Manufacturing method for front and back matching gloss matte decorative sheet

Abstract

To provide a front / back-synchronized gloss mat decorative sheet capable of suppressing a deviation of registration due to an elongation of a raw fabric layer.SOLUTION: A front / back-synchronized gloss mat decorative sheet includes: a transparent thermoplastic resin layer 6; a mat layer 7 and a gloss negative pattern layer 8 sequentially laminated on one side of the transparent thermoplastic resin layer 6; and a pattern layer 5 disposed on the other side thereof. The gloss negative pattern layer 8, the transparent thermoplastic resin layer 6 and the pattern layer 5 are synchronized. The transparent thermoplastic resin layer 6 is composed of a layer with a thickness of 0.060 to 0.100 mm, a degree of elongation of 100% to 200% both in a longer direction and in a width direction, at a tension test in accordance with JIS K 7161. As the thickness and the degree of elongation of the transparent thermoplastic resin layer 6 are specified, an elongation of the transparent thermoplastic resin layer 6 caused by an effect of a tension fluctuation when printing the pattern layer 5 is suppressed, so that a deviation of registration of the pattern layer 5, the transparent thermoplastic resin layer 6 and the gloss negative pattern layer 8 can be suppressed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention provides a matte gloss decorative sheet with matching front and back surfaces. Manufacturing method Regarding. [Background technology]

[0002] Conventionally, decorative sheets with wood grain patterns or abstract patterns have been used as decorative sheets in nursing homes for the elderly, senior residences, etc. As such decorative sheets, decorative sheets with matching front and back surfaces and designs that resemble real wood have been proposed (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-199313 [Patent Document 2] Japanese Patent Application Laid-Open No. 2016-101663 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-mentioned conventional decorative sheets have a problem in that when synchronizing the front and back sides, the stretching of the raw fabric layer makes it extremely difficult to achieve registration. The present invention has been made to solve such problems, and provides a front and back synchronized gloss matte decorative sheet that can suppress misregistration due to stretching of the raw fabric layer. Manufacturing method The purpose is to provide. [Means for solving the problem]

[0005] According to one aspect of the present invention, there is provided a front-to-back synchronized gloss matte decorative sheet comprising a transparent thermoplastic resin layer, a matte layer and a glossy negative pattern layer laminated in this order on one side of the transparent thermoplastic resin layer, and a pattern layer provided on the other side of the transparent thermoplastic resin layer, wherein the glossy negative pattern layer, the transparent thermoplastic resin layer, and the pattern layer are synchronized, and the transparent thermoplastic resin layer has a thickness of 0.060 mm or more and 0.100 mm or less, and an elongation rate in both the longitudinal direction and the transverse direction in a tensile test based on JIS K 7161 is 100% or more and 200% or less. The elongation during a tensile test referred to here is the elongation of a test object when the transparent thermoplastic resin layer serving as the test object is pulled at a speed of 200 mm / min and breaks, and is a value expressed by the following formula (1), where L is the length of the test object when it breaks and L0 is the length of the test object before the test. Elongation rate (%) = 100 × (L-L0) / L0 ……(1) [Effects of the Invention]

[0006] According to the present invention, misregistration due to elongation of the raw fabric layer can be suppressed, and a front and back-matched gloss matte decorative sheet with excellent design can be produced. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a cross-sectional view schematically illustrating an example of a front and back matching gloss matte decorative sheet according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The drawings are schematic, and the relationship between thickness and planar dimensions, the ratio of each thickness, etc., differ from the actual ones. Furthermore, the embodiments shown below are merely examples of configurations for embodying the technical idea of ​​the present invention, and the technical idea of ​​the present invention is not limited to the materials, shapes, etc. of the components described below. The technical idea of ​​the present invention can be modified in various ways within the technical scope defined by the claims.

[0009] <Configuration> 1 is a cross-sectional view showing an example of a front-back synchronized matte gloss decorative sheet 1 according to the present invention, which comprises a transparent thermoplastic resin layer 6, a matte layer 7 and a glossy negative pattern layer 8 laminated in this order on one side of the transparent thermoplastic resin layer 6, and a pattern layer 5 provided on the other side of the transparent thermoplastic resin layer 6. The glossy negative pattern layer 8, the transparent thermoplastic resin layer 6, and the pattern layer 5 are synchronized. The transparent thermoplastic resin layer 6 has a thickness of 0.060 mm or more and 0.100 mm or less, and has an elongation of 100% or more and 200% or less in both the longitudinal and transverse directions in a tensile test based on JIS K 7161.

[0010] Furthermore, a colored resin layer 3 is provided on the surface of the design layer 5 opposite to the transparent thermoplastic resin layer 6 via an adhesive layer 4 . Furthermore, a primer layer 2 is provided on the surface of the colored resin layer 3 opposite to the adhesive layer 4. The transparent thermoplastic resin layer 6 is preferably made of any one of polyolefin resin, polybutylene terephthalate resin, polyester resin, and polyvinyl chloride resin.

[0011] In Figure 1, the primer layer 2 is applied as needed to improve adhesion with the adhesive used to bond the front and back matching gloss matte decorative sheet 1 of the present invention to a substrate (not shown). Adhesives such as vinyl acetate emulsions and two-component curing urethane adhesives are commonly used for adhesives for wood substrates, which are the most common substrates, so it is desirable to design the primer layer 2 from a resin that is compatible with these general-purpose adhesives.

[0012] Specific examples of the primer layer 2 include urethane-based, acrylic-based, ethylene-vinyl acetate copolymer, vinyl chloride-vinyl acetate copolymer-based, and polyester-based primers, and among these, two-component curing urethane-based primers that combine polyester polyol and an isocyanate compound are effective. The addition of inorganic powders such as silica, barium sulfate, and calcium carbonate is effective in preventing blocking during storage in a roll and improving adhesive strength through an anchoring effect.

[0013] The colored resin layer 3 is made of a thermoplastic resin, and examples thereof include polyolefin resins such as polyethylene, polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, ethylene-α-olefin copolymer, and propylene-α-olefin copolymer; polyolefin-based resins such as olefin-based copolymer resins such as ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-(meth)acrylic acid (ester) copolymer, and ethylene-unsaturated carboxylic acid copolymer metal neutralized product (ionomer); polyethylene terephthalate, polybutylene terephthalate resin, polytetramethylene terephthalate, polyethylene naphthalate, polyethylene terephthalate-isophthalate copolymer, 1,4-cyclohexanedimethanol copolymerized polyethylene terephthalate, and polyaris. Examples of the resin that can be used include polyester resins such as acrylate and polycarbonate, acrylic resins such as poly(meth)acrylonitrile, polymethyl(meth)acrylate, polyethyl(meth)acrylate, polybutyl(meth)acrylate, and polyacrylamide, polyamide resins such as 6-nylon, 6,6-nylon, and 6,10-nylon, styrene resins such as polystyrene, AS resin, and ABS resin, vinyl resins such as polyvinyl chloride resin, polyvinyl acetate, polyvinyl alcohol, polyvinyl acetal, and polyvinyl butyral, and fluorine-based resins such as polyvinyl fluoride, polyvinylidene fluoride, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer, and ethylene-perfluoroalkyl vinyl ether copolymer, as well as mixtures, copolymers, composites, and laminates of two or more of these resins.

[0014] Among the various thermoplastic resins mentioned above, in view of the recent growing social interest in environmental issues, it is not desirable to use resins containing chlorine (halogen), such as polyvinyl chloride resin, and it is preferable to use non-halogen thermoplastic resins. Among them, it is most desirable to use polyolefin resins or polyester resins (amorphous or biaxially oriented) from the viewpoints of various physical properties, processability, versatility, economy, etc.

[0015] As already listed, many types of polyolefin resins are known, and can be appropriately selected from among them depending on the intended use of the glitter decorative sheet, but the most suitable for general use are polypropylene resins, i.e., homopolymers or copolymers containing propylene as the main component. Specific examples include homopolypropylene resins, random polypropylene resins, block polypropylene resins, etc., either alone or in appropriate blends, and resins in which atactic polypropylene is further blended. Copolymers containing olefin monomers other than propylene are also acceptable, such as propylene-α-olefin copolymers having polypropylene crystalline portions and containing 15 mol% or more of comonomers of one or more α-olefins having 2 to 20 carbon atoms other than propylene, preferably ethylene, butene-1, 4-methylpentene-1, hexene-1, or octene-1. In addition, modifiers such as low-density polyethylene, ethylene-α-olefin copolymer, ethylene-propylene copolymer rubber, ethylene-propylene-non-conjugated diene copolymer rubber, styrene-butadiene copolymer or hydrogenated products thereof, which are usually used to soften polypropylene resins, can also be added as appropriate.

[0016] Other resins that can be used for the colored resin layer 3 include polybutylene terephthalate resin, copolymer polyester resin (commonly known as PET-G), and amorphous polyester resin (commonly known as A-PET).These resins have a lower calorific value when burned than olefin-based resins, so they can be used in applications where non-combustible properties are required.

[0017] The colored resin layer 3 may optionally contain one or more additives selected from the group consisting of colorants, fillers (e.g., silica, talc, titanium oxide, barium sulfate), UV absorbers, light stabilizers, heat stabilizers, antioxidants, antistatic agents, lubricants (e.g., stearic acid, metallic soaps), flame retardants, antibacterial agents, antifungal agents, antifriction agents, light scattering agents, and gloss adjusters. The colored resin layer 3 is often opaquely colored to conceal color variations and defects on the surface of the substrate to which the glossy decorative sheet is attached. However, transparent or translucent layers may also be used to highlight the texture of the substrate surface. The thickness of the colored resin layer 3 depends on the application, but is preferably approximately 50 to 100 μm. Particularly when applying for non-flammability certification, the resin type, thickness, heat generation, and other factors must be taken into consideration.

[0018] The adhesive layer 4 in the present invention is provided as needed to bond the colored resin layer 3 and the design layer 5, and can be omitted if the adhesive properties of other layers can be utilized. There are no particular restrictions on the type of adhesive used for the adhesive layer 4, but it is most desirable to use a two-component curing urethane adhesive that uses an isocyanate-based curing agent. Specifically, for example, polyester polyol or polyether polyol can be used as the base agent, and tolylene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, etc. can be used as the curing agent.

[0019] The design layer 5 in the present invention is provided on one side of the transparent thermoplastic resin layer 6 to impart a design element. A solid layer made of a colored solid ink or a glitter pigment ink may also be provided. It is generally formed using a printing ink or paint prepared by dissolving or dispersing a colorant such as a dye or pigment together with a suitable binder resin in a suitable diluent, using various printing methods such as gravure printing or offset printing, or various coating methods such as gravure coating or roll coating. Examples of binder resins that are commonly used include, but are not limited to, urethane resins, acrylic resins, vinyl chloride acetate resins, polyimide resins, soluble nitrocellulose, and mixtures thereof. The design may be any desired type, such as wood grain, stone grain, fabric grain, abstract patterns, geometric patterns, letters or symbols, or combinations thereof, and may be a solid color.

[0020] Basically, the same materials as those used in conventional general decorative sheets can be used for the transparent thermoplastic resin layer 6. Examples of resins include polyolefin resins such as polyethylene, polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, ethylene-α-olefin copolymer, and propylene-α-olefin copolymer; polyolefin-based resins such as olefin-based copolymer resins such as ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-(meth)acrylic acid (ester) copolymer, and ethylene-unsaturated carboxylic acid copolymer metal neutralized product (ionomer); polyethylene terephthalate, polybutylene terephthalate resin, polytetramethylene terephthalate, polyethylene naphthalate, polyethylene terephthalate-isophthalate copolymer, 1,4-cyclohexanedimethanol copolymerized polyethylene terephthalate, polyarylate, poly Examples of resins that can be used include polyester resins such as carbonate, acrylic resins such as poly(meth)acrylonitrile, polymethyl(meth)acrylate, polyethyl(meth)acrylate, polybutyl(meth)acrylate, and polyacrylamide, polyamide resins such as 6-nylon, 6,6-nylon, and 6,10-nylon, styrene resins such as polystyrene, AS resin, and ABS resin, vinyl resins such as polyvinyl chloride resin, polyvinyl acetate, polyvinyl alcohol, polyvinyl acetal, and polyvinyl butyral, and fluorine-containing resins such as polyvinyl fluoride, polyvinylidene fluoride, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer, and ethylene-perfluoroalkyl vinyl ether copolymer, as well as mixtures, copolymers, composites, and laminates of two or more of these resins.

[0021] Among the various thermoplastic resins mentioned above, in light of the recent growing social interest in environmental issues, it is not desirable to use resins containing chlorine (halogen), such as polyvinyl chloride resin, and it is preferable to use non-halogen thermoplastic resins. Among these, it is most desirable to use polyolefin resins or polyester resins (amorphous or biaxially oriented) in terms of various physical properties, processability, versatility, economic efficiency, etc. Of these, polyolefin resins have traditionally been increasingly used as materials for glittering decorative sheets to replace polyvinyl chloride resins, but their poor machinability has been noted. However, the present invention makes it possible to significantly improve machinability, and they are materials in which the effects of the present invention are most pronounced.

[0022] As already listed, many types of polyolefin resins are known, and one can select an appropriate one from among them depending on the intended use of the glitter decorative sheet, but the most suitable for general use are polypropylene resins, i.e., homopolymers or copolymers containing propylene as the main component. Specifically, for example, homopolypropylene resin, random polypropylene resin, block polypropylene resin, etc., can be used alone or in appropriate blends, or resins in which atactic polypropylene is further blended with these.

[0023] Copolymers containing olefin-based monomers other than propylene may also be used, such as propylene-α-olefin copolymers having polypropylene crystalline portions and containing 15 mol% or more of one or more comonomers selected from α-olefins having 2 to 20 carbon atoms other than propylene, preferably ethylene, butene-1, 4-methylpentene-1, hexene-1, and octene-1. Modifiers typically used to soften polypropylene resins, such as low-density polyethylene, ethylene-α-olefin copolymers, ethylene-propylene copolymer rubbers, ethylene-propylene-non-conjugated diene copolymer rubbers, styrene-butadiene copolymers, or hydrogenated versions thereof, may also be added as appropriate.

[0024] The transparent thermoplastic resin layer 6 may contain one or more additives selected from various additives such as fillers (silica, talc, titanium oxide, barium sulfate, etc.), ultraviolet absorbers, light stabilizers, heat stabilizers, antioxidants, antistatic agents, lubricants (stearic acid, metal soaps, etc.), flame retardants, antibacterial agents, antifungal agents, antifriction agents, light scattering agents, gloss adjusters, etc., as needed. The thickness of the transparent thermoplastic resin layer 6 is preferably 0.060 mm or more and 0.100 mm or less. Furthermore, the transparent thermoplastic resin layer 6 preferably has an elongation rate of 100% or more and 200% or less in both the longitudinal and transverse directions during a tensile test based on JIS K 7161. Furthermore, it is more preferable that the difference between the elongation rate in the longitudinal direction and the transverse direction be 20% or less. By limiting the thickness and elongation rate of the transparent thermoplastic resin layer 6 in this way, misregistration between the pattern layer 5, the transparent thermoplastic resin layer 6, and the glossy negative pattern layer 8 is suppressed.

[0025] The matte layer 7 is used to adjust the surface gloss. A two-component curing urethane resin is selected as its resin component (binder resin) for its versatility in adhesion with various transparent thermoplastic resin layers 6, its ability to conform to deformation when the multilayer glossy decorative sheet is bent into the duct grooves, and its scratch resistance. The matte layer 7 is obtained by coating a composition with or without a gloss adjuster (also called a matting agent or matting agent) added depending on the desired gloss. To achieve a high gloss surface, no gloss adjuster is added. To achieve a low gloss surface, a gloss adjuster is added.

[0026] Examples of gloss adjusters include inorganic particles such as silica, alumina (α-alumina, etc.), calcium carbonate, barium sulfate, kaolinite, and aluminosilicate, as well as organic particles (resins) such as polycarbonate, nylon, and urethane resin. The average particle size of the gloss adjuster is preferably about 1 to 10 μm, and the amount added is selected appropriately depending on the desired gloss, but is usually about 30% by mass at most.

[0027] The two-component curing urethane resin is a urethane resin that is mainly composed of a polyol and uses an isocyanate as a crosslinking agent (curing agent). The polyol has two or more hydroxyl groups in the molecule, such as polyethylene glycol, polypropylene glycol, acrylic polyol, polyester polyol, polyether polyol, polycarbonate polyol, polyurethane polyol, etc. The isocyanate is a polyvalent isocyanate that has two or more isocyanate groups in the molecule.

[0028] For example, aromatic isocyanates such as 2,4-tolylene diisocyanate, xylene diisocyanate, and 4,4'-diphenylmethane diisocyanate, or aliphatic (or alicyclic) isocyanates such as 1,6-hexamethylene diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, and hydrogenated diphenylmethane diisocyanate, can be used. Alternatively, adducts or polymers of the above-mentioned various isocyanates can be used. For example, adducts of tolylene diisocyanate and tolylene diisocyanate trimer can be used.

[0029] Among the above isocyanates, aliphatic (or alicyclic) isocyanates are preferred because they can provide good weather resistance and heat yellowing resistance, and specifically, for example, 1,6-hexamethylene diisocyanate can be used. A more realistic look can be achieved if the particle size of the inorganic pigment in the transparent gloss control layer is 2 to 3 μm and 3 to 4 μm, and the particle size of the inorganic pigment in the convex portions is 10 to 15 μm. From the viewpoint of design, it is preferable to add the above-mentioned gloss adjusting agents to make the gloss of the matte portion about 3 to 5 in terms of the reflection gloss coefficient value.

[0030] It is desirable that the glossy negative pattern layer 8 be in harmony with the pattern of the pattern layer 5. The glossy negative pattern layer 8 is made of a transparent pattern printed on the surface of the transparent thermoplastic resin layer 6 opposite to the pattern layer 5, with a gloss difference that is in harmony with the pattern layer 5. The ionizing radiation curable resin material for the glossy negative pattern layer 8 refers to a resin composition that has an energy quantum capable of crosslinking and polymerizing molecules in electromagnetic waves or charged particle beams, i.e., that is crosslinked and cured by irradiation with ultraviolet rays or electron beams, etc. Specifically, it can be appropriately selected from polymerizable monomers and polymerizable oligomers or prepolymers that are conventionally or commonly used as ionizing radiation or ultraviolet curable resin compositions.

[0031] Furthermore, in the case of decorative sheets that pass the application for non-combustible materials, the total heat generated by the front and back matching gloss matte decorative sheet 1 for 20 minutes after the start of heating is 7.2 MJ / m 2 Below, the heat generation rate is 200kW / m for 10 seconds or more 2 By satisfying the condition that the above condition is not exceeded, it is possible to obtain a front and back synchronized gloss matte decorative sheet 1 that is free from cracks reaching the back side and deformations that are harmful to fire prevention.

[0032] Typically, a (meth)acrylate monomer having a radically polymerizable unsaturated group in the molecule is suitable as the polymerizable monomer, and among these, a polyfunctional (meth)acrylate is preferred. Here, "(meth)acrylate" means "acrylate or methacrylate." The polyfunctional (meth)acrylate is not particularly limited as long as it is a (meth)acrylate having two or more ethylenically unsaturated bonds in the molecule. Specifically, ethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, hydroxypivalic acid neopentyl glycol di(meth)acrylate, dicyclopentanyl di(meth)acrylate, caprolactone-modified dicyclopentenyl di(meth)acrylate, ethylene oxide-modified phosphoric acid di(meth)acrylate, allylated cyclohexyl di(meth)acrylate, isocyanurate di(meth)acrylate, trimethylolpropane tri(meth)acrylate, ethylene oxide-modified trimethylolpropane tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, propionic acid-modified dipentaerythritol tri(meth)acrylate, acrylate, pentaerythritol tri(meth)acrylate, propylene oxide-modified trimethylolpropane tri(meth)acrylate, tris(acryloxyethyl)isocyanurate, propionic acid-modified dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, ethylene oxide-modified dipentaerythritol hexa(meth)acrylate, caprolactone-modified dipentaerythritol hexa(meth)acrylate, etc. These polyfunctional (meth)acrylates may be used alone or in combination of two or more.

[0033] In the present invention, monofunctional (meth)acrylates can be appropriately used in combination with the polyfunctional (meth)acrylates to reduce the viscosity, as long as the purpose of the present invention is not impaired. Examples of monofunctional (meth)acrylates include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, lauryl (meth)acrylate, stearyl (meth)acrylate, and isobornyl (meth)acrylate. These monofunctional (meth)acrylates may be used alone or in combination of two or more.

[0034] Next, examples of polymerizable oligomers include oligomers having radically polymerizable unsaturated groups in the molecule, such as epoxy (meth)acrylates, urethane (meth)acrylates, polyester (meth)acrylates, and polyether (meth)acrylates. Here, epoxy (meth)acrylate oligomers can be obtained, for example, by reacting (meth)acrylic acid with the oxirane ring of a relatively low-molecular-weight bisphenol epoxy resin or novolac epoxy resin to esterify it. Carboxyl-modified epoxy (meth)acrylate oligomers obtained by partially modifying these epoxy (meth)acrylate oligomers with dibasic carboxylic acid anhydrides can also be used. Urethane (meth)acrylate oligomers can be obtained, for example, by esterifying a polyurethane oligomer obtained by reacting a polyether polyol or polyester polyol with a polyisocyanate with (meth)acrylic acid. The polyester (meth)acrylate oligomer can be obtained by esterifying the hydroxyl groups of a polyester oligomer having hydroxyl groups at both ends, obtained by condensation of a polycarboxylic acid with a polyhydric alcohol, with (meth)acrylic acid, or by esterifying the terminal hydroxyl groups of an oligomer obtained by adding an alkylene oxide to a polycarboxylic acid with (meth)acrylic acid.The polyether (meth)acrylate oligomer can be obtained by esterifying the hydroxyl groups of a polyether polyol with (meth)acrylic acid.

[0035] Other polymerizable oligomers include highly hydrophobic polybutadiene (meth)acrylate oligomers having (meth)acrylate groups in the side chains of polybutadiene oligomers, silicone (meth)acrylate oligomers having polysiloxane bonds in the main chain, aminoplast resin (meth)acrylate oligomers obtained by modifying aminoplast resins having many reactive groups in a small molecule, and oligomers having cationically polymerizable functional groups in the molecule, such as novolac epoxy resins, bisphenol epoxy resins, aliphatic vinyl ethers, and aromatic vinyl ethers.

[0036] <Production method> First, a film layer having a thickness of 0.060 mm or more and 0.100 mm or less and an elongation rate of 100% or more and 200% or less in both the longitudinal and transverse directions in a tensile test based on JIS K 7161 is prepared as the transparent thermoplastic resin layer 6. A pattern to become the pattern layer 5 is printed on one surface of this transparent thermoplastic resin layer 6. Next, the matte layer 7 is coated on the other surface of the transparent thermoplastic resin layer 6 . Next, on the matte layer 7, a glossy negative pattern layer 8 is coated by, for example, gravure printing so as to match the pattern of the pattern layer 5.

[0037] Next, for example, a film layer is prepared as the colored resin layer 3, and the primer layer 2 is gravure coated on one surface of the colored resin layer 3. Next, an adhesive to be the adhesive layer 4 is applied between the surface of the colored resin layer 3 opposite to the surface coated with the primer layer 2 and the pattern layer 5 side of the transparent thermoplastic resin layer 6, and dry lamination is performed to obtain a front and back matching gloss matte decorative sheet 1.

[0038] <Effects> During the process of printing the pattern layer 5 on one side of the transparent thermoplastic resin layer 6, tension fluctuations can cause considerable elongation in the transparent thermoplastic resin layer 6. When the transparent thermoplastic resin layer 6 is elongated in this way, misregistration occurs in the subsequent process of printing the glossy negative pattern layer 8, reducing the design quality. The front and back synchronized gloss matte decorative sheet 1 according to this embodiment has limited thickness and elongation of the transparent thermoplastic resin layer 6. This makes it possible to suppress elongation of the transparent thermoplastic resin layer 6, and as a result, to suppress misregistration between the picture layer 5, the transparent thermoplastic resin layer 6, and the gloss negative picture layer 8.

[0039] Furthermore, because misregistration between the pattern layer 5, the transparent thermoplastic resin layer 6, and the glossy negative pattern layer 8 can be suppressed in this way, even when a raised resin layer is formed on the glossy negative pattern layer 8, misregistration between the pattern layer 5, the transparent thermoplastic resin layer 6, the glossy negative pattern layer 8, and the raised resin layer can be suppressed. This makes it possible to realize a front-back synchronized gloss matte decorative sheet 1 made of a non-combustible material with better design, and it is possible to provide, for example, a front-back synchronized gloss matte decorative sheet 1 that has a more realistic feel that is closer to that of real wood. This will allow us to expand our sales channels to users who have previously been particular about wood grain designs, leading to increased sales of wood grain printed sheets, which are industrial products.

[0040] Moreover, by replacing wood with a wood grain printed sheet using the front and back matching gloss matte decorative sheet 1, it is possible to save wood resources. In addition, because it has excellent stain resistance, it also leads to resource conservation as a durable consumer product. In particular, in the nursing care facilities for the elderly and senior residence market, where a wide variety of decorative sheets with wood grain patterns and the like are used, by using decorative sheets made of the noncombustible material according to this embodiment that have a more realistic appearance and excellent design, it is possible to provide a more comfortable space with excellent fire resistance. [Example]

[0041] The elongation percentage in each of the machine direction (MD) and cross direction (CD) was measured for films of different materials and thicknesses as the transparent thermoplastic resin layer 6. The elongation percentage was measured by performing a tensile test in accordance with JIS K-7161, pulling the film as a test object at a tensile speed of 200 mm / min and a measurement temperature of 23±2°C, and measuring the elongation percentage when the test object broke. The elongation percentage was calculated using the above-mentioned formula (1). As the tensile tester, for example, a Tensilon universal material testing machine or the like can be used.

[0042] The material, thickness and elongation of the film serving as the transparent thermoplastic resin layer 6 in Examples 1 to 4 and Comparative Examples 1 to 4 are as shown in Table 1. Next, films having the properties shown in Examples 1 to 4 and Comparative Examples 1 to 4 were used as the transparent thermoplastic resin layer 6 to produce front and back synchronized gloss matte decorative sheets 1. The front and back synchronized gloss matte decorative sheets 1 were produced under the same conditions except that the films used as the transparent thermoplastic resin layer 6 were different. The fabricated front and back matching gloss matte decorative sheet 1 has a pattern layer 5 and a transparent thermoplastic resin layer 6 Concave and convex shape The misregistration between the glossy negative pattern layer 8 and the glossy negative pattern layer 8 was measured. The measurement results are shown in Table 1.

[0043] The front and back synchronized gloss matte decorative sheets 1 produced using the films of Examples 1 to 4 and Comparative Examples 1 to 4 were evaluated for misregistration. The evaluation was performed with a score of "○" when the measured misregistration was less than 0.5 mm, a score of "△" when it was 0.5 mm or more, and an score of "×" when it was 1.0 mm or more. The results are shown in Table 1.

[0044] [Table 1]

[0045] As shown in Table 1, when a film made of low-density polyethylene LDPE (Comparative Example 3), which is normally used to soften polypropylene-based resins, and having a thickness of 0.060 mm was used as the film forming the transparent thermoplastic resin layer 6, the elongation in the tensile test was 600% in the MD and 720% in the CD, and the misregistration was 3.0 mm.

[0046] Furthermore, when any of polyolefin resin, polybutylene terephthalate resin, polyester resin, and polyvinyl chloride resin, which are commonly used for transparent thermoplastic resin layers, is used as the transparent thermoplastic resin layer 6, misregistration can be reduced compared to low-density polyethylene (Comparative Example 3). However, when the elongation (MD, CD) is relatively high (MD 480%, CD 500%) (Comparative Example 1 PP) or when the thickness is relatively high (0.150 mm) (Comparative Example 2 PP), misregistration is 0.5 mm or more, which is somewhat large. Furthermore, when the thickness is relatively small (0.020 mm) and the elongation is 210% MD, 210% CD (Comparative Example 4 PET), misregistration is 0.6 mm, which is somewhat large.

[0047] In contrast, it was confirmed that when the thickness was 0.060 mm or more and 0.100 mm or less and the elongation was 100% or more and 200% or less in both MD and CD (Examples 1 to 4), the misregistration was less than 0.5 mm, which was within the allowable range. Note that PBT was used as the transparent thermoplastic resin layer 6 in Example 1, PET in Example 2, and polyvinyl chloride resin in Examples 3 and 4.

[0048] The above describes the embodiments and examples of the present invention, but the front and back matching gloss matte decorative sheet 1 of the present invention is not limited to the above embodiments and examples, and various modifications are possible within the scope that does not impair the characteristics of the invention. [Explanation of symbols]

[0049] 1. Matching gloss matte decorative sheet 2 primer layers 3 Colored resin layer 4 Adhesive layer 5. Picture layer 6 Transparent thermoplastic resin layer 7 Matte layer 8 Glossy negative image layer

Claims

1. A method for producing a front-to-back synchronized gloss matte decorative sheet, comprising: a transparent thermoplastic resin layer; a pattern layer provided on one side of the transparent thermoplastic resin layer; and a matte layer and a glossy negative pattern layer laminated in this order on the other side of the transparent thermoplastic resin layer, wherein an uneven shape is formed from the matte layer to the transparent thermoplastic resin layer, and the uneven shape formed on the glossy negative pattern layer and the transparent thermoplastic resin layer are synchronized with the pattern layer, printing the design layer on the one surface of the transparent thermoplastic resin layer; applying the matte layer to the other surface of the transparent thermoplastic resin layer; and applying the glossy negative pattern layer on the matte layer in a manner consistent with the pattern layer, A method for manufacturing a front-to-back matching gloss matte decorative sheet, characterized in that the transparent thermoplastic resin layer has a thickness of 0.060 mm or more and 0.100 mm or less, and when tested in a tensile test based on JIS K 7161, the longitudinal elongation is 100% or more and 180% or less and the widthwise elongation is 120% or more and 200% or less, and the difference between the longitudinal elongation and the widthwise elongation is 30% or less.

2. 2. The method for manufacturing a front and back matching gloss matte decorative sheet according to claim 1, wherein a colored resin layer is provided on the surface of the design layer opposite to the transparent thermoplastic resin layer via an adhesive layer.

3. 3. The method for producing a front and back matching gloss matte decorative sheet according to claim 2, wherein a primer layer is provided on the surface of the colored resin layer opposite to the adhesive layer.

4. A method for manufacturing a front and back matching gloss matte decorative sheet described in any one of claims 1 to 3, characterized in that the transparent thermoplastic resin layer is a resin layer made of one of polyolefin resin, polybutylene terephthalate resin, polyester resin, and polyvinyl chloride resin.

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