JPH08174783A - Manufacture of decoration sheet - Google Patents

Abstract

PURPOSE: To provide a decoration sheet having an excellent sharpness, printing property, processability, and ink coloring property even in the case of employing a thermoplastic resin such as a vinylchloride resin with low heat resistance. CONSTITUTION: The decoration sheet 1 is made up of laminating a PVC film 5 on the surface of an adhesive layer 4 side of a PET film with the adhesive layer 4 and print pattern layer 3 laminated consecutively. A hard coat layer 2 such as an ultraviolet ray curable resin is applied and then cured on the easy adhesive surface of the PET film 1, then the PET film 1 is given a print pattern layer 3. Since the film 1 has a high heat resistance compared to the film 5, a heat treatment can be done for sufficiently eliminating a component of the solvent in the print pattern layer 3. Next, an adhesive layer 4 for adhering the films 1, 5 is applied thereon, however, no occurrence of expansion and sagging of the PET film is found by application of an adhesive and so on, and a heat-drying treatment of the adhesive layer 4 can be conducted under the condition capable of adequately removing a component of the solvent n the adhesive layer, and further even in the instance of putting the films 1, 5 into a lamination process, no turbidity and blister of the decoration sheet occur by the solvent and so on.

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 as a surface material for furniture, home electric appliances, various cabinets and the like, and more particularly to a decorative sheet excellent in image clarity and texture.

[0002]

2. Description of the Related Art Conventionally, what is called a synthetic resin decorative board is widely used as a decorative board used as a surface material for furniture or the like, in which a decorative sheet which is a surface material is laminated on a substrate such as MDF, particle board or plywood. As the decorative sheet, a base sheet made of cloth, thin paper, vinyl chloride sheet or the like provided with a print pattern layer is generally used (for example, Japanese Utility Model Publication No. 15-31122, Kosho 5
6-7866, etc.). Further, a decorative sheet in which a thermosetting resin-impregnated paper having a printed pattern layer and a latex-impregnated paper are laminated via an adhesive layer is also used (for example,
Japanese Utility Model Publication No. 3-40602, Japanese Patent Publication No. 56-23791
No.

Further, in JP-A-6-71814, a polyester resin film having excellent transparency is laminated on the surface layer of a vinyl chloride resin film having a colored or printed pattern layer on the surface, and ultraviolet rays are applied to the polyester resin layer side. A decorative sheet having a hard coat layer made of a curable paint layer is disclosed.

[0004]

Among the various decorative sheets described above, the decorative sheet disclosed in Japanese Patent Laid-Open No. 6-71814 is a decorative sheet excellent in transparency, texture and coated feeling. Since this decorative sheet has excellent scratch resistance, specularity, and sharpness on the surface, it is used for outer boxes of cabinets, furniture, home appliances, and the like.

However, there is still room for improvement in the above decorative sheet as described below. That is, the decorative sheet, after applying a print pattern layer using a printing ink on a vinyl chloride resin film, the solvent in the print pattern layer is removed by heating, further, an adhesive is applied, the adhesive layer in the adhesive layer After the solvent component is also removed by heating and drying, a transparent polyester resin film is laminated.

However, when the printed pattern layer or the adhesive layer is applied to the vinyl chloride resin film, the vinyl chloride resin film sags or stretches when heated to remove the solvent therein. A problem occurs. Further, since the vinyl chloride resin film does not have heat resistance, the heating temperature at the time of removing the solvent in the printed pattern layer or the solvent in the adhesive layer cannot be made too high. Therefore, the solvent component remains in the decorative sheet, and the decorative sheet becomes turbid due to the residual solvent,
It cannot be denied that there is a possibility of blistering due to air bubbles. When the decorative sheet becomes cloudy or swelled, not only the image clarity of the decorative sheet is adversely affected, but also delamination easily occurs.

Also, in the case of a decorative sheet obtained by laminating a vinyl chloride resin film and a transparent polyester resin film via an adhesive layer using a vinyl chloride resin film without a printed pattern layer, the adhesive layer The influence of the solvent in it cannot be neglected as in the case described above.

Therefore, an object of the present invention is to provide a decorative sheet having excellent image clarity, printability, processability, and ink colorability even when a thermoplastic resin having weak heat resistance such as vinyl chloride resin is used. Is. Further, the object of the present invention is to use a thermoplastic resin such as a vinyl chloride resin, the film does not have elongation and sagging, and has excellent image clarity and printing without generation of bubbles or turbidity even when heat-treated. It is to provide a decorative sheet having suitability and the like.

[0009]

The above object of the present invention is achieved by the following constitutions. That is, a decorative sheet in which a printed pattern layer and an adhesive layer are sequentially laminated on the back surface of the second thermoplastic resin layer, and a first thermoplastic resin layer is laminated on the surface of the adhesive layer, or the first decorative sheet (2) A decorative sheet in which a hard coat layer is laminated on the surface of a thermoplastic resin layer.

The present invention also provides a decorative sheet in which an adhesive layer is laminated on the back surface of the second thermoplastic resin layer, and the first thermoplastic resin layer is laminated on the surface of the adhesive layer, or a decorative sheet of the above decorative sheet. (2) A decorative sheet in which a hard coat layer is laminated on the surface of a thermoplastic resin layer.

The above object of the present invention can be achieved by the following constitution. That is, after applying a hard coat layer to the easily adhesive surface of the second thermoplastic resin layer and curing it, a printed pattern layer is applied to the surface opposite to the surface coated with the hard coat layer of the second thermoplastic resin. A heating condition such that the solvent component in the printed pattern layer is sufficiently removed, an adhesive layer is then applied to the surface of the printed pattern layer, and the solvent component in the adhesive layer is sufficiently removed. After the heat treatment in, a method for producing a decorative sheet in which a first thermoplastic resin layer is laminated on the adhesive layer surface, or a hard coat layer is applied and cured on the easily adhesive surface of the second thermoplastic resin layer. After that, an adhesive layer was applied to the surface of the second thermoplastic resin layer opposite to the surface coated with the hard coat layer, and heat treatment was performed under heating conditions such that the solvent component in the adhesive layer was sufficiently removed. After that, the first thermoplastic resin layer is laminated on the surface of the adhesive layer. And a method of manufacturing a decorative sheet.

The first thermoplastic resin of the present invention absorbs the thickness of the printing layer laminated on the second thermoplastic resin layer side to eliminate irregularities and is essential for obtaining good bending workability. is there. As the plastic used for the layer of the first thermoplastic resin, any resin can be used as long as it has the above-mentioned action, and among them, polyvinyl chloride is particularly representative. In addition, acrylic resin, ABS resin, styrene resin, vinyl chloride / vinyl acetate copolymer resin can also be used. A suitable thickness of this layer is in the range of 10 to 500 μm. When the thickness is less than 10 μm, the function of absorbing the thickness of the printing layer provided on the second thermoplastic resin layer to eliminate the unevenness is insufficient, and the bending workability when used as a decorative plate is not good. On the other hand, if the thickness is more than 500 μm, the workability is deteriorated, which is not preferable. However, when there is little bending work, the designability can be improved by setting the thickness to 500 μm or more.

The first thermoplastic resin layer can be made into two layers which are transparent and colored. In particular, when manufacturing a decorative sheet that expresses the luster of wood grain, a sine wave, a Bessel function, and
It is advisable to form a linear groove having a depth and a frontage width of 0.1 to 100 μm in the form of a curve obtained by translating a wavy curve such as an elliptic function. In particular, it is particularly preferable to make the overall running direction of the wood grain and the overall running direction of the lines almost orthogonal. Here, “substantially orthogonal” means that the two traveling directions should intersect so that the luster of the wood grain can be sufficiently expressed. Alternatively, a polyvinyl chloride film may be colored or a pearl pigment may be kneaded and embossed. In addition, an ink in which a thermoplastic resin and a colorant as a binder are dispersed may be applied to the entire surface to form the first thermoplastic resin layer.

The transparent second thermoplastic resin layer forming the surface layer has a function of making the printing of the printed pattern layer stand out clearly and a function of protecting the printed pattern layer. In order to realize high image clarity, it is important that the haze of the thermoplastic resin used in this layer is in the range of 1 to 8%, more preferably 3 to 6%. If the haze degree is too small, it will be too vivid and even a slight scratch on the printed surface will be very noticeable. On the other hand, when the haze degree is larger than the predetermined value, the internal print appears to be scattered and the image clarity is not sufficient.

Here, the haze degree indicates the ratio of diffused light to the transmitted light, and indicates the degree of haze when an object is seen through the sample. The higher the haze degree is. You can see it. Total light transmittance is Tt,
Assuming that the diffuse transmittance is Td, the haze degree (cloudiness) H is calculated by H = (Td / Tt) × 100 (%). In addition to defining the haze degree in a predetermined range, the light transmittance is 70% or more (400 to 700 n
m) is important. When the light transmittance is less than 70%, high image clarity cannot be obtained, while the upper limit is not particularly limited.

The plastic film used for the transparent second thermoplastic resin layer is not particularly limited as long as it has a haze degree, light transmittance and heat resistance within a predetermined range. A biaxially stretched polyethylene terephthalate film having high dimensional stability is suitable. In addition, polyethylene naphthalate, polyarylate, cellulose triacetate, acrylic resin, and polycarbonate can also be used. The thickness of the second thermoplastic resin layer is appropriately in the range of 5 to 200 μm. If the thickness of the second thermoplastic resin layer is less than 5 μm, the thickness is less than 5 μm, and the printed pattern layer has a poor sense of depth, and the image clarity is insufficient. On the other hand, if it is thicker than 200 μm, bending is difficult. However, it is also disadvantageous in terms of cost. In order to improve printability and facilitate lamination with layers, the surface film may be subjected to a corona treatment or an easy adhesion treatment. Further, transparent pigments, dyes and the like may be added within a range that does not deviate the haze degree and the light transmittance from the above ranges.

A printed pattern layer may be provided between the above-mentioned first thermoplastic resin layer and the transparent second thermoplastic resin layer. As the ink used for forming the printed pattern layer, a vehicle is appropriately mixed with a colorant such as a pigment or a dye, an extender pigment, a solvent, a stabilizer, a plasticizer, a catalyst, a curing agent, etc., if necessary. Here, the vehicle is appropriately selected from a thermoplastic resin, a thermosetting resin, an ionizing radiation curable resin, and the like according to the application, required physical properties, printability, and the like.

Examples of the thermoplastic resin include cellulose derivatives such as ethyl cellulose, cellulose nitrate, cellulose acetate, ethyl hydroxyethyl cellulose and cellulose acetate propionate, polyolefins such as polyethylene, polypropylene and polymethylpentene, polyethylene terephthalate and polyethylene terephthalate copolymerization. Polyester resin such as polymer, polybutylene terephthalate, polyacrylate, polyvinyl chloride, polyvinyl acetate, polyvinyl chloride / polyvinyl acetate copolymer,
Polyvinyl butyral, polyvinyl alcohol, vinyl resins such as polyvinylidene chloride, polystyrene, poly α-
Styrene resins or styrene copolymers such as methyl styrene, acrylic styrene, ABS, polymethyl methacrylate, polyethyl methacrylate, polyethyl acrylate,
Acrylic resin such as polybutyl acrylate, polycarbonate, polyamide such as nylon 6, nylon 66, rosin, rosin-modified maleic acid resin, rosin-modified phenolic resin, rosin ester resin such as polymerized rosin, coumarone resin, vinyltoluene resin, etc. Resins may be mentioned.

As the thermosetting resin, phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, melamine / urea co-condensation resin. There are resins, silicone resins, polysiloxane resins, etc., and if necessary, a crosslinking agent,
A curing agent such as a polymerization initiator, a polymerization accelerator, a solvent, a viscosity modifier, and an extender pigment are added. As the curing agent, isocyanate is usually unsaturated polyester resin, polyurethane resin, amine is epoxy resin, peroxide such as methyl ethyl ketone tonoxide, radical initiator such as azobisisobutyronitrile is unsaturated polyester resin. Often used in. As the ionizing radiation curable resin, a composition in which a prepolymer having a polymerizable unsaturated bond or an epoxy group in the molecule, an oligomer and / or a monomer are appropriately mixed is used. For example, as the examples of the prepolymers and oligomers, unsaturated polyesters such as condensation products of unsaturated dicarboxylic acids and polyhydric alcohols, polyester methacrylates, polyether methacrylates, polyol methacrylates, methacrylates such as melamine methacrylate, polyester acrylates, epoxies. There are acrylates such as acrylate, urethane acrylate, polyether acrylate, polyol acrylate, and melamine acrylate.

Examples of the monomer include styrene and α-
Styrene-based monomers such as methylstyrene, methyl acrylate, 2-ethylhexyl acrylate, methoxyethyl acrylate, butoxyethyl acrylate, butyl acrylate, methoxybutyl acrylate, acrylic acid esters such as phenyl acrylate, Methacrylic acid esters such as methyl methacrylate, ethyl methacrylate, propyl methacrylate, methoxyethyl methacrylate, ethoxymethyl methacrylate, phenyl methacrylate and lauryl methacrylate, 2- (N, N-diethylamino) ethyl acrylate, 2- (N, N-diethylamino) ethyl methacrylate, 2- (N, N-dibenzylamino) ethyl acrylate, -2- (N, N-dimethylamino) methyl methacrylate, -2- (N, N-diethylamino) pro Substituted amino alcohol esters of unsaturated acids such as Le, acrylamide, unsaturated carboxylic acid amides such as methacrylamide, ethylene glycol diacrylate, propylene glycol diacrylate, neopentyl glycol diacrylate, 1,
Compounds such as 6-hexanediol diacrylate, diethylene glycol diacrylate and triethylene glycol diacrylate, polyfunctional compounds such as dipropylene glycol diacrylate, ethylene glycol acrylate, propylene glycol dimethacrylate and diethylene glycol dimethacrylate, and / or in the molecule A polythiol compound having two or more thiol groups,
For example, there are trimethylolpropane trithioglycolate, trimethylolpropane trithiopropylate, pentaerythritol tetrathioglycol and the like.

The above compounds may be used alone or in combination as necessary.
The prepolymer or oligomer is used in an amount of 5% by weight or more and the monomer and / or polythiol is used in an amount of 95% by weight or less, in order to impart ordinary coating suitability to the resin composition. It is preferable. When selecting a monomer, if flexibility of the cured product is required, use a monofunctional or bifunctional acrylate monomer by reducing the amount of the monomer within a range that does not hinder coating suitability. The structure has a relatively low crosslinking density. Also, when heat resistance, hardness, solvent resistance, etc. of the cured product are required, increase the amount of the monomer within a range that does not hinder the coating suitability, or use a trifunctional or higher functional acrylate monomer. It is preferable to use a structure having a high crosslinking density. The suitability for coating and the physical properties of the cured product can be adjusted by mixing a mono- or di-functional monomer and a tri- or higher functional monomer.

Examples of the monofunctional acrylate type monomer as described above include 2-hydroxy acrylate, 2-hexyl acrylate and phenoxyethyl acrylate. As the bifunctional acrylate-based monomer, ethylene glycol acrylate, 1,6-hexanediol diacrylate, etc., and as the trifunctional or higher-functional acrylate-based monomer, trimethylolpropane triacrylate,
Examples thereof include pentaerythritol hexaacrylate and dipentaerythritol hexaacrylate.

This printed pattern layer is usually formed by printing on the surface of the second thermoplastic resin layer, but it may be formed by a method other than that. The pattern can be printed on the surface film by using a known method such as a gravure method or a screen method using the above-described ink. Here, the printing of the design includes printing of the ink and addition of the design using vapor deposition of metal. For the formation of a pattern using a metal vapor deposition film, for example, a water-soluble ink layer having a desired pattern is provided on a surface film, a metal is vapor-deposited on the surface, followed by washing with water to form the water-soluble ink layer and the vapor deposition layer thereon. It can be carried out by removing it, and such a method is also included in the printing of the picture pattern in the present invention.

As described above, the adhesive layer side surface of the transparent second thermoplastic resin layer in which only the adhesive layer and the printed pattern layer or the adhesive layer are applied to sufficiently remove the solvent component in each layer And by laminating the first thermoplastic resin layer, processability,
It is possible to obtain a decorative sheet that satisfies both ink color development and high image clarity.

As the ink pigment, carbon black,
Known coloring pigments such as cyanine blue, pearl pigments such as titanium dioxide-coated mica, etc. are used.As the pattern and pattern, natural products such as wood grain and stone pattern, abstract patterns such as polka dots and striped patterns, full solid or these The combination of is arbitrary.

The print pattern layer may be omitted if a picture or pattern is not required. Further, instead of the printed pattern layer, a metal thin film layer of aluminum, chromium or the like, which is provided on the entire surface or a partial pattern, may be provided. An intervening layer should not be provided between the printed pattern layer and the second thermoplastic resin layer, but an intervening layer can be provided as long as it does not impair the coloring property and high image clarity of the printing ink. .

Between the metal plate and the first thermoplastic resin layer and / or between the first thermoplastic resin layer and the printed pattern layer, if necessary, a first adhesive layer and / or Alternatively, a second adhesive layer can be provided. By providing such an adhesive layer, the adhesion between the layers becomes more reliable.

There are various kinds of adhesives that can be used here, but it is preferable to use a solvent type thermosetting resin from the viewpoints of workability, processing suitability for coating and the like and cost. As the thermosetting resin, a phenol resin, a furan resin, a urea resin, a melamine resin, a polyester resin, a polyurethane resin, an epoxy resin, or another thermosetting resin is used, and if necessary. , A cross-linking agent such as isocyanate or amine, a polymerization initiator such as methyl ethyl ketone peroxide, hydroperoxide, azobisisobutyronitrile, a polymerization accelerator such as cobalt naphthenate or dimethylaniline can be used. . In addition, polyvinyl chloride, polyvinyl acetate, polyvinyl chloride / polyvinyl acetate copolymer, ethylene / vinyl acetate copolymer, polyvinyl butyral, polyvinyl alcohol, polyvinyl resin such as polyvinylidene chloride, polyolefin such as polyethylene and polypropylene. Resin, polyacrylic acid ester-based resin, poly (meth) acrylic acid ester resin, nitric acid fibrin, acetic acid fibrin, polyamide, ionomer or other thermoplastic resin, butadiene-acrylonitrile rubber, neoprene rubber, natural rubber, or other Rubber, or glue, casein, dextrin, starch, gum arabic, rosin, etc. as a main component one or a mixture of two or more natural resins and the like, if necessary, known fillers, pigments, dyes, Stabilizer, solvent, plasticizer, etc. added It can be used to as an adhesive.

The amount of adhesive applied is 1 to 20 dry.
g / m ² is good. More preferably 3 to 15 dryg / m ^2.
When it is less than 3 dryg / m ^2, it is difficult to obtain a sufficient adhesive force, and when it exceeds 15 dryg / m ² , the residual solvent tends to remain and the adhesive strength is weakened.

As a curing method for these adhesives, an appropriate method such as a solvent drying type, an emulsion type, a heat melting and solidifying type, or a thermosetting type can be selected.

The lamination of the second thermoplastic resin and the first thermoplastic resin, and the lamination of the obtained decorative sheet and the substrate may be performed according to known methods. For example, there are a heat fusion method, a dry laminating method, a wet laminating method and a hot melt laminating method using the above-mentioned various adhesives such as urethane type, phenol type and vinyl type.

Further, various known hard coat layers may be provided on the surface of the transparent second thermoplastic resin of the decorative sheet of the present invention within a range not deviating from the above ranges of haze and light transmittance. For example, a hard coat layer such as electron beam or ultraviolet ray curable polyester acrylate or urethane acrylate is used.

The hard coat layer is, for example, a coating film obtained by coating a one-component type or two-component curing type resin, preferably an ultraviolet curing type resin, and further irradiating it with ultraviolet rays to cure it. The UV-curable resin coating composition contains a monomer having a polyfunctional group of 82 to 88.
Parts, a monomer having a monofunctional group of 12 to 18 parts, an oligomer of 1 to 20 parts, a photoinitiator of 5 to 10 parts, a silicone-based additive of 0.1 part, and a solvent of 100 to 200 parts are exemplified. It A polyfunctional acrylate can be used as the monomer having a polyfunctional group. The number of functional groups of the polyfunctional acrylate is preferably in the range of 1 to 6, more preferably trifunctional or tetrafunctional acrylate is used. If the number of functional groups is 2 or less, the crosslink density is low,
It is difficult to obtain the required surface hardness, and if it is 5 or more, cracks are likely to occur when V-cutting or the like is performed in the post-processing.

The thickness of the hard coat layer coating film is 1 to 2
The range is preferably 0 μm, more preferably 2 to 10 μm.
Is. If the thickness is 2 μm or less, so-called interference fringes are generated, and if it exceeds 10 μm, roll heat wrinkles are likely to occur during coating, and stable production becomes difficult.

Specific examples of the monomer having a polyfunctional group include pentaerythritol, triacrylate, pentaerythritol, and tetraacrylate as main components.
A sensitizer containing vinylpyrrolidone is used as an additive for improving the adhesion to the second thermoplastic resin layer such as benzophenone or polyester resin.

The hardness of the hard coat layer is preferably H-4H in terms of pencil hardness. If the pencil hardness is less than H, the hardness will be poor, and if it is 5H or more, it will break during bending. This hard coat layer must be smoothly applied and cured by a gravure method or the like so as to have a mirror-like finish. This hard coat layer needs to have a thickness of at least 3 μm or more. The protective film is laminated as necessary, and prevents it from being inadvertently scratched or soiled during storage, transportation or other processing. As the protective film, for example, a film obtained by applying an acrylic pressure-sensitive adhesive to a polyolefin base film is used, which is releasably laminated on a hard coat.

The substrate to which the decorative sheet of the present invention is to be adhered includes wood veneer such as wood veneer (projection board), wood plywood, particle board, and MDF (medium density fiber board), gypsum board, inorganic material such as calcium silicate board. A plate, a resin plate such as acrylic resin, polyvinyl chloride, or a phenol resin is used.

[0038]

In the decorative sheet of the present invention having the above structure,
A hard coat layer such as an ultraviolet curable resin is applied and cured on the easily adhesive surface of the second thermoplastic resin. Next, a printed pattern layer is applied to the untreated surface of the second thermoplastic resin layer (the surface opposite to the surface coated with the hard coat layer). Since the second thermoplastic resin layer is a resin having relatively good heat resistance, unlike the first thermoplastic resin layer, it is possible to perform heat treatment sufficient to remove the solvent component in the printed pattern layer.

Not only when the printed pattern layer is applied, but also when the printed pattern layer is not applied, the adhesive layer for adhering the first thermoplastic resin and the second thermoplastic resin is then treated with the second heat. Although applied on the surface of the plastic resin layer, the heat-drying treatment of this adhesive layer can also be carried out under heating conditions that can sufficiently remove the solvent component in the adhesive layer. In this way, the surface of the adhesive layer from which the solvent component has been sufficiently removed is bonded to the first thermoplastic resin layer, and the first thermoplastic resin layer and the second thermoplastic resin layer are laminated.

[0040]

The following examples serve to explain the present invention more specifically. The invention is not limited in scope by these examples. Example 1 FIG. 1 shows a cross section of a decorative sheet of this example. As the second thermoplastic resin film, one side has an easy adhesion treatment thickness of 50μ
m, using a biaxially stretched polyethylene terephthalate (PET) film "T-600E" (manufactured by Diafoil Hoechst) 1 having a haze degree of 5% by a Daravia coat method,
A UV-curable coating composition (“T-9” manufactured by Dainichiseika Co., Ltd.) having the following composition is applied by UV irradiation so that the thickness after curing becomes about 4 μm, and then UV-irradiated to cure the composition. The curable resin layer 2 was obtained.

UV curable resin composition (1) Monomer: pentaerythritol triacrylate, pentaerythritol tetraacrylate, (2) Sensitizer: benzophenone, 1-hydroxycyclohexyl phenyl ketone (“Inga Cure 184”) (3) Additive : Vinylpyrrolidone, DOP (4) Solvent: xylene Then, using a pattern ink "ALFA" (manufactured by Inktech Ink Co., Ltd.) having the following composition on the surface of the PET film 1 opposite to the surface for easy adhesion treatment. The pattern printing layer 3 was provided.

(1) Resin: Urethane resin, vinyl chloride /
Vinyl acetate copolymer resin, alkyd resin, etc. (2) Pigments: monoazo, quinacridone, carbon black, disazo yellow, cyanine blue. (3) Solvent: Toluene, MEK, IPA, etc. (4) Additive: Silica (5) Curing agent: Hexamethylene diisocyanate In order to sufficiently remove the solvent component in the gravure pattern layer 3, the temperature is kept at 80 ° C. for 10 seconds. Heat treatment was performed.

Then, an adhesive "E-295" having the following composition was formed on the surface of the printed pattern layer 3 using a reverse roll coater.
Adhesive layer 4 was formed by applying (manufactured by Dainichiseika Co., Ltd.) so that the thickness when dried was 10 g / m ² . (1) Resin: Polyester polyol (2) Curing agent: Hexamethylene diisotoanate (3) Solvent: Ethyl acetate, MEK, etc. Further, in order to sufficiently remove the solvent component in the adhesive layer 4, 100 ° C., 1 After heat treatment for 1 minute, colored polyvinyl chloride “GR-017” with a thickness of 150 μm is applied on top of it.
Film 5 (manufactured by Mitsubishi Kasei Vinyl Co., Ltd.) was laminated by a roll laminating method.

The decorative sheet thus obtained was treated with a solvent-based adhesive "HBF-83" (manufactured by Nippon Fuller Co., Ltd.).
A 20 mm-thick MDF was attached to obtain a decorative plate. The decorative sheet of the obtained decorative plate swells inside, peels off,
It was excellent in image clarity without bleeding, and was excellent in texture and scratch resistance.

Example 2 FIG. 2 shows a cross section of a decorative sheet of this example. In this example, the lamination of the printed pattern layer 3 in the procedure for producing the decorative sheet of Example 1 was omitted. The decorative sheet of the obtained decorative plate had excellent image clarity without swelling, peeling, and bleeding inside, as in Example 1, and also had excellent texture and scratch resistance. .

Example 3 In this example, the PET film 1 of Example 1 was replaced by a polyethylene naphthalate film, and Example 1 was used.
A decorative sheet and a decorative plate were manufactured in the same procedure as described above. The decorative sheet of the obtained decorative plate had excellent image clarity without swelling, peeling, and bleeding inside, as in Example 1, and also had excellent texture and scratch resistance. .

Example 4 In this example, a decorative sheet and a decorative sheet were produced in the same procedure as in Example 1 except that a polycarbonate film was used instead of the PET film 1 of Example 1. The decorative sheet of the obtained decorative plate had excellent image clarity without swelling, peeling, or bleeding inside, as in Example 1.
It was also excellent in texture and scratch resistance.

[0048]

As described above, the decorative sheet of the present invention has excellent image clarity without swelling, peeling or bleeding inside the sheet, and also has excellent texture and scratch resistance. To be

[Brief description of drawings]

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

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

[Explanation of symbols]

 1 PET film, 2 UV curable resin layer 3 Printing pattern layer 4 Adhesive layer 5 Polyvinyl chloride

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Claims (9)

[Claims] 1. A decorative sheet in which a printed pattern layer and an adhesive layer are sequentially laminated on the back surface of a second thermoplastic resin layer, and the first thermoplastic resin layer is laminated on the surface of the adhesive layer. 2. A decorative sheet in which a hard coat layer is laminated on the surface of the second thermoplastic resin layer of the decorative sheet according to claim 1. 3. A decorative sheet in which an adhesive layer is laminated on the back surface of a second thermoplastic resin layer, and a first thermoplastic resin layer is laminated on the surface of the adhesive layer. 4. A decorative sheet in which a hard coat layer is laminated on the surface of the second thermoplastic resin layer of the decorative sheet according to claim 3. 5. The decorative sheet according to claim 1, wherein the first thermoplastic resin is a polyvinyl chloride resin and the second thermoplastic resin is a polyester resin. 6. The first thermoplastic resin is a polyvinyl chloride resin, and the second thermoplastic resin is a polyester resin,
The decorative sheet according to claim 2 or 4, wherein the hard coat layer is an ultraviolet curable resin. 7. A printed pattern is formed on the surface opposite to the surface coated with the hard coat layer of the second thermoplastic resin after the hard coat layer is coated on the easily adhesive surface of the second thermoplastic resin layer and cured. A layer is applied and heat treatment is performed to sufficiently remove the solvent component in the printed pattern layer, and then an adhesive layer is applied to the surface of the printed pattern layer so that the solvent component in the adhesive layer can be sufficiently removed. The method for producing a decorative sheet, comprising laminating a first thermoplastic resin layer on the surface of the adhesive layer after heat treatment under various heating conditions. 8. A hard coat layer is applied to the easily adhesive surface of the second thermoplastic resin layer and cured, and then adhered to the surface of the second thermoplastic resin layer opposite to the surface coated with the hard coat layer. A decorative sheet characterized in that an adhesive layer is applied and heat treatment is carried out under a heating condition capable of sufficiently removing a solvent component in the adhesive layer, and then a first thermoplastic resin layer is laminated on the adhesive layer surface. Manufacturing method. 9. The first thermoplastic resin is a polyvinyl chloride resin, the second thermoplastic resin is a polyester resin,
The method for manufacturing a decorative sheet according to claim 7, wherein the hard coat layer is an ultraviolet curable resin.