JP2006192587A - Decorative sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative sheet capable of developing sufficient moisture absorbing and releasing properties by imparting definite air permeability and moisture permeability to the base material of the decorative sheet. <P>SOLUTION: The decorative sheet is constituted by providing at least a printing layer and a layer, in which moisture absorbent particles are dispersed, on a base material sheet layer in this order. The air permeability (JIS P 8117:1998) of the base material sheet is 10-2,000 sec and the moisture permeability (JIS: Z 0208) thereof is 100 g/m<SP>2</SP>×24h or above. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a decorative sheet to be attached to a base material such as a decorative board in a building interior material such as a wall material, a ceiling material, a joinery surface agent, a storage surface agent, and a flooring material, and particularly has a function of adjusting the humidity of the space. Relates to a decorative sheet.

  Conventionally, close-in and storage are often closed, and moisture has accumulated, causing mold and the like. As a countermeasure, not only increasing the number of calls, but also moisture-absorbing materials using calcium chloride or silica gel were used.

  However, since the above moisture-absorbing material hardly absorbs moisture at normal temperatures once it absorbs moisture, it is often disposable, requiring replacement for a certain period of time, and management is complicated. Furthermore, there is a problem that the storage is reduced because it occupies a certain space in the closet.

In view of this, the present invention has been devised in which a hygroscopic layer formed by dispersing hygroscopic particles is provided on a decorative sheet to be bonded to a base material such as a decorative board so as not to occupy a space. However, sufficient moisture absorption / release properties could not be expressed.
Japanese Patent Publication No. 7-025900

  The present invention has been made to solve such problems, and an object thereof is to provide a decorative sheet capable of exhibiting sufficient moisture absorption and desorption.

The present invention is for solving such a problem, and the invention according to claim 1 is provided with a printed layer and a layer in which hygroscopic particles are dispersed at least in this order on the base sheet layer. The base sheet has an air permeability (JIS: P8117: 1998) of 10 to 2000 seconds, and a moisture permeability (JIS: Z0208) of 100 g / m ² · 24 h or more. This is a decorative sheet.

  According to the first aspect of the invention, by providing the base material of the decorative sheet with a certain air permeability and moisture permeability, it is possible to utilize the original humidity control function of the decorative board base material on which the decorative sheet is bonded. It becomes possible.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows an example of the cross-sectional structure of the decorative sheet of the present invention. On the base sheet 1, a pattern layer 2, a layer 3 in which hygroscopic particles are dispersed, and a surface protective layer 4 are sequentially provided.

As the base material sheet 1 in the present invention, one having an air permeability (JIS: P8117: 1998) of 10 to 2000 seconds and a moisture permeability (JIS: Z0208) of 100 g / m ² · 24 h or more is used. Specifically, it is made of nonwoven fabric, cloth, vinyl chloride (hereinafter referred to as PVC) or olefin sheet, polyethylene terephthalate (hereinafter referred to as PET) film, biodegradable film, paper, etc., and has a thickness according to the material. Basis weight is applied. It is preferable if the surface is adjusted for printing.

  There is no restriction | limiting in particular as a printing ink layer used for the pattern layer 2 in this invention, A urethane resin, nitrification cotton resin, an acrylic / vinyl acetate resin, a 2 liquid-curing type urethane resin system, a vinyl chloride resin resin system, an acrylic resin, and these A resin-based gravure printing ink can be used. Dye-based and pigment-based ink jet inks can also be used, but they are selected in consideration of moisture resistance and weather resistance. In this case, the base sheet 1 is appropriately processed by a known method so that the ink can be retained. It is also possible to disperse hygroscopic particles in the ink.

  As the layer 3 formed by dispersing hygroscopic particles in the present invention, diatomaceous earth, activated clay, zeolite, charcoal is dispersed in a resin in an arbitrary ratio, polyvinyl alcohol, polyhydroxyethyl methacrylate, polyethylene glycol, A water-soluble polymer such as poly (sodium acrylate) is cross-linked, the particle size is adjusted to 0.01 to 100 μm, and dispersed in an arbitrary resin can be used.

  In addition, although the position where the layer 3 formed by dispersing hygroscopic particles is provided can be provided on the side opposite to the printing layer of the decorative sheet, in order to absorb the humidity in the air more efficiently than the base sheet. It shall be provided on the surface side, on the printed layer.

  The surface protective layer 4 in the present invention is not particularly limited, and includes urethane resin, nitrified cotton resin, acrylic / vinyl acetate resin, two-component curable urethane resin, vinyl chloride resin, acrylic resin, and mixtures thereof. Can be used arbitrarily. Moreover, you may use suitably a silicon additive, an antibacterial agent, an antifungal material, a weather resistance additive, a deodorizing agent, a flaw resistance additive, etc. as needed.

Using a paper-reinforced paper (“HPT-30” manufactured by Tenma Special Paper Co., Ltd.) with an air permeability of 40 seconds and a moisture permeability of 500 g / m ² · 24 h as a base sheet and a basis weight of 30 g / m ² , this surface A pattern of wood grain design is printed by gravure printing with a normal gravure ink as a pattern layer, and a hygroscopic agent made of sodium polyacrylate is applied in a thickness of 20 μm as a layer formed by dispersing hygroscopic particles thereon, It was dried, and a surface protective agent made of urethane resin was applied as a surface protective layer thereon to a thickness of 4 μm and dried to obtain a decorative sheet.

An impregnated paper (“GF-801” manufactured by Kojin Co., Ltd.) with an air permeability of 1500 seconds, a moisture permeability of 300 g / m ² · 24 h and a basis weight of 80 g / m ² was used as a base sheet, and a pattern layer was formed on this surface. A pattern of wood grain design is printed by gravure printing with a normal gravure ink, and a hygroscopic agent made of sodium polyacrylate is applied in a thickness of 20 μm as a layer on which hygroscopic particles are dispersed and dried. A surface protective agent made of urethane resin was applied as a surface protective layer to a thickness of 4 μm and dried to obtain a decorative sheet.

<Comparative Example 1: Air permeability and moisture permeability are out of range>
A decorative sheet was obtained in the same manner as in Example 1 except that a 12 μm thick PET film having an air permeability of 2200 seconds and a moisture permeability of 50 g / m ² · 24 h was used as the base sheet.

<Comparative example 2: The position where the layer formed by dispersing hygroscopic particles is different>
A decorative sheet was obtained in the same manner as in Example 2 except that a layer formed by dispersing hygroscopic particles was provided on the back surface of the base sheet.

<Performance comparison>
The above decorative sheet is laminated on a 2.7 mm thick plywood base material to make a decorative member. The humidity is set to 90% in a constant space (30 ° C.), and the time required for this to drop to 70%. It was measured. If it was within 120 minutes, the humidity adjustment function was passed, otherwise it was rejected. Further, the moisture absorption was measured according to JIS-A-1470. 30 g / m ² or more was accepted. The results are shown in Table 1. A plywood substrate alone is referred to as Comparative Example 3.

  The decorative sheet of the present invention is particularly a makeup for improving moisture absorption and desorption performance by sticking to a wooden substrate such as solid veneer, plywood, medium density fiberboard, particle board, insulation board, etc. It can be applied as a sheet.

It is explanatory drawing which shows an example of the structure of the cross section of the decorative sheet of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base material sheet 2 ... Pattern layer 3 ... Layer formed by dispersing hygroscopic particles 4 ... Surface protective layer

Claims (1)

A decorative sheet in which a printed layer and a layer in which hygroscopic particles are dispersed are provided in this order on a base sheet layer, and the air permeability of the base sheet (JIS: P8117: 1998) is 10 A decorative sheet characterized by having a water vapor transmission rate (JIS: Z0208) of 100 g / m ² · 24 h or more for ˜2000 seconds.

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