JP2024011838A - Decorative sheet, decorative plate and method for producing decorative sheet - Google Patents

Abstract

To provide a decorative sheet capable of easily and more precisely forming each layer on both sides of a transparent base material at the respective target positions.SOLUTION: There is provided a decorative sheet 10 which has a transparent raw fabric 20 made of a transparent olefin sheet, a printed pattern layer 50 and a coloring layer 40 formed on the back surface side of the transparent raw fabric 20 in sequence and a surface protective layer 60 formed on the surface side of the transparent raw fabric 20 and does not have laminate layers made of other films on either of both surfaces of the transparent raw fabric 20, wherein the transparent raw fabric 20 has a visible light transmittance of 85% or more.SELECTED DRAWING: Figure 1

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).
Furthermore, in recent years, decorative sheets with a high degree of design 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 Japanese Patent Application Publication No. 2015-199313 JP2016-101663A

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. .

Further, when creating a decorative sheet by laminating each layer on a colored original fabric, a method is used in which the stacking position of each layer is determined based on marks provided in advance on the colored original fabric. This mark is formed, for example, on the side of the colored original fabric on which the pattern printing layer is formed, and when printing the pattern printing layer, the mark provided on one side of the colored fabric is used as a landmark. When a pattern printing layer is formed on the side of the colored original fabric on which the mark is formed and a surface protective layer is formed, the colored original fabric is coated on the opposite side of the colored fabric from the side on which the pattern printing layer is formed. Form a surface protective layer using the mark on the original fabric as a guide. At this time, since the mark is provided on the side of the surface protective layer on which the pattern printing layer is formed, the mark is placed on the surface of the printed surface while referring to the mark provided on the side opposite to the printed surface. A protective layer will be formed, that is, the mark will be visible through the colored original fabric. Therefore, if the transparency of the colored material is low, it will be difficult to visually recognize the mark, and as a result, the stacking positions of the surface protection layer and the printed pattern layer formed on both sides of the colored material will shift, and the printed pattern layer will be There is a problem in that the accuracy of synchronization between the pattern and the pattern of the surface protective layer decreases.

The present invention has been made with attention to these problems, and each layer to be formed on each side of a transparent original fabric can be formed easily and with higher precision at the target position on each side of the transparent original fabric. It is an object of the present invention to provide a decorative sheet, a decorative board, and a method for manufacturing a decorative sheet that can be used to produce a decorative sheet.

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 decorative sheet having a surface protective layer formed on the transparent raw material, and having no laminate layer made of another film on either side of the transparent raw material, wherein the transparent raw material has a visible light transmittance. It is characterized by being 85% or more.

Further, a decorative laminate according to another aspect of the present invention is a decorative laminate using the decorative sheet of the above aspect, 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-based thermoplastic resin is extruded with a dispersant as a nano-sized additive, and the visible light transmittance is 85%. The first step of manufacturing the transparent original fabric as described above; the second step of forming a printed pattern layer on the back side of the transparent original fabric manufactured in the first step; After or before the second step, a third step of forming a surface protective layer on the surface side of the transparent original fabric, and the third step includes forming a low gloss layer as the surface protective layer. and a high-gloss layer, and laminating the low-gloss layer so that it partially overlaps the high-gloss layer in a plan view, and the low-gloss layer and the high-gloss layer are stacked in a plan view. A pattern is formed from an area in which the two layers overlap and a region consisting only of the high-gloss layer, and the low-gloss layer and the pattern of the printed pattern layer at least partially overlap in plan view.

According to one aspect of the present invention, each layer formed on each of both surfaces 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. The transparent original fabric 20 has a visible light transmittance of 85% or more.
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, since the visible light transmittance of the transparent raw fabric 20 is 85% or more, in the manufacturing process of the decorative sheet 10, the positioning marks formed on one side of the transparent raw fabric 20 can be viewed from the other side. , can be easily seen through the transparent original fabric 20. Therefore, by forming the printed pattern layer 50 and the surface protective layer 60 on each of both sides of the transparent original fabric 20 based on the positioning mark, the printed pattern layer 50 and the surface protective layer 60 can be positioned with higher precision. In other words, each layer can be formed at a targeted position on the transparent original fabric 20. As a result, for example, when 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 is synchronized with the pattern 50a of the printed pattern layer 50, in other words, the low-gloss layer and the printed pattern layer 50 Even in the case where at least a part of the pattern overlaps with the pattern in plan view, the low gloss layer and the pattern 50a of the printed pattern layer 50 can be synchronized with high precision, and the design is improved.

Moreover, since the printed pattern layer 50 and the surface protection layer 60 can be formed on the front and back sides of the transparent original fabric 20, which is a transparent olefin sheet, in one step, synchronization can be easily achieved.
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) 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.

(5) 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 has a pattern that is synchronized with the printed pattern layer 50. That is, 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 in a position overlapping with the pattern 50a of the printed pattern layer 50 in a plan view, and the low gloss layer 62 is exposed without being formed in a plan view. The high-gloss layer 61 forms a surface protective layer 60 whose surface is composed of a part of the high-gloss layer 61 and a low-gloss layer 62, and the low-gloss layer 62 is synchronized with the pattern 50a of the printed pattern layer 50. .

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 including the low gloss layer 62 on the transparent original fabric 20. . In this case, the surface of the surface protection layer 60 in a plan view is an area where the high gloss layer 61 and the low gloss layer 62 overlap 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, which is composed of a glossy area with a height determined by the gloss height, and an area consisting only of the high gloss layer 61, and a glossy area with the height of the high gloss layer 61.

In addition, although the low gloss layer 62 is made to match the pattern 50a of the printed pattern layer 50, the low gloss layer 62 is not formed on the high gloss layer 61 and the high gloss layer 61 is exposed in the part. However, the pattern 50a of the printed pattern layer 50 may be synchronized with the pattern 50a of the printed pattern layer 50, that is, the difference in gloss between the area where the high gloss layer 61 and the low gloss layer 62 overlap and the area consisting only of the high gloss layer 61 in plan view. The pattern formed by this may be synchronized with the pattern 50a of the printed pattern layer 50.

(Transparent original fabric 20)
The transparent original fabric 20 is a single layer film made of a transparent olefin sheet. 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.
Moreover, the transparent original fabric 20 as a single substance has a visible light transmittance of 85% or more. Note that the visible light transmittance is, for example, when transmittance is measured within the visible light region (measurement wavelength 380 nm to 780 nm) using a spectrophotometer UV-3600 (manufactured by Shimadzu Corporation) using an integrating sphere. is specified as the average value of transmittance at each wavelength.

(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. Furthermore, 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 monolayer film.
By using this supercritical reversed-phase evaporation method, unlike the conventional encapsulation method in which the outer film forms a multilayer film on the surface of the nucleating agent particles, it is possible to easily produce capsules with a single layer film. 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. May react.
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 transparent original fabric 20 is formed so that the visible light transmittance is 85% or more.
(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, the high gloss layer 61 is formed after the low gloss layer 62 is formed after the second step. .
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)
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.

Further, the transparent original fabric 20 is given a property that the visible light transmittance is 85% or more. Therefore, when the printed pattern layer 50 is provided on the back side of the transparent original fabric 20 and the surface protective layer 60 is provided on the front side, based on the mark provided in advance on the back side of the transparent original fabric 20, the transparent original fabric 20 is When printing the printed pattern layer 50 on the back side, since a positioning mark is provided on the back side of the transparent raw fabric 20, that is, the surface on which the printed pattern layer 50 is printed, this mark is directly visible. Therefore, the printed pattern layer 50 can be accurately printed at a target position on the transparent original fabric 20 using the mark as a reference. On the other hand, when the surface protection layer 60 is provided on the front side of the transparent raw fabric 20, the mark is provided on the back side of the transparent raw fabric 20, so the mark is visible through the transparent raw fabric 20. However, since the transparent raw fabric 20 has a visible light transmittance of 85% or more, the mark provided on the back side of the transparent raw fabric 20 can be clearly seen even from the front side through the transparent raw fabric 20. can. Therefore, by forming the surface protective layer 60 using the mark provided on the back side of the transparent raw fabric 20 as a reference, the surface protective layer 60 can be accurately printed at the target position on the transparent raw fabric 20. can. As a result, each layer can be formed at each target position on the front side and the back side of the transparent original fabric 20. Therefore, the pattern 50a of the printed pattern layer 50 formed on one side with the transparent original fabric 20 in between, and the surface formed on the other side, which is formed from a high gloss layer 61 and a low gloss layer 62 in plan view. The pattern of the protective layer 60 can be synchronized with high precision.

If the visible light transmittance of the transparent original fabric 20 is lower than 85%, it may be difficult to see the mark provided on the back side of the transparent original fabric 20 from the front side of the transparent original fabric 20. . If the surface protective layer 60 is printed in a state where it is difficult to visually recognize the mark that serves as a reference for positioning, the position of the surface protective layer 60 on the transparent original fabric 20 will shift from the target position, and as a result, There is a possibility that the pattern 50a of the printed pattern layer 50 and the pattern of the surface protection layer 60 formed from the high gloss layer 61 and the low gloss layer 62 may be misaligned in plan view. However, in the decorative sheet 10 according to the first embodiment, since the visible light transmittance of the transparent original fabric 20 is 85% or more, the mark provided on the back side of the transparent original fabric 20 is Since it is clearly visible even from the side, it is possible to form a decorative sheet 10 in which the pattern 50a of the printed pattern layer 50 and the pattern of the surface protection layer 60 are highly synchronized.

Further, a dispersant as a nano-sized additive is added to the transparent original fabric 20. Therefore, the sheet can be made hard even if it is a thin film, and as a result, tension is applied to the transparent raw fabric 20 during the manufacturing process, or expansion and contraction that occurs in the transparent raw fabric 20 due to temperature environment etc. can be suppressed. Can be done. Therefore, it is possible to suppress a decrease in workability due to expansion and contraction of the transparent original fabric 20.

(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. It is a sheet with no interface.
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 like this.
Further, the transparent original fabric 20 has a visible light transmittance of 85% or more.

(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. Furthermore, a dispersant as a nano-sized additive may be added to the transparent core layer 22 as well.
(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, as necessary, fillers, ultraviolet absorbers, light stabilizers, heat stabilizers, antioxidants, antistatic agents, lubricants, flame retardants, antibacterial agents, antifungal agents, polishing agents, etc. One or more kinds of additives selected from various additives such as a light scattering agent, a light scattering agent, and a gloss adjusting 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 has a positioning mark provided on the back side of the transparent original fabric 20 on the surface of the transparent original fabric 20, similarly to the decorative sheet 10 according to the first embodiment. Since it is clearly visible even from the side, the pattern 50a of the printed pattern layer 50 and the pattern of 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. .

The embossed portion 90 is formed to extend deeply from the surface protection layer 60 to the transparent original fabric 20, as shown in FIGS. 4 and 5. 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. The transparent original fabric had a visible light transmittance of 89%.
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 two-component acrylic curing resin (acrylic urethane resin manufactured by DIC Graphics Co., Ltd.) was applied to a thickness of 6 μm as an undercoat layer for the surface protective layer on the entire surface side of the transparent original fabric. A high-gloss layer is formed by coating, and on top of that, the same resin as the high-gloss layer, but with a lower gloss, is printed at a position that overlaps the pattern of the printed pattern layer in plan view, and the pattern of the printed pattern layer is printed. A decorative sheet for evaluation of Example 1 was obtained by forming a low gloss layer in synchronization with the above.
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, are performed in-line. did.

(Example 2)
In Example 2, a decorative sheet for evaluation was prepared using the same materials and procedures as in Example 1, except that embossed portions were provided on the surface side of the transparent original fabric. The visible light transmittance of the evaluation decorative sheet of Example 2 was 86%.
(Example 3)
In Example 3, the same materials and procedures as in Example 1 were used, except that an inorganic filler was added in place of the dispersant as a nano-sized additive so that the visible light transmittance was 85%. A decorative sheet for evaluation of Example 3 was created.

(Comparative example 1)
First, a pattern was printed on one side of a colored polypropylene sheet using a urethane resin using a gravure printing method.
Second, a transparent polypropylene sheet was laminated onto one side of the colored polypropylene sheet containing the pattern.
Third, in the same manner as in Example 1, a high-gloss acrylic two-component curing resin (manufactured by DIC Graphics Co., Ltd.) was applied as an undercoat layer for the surface protective layer on the opposite side of the transparent polypropylene sheet from the colored polypropylene sheet. Acrylic urethane resin) is applied to a thickness of 6 μm to form a high-gloss layer, and on top of that, the same resin as the high-gloss layer, but with a lower gloss, is applied to the printed pattern and in plan view. A decorative sheet for evaluation of Comparative Example 1 was obtained by printing in the overlapping position to form a low gloss layer that matches the printed pattern. The visible light transmittance of the transparent original fabric was 87%.

(Comparative example 2)
In Comparative Example 2, a decorative sheet for evaluation of Comparative Example 1 was obtained using the same materials and procedures as in Example 1, except that the resin used for the transparent original fabric was a vinyl chloride resin. The visible light transmittance of the transparent original fabric was 77%.
(Comparative example 3)
A decorative sheet for evaluation of Comparative Example 3 was obtained using the same materials and procedures as in Example 3, except that an inorganic filler was added so that the visible light transmittance was 80%.

(Performance evaluation method)
To evaluate the performance of the decorative sheet for evaluation, the following two characteristics were evaluated.
(1) Visible light transmittance (2) Tuning accuracy and workability Each characteristic (1) and (2) was evaluated using the following procedure.

(1) Visible light transmittance was measured using a spectrophotometer UV-3600 (manufactured by Shimadzu Corporation) using an integrating sphere in the visible light region (wavelengths from 380 nm to 780 nm). Specifically, the average value of the transmittance at each wavelength within the visible light region (measurement wavelength 380 nm to 780 nm) was calculated. The visible light transmittance was measured using the transparent original fabrics prepared in Examples 1 and 2 and Comparative Examples 1 and 2, the colored polypropylene sheet used as a substitute for the transparent original fabric, and the same properties as the transparent PVC sheet. Visible light transmittance was measured using a transparent original fabric, a colored polypropylene sheet, and a transparent PVC sheet.
The evaluation criteria are as follows.
○: Visible light transmittance is 85% or more ×: Visible light transmittance is less than 85% If the visible light transmittance is 85% or more, the pattern layer is sufficiently visible, making it easy to synchronize the pattern layer and the low gloss layer. it is conceivable that.

(2) Synchronization Accuracy For each decorative sheet for evaluation that was prepared, the degree of misalignment between the pattern of the low gloss layer and the pattern of the printed pattern layer was evaluated. The evaluation criteria are as follows.
Good: The tuning accuracy is high (the deviation is within 1 mm), and there is no elongation or shrinkage of the transparent original fabric (or a member corresponding to the transparent original fabric).
Δ: The tuning accuracy is high, but there is some elongation or shrinkage of the transparent original fabric (or a member equivalent to the transparent original fabric).
×: There is a shift in synchronization (greater than 1 mm), and the transparent original fabric (or a member corresponding to the transparent original fabric) has elongated or shrunk.

(3) Workability ○: There is no stretching or shrinkage of the transparent material, making it easy to work.
△: There was some elongation and shrinkage of the transparent original fabric, and workability was not very good.
×: There was some elongation and shrinkage of the transparent original fabric, and workability was poor.
Then, a comprehensive evaluation was performed based on the evaluation results of (1) visible light transmittance, (2) tuning accuracy, and (3) workability. The evaluation criteria for the comprehensive evaluation are as follows.
Good: The evaluation results for (1) visible light transmittance, (2) tuning accuracy, and (3) workability are all “Good”.
Δ: At least one of the evaluation results for (1) visible light transmittance, (2) tuning accuracy, and (3) workability is rated “Δ”.
×: There is an “×” in at least one of the evaluation results among (1) visible light transmittance, (2) tuning accuracy, and (3) workability.

The overall evaluation results are shown in Table 1.

The decorative sheets for evaluation of Examples 1 to 3 all had a visible light transmittance of 85% or more. Therefore, the positioning marks provided on the transparent original fabric can be clearly seen, and the layers provided on both sides of the transparent original fabric can be positioned easily and with high precision, resulting in a high level of synchronization accuracy. I was able to obtain a decorative sheet. Further, in Examples 1 and 2, since nano-sized additives were added, it was possible to suppress the expansion and contraction of the transparent original fabric during the working process, and the workability was also good.

On the other hand, the decorative sheet for evaluation of Comparative Example 1 has a two-layer structure in which a pattern layer is formed on a colored polypropylene sheet, a transparent polypropylene sheet is formed on top of the pattern layer, and a protective layer is formed on the transparent polypropylene sheet. Therefore, the tuning accuracy was not very good and the workability was poor.
Furthermore, in the decorative sheet for evaluation of Comparative Example 2, the visible light transmittance of the PVC resin used for the transparent original fabric was less than 85%, so the synchronization accuracy was low, and expansion and contraction during the manufacturing process could not be suppressed. The sex was also bad.
The evaluation decorative sheet of Comparative Example 3 had a visible light transmittance of less than 85%, and therefore had low tuning accuracy.

As shown in Table 1, high tuning accuracy could be obtained in Examples 1, 2, and 3. Moreover, in Examples 1 and 2, it is possible to provide a decorative sheet in which deterioration in workability due to the bonding process and the like is suppressed.

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,
A decorative sheet that does not have a laminate layer made of another film on either side of the transparent original fabric,
A decorative sheet characterized in that the transparent original fabric has a visible light transmittance of 85% or more.
(2)
The decorative sheet according to (1) above, wherein the transparent original fabric contains a transparent polypropylene-based thermoplastic resin, and a dispersant as a nano-sized additive is added thereto.
(3)
The decorative sheet according to (1) or (2) above, 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.
(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 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. and a region consisting only of the high-gloss layer, and the low-gloss layer and the pattern of the printed pattern layer at least partially overlap in plan view (1). ) to (4).
(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 first step of adding a dispersant as a nano-sized additive to a transparent polypropylene thermoplastic resin and extruding it to produce a transparent original fabric having a visible light transmittance of 85% or more;
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 laminating 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, and the pattern of the low-gloss layer and the printed pattern layer is at least A method for producing a decorative sheet characterized by partially overlapping parts.

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,
A decorative sheet that does not have a laminate layer made of another film on either side of the transparent original fabric,
A decorative sheet characterized in that the transparent original fabric has a visible light transmittance of 85% or more. 2. The decorative sheet according to claim 1, wherein the transparent original fabric contains a transparent polypropylene-based thermoplastic resin, and a dispersant as a nano-sized additive is added thereto. 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 an inorganic filler is added to the transparent original fabric. 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. and a region consisting only of the high-gloss layer, and the low-gloss layer and the pattern of the printed pattern layer at least partially overlap in plan view. Or the decorative sheet according to claim 2. 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 a side of the primer layer opposite to the transparent original fabric. 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 first step of adding a dispersant as a nano-sized additive to a transparent polypropylene thermoplastic resin and extruding it to produce a transparent original fabric having a visible light transmittance of 85% or more;
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 laminating 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, and the pattern of the low-gloss layer and the printed pattern layer is at least A method for producing a decorative sheet characterized by partially overlapping parts.

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