JP2009248506A - Decorative sheet and decorative material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative sheet which is configured to include at least a pattern layer having transparency and a transparent resin layer in this order on a substrate and suppresses the occurrence of mold, and to provide a decorative material. <P>SOLUTION: In the decorative sheet configured to include at least the pattern layer 7 and the transparent layer 8 in this order on a wood substrate 5, the moisture vapor transmission rate of the transparent resin layer is 60.0 g/(m<SP>2</SP>24h) or higher (measurement method is based on JIS-K-7129-1992) and the resin of the transparent layer is made of polylactic acid. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention is a decorative material used for building materials and materials for indoor consumer goods. In particular, it improves design while taking advantage of embossing (conduit unevenness pattern) and shine of wood substrates, and is transparent with high moisture permeability. The present invention relates to a decorative sheet using a resin layer and a decorative material in which the sheets are laminated.

  Conventionally, as a decorative plate used as a surface material for interior and furniture, a veneer decorative plate in which a single wood plate is bonded to the surface of a base material has been widely used. However, due to the depletion of natural resources, especially hardwood materials such as cherry, oak, teak, and walnut, these patterns have been applied to substrates such as plywood and MDF (Medium Density Fiberboard) as an alternative to veneer veneer using these materials. A decorative board in which a printed decorative sheet is bonded is often used.

  However, with this method, there is a limit to the expression of so-called shine, wood texture, and conduit shape inherent to wood. Therefore, as a method of expressing the feeling of shine and wood texture, a decorative sheet made of transparent polyolefin resin with a hardwood wood grain pattern printed on the back of a thin and flat wood substrate made of relatively easy-to-obtain coniferous wood is used. The method of making the decorative material excellent in the design property reflecting the so-called shine feeling and the wood texture that the wood originally has was considered.

However, when applying the decorative material as described above to the wall surface, if the hook is attached and applied after the decorative material is bonded to the steel plate, it is sandwiched between the decorative sheet on the surface of the decorative plate and the steel plate, and thus is derived from the wooden base material Moisture and moisture of the water-based emulsion adhesive are difficult to dry. Then, wrinkles sometimes grew on the wooden base material.
Japanese Patent No. 3672636 JP 2007-16091 A

  The present invention has been made in order to solve these problems. That is, the object of the present invention is a makeup in which a transparent pattern layer and a transparent resin layer are provided at least in this order on a wood substrate. An object of the present invention is to provide a decorative sheet and a decorative material in which generation of wrinkles is suppressed in the sheet.

The present invention solves this problem, that is, the invention according to claim 1 is a decorative sheet in which a picture pattern layer and a transparent resin layer are provided in this order on a wood substrate. Is a decorative sheet characterized by having a water vapor transmission rate of 60.0 g / (m ² · 24 h) (measurement method conforms to JIS-K-7129-1992) or more.

  The invention according to claim 2 is the decorative sheet according to claim 1, wherein the resin of the transparent resin layer is made of polylactic acid.

  The invention described in claim 3 is characterized in that an adhesive layer made of an aqueous emulsion adhesive having transparency after drying is provided between the wood substrate and the pattern layer. The decorative sheet according to any one of the above.

  Moreover, invention of Claim 4 provides an aqueous | water-based adhesive layer, a nonwoven fabric, and an aqueous | water-based adhesive layer in this order at least on this on a decorative material base material, The Claims 1-3 of Claim 1 is provided on it in that order. A cosmetic material comprising a decorative sheet.

  According to the present invention, when the decorative material is applied to the wall surface, even if the decorative material is bonded to the steel plate and then attached to the hook, the hook is attached to the surface of the decorative plate and is derived from the wooden base material sandwiched between the decorative sheet and the steel plate. Moisture and moisture in the aqueous emulsion adhesive permeate the decorative sheet and evaporate. Therefore, the effect that wrinkles do not grow on a wooden base material is acquired.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cross-sectional structure of an embodiment of the decorative sheet and the decorative material of the present invention. The decorative material substrate 1, the adhesive layer A2, the nonwoven fabric 3, the adhesive layer B4, the wood substrate 5, the adhesive layer C6, the pattern layer 7, the transparent resin layer 8, and the surface protective layer 9 provided as appropriate are laminated in this order. Being done.

Although it does not specifically limit as the decorative material base material 1 in this invention, It is suitable that it has a nonflammability from the target place. Specifically, a calcium silicate plate having a thickness of about 6 to 12 mm, a gypsum board having a thickness of 9 to 12.5 mm, a volcanic glassy multilayer substrate having a thickness of 3 to 28 mm, a steel plate having a thickness of 0.8 to 1.2 mm, and a ceramic industry A cement board or the like can be used. In addition, thickness can use other than the above. Although not shown, it is desirable that the urethane resin sealer is applied and dried in an amount of 5 to 30 g / m ² after drying as an alkali stopper.

The adhesive layer A2 adheres between the decorative material base 1 and a non-woven fabric 3 described later. Urethane modified ethylene / vinyl acetate polymer aqueous emulsion adhesive (solid content 54 wt%, viscosity around 10,000 mPa · S), two-component urethane resin aqueous emulsion, vinyl acetate resin aqueous emulsion, which becomes transparent after drying, One-component moisture-curing urethane hot melt resin, epoxy resin adhesive, acrylic resin pressure-sensitive adhesive, and the like are preferable in terms of adhesive strength. The coating amount after drying is preferably about 10 to 120 g / m ² .

  The nonwoven fabric 3 is preferably made of vinylon fiber having a basis weight of about 10 to 60 g. The nonwoven fabric 3 has a role of preventing cracking of the wood substrate 5 described later and facilitating handling.

  Adhesive layer B4 adheres between the nonwoven fabric 3 and the wood substrate 5 described later, and can be used with the same material and coating amount as adhesive layer A2.

  The wood substrate 5 according to the present invention may be any material as long as its surface pattern is suitable as a decorative material, and use a hardwood material that lacks an effective conduit pattern by overlapping with a pattern layer 7 described later. However, it may be made of coniferous wood, or an artificial veneer made of a use tree species that has not been illegally harvested and is produced by afforestation. Specifically, the veneer of the tree species youth (African triprochiton genus Aogiriaceae) produced by afforestation sliced to a thickness of about 0.3 mm, conifers of other tree species, rosewood, etc. can be used. Artificial veneers can also be used.

  The adhesive layer C6 is for bonding the wood substrate and the transparent resin layer 8, and can be used with the same material and application amount as the adhesive layer A2 and the adhesive layer B4.

  As the pattern layer 7, an ink obtained by adding a pigment or the like to a two-component urethane resin binder (matrix) is preferably used. However, the ink is not particularly limited, and the adhesiveness with each layer to be laminated is considered. What is necessary is just to select suitably. The pattern layer 7 is intended to improve the design properties in consideration of the design of the surface of the wood substrate from the surface side, and has a color that can be seen through, or a partially transparent portion. The object can be achieved by providing an opaque part, but is not particularly limited as long as the design can be improved.

As the transparent resin layer 8, the resin, additives, and layer thickness are adjusted so that the water vapor transmission rate is 60.0 g / (m ² · 24 h) (measurement method conforms to JIS-K-7129-1992) or more. It becomes. If the water vapor transmission rate is about 10 g / m ² · 24 h, it is equivalent to a waterproof and moisture-resistant decorative sheet. Even if it is about 40 g / (m ² · 24 h), the water vaporization of the water-based adhesive etc. can be realized. Have difficulty. Considering the cost effectiveness, the upper limit is preferably about 300 g / (m ² · 24 h). The layer thickness is preferably about 10 to 120 μm, and most preferably 20 to 90 μm.

  Although it does not specifically limit as resin used for the transparent resin layer 8, For the use for indoor consumer goods material etc. from recent environmental measures, a plant-derived polylactic acid (Poly Lactic Acid) resin is preferable. In addition to polylactic acid resin, other biomass materials and biodegradable resins, colorants, antioxidants, UV absorbers, heat stabilizers, plasticizers, lubricants, charging, as long as they do not affect their physical properties and plant origin You may add 1 or more types of conventionally well-known various additives, such as an inhibitor, a flame retardant, a filler, a hydrolysis inhibitor, and a nucleating agent.

  Biomass materials and biodegradable resins are added as appropriate to improve heat resistance. Specifically, polyhydroxybutyrate, polybutylene succinate, polybutylene succinate, polycaprolactone, acetic acid Cellulose-based, polyesteramide-based, vinyl acetate-based, and starch-based materials can be appropriately selected, and a single type or a mixture of plural types may be used.

  Examples of the ultraviolet absorber include benzotriazole, triazine, and benzoimine. In addition, a hindered amine or a hindered phenol light stabilizer may be added as appropriate. Thereby, weather resistance is provided to the plant-derived decorative sheet-attached decorative material of the present invention.

  On the transparent resin layer 8, an adhesive resin layer (not shown) such as polyethylene resin or polypropylene resin modified with acid, in particular maleic acid, in order to improve adhesion with the surface protective layer 9 appropriately provided thereon. ) May be provided as appropriate. The adhesive resin layer is preferably provided by coextrusion molding with the transparent plant-derived resin base material 8, but is not particularly limited to this method.

  The surface protective layer 9 provided as appropriate can be provided as appropriate in order to enhance various surface properties. Specifically, a two-component urethane resin, an ultraviolet curable resin, an electron beam curable resin, or the like can be used. Moreover, you may add additives, such as a ultraviolet absorber and a photoinitiator, suitably.

As the wood substrate 5, a veneer of a tree species Ayous (African triprositone genus (Aogiriaceae)) produced by afforestation sliced in length and width of 300 mm and thickness of 0.3 mm was used.
A vinylon fiber (rice basis weight 30 g) is used as the nonwoven fabric 3, and an urethane-modified ethylene / vinyl acetate polymer aqueous emulsion adhesive (solid content 54 wt%, viscosity 10,000 mPa · S) that becomes transparent after drying on both sides. Then, it was applied as 60 g / m ² before drying to form an adhesive layer A2 and an adhesive layer B4. Thereafter, the adhesive layer B4 side was bonded to the back surface of the wood substrate 5.

As the transparent resin layer 8, a 20 μm-thick polylactic acid resin film (“Palgreen LC” manufactured by Tosero Co., Ltd.) was used. The water vapor transmission rate was 250.0 g / (m ² · 24 h) (measurement method conforming to JIS-K-7129-1992).

After corona treatment is applied to both surfaces of the transparent resin layer 8, a gravure coat is formed by blending 100 parts by weight of a two-part curable urethane topcoat agent with 0.5 parts by weight of a silicone resin-type liquid-repellent on the surface side. The surface protective layer 9 was prepared by applying the coating amount after drying by the method to 3 g / m ² , drying and curing.
Then, on the back side of the transparent resin layer 8, a wood grain pattern was formed by a gravure printing method with a transparent ink to obtain a picture pattern layer 7.

Then, an aqueous emulsion adhesive of urethane-modified ethylene / vinyl acetate polymer (solid content 54 wt%, viscosity 10,000 mPa · S) is applied to the surface side of the wood substrate 5 as 60 g / m ² before drying. It provided as agent layer C6, this was bonded together the side in which the said pattern layer 7 of the said transparent resin layer 8 was provided, and the decorative sheet was obtained.

A commercially available calcium silicate plate having a thickness of 6 mm was used as the decorative material base 1, and although not shown, an aqueous urethane resin sealer was applied to this surface as a sealing agent so that the coating amount after drying was 10 g / m ² . This surface was bonded to the adhesive layer A2 of the decorative sheet, and the whole was pressed (30 N / cm ² ) with a press at 30 to 50 ° C. to obtain a decorative material.

<Comparative Example 1>
As the transparent resin layer 8, a biaxially stretched polypropylene resin (water vapor transmission rate was 10.0 g / (m ² · 24h) (measurement method conforming to JIS-K-7129-1992)) was used. Obtained a decorative sheet and a decorative material in the same manner as in Example 1.

<Performance evaluation and results>
Example 1 and Comparative Example 1 were laminated on a galvanized steel sheet having a thickness of 0.5 mm with a two-part epoxy resin adhesive having an application amount of 20 g / m ² . Then, when left in a constant temperature and humidity chamber at 40 ° C. and 90% RH (relative humidity) for 1 month, no wrinkles were formed in Example 1, but wrinkles were produced in Comparative Example 1.

  It is a decorative material used for building materials and indoor consumer goods materials. In particular, it uses the embossed (concavity and convexity pattern) and shine of the wood substrate to improve design, and uses plant-derived materials with high moisture permeability. And can be used as a decorative material in which the sheets are laminated.

It is explanatory drawing which shows the structure of the cross section of one Example of the decorative material of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cosmetic material base material 2 ... Adhesive layer A
3 ... Nonwoven fabric 4 ... Adhesive layer B
5 ... wood substrate 6 ... adhesive layer C
7 ... Pattern pattern layer 8 ... Transparent resin layer 9 ... Surface protective layer

Claims (4)

In a decorative sheet in which a pattern layer and a transparent resin layer are provided in this order on a wood substrate, the water vapor transmission rate of the transparent resin layer is 60.0 g / (m ² · 24 h) (measurement method is JIS-K -7129-1992)) or more.   The decorative sheet according to claim 1, wherein the resin of the transparent resin layer is made of polylactic acid.   The decorative sheet according to any one of claims 1 and 2, wherein an adhesive layer made of an aqueous emulsion adhesive having transparency after drying is provided between the wood substrate and the pattern layer. A water-based adhesive layer, a nonwoven fabric, and a water-based adhesive layer are provided at least in this order on the decorative material base material, and the decorative sheet according to any one of claims 1 to 3 is provided thereon. Make up cosmetics.

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