JP2024006643A - Decorative sheet, decorative plate, and manufacturing method of decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative sheet which suppresses expansion and contraction of a transparent raw fabric, and enables easy and highly accurate formation of respective layers formed on both surfaces of the transparent raw fabric at those target positions.

SOLUTION: A decorative sheet 10 has: a transparent raw fabric 20 composed of a transparent olefin sheet; a printing pattern layer 50 and a colored layer 40 formed in this order on a rear face side of the transparent raw fabric 20; and a surface protective layer 60 formed on a surface side of the transparent raw fabric 20, wherein the transparent raw fabric 20 is added with a dispersion agent as a nano-sized additive, a laminate layer composed of another film is not provided on either of both surfaces of the transparent raw fabric 20, the transparent raw fabric 20 contains a transparent polypropylene-based thermoplastic resin, a yield point at 40°C or lower in a tensile test is 15 N/mm² or more, and an elongation rate when reaching the yield point is within 5%.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a decorative sheet, a decorative board, and a method for manufacturing a decorative sheet.

Traditionally, it has been applied to the interior and exterior of buildings, fittings, furniture (interior doors, entrance storage, etc.), fixtures (partitions, edges, baseboards, window frames, door frames, etc.), surface decorations such as flooring, etc. A decorative sheet is pasted on the surface to add design and durability. Olefin-based materials have been mainly used for this decorative sheet in recent years due to gas problems during combustion (see Patent Documents 1 to 3). For example, in order to protect the pattern from surface abrasion, a multilayer decorative sheet is widely used in which a transparent olefin sheet is laminated onto a colored olefin sheet with a pattern printed on it (Patent Document 2). (see paragraph [0034] and FIG. 1, and paragraph [0059] and FIG. 1 of Patent Document 3).

In addition, in recent years, decorative sheets with a high design quality have been produced in which the printed pattern and the pattern of the surface protective layer are synchronized.

Japanese Patent Application Publication No. 2006-110929 JP2015-199313A Japanese Patent Application Publication No. 2016-101663

The conventional decorative sheet described above requires a step of printing a pattern on a colored olefin sheet and a laminating step of pasting a transparent olefin sheet onto the pattern. Therefore, in order to match the pattern of the surface protective layer with the printed pattern, after printing the pattern on the colored original fabric, a transparent olefin sheet is laminated, and then a transparent olefin sheet is placed on top of the transparent olefin sheet so as to match the pattern. By applying a low gloss layer, it is necessary to synchronize the pattern of the surface protective layer with the pattern.

In other words, since the pattern printing and the low-gloss layer printing are performed in separate processes, it is necessary to adjust the printing position with high precision in order to synchronize the pattern and the low-gloss layer, which causes a lot of loss. .
In addition, if heat or tension is applied to these sheets during the bonding process of pasting together a colored olefin sheet with a pattern printed on it and a transparent olefin sheet, the colored olefin sheet with a pattern printed on it may expand or contract. As a result, there is a possibility that the printed pattern and the pattern of the low gloss layer are misaligned. Therefore, it is necessary to design a printing plate for a low-gloss layer by taking into consideration in advance the expansion and contraction of the sheet during the manufacturing process such as the bonding process.

The present invention has been made by focusing on these problems, and it suppresses the expansion and contraction of the transparent raw fabric and moves each layer formed on each side of the transparent raw fabric to a target position on each side of the transparent raw fabric. It is an object of the present invention to provide a decorative sheet, a decorative material, and a method for manufacturing a decorative sheet that can be easily formed with higher precision.

A decorative sheet according to one aspect of the present invention includes a transparent original fabric made of a transparent olefin sheet, a printed pattern layer and a colored layer formed in this order on the back side of the transparent original fabric, and a front side of the transparent original fabric. a surface protective layer formed on the transparent original fabric, the transparent original fabric has a dispersant as a nano-sized additive added thereto, and a laminate layer made of another film is formed on both sides of the transparent original fabric. The decorative sheet does not have any of the following: the transparent original fabric contains a transparent polypropylene-based thermoplastic resin, and has a yield point of 15 N/mm ² or more at 40° C. in a tensile test, and has reached the yield point. It is characterized by an elongation rate of 5% or less.
Further, a decorative board according to another aspect of the present invention is a decorative board using the decorative sheet of the above-mentioned form, wherein a substrate is adhered to the opposite side of the primer layer to the transparent original fabric. It is a feature.

Furthermore, in a method for manufacturing a decorative sheet according to another aspect of the present invention, a transparent polypropylene thermoplastic resin is extruded with a dispersant as a nano-sized additive, and the yield point in a tensile test is 40. A first step of producing a transparent raw fabric having an elongation of 15 N/mm ² or more at ℃ and an elongation rate of 5% or less when the yield point is reached; A second step of forming a printed pattern layer on the back side of the transparent original fabric, and after or prior to the second step, a surface protective layer is formed on the front side of the transparent original fabric. and a third step of laminating a low-gloss layer and a high-gloss layer as the surface protective layer, and in a plan view, the low-gloss layer is different from the high-gloss layer. A pattern is formed from a region where the low gloss layer and the high gloss layer overlap in a plan view, the pattern and the pattern of the printed pattern layer being at least the same in a plan view. It is characterized by being formed so that the parts overlap.

According to one aspect of the present invention, each layer formed on each side of a transparent original fabric can be formed at each target position easily and with higher precision.

1 is a cross-sectional view schematically showing an example of a decorative sheet according to Embodiment 1. FIG. FIG. 3 is a cross-sectional view schematically showing a modification of the decorative sheet according to Embodiment 1. FIG. 2 is a cross-sectional view schematically showing an example of a decorative sheet according to Embodiment 2. FIG. 3 is a cross-sectional view schematically showing a modification of the decorative sheet according to Embodiment 1. FIG. 7 is a cross-sectional view schematically showing a modification of the decorative sheet according to Embodiment 2.

(Embodiment 1)
One embodiment of the present invention (hereinafter referred to as "Embodiment 1") will be described below with reference to the drawings.
Here, the drawings are schematic, and the relationship between the thickness and planar dimensions, the ratio of the thickness of each layer, etc. are different from the reality. In addition, the embodiments shown below illustrate configurations for embodying the technical idea of the present invention, and the technical idea of the present invention is that the materials, shapes, structures, etc. of the component parts are It is not something specific. The technical idea of the present invention can be modified in various ways within the technical scope defined by the claims.

(Decorative sheet 10 according to Embodiment 1)
In FIG. 1, 10 is a decorative sheet, which is not shown, but is used indoors, for example, for fittings (interior doors, entrance storage), construction materials (partitions, edges, baseboards, window frames, door frames), etc. It is pasted on surfaces and used to match the patterns of fittings and fixtures for each house or room.
The decorative sheet 10 includes the following layers, and each layer is provided in order from (1).
Note that the following (1) to (5) will be described later.
(1) Primer layer 30
(2) Colored layer 40
(3) Printed pattern layer 50
(4) Transparent original fabric 20
(5) Surface protective layer 60
Note that each layer of the decorative sheet 10 is not limited to the above-mentioned (1) to (5), and as shown in FIG. Although not shown, an adhesive layer and a release paper may be added in this order to the primer layer 30 side to form a decorative tack sheet.
Moreover, the above-mentioned "(1) primer layer 30" may be omitted. That is, if the above "(2) colored layer 40" has a function as a primer layer, the primer layer 30 can be omitted.

(Transparent original fabric 20)
The transparent original fabric 20 serves as a support for the decorative sheet 10 and is made of a transparent olefin sheet.
The transparent original fabric 20 is formed of a single layer, and a dispersant as a nano-sized additive is added thereto.
Since the transparent original fabric 20 is a single layer, it can be easily made into a thin film, and by using nano-sized additives, the sheet can be made hard even with a thin film.

(Main features of decorative sheet 10)
The main features of the decorative sheet 10 according to the first embodiment are as follows.
(1) The decorative sheet 10 according to the first embodiment includes a printed pattern layer 50 in which a pattern is printed, a colored layer 40, and a primer layer on the back side of a transparent raw fabric 20, which is a single-layer film made of a transparent olefin sheet. 30 are formed in order, a surface protective layer 60 is formed on the front side of the transparent original fabric 20, and there is no laminate layer made of other films on either the front side or the back side of the transparent original fabric 20. A dispersant as a nano-sized additive is added to the transparent original fabric 20. Furthermore, the transparent raw fabric has a yield point of 15 N/mm ² or more at 40° C. in a tensile test, and an elongation rate of 5% or less when the yield point is reached.

According to the first embodiment, since there is no step of laminating other sheets when manufacturing the decorative sheet 10, the manufacturing steps from printing to applying the surface protective layer 60 can be performed in-line in one step.
In addition, the yield point in a tensile test is 15 N/mm ² or more at 40°C, the elongation rate when the yield point is reached is within 5%, and the yield point is 24 N/mm 2 at room temperature. ² or more and whose elongation rate is within 3% when the yield point is reached, so it is possible to suppress the expansion and contraction of the transparent fabric due to heat and tension applied during the manufacturing process. . Therefore, the surface protective layer and the printed pattern layer, which are formed on both sides of the transparent original fabric, can be formed at desired positions with higher precision. As a result, for example, the surface protective layer 60 is composed of a high-gloss layer and a low-gloss layer, which will be described later, and the low-gloss layer and the pattern of the printed pattern layer 50 overlap at least in part in a plan view. The pattern formed from the area where the high-gloss layer and the low-gloss layer visually overlap and the pattern of the printed pattern layer 50 can be synchronized with high accuracy, and the design quality is improved.

In addition, since it is possible to apply the printed pattern layer 50 and the surface protection layer 60 including a high gloss layer and a low gloss layer to the front and back sides of the transparent raw fabric 20, which is a transparent olefin sheet, in one step in-line, Can be easily synchronized.
Furthermore, according to Embodiment 1, since the conventional decorative sheet is multi-layered, there are limitations in film formation when thinning the sheet, and there are problems in that the hardness of the sheet cannot be obtained. Since the decorative sheet 10 according to Embodiment 1 is a single layer, it can be easily made into a thin film, and by using nano-sized additives, the sheet can be made hard even with a thin film.

(2) The decorative sheet 10 according to the first embodiment contains an inorganic filler in addition to a dispersant as a nano-sized additive.
Therefore, it is possible to further reduce the film thickness and improve scratch resistance.
(3) According to Embodiment 1, firstly, if the frame material is made of a single color, it becomes possible to deal with any interior door pattern in advance, so the door pattern can be decided later. It may also be possible to change the door due to its age without having to destroy the frame and replace it. Of course, the door itself can also be a single color. In addition, according to the first embodiment, secondly, by unifying all the rooms in an apartment with a single color, it becomes easier to increase the number of lots and increase productivity and lower the unit price. There are benefits to using it.

Furthermore, according to the first embodiment, thirdly, when it is desired to finish with a wood grain finish after finishing with white, the decorative sheet 10 according to the first embodiment is hard even if it is thin, so that the decorative sheet 10 can be finished with a wood grain finish later. It is also possible to change to
For example, if you later want to make the surface of a decorative board finished in white a woodgrain pattern, you can create a woodgrain pattern by laminating a decorative tack sheet using the decorative sheet 10 according to the first embodiment on top. It is also possible to change.

(4) If the colored layer 40 is transparent or semi-transparent, the decorative sheet 10 according to Embodiment 1 can be applied to a sheet with a natural wood or woodgrain base, while taking advantage of the base design and performance. Improvement and further design improvements are possible.
(5) The decorative board according to the first embodiment can be easily and quickly used as the decorative board 11 because the substrate 70 is adhered to the primer layer 30 side.
Further, by providing an adhesive layer and a release paper on the primer layer 30 side of the decorative sheet 10, a decorative tack sheet can be easily realized and bonded quickly.
(6) By using the method for manufacturing the decorative sheet 10 according to the first embodiment, the highly functional decorative sheet 10 can be manufactured simply and quickly.

(Primer layer 30)
As shown in FIG. 1, the primer layer 30 is located on the back side of the transparent original fabric 20, and is provided mainly for the purpose of improving adhesion.
The functions of the primer layer 30 include, in addition to improving adhesion, stabilizing the surface after surface treatment, preventing corrosion of the metal surface, imparting tackiness, and preventing deterioration of the adhesive.
The primer layer 30 is formed by applying a urethane resin to a solid content of 1 g/m ² using, for example, a gravure printing method.

(Colored layer 40)
As shown in FIG. 1, the colored layer 40 is located on the surface of the primer layer 30, is formed using a printing method, and is a concealing layer provided mainly for the purpose of imparting concealing properties.
The colored layer 40 is printed with a two-component urethane resin using, for example, a gravure printing method.
Note that the colored layer 40 may be a solid layer.

(Print pattern layer 50)
As shown in FIG. 1, the printed pattern layer 50 is located on the surface of the colored layer 40, is formed using a printing method, and is provided for the purpose of imparting design to the decorative sheet 10.
The printed pattern layer 50 has a pattern printed with urethane resin by, for example, a gravure printing method.
Examples of printing methods include, for example, gravure printing, but are not limited thereto, and various printing methods such as offset printing, letterpress printing, flexographic printing, screen printing, inkjet printing, and electrostatic printing can be used. The method is applicable.
The type of pattern of the printed pattern layer 50 is arbitrary depending on the purpose of use and the user's preference, and for example, a wood grain pattern, a stone grain pattern, an abstract pattern, etc. are common. The type of pattern is not limited to the types exemplified above, and may be, for example, full-surface solid printing.

As the printing ink used in the printing method, for example, salt-vinyl acetate-based ink (cyan, magenta, yellow) is used.
Although urethane resin is used as an example of the printing ink, it is not limited thereto, and colorants such as organic or inorganic dyes or pigments may also be used, as well as fillers, tackifiers, plasticizers, etc. It is dispersed in a binder made of synthetic resin, etc., along with appropriate additives such as stabilizers, dispersants, antifoaming agents, leveling agents, surfactants, and drying agents, as well as solvents or diluents. be.

(Surface protective layer 60)
The surface protective layer 60 is also referred to as a top coat, and as shown in FIG. It is provided for the purpose of imparting physical properties.
As shown in FIG. 1, the surface protection layer 60 is composed of a high gloss layer 61 applied to the surface of the transparent original fabric 20 and a low gloss layer 62 applied to the surface of the high gloss layer 61.
The high gloss layer 61 is formed by applying an acrylic two-component curing resin (acrylic urethane resin manufactured by DIC Graphics Co., Ltd.) to a thickness of 6 μm.

The low gloss layer 62 is formed by applying the same resin as the high gloss layer 61 but with a lower gloss. The low gloss layer 62 is designed to partially overlap the pattern of the printed pattern layer 50 in plan view. Therefore, the low gloss layer 62 is partially printed on the surface of the high gloss layer 61, as shown in FIG. Specifically, the low-gloss layer 62 is printed so that at least a portion thereof overlaps with the pattern 50a of the printed pattern layer 50 in a plan view, so that the low-gloss layer 62 and the high-gloss layer 61 overlap in a plan view. A surface protection layer 60 is formed in which the pattern formed from the area and the pattern 50a of the printed pattern layer 50 are in sync.

Note that here, a high-gloss layer 61 is formed on the transparent original fabric 20, and a low-gloss layer 62, which has a lower gloss than the high-gloss layer 61, is formed on the high-gloss layer 61. It is not limited to. For example, as shown in FIG. 2, it is also possible to form a low gloss layer 62 on the transparent original fabric 20, and to form a high gloss layer 61 on the transparent original fabric 20 including the low gloss layer 62. In this case, the high gloss layer 61 and the low gloss layer 62 overlap in a plan view on the surface of the surface protective layer 60 in a plan view, and the high gloss of the high gloss layer 61 and the low gloss layer 62 overlap. A surface protective layer 60 is formed in which a pattern having a gloss with a height determined by the height of the gloss is formed.
Furthermore, although the low gloss layer 62 is made to match the pattern 50a of the printed pattern layer 50, the area where the high gloss layer 61 and the low gloss layer 62 overlap in plan view and the area consisting only of the high gloss layer 61 are The pattern formed by the difference in gloss and the pattern 50a of the printed pattern layer 50 may be made to match.

(Transparent original fabric 20)
The transparent original fabric 20 is a single layer film made of transparent thermoplastic resin. A dispersant is added to the transparent original fabric 20 as a nano-sized additive. Moreover, a weathering agent is also blended into the transparent original fabric 20. Furthermore, an inorganic filler is added to the transparent original fabric 20. Note that the inorganic filler does not necessarily need to be added. The transparent original fabric 20 is formed by extrusion molding using, for example, a transparent polypropylene type thermoplastic resin. The film thickness of the transparent original fabric 20 is 50 μm or more and 120 μm or less.

In addition, the yield point of the transparent original fabric 20 in a tensile test is 15 N/mm2 or ^more in a temperature environment of 40°C, and the elongation rate is within 5% when the yield point is reached. Furthermore, at room temperature, the yield point in a tensile test is 24 N/mm ² or more, and the elongation rate at the time the yield point is reached is 3% or less. Note that the normal temperature here is 20° C.±15° C. (5° C. to 35° C.). In addition, a temperature environment of 40° means that printing is performed on the front side or the back side of the transparent original fabric 20 in order to form the printed pattern layer 50 or the colored layer 40, and when drying the transparent original fabric, The temperature is about 20 degrees.

(Nano-sized additives, etc. (nucleating agents))
The transparent original fabric 20 contains an inorganic filler in addition to a dispersant as a nano-sized additive. Hereinafter, nano-sized additives are also referred to as "nano-sized nucleating agents."
The nano-sized nucleating agent is preferably used by being added to the polypropylene resin in the form of a nucleating agent vesicle, which is encapsulated in a vesicle having a monolayer outer membrane.
Further, in the first embodiment, the nucleating agent in the resin constituting the transparent original fabric 20 may be encapsulated in a vesicle with a part of the nucleating agent exposed. Since the transparent original fabric 20 contains a nucleating agent, the degree of crystallinity can be improved, and the scratch resistance (scratch resistance) of the decorative sheet 10 can be improved.

(Particle size of nano-sized nucleating agent)
The average particle size of the nano-sized nucleating agent is preferably 1/2 or less of the wavelength range of visible light. Specifically, since the wavelength range of visible light is 400 nm or more and 750 nm or less, the average particle size is preferably 375 nm or less.
Since nano-sized nucleating agents have extremely small particle sizes, the number of nucleating agents present per unit volume and the surface area increase in inverse proportion to the cube of the particle diameter. As a result, the distance between each nucleating agent particle becomes shorter, so that when crystal growth occurs from the surface of one nucleating agent particle added to the resin, the end where the crystal is growing will immediately The nucleating agent particle contacts the end of a crystal growing from the surface of another nucleating agent particle adjacent to the nucleating agent particle, and the ends of each crystal inhibit the growth of each crystal, thereby stopping the growth of each crystal. Therefore, the average particle size of spherulites in the crystal part of the crystalline resin can be reduced, for example, the spherulite size can be reduced to 1 μm or less.

As a result, it is possible to create a highly hard resin film with a high degree of crystallinity, and the stress concentration between the spherulites that occurs during bending is efficiently dispersed, resulting in a resin that suppresses cracking and whitening during bending. film can be realized.
When a nucleating agent is simply added, the particle size increases due to secondary aggregation of the nucleating agent in the resin.
On the other hand, when adding nucleating agent vesicles, the dispersibility in the resin improves, so the number of crystal nuclei for the amount of nucleating agent added increases significantly compared to when the nucleating agent is simply added. do.

Therefore, the average particle size of spherulites in the crystalline portion of the resin becomes small, and the occurrence of cracks and whitening during bending can be suppressed. Therefore, by adding nucleating agent vesicles, the degree of crystallinity can be further increased, and it becomes possible to achieve both improved elastic modulus and processability.
For example, the transparent original fabric 20 preferably contains 0.05 parts by mass or more and 0.5 parts by mass or less, more preferably 0.1 parts by mass or more and 0.3 parts by mass, based on 100 parts by mass of polypropylene resin as the main component. It is formed from a resin material to which a nucleating agent is added within the following range.

When using a nucleating agent vesicle, the amount of the nucleating agent added to the resin material is the amount added in terms of the nucleating agent in the nucleating agent vesicle.
If the amount of the nucleating agent added is less than 0.05 parts by mass, the degree of crystallinity of the polypropylene may not be sufficiently improved, and the scratch resistance of the transparent original fabric 20 may not be sufficiently improved.
Furthermore, when the amount of the nucleating agent added exceeds 0.5 parts by mass, the growth of polypropylene spherulites is inhibited due to excessive crystal nuclei, and as a result, the crystallinity of polypropylene is not sufficiently improved. There is a possibility that the scratch resistance of the transparent original fabric 20 may not be sufficiently improved.
Here, the "main component" refers to a resin material that accounts for 50% by mass or more of the resin material that constitutes the transparent original fabric 20.

(Method for nano-izing nucleating agent)
In addition, methods for nano-forming nucleating agents include, for example, the solid phase method, which mainly involves mechanically crushing the nucleating agent to obtain nano-sized particles, and the solid phase method, which involves dissolving the nucleating agent or the nucleating agent. The liquid phase method involves synthesizing and crystallizing nano-sized particles in a nucleating solution, and the gas-phase method involves synthesizing and crystallizing nano-sized particles from a nucleating agent or gas/steam containing the nucleating agent. It can be used as appropriate.
Examples of solid phase methods include ball mills, bead mills, rod mills, colloid mills, conical mills, disk mills, hammer mills, jet mills, and the like.
Further, examples of the liquid phase method include a crystallization method, a coprecipitation method, a sol-gel method, a liquid phase reduction method, and a hydrothermal synthesis method. Further, examples of the gas phase method include an electric furnace method, a chemical flame method, a laser method, and a thermal plasma method.

(Supercritical reverse phase evaporation method)
As a method for nano-forming the nucleating agent, a supercritical reverse phase evaporation method is preferable. The supercritical reverse phase evaporation method is a method of creating capsules (nano-sized vesicles) containing a target substance using carbon dioxide under supercritical state, temperature conditions or pressure conditions above the critical point.
Carbon dioxide in a supercritical state means carbon dioxide in a supercritical state at a critical temperature (30.98°C) and a critical pressure (7.3773 ± 0.0030 MPa) or above, and under a temperature condition above the critical point or Carbon dioxide under pressure means carbon dioxide under conditions where only the temperature or only the pressure exceeds the critical condition.
In addition, as a specific nano-forming process using supercritical reversed-phase evaporation method, first, an aqueous phase is injected into a mixed fluid of supercritical carbon dioxide, phospholipids as an outer membrane forming substance, and a nucleating agent as an encapsulating substance. Then, by stirring, an emulsion of supercritical carbon dioxide and an aqueous phase is generated.

Next, by reducing the pressure, the carbon dioxide expands and evaporates, causing phase inversion, and the phospholipid generates nanocapsules (nanovesicles) in which the surface of the nucleating agent particles is covered with a single layer film.
By using this supercritical reversed-phase evaporation method, unlike conventional encapsulation methods in which the outer film forms a multi-layered film on the surface of the nucleating agent particles, it is possible to easily produce capsules with a single-layer film, making it more effective. Small diameter capsules can be prepared.
The nucleating agent vesicles are prepared by, for example, the Bangham method, extrusion method, hydration method, surfactant dialysis method, reverse phase evaporation method, freeze-thaw method, supercritical reverse phase evaporation method, or the like. Nucleating agent vesicles are preferably prepared using supercritical reverse phase evaporation.

(Outer membrane that constitutes the nucleating agent vesicle)
The outer membrane constituting the nucleating agent vesicle is composed of, for example, a single layer membrane. Further, the outer membrane is composed of a substance containing biological lipids such as phospholipids.
In this specification, a nucleating agent vesicle whose outer membrane is composed of a substance containing a biological lipid such as a phospholipid is referred to as a nucleating agent liposome.
Examples of the phospholipids constituting the outer membrane include phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidic acid, phosphatidylglycerol, phosphatidylinositol, cardiopine, egg yolk lecithin, hydrogenated egg yolk lecithin, soybean lecithin, and hydrogenated soybean lecithin. Examples include sphingophospholipids such as glycerophospholipids, sphingomyelin, ceramidephosphorylethanolamine, and ceramidephosphorylglycerol.

(Other substances that form the outer membrane)
Other substances forming the outer membrane of the vesicle include, for example, nonionic surfactants and dispersants such as mixtures of these and cholesterols or triacylglycerols.
Among these, examples of nonionic surfactants include polyglycerin ether, dialkylglycerin, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ether, polyoxyethylene sorbitan fatty acid ester, sorbitan fatty acid ester, polyoxyethylene polyoxypropylene Copolymers, polybutadiene-polyoxyethylene copolymers, polybutadiene-poly(2-vinylpyridine), polystyrene-polyacrylic acid copolymers, polyethylene oxide-polyethylethylene copolymers, polyoxyethylene-polycaprolactam copolymers, etc. One or more of these can be used. As the cholesterol, for example, cholesterol, α-cholestanol, β-cholestanol, cholestane, desmosterol (5,24-cholestadien-3β-ol), sodium cholate, or cholecalciferol can be used.

Furthermore, the outer membrane of the liposome may be formed from a mixture of a phospholipid and a dispersant.
In the decorative sheet 10 of the first embodiment, the nucleating agent vesicle is preferably a radical scavenger liposome having an outer membrane made of phospholipid. It is possible to improve the compatibility between the resin material which is the main component of the vesicles and the vesicles.

The nucleating agent is not particularly limited as long as it is a substance that serves as a starting point for crystallization when the resin crystallizes. Examples of the nucleating agent include phosphate metal salts, benzoate metal salts, pimelic acid metal salts, rosin metal salts, benzylidene sorbitol, quinacridone, cyanine blue, and talc. In particular, in order to maximize the effect of the nano treatment, it is preferable to use phosphate ester metal salts, benzoate metal salts, pimelic acid metal salts, and rosin metal salts, which are non-melting and can be expected to have good transparency. If the material itself can be made transparent by nano-processing, colored quinacridone, cyanine blue, talc, etc. can also be used. Furthermore, molten benzylidene sorbitol may be appropriately mixed with the non-molten nucleating agent.

(Characteristics of transparent raw fabric 20)
As described above, the decorative sheet 10 of the first embodiment is characterized in that the transparent raw fabric 20 contains a resin material and a nucleating agent.
Furthermore, the decorative sheet 10 of the first embodiment is characterized in that when forming the transparent original fabric 20, a nucleating agent encapsulated in vesicles is added to the resin material to crystallize the resin material. are doing. By adding the nucleating agent to the resin composition in a state in which it is encapsulated in vesicles, the dispersibility of the nucleating agent into the resin material, that is, into the transparent original fabric 20, can be dramatically improved. On the other hand, it may be difficult to directly identify the nucleating agent encapsulated in the vesicles based on the structure and characteristics of the finished decorative sheet 10, and this may be impractical. . The reason is as follows.

The nucleating agent added in the form of vesicles has high dispersibility and is in a dispersed state, and even in the state of the laminate which is the precursor of the created decorative sheet 10, the nucleating agent is added to the transparent original fabric 20. Highly distributed.
However, in the manufacturing process of the decorative sheet 10, the laminate is usually subjected to various treatments such as compression treatment and hardening treatment, and these treatments may cause the outer membrane of the vesicles containing the nucleating agent to fracture or cause chemical damage. A reaction may occur.
Therefore, due to the processing process of the decorative sheet 10, the outer membrane of the nucleating agent in the finished decorative sheet 10 may be crushed, or the state of chemical reaction may vary, and the nucleating agent may be enclosed (enveloped) in the outer membrane. There is a high possibility that it is not.

If the nucleating agent is not included in the outer membrane, it is difficult to specify the physical properties of the nucleating agent itself in a numerical range, and whether the constituent material of the fractured outer membrane is the outer membrane of the vesicle. It may be difficult to determine whether the material was added separately from the nucleating agent.
As described above, although the present disclosure differs from the conventional decorative sheet 10 in that the nucleating agent is blended in a highly dispersed manner, the nucleating agent is added in the form of vesicles containing the nucleating agent. There may be cases in which it is impractical to determine whether or not this is due to the structure and characteristics of the decorative sheet 10 based on a numerical range analyzed based on measurements.

(Method for manufacturing decorative sheet 10)
The decorative sheet 10 has the above-described configuration, and its manufacturing method includes the following first to third steps, and is manufactured in-line.
Here, "in-line" means that since there is no lamination process in which films are laminated together, printing, which normally requires multiple steps, can be performed in one line, that is, one line. That is, the manufacturing process from printing to applying the surface protective layer 60 can be performed in-line in one step.

(1) First step The first step is a step of extrusion molding a transparent polypropylene thermoplastic resin to produce a transparent original fabric 20 that is a single layer film. At this time, the yield point of the transparent original fabric 20 in a tensile test is 15 N/mm ² or more at 40°C, and the elongation rate when reaching the yield point is within 5%, and the tensile test The material is formed so as to have a yield point of 24 N/mm ² or more at room temperature, and an elongation rate of 3% or less when the yield point is reached.

(2) Second process The second process is a process of sequentially forming a printed pattern layer 50, a colored layer 40, and a primer layer 30 on the back side of the transparent original fabric 20 manufactured in the first process. be.
Note that the layers formed in the second step are not limited to the three layers of the printed pattern layer 50, the colored layer 40, and the primer layer 30, but may be, for example, only one layer including at least the printed pattern layer 50; In addition to the layer 50, one layer of the colored layer 40 or the primer layer 30 may be added, a total of two layers, or there may be four or more layers.

(3) Third step In the third step, after or prior to the second step, a surface protective layer 60 is applied to the surface side of the transparent original fabric 20 manufactured in the first step. This is the process of forming.
In the third step, after forming the high gloss layer 61, the low gloss layer 62 is formed. When laminating the low-gloss layer 62 on the high-gloss layer 61, the high-gloss layer 61 is formed after the second step and before forming the low-gloss layer 62, or the high-gloss layer 61 is formed in the first step. The high-gloss layer 61 may be formed between the first step and the second step, and then various layers may be formed in the second step, and then the low-gloss layer 62 may be formed in the third step.

Conversely, as shown in FIG. 2, when the high gloss layer 61 is laminated on the low gloss layer 62, after the second step, after forming the low gloss layer 62, A high gloss layer 61 is formed on the entire surface of the original fabric 20.
There are two orders of the steps: the order of the first step, the second step, and the third step, and the order of the first step, the third step, and the second step.

(Decorative board 11)
As shown in FIG. 1, the decorative board 11 is made by adhering a substrate 70 to the primer layer 30 side of the decorative sheet 10 having the above-described structure using an adhesive or the like. The decorative board 11 can also be constructed by providing an adhesive layer on the primer layer 30 side and directly bonding the substrate 70 to this adhesive layer.
Here, the substrate 70 may be made of any type of material such as wood, steel, resin, etc., but may be made of, for example, a noncombustible steel plate or a noncombustible material specified in Ministry of Construction Notification No. 1400.

(cosmetic tack sheet)
Although not shown, the decorative tack sheet is the decorative sheet 10 having the above-described configuration, with an adhesive layer and release paper attached to the primer layer 30 side.

(Other embodiments of the layer structure on the back side of the transparent original fabric 20)
Although the layer structure on the back side of the transparent original fabric 20 is not shown, the following embodiment may be used.
(a) Only the printed pattern layer 50 and the colored layer 40 may be formed in this order on the back side of the transparent original fabric 20.
(b) Only the printed pattern layer 50, colored layer 40, and primer layer 30 may be formed in this order on the back side of the transparent original fabric 20.

(Effects of Embodiment 1)
The decorative sheet 10 according to Embodiment 1 does not require a lamination process. Therefore, a series of steps from the first step of forming the transparent original fabric 20 to the second step of forming the printed pattern layer 50, the colored layer 40 and the primer layer 30, and the third step of forming the surface protection layer 60 are performed. The steps can be performed in-line in one step. Therefore, it is possible to reduce the loss that occurs when the pattern 50a of the printed pattern layer 50 and the low gloss layer 62 of the surface protection layer 60 are matched.

In addition, the transparent original fabric 20 is formed of a resin containing nano-sized additives to which a dispersant is added as a nano-sized nucleating agent, and the yield point in the tensile test is 15N/1 in a temperature environment of 40°C. mm ² or more, and the elongation rate at the time the yield point is reached is 5% or less, and the yield point at room temperature is 24 N/mm ² or more, and the elongation rate is 5% or less at the time the yield point is reached. We aim to keep the growth rate within 3%. That is, by adding the nucleating agent, the transparent raw fabric 20 becomes hard, making it difficult for expansion and contraction to occur. Even if a nano-sized nucleating agent does not contain a nano-sized additive with a dispersant added, the yield point in a tensile test is 15 N/mm ² or more in a temperature environment of 40 ° C. In addition, the resin has an elongation rate of 5% or less when the yield point is reached, is 24 N/mm ² or more at room temperature, and has an elongation rate of 3% or less when the yield point is reached. That's fine.

Therefore, in the step of forming the printed pattern layer 50, the colored layer 40, and the primer layer 30 on the back side of the transparent original fabric 20, and the step of forming the surface protection layer 60 on the front side of the transparent original fabric 20, the transparent Expansion and contraction of the transparent raw fabric 20 caused by forming various layers with tension applied to the raw fabric 20, or printing ink for forming the printed pattern layer 50 when forming each layer such as the printed pattern layer 50. When drying the printed ink after printing, expansion and contraction of the transparent original fabric 20 due to the temperature applied to the transparent original fabric 20 can be suppressed.

Here, when forming the printed pattern layer 50 and the surface protection layer 60 on the transparent original fabric 20, positioning marks are attached to the transparent original fabric 20 at a plurality of locations, and various layers are formed using these marks as a reference. is forming. Therefore, if tension is applied to the transparent fabric 20 or expansion or contraction occurs in the transparent fabric 20 due to the temperature environment, misalignment will occur even if each layer is formed using the positioning mark as a reference. As a result, even if the low gloss layer 62 of the surface protection layer 60 and the pattern 50a of the printed pattern layer 50 are designed to overlap in plan view, and each layer is formed as designed using the positioning mark as a reference, the transparent Since the strip 20 itself expands and contracts, the position of the pattern 50a of the printed pattern layer 50 and the formation position of the low-gloss layer 62 are misaligned, and the pattern 50a of the printed pattern layer 50 is located between the pattern 50a of the printed pattern layer 50 and the low-gloss layer 62 in plan view. Misalignment may occur.

However, in the decorative sheet 10 according to the first embodiment, since the expansion and contraction of the transparent original fabric 20 is suppressed, the position of the pattern 50a of the printed pattern layer 50 and the position of the low gloss layer 62 can be determined with higher accuracy in plan view. It is possible to form a decorative sheet 10 with high synchronization accuracy.

(Embodiment 2)
Next, a decorative sheet 10 according to a second embodiment of the present invention will be described.
In the decorative sheet 10 according to the second embodiment, the transparent original fabric 20 is composed of two types and three layers.
(Transparent original fabric 20)
As shown in FIG. 3, the transparent original fabric 20 is formed of two types of three layers in this order: a transparent skin layer 21, a transparent core layer 22 made of transparent polypropylene, and a transparent skin layer 21. In FIG. 3, the transparent raw fabric 20 is expressed as if the transparent core layer 22 and the transparent skin layer 21 form separate layers, but in reality, the transparent core layer 22 and the transparent skin layer 21 are continuous. The interface is a sheet that does not exist.

The transparent raw fabric 20 is coextruded so that the transparent skin layer 21:transparent core layer 22:transparent skin layer 21 has a thickness ratio of 0.5:9:0.5, and the total thickness is 50 μm or more and 120 μm or less. Create it so that it becomes.
In addition, the transparent raw fabric 20 has a yield point of 15 N/mm ² or more in a tensile test at a temperature of 40°C, an elongation rate of 5% or less at the time of reaching the yield point, and a yield point at room temperature. At the bottom, the elongation rate is 24 N/mm ² or more, and the elongation rate at the time of reaching the yield point is within 3%.

(Transparent skin layer 21)
In addition to a dispersant as a nano-sized additive, an inorganic filler is added to the transparent skin layer 21, and a transparent polypropylene resin is used. Note that the inorganic filler does not necessarily need to be added.
(Transparent core layer 22)
The transparent core layer 22 is made of, for example, a transparent polypropylene resin blended with a weathering agent. A dispersant as a nano-sized additive may be added to the transparent core layer 22.
(Resin material of transparent core layer 22)
Examples of the resin material constituting the transparent core layer 22 include thermoplastic resin. The thermoplastic resin is not particularly limited, and materials similar to the thermoplastic resins used for the base layer and the like in the conventional decorative sheet 10 can be used.

Examples of the thermoplastic resin include polyolefin resins such as polyethylene, polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, ethylene-α-olefin copolymer, propylene-α-olefin copolymer, polyethylene terephthalate, Polyester resins such as polybutylene terephthalate, polytetramethylene terephthalate, polyethylene naphthalate, polyethylene terephthalate-isophthalate copolymer, 1,4-cyclohexanedimethanol copolymer, polyethylene terephthalate, polyarylate, polycarbonate, ethylene-vinyl acetate copolymer olefin copolymer resins such as ethylene-vinyl alcohol copolymers, ethylene-(meth)acrylic acid (ester) copolymers, ethylene-unsaturated carboxylic acid copolymers, metal neutralized products (ionomers), etc. Polyolefin resins, poly(meth)acrylonitrile, polymethyl(meth)acrylate, polyethyl(meth)acrylate, polybutyl(meth)acrylate, acrylic resins such as polyacrylamide, 6-nylon, 6,6-nylon, 6,10- Polyamide resins such as nylon, styrene resins such as polystyrene, AS resin, and ABS resin, vinyl resins such as polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl acetal, and polyvinyl butyral, polyvinyl fluoride, polyvinylidene fluoride, Fluororesins such as polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer, ethylene-perfluoroalkyl vinyl ether copolymer, etc., or mixtures, copolymers, composites, laminates, etc. of two or more thereof. Can be used.

In particular, in view of the growing social concern about environmental issues in recent years, it is undesirable to use thermoplastic resins that contain chlorine (halogen), such as polyvinyl chloride resin, and it is preferable to use non-halogen-based thermoplastic resins. Preference is given to using thermoplastic resins.
In particular, polyester resins (amorphous or biaxially oriented) or polyolefin resins, especially polyolefin resins, are used as non-halogen thermoplastic resins in terms of physical properties, processability, versatility, and economic efficiency. Most preferably. For example, as the polyolefin resin, it is preferable to use a polypropylene resin containing 30% by mass or more and 100% by mass or less of a highly crystalline homopolypropylene resin having an isotactic pentad fraction (mmmm fraction) of 95% or more.

The transparent core layer 22 may contain fillers, ultraviolet absorbers, light stabilizers, heat stabilizers, antioxidants, antistatic agents, lubricants, flame retardants, antibacterial agents, antifungal agents, and antifungal agents, as necessary. One or more types selected from various additives such as an abrasive agent, a light scattering agent, and a gloss control agent may be added.

(Resin material of transparent skin layer 21)
Examples of the resin material constituting the transparent skin layer 21 include thermoplastic resin. The thermoplastic resin is not particularly limited, and the same resin material as the transparent core layer 22 can be used.
The transparent skin layer 21 preferably contains, for example, 0.05 parts by mass or more and 0.5 parts by mass or less, more preferably 0.1 parts by mass or more and 0.3 parts by mass, based on 100 parts by mass of polypropylene resin as the main component. It is formed from a resin material to which a nucleating agent is added within the following range.
When using a nucleating agent vesicle, the amount of the nucleating agent added to the resin material is the amount added in terms of the nucleating agent in the nucleating agent vesicle.
If the amount of the nucleating agent added is less than 0.05 part by mass, the degree of crystallinity of the polypropylene may not be sufficiently improved, and the scratch resistance of the transparent skin layer 21 may not be sufficiently improved.

Furthermore, when the amount of the nucleating agent added exceeds 0.5 parts by mass, the growth of polypropylene spherulites is inhibited due to excessive crystal nuclei, and as a result, the crystallinity of polypropylene is not sufficiently improved. There is a possibility that the scratch resistance of the transparent skin layer 21 will not be sufficiently improved.
Here, the term "main component" refers to a resin material that accounts for 50% by mass or more of the resin material that constitutes the transparent skin layer 21.
Note that the dispersant as a nano-sized additive may be added to either or both of the transparent core layer 22 and the transparent skin layer 21.
Note that other points in the second embodiment are given the same reference numerals as those in the first embodiment in FIG. 1, and explanations thereof will be omitted.

(Method for manufacturing decorative sheet 10 of Embodiment 2)
The method of manufacturing the decorative sheet 10 according to the second embodiment is the same as the method of manufacturing the decorative sheet 10 of the first embodiment except that the method of manufacturing the transparent raw fabric 20 is different, and the decorative sheet 10 is manufactured in-line. Ru.
The transparent original fabric 20 has a transparent core layer 22 made of a transparent polypropylene-based thermoplastic resin, and is located on the front and back sides of the transparent core layer 22, and has a dispersant as a nano-sized additive added to the thermoplastic resin. The added transparent skin layer 21 is formed as a single layer film by extrusion molding.

(Effects of Embodiment 2)
The transparent original fabric 20 in the decorative sheet 10 according to the second embodiment can suppress expansion and contraction, similarly to the decorative sheet 10 according to the first embodiment, so that the pattern 50a of the printed pattern layer 50 and the low gloss layer 62 can be synchronized with high precision, and losses in the manufacturing process can be reduced.
In addition, in the decorative sheet 10 of the first embodiment and the second embodiment, as shown in FIGS. 4 and 5, the surface protective layer 60 may be provided with an embossed portion 90 that matches the pattern 50a of the printed pattern layer 50. .

As shown in FIGS. 4 and 5, the embossed portion 90 is formed to extend deeply from the surface protection layer 60 to the transparent original fabric 20. By forming the embossed part 90 so as to extend from the surface of the surface protection layer 60 toward the transparent raw fabric 20 and partially penetrate into the transparent raw fabric 20, the outline of the recessed part becomes sharp and clear, creating a three-dimensional appearance. The design feeling can be further improved.

The embossed portion 90 is formed before the resin of the transparent original fabric 20 is cured. This is because the hardness of the resin constituting the transparent original fabric 20 increases after it is cured.
Although the embossed portion 90 gives an image of a certain height difference, the height difference between the high-gloss layer 61 and the low-gloss layer 62 is actually only on the order of several μm, and the surface protective layer 60 It has the same meaning as the expression that by applying a gloss/matte coat, it will match the pattern.

Examples and comparative examples of decorative sheets according to the present invention will be described below.
(Example 1)
A decorative sheet, which is a single-layer sheet, was created using the following materials and the following procedure.
First, a weathering agent, a dispersant as a nano-sized additive, etc. were added to a transparent polypropylene resin as a transparent original fabric. Extrusion molding was performed using a transparent polypropylene resin to which these were added, and a transparent original fabric having a thickness of 100 μm was created. In addition, the transparent raw fabric has a yield point of 15 N/mm ² or more in a tensile test of the transparent raw fabric alone in a temperature environment of 40°C, and when the yield point is reached in a temperature environment of 40°C. Created so that the elongation rate is within 5% at room temperature, the yield point is 24N/mm2 ^or more at room temperature, and the elongation rate is within 3% when the yield point is reached. did.

Second, on the back side of the transparent original fabric, a pattern that would become a printed pattern layer was printed using a urethane resin using a gravure printing method, and a colored layer was formed using a two-component urethane resin on the printed pattern layer.
Third, a high-gloss acrylic two-component curing resin (acrylic urethane resin manufactured by DIC Graphics Co., Ltd.) with a thickness of 6 μm was applied to the entire surface of the transparent original fabric as a high-gloss surface protective layer. On top of that, the same resin as the high-gloss layer, but with a lower gloss, is printed in a position that overlaps the pattern of the printed pattern layer in plan view, and a low-gloss layer that is in sync with the pattern of the printed pattern layer is formed. A decorative sheet for evaluation of Example 1 was obtained.
Note that the process of forming various layers on the back side of the transparent fabric and the process of forming a surface protective layer on the front side of the transparent fabric, which are performed after the process of forming the transparent fabric, were performed in-line. .

(Example 2)
In Example 2, a decorative sheet for evaluation was prepared using the same materials and procedures as in Example 1, except that the thickness of the transparent original fabric was 70 μm.
(Example 3)
In Example 3, a decorative sheet for evaluation was prepared using the same materials and procedures as in Example 1, except that the thickness of the transparent original fabric was 60 μm.

(Example 4)
As a transparent original fabric, the thickness is 100 μm, the yield point in a tensile test as a single unit is 15 N/ ^mm2 or more in a temperature environment of 40 °C, and the yield point is reached in a temperature environment of 40 °C. The elongation rate at the time of reaching the yield point is within 5%, the yield point is 24N/mm2 or ^more in a room temperature environment, and the elongation rate is within 3% at the time the yield point is reached. A decorative sheet for evaluation in Example 3 was prepared using the same materials and procedures as in Example 1, except that the prepared transparent polyethylene terephthalate resin was used.

(Comparative example 1)
The procedure was the same as in Example 1, except that the transparent original fabric was created without adding nano-sized additives to the transparent polypropylene resin that would become the transparent original fabric, that is, without adding any dispersant or inorganic filler. A decorative sheet for evaluation of Comparative Example 1 was prepared.
(Comparative example 2)
A decorative sheet for evaluation in Comparative Example 2 was prepared in the same manner as in Example 1, except that a transparent PVC sheet was used as the transparent original fabric.

(Performance evaluation method)
To evaluate the performance of the decorative sheet for evaluation, the following two characteristics were evaluated.
(1) Tensile test (yield point, elongation)
(2) Tuning accuracy and workability Each of the characteristics (1) and (2) was evaluated using the following procedure.
(1) Yield point and elongation)
The transparent raw fabrics prepared in Examples 1 to 4 and Comparative Examples 1 and 2 or the transparent PVC sheets used in place of the transparent raw fabrics were measured in accordance with JIS K7161-1 using an Autograph AGS-X (Co., Ltd.) measuring device. (manufactured by Shimadzu Corporation). The distance between the grips was 40 mm, the tensile speed was 50 mm/min, and the yield point and the elongation rate at the time when the yield point was reached were measured at room temperature and 40° C., respectively. In addition, the tensile test was conducted using a transparent original fabric or a transparent PVC sheet having the same characteristics as the transparent original fabric or transparent PVC sheet used instead of the transparent original fabric created in Examples 1 to 4 and Comparative Examples 1 and 2. The yield point and elongation were measured in accordance with JIS K7161-1.

(2) Synchronization accuracy and workability In the prepared decorative sheet for evaluation, what is the difference in plan view between the pattern formed from the area where the low gloss layer and high gloss layer overlap and the pattern in the printed pattern layer? The evaluation was conducted taking into consideration the degree of accuracy and workability when synchronizing. The evaluation criteria are as follows.
○: Synchronization accuracy is high (within 1 mm deviation) and the transparent raw fabric (or material equivalent to the transparent raw fabric) does not stretch or shrink, making it easy to work with. △: Synchronization accuracy is high, but the transparent raw fabric (or a member corresponding to the transparent original fabric) has elongation or shrinkage, resulting in poor workability. ×: There is a synchronization deviation (greater than 1 mm), and the transparent original fabric or the member equivalent to the transparent original fabric has elongation or shrinkage. Table 1 shows the evaluation results when shrinkage occurs and workability is poor.

All of the decorative sheets for evaluation in Examples 1 to 4 had a yield point of 15 N/mm ² or more in a temperature environment of 40°C, and an elongation rate of 5 when the yield point was reached. It was within %. Similarly, the decorative sheets for evaluation of Examples 1 to 4 had a yield point of 24 N/mm ² or more at room temperature, and an elongation rate of 3% or less when the yield point was reached. At this time, each evaluation sheet had high tuning accuracy and good workability.

On the other hand, the decorative sheet for evaluation of Comparative Example 1 has a yield point of 15 N/mm2 or ^more at room temperature, but it is lower than the yield points of Examples 1 and 2. The elongation rate at the time reached was within the allowable range at room temperature, but was outside the range of ±5% in a 40°C temperature environment. Therefore, the transparent original fabric prepared without adding nano-sized additives had an elongation rate of more than ±5% in a 40° C. temperature environment. This evaluation sheet had high synchronization accuracy but poor workability. Furthermore, in Comparative Example 2 in which a transparent PVC sheet was used instead of the transparent original fabric, the yield point at room temperature was 15 N/mm ² or more, but the yield point in a 40°C temperature environment was 15 N/mm ² or less. there were. Moreover, the elongation rate exceeded ±5%. This evaluation sheet had low tuning accuracy and poor workability.

As shown in Table 1, in Examples 1 to 4, it is possible to obtain a high synchronization accuracy and to provide a decorative sheet that suppresses deterioration of workability due to expansion and contraction of the transparent original fabric. can.
Further, for example, the present invention can take the following configuration.
(1)
A transparent original fabric made of a transparent olefin sheet,
A printed pattern layer and a colored layer formed in this order on the back side of the transparent original fabric;
a surface protective layer formed on the surface side of the transparent original fabric,
The transparent original fabric is a decorative sheet to which a dispersant as a nano-sized additive is added, and does not have a laminate layer made of another film on either side of the transparent original fabric,
The transparent original fabric contains a transparent polypropylene-based thermoplastic resin, has a yield point in a tensile test of 15 N/mm ² or more at 40°C, and has an elongation rate of 5% or less when the yield point is reached. A cosmetic sheet that is characterized by certain things.

(2)
The decorative sheet according to (1) above, wherein the yield point in a tensile test is 24 N/mm ² or more at room temperature, and the elongation rate when the yield point is reached is 3% or less.
(3)
The surface protective layer is formed by laminating a high-gloss layer and a low-gloss layer that partially overlaps the high-gloss layer in a plan view, and includes an area where the high-gloss layer and the low-gloss layer overlap in a plan view. The decorative sheet according to (1) or (2) above, wherein the decorative sheet has a pattern formed from the above, and the pattern and the pattern of the printed pattern layer at least partially overlap in plan view.

(4)
The decorative sheet according to any one of (1) to (3) above, wherein an inorganic filler is added to the transparent original fabric.
(5)
The decorative sheet according to any one of (1) to (4) above, wherein the transparent original fabric has two types and three layers laminated in this order: a transparent skin layer, a transparent core layer, and a transparent skin layer. .
(6)
The decorative sheet according to any one of (1) to (5) above, wherein a primer layer is formed on the back side of the transparent original fabric on the side furthest from the printed pattern layer.

(7)
The decorative sheet according to (6) above, further comprising an adhesive layer and a release paper on the side of the primer layer opposite to the transparent original fabric.
(8)
A decorative board using the decorative sheet according to (6) above, characterized in that a substrate is adhered to a side of the primer layer opposite to the transparent original fabric.

(9)
A transparent polypropylene-based thermoplastic resin is extruded by adding a dispersant as a nano-sized additive, and the yield point in a tensile test is 15 N/mm ² or more at both room temperature and 40°C, and , a first step of producing a transparent raw fabric whose elongation rate is within 5% when the yield point is reached;
a second step of forming a printed pattern layer on the back side of the transparent original fabric produced in the first step;
After the second step or prior to the second step, a third step of forming a surface protective layer on the surface side of the transparent original fabric,
The third step includes laminating a low-gloss layer and a high-gloss layer as the surface protective layer, and forming the low-gloss layer so as to partially overlap the high-gloss layer in plan view. , a pattern is formed from a region where the low gloss layer and the high gloss layer overlap in plan view and a region consisting only of the high gloss layer, so that the pattern and the pattern of the printed pattern layer are in sync with each other. A method for manufacturing a decorative sheet characterized by:

10 Decorative sheet 11 Decorative board 20 Transparent original fabric 21 Transparent skin layer 22 Transparent core layer 30 Primer layer 40 Colored layer 50 Printed pattern layer 60 Surface protection layer 61 High gloss layer 62 Low gloss layer 70 Substrate

Claims (9)

A transparent original fabric made of a transparent olefin sheet,
A printed pattern layer and a colored layer formed in this order on the back side of the transparent original fabric;
a surface protective layer formed on the surface side of the transparent original fabric,
The transparent original fabric is a decorative sheet to which a dispersant as a nano-sized additive is added, and does not have a laminate layer made of another film on either side of the transparent original fabric,
The transparent raw fabric contains a transparent polypropylene-based thermoplastic resin, has a yield point in a tensile test of 15 N/mm ² or more at 40°C, and has an elongation rate of 5% or less when reaching the yield point. A cosmetic sheet that is characterized by certain things. The decorative sheet according to claim 1, characterized in that the yield point in a tensile test is 24 N/mm ² or more at room temperature, and the elongation rate when the yield point is reached is 3% or less. The surface protective layer is formed by laminating a high-gloss layer and a low-gloss layer that partially overlaps the high-gloss layer in a plan view, and includes an area where the high-gloss layer and the low-gloss layer overlap in a plan view. 2. The decorative sheet according to claim 1, wherein the decorative sheet has a pattern formed from the above, and the pattern and the pattern of the printed pattern layer at least partially overlap in plan view. 3. The decorative sheet according to claim 1, wherein an inorganic filler is added to the transparent original fabric. 3. The decorative sheet according to claim 1, wherein the transparent original fabric has two types and three layers, each of which is laminated in this order: a transparent skin layer, a transparent core layer, and a transparent skin layer. 3. The decorative sheet according to claim 1, wherein a primer layer is formed on the back side of the transparent original fabric on the side farthest from the printed pattern layer. 7. The decorative sheet according to claim 6, further comprising an adhesive layer and a release paper on the opposite side of the transparent original fabric of the primer layer. 7. The decorative board using a decorative sheet according to claim 6, wherein a substrate is adhered to a side of the primer layer opposite to the transparent original fabric. A transparent polypropylene-based thermoplastic resin is extruded by adding a dispersant as a nano-sized additive, and the yield point in a tensile test is 15 N/mm ² or more at 40 ° C. A first step of manufacturing a transparent raw fabric whose elongation rate is within 5% when reached;
a second step of forming a printed pattern layer on the back side of the transparent original fabric produced in the first step;
After the second step or prior to the second step, a third step of forming a surface protective layer on the surface side of the transparent original fabric,
The third step includes a step of laminating a low gloss layer and a high gloss layer as the surface protective layer, and forming the low gloss layer so as to partially overlap the high gloss layer in a plan view, A pattern is formed from a region where the low gloss layer and the high gloss layer overlap in plan view, and the pattern is formed so that the pattern and the pattern of the printed pattern layer at least partially overlap in plan view. A method for manufacturing decorative sheets.

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