 7 times.

Next, a primer surface treatment is performed. The primer surface treatment is gravure printing with a 60 to 120 mesh roll using a gravure printing machine and drying in a drying oven. Suitable primer surface treatments are acrylic, modified acrylic, vinyl chloride / acrylic, solvent-based and emulsion-based surface treatment agents containing 10 to 30% of polyolefin resin. It is also possible to add a matting agent.

After that, the PVC resin and the PVC resin / acrylic resin-based printing ink are printed by an engraving roll in a gravure printing machine and dried in a drying oven. Then, the surface of the foamed sheet was heated to 160 to 220 ° C. by an embossing machine and then sandwiched between an embossing roll and a rubber roll (backup roll) to apply pressure to form an uneven pattern. Further, the wallpaper manufacturing process may be performed in any order of calendar surface treatment, primer surface treatment, print printing, foaming, and embossing.

Therefore, by adding 0.5 to 1 part by weight of ZnO as a foaming aid (kicker), the decomposition start temperature of the foaming agent is lowered from 200 ° C. to about 150 ° C., the foaming property is improved, and the high foaming lightweight is achieved. A sheet could be formed. In the above example, the case of forming by calendering is described, but other known methods such as T-die extrusion may be used.

[0026]

[Effect of device]

 The invention is

Embedded image _{CH 2 = CH 2, CH 2} = CR 1 COOR <R 1 is H, CH ₃ R ₂ is an alkyl group> formed as a main component an ethylene-based copolymer or mixtures thereof obtained by copolymerizing, Alternatively, it is formed by adding a blowing agent to an ethylene-based copolymer obtained by copolymerizing the above chemical formula 4 or a mixture thereof and heating and foaming it, and a plasticizer such as a conventional PVC wallpaper is not added. It is possible to provide a wall paper excellent in stain resistance, which is free from adverse effects caused by bleeding out and migration of the agent, that is, there is no risk of stains adhering to the surface due to migration of the plasticizer.

Further, the wallpaper of the present invention is very useful because it does not generate halogen-type toxic gas during incineration unlike conventional wallpapers, so that safety is improved and corrosion of metals such as incinerators is not caused. is there.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an example of a wallpaper according to claim 1.

FIG. 2 is a vertical sectional front view showing an example of the wallpaper according to claim 2.

[Explanation of symbols]

 A, A ': Wallpaper a, a': Surface layer b: Backing layer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location D21H 27/30 27/20 // C08L 23:04

Claims (2)

[Scope of utility model registration request] 1. An ethylene-based copolymer obtained by copolymerizing CH ₂ ═CH ₂ , CH ₂ ═CR ₁ COOR <R ₁ is H and CH ₃ R ₂ is an alkyl group> or a mixture thereof. A wallpaper characterized by being formed as an ingredient. 2. A wallpaper formed by adding a foaming agent to an ethylene-based copolymer obtained by copolymerizing the chemical formula 1 represented in claim 1 or a mixture thereof and heating and foaming the mixture. .