WO2004013404A1

WO2004013404A1 - Wallpaper and method for production thereof

Info

Publication number: WO2004013404A1
Application number: PCT/JP2003/009728
Authority: WO
Inventors: Norihide Inoue
Original assignee: Mitsui Chemicals, Inc.
Priority date: 2002-08-06
Filing date: 2003-07-31
Publication date: 2004-02-12

Abstract

A wallpaper, characterized in that it comprises a substrate (A) and, laminated thereon, a foamed resin layer (B) formed from a polyolefin resin composition comprising 100 parts by weight of a polyolefin resin (b-1) and 20 to 200 parts by weight of a flame retardant and/or an inorganic filler and, laminated on the foamed resin layer (B), a printed layer and further a polyolefin film (C) laminated on the printed layer. The wallpaper is excellent in the resistance to scratching and staining and the easiness in the removal of stains.

Description

Description Wallpaper and its manufacturing method

The present invention relates to a wallpaper to be stuck on a wall, a ceiling, and the like, and more particularly, to a wallpaper excellent in scratch resistance, stain resistance, and stain removal properties, and a method for producing the same. Background art

The wallpaper is a structure in which a synthetic resin sheet is bonded to the front side on a paper base material. The wallpaper obtained by bonding a synthetic resin sheet to the front side on a paper base is scratch-resistant. In addition, methods for improving these properties are being studied because they are inferior in stain resistance (also called stain resistance) and stain removal properties.

Japanese Patent Application Laid-Open No. 2000-260287 discloses a wallpaper in which an ethylene-vinyl alcohol copolymer resin finolem is laminated on a foamed resin layer.

These wallpapers are excellent in stain resistance and the like, but are still insufficient for practical use, and further improvements are desired. Further, the adhesive strength between the foamed resin layer and the film layer was not sufficient, and an adhesive was required between these layers.

Japanese Patent Application Laid-Open No. H10-27898 discloses a wallpaper in which a foamed resin layer, a non-foamed thermoplastic resin layer and a printing layer are laminated in this order. However, even in the method according to the publication, the adhesive strength between the foamed resin layer and the non-foamed thermoplastic resin layer is insufficient, so it is necessary to provide an adhesive layer such as an adhesive between the layers. Contamination is a concern. In addition, since the printing layer is on the surface of the wallpaper, there were problems such as peeling of the printing ink and the soiling of the wallpaper surface.

The present inventors have solved the above-mentioned problem by laminating a polyolefin film on a specific foamed resin layer for a wallpaper having excellent scratch resistance, stain resistance, and stain removal properties, and completed the present invention. Reached. Disclosure of the invention

That is, the present invention provides a polyolefin resin composition comprising 100 parts by weight of a polyolefin resin (b-1) and 200 to 200 parts by weight of an inorganic filler based on 100 parts by weight of a polyolefin resin (b-1). A printed layer is laminated on a foamed resin layer of a laminate in which a foamed resin layer (B) formed from a product is laminated, and a polyolefin film (C) is further laminated on the printed layer. Hey, how to make it. BEST MODE FOR CARRYING OUT THE INVENTION

According to the present invention, a printed layer is laminated on a foamed resin layer, which is a laminate in which a foamed resin layer (B) formed of a polyolefin resin composition is laminated on a base material (A), and a polyolefin is further provided on the printing layer. The present invention relates to a wallpaper characterized by being laminated with a film (C).

Base material (A)

As the substrate (A) in the wallpaper of the present invention, a paper substrate / nonwoven fabric is generally used. The paper substrate is selected according to the purpose of the wallpaper, such as paper made from natural pulp or synthetic pulp, or paper mixed with inorganic substances. When the foamed resin layer (B) (hereinafter sometimes referred to as a foamed resin sheet (layer)) itself has water resistance and flame retardancy, its properties are particularly applied to a paper base material. Although it can be used for general purposes even if it is not required, the use of flame-retardant paper containing inorganic substances as the base material (A), for example, paper containing aluminum hydroxide, etc., further enhances the flame retardancy, and thus enhances safety. It is preferable in increasing the value.

Polyolefin resin and composition constituting foamed resin layer (B) The foamed resin layer constituting the wallpaper of the present invention laminated on the base material (A) is formed from a polyolefin resin composition. The polyolefin resin composition is formed from a polyolefin resin composition comprising 100 to 100 parts by weight of a polyolefin resin (bl) and 20 to 200 parts by weight of an inorganic filler.

The polyolefin resin (b_l) is preferably an ethylene (co) polymer. Specific examples of the ethylene-based (co) polymer include high-density polyethylene, high-pressure low-density polyethylene, a copolymer of ethylene and α-olefin with 3 to 20 carbon atoms, an ethylene-butyl acetate copolymer, Ethylene monomethyl acrylate copolymer, Examples thereof include ethyl acrylate copolymer and the like, and mixtures thereof.

Ethylene (co) polymer has a density of 0.850-0.990 g / cm ³ and a melt flow rate of 0 (ASTM D 1238, 190.C, 2.16 kg load, hereinafter abbreviated as MFR). A range of 1-100 gZ is used.

More preferred polyolefin resin (b-1) includes at least one ethylene. _Α -olefin copolymer having a density of 0.850 to 900 g / cm ³ , MFR ^ SO. 50-90 ^_0/0 and density 0. 91 0~0. 940 g / cm 3, MFR is 0.. 1 to 50 g Z of least one in the range of 10 minutes high-pressure low-density polyethylene 10-50 a composition comprising by weight ^_0/0. Examples of the α-olefin in the ethylene 'α-olefin copolymer include α-olefins having 3 to 20 carbon atoms, and preferably, propylene, 1-butene, 1-hexene, and 1-otaten; More preferably, it is 1-butene. E α- Orefin content Ji Ren 'Orefuin copolymer is 5-50 mole ^_0/0, favored properly is 10-30 mole ⁰ /. It is.

By forming a foamed sheet layer using such a preferable polyolefin resin composition, moldability, foaming, flexibility, adhesive strength with a substrate (Α), a printed layer and a polyolefin film (C) A wallpaper having excellent adhesive strength with the resin can be obtained.

Tackifier

The polyolefin resin composition constituting the foamed resin layer (Β) may contain a tackifier (b-2). As the tackifier (b-2), a hydrocarbon having a glass transition point in the range of 20 to 140 ° C, preferably 40 to 120 ° C, and a number average molecular weight of 1200 or less, preferably 600 to 1000 Resin. If the glass transition point is higher than 140 ° C, the rigidity of the foamed resin sheet obtained is high, and the flexibility is impaired. If the glass transition point is lower than 20 ° C, the surface of the foamed resin sheet becomes sticky, which is not preferable. Specifically, an alkyl phenol resin, an alkyl phenol-acetylene resin, a xylene resin, a petroleum resin, a chroman-indene resin, a terpene resin, a rosin and the like having the above glass transition point and molecular weight can be used. Further, in view of heat resistance and weather resistance, the above resins are hydrogenated (hydrogenated) to form an alicyclic saturated hydrocarbon. And hydrogenated petroleum resins are particularly preferred.

When the polyolefin resin composition constituting the foamed resin layer (B) contains the tackifier (b-2), the mixing ratio of the polyolefin resin (b-1) and the tackifier (b-2) is as follows: b-1) is 99.8 to 50 weight ^_0/0, preferably 99.7 to 20 wt%, (b-2) is from 0.2 to 50 weight ^_0/0, preferably from 0.3 to 20 weight ⁰ / ₀ . When the polyolefin resin composition contains a tackifier, the adhesive strength with the polyolefin film (C) is further increased, which is preferred.

Flame retardant and / or inorganic filler

Examples of the flame retardant include hydrated metal oxides such as aluminum hydroxide and magnesium hydroxide. Examples of the inorganic filler include calcium carbonate, talc, barium sulfate, and magnesium sulfate. The polyolefin tree

The amount of the flame retardant and Z or inorganic filler added to (b-1) and the tackifier (b-2) is as follows: (b-1) and (b-2): Alternatively, the inorganic filler may be blended in an amount of 20 to 200 parts by weight, preferably 30 to 150 parts by weight, and more preferably 40 to 90 parts by weight. If the addition amount of the flame retardant Z or the inorganic filler exceeds 200 parts by weight, the moldability and the foaming property of the foamed resin layer are inferior, the adhesive strength with the polyolefin film (C) is not sufficient, and 20 parts by weight. If it is less than 10, the flame retardancy is insufficient, so that it is not preferable.

By using such a resin composition as a foamed resin layer, the adhesive strength to a polyolefin film described later is improved. Such a resin composition may contain other synthetic resin or rubber, or an antioxidant, a heat-resistant stabilizer, a weather-resistant stabilizer, or a slip agent, if necessary, as long as the performance as the wallpaper of the present invention is not impaired. , An anti-blocking agent, a crystal nucleating agent, and an additive such as a hydrochloric acid absorbent.

Further, after blending each component of the polyolefin resin composition and various additives as necessary with a mixer such as a Henschel mixer, a Banbury mixer, a tumbler mixer, a mouth extruder or the like, a force render is performed. The sheet can be formed into a sheet by subjecting it to a known sheet forming machine such as forming and T-die forming.

A foaming agent is added to such a resin layer, and foaming is performed under the conditions of the foaming temperature and pressure to form a foamed resin layer. As a method of manufacturing the foamed resin layer, A method of temporarily forming an unfoamed sheet from a resin composition to which a foaming agent has been added in advance and then increasing the temperature to change to a foamed resin sheet may be adopted, or foaming may be performed directly from the resin composition to which a foaming agent has been added. A method of obtaining a resin sheet may be used.

Foaming agent

Usable foaming agents are appropriately selected from chemical foaming agents and gas foaming agents (physical foaming agents) based on the molding method and molding temperature of the foamed resin sheet. Chemical blowing agents include azo compounds such as azodicarbonamide, azobisisobutyronitrinole, hydrazide compounds such as benzosulfonyl hydrazide, toluenesulfonyl hydrazide, and p, p'-oxybis (benzenesulfonyl hydrazide). And nitroso compounds such as dinitrosopentamethylenetetramine, and mixtures thereof, which decompose themselves under the molding conditions to generate gas for foam molding. If necessary, a foaming aid may be used together with these foaming agents. Examples of the foaming aid include zinc compounds such as zinc oxide and zinc stearate, and organic acids such as salicylic acid, phthalic acid and oxalic acid. Examples of the gas blowing agent (physical blowing agent) include hydrocarbons such as carbon dioxide, halogenated hydrocarbons such as difluorodichloromethane, butane, pentane, hexane, cyclobutane, and cyclohexane. These are gases themselves under the molding conditions and contribute to foam molding. Suitable gas blowing agents (physical blowing agents) include carbon dioxide, butane, and chlorofluorocarbon. A single foaming agent may be used, or a plurality of foaming agents may be used in combination.

Foam resin layer (B)

When forming a foamed sheet, a non-foamed resin sheet is once formed from a resin composition containing a foaming agent using a roll or a T-die, and then the resin sheet is moved under foaming molding conditions to form a foamed resin sheet. In the case of the production method, it is preferable to use a chemical blowing agent rather than a gas blowing agent. Foaming can be performed by using an air oven or a heating roll.

On the other hand, when a resin composition is supplied to an extruder and a foaming agent is press-fitted from another supply port of the extruder to form a foamed resin sheet directly from a die, a gas foaming agent (physical foaming agent) is generally used. ) Is used. In addition, a resin composition to which a chemical foaming agent has been added in advance is used. The foamed resin sheet can be fed to an extruder and the foamed resin sheet can be directly drawn from the die. The foamed resin layer (B) of the wallpaper of the present invention is obtained by adding a known foaming agent and foaming. The thickness of the foamed resin layer (B) is generally 0.1 to 2 mm, preferably 0.1 to 2 mm.

2 to 1 mm. By laminating the foamed resin sheet thus obtained with the above-mentioned base material (A) such as paper, a laminated body which is a part of the constitution of the present invention is obtained.

The production of a laminate of the base material (A) and the foamed resin layer (B) can be performed, for example, by stacking a foamed resin sheet on a paper base material and laminating both layers using an adhesive. Alternatively, it is also possible to laminate by pressure bonding by extruding a molten polyethylene resin or the like between layers. As another method, a preformed unfoamed resin sheet is laminated and adhered on a paper base material, or an unfoamed resin sheet is laminated on a paper base material, and thereafter, The laminate is foamed by subjecting it to foaming conditions such as passing the laminate through a heating roll and a heating roll, and a laminate in which a foamed resin sheet is laminated on a paper substrate can be obtained. In addition, a resin composition to which a foaming agent has been added can be directly laminated from an extruder or a calendar roll on a paper substrate.

A printed layer is provided on the surface of the foamed resin layer (B) of the laminate of the base material (A) thus obtained and the foamed resin layer (B), and a polyolefin film (C) is further laminated on the printed layer to obtain a wallpaper. There are no particular restrictions on the method used to make the substrate (A) Z foam resin layer (B) / printing layer, polyolefin film (C) force. Such a method is mentioned.

(1) After the surface of the foamed resin layer (B) of the laminate of the base material (A) and the foamed resin layer (B) is subjected to printing and further embossing or die-cutting, it is treated with a polyolefin film (C) described later. How to stack. (2) Printing is performed on the surface of the foamed resin layer (B) of the laminate of the base material (A) and the foamed resin layer (B), and after laminating a polyolefin film (C) described later on the printed layer, embossing or embossing is performed. How to process. (3) A method of embossing or embossing a laminate of a base material (A) and a foamed resin layer (B), and then laminating a printed polyolefin film (C) on the surface of the foamed resin layer (B).ポリ A printed polio is applied to the surface of the foamed resin layer (B) of the laminate of the base material (A) and the foamed resin layer (B). Embossing or embossing after laminating Refin Film (C).

Polyolefin film (C)

In the present invention, a method in which printing is performed on the foamed resin layer (B) and then a polyolefin film described later is laminated is preferable. By doing so, the protection of the printing surface is improved, and peeling of the printing ink can be prevented.

The wallpaper in the present invention is obtained by further laminating a polyolefin film (C) on the foamed resin layer (B) of the laminate. Specific examples of the polyolefin film (C) include a polyethylene film (for example, a high-density polyethylene film, a low-density polyethylene film, etc.), a polypropylene film (for example, a biaxially stretched polypropylene film ポリプロピレン an unstretched polypropylene film, etc.), A film formed from a copolymer of ethylene and an unsaturated carboxylic acid ester (for example, a copolymer of ethylene monoacetate, a copolymer of ethylene and methyl acrylate, a copolymer of ethylene and methyl methacrylate, etc.), Examples include a film formed from a copolymer with an unsaturated carboxylic acid (eg, an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, etc.), and a film formed from an ionomer resin.

Further, in the present invention, as the polyolefin film (C), a film formed from a resin composition comprising polyolefin and a tackifier can be preferably used. Specific examples of polyolefin include polypropylene and ethylene (co) polymer. Preferably, it is an ethylene (co) polymer. Specific examples of the ethylene (co) polymer include high-density polyethylene, high-pressure low-density polyethylene, a copolymer of ethylene and α-olefin having 3 to 20 carbon atoms, and ethylene monoacetic acid. Examples include ethylene and unsaturated carboxylic acid ester copolymers such as Bier copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, and mixtures thereof. Can be. The density of the ethylene (co) polymer is 0.880 to 0.960 g / cm ^{3 for} the copolymer of ethylene and α-olefin, and 0.890 to 0.9. 50 g Z cm ³ is preferred. For ethylene and unsaturated carboxylic acid ester copolymer, 0. 9 1 0~0. 9 8 0 g / cm 3, further 0. 9 2 0~0. 9 7 0 g Z cm 3 is preferred New The molecular weight MFR (ASTM D 1238, 190 ° C, 2.16 kg load) of the ethylene (co) polymer is preferably 0.5 to 70 g / 10 min, more preferably 1 to 50 gZl 0 min.

The polyolefin film (C) may contain a tackifier. It is preferable that the polyolefin film (C) contains a tackifier because it has excellent adhesion to the foamed resin layer (B). Here, the tackifier and the tackifier (b-2) are used in the same meaning.

The tackifier is a hydrocarbon resin having a glass transition point of 20 to 140 ° C, preferably 40 to 120 ° C, and a number average molecular weight of 1200 or less, preferably 600 to: L000. is there. If the glass transition point is higher than 140 ° C, the obtained film has high Oj-lj property, which is not preferable because the flexibility is impaired. If the glass transition point is lower than 20 ° C, the film surface becomes sticky, which is not preferable. Specifically, an alkyl phenol resin, an alkyl phenol monoacetylene resin, a xylene resin, a petroleum resin, a chroman-indene resin, a terpene resin, a rosin, etc. having the above glass transition point and molecular weight can be used. Further, from the viewpoints of heat resistance and weather resistance, alicyclic saturated hydrocarbons obtained by hydrogenating (hydrogenating) each of the above resins are preferable, and hydrogenated petroleum resins are particularly preferable.

If polio Lev in film (C) comprises a tackifier, the mixing ratio of the polyolefin and tackifier polyolefin is from 50 to 99.8 weight ⁰ I preferably 60 to 99.7 wt%, more preferably 70 It is in the range of 99.5% by weight, as a tackifier, in the range of 0.2 to 50% by weight, preferably in the range of 0.3 to 40% by weight, and more preferably in the range of 0.5 to 30% by weight. In the resin composition, if necessary, other synthetic resin or rubber, or an antioxidant, a heat stabilizer, a weather resistance stabilizer, a slip agent, an antiblocking agent, a hydrochloric acid absorber, a crystal nucleating agent, a pigment, etc. And an additive such as an inorganic filler. In particular, an antistatic agent can be added for the purpose of preventing dust adhesion, and a pigment or inorganic filler can be added for the purpose of improving the surface gloss.

As a method of laminating the polyolefin film (C) on the foamed resin layer, a method of laminating the polyolefin film and Z or the foamed resin layer by heating and pressing with a force π heat roll or the like, or a method of laminating the resin material of the polyolefin film Or resin set An extrusion lamination method in which the product is extruded from a die and laminated with a foamed resin layer in a molten resin state can be used. Among these, the extrusion lamination method can be preferably used because the wallpaper after lamination has less curl and high adhesive strength. In the present invention, two or more kinds of polyolefin films can be used in a laminated state.

The thickness of the polyolefin film (C) layer is 1 to 30 πι, preferably 2 to 20 μm.

[Example]

Next, the present invention will be described with reference to examples, but the present invention is not limited thereto.

[Example 1]

MFR (1 90 ° C) is 3. 6 GZL O fraction, E Ji Ren 1-butene random copolymer (1-butene content of 1 9 mole ^_0/0) having a density of 0. 860 gZcm3 70 weight ^_0/0 High-pressure method with MFR (1 90 ° C) of 9.5 gZl O content and density of 0.917 gZcm3 Low-density polyethylene 30% by weight, the average particle diameter is 0.8 μ m, 70 parts by weight of magnesium hydroxide, and 5 parts by weight of azodicarbonamide as a foaming agent, and a T-die molding machine equipped with a 4 Omm φ extruder at a die temperature of 140 ° C and a thickness of 130 m Was obtained. The obtained unfoamed resin sheet was bonded to a paper substrate (plain paper) having a basis weight of 65 g / m2 by heating to 140 ° C. This was passed through a continuous foaming furnace set at 210 ° C. for 2 minutes to obtain a laminate having a foaming resin layer having an expansion ratio of 4.5.

Further, the surface of the foamed resin layer of the obtained laminate was subjected to primer treatment and gravure printing.

Next, a low-density polyethylene with a density of 0.946 gZcm3 and an MFR (190 ° C) force of S9 gZlO was used on an extrusion laminating machine with a die width of 50 Omm and a 65 mmφ extruder. Then, extrusion lamination was performed on the printing surface of the obtained laminate at a resin temperature of 290 ° C. and a speed of 8 Om / min to obtain a wallpaper. The thickness of the laminated polyolefin film was 10 ^ m. The following evaluation was performed using the obtained wallpaper. Table 1 shows the results.

Scratch resistance: The back and front of the wallpaper were rubbed, the polyolefin film surface was observed, and the scratch resistance was evaluated.

Adhesive strength: The wallpaper sample was made into a strip of 15 mm, and the layer between the polyolefin film and the foamed resin layer was peeled at a rate of 300 mm / min in the direction of 180 degrees, and the peel strength at that time was measured to obtain the adhesive strength. .

Curl: The degree of warpage in the TD direction of the wallpaper sample was observed, and the curl was evaluated.

[Example 2]

Wallpaper was obtained in the same manner as in Example 1 except that the thickness of the polyolefin film was changed to 20 μm. Table 1 shows the evaluation results of the obtained wallpaper.

[Comparative Example 1]

In Example 1, when the scratch resistance was evaluated using the laminate before laminating the polyolefin film, the foam resin layer was found to be scratched.

[Example 3]

Except that an ethylene-ethyl acrylate copolymer having a density of 0.940 g / cm3, an MFR (90.C) of 5 g / 10 min, and an ethyl acrylate content of 19 wt% was used as polyolefin for film. A wallpaper was obtained in the same manner as in Example 1.

Table 11 shows the evaluation results of the obtained wallpaper.

[Example 4]

Wallpaper was obtained in the same manner as in Example 3 except that the thickness of the polyolefin film was changed to 20 Aim. Table 11 shows the evaluation results of the obtained wallpaper.

[Example 5]

Example 1 was repeated except that an ethylene-methacrylic acid copolymer having a density of 0.930 g / cm3, an MFR (l 90 ° C) of 8 g / 10 min, and a methacrylic acid content of 9 wt% was used as polyolefin for film. Wallpaper was obtained in the same way.

Table 11 shows the evaluation results of the obtained wallpaper.

[Example 6] Wallpaper was obtained in the same manner as in Example 5, except that the thickness of the polyolefin film was set to 20. Table 11 shows the evaluation results of the obtained wallpaper.

[Example 7]

As a polyolefin for film, an ethylene monoacetate biel copolymer having a density of 0.930 gZcm3, an MFR (l 90.C) of I5 g / 10 min, and a biel acetate content of 14 wt% was used. A wallpaper was obtained in the same manner as in Example 1 except that the temperature was 230 ° C. Table 11 shows the evaluation results of the obtained wallpaper.

[Example 8]

Wallpaper was obtained in the same manner as in Example 7, except that the thickness of the polyolefin film was changed to 20 μπι. Table 11 shows the evaluation results of the obtained wallpaper.

[Example 9]

Zinc ion type ionomer resin (Mitsui's Dupont Polychemical Carnet ± $ ¾, trade name: Himilan 1 652) A wallpaper was obtained in the same manner as in Example 1 except that the wallpaper was used.

Table 1 shows the evaluation results of the obtained wallpaper.

[Example 10]

Wall paper was obtained in the same manner as in Example 9 except that the thickness of the polyolefin film was changed to 20 m. Table 11 shows the evaluation results of the obtained wallpaper.

[Example 11]

The density of 0.946 g / cm MFR (190 ° C) is 9 g / l 0 min polyethylene by extrusion laminating machine with die width of 500 mm and extruder of 65 mm φ. 9 3 use the weight ^_0/0 and tackifier (Arakawa I匕学Ltd. Arkon P- 1 2 5 (number average molecular weight 8 20, the glass transition point 8 0 ° O) 7 consisting of by weight% resin composition, the resin Extrusion lamination was performed on the printed surface of the obtained laminate at a temperature of 290 ° C. and a take-off speed of 8 Om / min to obtain a wallpaper, and the thickness of the laminated polyolefin film was 8 μπι. Table 1 shows the evaluation results of the wallpaper.

[Comparative Example 2]

Except that the addition amount of magnesium hydroxide was 120 parts by weight in the same manner as in Example 1, Got the wallpaper. Table 11 shows the evaluation results of the obtained wallpaper.

Table 1

LLDPE: Low density polyethylene

EEA: Ethylene monoethyl acrylate ester copolymer

EMAA: Ethylene monomethacrylic acid copolymer

EVA: Ethylene vinyl acetate copolymer

ION: Ionomer resin

Scratch resistance evaluation が No scratches or small scratches

X Significant scratches or foam layer rupture was observed.Curl 無い No warpage or a small amount of warpage

X markedly warped W 200

13

Industrial applicability

As a feature of the present invention, the specific resin composition is used as a foamed resin layer (B), and a printing layer is provided and laminated between the foamed resin layer (B) and the foamed resin layer (B). ) And the printed layer (foamed resin layer (B) Z print layer) or between the printed layer and the polyolefin film (printed layer Z polyolefin film) without using an adhesive. ) Z printing layer or printing layer Z polyolefin film (C) or foamed resin layer (B) The adhesive strength between each layer of Z polyolefin film (C) is to provide a wallpaper with sufficient adhesive strength. Furthermore, in the present invention, even if the printed foamed resin layer (B) is used, a wallpaper having a sufficient adhesive strength with the polyolefin film (C) can be obtained without using an adhesive. Generally, when a polyolefin film is laminated on a resin molded body that has been printed, the adhesive strength is not sufficient, and an adhesive is required. In the method of the present invention, since no adhesive is required, the amount of volatile components due to residual organic solvents and the like is small. In addition, since the printing layer is protected by the polyolefin film (C) by having a layer structure of the base material (A), the Z foam resin layer (B), the printing layer, and the polyolefin film (C), the printing ink peels off. It has the following advantages: the surface of the wallpaper is not easily stained (antifouling property), and the adhered dirt is easy to remove (stain removal property).

Claims

The scope of the claims

1. A foamed resin formed from a polyolefin resin composition comprising 20 to 200 parts by weight of a flame retardant and / or an inorganic filler per 100 parts by weight of a polyolefin resin (b-1) on a base material (A) A wallpaper characterized by comprising a printed layer laminated on a foamed resin layer (B) of a laminate in which a layer (B) is laminated, and a polyolefin film (C) further laminated on the printed layer. .

2. The polyolefin resin (b-'1) is an ethylene-based (co) polymer having a melt flow rate of 0.1 to: 100 g / 10 minutes.

3. Polyolefin luster (b-1) force S, density 0.850-0.900 gZcm

^3. Melt flow rate 0.1 to 100 gZl at least one kind of ethylene in the range of 0 min. _Α -olefin copolymer 50 to 90 parts by weight and density 0.910 to 0.940 gZ cm ³ 2. Wallpaper according to claim 1, characterized in that it is a kind of high-pressure low-density polyethylene of 10-50 parts by weight.

4. The wallpaper according to claims 1 to 3, wherein the polyolefin film (C) is a polyethylene film.

5. Polyolefin film (C) A film formed from at least one selected from mosquitoes, copolymers of ethylene and unsaturated carboxylic acids, copolymers of ethylene and unsaturated sulfonic acid esters, or ionomer resins. The wallpaper according to any one of claims 1 to 3, characterized in that:

6. The wallpaper according to claim 1, wherein at least one of the polyolefin resin composition or the polyolefin film (C) constituting the foamed resin layer (B) contains a tackifier.

7. On the base material (A), a foamed resin layer formed of a polyolefin resin composition comprising 20 to 200 parts by weight of a flame retardant and / or an inorganic filler with respect to 100 parts by weight of a polyolefin resin (b-1) ( The method for producing wallpaper according to any one of claims 1 to 6, wherein the polyolefin film (C) is laminated on the laminate on which B) is laminated by an extrusion lamination method.