JP2002113995A - Decorative sheet and decorative material - Google Patents

Abstract

[57] [Abstract] [Problem] Eliminates the need for advanced coating technology and large-scale coating equipment, can reduce the environmental load such as the generation of waste solvent and solvent odor, and is characteristic of coating cosmetics. Easy-to-use dry-type construction method makes it easy to apply a high-quality feel, such as design and painting, that takes advantage of the original texture of the base material for complex cosmetics, even to cosmetic base materials with complex three-dimensional shapes. Provided are a decorative sheet that can be provided, and a decorative material using the same. A decorative sheet for vacuum forming, comprising mainly a colorless or colored transparent or translucent thermoplastic resin film having suitability for vacuum forming and having an internal haze value of 10% or less. And a decorative material obtained by laminating the decorative sheet 1 on a surface of a decorative material base material 2 having a three-dimensional shape by a vacuum forming method.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to interior and exterior materials and building materials for buildings such as houses, construction materials such as fittings, furniture and fixtures, interior materials for transportation equipment such as vehicles, housing equipment and home electric appliances, and the like. The present invention relates to a decorative sheet for use in surface makeup and a decorative material using the decorative sheet.

[0002]

2. Description of the Related Art Conventionally, in order to use natural wood and veneer for surface materials such as furniture and doors, the texture, design and durability are improved by applying paint to the surface of natural wood and veneer. The technique has been widely used. As a problem of the wet coating method, there are artisan techniques for coating without generating uneven coating and large-scale coating equipment for uniformly coating a large-area base material for cosmetic materials. In addition to the necessity, as a wood coating, it is common to use a solvent-based coating that is easy to adapt to the wood structure, so a large-scale drying equipment for volatilizing and evaporating the solvent contained in the coating in a large amount, It requires a curing period to sufficiently dry and solidify the paint, and has a large environmental impact, such as the disposal of waste solvent and the generation of solvent odor in the painting process. Poor shielding against
There have been many problems, such as the drying and cracking of the base material for cosmetic material due to aging.

[0003] In recent years, in particular, with the diversification of consumer preferences and the trend toward higher quality, the demand for various cosmetic materials having a complicated three-dimensional three-dimensional shape has been increasing more and more. The production of decorative materials using a decorative material base material formed into a three-dimensional shape by cutting or assembling a tree, forming a curved surface of a veneer, and the like is also steadily increasing. However, it is extremely difficult to apply a uniform coating to the entire surface of the base material for a cosmetic material having such a complicated three-dimensional three-dimensional shape. There are problems such as low productivity due to the long time required for the work, and even if the painting work is automated by a machine, for example, a precise painting device by numerical control is required, and the burden of capital investment is At present, it has many problems, such as being large and taking time to set the optimum coating conditions.

As described above, instead of the wet coating method which is troublesome and has a large environmental load, a printed decorative sheet formed by printing a pattern such as wood grain on a thermoplastic synthetic resin sheet such as a polyvinyl chloride resin sheet is used. Cosmetic materials manufactured by laminating and adhering to the surface of any base material for a cosmetic material via an adhesive have been widely used conventionally. Further, decorative materials in which the printed decorative sheet is laminated and adhered while being formed by a vacuum forming method or the like along the surface of a decorative material substrate having a complicated three-dimensional three-dimensional shape have already been widely used. But,
As described above, in the decorative material using the printed decorative sheet, the original texture of the material such as the grain of the surface of the base material for the decorative material is hidden by the printed decorative sheet, and the design by printing of the printed decorative sheet is exclusively observed from the surface. Since it is only a natural wood or veneer, its design is planar, artificial, and inferior in design feeling when compared with a painted decorative material in which natural wood or veneer is painted. In addition, it is extremely difficult to reproduce the unique high-grade paint feeling, such as the glossiness, depth, depth, etc., of paint cosmetics by the method of printing wood grain patterns on thermoplastic synthetic resin sheets. There was a problem that it is.

As described above, instability of the quality in the wet coating method, problems in facilities, productivity, and environment, and problems in the design in the laminating method of the printed decorative sheet are caused by natural materials as a base material for decorative materials. The present invention is not limited to the use of a wood-based base material such as wood or veneer. For example, a cosmetic using any base material for a decorative material such as a metal-based base material such as a steel plate or an inorganic base material such as a cement board. It can be said that this is a problem common to wood.

[0006]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above-mentioned problems in the prior art. Eliminating the burden on the environment, such as waste solvent and solvent odor, without the need for sophisticated coating equipment, and a design that makes use of the original texture of the base material for cosmetics, which is characteristic of coating cosmetics A decorative sheet and a decorative material using the same, which can easily provide a high-grade feeling such as a feeling of painting or the like to a base material for a decorative material having a complicated three-dimensional three-dimensional shape by a simple dry method. To provide.

[0007]

In order to solve the above-mentioned problems, the present invention mainly comprises a colorless or colored transparent or translucent thermoplastic resin film having vacuum forming suitability, and has an internal haze value. It is intended to provide a decorative sheet for vacuum forming, characterized in that it is not more than 10%,
In addition, another object of the present invention is to provide a decorative material characterized in that the decorative sheet is laminated and adhered to the surface of a decorative material base material having a three-dimensional shape by a vacuum forming method.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 4, a decorative sheet 1 of the present invention is formed on a surface of a decorative material base material 2 having a three-dimensional shape by a vacuum forming method along the three-dimensional shape. A decorative sheet 1 to be laminated and adhered while being formed, so that the surface of the decorative material substrate 2 can be seen through, so that the original texture of the material of the decorative material substrate 2 can be fully utilized; The decorative sheet 1 is mainly composed of a thermoplastic resin film having vacuum forming aptitude, and has high transparency such that the internal haze value of the decorative sheet 1 as a whole is at least 10% or less.

As a specific structure of the decorative sheet 1 of the present invention, for example, as shown in FIG. 1, at least a colorless or colored transparent or translucent thermoplastic resin film having a vacuum forming suitability is provided. 11 is provided. In addition to the base sheet 11, the decorative sheet 1 of the present invention can be formed by appropriately laminating one or more selected from, for example, a surface protective layer 12, a picture layer 13, an adhesive layer 14, and the like as needed. However, it goes without saying that these layers also need to be colorless or colored transparent or translucent.

The material of the base sheet 11 used in the decorative sheet 1 of the present invention is sufficiently softened by the heat of about 80 to 140 ° C. during vacuum forming to form a complicated three-dimensional three-dimensional shape of the base material 2 for the decorative material. It is not particularly limited as long as it is a thermoplastic resin film having vacuum forming aptitude that can be formed along, for example, polyolefin resin, polyester resin, acrylic resin, styrene resin, polyvinyl resin, polyurethane Films or sheets made of a thermoplastic resin such as a base resin, a polyamide resin, a polyimide resin, a cellulose derivative, or a mixture of two or more thereof, a copolymer, or a laminate can be used. In addition, from the viewpoint of vacuum forming suitability, it is desirable to use one having a glass transition temperature or a heat softening temperature of about 60 to 85 ° C.

The base sheet 11 may be colored by adding a coloring agent as long as the surface of the base material 2 for cosmetic material can be seen through. In addition, if necessary, for example, ultraviolet absorbers, light stabilizers, heat stabilizers, plasticizers, fillers, flame retardants, gloss regulators, antistatic agents, anti-condensation agents, lubricants, antibacterial agents, fungicides, etc. One or more selected from various additives may be added.

If the thickness of the base material sheet 11 is too small, breakage or drawdown is liable to occur during vacuum forming, and the coating feeling and surface physical properties after the lamination of the base material 11 on the decorative material base material 2 are insufficient. On the other hand, if the thickness is too large, the flexibility of the decorative sheet 1 is reduced, and the ability to follow a complicated three-dimensional shape is deteriorated.
Since it is uneconomical, it is usually desirable that the thickness be in the range of about 20 to 250 μm.

The hardness and abrasion resistance of the surface of the substrate sheet 11,
When the surface properties such as scratch resistance, abrasion resistance, solvent resistance, chemical resistance, and stain resistance are insufficient, the surface protection is performed to impart various surface properties related to the surface of the base sheet 11. Tier 1
2 can also be provided. The material of the surface protective layer 12 is not particularly limited in the present invention, but it is preferable to use a curable resin from the viewpoint of various surface properties. Specifically, for example, a urethane resin, an amino alkyd resin, a melamine resin, an epoxy resin, an unsaturated polyester resin, a urea resin, a thermosetting resin such as a phenol resin, an unsaturated polyester resin, An ionizing radiation-curable resin, such as an acrylate-based resin or a methacrylate-based resin, which is cured by irradiation with ultraviolet light or an electron beam or the like can be used.

Above all, a two-part curable urethane resin excellent in balance between surface physical properties such as surface hardness and abrasion resistance and elongation and flexibility suitable for vacuum forming, that is, acrylic polyol or acrylic ether is used. A thermosetting resin or the like, which is a main component and is crosslinked and cured by adding an isocyanate curing agent, is most suitable for the purpose of the present invention. Surface protective layer 12
The thickness is not particularly limited in the present invention, but if it is too thin, various surface properties may be insufficient, and if it is too thick, vacuum forming workability may be impaired.
Suitably, it is about 0 μm.

If necessary, the surface protective layer 12 may be, for example, an ultraviolet absorber, a light stabilizer, a heat stabilizer, a gloss regulator, a lubricant,
One or more selected from various additives such as an antistatic agent, an anti-condensation agent, an antibacterial agent, an antifungal agent, a lubricant, a coloring agent, and a filler may be added. Further, the surface protective layer 12 may be composed of two or more layers of the same type or different types. For example, the first layer containing high-hardness wear-resistant particles such as silica, alumina, and silicon carbide may be used.
A second layer not containing the particles is provided on the layer of
To achieve both abrasion resistance and scratch resistance, surface gloss and surface smoothness, and to form a second layer having a different gloss state on the first layer provided on the entire surface in an arbitrary pattern. It is also possible to apply such as providing a visual three-dimensional effect by a gloss change.

If the decorative sheet 1 of the present invention needs to be designed with a picture or colored to a desired color, the base sheet 1
The pattern layer 13 can be applied to the front surface or the back surface of the device 1. As shown in FIG. 1, the pattern layer 13 is preferably provided on the back surface side of the base material sheet 11, that is, on the side of the surface to be adhered to the base material 2 for decorative material, after being attached to the base material 2 for decorative material. There is an advantage that the picture layer 13 is protected by the base sheet 11 and a cosmetic material having excellent abrasion resistance and solvent resistance of the picture and color can be obtained.

The picture layer 13 is a picture of a desired design expressed by printing or the like, and it is sufficient that at least the surface of the base material 2 for cosmetic material has transparency or transparency enough to be seen through. There are no restrictions on the type of the pattern, the constituent materials, the forming method, and the like. In order to make the pattern layer 13 transparent or transparent, a method of printing using a transparent ink using a transparent pigment as a colorant, or using a transparent or opaque ink is used. Thus, a method of printing in a pattern with many omissions such as a halftone dot can be used. However, if an opaque ink is used, the internal haze of the decorative sheet 1 may be increased. Therefore, it is preferable to use a transparent ink in the present invention.

The pattern formed by the pattern layer 13 is generally, for example, a wood pattern, a stone pattern, an abstract pattern, a geometric pattern, characters or symbols, or a combination thereof. Of course it is good. Further, for example, when the base material 2 for a decorative material is a wooden base material, the pattern layer 13 may be a decorative material such as a transparent or see-through wood grain pattern, a colored transparent solid layer of a tea system, or the like. By providing a pattern layer 13 of a pattern or color that is in harmony with the texture of the base material 2, it is possible to obtain a high-design decorative material that makes full use of the texture of the base material 2.

As a constituent material of the picture layer 13, for example, a urethane resin, an acrylic resin, a vinyl resin, a polyester resin, a cellulose derivative or the like is used as a vehicle, and a coloring agent such as a dye or a pigment is dispersed therein. Printing inks or paints can be used. As a method of forming the picture layer 13, for example, a known printing method such as a gravure printing method, an offset printing method, a gravure offset printing method, a screen printing method, a flexographic printing method, a letterpress printing method, an inkjet printing method, or a solid state printing method Known methods include, for example, gravure coating, microgravure coating, roll coating, knife coating, air knife coating, die coating, lip coating, comma coating, dip coating, flow coating, spray coating, etc. Can be used.

The adhesive layer 14 is provided for bonding the decorative sheet 1 to the decorative material substrate 2, and the surface of the decorative material substrate 2 immediately before lamination on the decorative material substrate 2. And / or may be applied to the back surface of the decorative sheet 1. However, as shown in FIG. 1, if it is provided in advance on the back surface of the decorative sheet 1, the adhesive may be applied immediately before the laminating step by the vacuum forming method. It is not necessary to apply the adhesive, and the coating and drying equipment for the adhesive is not required.
It is possible to manufacture cosmetics of stable quality with high productivity without problems such as difficulty in applying the adhesive uniformly on the surface of the product and deterioration of the quality of the cosmetic material of the product due to uneven application of the adhesive. There are advantages.

The decorative sheet 1 is used as the adhesive layer 14.
In the wound and stored state, the adhesive does not exhibit adhesiveness, and is melted or softened by heat at about 80 to 140 ° C. so that adhesiveness is exhibited by heating during vacuum forming and adheres to the base material 2 for decorative material. It is desirable to use an adhesive that is solid at room temperature, that is, a hot-melt adhesive (or a heat-sensitive adhesive), which has a property of exhibiting adhesiveness and then solidifying by cooling to adhere firmly.

The type of the hot-melt adhesive is not particularly limited, and may be selected from conventionally known hot-melt adhesives such as polyurethane resin, ethylene-vinyl acetate copolymer resin, polyamide, polyester and polyolefin. What is necessary is just to select suitably what was used according to the material of the base material sheet 11 and the base material 2 for decorative materials, and to use it. Above all, when a reaction-curable hot-melt adhesive such as a moisture-curable polyurethane-based adhesive containing an isocyanate group is employed, there is an advantage that the heat-resistant adhesiveness after the adhesive curing is excellent.

Although the thickness of the adhesive layer 14 depends on the material and surface condition of the base material 2 for a decorative material, it is generally 5 to 50 μm.
Degree is a range usually used, and among them,
m is most preferable. Examples of the method for forming the adhesive layer 14 include a roll coating method, a comma coating method, a gravure coating method, a microgravure coating method, a rod coating method, a flow coating method, a knife coating method, an air knife coating method, a die coating method, and a lip coating method. It can be arbitrarily selected from various conventionally known coating methods such as a coating method, a spray coating method, and an applicator method.

The form of the decorative sheet 1 of the present invention is not limited to the above, but can be variously changed without departing from the spirit of the present invention. For example, the base sheet 1
1 is not limited to a configuration consisting of only one layer,
It may be composed of a laminate of two or more layers. FIG.
FIG. 3 shows an example in which the base sheet 11 is formed of a two-layer laminate of a top sheet 15 and a back sheet 16.

In the example shown in FIG. 2, the picture layer 13 is provided between the top sheet 15 and the back sheet 16.
Since the picture layer 13 is also protected from the back surface by the back sheet 16, the solvent component at the time of applying the adhesive layer 14 and the exudate from the base material 2 for cosmetic material (for example, the resin component from the wood base material). When the pattern layer 13 is not liable to be affected by the image layer 13 or an alkali component from the inorganic base material, or when a pattern other than a solid color is provided as the pattern layer 13, the pattern layer 13 and the decorative material base 2 Since a distance is generated by the thickness of the back sheet 16 between them, there is an advantage that the positional relationship between the two changes depending on the viewing angle, and a three-dimensional design feeling can be obtained. On the other hand, as shown in FIG. 3, when a configuration in which the back sheet 16 and the top sheet 15 are sequentially laminated on the front side of the picture layer 13 is employed, the thickness of the transparent layer on the front side of the picture layer 13 can be sufficiently ensured. There is an advantage that a decorative material excellent in design feeling such as painting feeling, depth feeling, depth feeling and various surface properties can be easily obtained.

As described above, the base material sheet is
When the decorative sheet 1 is composed of two layers, namely, the back sheet 16 and the back sheet 16, the two are made of different materials, and the advantages of each material are used to compensate for the disadvantages. A cosmetic material can be obtained relatively easily. For example, it is often difficult to achieve compatibility between the flexibility and thermoformability of a thermoplastic resin and surface properties such as surface hardness and solvent resistance. However, the surface sheet 15 has surface properties such as surface hardness and solvent resistance. By using a thermoplastic resin having excellent flexibility and thermoformability as the back sheet 16, the decorative sheet 1 as a whole is excellent in all of their performances. Obtainable.

More specifically, for example, if the decorative sheet 1 is made of a thermoplastic polyester resin, the surface sheet 15 is a biaxially stretched polyethylene which is inferior in flexibility and thermoformability but high in strength and excellent in various surface properties. A crystalline polyester resin such as a terephthalate resin film is used as the back sheet 16. 1,4-Cyclohexanedimethanol copolymer polyester resin having high transparency, excellent flexibility and thermoformability, but low surface hardness and solvent resistance. If a non-crystalline polyester resin such as is adopted, the decorative sheet 1 as a whole is made of a single resin such as flexibility, thermoformability, transparency, surface hardness, scratch resistance, solvent resistance, and chemical resistance. A decorative sheet 1 that simultaneously satisfies various performances that are difficult to satisfy at the same time can be easily realized.

In the above example, if it is difficult to sufficiently compensate for the lack of thermoformability of the topsheet 15 made of the crystalline polyester resin by the backsheet 16 made of the non-crystalline polyester resin, The crystalline polyester resin constituting No. 15 is placed in an amorphous state before laminating and adhering to the base material 2 for decorative material, and is formed along the surface of the base material 2 for decorative material by a vacuum forming method. At the same time, the amorphous polyester resin constituting the topsheet 15 is crystallized by the heat during vacuum forming to utilize the excellent flexibility and thermoformability of the crystalline polyester resin in the amorphous state. In addition, sufficient surface properties can be imparted to the produced cosmetic material.

The amorphous polyester resin includes, for example, polyethylene terephthalate resin, polybutylene terephthalate resin, polyethylene naphthalate resin, etc.
It is molded into a sheet under molding conditions in which any polyester resin that is originally crystalline is not crystallized (preferably, the degree of crystallinity is 5% or less). As the crystalline polyester resin sheet in the amorphous state, the most common one is a pure or almost pure polyethylene terephthalate resin commercially available as a so-called A-PET resin,
Specifically, for example, “Teijin Tetron sheet (A-PET)” manufactured by Teijin Limited and “Toyobo P” manufactured by Toyobo Co., Ltd.
Examples include commercially available products such as "ETMAX sheet A series" and "Kanebo A-PET sheet" manufactured by Kanebo Co., Ltd.

On the other hand, the non-crystalline polyester resin used for the back sheet 16 may be a thermoplastic polyester resin having a low crystallization rate so as to hardly crystallize under ordinary resin molding conditions. Specifically, in a condensation polymerization reaction of a dicarboxylic acid such as terephthalic acid or an ester thereof and a diol such as ethylene glycol, as the dicarboxylic acid, for example, sebacic acid, eicoic acid, dodecanedioic acid, dimer acid, cyclohexanedicarboxylic acid, or the like. A long-chain aliphatic dicarboxylic acid and / or an alicyclic dicarboxylic acid is introduced, and / or a polyether diol such as polyethylene glycol, polytetramethylene glycol, cyclohexane dimethanol and / or an alicyclic diol component as a diol component. Copolymers obtained by introducing diol There is Le resin. Among them, the most representative is 1,4-commercially available as PET-G.
It is a cyclohexane dimethanol copolymerized polyethylene terephthalate resin, and as a sheet made of the resin, specifically, for example, "NAGASE A-" manufactured by Nagase & Co., Ltd.
PET "and" Rivester "manufactured by Riken Vinyl Industrial Co., Ltd. are commercially available.

The topsheet 15 made of an amorphous crystalline polyester resin has sufficient flexibility and thermoformability to withstand the formation of a complicated three-dimensional three-dimensional shape in the initial amorphous state, and has a vacuum. Partial crystallization (depending on heating conditions etc., usually about 30-60% crystallinity) through a heating step during molding provides excellent surface hardness, scratch resistance, solvent resistance, It exhibits chemical properties and the like, and contributes to the realization of various cosmetic materials having excellent various surface physical properties.

As described above, the decorative sheet described above is a back sheet made of an amorphous polyester resin which maintains excellent flexibility, thermoformability and transparency without being crystallized under heating conditions during vacuum forming. 16 is the main component, and has sufficient flexibility and thermoformability since its surface is in an amorphous state before undergoing a heating step at the time of vacuum forming, and is excellent in being crystallized by passing through a heating step. By laminating the surface sheet 15 made of an amorphous crystalline polyester resin which expresses various surface physical properties, the excellent flexibility, thermoformability, transparency, etc. peculiar to the amorphous polyester resin are fully utilized. In addition, it is possible to easily obtain a cosmetic material having excellent surface physical properties.

In the decorative sheet 1, the top sheet 1
5 and 85.degree. C. are selected as the amorphous crystalline polyester resin constituting the amorphous polyester resin 5 and the amorphous polyester resin constituting the back sheet 16, a conventional polyvinyl chloride resin decorative sheet is used. The molding operation can be performed efficiently under substantially the same molding conditions as in the case of (1). For example, the above-mentioned 1,4-cyclohexanedimethanol copolymerized polyethylene terephthalate resin has a glass transition temperature of 80 ° C., exhibits good thermoformability in combination with its excellent flexibility, and has a complicated three-dimensional three-dimensional shape. The decorative sheet 1 excellent in followability with respect to the above can be obtained.

Top sheet 15 in decorative sheet 1
Regarding the relationship between the thickness of the back sheet 16 and the thickness of the top sheet 15, if the thickness of the top sheet 15 is too thin, various surface properties such as surface hardness, scratch resistance, solvent resistance, and chemical resistance will be sufficient even after molding and crystallization. Since it may not be obtained, it is preferable that the thickness is at least 1 μm or more, usually 5 μm or more. On the other hand, if it is too thick, it may cause a decrease in transparency (increase in haze) or a decrease in surface gloss due to crystallization during molding. Normally, the thickness is desirably 50 μm or less because the design may be impaired. The thickness of the back sheet 16 is the total thickness of the decorative sheet 1 (2
0 to 250 μm is desirable) and the top sheet 15
Is appropriately designed in consideration of the thickness of the top sheet 15.
If the thickness is too small compared to the thickness of the decorative sheet 1, sufficient thermoformability cannot be obtained as a whole, so that the thickness ratio between the back sheet 16 and the top sheet 15 is in the range of about 95: 5 to 60:40. It is desirable to design it to be inside.

The method of laminating the top sheet 15 and the back sheet 16 is not particularly limited. For example, a dry lamination method or a wet lamination method with an adhesive, a heat lamination method with or without an adhesive, a melt extrusion method, or the like. Any conventionally known laminating method such as a laminating method and a co-extrusion simultaneous film forming method can be appropriately employed.

The vacuum forming method, which is a method of laminating and attaching the decorative sheet 1 to the decorative material substrate 2 according to the present invention, refers to a method in which the decorative sheet 1 is spread on the surface of the decorative material substrate 2 while heating and softening. , While reducing the pressure of the space on the side of the decorative material substrate of the decorative sheet,
This is a method in which the decorative sheet 1 is laminated and adhered by pressing the space on the opposite side while forming the decorative sheet 1 along the surface shape of the decorative material base material 2. FIG. 4 is a schematic cross-sectional view of an example of the decorative material thus manufactured.

The vacuum forming method includes heating the decorative sheet 1 and pressing the decorative sheet 1 against the surface of the decorative material base 2 due to the pressure difference between the space on the decorative material base 2 side and the space on the opposite side. Is applied via a flexible and elastic membrane rubber such as a silicone rubber film stretched on the side opposite to the decorative material substrate 2 of the decorative sheet 1, and a so-called membrane press method. There is a so-called membraneless press method in which the decorative sheet 1 is directly heated without using the decorative sheet 1 and the decorative sheet 1 itself is used as a pressing force impressing medium. Conventionally, the former has been the mainstream in Japan and the latter has been the mainstream overseas. In recent years, however, the adoption of the latter has been increasing in Japan because of its high moldability and productivity. Of course, both are applicable to the present invention.

As the base material 2 for the decorative material, for example, solid wood of natural wood, veneer, plywood, laminated wood, medium density fiber board, hard fiber board, particle board, oriented board, veneer laminate, etc. Various types of wood-based materials are the most typical ones. In addition, metal-based materials such as steel plates, brass plates, stainless steel plates, aluminum plates, and duralumin plates, and natural stone materials, glass, ceramics, and gypsum plates , Slag gypsum board, calcium silicate board, slate board, wood wool cement board, asbestos cement board, glass fiber reinforced concrete board, inorganic base material such as lightweight aerated concrete board, etc. The present invention can be applied to a base material for a cosmetic material made of any kind of material as long as the material is possible.

[0039]

EXAMPLES Specific examples of the decorative sheet and the decorative material of the present invention are shown below, and the present invention will be described in more detail.

Example 1 An amorphous polyethylene terephthalate resin (A-PET) layer having a thickness of 20 μm and an amorphous 1
A transparent urethane resin based on a PET-G layer surface of a transparent polyester resin film having a thickness of 100 μm and an internal haze value of 1% formed by co-extruding a 4-cyclohexanedimethanol copolymerized polyethylene terephthalate (PET-G) layer. A wood grain pattern is printed by a gravure printing method using a printing ink, and a transparent ethylene-vinyl acetate copolymer resin-based hot melt adhesive having a softening point of 100 ° C. is applied on the printing surface by a gravure coating method. The decorative sheet was applied to a thickness of 30 μm to produce a decorative sheet of the present invention having an internal haze value of 4% as the whole decorative sheet.

Comparative Example 1 In Example 1, a milky white polyester resin film in which a titanium dioxide pigment was added to the PET-G layer of the transparent polyester resin film and the internal haze value was adjusted to 25% was used. Under the same conditions as in Example 1, a decorative sheet having an internal haze value of 27% as the entire decorative sheet was produced.

Comparative Example 2 A wood grain pattern was printed on the surface of a 100 μm thick opaque colored polypropylene resin film by a gravure printing method using a urethane resin printing ink.
A decorative sheet was prepared by laminating a 100-μm-thick transparent polypropylene-based resin film via a two-component curable urethane resin-based dry laminating adhesive.

Vacuum Forming Processing Test Laminated wood base material cut and formed into the shape of a kitchen door having a three-dimensional uneven shape as shown in FIG. 4 using the decorative sheets of Example 1 and Comparative Examples 1-2. Was laminated and adhered to the surface of the sample by a vacuum forming method to produce a desired decorative material (kitchen door). The evaluation results of the obtained decorative material are as shown in the table below.

Performance Comparison Table Example 1 Comparative Example 1 Comparative Example 2 Prior application of adhesive to base material Not required Not required Necessary Adhesive strength Good Good Good Designability Good Bad Somewhat poor Material feeling Good Bad Bad Wood grain design Good Bad Good

As described above, the decorative material obtained by using the decorative sheet of the present invention exhibits a rich material feeling by utilizing the texture and shine of the woody fiber structure on the surface of the laminated wood substrate. The wood grain pattern inherent in the laminated wood base material and the transparent wood grain pattern by printing are fused together to give a deep natural wood grain design, and this gives the paint feeling with the transparent resin sheet which is the base sheet of the decorative sheet. A three-dimensional decorative material having extremely excellent design properties full of a natural feeling and a luxurious feeling can be obtained as a whole with a sense of depth and a sense of depth.

[0046]

As described in detail above, the decorative sheet of the present invention is mainly composed of a colorless or colored transparent or translucent thermoplastic resin film having vacuum formability, and has an internal haze value of 10%. Since it is a decorative sheet for vacuum forming as described below, it is laminated and adhered to the surface of a decorative base material having a three-dimensional shape by a vacuum forming method, so that the texture of the decorative base material originally has It is possible to easily impart excellent design properties due to the coating feeling of the thermoplastic resin film layer. In addition, large-scale painting and drying facilities for applying paint to a base material for a cosmetic material having a complicated three-dimensional three-dimensional shape, as in the conventional wet coating method, are not required at all, resulting in poor quality such as uneven coating. Without this, a cosmetic material of uniform quality can be stably manufactured with good workability by a simple dry method. Further, since the decorative sheet is superior in strength and durability as compared with the coating film, and also functions as a shielding layer against moisture, moisture, corrosive gas, etc. Many remarkable practical effects are exhibited, such as deterioration of the quality of the cosmetic material such as thinning, deterioration and deformation due to moisture absorption and release, and warpage.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a decorative sheet of the present invention.

FIG. 2 is a schematic sectional view showing an embodiment of the decorative sheet of the present invention.

FIG. 3 is a schematic sectional view showing an embodiment of the decorative sheet of the present invention.

FIG. 4 is a schematic sectional view showing an embodiment of the decorative material of the present invention.

[Explanation of symbols]

 1 ‥‥‥ Decorative sheet 11 ‥‥ Base sheet 12 ‥‥ Surface protection layer 13 ‥‥ Picture layer 14 ‥‥ Adhesive layer 15 ‥‥ Surface sheet 16 ‥‥ Back sheet 2 ‥‥‥ Cosmetic material base material

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) // B29K 67:00 B29K 67:00 105: 20 105: 20 B29L 31:44 B29L 31:44 (72) Inventor Sato Ryotaro F-term (reference) 1-5-1, Taito, Taito-ku, Tokyo 4F100 AK01A AK42 AK51 AK68 AL01 AT00B BA02 CB03 EH20 EH202 EH46 EH462 GB08 JN01A YY00A 4F208 AA24 AD18 AH48 MA01 MB01 MB02 MG04 MG07 MG22 MH06 MK08 MK11 MK13 MW02 MW23 MW26

Claims (2)

[Claims] 1. A decorative sheet for vacuum forming, comprising mainly a colorless or colored transparent or translucent thermoplastic resin film having suitability for vacuum forming and having an internal haze value of 10% or less. . 2. A decorative material obtained by laminating the decorative sheet according to claim 1 on a surface of a three-dimensional three-dimensional substrate for decorative material by a vacuum forming method.