KR102001174B1 - Coating composition of PVC wallpaper with high hygroscopicity and moisture proof property, method of preparing PVC wallpaper using the composition and PVC wallpaper manufactured by the same - Google Patents

Abstract

The present invention relates to a coating composition for a PVC wallpaper with excellent hygroscopic and moisture-proof properties and antimicrobial and antifungal properties, which can manufacture a functional wallpaper inhibiting condensation and/or mold propagation by applying a coating agent comprising polyvinyl chloride (PVC), a hygroscopic functional resin, moisture-proof functional potassium chloride and an antimicrobial agent having antimicrobial and antifungal functions to wallpaper, a method of manufacturing the PVC wallpaper using the same, and the PVC wallpaper with excellent hygroscopic and moisture-proof properties and antimicrobial and antifungal properties manufactured thereby. A wallpaper including the coating composition according to the present invention is excellent in hydroscopic properties since the wallpaper has a moisture absorption amount of 20 to 80 g/m^2 and a moisture-proof amount of 19 to 70 g/m^2 as official test results. Therefore, the wallpaper can pleasantly maintain an indoor environment by absorbing moisture to lower indoor humidity in case of a high indoor humidity while releasing moisture to adjust the indoor humidity in case of a low indoor humidity.

Description

A coating composition for PVC wallpaper excellent in moisture absorptive and desorptive property, a method for producing PVC wallpaper using the same, and a PVC wallpaper having excellent moisture absorptive and desorptive property produced by the method. the composition and PVC wallpaper manufactured by the same}

More particularly, the present invention relates to a PVC coating composition having excellent moisture absorptive and desorptive, antifungal and antimicrobial properties, a method of producing a wallpaper using the same, and a wallpaper produced thereby. More specifically, It is possible to produce functional wallpaper that suppresses condensation and / or mold propagation by applying a coating agent containing a potassium chloride or sodium chloride, an antibacterial agent having antimicrobial and antifungal functions to wallpaper, and a PVC wallpaper excellent in antibacterial and antifungal properties Coating composition, a method of producing wallpaper using the same, and a PVC wallpaper excellent in moisture absorptive and desorptive, antibacterial and antifungal properties produced thereby.

Wallpaper is mainly used for finishing the inner wall of cement of buildings such as houses, apartments, buildings, etc., and various colors and patterns are printed to determine the indoor atmosphere according to the taste of the constructor. Such wallpaper can be broadly divided into paper according to the material, a laminated wallpaper composed of two or more pieces of paper, a vinyl wallpaper of PVC material, a textile material wallpaper, or a natural material wallpaper, and according to the structure, a flat wallpaper, embossing ) Wallpaper. Raw wallpaper is produced by gravure printing a specific pattern on the surface of woven fabric or paper backing paper. PVC wallpaper is produced by applying rotary screen or gravure printing to the backside paper by mixing PVC with plasticizer and chemical additives. PVC wallpaper is easy to re-work because paper is easily peeled off, and it is easily removed even if it gets dirty.

Generally, residential buildings such as apartment buildings and apartment buildings are deteriorated in high airtightness and high temperature for energy saving. In a building, a cement wall separating an indoor space and an outdoor space must have a condensation phenomenon due to a difference in temperature between the inside and the outside, and accordingly, the wallpaper must function as a decorative effect as well as to prevent condensation. On the other hand, in domestic climate, due to the influence of seasonal wind and the like, there are increasing causes of indoor humidity such as indoor drying of laundry, indoor bath, cooking utensil such as high temperature and high humidity in summer and low temperature drying in winter. Condensation and mold may be generated by the moisture generated in this way, or adverse health effects may be caused by low humidity. Therefore, in order to ensure a comfortable indoor environment, there is a need for an antifungal and antibacterial functional interior material that suppresses moisture absorption and desorptive property and mold propagation with both functions of absorbing or releasing moisture in the air. In particular, wall coverings are ceiling and wall interior finishes, and because of the large indoor exposure area, effective absorption / desorption, antifungal and antibacterial functions are required more.

It is an object of the present invention to provide an air conditioner which absorbs moisture in a high humidity environment and has an excellent antimicrobial and antifungal effect for preventing generation of bacteria and fungus, And to provide a coating composition for functional wallpaper which is excellent in an aesthetic sense as an interior finishing material.

It is still another object of the present invention to provide a method for producing a functional wallpaper having excellent moisture absorptive and desorptive, antimicrobial and antifungal properties using the coating composition and a PVC wallpaper produced by the method.

One aspect of the present invention for achieving the above-mentioned object is a polyvinyl alcohol composition comprising 50 to 150 parts by weight of a sodium polyacrylate salt per 100 parts by weight of polyvinyl chloride; 1 to 5 parts by weight of potassium chloride or sodium chloride; And 0.1 to 2 parts by weight of an antibacterial agent. The present invention also relates to a coating composition for PVC wallpaper which is excellent in antibacterial and antifungal properties.

Another aspect of the present invention to attain the above object is to provide a method for producing a water-repellent layer comprising a base layer nonwoven fabric or paper layer, an aqueous front print layer, a first moisture absorptive and desorptive and antimicrobial, antifungal compound layer, And a surface protective coating layer on the first and second moisture absorptive and desorptive, antimicrobial and antifungal compounding layers, and is excellent in moisture absorptive and desorptive, antibacterial and antifungal properties.

The wallpaper containing the coating composition according to the present invention has a moisture absorption of 20 to 80 g / m ² and a moisture absorption of 19 to 70 g / m ² as a result of an official test, In the case where the humidity of the room is low, the humidity of the room is regulated by releasing the moisture in the opposite direction, so that the indoor environment can be maintained comfortably. In addition, it has an excellent effect on workability because it is similar in physical properties and shapes to conventional PVC wallpaper used in the past.

1 is a cross-sectional view of a PVC foam laminated wallpaper containing a moisture absorptive and desorptive composition according to an embodiment of the present invention.
2 is a cross-sectional view of a PVC foam laminated wallpaper containing a moisture absorptive and desorptive composition according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

The present invention relates to a rubber composition comprising 50 to 150 parts by weight of a polyacrylic acid sodium salt having a hygroscopicity-imparting function to 100 parts by weight of polyvinyl chloride (PVC); 1 to 5 parts by weight of potassium chloride or sodium chloride having moisture-proof functionality; And 0.1 to 2 parts by weight of an antibacterial agent.

Specifically, the present invention is a functional coating agent based on a PVC solution, which comprises 50 to 150 parts by weight of a polyacrylic acid sodium salt based on 100 parts by weight of polyvinyl chloride. The polyacrylic acid sodium salt is a polymer of sodium acrylate and is excellent in hydrophilicity and hygroscopicity and is represented by the following formula (1). Also, it has high heat resistance and is not decomposed up to about 300 ° C.

[Chemical Formula 1]

If the polyacrylic acid sodium salt having a hygroscopicity-imparting function in the present invention is less than 50 parts by weight based on 100 parts by weight of polyvinyl chloride, the hygroscopic property may not be sufficiently exhibited. If the amount exceeds 150 parts by weight, viscosity increase and dispersibility of the coating agent Which makes it difficult to produce a uniform composition.

Next, the coating composition according to the present invention comprises 1 to 5 parts by weight of potassium chloride (KCl) or sodium chloride (NaCl) having a moisture-proofing function against 100 parts by weight of polyvinyl chloride. In the composition according to the present invention, when potassium chloride or sodium chloride is less than 1 part by weight based on 100 parts by weight of polyvinyl chloride, the moisture-proof function may not be sufficiently exhibited, and when it exceeds 5 parts by weight, the dispersibility is lowered.

Also, the coating composition according to the present invention comprises 0.1 to 2 parts by weight of an antimicrobial agent per 100 parts by weight of polyvinyl chloride. The antimicrobial agent plays a role of preventing various bacteria including fungi. Antibacterial effect can not be expected when the antimicrobial agent used is less than 0.1 part by weight with respect to 100 parts by weight of polyvinyl chloride. When the antimicrobial agent is more than 2 parts by weight, Cost can be increased. The antimicrobial agent usable in the present invention may be an imidazole-based complex agent.

Such a coating composition may be stirred at 500 to 3,500 rpm for 10 to 30 minutes to provide a functional PVC wallpaper excellent in moisture absorptive and desorptive property by being used as a coating agent in wallpaper production.

1 is a sectional view of a PVC wallpaper according to an embodiment of the present invention. The functional PVC wallpaper excellent in moisture absorptive and desorptive property according to the present invention has a base layer nonwoven fabric 10, an aqueous front print layer 20, a first moisture absorptive and desorptive and antibacterial, antifungal compounding layer 30, a second moisture absorptive and / , An antifungal compounding layer (40) and a surface protective coating layer (50).

Referring to FIG. 2, the PVC wallpaper according to another embodiment of the present invention may further include an emboss layer 60 by embossing the upper surface protective coating layer 50 to form an emboss pattern.

The PVC foamed laminated wallpaper according to the present invention is characterized in that the first and second moisture absorptive and desorptive and antibacterial and antifungal compounding layers 30 and 40 contain moisture absorbing and moisturizing and antibacterial and antifungal agents including polyvinyl chloride, sodium polyacrylate, potassium chloride or sodium chloride, Antifungal coating compositions. Wherein the coating composition comprises 50 to 150 parts by weight of a sodium polyacrylate salt having hygroscopicity-imparting ability relative to 100 parts by weight of polyvinyl chloride; 1 to 5 parts by weight of potassium chloride or sodium chloride having moisture-proof functionality; And 0.1 to 2 parts by weight of an antibacterial agent, and is excellent in moisture absorptive and desorptive property, antibacterial and antifungal function.

The coating composition according to the present invention may further contain conventional additives such as a dispersant, if necessary. The dispersing agent may be added in an amount of 1 to 2 parts by weight based on the total weight of the composition, and optionally may further include 0.1 to 5 parts by weight of a thickener or 1 to 2 parts by weight of a defoaming agent. If the dispersing agent is used in an excessive amount, the dispersing speed becomes high, and when it is applied to a woven fabric or a nonwoven fabric, the penetration becomes too much, which causes the deterioration of the quality of the product. If too small a dispersing agent is used, Further, it may further include 10 to 60 parts by weight of glycerin based on the total weight of the composition to increase moisture absorption.

The basic process for producing a polyvinyl chloride laminated wallpaper according to the present invention comprises forming an aqueous full-printing layer (20) on a base layer non-woven fabric (10) and forming a first moisture-absorbing and antibacterial and antifungal foam layer And the mixture is gelled and cooled. Then, a second moisture absorptive and desorptive, antibacterial and antifungal compounding layer 40 is formed thereon, which is gelled and then cooled. Finally, a surface protective coating layer 50 is formed on the second moisture absorptive and desorptive and antibacterial and antifungal compounding layer 40, followed by drying, gelling and drying to produce a laminated PVC wallpaper. The produced wallpaper is foamed and cooled to complete the final product.

The aqueous front print layer 20 may be formed by printing a pattern by gravure printing, rotary screen printing, offset-printing, or the like.

According to the process for producing a PVC wallpaper according to the present invention, when the first and second moisture absorptive and desorptive and antibacterial and antifungal compounding layers 30 and 40 are formed, the polyacrylic acid sodium salt having a hygroscopicity- 150 parts by weight; 1 to 5 parts by weight of potassium chloride or sodium chloride having moisture-proof functionality; And 0.1 to 2 parts by weight of an antimicrobial agent is coated on the entire surface of the water-borne front print layer 20 to prepare moisture-absorbing and moisturizing and antibacterial and antifungal compounding layers 30 and 40. At this time, although the coating composition may be coated once, a partial coating is performed two to four times in order to maximize the moisture absorptive and desorptive effect. For example, the coating composition may be coated once on the water-borne front print layer 20, and the first moisture-absorbing and antibacterial and antifungal compound layer 30 may be formed as a first coating layer. Next, the coating composition is coated once on the first moisture absorptive and desorptive, antibacterial and antifungal compound layer 30, which is a one-degree partial coating layer, and then the second coating is applied to the second coating layer. Thereby forming the mold compounding layer 40. Further, the coating composition is coated once on the second moisture absorptive and desorptive, antimicrobial and antifungal compounding layer 40 which is the second degree partial coating layer, and then the third degree partial coating is performed to form the third degree partial coating layer (not shown). Subsequently, the coating composition is coated once on the third-degree partial coating layer, and the fourth-degree partial coating is performed to form a fourth-degree partial coating layer (not shown). The coating may be carried out using a rotary screen, gravure rollers, knife coaters or comma coaters.

When the coating composition composition is coated in the order of 1 degree partial coating, 2 degree partial coating, 3 degree partial coating and 4 degree partial coating, the coating composition particles to be coated later between the pores of the coated coating composition particles are completely filled, It is possible to increase the volume of the wallpaper to be produced by increasing the contact surface between the coating agent and the air, and to increase the moisture absorptive and desorptive performance and the antibacterial performance. In addition, since the amount of the coating agent to be used can be minimized as compared with a conventional manufacturing method in which the coating is completed at one time, the cost can be reduced and the wallpaper to be manufactured can be lightened.

The surface protective coating layer 50 may be formed by gravure coating, offset printing, or rotary screen coating of a polyalkyl methacrylate, polyacrylate, vinyl chloride, or vinyl acetate copolymer composition. In addition, the embossing process is performed by forming the concave-convex pattern using an emboss roller having a positive and negative concave-convex pattern, and then cooling it. At this time, the embossed portion of the embossing roll is formed into the depressed portion of the wallpaper, and the depressed portion of the embossing roll is formed into the embossing portion.

Hereinafter, the present invention will be described in detail with reference to specific examples. The embodiments shown are merely illustrative of the present invention and are not intended to limit the scope of the present invention.

Example 1: PVC wallpaper production

A raw paper having a thickness of 0.16 mm was prepared. A mixture of 100 g of polyvinyl chloride, 57 g of superabsorbent resin of sodium polyacrylate component, 70 g of diatomaceous earth and 45 g of sodium chloride was stirred for 30 minutes under a condition of 3,000 rpm to prepare a coating composition. The coating composition thus prepared was applied on a 86T flat screen To prepare a wallpaper test specimen having a thickness of 0.6 mm.

Example 2: PVC wallpaper production

A raw paper having a thickness of 0.16 mm was prepared. A mixture of 100 g of polyvinyl chloride, 43 g of superabsorbent resin of sodium polyacrylate component, 70 g of diatomaceous earth, 5 g of potassium chloride and 57 g of glycerin was stirred for 30 minutes at 3,000 rpm for 30 minutes to prepare a coating composition. To prepare a wallpaper test specimen having a thickness of 0.7 mm.

Example 3: PVC wallpaper production

A raw paper having a thickness of 0.16 mm was prepared. A mixture of 100 g of polyvinyl chloride, 43 g of superabsorbent resin of sodium polyacrylate component, 70 g of diatomaceous earth and 5 g of potassium chloride was stirred for 30 minutes at 3,000 rpm for 30 minutes to prepare a coating composition. The coating composition thus prepared was applied on a 86T flat screen And coated twice to prepare a wallpaper test specimen having a thickness of 0.7 mm.

Example 4: PVC wallpaper production

A raw paper having a thickness of 0.16 mm was prepared. A mixture of 100 g of polyvinyl chloride, 70 g of a superabsorbent resin of sodium polyacrylate component, 15 g of diatomaceous earth and 6 g of potassium chloride was stirred for 30 minutes under a condition of 3,000 rpm to prepare a coating composition. The coating composition thus prepared was applied to a gravure laver To prepare wallpaper having a thickness of 0.5 mm.

Example 5: PVC wallpaper production

A raw paper having a thickness of 0.16 mm was prepared. A mixture of 100 g of polyvinyl chloride, 70 g of superabsorbent resin of sodium polyacrylate component, 15 g of diatomaceous earth and 6 g of potassium chloride was stirred for 30 minutes at 3,000 rpm for 30 minutes to prepare a coating composition. The coating composition thus prepared was applied on a flat 86T screen To prepare a wallpaper having a weight of 315 g / m < 2 > and 0.45 mm.

Example 6: PVC wallpaper production

A wallpaper having a weight of 385 g / m 2 and 0.45 mm was prepared in the same manner as in Example 6 except that the plate was coated twice with 86T screen.

Example 7: PVC wallpaper production

A raw paper having a thickness of 0.16 mm was prepared. 100 g of polyvinyl chloride, 125 g of superabsorbent resin of sodium polyacrylate component and 1 g of potassium chloride were stirred at 3,000 rpm for 30 minutes to prepare a coating composition. The coating composition thus prepared was coated on a rotary screen to give a weight of 315 g / M < 2 >, and 0.9 mm wallpaper.

Example 8: PVC wallpaper production

A raw paper having a thickness of 0.16 mm was prepared. 100 g of polyvinyl chloride, 135 g of superabsorbent resin of sodium polyacrylate component, and 1 g of potassium chloride was stirred at 3,000 rpm for 30 minutes to prepare a coating composition. The coating composition thus prepared was coated on a rotary screen to give a weight of 315 g / M < 2 >, 0.8 mm wallpaper.

Example 9: PVC wallpaper production

A raw paper having a thickness of 0.16 mm was prepared. 100 g of polyvinyl chloride, 135 g of superabsorbent resin of sodium polyacrylate component, and 1 g of potassium chloride was stirred at 3,000 rpm for 30 minutes to prepare a coating composition. The coating composition thus prepared was coated on a rotary screen to give a weight of 315 g / M < 2 >, and 0.9 mm wallpaper.

<Evaluation of Moisture Absorption and Desorption Performance>

The evaluation of the moisture absorptive and desorptive performance was carried out according to the moisture absorptive and desorptive test method of KS F 2611: 2009 building materials. The evaluation conditions are shown in Table 1 below and the evaluation results are shown in Table 2 below.

According to the above Table 2, the functional PVC wallpaper according to the present invention has moisture absorption of 20 to 80 g / m ² and moisture absorption of 19 to 70 g / m ² , which is excellent in humidity control. Therefore, when the indoor humidity is high, When the humidity of the room is low, the humidity is adjusted to the room humidity by releasing the moisture, and the indoor environment can be maintained comfortably.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The true scope of protection of the present invention is defined by the following claims rather than the detailed description, and the scope of protection of the present invention should be construed as the scope of the claims and their equivalents.

Claims (8)

50 to 150 parts by weight of a polyacrylic acid sodium salt based on 100 parts by weight of polyvinyl chloride (PVC); 1 to 5 parts by weight of potassium chloride or sodium chloride; 0.1 to 2 parts by weight of an imidazole-based antimicrobial agent; And 10 to 60 parts by weight of glycerin. Description: TECHNICAL FIELD [0001] The present invention relates to a coating composition for wallpaper, which has moisture absorptive and desorptive, antibacterial and antifungal properties. The coating composition according to claim 1, wherein the coating composition is prepared by stirring the polyacrylic acid sodium salt, the potassium chloride or sodium chloride, and the antibacterial agent at 500 to 3,500 rpm for 10 to 30 minutes. Coating composition for a wallpaper. A base layer nonwoven fabric; Aqueous front print layer; A first moisture absorptive and desorptive and antibacterial and antifungal compounding layer; A second moisture absorptive and desorptive and antibacterial and antifungal compounding layer; And a surface protective coating layer sequentially from the bottom, wherein the first and second moisture absorptive and desorptive and antibacterial and antifungal compounding layers comprise the coating composition according to claim 1 or 2, PVC wallpaper with antifungal properties. [4] The PVC wallpaper according to claim 3, wherein the PVC wallpaper further comprises an emboss layer on the surface protective coating layer, wherein the PVC wallpaper has moisture absorptive and desorptive, antibacterial and antifungal properties. Forming an aqueous overprinting layer on the substrate layer nonwoven fabric; Forming a first moisture absorptive and desorptive, antibacterial and antifungal compounding layer on the aqueous front print layer; Forming a second moisture absorptive and desorptive, antibacterial and antifungal compounding layer on the first moisture absorptive and desorptive antibacterial and antifungal compounding layer; And forming a surface protective coating layer, wherein the forming of the first moisture-absorbing, antibacterial and antifungal compounding layer comprises coating the coating composition according to claim 1 or 2 once on the aqueous front print layer Wherein the second moisture-absorbing, antibacterial and antifungal compounding layer is formed by a one-step partial coating, and the second moisture-absorbing, antibacterial and antifungal compounding layer is formed by performing a two-step partial coating Wherein the particles of the coating composition used in the second degree partial coating are filled between the voids of the coating composition particles used in the first degree partial coating. 6. The method of claim 5, further comprising: forming a third degree partial coating layer on the second moisture absorptive and desorptive, antimicrobial, and antifungal compound layer by coating the coating composition once; And forming a 4-degree partial coating layer by conducting a 4-degree partial coating by coating the coating composition once on the 3-degree partial coating layer to manufacture a PVC wallpaper having antibacterial and antifungal properties Way. [6] The method of claim 5, wherein the coating is performed using a rotary screen, a gravure roller, a knife coat or a comma coater. The method according to claim 5, wherein the step of forming the aqueous front surface printing layer and the surface protective coating layer is performed using gravure printing, rotary screen printing, or offset-printing A method for producing PVC wallpaper having moisture absorption, moisture absorption, antibacterial and antifungal properties.

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