JP2000233422A - Preparation of decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve dimensional stability of a picture pattern by forming an uneven pattern on the surface of a transparent substrate sheet and the picture pattern of the underside with good registration accuracy. SOLUTION: This decorative sheet is prepd. by a method wherein a molten sheet 2 of a thermoplastic resin extruded from a T-die 11 and a thermoplastic resin solid sheet 1 are inserted between an embossing and cooling roller 12 and a pressing roller 13 and the molten sheet 2 is solidified by cooling on the roller 12 to integrally bond it with the solid sheet 1 and after the transparent substrate sheet 4 with an uneven pattern 3 on the molten sheet surface is peeled off from the roller 12, a printed ink layer 5 consisting of a picture pattern and a wholly solid color layer is formed on the opposite side face to the uneven pattern of the transparent substrate sheet 4 by means of a rotary press using a plate cylinder 21 to prepare a decorative sheet S. The transparent substrate sheet 4 may be formed by coating the surface of the formed uneven pattern side with a curable resin coating and curing it by crosslinking to form a rigid coating film before the printed ink layer 5 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a decorative sheet having a transparent substrate sheet having a concavo-convex pattern on the surface and a picture pattern on the back. This decorative sheet is used for various uses such as flooring (floor).

[0002]

2. Description of the Related Art Conventionally, a decorative sheet having a structure in which an irregular pattern is formed on the front side of a transparent resin sheet, and a printing ink layer composed of a pattern and a solid color solid is printed on the back side of the sheet, For example, it was manufactured as follows.

[0003] A picture pattern is printed on the front side of a colored base sheet made of a vinyl chloride resin, and a transparent resin sheet made of a vinyl chloride resin is laminated on the printed surface, and the front side of the transparent resin sheet is simultaneously printed. A method of manufacturing by so-called doubling embossing in which an uneven pattern is formed on a side surface (see Japanese Patent Application Laid-Open No. 54-62255). First, a pattern is printed on a colored base material sheet in advance, and then the transparent resin sheet melt-extruded from the T-die is brought into contact with an embossing / cooling roller, and the colored resin sheet on the roller is colored. Insert and press the base sheet so that its design faces the transparent resin sheet side,
While cooling and solidifying the transparent resin sheet in that state,
A method of forming a concavo-convex pattern on the surface of a transparent resin sheet while adhering to the substrate sheet (Japanese Patent Laid-Open No. 6-2108)
No. 08). After the molten transparent resin sheet is extruded from the T-die and brought into contact with the embossing / cooling roller, and cooled and solidified,
A method in which the roller is peeled off from the roller to form an uneven pattern on the surface, and thereafter, a pattern and a solid color solid are printed on the back surface of the sheet (see JP-A-9-24585).

[0004]

SUMMARY OF THE INVENTION
However, the method for producing a decorative sheet has the following problems.

In the method (A), since the thickness of the colored base sheet is added to the decorative sheet, the decorative sheet is attached to a wooden board or the like, particularly in winter, and then V-cut. Occasionally, the decorative sheet may be whitened. In addition, in order to laminate the colored base material sheet and the transparent resin sheet by hot pressing as completed solid sheets, respectively, heat, moisture,
The adhesion between the two sheets may be reduced by light or the like. (B) In addition, when a pattern or the like is formed on a long-strip base material sheet and then a concavo-convex pattern is formed by embossing with hot pressure, tension is applied to the heat-softened sheet in the embossing, and the material is released from stress. This causes a dimensional change such as a reduction in the width of the raw fabric. For this reason, there are problems that the register between the uneven pattern and the picture pattern is not matched, and that the dimensional stability is lacking.

In the method (1), since the molten transparent resin sheet is cooled and solidified on an emboss (cooling) roller, the shape and dimensions of the concavo-convex pattern of the emboss roller (shaping plate) are adjusted with high precision on the solidified transparent resin sheet. Therefore, the above-mentioned disadvantage (B) is improved. However, when the colored base sheet is dimensionally expanded and contracted due to a change in tension and the like, and the register between the uneven pattern and the pattern is once misaligned, both sheets are stacked and adhered on the embossing / cooling roller. In addition, it is necessary to correct the misregistration by changing the position in the axial direction or the axial direction, which is more difficult than the misregistration correction in the rotary printing. Further, the disadvantage of the above (A) remains unsolved.

The method (A) solves the above-mentioned disadvantage (A). In addition, the disadvantage (B) is better, but worse than the above method. In other words, the sheet peeled off from the embossing / cooling roller has a concave / convex pattern on the thin film due to the anchor effect, and the peeling is heavy. Because of the softening, the sheet is stretched at the time of peeling, causing some misregistration.

[0008] As described above, if the register accuracy between the concavo-convex pattern and the picture pattern is poor, the design property is degraded, and the dimensional stability of the picture pattern (actually, the entire picture pattern including the concavo-convex pattern) is poor. In some cases, inconveniences occur in floor materials and window frame applications.
For example, there is a floor material laminated with a decorative sheet instead of laminating a sliced veneer on MDF (medium density fiberboard) or plywood. In this case, the pattern of the decorative sheet is a pattern in which veneers are bonded side by side, and a grooving process is applied to make the joint portion between the adjacent veneers even more realistic. However, if the dimensional stability of the pattern on the decorative sheet is poor, the seam portion of the veneer on the pattern will be misaligned, and the actual groove position and the seam portion will not be aligned, resulting in unsightly flooring . Therefore, an object of the present invention is to provide a method of manufacturing a decorative sheet that can register a concavo-convex pattern on a front surface side with a picture pattern on a back face side and has good dimensional stability of the picture pattern.

[0009]

In order to solve the above-mentioned problems, a method for manufacturing a decorative sheet according to the present invention comprises the steps of: (a) forming a molten sheet of a transparent thermoplastic resin which is extruded from a T-die by heating and melting; A solid sheet of a thermoplastic resin, between the rotating embossing / cooling roller and the pressing roller having a desired concavo-convex pattern on the surface, in such a direction that the molten sheet is in contact with the concavo-convex pattern, and both sheets The molten sheet is inserted and cooled and solidified on the embossing and cooling roller so that the rotational peripheral speed of the embossing and cooling roller matches, and the concavo-convex pattern on the roller is formed on the cooled and solidified molten sheet. After shaping, the solid sheet and the cooled and solidified molten sheet are bonded and integrated to form a transparent base sheet having a concavo-convex pattern. Then, the transparent base sheet is peeled from the roller, and the transparent base sheet is removed. While traveling substrate sheet, its uneven pattern was set to form a printing ink layer comprising a picture pattern and whole-area solid colored layer by rotary printing on the opposite side. As a result, when the molten sheet is peeled off from the embossing / cooling roller to form a sheet with an uneven pattern formed on the surface, the dimensional stability is reduced because the solid sheet is peeled off as a transparent resin sheet in a laminated state. After that, it is possible to register the pattern and the concavo-convex pattern by rotary printing. And the dimensional stability of the picture pattern on the decorative sheet is also good. In addition, the adhesive strength between the cooled and solidified molten sheet and the solid sheet does not decrease over time when the decorative sheet is used because the molten sheet comes into contact with the solid sheet in a molten state and is laminated. In addition, since the colored base sheet can be omitted by the entire solid color layer to be printed and the thickness of the decorative sheet can be reduced by that amount, the sheet is not whitened at the time of sheet bending such as V-cut processing.

The method for producing a decorative sheet according to the present invention comprises:
In addition to the above method, after the transparent substrate sheet is peeled off from the embossing / cooling roller, and before the printing ink layer is formed on the transparent substrate sheet, the transparent substrate sheet has A curable resin coating was applied and crosslinked and cured to form a hard coating layer. By the hard coating layer, the transparent substrate sheet further increases the dimensional stability, and the register between the picture pattern and the uneven pattern can be more accurately matched. Of course, the dimensional stability of the picture pattern is also improved.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a method for manufacturing a decorative sheet according to the present invention will be described with reference to the drawings.

First, FIG. 1 is a conceptual diagram illustrating a method for manufacturing a decorative sheet according to the present invention, and FIG. 2 is a conceptual diagram illustrating a method for manufacturing a decorative sheet according to the present invention in a sectional view of the decorative sheet. FIG. 3 is a conceptual diagram illustrating, by way of example, a form in which a hard coating layer is also formed in the method for manufacturing a decorative sheet of the present invention, and FIG. 4 illustrates a manufacturing method in which a hard coating layer is also formed. It is a key map explained with a sectional view of a decorative sheet.

[Solid Sheet] The solid sheet 1 is not particularly limited as long as it is a solid sheet made of a transparent thermoplastic resin and has a long strip shape. The transparency may be any transparent as long as the pattern of the printing ink layer formed on the back side of the decorative sheet can be visually recognized. The term "transparent" may be a colorless transparent in addition to a non-colored one.

Examples of the thermoplastic resin include a polyolefin resin, a vinyl resin such as polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, and ethylene-vinyl alcohol copolymer, polyethylene terephthalate, polybutylene terephthalate, and polyethylene terephthalate. Polyester resin such as isophthalate copolymer, acrylic resin such as polymethyl methacrylate, polymethyl acrylate, polyethyl methacrylate, polystyrene, acrylonitrile-butadiene-styrene copolymer (ABS resin), cellulose triacetate, cellophane, It is a resin such as polycarbonate.

The above-mentioned polyolefin resin includes highly crystalline non-crystalline resins such as polyethylene (low density or high density), polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, propylene-butene copolymer and the like. Elastomer polyolefin resins or various olefin thermoplastic elastomers can be used. As the olefin-based thermoplastic elastomer, for example, the following can be used.

Japanese Patent Publication No. Hei 6-23278 discloses
(A) As a soft segment, the number average molecular weight Mn is 2
An atactic polypropylene soluble in boiling heptane having a weight average molecular weight Mw of not less than 5,000 and a ratio of weight average molecular weight Mw to number average molecular weight Mn of 7 to 10 to 90% by weight;
As a hard segment, the melt index is 0.1
Soft polypropylene consisting of a mixture of ４4 g / 10 min boiling heptane-insoluble isotactic polypropylene 90-10 wt%. Among olefin thermoplastic elastomers of this type, those that are less likely to cause so-called "necking" and have good suitability for molding or embossing by heating and pressing are isotactic polypropylene and atactic polypropylene. And the mixture ratio of the isotactic polypropylene and the atactic polypropylene is 5% by weight or more and 50% by weight or less by weight of the atactic polypropylene.

The polypropylene-based olefin-based thermoplastic elastomer itself is already known, but when used in a conventionally known application such as a packaging container, the weight of the atactic polypropylene serving as a soft segment is emphasized in order to emphasize strength. Those with a ratio of less than 5% by weight were exclusively used. However, when this is applied to a novel use such as forming into a three-dimensional shape or a concavo-convex shape or embossing, necking occurs as described above, and good processing cannot be performed. Therefore, contrary to the conventional composition design, the weight ratio of atactic polypropylene is set to 5% by weight or more in a polypropylene-based olefin-based thermoplastic elastomer. In addition, it is possible to eliminate defects such as non-uniform sheet deformation due to necking when forming an uneven article surface shape, and resulting wrinkles and picture distortions. In particular, the weight ratio of atactic polypropylene is 2
The case of 0% by weight or more is good. On the other hand, if the weight ratio of the atactic polypropylene increases too much, the sheet itself tends to deform, the sheet deforms when the sheet is passed through a printing machine, the pattern is distorted, or the register is lost in multicolor printing. And the like easily occur. Further, it is not preferable because it is easily broken during molding. As the upper limit of the weight ratio of the atactic polypropylene, the decorative layer and the like are printed using a normal rotary printing machine such as rotary gravure printing, and the sheet is embossed, vacuum formed, V-cut,
50% by weight when using injection molding simultaneous lamination
Or less, more preferably 40% by weight or less.

A thermoplastic elastomer comprising an ethylene-propylene-butene copolymer resin. Here, as the butene, 1-butene, 2-butene and isobutylene are used.
Any of the structural isomers can be used. The copolymer is a random copolymer and partially includes an amorphous portion. Preferred specific examples of the ethylene-propylene-butene copolymer include the following (i) to (iii). (i) Those described in JP-A-9-111055. It is a random copolymer of a terpolymer of ethylene, propylene and butene. The weight ratio of the monomer components is 90% by weight or more of propylene. The melt flow rate is preferably 1 to 50 g / 10 minutes at 230 ° C. and 2.16 kg. And, for 100 parts by weight of such a ternary random copolymer, 0.01 to 50 parts by weight of a transparent nucleating agent containing a phosphate aryl ester compound as a main component,
It is obtained by melting and kneading 0.003 to 0.3 parts by weight of a fatty acid amide having 12 to 22 carbon atoms. (ii) Those described in JP-A-5-77371. this is,
80 to 0% by weight of crystalline polypropylene is added to 20 to 100% by weight of an amorphous polymer having a propylene content of 50% by weight or more, which is a terpolymer of ethylene, propylene and 1-butene. It is. (iii) Those described in JP-A-7-316358. This is a terpolymer of ethylene, propylene, and 1-butene, and the content of propylene and / or 1-butene is 50% by weight or more. 0.5% by weight of an oil gelling agent such as an N-acylamino acid amine salt or an N-acylamino acid ester is added to a composition containing 80 to 0% by weight of a crystalline polyolefin such as isotactic polypropylene. It becomes.

The ethylene-propylene-butene copolymer resin may be used alone, or may be used in the above (i) to (iii).
If necessary, another polyolefin-based resin may be mixed and used.

As described in JP-B-53-21021, (A) an olefin polymer (crystalline polymer) such as polyethylene, polypropylene or polymethylpentene is used as a hard segment, and (B) a partially crosslinked ethylene- Propylene copolymer rubber, unsaturated ethylene-propylene-
An olefin-based elastomer obtained by using a monoolefin copolymer rubber such as a non-conjugated diene terpolymer rubber as a soft segment, and uniformly mixing and mixing these. Incidentally, monoolefin rubber / olefin polymer = 50/50 to 90
/ 10 (weight ratio).

As described in JP-B-53-34210 and the like, (B) uncrosslinked monoolefin copolymer rubber (soft segment) and (A) olefin copolymer (crystalline, hard segment) are crosslinked. An olefin-based elastomer obtained by mixing with an agent, heating and applying shear stress to dynamically partially cross-link. (B) Monoolefin rubber / (A)
Olefin copolymer = 60/40 to 80/20 (weight ratio).

As described in JP-B-56-15741, (A) mixing with a peroxide such as isotactic polypropylene, propylene-ethylene copolymer or propylene-butene-1 copolymer and heating reduces the molecular weight. Mixing and heating with a peroxide-decomposable olefin polymer (hard segment) that increases fluidity and (B) a peroxide such as ethylene-propylene copolymer rubber, ethylene-propylene-non-conjugated diene terpolymer rubber, etc. Mixes with peroxides such as peroxide-crosslinked monoolefin copolymer rubber (soft segment), which crosslinks and reduces fluidity, (C) polyisobutylene, butyl rubber, etc.
Peroxide non-crosslinked hydrocarbon rubber (soft segment and fluidity-modifying component) that does not crosslink even when heated and does not change fluidity, and (D) mineral oils such as paraffinic, naphthenic, and aromatic An olefin-based elastomer obtained by mixing a softener and dynamically heat-treating the mixture in the presence of an organic peroxide. (A) is 90 to 40 parts by weight, (B) is 10 to 60 parts by weight.
(A) + (B) = 100 parts by weight,
(C) and / or (D) have a compounding ratio of 5 to 100 parts by weight.

An olefin thermoplastic elastomer comprising an ethylene-styrene-butylene copolymer as described in JP-A-2-139232.

The above olefinic thermoplastic elastomer having a hydroxyl group and / or a carboxyl group as a polar group. For example, an olefin-based thermoplastic elastomer having a hydroxyl group introduced by graft polymerization of an ethylene-vinyl alcohol copolymer or the like and a carboxyl group introduced by a copolymer of maleic acid, fumaric acid, itaconic acid or the like is used. Either of these hydroxyl groups and carboxyl groups,
Alternatively, these polar groups may be used in combination, and these polar groups have an effect of improving the adhesiveness to other layers such as a printing ink layer such as a decorative layer and an adhesive layer.

The above-mentioned thermoplastic resin can be formed into a transparent solid sheet (film) by a film forming method such as a calender method, an inflation method, and a T-die extrusion method. The thickness of the sheet depends on the application and the like, but is usually about 10 to 100 μm. The sheet may be any of a stretched sheet and an unstretched sheet, but the unstretched sheet has better suitability for forming such as V-cut processing (bending workability).

Various additives are added to the solid sheet as needed. Examples of the additives include fillers such as inorganic powders such as calcium carbonate and clay, flame retardants such as magnesium hydroxide, antioxidants, foaming agents, lubricants, ultraviolet absorbers, and light stabilizers. When the solid sheet is to be colored and transparent, the sheet may be a sheet in which a known colorant, which is listed in a printing ink layer described later, is kneaded into a resin.

[Melted Sheet] The melted sheet 2 is not particularly limited as long as it is made of a transparent thermoplastic resin and extruded from a T-die and in a molten state by heating. The transparency may be any transparent as long as the pattern of the printing ink layer formed on the back side of the decorative sheet can be visually recognized. The term "transparent" may be a colorless transparent in addition to a non-colored one. As the above-mentioned thermoplastic resin, various thermoplastic resins listed as resins that can be used for the above-mentioned solid sheet can be used. Therefore, the listing here is omitted. The resin used for the molten sheet and the resin used for the solid sheet may be the same type of resin or different types of resins. The thickness of the molten sheet depends on the depth of the concavo-convex pattern to be formed, but is usually about 10 to 100 μm.

Also, the molten sheet is the same as the solid sheet.
Various additives are added as needed. Examples of the additives include fillers such as inorganic powders such as calcium carbonate and clay, flame retardants such as magnesium hydroxide, antioxidants, foaming agents, lubricants, ultraviolet absorbers, and light stabilizers. In particular, since the melted sheet is a sheet on the front side of the decorative sheet, in applications requiring improved weather (light) resistance, either one of an ultraviolet absorber such as a benzotriazole type and a light stabilizer such as a hindered amine type radical scavenger is used. Alternatively, both are preferably added as weathering agents to improve weather (light) resistance.
The amount of addition is usually in the range of 0.1 to 5% by weight. These weathering agents can of course also be used for solid sheets. In the case where the molten sheet is colored and transparent, a known colorant, which is listed in a printing ink layer described later, may be kneaded into the resin.

[Extrusion of Melted Sheet] In order to make the above-mentioned transparent thermoplastic resin into a molten sheet 2, the heated and melted resin may be extruded from a T-die 11 as shown in FIG.
Extrusion of the resin by the T-die may use a known extruder.

[Lamination of Both Sheets and Shaping of Concavo-convex Pattern] FIG.
In the present invention, when the molten sheet 2 is cooled and solidified by a cooling roller to form a film, the embossing / cooling roller 1 having a desired concavo-convex pattern on the roller surface is used as the cooling roller.
Using 2, the solidification by cooling and the embossing of the concavo-convex pattern are simultaneously performed. In addition, at this time, the solid sheet 1 is inserted together with the molten sheet 2 between the embossing / cooling roller 12 and the pressing roller 13. The molten sheet 2 is inserted in such a way that it contacts the concave and convex pattern of the embossing and cooling roller 12 so that the rotational peripheral speeds of both the sheets 1 and 2 and the embossing and cooling roller 12 match. Then, the molten sheet 2 is cooled and solidified on the embossing / cooling roller 12 to form the concavo-convex pattern on the roller 12 into the cooled and solidified molten sheet 2, and at the same time, the solid sheet 1 and the cooled and solidified molten sheet 2 After bonding and integrating to form a transparent substrate sheet 4 having a concave and convex pattern on the surface of the molten and solidified molten sheet, the transparent substrate sheet 4 is peeled off from the embossing / cooling roller 12 by a peeling roller 14 or the like. As a result, as shown in FIG. 2 (A), a transparent base sheet 4 in which an uneven pattern 3 is formed on the front side of the transparent base sheet 4 and a molten and solidified sheet 2 cooled and solidified is laminated on the solid sheet 1. 4 is obtained.

As described above, according to the present invention, when the molten sheet is separated from the embossing / cooling roller after being cooled and solidified, the molten sheet is supplied to the embossing / cooling roller instead of the transparent base sheet made of the cooled and solidified molten sheet alone. Since the transparent base sheet 4 in a state of being laminated with the solid sheet which is in a solid state is peeled from the transparent base sheet, the transparent base sheet is hardly stretched and the dimensional change can be suppressed. Therefore, the registration accuracy between the concavo-convex pattern and the picture pattern of the printing ink layer to be formed thereafter is also improved. And the dimensional stability of the picture pattern as a decorative sheet also becomes good.

(Embossing / Cooling Roller) The embossing / cooling roller 12 is a cylindrical rotating roller whose roller surface is an embossing / cooling surface. For example, a roller in which a copper layer is formed on a surface of a hollow cylindrical iron roller by plating and a desired uneven pattern is formed on the copper layer surface by a method such as a photoetching method or a mill engraving method can be used. The molten sheet is cooled by passing a cooling medium such as water into the hollow of the cylinder.

[Uneven pattern] The uneven pattern 3 is not particularly limited. What is necessary is just to shape what suits the use of a decorative sheet.
The uneven pattern is, for example, a grain surface, a satin surface, a hairline, a linear groove, a stone surface unevenness such as a cleavage plane of granite, a wood grain conduit groove, a wood grain annual ring unevenness, a floating annual ring unevenness, a wood grain unevenness, a cloth texture surface texture, a skin squeezing. , Characters, geometric patterns, etc. The linear grooves are described in, for example, Japanese Patent Publication No. Hei 7-22989, Japanese Patent Publication No. Hei 7-106625, and Japanese Patent Application Laid-Open No. 4-125199.
It is an aggregate of concave portions and convex portions formed by grooves of a parallel curve group or a straight line group, as disclosed in Japanese Patent Application Publication No. JP-A-2006-133139. The curve group is, for example, a line group such as a sine wave, a cycloid curve, an arc, and other curves. The depth of the concave portion and the width of the concave portion and the convex portion are, for example, about 0.1 to 100 μm. As will be described later in connection with the printing ink layer, a concavo-convex pattern which is in register with the picture pattern is also suitable in the present invention since it can be manufactured with high dimensional accuracy.

[Easy Adhesion Treatment Between Both Sheets] In order to improve the adhesion between the solid sheet and the molten sheet, it is preferable to appropriately perform an easy adhesion treatment as needed. FIG.
The example illustrated in (1) is also an example of the easy adhesion treatment to the molten sheet. That is, in the same figure, the surface of the molten sheet on the side that comes into contact with the solid sheet is subjected to the easy adhesion process until the molten sheet 2 is extruded from the T-die 11 and contacts the embossing / cooling roller 11. . As the easy adhesion treatment, for example, as shown in FIG. The ozone treatment device may be a known device.

Further, in order to improve the adhesion between the solid sheet and the molten sheet, an easy adhesion treatment may be performed on the solid sheet side. The easy adhesion treatment is, for example, corona discharge treatment, plasma treatment, or formation of an easy adhesion layer by coating or printing. The transparent base sheet 4 and the decorative sheet S illustrated in FIGS. 3 and 4 are examples in which the easy-adhesion layer 6 is formed. The easily adhesive layer is also called an anchor layer or the like. The adhesive layer may be appropriately selected from known anchor agents and the like according to the resin material of the two sheets. The easy-adhesion layer may be, for example, a layer made of a two-component curable urethane resin such as a thermosetting type, formed by a coating method or the like.

[Rotary Printing of Printing Ink Layer] As shown in FIG. 1, the printing ink layer 5 is formed on the back surface (the surface on the solid sheet side) of the transparent substrate sheet 4 by rotary printing. In the conceptual diagram of FIG. 1, the printing ink layer 5 is drawn in a simplified manner, but as the printing ink layer 5, as shown in FIG.
The pattern 5a and the entire solid color layer 5b are usually formed by printing in this order. The formation of the printing ink layer 5 on the transparent substrate sheet 4 may be performed continuously in-line or separately separately off-line, following the production of the transparent substrate sheet using an embossing / cooling roller. good. In the rotary printing, as shown in FIG. 1, a printing ink layer 5 is formed by printing through a transparent base material sheet 4 between a rotating cylindrical plate cylinder 21 and a cylindrical impression cylinder 22. The rotary printing may be performed by a known rotary printing machine, and the printing method may be a known printing method such as gravure printing or offset printing. The drawing is an example of gravure printing, in which ink 24 is supplied to the plate cylinder 21 from an ink pan 23, excess ink is scraped off by a doctor blade 25, and the ink on the plate cylinder is Is transferred to.

(Pattern Pattern, Solid Colored Layer) The pattern of the picture pattern and the color tone of the solid colored layer may be determined according to the intended use. For example, the pattern patterns include a wood pattern, a stone pattern, a grain pattern, a cloth pattern, a squeezed pattern, a geometric figure, a character, and a symbol. In particular, since the transparent substrate sheet can be produced with good dimensional stability in the production method of the present invention, the pattern can be formed by registering the pattern with the concavo-convex pattern. As a preferable combination of the picture pattern and the concavo-convex pattern, for example, when the concavo-convex pattern is a wood-grain conduit groove, a floating ring-shaped concavo-convex pattern, or a wood-bump pattern, the wood pattern is preferably a wood-grain pattern. Further, in the case where the uneven pattern is a grain pattern, the unevenness of a cleavage plane of granite, or the like, the picture pattern is preferably a stone pattern or a grain pattern. In addition, it is not always necessary to match each of the concavo-convex pattern and the picture pattern, that is, it is not necessary to match the positions of the respective patterns as the same pattern. The solid color layer on the entire surface is
When the color tone of the surface of the adherend is utilized when the decorative sheet is adhered to the adherend, transparent coloring is preferable. However, in the case of hiding without utilizing the color tone of the surface of the adherend, opaque coloring, that is, concealing coloring is preferable. In the method for producing a decorative sheet of the present invention, such a solid color layer on the entire surface is formed by a rotary printing method capable of simultaneously printing with a pattern, so that a base sheet (solid sheet) needs to be prepared as a colored sheet. There is no.

The ink used for the printing ink layer may be appropriately selected from known ones according to the use of the decorative sheet, the material of the printing medium, and the like. For example, binder resins used in ink vehicles include chlorinated polyethylene, chlorinated polyolefins such as chlorinated polypropylene, polyester, urethane resin, acrylic resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer, and cellulose resin. And the like, and one kind or a mixture of two or more kinds is used. Examples of coloring agents such as pigments and dyes include, for example, titanium white, zinc white, red iron oxide, vermilion, ultramarine, cobalt blue, titanium yellow, graphite, inorganic pigments such as carbon black, isoindolinone, Hansa Yellow A, Organic pigments (or dyes) such as quinacridone, permanent red 4R, phthalocyanine blue, indathrene blue RS, and aniline black; metal pigments such as aluminum and brass; titanium dioxide-coated mica; Pearl luster (pearl) pigment or the like is used.

[Easy Adhesion Treatment of Printed Surface] Transparent Base Sheet 4
In the case where the solid sheet 1 serving as the back side sheet is a polyolefin resin or the like, a chlorinated polyolefin, a urethane resin, or the like is preferable as a binder resin in terms of adhesiveness. Is also good. The easy adhesion treatment is, for example, corona discharge treatment, plasma treatment, or formation of an easy adhesion layer by coating or printing. The method illustrated in FIG. 1 is an example in which the corona discharge treatment is performed by a known corona discharge treatment device 16 and then the printing of the printing ink layer is performed. The easy-adhesion layer may be, for example, a layer made of a two-component curable urethane resin such as a thermosetting type, formed by a coating method or the like.

[Hard coating layer] Dimensional stability of transparent substrate sheet (and dimensional stability of pattern on decorative sheet)
In order to further improve the transparency, after the transparent substrate sheet is peeled off from the embossing / cooling roller and before forming the printing ink layer on the transparent substrate sheet, It is preferable that a hard curable resin paint is applied and cross-linked and hardened to form a hard coating layer (hard coat layer). As a result, it is possible to register the concavo-convex pattern and the picture pattern with higher accuracy. The coating may be performed by a conventionally known coating method such as roll coating or flow coating.

The resin of the curable resin paint is not particularly limited as long as it is basically a curable resin. However, in the case of a resin that requires heating for curing, the heat causes the transparent substrate sheet to easily elongate, which tends to impair dimensional stability. For this reason,
A resin that cures by means other than heat is preferred. For example, an ionizing radiation-curable resin that is cured by ionizing radiation such as ultraviolet light or an electron beam is preferable. The thickness of the hard coating layer may be usually about 2 to 25 μm. If it is too thin, the effect of stabilizing the dimensions cannot be obtained, and if it is too thick, the flexibility of the transparent base material sheet will decrease or the cost will increase. In addition, the hard coating layer, in addition to the purpose of dimensional stabilization, if necessary, may be appropriately adjusted for gloss, imparting design properties such as a feeling of painting, and improving the surface properties such as scratch resistance. .

The ionizing radiation-curable resin is a composition curable by ionizing radiation, and specifically, a prepolymer (so-called prepolymer) having a radically polymerizable unsaturated bond or a cationically polymerizable functional group in a molecule. Oligomers)
A composition which is curable by ionizing radiation and / or is appropriately mixed with a monomer is preferably used. These prepolymers or monomers are used alone or as a mixture of two or more.

The above prepolymer or monomer specifically has a radical polymerizable unsaturated group such as a (meth) acryloyl group and a (meth) acryloyloxy group, a cationic polymerizable functional group such as an epoxy group in the molecule. Consisting of a compound having Further, a polyene / thiol prepolymer based on a combination of polyene and polythiol is also preferably used. In addition, for example, a (meth) acryloyl group is
It means an acryloyl group or a methacryloyl group. Examples of the prepolymer having a radical polymerizable unsaturated group include polyester (meth) acrylate, urethane (meth) acrylate, epoxy (meth) acrylate, melamine (meth) acrylate, and triazine (meth) acrylate. The molecular weight is usually 250
Approximately 100,000 are used.

Examples of the monomer having a radical polymerizable unsaturated group include monofunctional monomers such as methyl (meth)
There are acrylate, 2-ethylhexyl (meth) acrylate, phenoxyethyl (meth) acrylate and the like.
Also, as polyfunctional monomers, diethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, trimethylpropane tri (meth)
There are also acrylate, trimethylolpropane ethylene oxide tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate and the like. Examples of prepolymers having a cationically polymerizable functional group include prepolymers of epoxy resins such as bisphenol epoxy resins and novolak epoxy compounds, and vinyl ether resins such as fatty acid vinyl ethers and aromatic vinyl ethers. Examples of the thiol include polythiols such as trimethylolpropane trithioglycolate and pentaerythritol tetrathioglycolate. Examples of the polyene include those obtained by adding allyl alcohol to both ends of a polyurethane made of a diol and a diisocyanate.

In the case of curing with ultraviolet light or visible light, a photopolymerization initiator is further added to the ionizing radiation-curable resin. In the case of a resin system having a radical polymerizable unsaturated group, acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ethers can be used alone or in combination as a photopolymerization initiator. In the case of a resin system having a cationically polymerizable functional group, an aromatic diazonium salt, an aromatic sulfonium salt, an aromatic iodonium salt, a metallocene compound, a benzoinsulfonic acid ester, or the like is used alone or as a mixture as a photopolymerization initiator. be able to. In addition,
The addition amount of these photopolymerization initiators is about 0.1 to 10 parts by weight based on 100 parts by weight of the ionizing radiation-curable resin.

As the ionizing radiation, electromagnetic waves or charged particles having energy capable of crosslinking the molecules in the hard coating layer are used. Usually, ultraviolet rays or electron beams are used, but it is also possible to use visible rays, X-rays, ion beams or the like. Ultraviolet light sources, ultra-high pressure mercury lamps, low pressure mercury lamps, carbon arc lamps,
A light source such as a black light or a metal halide lamp is used. The wavelength of the ultraviolet light is usually 190 to 380 nm.
Is mainly used. As the electron beam source, various electron beam accelerators such as a Cockcroft-Walton type, a Van degraft type, a resonance transformer type, an insulating core transformer type, a linear type, a dynamitron type, and a high frequency type are used.
To 1000 keV, preferably 100 to 300 keV
A device that irradiates an electron having an energy of?

Further, various additives can be further added to the ionizing radiation-curable resin, if necessary. These additives include, for example, vinyl chloride-vinyl acetate copolymers, polyvinyl acetates, acrylic resins, thermoplastic resins such as cellulose resins, and fine powders such as calcium carbonate, barium sulfate, silica, and alumina. Extender (filler) and the like.

In the case where a colored portion is formed in the concavo-convex pattern by wiping or the like to be described later, the hard coating layer may be formed thereafter. FIG. 4 shows an example of an embodiment in which the hard coating layer 8 is formed after the colored portion 7 is formed in the uneven pattern 3. That is, after the colored portion 7 is formed in the concave portion of the concave-convex pattern 3 of the transparent base sheet 4, the curable resin paint 8A is applied to the entire surface on the concave-convex pattern side (see FIG. 4A). The transparent base sheet 4 in FIG.
Is a form laminated on the solid sheet 1 via the easy adhesion layer 6. Next, the curable resin paint 8A is irradiated with ionizing radiation R such as an ultraviolet ray or an electron beam to crosslink and cure the curable resin paint 8A to form the hard coating layer 8 (see FIG. 4B).
Thereafter, the decorative sheet S is obtained by forming the printing ink layer 5 which is a pattern pattern 5a and the entire solid color layer 5b on the solid sheet 1 side of the transparent base sheet 4 [FIG.
(C)).

[Formation of Colored Part in Uneven Pattern] As illustrated in FIGS. 3 and 4, a colored part 7 may be formed in the uneven pattern 3 of the transparent base sheet 4 as necessary. . In order to form the colored portion 7 in the concave portion of the concavo-convex pattern 3, a known wiping method (Japanese Patent Publication No. 58-143) is conceptually shown in FIG.
No. 12, etc.), the colored ink 7A may be filled into the concave portion by the wiping device 31 to form the colored portion 7 (see also FIG. 2). The coloring ink can be the same as the printing ink layer ink described above. However, in terms of abrasion resistance, it is preferable to use a two-component curable urethane resin as a binder resin.

FIG. 3 shows an example in which a corona discharge treatment is performed by the corona discharge treatment device 16 on both the front and back surfaces of the transparent base sheet immediately before wiping as an easy adhesion treatment to the transparent base sheet.

[Adhesive Layer] The decorative sheet obtained as described above is further provided on its back side with an adhesive layer for adhering the decorative sheet to an adherend as necessary. May be provided. For the adhesive layer, a conventionally known adhesive such as a thermoplastic resin such as polyamide, a curable resin such as a thermosetting resin such as a urethane resin, or the like may be used depending on the application.

[Applied Body of Decorative Sheet] The use of the decorative sheet obtained in the present invention is not particularly limited, and the decorative sheet is laminated on the surface of various adherends and used for decorative purposes. The adherend is a plate material such as a flat plate or a curved plate of various materials, a three-dimensional article, a sheet (or film), or the like. For example, wood veneer,
Wood board material such as wood plywood, particle board, wood fiber board such as MDF (medium density fiber board), wood board material used as three-dimensional article, plate material such as iron and aluminum, metal used as three-dimensional article or sheet Materials, glass, ceramics such as ceramics, non-cement ceramic materials such as gypsum, non-ceramic ceramic materials such as ALC (lightweight cellular concrete) plates, ceramic materials used as three-dimensional articles, acrylic resin, Polyester resin, polystyrene resin, polyolefin resin such as polypropylene, ABS (acrylonitrile-butadiene-styrene copolymer) resin, phenol resin, vinyl chloride resin,
Cellulosic resin, plate materials such as rubber, resin materials used as three-dimensional articles or sheets, or high-quality paper used exclusively as sheets, paper such as Japanese paper, carbon, asbestos,
Nonwoven fabrics or woven fabrics made of fibers such as glass and synthetic resin can be used.

[Laminating method of decorative sheet on adherend] As a method of laminating the decorative sheet on these various adherends, for example, pressure is applied to a plate-like base material with a pressure roller via an adhesive. As described in Japanese Patent Publication No. 50-19132, Japanese Patent Publication No. 43-27488, etc., after the decorative sheet is placed between the male and female molds for injection molding, the molten resin is placed in the mold. A so-called simultaneous injection molding lamination method in which injection molding is performed and a decorative sheet is adhered and laminated on the surface of the resin molded article simultaneously with the molding thereof, as described in JP-B-56-45768 and JP-B-60-58014. , A decorative sheet is opposed to or placed on the surface of a three-dimensional article such as a molded article with an adhesive therebetween, and the decorative sheet is laminated on the surface of the three-dimensional article by a pressure difference due to vacuum suction from the three-dimensional article side. So-called vacuum Laminating method, as described in JP-B-61-5895, JP-B-3-2666, etc., an adhesive is provided between a decorative sheet and a columnar substrate such as a column or a polygonal column in the long axis direction. While feeding through
There is a so-called lapping method in which decorative sheets are successively pressed and laminated on a plurality of side surfaces constituting a columnar substrate by a plurality of rollers having different directions.

Further, as a further processing method for a product obtained by laminating decorative sheets to form a decorative plate, Japanese Utility Model 15-311
No. 22, JP-A-48-47972, a decorative sheet is first laminated on a plate-like base material with an adhesive therebetween to form a decorative sheet, and the surface opposite to the decorative sheet is used. To
Cut a V-shaped or U-shaped groove reaching the interface between the decorative sheet and the plate-shaped substrate, and then apply an adhesive in the groove and bend the groove to form a box or column. Is a so-called V-cut or U-cut processing method.

[Use of decorative sheet and laminate thereof] The decorative sheet obtained by the present invention is laminated on various adherends, and if necessary, subjected to a predetermined molding process and used for various purposes.
For example, interior decoration of buildings such as walls, ceilings, floors, window frames, doors, surface decoration of fittings such as handrails, surface decoration of furniture or cabinets of light electric / OA equipment, vehicle interiors such as automobiles, trains, aircraft, ships, Window glass makeup. In particular, the decorative sheet obtained by the production method of the present invention has good dimensional stability,
It is suitable for applications requiring dimensional stability such as floors and window frames.

[0056]

EXAMPLES The method for producing a decorative sheet according to the present invention will be further described below with reference to examples.

Example 1 A decorative sheet was manufactured using an apparatus as shown in FIG. First, as a solid sheet 1, a long strip-shaped, colorless and transparent polyolefin resin having a thickness of 80 μm (from a mixed resin based on a 90:10 weight ratio of isotactic polypropylene as a hard segment and atactic polypropylene as a soft segment). Of a polypropylene-based olefin-based thermoplastic elastomer) on the side to be brought into contact with the melted sheet, an anchor coating agent of a two-part curable urethane resin comprising acrylic polyol and hexamethylene diisocyanate at 7 g / m ² ( The coating was applied (on a solid basis) to form an easily adhesive layer (anchor layer) 6.

Next, the weight ratio of isotactic polypropylene to atactic polypropylene was 80:20.
A transparent polyolefin-based resin made of a polypropylene-based olefin-based thermoplastic elastomer is extruded from a T-die 11 as a melt while being dripped out of the T-die 11 to form a molten sheet 2. The molten sheet and the solid sheet are embossed and cooled by a roller 12. And the pressing roller 13 so that the molten sheet side is the embossing / cooling roller side. At this time, the surface on the side to be brought into contact with the solid sheet was ozone-treated by the ozone treatment device 15 immediately before the molten sheet was brought into contact with the embossing / cooling roller. Further, as the embossing / cooling roller, a roller having a concave and convex pattern in which the cooling surface of the roller forms a wood grain conduit groove was used.

Then, the molten sheet 2 is cooled and solidified by the embossing / cooling roller to form a sheet having a thickness of 80 μm, which is closely adhered to and laminated on the solid sheet 1 via the easy-adhesion layer 6, and the surface of the molten sheet is The transparent substrate sheet 4 having the configuration in which the concavo-convex pattern 3 was formed was peeled off from the embossing / cooling roller by the peeling roller 14 to produce the transparent substrate sheet 4.

Next, both the front and back surfaces of the transparent substrate sheet were subjected to corona discharge treatment by a corona discharge treatment device 16,
Planned surface of the transparent substrate sheet (the surface on the solid sheet side)
Then, a printing ink layer 5 composed of a three-colored wood pattern pattern and a solid color layer was formed by gravure rotary printing.
The printing ink used was a two-pack curable urethane resin in which the binder resin was composed of acrylic polyol and hexamethylene diisocyanate, and the coloring pigment was a red ink, titanium white, carbon black, and colored ink composed of graphite. .

Next, a two-part curable urethane resin composed of acrylic polyol and hexamethylene diisocyanate was used as a binder resin in the concave and convex pattern on the front and rear surfaces of the printed transparent substrate sheet, and a red stem and carbon black were used. A colored portion was formed by a wiping process using a coloring ink as a coloring pigment.

Next, a gravure coating of a two-part curable urethane resin composed of an acrylic polyol and hexamethylene diisocyanate is applied onto the entire surface of the front and back surfaces on which the irregular pattern is formed, and then an electron beam curable resin having the following composition is formed. After applying the resin paint to the entire front surface by roll coating,
Using a scanning type electron beam irradiation device, the coating material is cross-linked and cured by irradiating 5 Mrad with an electron beam of 175 keV.
A hard coating layer having a thickness of 10 μm was formed to obtain a decorative sheet.

Composition of electron beam curable resin paint Bifunctional bisphenol A epoxy acrylate prepolymer 20 parts by weight Bifunctional phenolic epoxy acrylate prepolymer 20 parts by weight Trimethylolpropane triacrylate 20 parts by weight Urethane acrylate (molecular weight 1700) [* 1] 20 parts by weight Silicone acrylate 0.8 parts by weight Spherical α-alumina particles (average particle size 25 μm) 15 parts by weight

* 1: The composition of the urethane acrylate is shown below. Polytetramethylene glycol (molecular weight 1000) 1000 parts by weight Isophorone diisocyanate 444 parts by weight 2-hydroxyethyl acrylate 232 parts by weight

The obtained decorative sheet has a good registration between the concavo-convex pattern and the pattern of the printing ink layer, and is a method for producing a decorative sheet having good dimensional stability.

Example 2 A decorative sheet was manufactured using the apparatus shown in FIG. First, as a solid sheet 1, a long strip-shaped, colorless and transparent biaxially stretched polyethylene terephthalate sheet having a thickness of 38 μm was coated on one side with an anchor coating agent of a urethane-based resin similar to that in Example 1 at 7 g / m ² (solid content basis).
The coating was applied to form an easily adhesive layer (anchor layer) 6.

Next, a melt of a polyolefin resin made of a polypropylene-based olefin-based thermoplastic elastomer similar to that in Example 1 was extruded from a T-die 11 while being dripped to form a molten sheet 2, and the molten sheet and the solid sheet were separated. In the same manner as in Example 1, the molten sheet was supplied between the embossing / cooling roller 12 and the pressing roller 13 so that the molten sheet side became the embossing / cooling roller side. As the embossing / cooling roller, a roller having a concave / convex pattern whose cooling surface forms a wood grain groove was used.

Then, the molten sheet 2 is cooled and solidified by the embossing / cooling roller to form a sheet having a thickness of 80 μm, which is in close contact with and laminated on the solid sheet 1 via the easy-adhesion layer 6. The transparent substrate sheet 4 having the configuration in which the concavo-convex pattern 3 was formed was peeled off from the embossing / cooling roller by the peeling roller 14 to produce the transparent substrate sheet 4.

Next, after performing corona discharge treatment on the surface of the transparent substrate sheet on which the embossed pattern is formed,
A colored portion was formed by wiping using a two-component curable urethane resin composed of an acrylic polyol and hexamethylene diisocyanate as a binder resin and a coloring ink mainly composed of carbon black as a coloring pigment.

Next, an electron beam-curable resin paint having the following composition is applied by a roll coating method on the entire surface of the front surface on which the concavo-convex pattern is formed, and then the electron beam of 175 keV is applied using a scanning type electron beam irradiation apparatus. Was irradiated with 5 Mrad to crosslink and cure the coating material to form a hard coating layer having a thickness of 10 μm.

Composition of electron beam curable resin paint Trifunctional polyester acrylate prepolymer 60 parts by weight Trimethylolpropane triacrylate 10 parts by weight 1,6-hexanediol diacrylate 29 parts by weight Silicone acrylate 1 part by weight

Next, after a corona discharge treatment was applied to the back surface of the solid sheet side, a printing ink layer 5 consisting of a three-color printing pattern of a wood grain pattern and an entire solid color layer was formed in the same manner as in Example 1.
Was formed by gravure rotary printing to obtain a decorative sheet. In the printing ink, the binder resin is composed of acrylic polyol and hexamethylene diisocyanate.
A mixed ink of a liquid-curable urethane resin and an acrylic resin, and a coloring ink in which a coloring pigment was made of red iron oxide, graphite, carbon black, titanium white, quinacridone red, and phthalocyanine blue.

The plate cylinder used in the rotary printing and the embossing / cooling roller are all formed from the same keyaki plate.
A photolithographic plate is made, and registration marks for cross-shaped recesses are provided on both sides of the roller surface of the embossing and cooling roller, and cross-shaped patterns are also provided on both sides of the plate cylinder. The dragonfly was prepressed. And when printing,
The reflected light of the light irradiated on both sides of the sheet is detected by the photoelectric tube,
Based on the embossed concavo-convex pattern, measure the positions of the design patterns of each color by printing on the embossed pattern, and use a rotary printing machine to minimize deviations in the sheet flow direction and width direction at all these positions. The positions of the correction roller and the plate cylinder in the width direction were controlled to register the concavo-convex pattern with the picture pattern.

In the obtained decorative sheet, the misregistration between the concavo-convex pattern and the picture pattern and between the color separations of the picture pattern could not be visually discriminated, and practically sufficient registration accuracy was obtained. It became a method of manufacturing a decorative sheet having good dimensional stability.

[0075]

According to the method for producing a decorative sheet of the present invention, when the molten sheet is peeled off from the embossing / cooling roller to form a sheet having an uneven pattern on the surface, the solid sheet is laminated. Since the transparent resin sheet is peeled as it is, dimensional stability can be ensured, and registration of the pattern pattern and the concavo-convex pattern by rotary printing thereafter can be performed. And the dimensional stability of the picture pattern on the decorative sheet is also good. In addition, the adhesive strength between the cooled and solidified molten sheet and the solid sheet does not decrease over time when the decorative sheet is used because the molten sheet comes into contact with the solid sheet in a molten state and is laminated. In addition, since the colored base sheet can be omitted by the entire solid color layer to be printed and the thickness of the decorative sheet can be reduced by that amount, the sheet is hardly whitened when the obtained decorative sheet is bent by V-cut processing or the like. Further, after the transparent substrate sheet is peeled off from the embossing / cooling roller and before the printing ink layer is formed on the transparent substrate sheet, a transparent curable resin coating is applied to the surface of the transparent substrate sheet on the side of the uneven pattern. If the method is such that a hard coating layer is formed by coating and cross-linking and hardening, the transparent base sheet further increases the dimensional stability by the hard coating layer, and the register between the pattern pattern and the uneven pattern is obtained. Can be adjusted with higher precision. Of course, the dimensional stability of the pattern as a decorative sheet is also good.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram illustrating a method for manufacturing a decorative sheet according to the present invention.

FIG. 2 is a conceptual diagram illustrating a method for manufacturing a decorative sheet according to the present invention with reference to a cross-sectional view of the decorative sheet.

FIG. 3 is a conceptual diagram illustrating an embodiment in which a hard coating layer is also formed by the method for producing a decorative sheet according to the present invention.

FIG. 4 is a conceptual diagram illustrating a form in which a hard coating layer is also formed by a cross-sectional view of a decorative sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Solid sheet 2 Fused sheet 3 Concavo-convex pattern 4 Transparent base material sheet 5 Printing ink layer 5a Picture pattern 5b Solid color layer 6 Easy adhesion layer 7 Colored part 8 Hard coating layer 11 T die 12 Embossing and cooling roller 13 Press roller Reference Signs List 14 peeling roller 15 ozone treatment device 16 corona discharge treatment device 21 plate cylinder 22 impression cylinder 23 ink pan 24 ink 25 doctor blade 31 wiping device S decorative sheet

Continued on the front page F-term (reference) 4F100 AK01A AK01B AK07A AK07B AL05A AL05B AL09A AL09B BA02 BA10A BA10B BA15 CC00A EC032 EH232 EH461 EH463 EJ051 EJ081 EJ502 GB08 HB00A HB00B HB21A JB01A03 J05B12A FB23 FG02 FG08 FJ09 FN11 FN15 FN17 FQ32 4F209 AA36 AB12 AD05 AD08 AF01 AG03 AH48 PA04 PB02 PC05 PG02 PG05 PG12 PJ09 PN04 PN06 PQ02

Claims (2)

[Claims] 1. A rotating embossing / cooling roller comprising a heat-melted transparent thermoplastic resin extruded from a T-die and a solid transparent thermoplastic resin solid sheet having a desired uneven pattern on its surface. Between the pressure roller
The molten sheet is inserted in such a direction as to be in contact with the concave and convex pattern, and in such a manner that the rotational peripheral speeds of both sheets and the embossing / cooling roller match, and the molten sheet is cooled on the embossing / cooling roller. Solidifying, shaping the concavo-convex pattern on the roller into the cooled and solidified molten sheet, and bonding and integrating the solid sheet and the cooled and solidified fused sheet to form a transparent base sheet having an uneven pattern; After that, the transparent base material sheet is peeled off from the roller, and while the transparent base material sheet is running, a printing ink comprising a pattern and a full-color solid layer on the surface opposite to the uneven pattern by rotary printing. A method for producing a decorative sheet, which forms a layer. 2. After the transparent substrate sheet is peeled off from the embossing / cooling roller, a transparent hardened sheet is formed on the surface of the transparent substrate sheet on the side of the concavo-convex pattern before forming a printing ink layer on the transparent substrate sheet. The method for producing a decorative sheet according to claim 1, wherein the resin sheet is applied and crosslinked and cured to form a hard coating layer.