JPH10258488A - Highly sharp decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve an environmental contamination problem by using a polyolefin film instead of vinyl chloride resin for causing the contamination due to generation of hydrogen chloride gas in the case of incineration. SOLUTION: The highly sharp decorative sheet 1 is formed by providing a design print layer 12 by printing on a colored polyolefin film 11, coating and drying a transparent polyester film 13 (haze of a range of 1 to 8%, and light ray permeability of wavelength of 400 to 700 nm of 70% or more) with adhesive to form an adhesive layer 14, and laminating the film 11 by a dry laminating method. In the case of laminating, the film 13 of the surface is preferably brought into contact with a mirror surface plate or mirror surface roll to a mirror surface state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet used for interior decoration of buildings, surface decoration of fittings, interior decoration of vehicles, etc., and more particularly, to a decorative sheet provided for the purpose of providing design and protecting the surface. It is about.

[0002]

2. Description of the Related Art Conventionally, as a decorative sheet in which a polyvinyl chloride layer, a polyethylene terephthalate layer and a hard coat layer are sequentially laminated, a decorative sheet having a feeling of painting, abrasion resistance and V-cut workability has been known (see, for example, Japanese Patent Application Laid-Open No. H11-157556). JP-B-8-22586).

[0003]

However, a decorative sheet using a polyvinyl chloride film has a problem that when it is discarded and incinerated, it generates hydrogen chloride gas and causes environmental pollution. Resins are said to be unfavorable for environmental protection. According to the present invention, by using a polyolefin film instead of a polyvinyl chloride film, a decorative sheet that does not generate hydrogen chloride gas even during incineration can be obtained, and the problem of environmental pollution during incineration has been solved. In addition, since the conventional decorative sheet did not provide sufficient clarity, the problem was solved by limiting the haze degree and visible light transmittance of the polyester film used on the surface to certain ranges. Was.

[0004]

Means for Solving the Problems To solve the above problems, the decorative sheet has the following structure. The polyolefin film, the pattern printing layer, and the haze degree are in the range of 1 to 8%, and the light transmittance is in the wavelength range of 400 nm to 700.
A high-definition decorative sheet was obtained by sequentially laminating a transparent polyester film of 70% or more in the range of nm. In addition, the polyolefin film is a high-definition decorative sheet which is a blend of polyethylene and rubbers. Further, the polyolefin film is a high-definition decorative sheet made of a soft polypropylene resin having a complex three-dimensional structure composed of a mixture of isotactic polypropylene and atactic polypropylene.

That is, in the decorative sheet of the present invention, a picture print layer is formed on a polyolefin film (or sheet), and the haze degree is in the range of 1 to 8% and the transmittance of visible light is reduced. 70% or more of polyester films are laminated, and the surface of the polyester film is mirror-finished. And as a polyolefin film,
A film made of a blend of polyethylene and rubbers,
Alternatively, a film of a soft polypropylene resin having a complex three-dimensional structure composed of a mixed system of isotactic polypropylene and atactic polypropylene is used.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing one example of the high definition decorative sheet of the present invention. FIG. 2 is a schematic sectional view showing another example of the high definition decorative sheet of the present invention. FIG. 3 is a schematic cross-sectional view of the decorative sheet manufactured according to Example 1.
FIG. 4 is a schematic cross-sectional view of a decorative sheet manufactured according to Example 2. FIG. 5 is an explanatory view when the high definition decorative sheet of the present invention is produced.

[0007] As shown in FIG. 1, the high-definition decorative sheet of the present invention basically comprises a printed sheet having a pattern printing layer 12 provided on a polyolefin film 11 and a haze degree of 1 to 8%. The decorative sheet 1 is formed by laminating a transparent polyester film having a visible light transmittance of 70% or more by heat fusion or the like. Also, as shown in FIG.
Polyolefin film 1 provided with the pattern printing layer 12
When the transparent polyester film 1 and the transparent polyester film 13 cannot be heat-sealed, the decorative sheet 1 is bonded by interposing an adhesive layer 14 therebetween. Further, the surface of the transparent polyester film 13 is brought into contact with the mirror surface plate during the heat lamination so as to be in a mirror surface state to enhance the sharpness of the decorative sheet.

Hereinafter, an example of a method for producing a highly vivid decorative sheet of the present invention will be described. First, as shown in FIG. 5A, a primer layer 15 is formed on the surface of a colored polyethylene film (hereinafter referred to as a colored PE film) 11a, and a pattern printing layer 12 is formed on the primer layer 15 by printing.
Is provided. Further, the primer layer 15 is also formed on the back surface of the colored PE film 11a. On the other hand, as shown in FIG. 5 (b), a transparent polyester film having a haze of 1 to 8% and a transmittance of light having a wavelength of 400 nm to 700 nm of 70% or more is a polyethylene terephthalate film (hereinafter referred to as a PET film). ) 13a, this P
An adhesive is applied to the back surface of the ET film to form an adhesive layer 14.

Next, as shown in FIG. 5C, the surface of the pattern printing layer 12 of the printed colored PE film 11a and the PET film 13a on which the adhesive layer 14 has been formed are attached by a dry lamination method. The laminated sheet 2 is manufactured. Further, as shown in FIG. 3, a colored PE film 11 having an adhesive layer 15 formed on the back surface of the laminated sheet 2
a are laminated by a dry lamination method to produce a high definition image decorative sheet 1.

As the polyolefin resin in the present invention, polyethylene (PE), polypropylene (PP),
Ethylene / propylene copolymer, ethylene / butene-1
Copolymer, propylene / butene-1 copolymer, polybutene-1, butene-1, propylene / ethylene three copolymer, butene-1, hexene-1, octene-1 copolymer, polymethylpentene, or 1683
An olefin-based elastomer described in JP-A No. 2 or the like is used. And the thickness of the film used is 50-
The thickness is in the range of 200 μm, preferably about 100 μm, and either a stretched film or an unstretched film can be used, but the unstretched film is better in terms of workability such as V-cutting.

The above-mentioned polyolefin resin can be used by itself, but it has flexibility and flexibility.
In order to impart impact resistance and easy adhesion, various rubbers are added and used as a blend of polyolefin and rubber. As the rubbers, diene rubbers, hydrogenated diene rubbers, olefin elastomers and the like are used, and among them, hydrogenated diene rubbers are preferred. Hydrogenated diene rubber is obtained by adding a hydrogen atom to at least a part of the double bond of the diene rubber molecule.In the present invention, the hydrogenated diene rubber is used as a modifier for a polyolefin resin. It works to suppress, improve flexibility and transparency. In general, when a diene rubber is added to a polyolefin resin, weather resistance and heat resistance are lower than those of a polyolefin resin to which a diene rubber is not added because of a double bond of the diene rubber. Is saturated with a hydrogen atom, so that a decrease in the weather resistance and heat resistance of the polyolefin resin is prevented and the polyolefin resin becomes favorable.

Examples of the diene rubber include isoprene rubber, butadiene rubber, butyl rubber, propylene / butadiene rubber, acrylonitrile / butadiene rubber, acrylonitrile / isoprene rubber, and styrene / butadiene rubber. For the purposes of the present invention, styrene-butadiene rubber is particularly preferred. As the amount of the diene rubber added,
A range of 1 to 90 parts by weight can be used with respect to 100 parts by weight of the polyolefin resin. If the addition amount is less than 1 part by weight, the elasticity, elongation, and impact resistance are insufficient, and V cut processing,
During bending, cracks and cracks are likely to occur. Also,
If the added amount is 90 parts by weight, the elasticity and elongation are too large,
Registration becomes difficult during printing, which is not preferable as a printing substrate.

As the polypropylene resin used in the present invention, it is preferable to use a soft polypropylene resin having a composite three-dimensional structure composed of a mixed system of isotactic polypropylene and atactic polypropylene.

In the present invention, when coloring a polyolefin film, a pigment,
It is colored by dispersing a coloring agent such as a dye. Further, a filler, a foaming agent, a flame retardant, an ultraviolet absorber, and the like may be added to the colored polyolefin resin. As the filler, silica, calcium carbonate, magnesium carbonate and the like can be used. Further, it is preferable to use a filler having an average particle size of 5 μm or less. This filler, pigment and / or
Alternatively, the colored polyolefin film can be made opaque with a dye.

The polyolefin film used in the present invention preferably has a Young's modulus in the range of 1 to 200 kgf / mm ² . If the Young's modulus exceeds 200 kgf / mm ² , cracks tend to occur during V-cut processing, which is not preferable. Also,
If the Young's modulus is less than 1 kgf / mm ² , poor registration will occur during printing.

The polyolefin film used in the present invention has a correlation between the heat shrinkage and the cracking / breaking property during bending in the V-cut processing, and the dimensional shrinkage of the film after heating in a 100 ° C. atmosphere for 30 minutes. In the case of a long strip film, the rate (based on before heating) is -2 to + 7% in the longitudinal direction of the film, and -7 to + 2% in the width direction of the film.
Is preferable. If the dimensional shrinkage ratio deviates from this range, cracks occur during V-cut processing, which is not preferable. It should be noted that the allowable range of the dimensional shrinkage ratio during heating differs between the longitudinal direction and the width direction of the film because the mechanical history at the time of film production, and how the impact force at the time of film processing is applied in the longitudinal direction and the width direction. Because they are different. The dimensional shrinkage due to this heating is
There is a great correlation mainly with the stretching of the polyolefin film. If the film is not stretched, the dimensional shrinkage ratio due to heating falls within the above range, and if the film is stretched three times or more, the dimensional shrinkage ratio due to heating almost falls outside the above range.
Therefore, in the case of stretching, it is necessary to suppress the stretching ratio so that the dimensional shrinkage ratio due to heating falls within the above range.

The polyester film resin used in the present invention includes polyester resins represented by polyethylene terephthalate, polybutylene terephthalate, ethylene terephthalate / isophthalate copolymer and the like. The polyester resin is an ester compound of an aromatic dicarboxylic acid such as terephthalic acid, isophthalic acid, and naphthalenedicarboxylic acid as an acid component, and an aliphatic diol such as ethylene glycol, diethylene glycol, butanediol, and hesandiol as an alcohol component. This is a copolymer obtained by the above method.

The transparent polyester film used in the present invention not only has the function of clearly lifting the pattern of the pattern printing layer but also the function of protecting the pattern printing layer. In order to realize high sharpness, the transparent polyester film has a haze within a range of 1 to 8%,
It is important that the content is preferably in the range of 3 to 6%. When the haze degree is 1% or less, even if there is a slight scratch on the printed surface, it is very conspicuous, and the design as a decorative sheet is deteriorated. On the other hand, when the haze degree is 8% or more, the internal pattern is scattered and appears, and the sharpness becomes insufficient.

The transparent polyester film must have a haze within the above range and a light transmittance of 70% or more in a wavelength range of 400 to 700 nm. If the light transmittance is 70% or less, the sharpness of the picture cannot be sufficiently obtained, and a high design effect cannot be obtained. Therefore,
In order to obtain the high-definition decorative sheet of the present invention, the transparent polyester film has a haze of 1 to 8%,
And a light transmittance of 70 in the wavelength range of 400 to 700 nm.
It is an important point to make the percentage or more.

In the present invention, the pattern printing layer may be provided on either the surface of the polyolefin film (the surface in contact with the polyester film) or the back surface of the polyester film, or may be provided on both films. However, the picture print layer needs to be provided between the polyolefin film and the polyester film. Examples of the method of forming the picture printing layer include gravure printing, intaglio printing, offset printing, letterpress printing, flexographic printing, silk screen printing, electrostatic printing, and inkjet printing.
Alternatively, a transfer pattern may be formed by forming a pattern once on a release sheet, and then forming a pattern printing layer by a transfer printing method from the obtained transfer sheet.

As the picture pattern, wood grain pattern, stone grain pattern,
There are a cloth pattern, a leather pattern, a geometric figure, a character, a symbol, various abstract patterns, or a solid printing on the entire surface.

As the ink for pattern printing, various inks can be used, and a composition comprising a binder, a colorant, an extender, a curing agent, an additive, a solvent and the like can be used. There is no particular limitation on the binder, but chlorinated polyolefins such as chlorinated polyethylene and chlorinated polypropylene, polyesters, polyurethanes, acrylics, vinyl acetate, vinyl chloride-vinyl acetate copolymers, cellulose-based resins, etc. A room temperature curable resin or a thermosetting resin such as a plastic resin or a polyurethane, or an ionizing radiation curable resin such as an acrylic resin can be used.

When printing directly on a polyolefin film, a chlorinated polyolefin, polyurethane or the like is preferable as a binder in terms of adhesiveness. However, if an easy-adhesion primer is appropriately selected and formed, other binders can be used. Even when used, sufficient adhesiveness can be obtained.

In order to improve the weather resistance (light resistance), an ultraviolet absorber and / or
Alternatively, a light stabilizer may be added. The addition amount of the ultraviolet absorber and the light stabilizer is usually 0.5 to 10% by weight.
In general, it is preferable to use an ultraviolet absorber and a light stabilizer in combination. Organic substances such as benzotriazole, benzophenone, and salicylate, or inorganic substances such as zinc oxide, cerium oxide, and titanium oxide having a particle size of 0.2 μm or less can be used as the ultraviolet absorber. As a stabilizer, bis- (2,2,6,6,
Hindered amine radical scavengers such as -tetramethyl-4-piperidinyl) sebacate and radical scavengers such as piperidine radical scavengers can be used.

The polyolefin film may contain a filler such as calcium carbonate, barium sulfate, clay, or talc, in addition to the above-mentioned external ray absorbent and light stabilizer. The amount added is appropriately determined according to the application.
Further, a powder such as aluminum hydroxide or magnesium hydroxide may be added to the polyolefin film as a flame retardant. The amount of polyolefin resin 10
The range of 10 to 150 parts by weight relative to 0 parts by weight is preferable.

When it is desired to use the polyolefin film as a cellular (sponge-like) foam, a foaming agent is added to the polyolefin resin, and the film is heated to generate a foam when heated to form a film having bubbles therein. . As the foaming agent, azodicarbonamide, azobisisobutyronitrile, N-N'-dinitrosopentamethylenetetramine, oxybisbenzenesulfonylhydrazine, sodium hydrogen carbonate, potassium hydrogen carbonate, etc., or A microcapsule type in which a thermally expandable gas such as hexane or isobutane is sealed in a resin spherical shell such as acrylonitrile is used. The amount of the foaming agent is usually 1 to 10 parts by weight based on 100 parts by weight of the polyolefin resin.

As a method of laminating a polyolefin film and a polyester film, a melt extrusion method (extrusion method), a heat fusion method by a hot press, or a dry method using an adhesive of a two-component curing type polyurethane resin or polyester resin. There is a lamination method and the like. As a heat fusion method by a hot press, at least the surface to be the surface of the polyester film is overlapped so as to be in contact with the mirror body, and the temperature is 120 ° C to 160 ° C and the pressure is 5 to 100 kg.
/ Cm ² , for 2 to 10 minutes, after heating and pressurizing,
A method of cooling to a room temperature in a pressurized state and taking out from a press machine is used. As the press, a general-purpose press such as a flat press, a roll press, and a belt press can be used.

In the present invention, an easy adhesion treatment may be performed on a polyolefin film, a polyester film, or a picture printing layer in order to improve the adhesion. Examples of the easy adhesion treatment include a corona discharge treatment, a plasma treatment, and a method of forming an easy adhesion layer (also referred to as a primer layer or an anchor layer). As a method of forming the easy-adhesion layer, a known method using an ink in which a resin such as an acrylic resin, a vinyl chloride-vinyl acetate copolymer, a polyester resin, a polyurethane resin, a chlorinated polyethylene, and a chlorinated polypropylene is dissolved in a solvent is used. And dried to form an easily adhesive layer.
It is possible to print a pattern or apply an adhesive directly to the polyolefin film itself.However, by providing an easy-adhesion layer, the adhesion between the pattern printing layer or the adhesive and the polyolefin film can be enhanced. Can be something.

Examples of the acrylic resin used for the easy-adhesion layer include poly (methyl) acrylate, poly (ethyl) acrylate, propyl poly (meth) acrylate, butyl poly (meth) acrylate, and (meth) acrylate. Methyl acrylate / (meth) butyl acrylate copolymer, ethyl (meth) acrylate / butyl (meth) acrylate copolymer, ethylene / methyl (meth) acrylate copolymer, styrene
An acrylic resin comprising a homo- or copolymer containing a (meth) acrylate such as a methyl (meth) acrylate copolymer is exemplified. (However, methyl (meth) acrylate means methyl acrylate or methyl methacrylate, and hereinafter (meth) has the same meaning.)

The polyurethane resin used for the easy-adhesion layer is a composition containing a polyol compound (polyhydric alcohol) as a main component and an isocyanate compound as a crosslinking agent (curing agent). The polyol compound has two or more hydroxyl groups in the molecule, and is basically a monomeric diol or triol, or a polymer diol or triol in which a chain compound composed of an alkylene unit is bonded thereto. Is included. A typical polymer polyol has a hydroxy group at the end, to which an alkylene unit is repeatedly bonded to form a linear or branched compound, preferably 2,3,4 in one molecule. Or a compound having a hydroxy group or more.

For example, ethylene glycol, propylene glycol, glycerin, trimethylolpropane,
1,2,6-hexanetriol, butenediol,
Sucrose, glucose, sorbitol, petaerythritol, mannitol, triethanolamine, n
-Methyldimethanolamine, and cyclic aromatic and aliphatic polyols. Further, polyethylene glycol, polypropylene glycol, acrylic polyol, polyester polyol, polyether polyol and the like are used.

As the isocyanate compound, a polyvalent isocyanate compound having two or more isocyanate groups in a molecule is used. For example, 2,4 tolylene diisocyanate, 2,6 tolylene diisocyanate, diphenylmethane-4-4'-diisocyanate, polyphenylmethane polyisocyanate called crude MDI, hexamethylene diisocyanate, dicyclohexylmethane-4-4'-diisocyanate , Aliphatic or alicyclic or aromatic di- or triisocyanate compounds such as triphenylmethane triisocyanate, hydrogenated tolylene diisocyanate, hydrogenated diphenylmethane diisocyanate, or polyisocyanate compound and low molecular weight glycol or triol, for example, dipropylene glycol -Terminal isocyanate-terminated low molecular weight adduct obtained by reacting with 1,6-hexanediol, 1,2,6-hexanetriol and trimethylolpropane There can be used.

The decorative sheet of the present invention can be laminated on another adherend (backing material). When the decorative sheet can be directly adhered to the adherend by heat fusion or the like, the adhesive may be omitted, but usually, the decorative sheet itself often does not adhere to the adherend, so that an appropriate adhesive It is laminated using an agent. When the adherend is a final product, the decorative sheet is used for surface decoration of the adherend, and the back of the decorative sheet is backed to reinforce the mechanical strength of the decorative sheet or to provide concealment. An adherend may be laminated as a material.

The object to be adhered is a plate material such as a flat plate or a curved plate of various materials, a three-dimensionally shaped article (molded article), or an article of various shapes such as a sheet (or film). As a material used for any of a plate material, a three-dimensionally shaped object, and a sheet (or a film), a wood material such as a plate material alone, a wood plywood, a particle board, a medium density fiber board (MDF), a wood fiber board such as a wood fiber board, Metals such as iron and aluminum, acryl, polyester, polycarbonate, ethylene-vinyl acetate copolymer, ethylene vinyl acetate, polyester, polystyrene, polyolefin, ABS, phenol resin, polyvinyl chloride, cellulose resin, rubber and the like. In addition, as a material exclusively used as a plate material or a three-dimensional object, glass, ceramics, etc.,
There are non-cement ceramic materials such as calcium silicate and gypsum, and the materials used as sheets or films include paper such as high-quality paper and Japanese paper, carbon, asbestos, potassium titanate, glass, synthetic resin and other fibers. A nonwoven fabric or a woven fabric.

As a method for laminating these various adherends, for example, a method of laminating a plate-like substrate by pressing with a pressure roller via an adhesive, Japanese Patent Publication No. 50-1913
No. 2, JP-B-43-27488, etc., the decorative sheet is inserted into a male mold or a female mold of an injection molding machine, clamped, and the gate of the male mold is closed. Inject molten resin from inside, fill the cavity with resin, and at the same time as injection molding, adhere the decorative sheet to the surface of the molded product,
So-called simultaneous lamination method for injection molding, Japanese Patent Publication No. 56-45
No. 768, Japanese Patent Publication No. 60-58014, etc., a decorative sheet is opposed to or placed on the surface of a molded product via an adhesive, and the pressure is applied by vacuum suction from the molded product side. As described in the so-called vacuum press laminating method, Japanese Patent Publication No. 61-5895, Japanese Patent Publication No. Hei 3-2666, etc., a columnar base material such as a cylinder, a polygonal column, etc. In the long axis direction, while supplying a decorative sheet via an adhesive, a plurality of rollers having different directions are sequentially pressure-bonded and laminated on a plurality of side surfaces constituting a columnar body, so-called, Lapping method, Japanese Utility Model Publication No. 15-31122, JP-A-48-4
As described in Japanese Patent No. 7972, etc., first, a decorative sheet is laminated on a plate-like base material via an adhesive, and then a V-shaped cross section is formed on a surface of the plate-like base material opposite to the decorative sheet. Or U-shaped groove is cut, the depth of the groove is adjusted to reach the interface between the decorative sheet and the plate-shaped substrate, and after applying an adhesive in the groove, the groove is bent. There is a so-called V-cut or U-cut processing method for producing a box or column.

In particular, as a method of attaching the decorative sheet of the present invention to a three-dimensional object having irregularities, among the above-mentioned methods,
(A) lapping method, (b) V-cut method,
(C) Simultaneous injection molding laminating method, (d) Simultaneous vacuum molding laminating method and the like are preferable.

The decorative sheet of the present invention is used for various applications by laminating on various adherends and subjecting it to a predetermined molding process. For example, the interior of buildings such as walls, ceilings, floors, window frames,
It is used for surface decoration of buildings such as doors and handrails, surface decoration of furniture or cabinets of light electric / OA equipment, interior of vehicles such as automobiles and trains, interior of aircraft, makeup of window glass, and the like.

[0038]

The present invention will be described below in more detail with reference to examples. (Example 1) As shown in FIG.
Colored PE film 11 having a thickness of 150 μm at gf / mm ²
a (Tatsuno Chemical Co., Ltd. "F-21") and a two-part curable urethane primer solution (Showa Ink Industries Co., Ltd. "AFS
Medium ") to form a primer layer 15, and then a gravure ink (" AFS "manufactured by Showa Ink Industries, Ltd.)
To form the pattern printing layer 12. As shown in FIG. 5A, the colored PE film 12
Similarly to the above, a primer layer 15 was formed on the back surface.

On the other hand, as shown in FIG.
An adhesive (“E-295” manufactured by Dainichi Seika Kogyo Co., Ltd.) is applied to a transparent PET film 13 a having a haze of 3% and a transmittance of visible light of 80% at 0 μm, dried, and dried.
Was formed. Next, as shown in FIG. 5 (c), the colored PE film 11a provided with the picture printing layer 12 and the transparent PET film 13a provided with the adhesive layer 14 were laminated by a dry lamination method to form a laminated sheet 2 Was prepared. Further, as shown in FIG. 3, a 300 μm-thick colored PE film 11a was laminated on the surface of the primer layer 15 of the colored PE film 11a of the laminated sheet by a dry lamination method using the same adhesive as described above. Thus, a decorative sheet 1 was prepared. The obtained decorative sheet was high-definition and excellent in design.

Example 2 Colored PE in FIG. 5A
Instead of film 11a, Young's modulus is 45kgf / mm
^A primer layer 15 and a picture printing layer 12 were formed in the same manner as in Example 1 using a colored soft PP film ("F-2900" manufactured by Idemitsu Petrochemical Co., Ltd.) having a thickness of 150 [mu] m.
Next, as shown in FIG. 4, the colored soft PP film 11b provided with the pattern printing layer 12 and the same transparent PE as in Example 1 were used.
The T film 13a was laminated in the same manner as in Example 1, and further,
The colored soft PP film 11b of the laminated sheet is laminated on the surface of the colored soft PP film 11b via the adhesive layer 14 in the same manner as in Example 1, and a high definition cosmetic using the colored soft PP film as the polyolefin film. Sheet 1 was produced. The obtained decorative sheet was high-definition and excellent in design.

[0041]

As described above, according to the present invention,
The structure of the decorative sheet is a structure in which a polyolefin film, a pattern printing layer, and a transparent polyester film are sequentially laminated, and by using a polyolefin film instead of polyvinyl chloride, even when incinerated, hydrogen chloride gas is generated. Since it does not occur, the problem of environmental pollution at the time of incineration can be solved. In addition, although sufficient clarity was not obtained with the conventional decorative sheet, a transparent polyester film used for the surface was prepared with a haze degree of 1 to 8%,
And 70% light transmittance at a wavelength of 400 nm to 700 nm.
By limiting to the above, a decorative sheet with high definition and high designability can be obtained. Further, as a polyolefin film, by using a blend of polyethylene and rubber, or a soft polypropylene-based resin composed of a mixture of isotactic polypropylene and atactic polypropylene, the decorative sheet is adhered to the adherend, and then adhered. Even when the body is subjected to V-cut processing or the like, a decorative sheet with good workability can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing one example of a high-definition decorative sheet of the present invention.

FIG. 2 is a schematic cross-sectional view showing another example of the high-definition decorative sheet of the present invention.

FIG. 3 is a schematic sectional view of a decorative sheet produced according to Example 1.

FIG. 4 is a schematic sectional view of a decorative sheet produced according to Example 2.

FIG. 5 is an explanatory view for producing a high-definition decorative sheet of the present invention, in which (a) a colored PE film provided with a primer layer and a pattern printing layer. (B) It is the figure which formed the adhesive layer on the transparent PET film. (C) It is the figure which laminated | stacked the transparent PET film via the adhesive layer on the pattern printing layer of the figure (a).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-definition decorative sheet 2 Laminated sheet 11 Polyolefin film 11a Colored PE film 11b Colored soft PP film 12 Picture printing layer 13 Transparent polyester film 13a Transparent PET film 14 Adhesive layer 15 Primer layer

Claims (3)

[Claims] 1. A polyolefin film, a picture printing layer,
And a high-definition decorative sheet comprising a transparent polyester film having a haze in the range of 1 to 8% and a light transmittance of 70% or more in the wavelength range of 400 to 700 nm. . 2. The high-definition decorative sheet according to claim 1, wherein the polyolefin film is a blend of polyethylene and rubbers. 3. The high-definition decorative sheet according to claim 1, wherein the polyolefin film is made of a soft polypropylene resin having a complex three-dimensional structure composed of a mixture of isotactic polypropylene and atactic polypropylene.