JP3271022B2 - Decorative sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet to be attached to various kinds of furniture, building interior materials and the like for the purpose of decoration or surface protection, and more particularly to a decorative sheet suitable for expressing an uneven pattern such as wood grain. Regarding the board.

[0002]

2. Description of the Related Art As a conventional decorative material, a decorative sheet in which a transparent polyvinyl chloride film is laminated after printing on a polyvinyl chloride film by a usual method, and a three-dimensional appearance are produced. In order to improve the design, after the transparent polyvinyl chloride film of the decorative sheet is laminated, embossing is performed, and further, ink is filled into the recesses of the emboss to express, for example, a wood grain conduit pattern. Such decorative sheets are also known.

[0003]

However, in the above prior art, a polyvinyl chloride film is often used as a base material of a decorative sheet, and hydrochloric acid gas generated at the time of incineration disposal treatment is used as the polyvinyl chloride film. It has the disadvantage of adversely affecting the environment and being inferior in physical properties such as heat resistance and cold resistance and chemical properties such as solvent resistance.

The present invention has been made in view of such a problem, and an object of the present invention is to be environmentally friendly,
Moreover, a cosmetic sheet with a high-performance, highly-designed uneven surface
To provide the service easily and reliably.

[0005]

The gist of the present invention for solving the above-mentioned problems is that the gas generated at the time of incineration disposal does not adversely affect the environment, and the physical properties such as heat resistance and cold resistance and resistance to cold. It has excellent performance in chemical properties such as solvent properties.

According to the present invention, a base substrate layer, a opaque colored solid layer, a pattern printing layer, a transparent resin layer and a surface protective layer are laminated in order from the bottom, and the base substrate layer is a colored unstretched polypropylene film. A printing layer in which the opaque colored solid layer is made of an acrylic urethane-based or chlorinated polypropylene-based ink, an adhesive layer in which the transparent resin layer is made of a rubber-based, acrylic, epoxy-, or urethane-based resin, and the surface protective layer Comprises a polypropylene resin layer.

An embossing process is performed on the surface of the surface protective layer to form an embossed recess, and a top coat layer is provided after the embossed recess is filled with ink by wiping to reproduce a design closer to natural wood. It is.

[0008]

The decorative sheet of the present invention is a product having a stable color tone which can cope with variations in the surface hue of the decorative board substrate by providing a concealable solid layer using a polypropylene film as a base material of the decorative sheet. In addition, the gas generated during waste incineration does not contain toxic hydrochloric acid gas because it uses a polypropylene resin layer or a polyethylene resin layer as a surface protective layer, and it also has resistance to solvents and chemicals. It also acts to enhance chemical properties such as.

[0009]

Embodiments will be described below with reference to the drawings.

FIG. 1 shows the laminated structure of the first embodiment, FIG. 2 shows the laminated structure of the second embodiment, FIG. 3 shows the laminated structure of the third embodiment, and FIG. 4 shows the laminated structure of the fourth embodiment. It is a sectional view showing each, as can be seen from these figures, the decorative sheet,
Base substrate layer 1, opaque colored solid layer 2, picture printing layer 3,
It comprises a transparent resin layer 4, a surface protection layer 5 and a top coat layer 6.

The base substrate layer 1 is preferably made of a polyolefin resin film or a polyester resin film from the viewpoint of safety of organic gas generated at the time of incineration disposal, and a pattern printing layer formed on the surface of a decorative sheet. In order to maintain the color tone stability and the hiding power capable of coping with the variation in the surface hue of the decorative board substrate, a colored material of a polyolefin resin film, particularly a polypropylene film can be suitably used.

As the coloring pigment of the polypropylene film, commonly used organic or inorganic pigments can be used. As the white pigment for maintaining the hiding property, titanium dioxide,
Inorganic pigments such as zinc white and antimony trioxide are suitable, and the addition amount is preferably 10 to 20%.

[0013] There are two types of polypropylene film, stretched type and unstretched type. The non-stretched type has excellent flexibility in wrapping, V-cut, etc. and excellent heat shrinkage rate. Is preferred.

The opaque colored solid layer 2 is provided between the base substrate layer 1 and the picture printing layer 3. The purpose of forming the opaque colored solid layer 2 is to provide opaque performance with the opaque colored solid layer 2 even if the opacity of the colored polypropylene film layer itself is insufficient.
There is an advantage that designability can be improved by adding a coloring agent.

The ink used to form the opaque colored solid layer 2 includes pigments, if necessary, in the vehicle.
Coloring agents such as dyes, extender pigments, solvents, stabilizers, plasticizers, catalysts, those appropriately mixed with a curing agent, and the like, include known ink vehicles, such as cellulose derivatives, styrene resins, acrylic resins, Thermoplastic resins such as vinyl polymers, phenolic resins, unsaturated polyester resins, epoxy resins, and thermosetting resins such as polyurethane resins can be used. It is preferable to use a chlorinated polypropylene resin, an acrylic urethane resin, or a vinyl polymer resin in one liquid or two liquids from the viewpoint of adhesion to a sheet substrate, flexibility, and the like. Gravure printing, as the ink layer forming method,
Or, a normal coating method such as roll coating is used.

The pattern printing layer 3 includes, for example, wood grain, stone grain,
A print representing the surface pattern, cloth texture, abstract pattern, etc. of natural leather is attached, and any known vehicle can be used as an ink vehicle for providing the arbitrary pattern, but it is used for the opaque colored solid layer 2. It may be the same as the one. As the surface on which the print pattern is provided, printing may be performed on the opaque colored solid layer 2 or may be performed below the transparent polypropylene film 51 used as a surface protective layer.

The transparent resin layer 4 is provided between the pattern printing layer 3 and the surface protection layer 5 to improve the adhesive strength between them, but it is also necessary to increase the thickness of the total sheet layer. In some cases, it is provided in order to impart suitability for curved surface processing such as winding of wood ends and V-cuts, and to further increase the sense of design durability.

As a method for forming the transparent resin layer 4, a rubber-based resin,
A method of coating an acrylic, epoxy, or urethane resin by a dry lamination method, a method of extrusion coating a polyolefin resin such as polyethylene or other resin by an extrusion lamination method, and the like are used. Further, in order to increase the thickness of the total sheet layer and to impart suitability for curved surface processing and a feeling of durability, a method of extrusion-coating a polyolefin resin is desirable.

As the surface protective layer 5, a polyolefin resin such as a polypropylene resin or a polyethylene resin is used. A colorless or colored transparent film is bonded by heat bonding, or the resin is extrusion-coated by extrusion. It is formed. The thickness of the surface protective layer 5 is preferably from 10 to 100 μm.

As the base material for a decorative sheet having a concave portion, a transparent polyolefin resin film made separately from the printed surface of the base material layer to which printing is applied is bonded by heat bonding or extruded. While laminating by coating,
A so-called doubling embossed sheet obtained by shaping the surface of a laminated sheet by embossing, and particularly manufactured separately from a polypropylene film having a printed surface. Most preferably, the laminated sheet obtained by doubling and embossing the transparent polypropylene film is used as a base material for a decorative sheet.

Next, a paint or ink is used as the coloring filler 7 filled in the concave portion of the surface protective layer 5.
For example, natural resins or modified resins thereof, cellulose derivatives, synthetic resins such as polyvinyl chloride-based resins, acrylic resins, polyester-based resins, and polyurethane-based resins are used as the constituent materials of the vehicle. A paint or ink containing a pigment, a plasticizer, or the like is used. As a vehicle to be used, it is preferable to use a resin of the same system as the resin in which the concave portion is formed. As the wiping method, any of conventionally used wiping methods such as a doctor blade method and a roll coating method may be used.

The top coat layer 6 may be colorless and transparent, or may be colored and transparent, and may be matte and transparent. The top coat layer 6 is provided for adjusting the glossiness of the surface of the decorative sheet. Yes, but it also has a role in surface protection. The top coat layer 6 is formed by applying a paint using an appropriate vehicle, and the vehicle includes a phenol resin,
One or a mixture of two or more thermosetting resins such as an unsaturated polyester resin, an epoxy resin, and a polyurethane resin can be used. Usually, an appropriate amount of matting agent is dispersed in the paint for forming the top coat layer 6 to give a desired glossiness, but the matting agent includes mica, silica, alumina,
Calcium carbonate, diatomaceous earth, quartz sand, shirasu balloon and the like are used. As a method of applying the paint, a method such as gravure coating, roll coating, and air knife coating is used.

Example 1 An unstretched white polypropylene film (FAKCW-BT, manufactured by Nimura Chemical Co., Ltd.) having a thickness of 40 μm was coated with an ink (U-PAC, manufactured by The Inktec) using a chlorinated polypropylene resin as a vehicle. A concealed solid layer and a printed layer similar to an oak wood grain pattern were printed by a gravure rotary press using three colors of ink. On this printing film, a polyurethane-based resin ink (The Inkstec, TIS-
7) to form a transparent resin layer. Then, the transparent resin layer and a transparent polypropylene film (FAK-BT, manufactured by Nimura Chemical Co., Ltd.) having a thickness of 40 μm are stacked, and a preheating drum temperature of 1
10 ° C, Teflon roll temperature 130 ° C, nip pressure 1t,
By laminating both at a lamination speed of 10 m / min, a decorative sheet having a polypropylene film layer was obtained.

Example 2 In the laminating step of Example 1, the two were laminated and simultaneously embossed to form a concave portion corresponding to a wood grain conduit on the surface of the transparent polypropylene film. Next, a coloring ink (manufactured by Showa Ink, W141) is applied by a roll coating method to the laminated sheet having the embossed concave portions formed on the surface thereof, and then the doctor blade is used to coat the other portions except for the concave portions. The colored ink adhering to the portion was removed, and the colored paint was filled and solidified in the concave portion formed on the surface of the laminated sheet. A VACPP-WP OP varnish (manufactured by Inktec Co., Ltd.) was coated with a gravure roll having a plate depth of 60 μm to obtain a decorative sheet having a polypropylene film layer on the surface and an uneven surface.

Example 3 An isocyanate-based adhesive was applied at 2 g / m 2 to the pattern printing layer of the unstretched white polypropylene film of Example 1,
40μ low density polyethylene by extrusion
A decorative sheet having a coated polyethylene layer was obtained by extrusion coating to a film thickness of m.

Example 4 A low-density polyethylene was extrusion-coated by extrusion in Example 3, and the thickness was 60 μm.
A decorative sheet having a polyethylene film layer on the surface was obtained by sand laminating a transparent low-density polyethylene film.

[0027]

As described above, the decorative sheets of the present invention are laminated as described above, so that it is possible to cope with variations in the surface hue of the decorative board substrate and to supply a product having a stable color tone as a thin film. It has the effect of being able to do it.

Further, since no polyvinyl chloride film is used, physical properties such as heat resistance and cold resistance and chemical properties such as chemical resistance are excellent, and incineration for thin film laminated sheet of polyolefin resin film. Since the amount of gas generated at the time of disposal is small, and toxic hydrochloric acid gas is not included, it is environmentally friendly.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a laminated structure of a decorative sheet according to a first embodiment.

FIG. 2 is a cross-sectional view illustrating a laminated structure of a decorative sheet according to a second embodiment.

FIG. 3 is a cross-sectional view showing a laminated structure of a decorative sheet according to a third embodiment.

FIG. 4 is a cross-sectional view showing a laminated structure of a decorative sheet according to a fourth embodiment.

[Explanation of symbols]

 Reference Signs List 1 base substrate layer 2 opaque colored solid layer 3 picture printing layer 4 transparent resin layer 41 adhesive layer 42 anchor coat layer 43 coated polyethylene layer 5 surface protective layer 51 transparent polypropylene film layer 52 coated polyethylene layer 53 polyethylene film layer 6 top Coat layer 7 Colored filler

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Seiji Kawahara 1-1-1 Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. (56) References Japanese Patent Laid-Open No. 2-128843 (JP, A) JP-A-2-277622 (JP, A) JP-A-4-73112 (JP, A) JP-A-60-34834 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B32B1 / 00-35/00

Claims (2)

(57) [Claims] 1. A base material layer, a opaque colored solid layer, a pattern printing layer, a transparent resin layer, and a surface protective layer which are laminated in order from the bottom, wherein the base material layer is a colored unstretched polypropylene film, The printing layer composed of an acrylic urethane-based or chlorinated polypropylene-based ink, the transparent resin layer is composed of a rubber-based, acrylic-based, epoxy-based, or urethane-based resin, and the adhesive layer and the surface protective layer are each made of a colored solid layer. A decorative sheet comprising a polypropylene resin layer. 2. The method according to claim 1, wherein the surface of the surface protective layer is embossed to form an embossed concave portion, the ink is filled into the embossed concave portion by wiping, and then a top coat layer is provided. The cosmetic sheet according to claim 1.