WO2021085305A1 - 樹脂含浸化粧紙、及び樹脂含浸化粧板 - Google Patents

樹脂含浸化粧紙、及び樹脂含浸化粧板 Download PDF

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Publication number
WO2021085305A1
WO2021085305A1 PCT/JP2020/039763 JP2020039763W WO2021085305A1 WO 2021085305 A1 WO2021085305 A1 WO 2021085305A1 JP 2020039763 W JP2020039763 W JP 2020039763W WO 2021085305 A1 WO2021085305 A1 WO 2021085305A1
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Prior art keywords
resin
layer
impregnated decorative
impregnated
decorative paper
Prior art date
Application number
PCT/JP2020/039763
Other languages
English (en)
French (fr)
Inventor
千穂 原田
隆弘 伊瀬谷
Original Assignee
凸版印刷株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 凸版印刷株式会社 filed Critical 凸版印刷株式会社
Priority to CN202080072131.4A priority Critical patent/CN114555368A/zh
Priority to EP20882853.3A priority patent/EP4052897A4/en
Priority to US17/771,001 priority patent/US20220363044A1/en
Publication of WO2021085305A1 publication Critical patent/WO2021085305A1/ja

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    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B29/007—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a foam layer
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    • B32B21/06—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
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Definitions

  • the present invention relates to a resin-impregnated decorative paper and a resin-impregnated decorative board.
  • a metal plate is brought into contact with a laminate of a resin-impregnated decorative paper impregnated with a thermosetting resin and a base material, and heat-pressurization molding is performed to integrate the resin-impregnated decorative paper and the base material.
  • a method for manufacturing a resin-impregnated decorative board for obtaining a resin-impregnated decorative board has been proposed (see, for example, Patent Document 1).
  • an embossed shape is provided on the metal plate to give an uneven pattern to the surface of the resin-impregnated decorative board to give a feeling of touch. It is also possible to add a gloss matte expression by adjusting the coarse density of the embossed shape.
  • the present invention has been made by paying attention to the above-mentioned problems, and is a resin-impregnated decorative paper which is excellent in gloss matte expression and touch feeling while suppressing cost, and has improved stain resistance and design stability after long-term storage.
  • An object of the present invention is to provide a resin-impregnated decorative board.
  • the resin-impregnated decorative paper according to one aspect of the present invention is a resin-impregnated decorative paper obtained by impregnating a decorative paper with an impregnated resin, and the decorative paper includes a base paper, a pattern layer provided on the surface side of the base paper, and a pattern.
  • a thermosetting resin layer comprising a foamed resin layer formed by a foaming agent arranged on the surface of the pattern layer or in the pattern layer and a thermosetting resin layer provided on the surface of the foamed resin layer. Includes at least one of an epoxy resin, a casein resin, an acrylic resin, and a urethane resin.
  • the resin-impregnated decorative board according to another aspect of the present invention includes a resin-impregnated decorative paper and a base material integrated with the resin-impregnated decorative paper.
  • the foaming agent can be foamed by heat and pressure molding, and an uneven pattern can be appropriately formed on the surface of the resin-impregnated decorative paper. Since it is not necessary to prepare a metal plate for each uneven pattern, it is possible to provide a resin-impregnated decorative paper and a resin-impregnated decorative plate having excellent gloss matte expression and touch feeling while suppressing the cost. Further, by providing a thermosetting resin layer containing at least one of an epoxy resin, a casein resin, an acrylic resin, and a urethane resin on the surface of the foamed resin layer, the raised portion of the uneven pattern is protected. be able to. Thereby, it is possible to provide a resin-impregnated decorative paper and a resin-impregnated decorative board having improved stain resistance and design stability after long-term storage.
  • the resin-impregnated decorative board 1 is formed by heat-press molding a laminate of the resin-impregnated decorative paper 2 and the base material 3, and the resin-impregnated decorative paper 2 is formed. It is a decorative board in which the base material 3 and the base material 3 are integrated. That is, the resin-impregnated decorative board 1 includes a base material 3 and a resin-impregnated decorative paper 2 provided on the surface 3a side of the base material 3.
  • the resin-impregnated decorative board 1 according to the embodiment of the present invention is used, for example, for interior decoration of floors, walls, ceilings, etc.
  • FIG. 1 shows a resin-impregnated decorative plate 1 after heat-pressurization molding
  • FIG. 2 shows a resin-impregnated decorative plate 1 before heat-pressurization molding.
  • the type of the base material 3 is not particularly limited, and any base material can be used depending on the intended use of the resin-impregnated decorative board 1.
  • wood base materials such as single wood board, plywood, laminated material, particle board, medium density fiber board, hard fiber board, and fibrous base material such as paperboard, woven cloth, non-woven fabric, resin impregnated paper, resin impregnated cloth, etc.
  • Inorganic base materials such as gypsum board, slate board, calcium silicate board, slag gypsum board, wood wool cement board, slag cement board, lightweight bubble concrete board, glass fiber reinforced concrete board, steel plate, brass board, aluminum board, duralumin board, Metal base material such as stainless steel plate, acrylic resin plate, styrene resin plate, ABS (Acrylonitrile butadiene styrene) resin plate, polycarbonate resin plate, nylon resin plate, polystyrene resin plate, polypropylene resin plate, polyester resin plate, glass fiber reinforced plastic plate And the like, or two or more kinds of composites or laminates selected from these, etc. can be adopted.
  • Metal base material such as stainless steel plate, acrylic resin plate, styrene resin plate, ABS (Acrylonitrile butadiene styrene) resin plate, polycarbonate resin plate, nylon resin plate, polystyrene resin plate, polypropylene resin plate, polyester resin plate, glass fiber reinforced plastic plate
  • the resin-impregnated decorative paper 2 is formed by impregnating the entire decorative paper 4 with the impregnated resin 5 and then drying the decorative paper 2.
  • the decorative paper 4 includes a base paper 6, a pattern layer 7, a foamed resin layer 8, and a thermosetting resin layer 9.
  • the pattern pattern layer 7 is provided on the surface 6a of the base paper 6.
  • the foamed resin layer 8 is formed by a foaming agent arranged on the surface 7a of the pattern layer 7 or in the pattern layer 7.
  • FIG. 1 shows an example in which the foamed resin layer 8 is formed by a foaming agent arranged on the surface 7a of the pattern layer 7.
  • the thermosetting resin layer 9 is provided on the surface 8a of the foamed resin layer 8.
  • Base paper As the base paper 6, a fibrous sheet-like body such as paper having good water absorption capable of being impregnated with the impregnating resin 5 can be used. For example, thin paper, titanium paper, woodfree paper, bleached or unbleached kraft paper and the like can be adopted. In particular, titanium paper is the most suitable in consideration of both printability and resin impregnation suitability. Further, when utilizing the texture of the surface 3a of the base material 3, it is preferable to use so-called transparent paper having a property of becoming transparent by impregnation with the impregnating resin 5.
  • the thickness of the base paper 6 is not particularly limited, but is preferably in the range of 20 g / m 2 or more and 200 g / m 2 or less in basis weight.
  • the pattern pattern layer 7 is a layer for imparting a design property by a pattern to the resin-impregnated decorative paper 2.
  • the pattern layer 7 is formed by using a printing ink or the like in which a colorant such as a dye or a pigment is dissolved or dispersed in a diluting solvent together with an appropriate binder resin.
  • the type of printing ink is not particularly limited, and may be an oil-based ink or a water-based ink. That is, as the printing ink, a normal printing ink having no liquid repellency can be used. In particular, considering the impregnation suitability of the impregnated resin 5, the water-based ink is the most suitable.
  • the water-based ink has better compatibility with the aqueous solution of the impregnated resin than the oil-based ink. Therefore, when the water-based ink is used, the impregnated resin 5 can be quickly and uniformly impregnated into the decorative paper 4 in the impregnation step at the time of manufacturing the resin-impregnated decorative plate 1, and further, an excellent pattern is excellent due to the integration with the impregnated resin 5. Strength can be exhibited in the pattern layer 7.
  • the type of water-based ink is not particularly limited, but one containing casein or a binder resin containing an emulsion resin as a main component is preferable.
  • Such a binder resin has a property of becoming poorly water-soluble by undergoing a drying step after printing the ink. Therefore, when a binder resin containing such a binder resin is used, the pattern layer 7 is difficult to redissolve in the aqueous solution of the impregnated resin 5 in the resin impregnation step during the production of the resin-impregnated decorative plate 1, and the pattern is retained. It is possible to prevent the impregnated resin 5 from being contaminated.
  • the emulsion resin for example, acrylic type, vinyl acetate type, styrene type, urethane type and the like can be adopted.
  • binder resins include, for example, water-soluble resins such as polyvinyl alcohol and polyacrylamide, and water-soluble polymers such as polysaccharides and cellulose derivatives in order to improve the stability of ink. May be used together.
  • the method for forming the pattern layer 7 is not particularly limited, and any printing method such as a gravure printing method, an offset printing method, a screen printing method, a flexographic printing method, a letterpress printing method, or an inkjet printing method is used. be able to.
  • a solid ink layer for the purpose of coloring the base may be provided between the pattern layer 7 and the base paper 6, and when the solid ink layer is provided, in addition to the above-mentioned various printing methods, for example, as a method for forming the solid ink layer, for example.
  • Roll coating method, gravure coating method, rod coating method, knife coating method, air knife coating method, spray coating method, lip coating method, die coating method and the like can also be used.
  • the type of the pattern formed by the pattern pattern layer 7 is not particularly limited, and any pattern can be used depending on the intended use of the resin-impregnated decorative board 1.
  • any pattern can be used depending on the intended use of the resin-impregnated decorative board 1.
  • a wood grain pattern, a stone grain pattern, a cloth pattern, an abstract pattern, a geometric figure, a character, a symbol, a solid color, etc., or a combination of two or more selected from these can be adopted.
  • the foamed resin layer 8 is a layer for imparting a gloss matte expression and a feeling of touch by the uneven pattern 10 on the surface of the resin-impregnated decorative paper 2.
  • the type of foaming agent is not particularly limited, and any foaming agent can be used.
  • azo-based chemical foaming agents such as azodicarbonamide and azobisformamide
  • hydrazide-based chemical foaming agents such as oxybenzenesulfonyl hydrazide and paratoluenesulfonyl hydrazide
  • microcapsule foaming agents are most suitable.
  • the microcapsule foaming agent has a capsule and a volatile substance encapsulated in the capsule. Then, the microcapsule foaming agent is brought into a foamed state by volatilizing the volatile substance and expanding the capsule.
  • a vinylidene chloride-acrylonitrile copolymer or the like can be used as the material of the capsule.
  • the material of the volatile substance for example, an aliphatic hydrocarbon or the like can be used.
  • the foaming agent preferably has an average particle size before foaming that is 2/3 times or more and 50 times or less the layer thickness of the pattern layer 7. If it is less than 2/3 times the layer thickness of the pattern layer 7, the gloss matte feeling and the touch feeling may be weakened. On the other hand, if the thickness of the pattern layer 7 is larger than 50 times, the foamed resin layer 8 after foaming may fall off from the decorative paper 4 and the scratch resistance may be weakened.
  • the average particle size is the average particle size obtained by microscopic observation.
  • the average particle size obtained by microscopic observation can be obtained, for example, by observing the foaming agent under a microscope, measuring 100 particle sizes of the foaming agent observed under a microscope using image processing software, and averaging the number of measurement results.
  • the average value of the major axis diameter and the minor axis diameter of the particles of the foaming agent can be adopted.
  • the foaming agent preferably has an average particle size of 15 ⁇ m or more and 250 ⁇ m or less after foaming. If it is less than 15 ⁇ m, the gloss matte feeling and the touch feeling may be weakened. On the other hand, if it is larger than 250 ⁇ m, the foamed resin layer 8 after foaming may fall off from the decorative paper 4 and the scratch resistance may be weakened. More preferable is 30 ⁇ m or more and 200 ⁇ m or less.
  • the average particle size of the foaming agent after foaming is the average particle size obtained by microscopic observation, similarly to the average particle size of the foaming agent before foaming. Further, as the particle size of the foaming agent after foaming used for obtaining the average particle size, the average value of the major axis diameter and the minor axis diameter of the voids formed by the foaming of the foaming agent can be adopted.
  • the foaming start temperature of the foaming agent is preferably 100 ° C. or higher and 220 ° C. or lower. If the temperature is lower than 100 ° C., the timing of starting foaming is early, so that the time for heating and pressurizing the foamed resin layer 8 after foaming becomes long, the foamed resin layer 8 after foaming is crushed, and a gloss matte feeling and a feel are felt. May be weakened.
  • the foamed resin layer 8 is not sufficiently foamed by the heat and pressure molding performed by abutting the metal plate (mirror surface plate) during the production of the resin-impregnated decorative plate 1, and the foamed resin layer 8 is not sufficiently foamed, resulting in a gloss matte feeling and a touch.
  • the feeling may be weakened. More preferable is 120 ° C. or higher and 200 ° C. or lower.
  • the type of the concavo-convex pattern 10 formed by the foamed resin layer 8 after foaming is not particularly limited, and may or may not be in sync with the pattern formed by the pattern pattern layer 7. ..
  • the one that is design-synchronized with the pattern formed by the pattern pattern layer 7 is most preferable.
  • the arrangement position of the foamed resin layer 8 is synchronized with the pattern formed by the pattern layer 7. That is, the foamed resin layer 8 is arranged on the portion where the matte texture is desired to be expressed in the pattern formed by the pattern pattern layer 7.
  • the foamed resin layer 8 is arranged on the surface of the pattern pattern layer 7 so as to cover a dark-colored portion having a relatively lower brightness than the other parts of the pattern in the pattern formed by the pattern pattern layer 7. To do.
  • the ratio of the area covered by the foamed resin layer 8 to the area of the dark-colored portion is preferably 70% or more. In particular, 90% or more is most preferable.
  • the pattern of the pattern layer 7 is a wood grain pattern
  • the foamed resin layer 8 is arranged in a conduit pattern that is design-synchronized with the wood grain pattern of the pattern layer 7.
  • the color of the foamed resin layer 8 is not particularly limited, and may be colorless or colored.
  • the foamed resin layer 8 When the foamed resin layer 8 is arranged in the pattern pattern layer 7, the foamed resin layer 8 is relatively brighter than other parts of the pattern in the pattern formed by the pattern pattern layer 7. It is mixed in the low dark color portion and arranged in the pattern pattern layer 7.
  • the ratio of the volume of the foamed resin layer 8 to the total value of the volume of the dark-colored portion and the volume of the foamed resin layer 8 is preferably 70% or more. In particular, 90% or more is most preferable.
  • the method of arranging the foamed resin layer 8 is not particularly limited.
  • a method of printing a printing ink obtained by dispersing the foamed resin layer 8 in a diluting solvent together with an appropriate binder resin on the pattern layer 7. can be adopted.
  • the binder resin for example, a thermosetting resin having a urethane bond such as a two-component curable urethane resin, a curable resin such as an ionizing radiation curable resin, casein, and an emulsion resin as main components can be used. ..
  • thermosetting resin examples include melamine-based resin, epoxy-based resin, urea-based resin, phenol-based resin, unsaturated polyester-based resin, diallyl phthalate-based resin, benzoguanamine-based resin, urethane-based resin, aminoalkyd-based resin, and silicone.
  • a system resin or the like can be used.
  • the ionizing radiation curable resin for example, a (meth) acrylate-based resin, an unsaturated polyester-based resin, or the like can be adopted.
  • the printing method of the printing ink of the foamed resin layer 8 is not particularly limited as in the pattern layer 7, and for example, a gravure printing method, an offset printing method, a screen printing method, a flexo printing method, and a letterpress printing method. Any printing method such as a method or an inkjet printing method can be used.
  • thermosetting resin layer 9 As the thermosetting resin layer 9, a thermosetting resin used in the production of a known resin-impregnated decorative board can be used.
  • a thermosetting resin used in the production of a known resin-impregnated decorative board can be used.
  • epoxy resin, casein resin, acrylic resin, urethane resin, melamine resin, diallyl phthalate resin, benzoguanamine resin, alkyd resin, unsaturated polyester resin, phenol resin, urea resin, etc. Can be adopted.
  • the printing method of the thermosetting resin layer 9 is not particularly limited as in the pattern layer 7, and is, for example, a gravure printing method, an offset printing method, a screen printing method, a flexographic printing method, a letterpress printing method, and an inkjet. Any printing method such as a printing method can be used.
  • the thermosetting resin layer 9 preferably has a thickness of 1 ⁇ m or more and 15 ⁇ m or less. If the thickness of the thermosetting resin layer 9 is less than 1 ⁇ m, the scratch resistance and stain resistance of the resin-impregnated decorative paper 2 may decrease.
  • the thickness of the thermosetting resin layer 9 exceeds 15 ⁇ m, the design property of the resin-impregnated decorative paper 2 and the design stability after long-term storage may deteriorate. More preferable is 5 ⁇ m or more and 10 ⁇ m or less.
  • the thermosetting resin layer 9 is provided in a range of 30% or more of the surface area of the foamed resin layer 8. If the thermosetting resin layer 9 is in the range of less than 30% of the surface area of the foamed resin layer 8, the scratch resistance of the resin-impregnated decorative paper 2 may be lowered. More preferred is 50% or more.
  • the thermosetting resin layer 9 contains colored ink.
  • Vehicles for coloring ink include chlorinated polyethylene such as chlorinated polyethylene and chlorinated polypropylene, polyester, polyurethane composed of isocyanate and polyol, polyacrylic, polyvinyl acetate, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, and cellulose.
  • One type or a mixture of two or more types of a system resin, a polyamide resin, or the like is used, and a pigment, a solvent, various auxiliary agents, or the like is added thereto to form an ink.
  • the pattern layer 7 is provided on the surface 6a of the base paper 6, the foamed resin layer 8 is provided on the surface 7a of the pattern layer 7, and the thermosetting resin layer 9 is provided on the surface 8a of the foamed resin layer 8.
  • the decorative paper 4 is immersed in a water-based impregnating liquid in which the impregnated resin 5 is dissolved or dispersed in water, and the decorative paper 4 is impregnated with the impregnated resin 5.
  • thermosetting resin used in the production of a known resin-impregnated decorative board can be used.
  • melamine-based resin, epoxy-based resin, diallyl phthalate-based resin, benzoguanamine-based resin, urethane-based resin, alkyd-based resin, unsaturated polyester-based resin, phenol-based resin, urea-based resin and the like can be adopted.
  • the impregnation of the impregnating resin 5 may be performed from the front side of the decorative paper 4 on which the pattern layer 7 is formed, or from the opposite side. Further, one side may be impregnated twice, or both sides may be impregnated at the same time.
  • the impregnation rate of the impregnated resin 5 (the ratio of the mass of the impregnated resin to the mass of the decorative paper 4 after impregnation) is preferably 20% or more and 80% or less. In particular, 40% or more and 70% or less is most preferable. Further, in order to obtain the resin-impregnated decorative board 1 having excellent physical properties, it is important to uniformly impregnate the entire base paper 6 with the impregnated resin 5.
  • the resin-impregnated decorative paper 2 is obtained by drying the decorative paper 4 impregnated with the impregnated resin 5. Subsequently, the resin-impregnated decorative paper 2 is placed on the base material 3 (FIG. 2), and a metal plate (mirror surface plate) is placed on the surface of the resin-impregnated decorative paper 2 on which the foamed resin layer 8 and the thermosetting resin layer 9 are formed. ), And heat and pressure molding is performed on the laminate of the resin-impregnated decorative paper 2 and the base material 3, and the resin-impregnated decorative paper 2 and the base material 3 are integrated to obtain the resin-impregnated decorative plate 1. Be done.
  • the foaming agent is foamed by the heat during heat and pressure molding, and the position where the foamed resin layer 8 is arranged rises to form the uneven pattern 10 (FIG. 1). Then, the formed uneven pattern 10 gives the resin-impregnated decorative board 1 a gloss matte feeling and a touch feeling.
  • An adhesive or the like may or may not be interposed between the base material 3 and the resin-impregnated decorative paper 2.
  • a core paper may be interposed in the same manner as in the method adopted for the known melamine resin decorative board.
  • a suitable base paper such as titanium paper, bleached or unbleached kraft paper, and glass fiber non-woven fabric, which is impregnated with an uncured thermosetting resin can be used.
  • thermosetting resin any thermosetting resin can be used depending on the physical characteristics required for the target resin-impregnated decorative board 1.
  • melamine-based resin epoxy-based resin, diallyl phthalate-based resin, benzoguanamine-based resin, urethane-based resin, alkyd-based resin, unsaturated polyester-based resin, phenol-based resin, urea-based resin and the like
  • the core paper include phenol resin impregnated kraft paper, which has been widely used as a core paper for melamine resin decorative boards.
  • a heat and pressure molding method for adhering the resin-impregnated decorative paper 2 in a laminated state on the base material 3 for example, a method of abutting a metal plate and pressing it under flat pressure, a circular pressure type continuous laminating method, or the like is used. be able to.
  • a continuous laminating method using a metal endless belt is preferable. According to the continuous laminating method, it is possible to continuously manufacture a high-quality resin-impregnated decorative plate 1 that has no surface warpage or waviness, has good interlayer adhesion, and is densely cured and integrated.
  • the surface shape of the resin-impregnated decorative plate 1 is the same as the surface shape of the metal plate used in the continuous laminating method, the metal endless belt, the embossed sheet made of the curable resin, or the like. It will be the one that was done. Therefore, as an embossed sheet made of a metal plate, a metal endless belt, a curable resin, etc., a resin having an excellent surface glossiness and smoothness can be used by using a mirror-like or smooth polished surface. An impregnated decorative plate 1 can be obtained.
  • the target resin-impregnated decorative plate 1 can be used. It is also possible to obtain a resin-impregnated decorative plate 1 having an arbitrary surface finish depending on the application.
  • the resin-impregnated decorative board 1 of the present invention is not limited to the embodiment described in detail above, and can be implemented with various modifications as long as the gist of the present invention is not deviated.
  • the resin-impregnated decorative paper 2 is obtained by impregnating the decorative paper 4 with the impregnated resin 5, and the decorative paper 4 includes the base paper 6 and the pattern layer 7.
  • a foamed resin layer 8 and a thermosetting resin layer 9 are provided.
  • the pattern pattern layer 7 is provided on the surface 6a side of the base paper 6.
  • the foamed resin layer 8 was formed by a foaming agent arranged on the surface 7a of the pattern layer 7 or in the pattern layer 7.
  • the thermosetting resin layer 9 contains at least one of an epoxy resin, a casein resin, an acrylic resin, and a urethane resin, and the thermosetting resin layer 9 is provided on the surface 8a of the foamed resin layer 8. It was.
  • the foaming agent can be foamed by heat and pressure molding, and an uneven pattern can be appropriately formed on the surface of the resin-impregnated decorative paper. Further, since it is not necessary to prepare a metal plate for each uneven pattern 10, it is possible to provide the resin-impregnated decorative paper 2 and the resin-impregnated decorative plate 1 having excellent gloss matte expression and touch feeling while suppressing the cost. Further, the resin-impregnated decorative paper 2 and the resin-impregnated decorative plate 1 are provided, in which the raised portion of the uneven pattern 10 can be protected by the thermosetting resin layer 9, and the stain resistance and the design stability after long-term storage are improved. can do.
  • the thickness of the thermosetting resin layer 9 was set to 1 ⁇ m or more and 15 ⁇ m or less. Thereby, it is possible to provide the resin-impregnated decorative paper 2 and the resin-impregnated decorative board 1 in which the deterioration of the design property is suppressed and the durability and the design stability after long-term storage are improved. Further, the thickness of the thermosetting resin layer 9 was set to 5 ⁇ m or more and 10 ⁇ m or less. Thereby, it is possible to provide the resin-impregnated decorative paper 2 and the resin-impregnated decorative board 1 in which the deterioration of the design property is suppressed and the durability and the design stability after long-term storage are further improved.
  • thermosetting resin layer 9 is provided in a range of 30% or more of the surface area of the foamed resin layer 8. Thereby, it is possible to provide the resin-impregnated decorative paper 2 and the resin-impregnated decorative board 1 in which the scratch resistance and the design property are suppressed from being lowered.
  • thermosetting resin layer 9 was provided in a range of 50% or more of the surface area of the foamed resin layer 8. As a result, it is possible to provide the resin-impregnated decorative paper 2 and the resin-impregnated decorative board 1 in which the deterioration of scratch resistance and design is suppressed more effectively. In addition, the thermosetting resin layer 9 contained colored ink. As a result, it is possible to provide the resin-impregnated decorative paper 2 and the resin-impregnated decorative board 1 in which whitening due to the foamed resin layer 8 is suppressed and the design is improved.
  • the foamed resin layer 8 had an average particle size of 15 ⁇ m or more and 250 ⁇ m or less after foaming, and a foaming start temperature of 100 ° C. or more and 220 ° C. or less. Therefore, since the average particle size of the foamed resin layer 8 after foaming and the foaming start temperature are set to appropriate values, the foamed resin layer 8 can be foamed during heat-pressurization molding by the conventional method for manufacturing a resin-impregnated decorative board, and the resin.
  • the uneven pattern 10 can be appropriately formed on the surface of the impregnated decorative plate 1. As a result, the resin-impregnated decorative board 1 can be made to have a gloss matte feeling and a touch feeling.
  • an arbitrary uneven pattern 10 can be imparted to the surface of the resin-impregnated decorative plate 1, and it is not necessary to prepare a metal plate for each uneven pattern 10. Therefore, it is possible to provide the decorative paper 4 capable of forming the resin-impregnated decorative board 1 having excellent gloss matte expression and touch feeling while suppressing the cost.
  • the average particle size of the foamed resin layer 8 after foaming is 15 ⁇ m or more and 250 ⁇ m or less and the foaming start temperature of the foamed resin layer 8 is 100 ° C. or more and 220 ° C. or less, an appropriate uneven pattern 10 can be formed and gloss is obtained. It is possible to provide a decorative paper 4 having excellent matte feeling, touch feeling, and scratch resistance. Further, in the decorative paper 4 according to the embodiment of the present invention, since the pattern formed by the pattern layer 7 and the arrangement position of the foamed resin layer 8 are synchronized, the pattern formed by the pattern layer 7 and the resin-impregnated makeup It is possible to form the resin-impregnated decorative plate 1 in which the uneven pattern 10 on the surface of the plate 1 is tuned in design.
  • the average particle size of the foamed resin layer 8 before foaming is 2/3 times or more and 50 times or less the layer thickness of the pattern pattern layer 7. Therefore, it is possible to provide the resin-impregnated decorative board 1 which can form an appropriate uneven pattern 10 and has excellent gloss matte feeling, touch feeling, and scratch resistance.
  • the resin-impregnated decorative board 1 according to the embodiment of the present invention includes a resin-impregnated decorative paper 2 and a base material 3 integrated with the resin-impregnated decorative paper 2. Therefore, it is possible to provide the resin-impregnated decorative board 1 having excellent gloss matte expression and touch feeling while suppressing the cost.
  • Example 1 First, as the base paper 6, a titanium paper for decorative paper having good water absorption was prepared. Subsequently, a wood grain pattern was printed on the surface 6a of the base paper 6 with a water-based ink containing casein as a main component to form a pattern layer 7 having a layer thickness of 10 ⁇ m. As a printing method, a gravure printing method was used.
  • a conduit pattern that is design-synchronized with the wood grain pattern of the pattern layer 7 is printed on the surface 7a of the pattern layer 7 with a water-based ink containing an epoxy containing a foaming agent as a main component.
  • the foamed resin layer 8 was arranged in a conduit pattern.
  • a printing method a direct gravure printing method was used.
  • the foamed resin layer 8 a layer having an average particle size of 100 ⁇ m before foaming (10 times the layer thickness of the pattern layer 7), an average particle size after foaming of 120 ⁇ m, and a foaming start temperature of 180 ° C. was used.
  • thermosetting resin layer 9 to be the overcoat layer was printed on the surface 8a of the foamed resin layer 8 to form the decorative paper 4.
  • a gravure printing method was used as the printing method, and an epoxy resin was used for the thermosetting resin layer 9.
  • the thickness of the thermosetting resin layer 9 was 0.5 ⁇ m, and the range in which the thermosetting resin layer 9 was provided was 25% of the surface area of the foamed resin layer 8. That is, although there are a plurality of foamed resin layers 8, each of them covers a range of 25% of the surface area with the thermosetting resin layer 9.
  • the decorative paper 4 was impregnated with the impregnated resin 5, and then dried in an oven to form the resin-impregnated decorative paper 2.
  • an aqueous melamine-based resin liquid was used as the impregnating resin 5.
  • the resin-impregnated decorative paper 2 was placed on the base material 3.
  • a particle board base material was used as the base material 3.
  • the surface of the resin-impregnated decorative paper 2 on which the foamed resin layer 8 and the thermosetting resin layer 9 are formed is hot-pressed at about 160 ° C. to heat the laminate of the resin-impregnated decorative paper 2 and the base material 3.
  • the resin-impregnated decorative paper 2 and the base material 3 were integrated by pressure molding to form the resin-impregnated decorative plate 1 of Example 1.
  • a flat plate was used for hot pressing.
  • the region of the pattern layer 7 without the foamed resin layer 8 and the thermosetting resin layer 9 has a gloss finish
  • the region with the foamed resin layer 8 and the thermosetting resin layer 9 has a matte finish. It becomes.
  • Example 2 In Example 2, a casein-based resin was used as the thermosetting resin layer 9. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above. (Example 3) In Example 3, an acrylic resin was used as the thermosetting resin layer 9. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above. (Example 4) In Example 4, a urethane-based resin was used as the thermosetting resin layer 9. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above.
  • Example 5 In Example 5, the thickness of the thermosetting resin layer 9 was set to 1 ⁇ m. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above. (Example 6) In Example 6, the thickness of the thermosetting resin layer 9 was set to 5 ⁇ m. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above. (Example 7) In Example 7, the thickness of the thermosetting resin layer 9 was set to 7 ⁇ m. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above.
  • Example 8 In Example 8, the thickness of the thermosetting resin layer 9 was set to 10 ⁇ m. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above. (Example 9) In Example 9, the thickness of the thermosetting resin layer 9 was set to 15 ⁇ m. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above. (Example 10) In Example 10, the range of the thermosetting resin layer 9 was increased by 5% to 30% of the surface area of the foamed resin layer 8. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above.
  • Example 11 In Example 11, the range of the thermosetting resin layer 9 was increased by 25% to 50% of the surface area of the foamed resin layer 8. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above.
  • Example 12 In Example 12, the range of the thermosetting resin layer 9 was increased by 35% to 60% of the surface area of the foamed resin layer 8. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above.
  • Example 13 In Example 13, the range of the thermosetting resin layer 9 was increased by 55% to 80% of the surface area of the foamed resin layer 8. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above. (Example 14) In Example 14, the range of the thermosetting resin layer 9 was increased by 75% to 100% of the surface area of the foamed resin layer 8. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above.
  • Example 15 In Example 15, a colored ink was added to the thermosetting resin layer 9. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above. (Comparative Example 1) In Comparative Example 1, the thermosetting resin layer 9 was omitted. A resin-impregnated decorative board 1 was produced using the same materials and procedures as in Example 1 except for the above.
  • Design evaluation In the design evaluation, 10 examiners evaluated the sensory test. If there are 7 to 10 people who have a good evaluation, it will be marked as " ⁇ ", if there are 1 to 6 people who have a good evaluation, it will be marked as " ⁇ ", and 0 people will have a good evaluation. In some cases, it was marked as "x”.
  • Long-term environmental test In the long-term environmental test, the resin-impregnated decorative board 1 was left to stand in an environment of a temperature of 40 ° C. and a humidity of 90% for 2 months, and then evaluated by 10 examiners as a sensory test on changes in the design.
  • thermosetting resin layer 9 As shown in Table 1, in the cross-cut test, no peeling was observed in all of Examples 1 to 15 and Comparative Example 1, and there was no problem in adhesion. However, as compared with Comparative Example 1 in which the thermosetting resin layer 9 was omitted, in Examples 1 to 15 in which the thermosetting resin layer 9 was provided, stain resistance and design stability after long-term storage were improved. In particular, as shown by the evaluation results of Examples 1 to 4, those using an epoxy resin, a casein resin, an acrylic resin, or a urethane resin as the thermosetting resin layer 9 have stain resistance and after long-term storage. There was no problem or excellent design stability.
  • thermosetting resin layer 9 the thicker the thermosetting resin layer 9 is, the more the scratch resistance is improved, but the designability tends to be lowered.
  • evaluation results of Examples 10 to 14 show, as the coating area of the thermosetting resin layer 9 is increased, the stain resistance is improved, but the design property tends to be lowered.
  • Example 15 by adding the colored ink to the thermosetting resin layer 9, not only the degree of freedom of design expression is improved, but also the whitening of the foamed resin layer 8 can be suppressed, and the design can be suppressed. The sex has improved.
  • the resin-impregnated decorative board 1 of Examples 6, 7, 12, and 15 was particularly excellent.
  • thermosetting resin layer 9 an epoxy resin is used as the thermosetting resin layer 9, but even if a casein resin, an acrylic resin, a urethane resin, or the like is used instead of the epoxy resin, it is basic. There is no big difference in physical properties, and almost the same results can be obtained.

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Abstract

化粧紙（４）に含浸樹脂（５）を含浸させた樹脂含浸化粧紙（２）である。化粧紙（４）は、原紙（６）と、原紙（６）の表面（６ａ）側に設けた絵柄模様層（７）と、絵柄模様層（７）の表面（７ａ）上、又は絵柄模様層（７）中に配置された発泡剤によって形成された発泡樹脂層（８）と、発泡樹脂層（８）の表面（８ａ）上に設けた熱硬化性樹脂層（９）と、を備える。熱硬化性樹脂層（９）は、エポキシ系樹脂、カゼイン系樹脂、アクリル系樹脂、ウレタン系樹脂の少なくとも一つを含む。

Description

樹脂含浸化粧紙、及び樹脂含浸化粧板
　本発明は、樹脂含浸化粧紙、及び樹脂含浸化粧板に関する。
　従来、熱硬化性樹脂が含浸された樹脂含浸化粧紙と、基材との積層体に、金属板を当接して加熱加圧成型を行って、樹脂含浸化粧紙と基材とが一体化された樹脂含浸化粧板を得る、樹脂含浸化粧板の製造方法が提案されている（例えば、特許文献１参照。）。特許文献１に記載の樹脂含浸化粧板の製造方法では、金属板にエンボス形状を設けて、樹脂含浸化粧板の表面に凹凸模様を付与して、手触り感を付与するようになっている。また、エンボス形状の粗密度合を調整して、グロスマット表現を付与することもできる。
　しかしながら、特許文献１に記載の樹脂含浸化粧板の製造方法では、付与しようとする凹凸模様毎に金属板を用意する必要があり、コストが増大する可能性がある。そのため、発泡樹脂層を設けることで凹凸模様を付与することが考えられる。しかしながら、凹凸模様の盛り上げ部が保護されていないと、耐汚染性及び長期保管後の意匠安定性が低下する可能性がある。
特開平０９－２６２９５６号公報
　本発明は、上記の問題点に着目してなされたもので、コストを抑えつつグロスマット表現及び手触り感に優れ、且つ耐汚染性及び長期保管後の意匠安定性を向上させた樹脂含浸化粧紙及び樹脂含浸化粧板を提供することを目的とする。
　本発明の一態様に係る樹脂含浸化粧紙は、化粧紙に含浸樹脂を含浸させた樹脂含浸化粧紙であって、化粧紙は、原紙と、原紙の表面側に設けた絵柄模様層と、絵柄模様層の表面上、又は絵柄模様層中に配置された発泡剤によって形成された発泡樹脂層と、発泡樹脂層の表面上に設けた熱硬化性樹脂層と、を備え、熱硬化性樹脂層は、エポキシ系樹脂、カゼイン系樹脂、アクリル系樹脂、ウレタン系樹脂の少なくとも一つを含む。
　本発明の他の態様に係る樹脂含浸化粧板は、樹脂含浸化粧紙と、樹脂含浸化粧紙に一体化された基材と、を備える。
　本発明によれば、加熱加圧成型によって発泡剤を発泡でき、樹脂含浸化粧紙の表面に凹凸模様を適切に形成できる。凹凸模様毎の金属板を用意する必要がないため、コストを抑えつつ、グロスマット表現及び手触り感に優れた樹脂含浸化粧紙及び樹脂含浸化粧板を提供することができる。また、発泡樹脂層の表面上に、エポキシ系樹脂、カゼイン系樹脂、アクリル系樹脂、ウレタン系樹脂の少なくとも一つを含む熱硬化性樹脂層を設けたことで、凹凸模様の盛り上げ部を保護することができる。これにより、耐汚染性及び長期保管後の意匠安定性を向上させた樹脂含浸化粧紙及び樹脂含浸化粧板を提供することができる。
加熱加圧成型後の樹脂含浸化粧板を表す断面図である。 加熱加圧成型前の樹脂含浸化粧板を表す断面図である。
　以下、本発明の実施形態に係る化粧紙、樹脂含浸化粧紙及び樹脂含浸化粧板について、図面を参照しつつ説明する。本発明は、以下に記載する実施形態に限定されるものではなく、当業者の知識を基に設計の変更等の変形を加えることも可能であり、そのような変形が加えられた実施形態も、本発明の範囲に含まれるものである。また、各図面は、理解を容易にするため適宜誇張して表現している。
（構成）
　図１及び図２に示すように、本発明の実施形態に係る樹脂含浸化粧板１は、樹脂含浸化粧紙２と基材３との積層体に加熱加圧成型を行い、樹脂含浸化粧紙２と基材３とを一体化させてなる化粧板である。すなわち、樹脂含浸化粧板１は、基材３と、基材３の表面３ａ側に設けられた樹脂含浸化粧紙２と、を備えている。本発明の実施形態に係る樹脂含浸化粧板１は、例えば、建築物の床面、壁面、天井等の内装、家具、各種キャビネット等の表面装飾材料、建具の表面化粧、車両内装等に用いられる樹脂含浸化粧板である。図１は、加熱加圧成型後の樹脂含浸化粧板１を示し、図２は、加熱加圧成型前の樹脂含浸化粧板１を示す。
（基材）
　基材３の種類は、特に制限されるものではなく、目的とする樹脂含浸化粧板１の用途に応じて、任意の基材を用いることができる。例えば、木材単板、合板、集成材、パーティクルボード、中密度繊維板、硬質繊維板等の木質基材や、板紙、織布、不織布、樹脂含浸紙、樹脂含浸布等の繊維質基材、石膏ボード、スレート板、珪酸カルシウム板、スラグ石膏板、木毛セメント板、スラグセメント板、軽量気泡コンクリート板、ガラス繊維強化コンクリート板等の無機質基材、鋼板、真鍮板、アルミニウム板、ジュラルミン板、ステンレス板等の金属基材、アクリル樹脂板、スチロール樹脂板、ＡＢＳ(Acrylonitrile butadiene styrene)樹脂板、ポリカーボネート樹脂板、ナイロン樹脂板、ポリスチレン樹脂板、ポリプロピレン樹脂板、ポリエステル樹脂板、ガラス繊維強化プラスチック板等の合成樹脂基材等或いはこれらから選ばれる２種以上の複合体又は積層体等を採用できる。
（樹脂含浸化粧紙）
　本発明の実施形態に係る樹脂含浸化粧紙２は、化粧紙４の全体に含浸樹脂５を含浸させた後、乾燥させて形成されている。化粧紙４は、原紙６と、絵柄模様層７と、発泡樹脂層８と、熱硬化性樹脂層９と、を備える。絵柄模様層７は、原紙６の表面６ａ上に設けられている。発泡樹脂層８は、絵柄模様層７の表面７ａ上、又は絵柄模様層７中に配置された発泡剤によって形成されている。図１では、絵柄模様層７の表面７ａ上に配置された発泡剤によって発泡樹脂層８を形成した例を示している。熱硬化性樹脂層９は、発泡樹脂層８の表面８ａ上に設けられている。
（原紙）
　原紙６としては、含浸樹脂５の含浸が可能な吸水性のよい紙等の繊維質シート状体を用いることができる。例えば、薄葉紙、チタン紙、上質紙、晒又は未晒クラフト紙等を採用できる。特に、印刷適性と樹脂含浸適性との両面を考慮すると、チタン紙が最も好適である。また、基材３の表面３ａの質感を活かす場合には、含浸樹脂５の含浸により透明化する性質を有する、所謂透明紙を用いることが好ましい。原紙６の厚さは、特に制限されるものではないが、坪量２０ｇ／ｍ２以上２００ｇ／ｍ２以下の範囲が好ましい。
（絵柄模様層）
　絵柄模様層７は、樹脂含浸化粧紙２に絵柄模様による意匠性を付与するための層である。絵柄模様層７は、染料又は顔料等の着色剤を適当なバインダー樹脂とともに希釈溶媒中に溶解又は分散してなる印刷インキ等を用いて形成される。印刷インキの種類は、特に制限されるものではなく、油性インキでもよいし、水性インキであってもよい。すなわち、印刷インキとしては、撥液性を有しない、通常の印刷インキを用いることができる。
　特に、含浸樹脂５の含浸適性を考慮すると、水性インキが最も好適である。水性インキは、油性インキと比較して、含浸樹脂の水溶液との馴染みがよい。それゆえ、水性インキを用いた場合、樹脂含浸化粧板１製造時の含浸工程において、化粧紙４に含浸樹脂５を迅速且つ均一に含浸でき、さらに、含浸樹脂５との一体化によって優れた絵柄模様層７に強度を発現できる。また、水性インキの種類は、特に制限されるものではないが、カゼイン、エマルジョン樹脂を主成分とするバインダー樹脂を含むものが好ましい。
　このようなバインダー樹脂は、インキの印刷後に乾燥工程を経ることによって、難水溶化する性質を有している。それゆえ、このようなバインダー樹脂を含むバインダー樹脂を用いた場合、樹脂含浸化粧板１製造時の樹脂含浸工程において、含浸樹脂５の水溶液に絵柄模様層７が再溶解し難く、絵柄模様を保持でき、さらに含浸樹脂５の汚染を防止できる。
　エマルジョン樹脂としては、例えば、アクリル系、酢酸ビニル系、スチレン系、ウレタン系等を採用できる。また、バインダー樹脂には、カゼイン、エマルジョン樹脂の他に、インキの安定性を向上させるために、例えば、ポリビニルアルコール、ポリアクリルアミド等の水溶性樹脂や多糖類、セルロース誘導体等の水溶性高分子等を併用してもよい。
　絵柄模様層７の形成方法は、特に制限されるものではなく、例えば、グラビア印刷法、オフセット印刷法、スクリーン印刷法、フレキソ印刷法、凸版印刷法、インクジェット印刷法等、任意の印刷方法を用いることができる。また絵柄模様層７と原紙６との層間に、下地着色を目的としたベタインキ層を設けてもよく、ベタインキ層を設ける場合には、ベタインキ層の形成方法として、上記各種印刷方法の他、例えば、ロールコート法、グラビアコート法、ロッドコート法、ナイフコート法、エアーナイフコート法、スプレーコート法、リップコート法、ダイコート法等、任意のコーティング方法を用いることもできる。
　絵柄模様層７が形成する絵柄の種類は、特に制限されるものではなく、目的とする樹脂含浸化粧板１の用途に応じて、任意の絵柄を用いることができる。例えば、木目柄、石目柄、布目柄、抽象柄、幾何学図形、文字、記号、単色無地等、或いはこれらから選ばれる２種以上の組み合わせ等を採用できる。
（発泡樹脂層）
　発泡樹脂層８は、樹脂含浸化粧紙２の表面の凹凸模様１０によるグロスマット表現及び手触り感を付与するための層である。発泡剤の種類は、特に制限されるものではなく、任意の発泡剤を用いることができる。例えば、アゾジカルボンアミド、アゾビスホルムアミド等のアゾ系、オキシベンゼンスルホニルヒドラジド、パラトルエンスルホニルヒドラジド等のヒドラジド系等の熱分解型の化学発泡剤、マイクロカプセル発泡剤等を採用できる。
　特に、マイクロカプセル発泡剤が最も好適である。マイクロカプセル発泡剤は、カプセルと、カプセルに封入された揮発物質とを有している。そして、マイクロカプセル発泡剤は、揮発物質が揮発してカプセルを膨張させることで、発泡状態となる。カプセルの材料としては、例えば、塩化ビニリデンーアクリルニトリル共重合体等を用いることができる。また、揮発物質の材料としては、例えば、脂肪族炭化水素等を用いることができる。
　発泡剤としては、発泡前の平均粒径が絵柄模様層７の層厚の２／３倍以上５０倍以下であるものが好ましい。絵柄模様層７の層厚の２／３倍未満であると、グロスマット感や手触り感が弱くなる可能性がある。一方、絵柄模様層７の層厚の５０倍より大きくなると、発泡後の発泡樹脂層８が化粧紙４から脱落等して耐傷付性が弱くなる可能性がある。ここで、平均粒径は、顕微鏡観察による平均粒径である。顕微鏡観察による平均粒径は、例えば、発泡剤を顕微鏡観察して、画像処理ソフト等により、顕微鏡観察した発泡剤の粒径を１００個測定し、測定結果を個数平均することにより得られる。なお、発泡剤の粒径としては、発泡剤の粒子の長軸径と短軸径との平均値を採用できる。
　発泡剤としては、発泡後の平均粒径が１５μｍ以上２５０μｍ以下となるものが好ましい。１５μｍ未満であると、グロスマット感や手触り感が弱くなる可能性がある。一方、２５０μｍより大きくなると発泡後の発泡樹脂層８が化粧紙４から脱落等して耐傷付性が弱くなる可能性がある。より好適なのは３０μｍ以上２００μｍ以下である。ここで、発泡後の発泡剤の平均粒径は、発泡前の発泡剤の平均粒径と同様に、顕微鏡観察による平均粒径である。また、平均粒径の取得に用いられる、発泡後の発泡剤の粒径としては、発泡剤の発泡によって形成された空隙の長軸径と短軸径との平均値を採用することができる。
　また、発泡剤の発泡開始温度は、１００℃以上２２０℃以下が好ましい。１００℃未満であると、発泡開始のタイミングが早いため、発泡後の発泡樹脂層８が加熱加圧される時間が長くなり、発泡後の発泡樹脂層８が潰され、グロスマット感や手触り感が弱くなる可能性がある。一方、２２０℃より高くなると、樹脂含浸化粧板１の製造時に金属板（鏡面板）を当接して行われる加熱加圧成型で、発泡樹脂層８が十分に発泡されず、グロスマット感や手触り感が弱くなる可能性がある。より好適なのは、１２０℃以上２００℃以下である。
　発泡後の発泡樹脂層８が形成する凹凸模様１０の種類は、特に制限されるものではなく、絵柄模様層７が形成する絵柄と意匠的に同調するものでもよいし、非同調のものでもよい。特に、意匠性に優れた樹脂含浸化粧板１を得ることを考慮すると、絵柄模様層７が形成する絵柄と意匠的に同調するものが最も好適である。絵柄模様層７が形成する絵柄と凹凸模様１０とを意匠的に同調させる場合、発泡樹脂層８の配置位置を、絵柄模様層７が形成する絵柄と同調させる。すなわち、絵柄模様層７が形成する絵柄の中で、艶消状の質感を表現したい箇所の上に発泡樹脂層８を配置する。例えば、発泡樹脂層８は、絵柄模様層７が形成する絵柄の中で、その絵柄の他の部分よりも相対的に明度の低い暗色部分を覆うように、絵柄模様層７の表面上に配置する。暗色部分の面積に占める発泡樹脂層８で覆われた面積の比率は、７０％以上が好ましい。特に、９０％以上が最も好適である。絵柄模様層７の絵柄を木目模様とする場合には、絵柄模様層７の木目模様と意匠的に同調した導管模様状に、発泡樹脂層８を配置する。発泡樹脂層８の色は、特に限定されるものではなく、無色でもよく、有色でもよい。
　なお、発泡樹脂層８を、絵柄模様層７中に配置する場合には、発泡樹脂層８は、絵柄模様層７が形成する絵柄の中で、その絵柄の他の部分よりも相対的に明度の低い暗色部分に混入して、絵柄模様層７中に配置する。暗色部分の体積と発泡樹脂層８の体積との合計値に占める発泡樹脂層８の体積の比率は、７０％以上が好ましい。特に、９０％以上が最も好適である。
　発泡樹脂層８の配置方法は、特に制限されるものではなく、例えば、発泡樹脂層８を適当なバインダー樹脂とともに希釈溶媒中に分散してなる印刷インキを絵柄模様層７上に印刷する方法を採用できる。バインダー樹脂としては、例えば、二液硬化型ウレタン樹脂等のウレタン結合を持つ熱硬化型樹脂、電離放射線硬化性樹脂等の硬化性樹脂、カゼイン、エマルジョン樹脂を主成分とするものを用いることができる。熱硬化型樹脂としては、例えば、メラミン系樹脂、エポキシ系樹脂、尿素系樹脂、フェノール系樹脂、不飽和ポリエステル系樹脂、ジアリルフタレート系樹脂、ベンゾグアナミン系樹脂、ウレタン系樹脂、アミノアルキド系樹脂、シリコーン系樹脂等を採用できる。また、電離放射線硬化性樹脂としては、例えば、（メタ）アクリレート系樹脂、不飽和ポリエステル系樹脂等を採用できる。
　また、発泡樹脂層８の印刷インキの印刷方法は、絵柄模様層７と同様に、特に制限されるものではなく、例えば、グラビア印刷法、オフセット印刷法、スクリーン印刷法、フレキソ印刷法、凸版印刷法、インクジェット印刷法等、任意の印刷方法を用いることができる。
（熱硬化性樹脂層）
　熱硬化性樹脂層９としては、公知の樹脂含浸化粧板の製造時に使用される熱硬化性樹脂を用いることができる。例えば、エポキシ系樹脂、カゼイン系樹脂、アクリル系樹脂、ウレタン系樹脂、メラミン系樹脂、ジアリルフタレート系樹脂、ベンゾグアナミン系樹脂、アルキド系樹脂、不飽和ポリエステル系樹脂、フェノール系樹脂、尿素系樹脂等を採用できる。特に、エポキシ系樹脂、カゼイン系樹脂、アクリル系樹脂、ウレタン系樹脂の少なくとも一つを含むことが好ましい。
　熱硬化性樹脂層９の印刷方法は、絵柄模様層７と同様に、特に制限されるものではなく、例えば、グラビア印刷法、オフセット印刷法、スクリーン印刷法、フレキソ印刷法、凸版印刷法、インクジェット印刷法等、任意の印刷方法を用いることができる。
　熱硬化性樹脂層９は、厚さが１μｍ以上１５μｍ以下であることが好ましい。熱硬化性樹脂層９の厚さが１μｍ未満であると、樹脂含浸化粧紙２の耐傷付性及び耐汚染性が低下する可能性がある。一方、熱硬化性樹脂層９の厚さが１５μｍを超えると、樹脂含浸化粧紙２の意匠性及び長期保管後の意匠安定性が低下する可能性がある。より好適なのは、５μｍ以上１０μｍ以下である。
　熱硬化性樹脂層９は、発泡樹脂層８の表面積のうち３０％以上の範囲に設けられる。熱硬化性樹脂層９が発泡樹脂層８の表面積のうち３０％未満の範囲であると、樹脂含浸化粧紙２の耐傷付性が低下する可能性がある。より好適なのは、５０％以上である。
　熱硬化性樹脂層９は、着色インキを含有する。着色インキのビヒクルとしては、塩素化ポリエチレン、塩素化ポリプロピレン等の塩素化ポリオレフィン、ポリエステル、イソシアネートとポリオールからなるポリウレタン、ポリアクリル、ポリ酢酸ビニル、ポリ塩化ビニル、塩化ビニル－酢酸ビニル共重合体、セルロース系樹脂、ポリアミド系樹脂等を一種又は二種以上混合して用い、これに顔料、溶剤、各種補助剤等を加えてインキ化したものが使用できる。
（樹脂含浸化粧板の製造方法）
　次に、本発明の実施形態に係る樹脂含浸化粧板１の製造方法について説明する。
　まず、原紙６の表面６ａ上に絵柄模様層７を設け、絵柄模様層７の表面７ａ上に発泡樹脂層８を設け、発泡樹脂層８の表面８ａ上に熱硬化性樹脂層９を設けることで化粧紙４を形成する。そして、含浸樹脂５を水に溶解又は分散させた水系含浸液に化粧紙４を浸漬し、化粧紙４に含浸樹脂５を含浸させる。
　含浸樹脂５としては、公知の樹脂含浸化粧板の製造時に使用される熱硬化性樹脂を用いることができる。例えば、メラミン系樹脂、エポキシ系樹脂、ジアリルフタレート系樹脂、ベンゾグアナミン系樹脂、ウレタン系樹脂、アルキド系樹脂、不飽和ポリエステル系樹脂、フェノール系樹脂、尿素系樹脂等を採用できる。含浸樹脂５の含浸は、化粧紙４の、絵柄模様層７が形成されている表面側から行ってもよいし、反対面側から行ってもよい。また、片面ずつ２回に分けて含浸させたり、両面を同時に含浸させたりしてもよい。含浸樹脂５の含浸率（含浸後の化粧紙４の質量に占める含浸樹脂の質量の比率）は、２０％以上８０％以下が好ましい。特に、４０％以上７０％以下が最も好適である。また、物性に優れた樹脂含浸化粧板１を得るためには、原紙６の全体に均一に含浸樹脂５を含浸させることが重要である。
　続いて、含浸樹脂５が含浸された化粧紙４を乾燥させることで樹脂含浸化粧紙２が得られる。続いて、樹脂含浸化粧紙２を基材３上に載置し（図２）、樹脂含浸化粧紙２における発泡樹脂層８及び熱硬化性樹脂層９が形成された面に金属板（鏡面板）を当接して、樹脂含浸化粧紙２と基材３との積層体に加熱加圧成型を行い、樹脂含浸化粧紙２と基材３とを一体化させて、樹脂含浸化粧板１が得られる。その際、加熱加圧成型時の熱によって発泡剤が発泡し、発泡樹脂層８が配置された位置が盛り上がり凹凸模様１０が形成される（図１）。そして、形成された凹凸模様１０により、樹脂含浸化粧板１にグロスマット感や手触り感が発現される。
　なお、基材３と樹脂含浸化粧紙２との間には、接着剤等を介在させてもよいし、接着剤等を介在させなくてもよい。また、必要に応じて、公知のメラミン樹脂化粧板に採用されている方法と同様に、コア紙を介在させてもよい。コア紙としては、例えば、チタン紙、晒又は未晒クラフト紙、ガラス繊維不織布等の適宜の原紙に、未硬化状態の熱硬化性樹脂が含浸されているものを用いることができる。また、熱硬化性樹脂は、目的とする樹脂含浸化粧板１に要求される物性等に応じて、任意の熱硬化性樹脂を用いることができる。例えば、メラミン系樹脂、エポキシ系樹脂、ジアリルフタレート系樹脂、ベンゾグアナミン系樹脂、ウレタン系樹脂、アルキド系樹脂、不飽和ポリエステル系樹脂、フェノール系樹脂、尿素系樹脂等を採用できる。コア紙の例としては、従来よりメラミン樹脂化粧板用のコア紙として広く採用されている、フェノール樹脂含浸クラフト紙が挙げられる。
　樹脂含浸化粧紙２を基材３上に積層した状態で接着するための加熱加圧成型方法としては、例えば、金属板を当接して平圧プレスする方法、円圧式の連続ラミネート方式等を用いることができる。特に、金属製無端ベルトを使用した連続ラミネート方式が好ましい。連続ラミネート方式によれば、表面の反りや波打ち等がなく、しかも層間密着性がよく、稠密に硬化一体化された高品質の樹脂含浸化粧板１を高速度で連続的に製造できる。
　連続ラミネート方式を用いた場合、樹脂含浸化粧板１の表面形状は、連続ラミネート方式で使用される金属板や金属製無端ベルト、硬化型樹脂等で作製されたエンボスシートの表面形状がそのまま賦形されたものとなる。それゆえ、金属板や金属製無端ベルト、硬化型樹脂等で作製されたエンボスシートとして、表面を鏡面状等の平滑に研磨したものを用いることで、表面の光沢度や平滑性に優れた樹脂含浸化粧板１を得ることができる。
　勿論、必要に応じて、所望の任意の艶消状やテクスチャー状の金属板や金属製無端ベルト、硬化型樹脂等で作製されたエンボスシートを用いることで、目的とする樹脂含浸化粧板１の用途に応じて任意の表面仕上げ状態の樹脂含浸化粧板１を得ることも可能である。
　本発明の樹脂含浸化粧板１は、以上に詳述した実施の形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において、種々の変形を加えて実施することができる。
　以上説明したように、本発明の実施形態に係る樹脂含浸化粧紙２は、化粧紙４に含浸樹脂５を含浸させたものであって、化粧紙４は、原紙６と、絵柄模様層７と、発泡樹脂層８と、熱硬化性樹脂層９と、を備える。絵柄模様層７は、原紙６の表面６ａ側に設けた。発泡樹脂層８は、絵柄模様層７の表面７ａ上、又は絵柄模様層７中に配置された発泡剤によって形成した。熱硬化性樹脂層９は、エポキシ系樹脂、カゼイン系樹脂、アクリル系樹脂、ウレタン系樹脂の少なくとも一つを含んでおり、この熱硬化性樹脂層９を発泡樹脂層８の表面８ａ上に設けた。これにより、加熱加圧成型によって発泡剤を発泡でき、樹脂含浸化粧紙の表面に凹凸模様を適切に形成できる。また、凹凸模様１０毎の金属板を用意する必要がないため、コストを抑えつつ、グロスマット表現及び手触り感に優れた樹脂含浸化粧紙２及び樹脂含浸化粧板１を提供することができる。また、熱硬化性樹脂層９によって凹凸模様１０の盛り上げ部を保護することができ、耐汚染性及び長期保管後の意匠安定性を向上させた樹脂含浸化粧紙２及び樹脂含浸化粧板１を提供することができる。
　また、熱硬化性樹脂層９の厚さを１μｍ以上１５μｍ以下にした。これにより、意匠性が悪くなることを抑制し、耐久性及び長期保管後の意匠安定性を向上させた樹脂含浸化粧紙２及び樹脂含浸化粧板１を提供することができる。
　また、熱硬化性樹脂層９の厚さを５μｍ以上１０μｍ以下にした。これにより、意匠性が悪くなることを抑制し、耐久性及び長期保管後の意匠安定性をさらに向上させた樹脂含浸化粧紙２及び樹脂含浸化粧板１を提供することができる。
　また、熱硬化性樹脂層９を発泡樹脂層８の表面積のうち３０％以上の範囲に設けた。これにより、耐傷付性及び意匠性が低下することを抑制した樹脂含浸化粧紙２及び樹脂含浸化粧板１を提供することができる。
　また、熱硬化性樹脂層９を発泡樹脂層８の表面積のうち５０％以上の範囲に設けた。これにより、耐傷付性及び意匠性が低下することを、より効果的に抑制した樹脂含浸化粧紙２及び樹脂含浸化粧板１を提供することができる。
　また、熱硬化性樹脂層９に着色インキを含有させた。これにより、発泡樹脂層８による白化を抑制し、意匠性を向上させた樹脂含浸化粧紙２及び樹脂含浸化粧板１を提供することができる。
　そして、発泡樹脂層８は、発泡後の平均粒径が１５μｍ以上２５０μｍ以下とし、発泡開始温度が１００℃以上２２０℃以下とした。それゆえ、発泡樹脂層８の発泡後の平均粒径や発泡開始温度を適切な数値としたため、従来の樹脂含浸化粧板の製造方法により、加熱加圧成型時に発泡樹脂層８を発泡でき、樹脂含浸化粧板１の表面に凹凸模様１０を適切に形成できる。これにより、樹脂含浸化粧板１にグロスマット感や手触り感を発現できる。また化粧紙４における発泡樹脂層８の配置位置を調整することで、樹脂含浸化粧板１の表面に任意の凹凸模様１０を付与でき、凹凸模様１０毎の金属板を用意する必要がない。そのため、コストを抑えつつ、グロスマット表現及び手触り感に優れた樹脂含浸化粧板１を形成可能な化粧紙４を提供できる。
　また、発泡樹脂層８の発泡後の平均粒径が１５μｍ以上２５０μｍ以下であり、発泡樹脂層８の発泡開始温度が１００℃以上２２０℃以下であるため、適切な凹凸模様１０を形成でき、グロスマット感、手触り感、耐傷付性に優れた化粧紙４を提供できる。
　さらに、本発明の実施形態に係る化粧紙４は、絵柄模様層７が形成する絵柄と発泡樹脂層８の配置位置とが同調しているため、絵柄模様層７が形成する絵柄と樹脂含浸化粧板１の表面の凹凸模様１０とが意匠的に同調した樹脂含浸化粧板１を形成できる。
　また、本発明の実施形態に係る化粧紙４は、発泡樹脂層８が発泡前の平均粒径が絵柄模様層７の層厚の２／３倍以上５０倍以下である。それゆえ、適切な凹凸模様１０を形成でき、グロスマット感、手触り感、耐傷付性に優れた樹脂含浸化粧板１を提供できる。
　また、本発明の実施形態に係る樹脂含浸化粧板１は、樹脂含浸化粧紙２と、樹脂含浸化粧紙２に一体化された基材３とを備えるようにした。そのため、コストを抑えつつ、グロスマット表現及び手触り感に優れた樹脂含浸化粧板１を提供することができる。
　以下に、本発明に係る樹脂含浸化粧板１の実施例及び比較例について説明する。なお、本発明は、下記の実施例に限定されるものではない。
（実施例１）
　まず、原紙６として、吸水性のよい化粧紙用のチタン紙を用意した。続いて、原紙６の表面６ａに、カゼインを主成分とした水性インキで木目模様を印刷し、層厚１０μｍの絵柄模様層７を形成した。印刷方法としては、グラビア印刷方式を用いた。続いて、インラインで、絵柄模様層７の表面７ａに、発泡剤を含有したエポキシを主成分とした水性インキで、絵柄模様層７の木目模様と意匠的に同調した導管模様を印刷して、導管模様状に発泡樹脂層８を配置した。印刷方法としては、ダイレクトグラビア印刷方式を用いた。発泡樹脂層８としては、発泡前の平均粒径が１００μｍ（絵柄模様層７の層厚の１０倍）、発泡後の平均粒径が１２０μｍ、発泡開始温度が１８０℃となるものを用いた。
　続いて、発泡樹脂層８の表面８ａにオーバーコート層となる熱硬化性樹脂層９を印刷し、化粧紙４を形成した。印刷方法としては、グラビア印刷方式を用い、熱硬化性樹脂層９には、エポキシ系樹脂を用いた。熱硬化性樹脂層９の厚さは０.５μｍとし、熱硬化性樹脂層９を設ける範囲は、発泡樹脂層８の表面積のうち２５％とした。すなわち、発泡樹脂層８は複数あるが、その全てにおいて、夫々、表面積の２５％の範囲を熱硬化性樹脂層９で覆う。続いて、化粧紙４に含浸樹脂５を含浸させた後、オーブンにて乾燥させて、樹脂含浸化粧紙２を形成した。含浸樹脂５としては、水性メラミン系樹脂液を用いた。続いて、樹脂含浸化粧紙２を基材３上に載置した。基材３としては、パーティクルボード基材を用いた。続いて、樹脂含浸化粧紙２における発泡樹脂層８及び熱硬化性樹脂層９が形成された面に約１６０℃の熱プレスを行ない、樹脂含浸化粧紙２と基材３との積層体に加熱加圧成型を行い、樹脂含浸化粧紙２と基材３とを一体化させて、実施例１の樹脂含浸化粧板１を形成した。熱プレス時のプレートは、フラットのものを使用した。樹脂含浸化粧板１では、絵柄模様層７のうち、発泡樹脂層８及び熱硬化性樹脂層９のない領域がグロス仕上げとなり、発泡樹脂層８及び熱硬化性樹脂層９のある領域がマット仕上げとなる。
（実施例２）
　実施例２では、熱硬化性樹脂層９として、カゼイン系樹脂を用いた。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（実施例３）
　実施例３では、熱硬化性樹脂層９として、アクリル系樹脂を用いた。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（実施例４）
　実施例４では、熱硬化性樹脂層９として、ウレタン系樹脂を用いた。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（実施例５）
　実施例５では、熱硬化性樹脂層９の厚さを１μｍとした。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（実施例６）
　実施例６では、熱硬化性樹脂層９の厚さを５μｍとした。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（実施例７）
　実施例７では、熱硬化性樹脂層９の厚さを７μｍとした。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（実施例８）
　実施例８では、熱硬化性樹脂層９の厚さを１０μｍとした。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（実施例９）
　実施例９では、熱硬化性樹脂層９の厚さを１５μｍとした。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（実施例１０）
　実施例１０では、熱硬化性樹脂層９の範囲を５％増加させ、発泡樹脂層８の表面積の３０％とした。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（実施例１１）
　実施例１１では、熱硬化性樹脂層９の範囲を２５％増加させ、発泡樹脂層８の表面積の５０％とした。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（実施例１２）
　実施例１２では、熱硬化性樹脂層９の範囲を３５％増加させ、発泡樹脂層８の表面積の６０％とした。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（実施例１３）
　実施例１３では、熱硬化性樹脂層９の範囲を５５％増加させ、発泡樹脂層８の表面積の８０％とした。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（実施例１４）
　実施例１４では、熱硬化性樹脂層９の範囲を７５％増加させ、発泡樹脂層８の表面積の１００％とした。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（実施例１５）
　実施例１５では、熱硬化性樹脂層９に着色インキを加えた。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（比較例１）
　比較例１では、熱硬化性樹脂層９を省略した。それ以外は、実施例１と同じ材料・手順で、樹脂含浸化粧板１を作製した。
（性能評価）
　実施例１～１５、比較例１の樹脂含浸化粧板１に対し、以下に示す性能評価を行なった。
（クロスカット試験）
　クロスカット試験では、樹脂含浸化粧板１にカッターにてクロスカットを入れ、剥離が起きるか否かを評価する。クロスカット時に著しい剥離がない場合を「○」とし、著しい剥離がある場合を「×」とする。
（汚染試験）
　汚染試験では、樹脂含浸化粧板１に黒クレヨン及び赤インキを被覆させ、１時間後にアルコールで拭き取り、拭き取り残し度合を評価した。拭き取り残り度合が３０％未満である場合を「○」とし、拭き取り残し度合が３０％以上７０％未満である場合を「△」とし、拭き取り残し度合が７０％以上である場合を「×」とした。
（触感評価）
　触感評価では、官能試験として１０人の試験員で評価を行なった。評価が良いとした人が７～１０名である場合に「○」とし、評価が良いとした人が１～６名である場合に「△」とし、評価が良いとした人が０人である場合に「×」とした。
（意匠評価）
　意匠評価では、官能試験として１０人の試験員で評価を行なった。評価が良いとした人が７～１０名である場合に「○」とし、評価が良いとした人が１～６名である場合に「△」とし、評価が良いとした人が０人である場合に「×」とした。
（長期環境試験）
　長期環境試験では、温度４０℃、湿度９０％の環境下に樹脂含浸化粧板１を２ヵ月間放置した後、意匠の変化に関する官能試験として１０人の試験員で評価を行なった。評価が良いとした人が７～１０名である場合に「○」とし、評価が良いとした人が１～６名である場合に「△」とし、評価が良いとした人が０人である場合に「×」とした。
（総合判定）
　上記のクロスカット試験、汚染試験、触感評価、意匠評価、長期環境試験による五項目によって総合的に評価した。特に優れているものを「◎」とし、優れているものを「○」とし、問題が殆どないものを「△」とし、問題があるものを「×」とした。
（評価結果）
　これらの評価結果を表１に示す。
Figure JPOXMLDOC01-appb-T000001
　表１に示すように、クロスカット試験は、実施例１～１５、及び比較例１の全てにおいて剥離は見られず、密着性に問題はなかった。しかしながら、熱硬化性樹脂層９を省略した比較例１に比べて、熱硬化性樹脂層９を設けた実施例１～１５では、耐汚染性や長期保管後の意匠安定性が向上した。特に、実施例１～４の評価結果が示すように、熱硬化性樹脂層９としてエポキシ系樹脂、カゼイン系樹脂、アクリル系樹脂、ウレタン系樹脂を採用したものは、耐汚染性及び長期保管後の意匠安定性について、優れているか、又は問題が殆どなかった。また、実施例５～９の評価結果が示すように、熱硬化性樹脂層９を厚くするほど、耐傷付性は向上するが、意匠性が低下する傾向があった。また、実施例１０～１４の評価結果が示すように、熱硬化性樹脂層９の塗布面積を増加させるほど、耐汚染性は向上するが、意匠性が低下する傾向があった。さらに、実施例１５の評価結果が示すように、熱硬化性樹脂層９に着色インキを加えることで、意匠表現の自由度が向上するだけでなく、発泡樹脂層８の白化も抑制でき、意匠性が向上した。総合判定としては、実施例６、７、１２、１５の樹脂含浸化粧板１が、特に優れていた。実施例５～１４では、熱硬化性樹脂層９としてエポキシ系樹脂を使用しているが、エポキシ系樹脂の代わりに、カゼイン系樹脂、アクリル系樹脂、ウレタン系樹脂等を用いたとしても、基本的な物性に大きな差はなく、略同等の結果が得られる。
　以上、限られた数の実施形態を参照しながら説明したが、権利範囲はそれらに限定されるものではなく、上記の開示に基づく実施形態の改変は、当業者にとって自明のことである。
　１…樹脂含浸化粧板、２…樹脂含浸化粧紙、３…基材、３ａ…表面、４…化粧紙、５…含浸樹脂、６…原紙、６ａ…表面、７…絵柄模様層、７ａ…表面、８…発泡樹脂層、８ａ…表面、９…熱硬化性樹脂層、１０…凹凸模様

Claims (10)

  1. 　化粧紙に含浸樹脂を含浸させた樹脂含浸化粧紙であって、
    　前記化粧紙は、
    　原紙と、
    　前記原紙の表面側に設けた絵柄模様層と、
    　前記絵柄模様層の表面上、又は前記絵柄模様層中に配置された発泡剤によって形成された発泡樹脂層と、
    　前記発泡樹脂層の表面上に設けた熱硬化性樹脂層と、を備え、
    　前記熱硬化性樹脂層は、エポキシ系樹脂、カゼイン系樹脂、アクリル系樹脂、ウレタン系樹脂の少なくとも一つを含むことを特徴とする樹脂含浸化粧紙。
  2. 　前記熱硬化性樹脂層は、厚さが１μｍ以上１５μｍ以下であることを特徴とする請求項１に記載の樹脂含浸化粧紙。
  3. 　前記熱硬化性樹脂層は、厚さが５μｍ以上１０μｍ以下であることを特徴とする請求項２に記載の樹脂含浸化粧紙。
  4. 　前記熱硬化性樹脂層は、前記発泡樹脂層の表面積のうち３０％以上の範囲に設けられることを特徴とする請求項１～３の何れか一項に記載の樹脂含浸化粧紙。
  5. 　前記熱硬化性樹脂層は、前記発泡樹脂層の表面積のうち５０％以上の範囲に設けられることを特徴とする請求項４に記載の樹脂含浸化粧紙。
  6. 　前記熱硬化性樹脂層は、着色インキを含有することを特徴とする請求項１～５の何れか一項に記載の樹脂含浸化粧紙。
  7. 　前記発泡剤は、発泡後の平均粒径が１５μｍ以上２５０μｍ以下であり、発泡開始温度が１００℃以上２２０℃以下であることを特徴とする請求項１～６の何れか一項に記載の樹脂含浸化粧紙。
  8. 　前記絵柄模様層が形成する絵柄と前記発泡樹脂層の配置位置とが同調していることを特徴とする請求項１～７の何れか一項に記載の樹脂含浸化粧紙。
  9. 　前記発泡剤は、発泡前の平均粒径が前記絵柄模様層の層厚の２／３倍以上５０倍以下であることを特徴とする請求項１～８の何れか一項に記載の樹脂含浸化粧紙。
  10. 　請求項１～９の何れか一項に記載の樹脂含浸化粧紙と、
    　前記樹脂含浸化粧紙に一体化された基材と、を備えることを特徴とする樹脂含浸化粧板。
PCT/JP2020/039763 2019-11-01 2020-10-22 樹脂含浸化粧紙、及び樹脂含浸化粧板 WO2021085305A1 (ja)

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