JPH0647400U - Biodegradable wallpaper - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a wallpaper that is beautiful and voluminous, and can be landfilled as it is when discarded. [Structure] A biodegradable granular material (containing) layer obtained by spraying or coating a biodegradable granular material having a particle size of 0.5 to 5 mm on one surface of a base paper, a fixing layer made of a thin paper sheet, and clay. A biodegradable composition in which 50 to 200 parts by weight of biodegradable granules are mixed with 100 parts by weight of the clay coat paint in order through the coating layer, and a patterning layer is sequentially laminated, and a backing paper is attached to the other surface. Sex wallpaper. In the present invention, the biodegradable granular material means a material which is naturally decomposed by leaving it in the natural world or burying it in the soil without any special treatment.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to a biodegradable wallpaper, and more particularly to a wallpaper that has a beautiful and voluminous feel and can be landfilled as it is when discarded.

[0002]

[Prior art]

 Currently, the wallpaper market is about 90% vinyl wallpaper, about 10% paper wallpaper and others, and vinyl wallpaper is the mainstream. However, although vinyl wallpaper has a beautiful and voluminous feel, defective products generated during the manufacturing process and waste generated during use and replacement are not decomposed by landfill treatment and are harmful when incinerated. Environmental pollution problems are being caused by the generation of gas. On the other hand, as for paper wallpaper, it is inferior in the sense of beauty and volume, and a wallpaper that has been devised as a technique for improving it (Jpn. (Japanese Patent Application Laid-Open No. 2-167953), etc., there have been no products that satisfy the aesthetic demands and volume of consumers and have even been considered as waste.

[0003]

[Problems to be solved by the device]

 The present invention has been made in view of the above problems, and an object thereof is to provide a beautiful and voluminous paper wallpaper that uses a biodegradable material and can be directly landfilled when discarded.

[0004]

[Means for Solving the Invention]

 The present invention has been proposed to solve the above problems, and is characterized in that a specific layer structure is used as a material for paper wallpaper. That is, according to the present invention, a biodegradable granular material (containing) layer formed by spraying or applying a biodegradable granular material having a particle size of 0.5 to 5 mm on one surface of a base paper, and a thin paper sheet. Through a fixing layer and a clay coat layer, a patterning layer formed by mixing 50 to 200 parts by weight of biodegradable granules with 100 parts by weight of the clay coat paint was sequentially laminated, and a backing paper was coated on the other side. A biodegradable wallpaper that is pasted together and that can be directly landfilled for disposal is provided.

[0005]

[Specific explanation of the device]

 In FIG. 1 showing a cross section of a preferred example of the biodegradable wallpaper of the present invention, 1 is a base paper, 2 is a biodegradable granular material layer, 3 is a protective fixing layer, 4 is a clay coat layer, 5 is a patterned layer. , 6 indicates a backing paper. Hereinafter, the present invention will be described in detail.

<Base Paper> As the base paper, woodfree paper having a basis weight of 50 to 100 g / m ² , kraft paper, imitation paper, and the like are used, and among them, woodfree paper is preferably used.

<Biodegradable Granular Material Layer and Protective Fixing Layer> Using air or one surface of the base paper, the biodegradable granular material is dispersed in water or about 1 to 3% of pulp slurry. A biodegradable granular material layer is formed by spraying or coating with 10 to 50 g / m ² , preferably 20 to 30 g / m ^{2 with a} knife coater, flow coater, roll coater or the like. In the present invention, the biodegradable granular material means a material that is naturally decomposed without being treated specially by being left in the natural world or simply buried in the soil, for example, wood chips and chaff. It is preferable to use a plant-based material such as straw, animal material such as feathers and gelatin, and an inorganic filler mixed with a particle size of 0.5 to 5 mm to reduce weight, impart incombustibility, and reduce costs. Used for. When the particle size of the biodegradable granules is 0.5 mm or less, it is buried by the protective immobilization layer and clay coat layer, which will be described later, and no unevenness appears on the surface. On the other hand, when the particle size is 5 mm or more, it is retained by the protective immobilization layer. It cannot be used as a wallpaper material because it will fall off. In the present invention, it is further necessary to cover the biodegradable granular material layer with a thin paper sheet layer to secure and fix the biodegradable granular material. A pulp slurry is generally used as the coating material, and the coating amount is usually controlled to about 5 to 30 g / m ^2, but for the purpose of the present invention, it is preferable that the coating amount be as small as possible.

<Clay Coat Layer> Next, a clay coat paint comprising a clay, a pigment, a dispersant, an adhesive, a colorant and the like is provided on the protective fixing layer for the purpose of imparting a hiding property and a coloring property to the base. It is dried by 5 to 50 g / m ² , preferably 20 to 30 g / m ² by means such as air knife coating, flow coating, silk screen printing and flexographic printing.

<Patterning Layer> Further, a patterning layer is provided on the clay coat layer with a biodegradable coloring paint. The biodegradable coloring paint is blended with 100 parts by weight of clay coat paint in an amount of 50 to 200 parts by weight of biodegradable granules and the like, and the amount is 5 to 30 g / m ² , preferably by silk screen printing, flexographic printing, jet printer, etc. 10 to 20 g / m ² coating is dried and patterned.

<Backing Paper> Finally, a backing paper is attached to the back surface of the base paper by using a water-soluble adhesive such as starch or polyvinyl alcohol. The backing paper used here is a high-quality paper having a high basis weight of 40 to 100 g / m ² , preferably 60 to 80 g / m ^{2 with} a Steckigt sizing degree of 30 to 120 seconds, preferably 50 to 80 seconds. , Kraft paper or flame-retardant paper is used for fire protection. The purpose of increasing the size here is to prevent the glue from migrating to the base paper layer during wallpaper replacement work, and to increase the suitability for phase separation.

[0011]

[Biodegradability test method]

 20 pieces of the sample were cut into 20 cm x 30 cm and piled up as they were, and 20 pieces that were crushed by hand were put on top of each other, assuming that they should be discarded after use. , Take out after 6 months and 1 year and visually judge the disassembled state.

[0012]

【Example】

 Hereinafter, the present invention will be described with reference to examples, but the present invention is included in the present invention as long as it does not exceed the configuration described in the scope of claims for utility model and the technical idea described in the specification of the present application. It will be understood that

<Example 1> Wood chips having an average particle size of 1 to 2 mm as a biodegradable granular material were dispersed in a 2% pulp slurry at a concentration of 10% as a biodegradable granular material on a woodfree paper having a basis weight of 90 g / m ^2. The coating was applied with an air knife coater at 25 g / m ² and dried to provide a biodegradable granular material layer and the protective fixing layer. Next, a clay coat coating of the following composition was applied to this surface with an air knife coater at 40 g / m ² and dried to form a clay coat layer. At 15 g / m ² and dried to form a patterning layer. Finally, 50 g / m ² of high-quality paper was pasted on the back surface using 5 g / m ² of starch as an adhesive to obtain a biodegradable wallpaper having a basis weight of 220 g / m ² . <Clay coat paint> Boncoat R-3380A (acrylic emulsion manufactured by Dainippon Ink and Chemicals, Inc.) 30 parts by weight Casein (adhesive) 5 〃 Astrabright (filler made by ECC International) 20 PZ (filler made by Shiraishi Industry Co., Ltd.) ) 20 Alon T-40 (dispersant manufactured by Toagosei Co., Ltd.) 0.3 〃 Sodium benzoate (preservative manufactured by Daiwa Chemical Co., Ltd.) 1.2 〃 FA-65 (Titanium dioxide manufactured by Tohoku Chemical Co., Ltd.) 10 〃 Use paint with a solid content of 25%. <Biodegradable Colored Paint> PSM-31 (Vinyl chloride resin Kaneka) 20 parts by weight DOP (Plasticizer Nippon Reichhold) 12 〃 Whiten B (filler Shiraishi Calcium) 2 〃 Corn starch (biodegradable) Granules made by Hosei Oil Co., Ltd. 10 〃 Sodium bicarbonate (foaming agent made by Toyo Soda Co., Ltd.) 1 〃 FL-23 (stabilizer made by Adeka Argus Co.) 0.6 〃 ECON100 (made by Nippon Zeon Co., Ltd.) 2 〃 Nusol K (Diluent manufactured by Nippon Oil Co., Ltd.) 1.4 〃 S-681 (Colored pigment manufactured by Special Coloring Materials Co., Ltd.) 1 〃 A paint having a solid content of 90% is prepared by the above-mentioned composition.

Example 2 As a base paper, a laminated laminated paper No. No. 1 having a basis weight of 140 g / m ² provided with a biodegradable granular material layer and a protective fixing layer. 52 (manufactured by ERFURT RAUHFASER, made by combining wood chips on paper) was used, and the same clay coat paint and biodegradable color paint as in Example 1 were applied to one surface of the paper and dried. a fine paper having a basis weight of 60 g / m ² laminated with ethylene vinyl acetate (EVA) 5g / m ² as an adhesive to obtain a biodegradable wallpaper basis weight 185 g / m ^2.

<Example 3> [0015] As the base paper, a piece of wood scrap paper (manufactured by Nasu Paper Co.) having a basis weight of 120 g / m ² provided with a biodegradable granular material layer and a protective fixing layer was used. The same clear coat paint and biodegradable color paint as in Example 1 were applied to one surface and dried, and flame retardant paper (manufactured by Nippon Paper Industries Co., Ltd.) having a basis weight of 60 g / m ² was used as an adhesive on the back surface. Using ethylene vinyl acetate (EVA) of 5 g / m ² for lamination, a biodegradable wallpaper having a basis weight of 185 g / m ² was obtained.

<Results of Biodegradability Test> Each sample of Examples 1 to 3 was tested by the above-mentioned test method. After 6 months, 20 sheets were stacked as they were, and the vicinity of the center was not decomposed. However, it was completely disassembled for the one that was crunchy by hand and then spread and pushed 20 sheets. In addition, one year later, 20 sheets were piled up as they were, and 20 sheets were piled up by hand after being crushed, and then pushed 20 sheets were completely disassembled, and the prototype was not retained.

[0017]

[Effect of device]

 According to the present invention, by providing a layer mainly composed of biodegradable granular material as a main material of a laminate constituting a wallpaper, it is possible to provide a wallpaper that is decomposed by a normal waste treatment.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a preferred layer structure of the biodegradable wallpaper of the present invention.

[Explanation of symbols]

 1 base paper 2 biodegradable granular material layer 3 protective fixing layer 4 clay coat layer 5 patterning layer 6 backing paper

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location D21H 27/30 19/38 E04F 13/08 A 9127-2E B 9127-2E 7199-3B D21H 1 / 22 B

Claims (1)

[Scope of utility model registration request] 1. A particle diameter of 0.5 to 5 m on one surface of the base paper.
m through the biodegradable granular material (containing) layer sprinkled or coated with the biodegradable granular material of m. A biodegradable wallpaper in which patterning layers each containing 50 to 200 parts by weight of degradable granules are sequentially laminated and a backing paper is attached to the other surface.