KR20100009187A - Wallpaper comprising corn component with enhanced chemical-resistance - Google Patents

Abstract

PURPOSE: Corn starch-containing wallpaper having improved chemical resistance is provided to offer environmentally friendly good effects with strong chemical resistance, and to emit volatile organic compounds without a plasticizer. CONSTITUTION: Corn starch-containing wallpaper is formed with three-layered structure having a printing layer, a supporting layer, and a backing layer. The printing layer and the supporting layer includes starch of 10~30 parts by weight, one or more selected from diatomite and silicate of 10~30 parts by weight, calcium carbonate of 5~20 parts by weight and titanium oxide of 1~5 parts by weight based on the resin of 100 parts by weight consisting of one or two kinds of compounds selected from ethylenevinylacetate copolymer resin and polyolefin elastomers. The ethylenevinylacetate copolymer resin has the acetate content of 10~50 weight%. The backing layer is made of polypropylene nonwoven fabric, polyester non-woven fabric, or bond paper.

Description

Wallpaper comprising corn component with enhanced chemical-resistance

The present invention is environmentally friendly and environmentally friendly by containing a biodegradable component such as corn starch, wherein each constituent layer of the wallpaper consisting of three layers of a print layer, a support layer, and a backing layer is excluded a substance causing a sick house syndrome, which is a substance causing endocrine disorders. To chemically enhanced wallpaper containing corn starch

Currently, most commonly used wallpaper is PVC-based, and PVC contains chlorine in the polymer chain, which generates dioxin, which is classified as a carcinogen or endocrine disruptor, or generates highly corrosive hydrogen chloride gas. Plasticizers, which are essential for PVC processing, are mostly defined as endocrine disruptors. In addition, the wallpaper has a problem of shortening the durability and lifespan of the wallpaper by discoloring or discoloring the wallpaper by an alkali component such as ammonia generated when the paper is applied to an acidic grass or when curing a new building or concrete of an existing building. In particular, the problem is more serious in the case of wallpaper containing a vegetable component such as starch.

The present invention is to solve the conventional problems as described above, an object of the present invention does not contain a plasticizer, does not generate hydrogen chloride gas or dioxin during combustion, volatile organic compounds such as formaldehyde, toluene, xylene is not released In addition, the chemical resistance of acid resistance, alkali resistance is strengthened, and it is naturally decomposed in the soil at the time of landfill to provide an eco-friendly, corn starch containing wallpaper that meets the health and safety of human life.

The wallpaper according to the present invention is a laminated wallpaper consisting of a three-layer structure of a print layer / support layer / backing layer, wherein the print layer and the support layer are one of ethylene vinyl acetate (EVA) copolymer resin and polyolefin elastomer alone or 10 to 30 parts by weight of corn starch, 10 to 30 parts by weight of diatomaceous earth and silicate, 5 to 20 parts by weight of calcium carbonate, and 1 to 5 parts by weight of titanium oxide, based on 100 parts by weight of the basic resin formed by mixing the two kinds. It includes, the backing layer is characterized in that consisting of one kind selected from polypropylene nonwoven fabric, polyester nonwoven fabric and white paper.

The ethylene vinyl acetate copolymer resin included in the print layer and the support layer preferably has a vinyl acetate content of 10 to 50% by weight, and a melt flow index of 0.3 to 20 g / 10 minutes, wherein the vinyl acetate content is outside the above range. It is not preferable because sheet molding required for surface wallpaper processing is impossible, and if the melt flow index is less than 0.3 g / 10 min, the resin flow property is lowered, and if it exceeds 20 g / 10 min, the mechanical properties deteriorate.

The polyolefin elastomer included in the print layer and the support layer has a density of 0.85-0.90 g / cm ³ , and a melt flow index (Melt Index) of 0.1-20 g / 10 min is preferable in view of resin processability and mechanical properties.

The corn starch contained in the print layer and the support layer is used to reduce formaldehyde emissions, reduce substances causing sick house syndrome, and to decompose in the soil during landfill to provide an environmentally friendly wallpaper. 4 ~ 7, average particle size is 100 ~ 200㎛, water content is 15% by weight or less, it is preferable to improve the kneading with other materials and the decomposition speed at the time of landfill disposal when sheet processing necessary for wallpaper processing, the content is Although it is preferable that it is 10-30 weight part, when it is less than 10 weight part, decomposition performance falls and it is unpreferable, and when it exceeds 30 weight part, it is unpreferable from a viewpoint of wallpaper workability and mechanical properties.

The diatomaceous earth and silicate included in the print layer and the support layer can absorb or absorb alkali components such as ammonia gas generated during concrete curing, which is the main cause of discoloration, thereby increasing chemical resistance and preventing wallpaper discoloration. . The diatomaceous earth has an average particle size of 0.5 ~ 2㎛, pore size (pore size) is preferably less than 0.1㎛, silicate is an average particle size of 0.5 ~ 5㎛, pore size is preferably 0.1㎛ or less, diatomaceous earth If the average particle size and pore size of the and silicate are outside of the above ranges, the adsorption or absorption capacity of the alkaline component may be degraded, which may cause discoloration of the wallpaper.

The content of the diatomaceous earth and the silicate is preferably 10-30 parts by weight of at least one selected from diatomaceous earth and the silicate with respect to 100 parts by weight of the base resin, but less than 10 parts by weight is inferior to sulfidation resistance, 30 It is not preferable to exceed the weight part because sheet forming necessary for wallpaper processing is impossible.

The calcium carbonate contained in the print layer and the support layer is preferably used 5 to 20 parts by weight with respect to 100 parts by weight of the basic resin, but less than 5 parts by weight is not desirable to hide the wallpaper, more than 20 parts by weight. The workability of the resin composition is lowered, which is not preferable.

The titanium oxide contained in the print layer and the support layer is preferably used in an amount of 1 to 5 parts by weight based on 100 parts by weight of the base resin, but less than 1 part by weight, the whiteness of the wallpaper is not preferable, The workability of the resin composition is lowered, which is not preferable.

In the wallpaper according to the present invention, the printed layer is formed by imparting a printed pattern on a layer having the composition described above by a conventional printing technique.

As the backing layer included in the wallpaper according to the present invention, a polypropylene nonwoven fabric, a polyester nonwoven fabric or a white paper may be used.

The wallpaper according to the present invention is not only an environmentally friendly wallpaper that reduces harmful volatile organic compounds such as formaldehyde and endocrine obstructions, thereby reducing the sick house syndrome, and has excellent chemical resistance and improved durability.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the protection scope of the present invention is not limited by these Examples.

Example  And Comparative example

Comparative example  1 and 2 and Example  1-19

A print layer and a support layer were formed of the composition consisting of the components and contents as shown in Table 1 and Table 2, respectively, and the white paper was used as the backing layer. Comparative Example 1 is a commercial PVC wallpaper on the market. For each wallpaper of Examples and Comparative Examples, formaldehyde emission was measured according to KS F3111, and sulfidation resistance was measured based on KS K0910 to measure the chemical resistance, and the results are shown in Table 2.

Property measurement method

① Melt Index

According to ASTM D1238 it was measured with a load of 2.16 kg at 230 ℃.

Table 1

Ethylene Vinyl Acetate Copolymer Resin Polyolefin elastomer Vinyl acetate content (% by weight) Melt Flow Index (g / 10min) Density (g / cm 3) Melt Flow Index (g / 10min) Comparative Example 1 - - - - Comparative Example 2 10 One - - Example 1 10 0.3 - - Example 2 20 5 - - Example 3 50 20 - - Example 4 10 5 - - Example 5 10 5 - - Example 6 10 5 - - Example 7 10 5 - - Example 8 10 5 - - Example 9 10 5 - - Example 10 10 5 - - Example 11 50 20 - - Example 12 - - 0.85 0.1 Example 13 - - 0.85 10 Example 14 - - 0.85 20 Example 15 - - 0.90 0.1 Example 16 - - 0.90 10 Example 17 10 5 0.88 10 Example 18 10 5 0.88 20 Example 19 10 5 0.88 20

TABLE 2

                                                       (Unit: parts by weight)

Ethylene Vinyl Acetate Copolymer Resin Polyolefin elastomer Corn starch Calcium carbonate Titanium oxide Diatomaceous earth Silicate Formaldehyde Release (mg / ℓ) Sulfurization resistance (grade) Comparative Example 1 - - - - - - - 1.5 2nd class Comparative Example 2 100 - - 10 3 - - 0.2 2nd class Example 1 100 - 17 10 3 10 10 0 Grade 4 Example 2 100 - 17 10 3 10 10 0 Grade 4 Example 3 100 - 17 10 3 10 10 0 Grade 4 Example 4 100 - 17 10 3 10 0 0 Grade 4 Example 5 100 - 17 10 3 20 0 0 Grade 4 Example 6 100 - 17 10 3 30 0 0 Grade 5 Example 7 100 - 17 10 3 0 10 0 Grade 4 Example 8 100 - 17 10 3 0 20 0 Grade 4 Example 9 100 - 17 10 3 0 30 0 Grade 5 Example 10 100 - 17 10 3 15 15 0 Grade 5 Example 11 100 - 17 10 3 15 15 0 Grade 5 Example 12 - 100 17 10 3 10 10 0 Grade 4 Example 13 - 100 17 10 3 10 10 0 Grade 4 Example 14 - 100 17 10 3 10 10 0 Grade 4 Example 15 - 100 17 10 3 30 0 0 Grade 5 Example 16 - 100 17 10 3 0 30 0 Grade 5 Example 17 50 50 17 10 3 15 15 0 Grade 5 Example 18 50 50 17 10 3 15 15 0 Grade 5 Example 19 40 60 17 10 3 15 15 0 Grade 5

As can be seen in Table 2, when comparing the formaldehyde emission amount of Examples 1 to 19 and Comparative Examples 1 and 2, it can be seen that the formaldehyde is not released at all in the embodiment, which is environmentally friendly building materials quality It is a numerical value corresponding to five crowbars (less than 0.03 mg / m ² h) of the certification of the certification agent, and it can be seen that the sulfidation resistance of the example is higher than the grade 2 level of the comparative example with the grade 4 or more.

Claims (6)

A laminated structure comprising a three-layer structure of a printed layer / support layer / backing layer, wherein the printed layer and the support layer are 100 parts by weight of a basic resin formed by mixing one or two of ethylene vinyl acetate copolymer resin and polyolefin elastomer. About 10 to 30 parts by weight of corn starch, at least 10 to 30 parts by weight of diatomaceous earth and silicate, 5 to 20 parts by weight of calcium carbonate and 1 to 5 parts by weight of titanium oxide. The wallpaper of claim 1, wherein the ethylene vinyl acetate copolymer resin has a vinyl acetate content of 10 to 50% by weight and a melt flow index of 0.3 to 20 g / 10 minutes. The wallpaper of claim 1, wherein the polyolefin elastomer has a density of 0.85 to 0.90 g / cm ³ and a melt flow index of 0.1 to 20 g / 10 minutes. The wallpaper of claim 1, wherein the corn starch is a white powder having a pH of 4-7, an average particle size of 100-200 µm, and a water content of 15% or less. According to claim 1, The diatomaceous earth has an average particle size of 0.5 ~ 2㎛, Pore size of 0.1㎛ or less, The silicate has an average particle size of 0.5 ~ 5㎛, Pore size is 0.1㎛ or less wallpaper . The wallpaper according to any one of claims 1 to 5, wherein the backing layer is made of polypropylene nonwoven fabric, polyester nonwoven fabric or white paper.