JP5316604B2 - Plywood and decorative plywood - Google Patents
Plywood and decorative plywood Download PDFInfo
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- JP5316604B2 JP5316604B2 JP2011158003A JP2011158003A JP5316604B2 JP 5316604 B2 JP5316604 B2 JP 5316604B2 JP 2011158003 A JP2011158003 A JP 2011158003A JP 2011158003 A JP2011158003 A JP 2011158003A JP 5316604 B2 JP5316604 B2 JP 5316604B2
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- adhesive
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- 239000010410 layer Substances 0.000 claims description 77
- 229920005989 resin Polymers 0.000 claims description 64
- 239000011347 resin Substances 0.000 claims description 62
- 239000002023 wood Substances 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 27
- 239000012790 adhesive layer Substances 0.000 claims description 25
- 239000000853 adhesive Substances 0.000 claims description 23
- 239000011241 protective layer Substances 0.000 claims description 23
- 230000001070 adhesive effect Effects 0.000 claims description 22
- 229920001187 thermosetting polymer Polymers 0.000 claims description 21
- 239000002657 fibrous material Substances 0.000 claims description 19
- 239000000123 paper Substances 0.000 claims description 19
- -1 polypropylene Polymers 0.000 claims description 19
- 229920000728 polyester Polymers 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 14
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- 229920001778 nylon Polymers 0.000 claims description 9
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- 229920006337 unsaturated polyester resin Polymers 0.000 claims description 6
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- 229920000877 Melamine resin Polymers 0.000 claims description 5
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- 229920000647 polyepoxide Polymers 0.000 claims description 5
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- 238000010894 electron beam technology Methods 0.000 description 9
- 239000007787 solid Substances 0.000 description 8
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- AGTPDKIQPDEUOA-UHFFFAOYSA-N 2-(dimethylamino)-3-propan-2-ylbenzoic acid Chemical compound CC(C)C1=CC=CC(C(O)=O)=C1N(C)C AGTPDKIQPDEUOA-UHFFFAOYSA-N 0.000 description 1
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical compound CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 description 1
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- 229910052582 BN Inorganic materials 0.000 description 1
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- 239000004709 Chlorinated polyethylene Substances 0.000 description 1
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- 239000004716 Ethylene/acrylic acid copolymer Substances 0.000 description 1
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
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- 239000004698 Polyethylene Substances 0.000 description 1
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
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- 150000008062 acetophenones Chemical class 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- 239000003963 antioxidant agent Substances 0.000 description 1
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- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- CHIHQLCVLOXUJW-UHFFFAOYSA-N benzoic anhydride Chemical compound C=1C=CC=CC=1C(=O)OC(=O)C1=CC=CC=C1 CHIHQLCVLOXUJW-UHFFFAOYSA-N 0.000 description 1
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- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 1
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- 229920001971 elastomer Polymers 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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- 235000019382 gum benzoic Nutrition 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
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- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
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- 229920001296 polysiloxane Polymers 0.000 description 1
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- 239000010703 silicon Substances 0.000 description 1
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
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Images
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- Finished Plywoods (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
Description
本発明は、寸法安定性の高い、合板及び化粧合板に関する。 The present invention relates to a plywood and a decorative plywood having high dimensional stability.
従来、木質基材上に化粧シートを積層してなる建材用化粧材が知られている。例えば、特許文献1には、ポリオレフィン系樹脂からなる不透明な基材シート上に、装飾層、ポリオレフィン系樹脂からなる透明オレフィン系樹脂層を順次積層してなる化粧シートを木質基材上に積層してなる建材用化粧材が開示されている。
Conventionally, a decorative material for building materials in which a decorative sheet is laminated on a wooden base material is known. For example, in
前記建材用化粧材における木質基材としては、従来、広葉樹のラワンが多用されている。良質な原木から採取されたラワン材を木質基材として用いた建材用化粧材は、耐衝撃性、耐傷性、耐キャスター等が優れている。 Conventionally, hardwood lauan has been frequently used as a woody base material in the decorative material for building materials. A decorative material for building materials using Lauan wood collected from good quality raw wood as a wooden base material has excellent impact resistance, scratch resistance, caster resistance, and the like.
しかしながら、近年、天然資源の窮乏、木材伐採制限等により良質な原木が入手し難く、材料不足が進んでいる。この問題は、特にラワン等の広葉樹にとって深刻である。よって、上記一枚板の木質基材の代替として、木質薄板を積層して得られる合板を使用することが提案されている。 However, in recent years, it has been difficult to obtain good quality logs due to the scarcity of natural resources and restrictions on logging of wood. This problem is particularly acute for hardwoods such as Lauan. Therefore, it has been proposed to use a plywood obtained by laminating thin wooden boards as an alternative to the above-mentioned single board wooden base.
合板原料としては、木質系廃材、MDF(中密度繊維板)等も使用できるため、合板は比較的確保し易いという長所がある。しかしながら、合板は、同厚みの一枚板と比較して、経時的に反り・ねじれが生じ易い。これは、合板を構成する木質薄板の種類(辺材、芯材等の種類)により密度、含水率等が異なるためである。 As the plywood raw material, wood-based waste materials, MDF (medium density fiberboard) and the like can be used, so that the plywood is relatively easy to secure. However, the plywood is more likely to warp and twist over time than a single plate of the same thickness. This is because the density, moisture content, and the like differ depending on the type of wooden thin plate constituting the plywood (type of sapwood, core, etc.).
経時的な反り・ねじれの発生が抑制された合板を開発できれば、低コストで一枚板と同程度の特性が得られる点で有利である。よって、このような寸法安定性の高い合板及び当該合板を用いた化粧合板の開発が望まれている。
本発明は、寸法安定性の高い合板及び化粧合板を提供することを主な目的とする。 The main object of the present invention is to provide a plywood and a decorative plywood with high dimensional stability.
本発明者は、上記目的を達成すべく鋭意研究を重ねた結果、特定の接着材層を有する合板が上記目的を達成できることを見出し、本発明を完成するに至った。 As a result of intensive studies to achieve the above object, the present inventor has found that a plywood having a specific adhesive layer can achieve the above object, and has completed the present invention.
即ち、本発明は、下記の合板及び化粧合板に関する。 That is, the present invention relates to the following plywood and decorative plywood.
1. 合板に、透明性樹脂層及び表面保護層を順に有する化粧シートを積層してなる化粧合板の製造方法であって、
前記透明性樹脂層は、熱可塑性樹脂により形成されたものであり、
以下の(i)〜(iii)工程:
(i) 木質薄板を積層することにより合板を製造する工程であって、
(1)隣接する木質薄板どうしをいずれも接着させ、かつ
(2)少なくとも最上層及び最下層の木質薄板を、熱硬化性樹脂と繊維質材料とを含む接着材層を介して、それぞれ隣接する木質薄板と接着させる工程、
(ii) 前記合板の最上層側に加熱させたPUR系(湿気硬化型)接着剤を付与する工程、
(iii) 前記合板の最上層側と前記化粧シートとを接着させる工程、
を順に含み、
前記(iii)工程の前において、前記表面保護層側からのエンボス加工によって化粧シートに凹凸模様を形成する、
化粧合板の製造方法。
2. 前記繊維質材料が、1)ポリエステル、ナイロン、レーヨン、ポリプロピレン、芳香族ポリアミド又はガラスからなる不織布、2)ポリエステル、ケブラー、ナイロン、ガラス、レーヨン、綿及びアセテートの少なくとも1種からなる織物、3)クラフト紙、和紙又はクレープ紙、並びに、4)ポリエステル、ナイロン、レーヨン、ポリプロピレン、芳香族ポリアミド又はガラスからなるチョップドファイバー、からなる群から選択される少なくとも1種である、上記項1に記載の化粧合板の製造方法。
3. 前記熱硬化性樹脂が、フェノール樹脂、ユリア樹脂、メラミン樹脂、ダップ樹脂、不飽和ポリエステル樹脂、アルキド樹脂及びエポキシ樹脂からなる群から選択される少なくとも1種である、上記項1又は2に記載の化粧合板の製造方法。
4. 前記木質薄板の材質が、植林材、針葉樹及び雑木材からなる群から選択される少なくとも1種である、上記項1〜3のいずれかに記載の化粧合板の製造方法。
5. 前記(i)工程において、合板表面に、熱硬化性樹脂と繊維質材料とを含む表面保護層を形成する、上記項1〜4のいずれかに記載の化粧合板の製造方法。
1 . A method for producing a decorative plywood, in which a decorative sheet having a transparent resin layer and a surface protective layer in order is laminated on the plywood,
The transparent resin layer is formed of a thermoplastic resin,
The following steps (i) to (iii) :
(i) a process of manufacturing a plywood by laminating wooden thin plates,
(1) both the adjacent thin wooden board to each other are adhered, and (2) at least top and bottom layers of the thin wooden boards, through an adhesive layer containing a thermosetting resin and fibrous material, adjacent each step Ru is adhered to the thin wooden board,
(ii) a step of applying a heated PUR (moisture curing type) adhesive to the uppermost layer side of the plywood,
(ii i ) bonding the uppermost layer side of the plywood and the decorative sheet ;
In order,
Before the step (iii), an uneven pattern is formed on the decorative sheet by embossing from the surface protective layer side .
A method for producing a decorative plywood .
2. The fibrous material is 1) a nonwoven fabric made of polyester, nylon, rayon, polypropylene, aromatic polyamide or glass, 2) a woven fabric made of at least one of polyester, kevlar, nylon, glass, rayon, cotton and acetate, 3) The makeup according to
3. Item 3. The
4). Item 4. The method for producing a decorative plywood according to any one of
5 .
1.合板
本発明合板は、木質薄板を積層してなる合板であって、
(1)隣接する木質薄板どうしはいずれも接着されており、
(2)少なくとも最上層及び最下層の木質薄板は、熱硬化性樹脂と繊維質材料とを含む接着材層を介して、それぞれ隣接する木質薄板と接着されている、
ことを特徴とする。
1. Plywood The present invention plywood is a plywood formed by laminating wood thin plates,
(1) Adjacent wooden thin plates are bonded together,
(2) At least the uppermost layer and the lowermost wood sheet are bonded to the adjacent wooden sheets via an adhesive layer containing a thermosetting resin and a fibrous material,
It is characterized by that.
本発明合板は、上記特徴を有する故に、寸法安定性が高い。従って、本発明合板に化粧シートを積層して化粧合板として用いる場合には、反り・ねじれの発生が抑制されており、高品質な化粧合板となる。 Since the plywood of the present invention has the above characteristics, it has high dimensional stability. Therefore, when a decorative sheet is laminated on the plywood of the present invention and used as a decorative plywood, the occurrence of warping and twisting is suppressed, and a high-quality decorative plywood is obtained.
木質薄板の材質は特に限定されない。例えば、針葉樹、広葉樹等の原木(杉、檜、欅、松、ラワン、チーク、メラピー、ポプラ等)から作製した薄板、MDF(中密度繊維板)、HDF(高密度繊維板)、植林材(早成材)、雑木材(MLH)などが挙げられる。 The material of the wood thin plate is not particularly limited. For example, thin plates, MDF (medium density fiberboard), HDF (high density fiberboard), afforestation material (such as cedar, birch, firewood, pine, lawan, teak, merapy, poplar, etc.) such as conifers and hardwoods Early-grown wood), miscellaneous wood (MLH), and the like.
本発明合板は、寸法安定性の問題から従来使用が困難であった植林材、針葉樹、雑木材、MDF、HDF等(特に植林材、針葉樹、雑木材)も木質薄板として使用できる点で有用性が高い。 The plywood of the present invention is useful in that it can also be used as a woody thin board for afforestation materials, conifers, miscellaneous timber, MDF, HDF, etc. (especially afforestation materials, conifers, miscellaneous timber) that have been difficult to use due to the problem of dimensional stability. Is expensive.
木質薄板の個々の厚みは限定的ではないが、0.5〜4mm程度が好ましく、0.5〜3mm程度がより好ましい。 The individual thickness of the wood thin plate is not limited, but is preferably about 0.5 to 4 mm, and more preferably about 0.5 to 3 mm.
木質薄板の積層数は限定的ではないが、3〜7枚程度が好ましく、5〜7枚程度がより好ましい。これらの複数の木質薄板を構成する樹種は、同一でも異なっていてもよい。 The number of laminated wood thin plates is not limited, but is preferably about 3 to 7, more preferably about 5 to 7. The tree species constituting the plurality of wood thin plates may be the same or different.
合板全体の厚みは限定的ではないが、3〜15cm程度が好ましい。 Although the thickness of the whole plywood is not limited, about 3-15 cm is preferable.
本発明合板において、木質薄板どうしはいずれも接着されている。そして、少なくとも最上層及び最下層の木質薄板は、熱硬化性樹脂と繊維質材料とを含む接着材層を介して、
それぞれ隣接する木質薄板と接着されている。
In the plywood of the present invention, the wood thin plates are bonded together. And at least the uppermost layer and the lowermost layer of wood thin plate, through an adhesive layer containing a thermosetting resin and a fibrous material,
Each is glued to the adjacent wood sheet.
例えば、木質薄板の積層枚数が2枚又は3枚の場合には、全ての木質薄板は、熱硬化性樹脂と繊維質材料とを含む接着材層を介して、それぞれ隣接する木質薄板と接着される。木質薄板の積層枚数が4枚の場合には、最上段と最下段の木質薄板は、熱硬化性樹脂と繊維質材料とを含む接着材層を介して、それぞれ隣接する木質薄板と接着される。そして、上から2段目の木質薄板と下から2段目の木質薄板とは、前記熱硬化性樹脂と繊維質材料とを含む接着材層を介して接着されていてもよく、その他の公知の接着剤により接着されていてもよい。以下、積層枚数が増加した場合も同様であり、少なくとも最上層及び最下層の木質薄板が熱可塑性樹脂と繊維質材料とを含む接着材層を介してそれぞれ隣接する木質薄板と接着されていればよく、合板芯材に相当する木質薄板どうしは、前記接着材層を介した接着に限定されず、公知の接着剤により接着されていてもよい。なお、本発明では、全ての木質薄板は、前記接着材層を介して接着されていることが好ましい。全ての木質薄板を、前記接着材層を介して接着する場合には、合板芯材の寸法安定性も確保できる点で好ましい。 For example, when the number of laminated wooden thin plates is two or three, all the wooden thin plates are respectively bonded to the adjacent wooden thin plates through an adhesive layer containing a thermosetting resin and a fibrous material. The When the number of laminated wooden sheets is 4, the uppermost and lowermost wooden sheets are bonded to the adjacent wooden sheets via an adhesive layer containing a thermosetting resin and a fibrous material. . The second-stage wood thin plate from the top and the second-stage wood thin plate from the bottom may be bonded via an adhesive layer containing the thermosetting resin and the fibrous material. It may be adhered by an adhesive. Hereinafter, the same applies to the case where the number of laminated layers is increased. At least the uppermost and lowermost wooden thin plates are bonded to the adjacent wooden thin plates, respectively, through an adhesive layer containing a thermoplastic resin and a fibrous material. Well, the wooden thin plates corresponding to the plywood core material are not limited to the bonding via the adhesive layer, and may be bonded by a known adhesive. In the present invention, it is preferable that all the wooden thin plates are bonded via the adhesive layer. When all the wood thin plates are bonded through the adhesive layer, it is preferable in that the dimensional stability of the plywood core material can be secured.
前記接着材層を構成する熱硬化性樹脂は特に限定されないが、例えば、フェノール樹脂、ユリア樹脂、メラミン樹脂、ダップ樹脂、不飽和ポリエステル樹脂、アルキド樹脂、エポキシ樹脂等が挙げられる。これらの熱硬化性樹脂は、2種以上を混合して使用できる。 Although the thermosetting resin which comprises the said adhesive material layer is not specifically limited, For example, a phenol resin, a urea resin, a melamine resin, a dapp resin, an unsaturated polyester resin, an alkyd resin, an epoxy resin etc. are mentioned. These thermosetting resins can be used in combination of two or more.
前記接着材層を構成する繊維質材料も特に限定されないが、例えば、1)ポリエステル、ナイロン、レーヨン、ポリプロピレン、芳香族ポリアミド又はガラスからなる不織布(スパンボンドも含む)、2)ポリエステル、ケブラー、ナイロン、ガラス、レーヨン、綿及びアセテートの少なくとも1種からなる織物、3)クラフト紙、和紙又はクレープ紙、並びに、4)ポリエステル、ナイロン、レーヨン、ポリプロピレン、芳香族ポリアミド又はガラスからなるチョップドファイバー、などが挙げられる。その他、5)草木、竹等の植物繊維をほぐしたもの、又はこれらの植物繊維をシート状に加工したもの、6)炭素繊維、なども使用できる。 The fibrous material constituting the adhesive layer is not particularly limited. For example, 1) Non-woven fabric (including spunbond) made of polyester, nylon, rayon, polypropylene, aromatic polyamide or glass, 2) Polyester, Kevlar, nylon Woven fabric made of at least one of glass, rayon, cotton and acetate, 3) kraft paper, Japanese paper or crepe paper, and 4) chopped fiber made of polyester, nylon, rayon, polypropylene, aromatic polyamide or glass, etc. Can be mentioned. In addition, 5) loosened plant fibers such as vegetation and bamboo, or those obtained by processing these plant fibers into sheets, 6) carbon fibers, and the like can be used.
上記の繊維質材料の中でも、ポリエステル、ガラス及びケブラーの少なくとも1種が好ましい。即ち、ポリエステル不織布、ポリエステル織物、ポリエステルチョップドファイバー;ガラス不織布、ガラス繊維、ガラスチョップドファイバー;ケブラー織物等が好ましい。 Among the above fibrous materials, at least one of polyester, glass and Kevlar is preferable. That is, polyester nonwoven fabric, polyester fabric, polyester chopped fiber; glass nonwoven fabric, glass fiber, glass chopped fiber; Kevlar fabric, etc. are preferable.
前記接着材層は、例えば、シート状の繊維質材料(例えば、紙)の表裏両面に接着材層形成用組成物(熱可塑性樹脂、溶剤等を含む組成物)を塗布したものを2枚の木質薄板で挟んだ後、樹脂成分を硬化させる方法、シート状の繊維質材料に接着材層形成用組成物を含浸したものを2枚の木質薄板で挟んだ後、樹脂成分を硬化させる方法、チョップドファイバーと接着材層形成用組成物との混練物を木質薄板の接着面に塗布し、木質薄板どうしを接合後、樹脂成分を硬化させる方法等により形成できる。 The adhesive layer is composed of, for example, two sheets obtained by applying an adhesive layer forming composition (a composition containing a thermoplastic resin, a solvent, etc.) on both front and back surfaces of a sheet-like fibrous material (for example, paper). A method of curing a resin component after being sandwiched between thin wood plates, a method of curing a resin component after sandwiching a sheet-like fibrous material impregnated with a composition for forming an adhesive layer between two thin wood plates, The kneaded product of the chopped fiber and the adhesive layer forming composition can be applied to the adhesion surface of the wood thin plates, and the wood thin plates can be joined to each other, and then the resin component can be cured.
前記接着材層の厚みは限定的ではないが、重量換算(硬化時)して50〜500g/m2程度が好ましく、50〜200g/m2程度がより好ましい。 The thickness of the adhesive layer is not limited, but is preferably about 50 to 500 g / m 2 , more preferably about 50 to 200 g / m 2 in terms of weight (when cured).
前記接着材層を介さない場合に用いる、その他公知の接着剤としては特に限定されない。例えば、樹脂を主材とする公知の接着剤が使用できる。例えば、樹脂を含む1液型接着剤、2液型接着剤、熱硬化型接着剤、ホットメルト型接着剤、紫外線硬化型接着剤、電子線硬化型接着剤等が使用できる。この中でも、熱硬化性樹脂、紫外線硬化型樹脂及び電子線硬化型樹脂の少なくとも1種が好ましい。その他、2液型接着剤(特に2液硬化型ウレタン系接着剤)も好適である。 It does not specifically limit as another well-known adhesive agent used when not passing through the said adhesive material layer. For example, a known adhesive mainly composed of a resin can be used. For example, a one-component adhesive containing a resin, a two-component adhesive, a thermosetting adhesive, a hot melt adhesive, an ultraviolet curable adhesive, an electron beam curable adhesive, and the like can be used. Among these, at least one of a thermosetting resin, an ultraviolet curable resin, and an electron beam curable resin is preferable. In addition, a two-part adhesive (particularly a two-part curable urethane adhesive) is also suitable.
合板は、例えば、木質薄板の間に前記接着材層形成用組成物及びその他の接着剤を所定部位に塗布後、積層体全体をプレスすることにより容易に作製できる。プレス時には、適宜加熱することができる。プレス条件、加熱条件等は、木質薄板、熱可塑性樹脂等の種類に応じて適宜設定できる。 The plywood can be easily produced by, for example, pressing the entire laminate after applying the composition for forming an adhesive layer and other adhesives to a predetermined portion between wood thin plates. Heating can be appropriately performed during pressing. Pressing conditions, heating conditions, and the like can be appropriately set according to the type of wood thin plate, thermoplastic resin, and the like.
本発明合板は、合板表面に表面保護層をさらに有してもよい。表面保護層を有する場合には、例えば、合板表面に落下物が生じた場合でも、凹みの程度を抑制することができる。表面保護層の形成面は特に限定されないが、例えば、合板のおもて面(化粧合板作製時に化粧シートを積層する面)が好ましい。 The plywood of the present invention may further have a surface protective layer on the plywood surface. In the case of having the surface protective layer, for example, even when a fallen object is generated on the surface of the plywood, the degree of dent can be suppressed. Although the formation surface of a surface protective layer is not specifically limited, For example, the front surface of a plywood (The surface which laminates | stacks a decorative sheet at the time of decorative plywood preparation) is preferable.
表面保護層は、熱硬化性樹脂を含む公知の表面保護層でもよく、熱可塑性樹脂と繊維質材料とを含む表面保護層(前記接着材層と同成分)であってもよい。表面保護層の形成方法は限定的ではないが、例えば、熱可塑性樹脂と溶剤との混合物、又は繊維質材料と前記接着材層形成用組成物との混合物により合板表面の所望部分を被覆後、樹脂成分を硬化させることにより容易に形成できる。 The surface protective layer may be a known surface protective layer containing a thermosetting resin, or may be a surface protective layer (same component as the adhesive layer) containing a thermoplastic resin and a fibrous material. The method for forming the surface protective layer is not limited, for example, after coating a desired portion of the plywood surface with a mixture of a thermoplastic resin and a solvent, or a mixture of a fibrous material and the composition for forming an adhesive layer, It can be easily formed by curing the resin component.
表面保護層の厚みは限定されないが、5〜200μm程度が好ましい。 Although the thickness of a surface protective layer is not limited, About 5-200 micrometers is preferable.
2.化粧合板
本発明化粧合板は、前記合板に化粧シートを積層してなる。
2. Decorative plywood The decorative plywood of the present invention is formed by laminating a decorative sheet on the plywood.
化粧シートの種類は特に限定されず、化粧合板の用途に応じて適宜選択できる。 The type of the decorative sheet is not particularly limited, and can be appropriately selected according to the use of the decorative plywood.
例えば、化粧シートとしては、基材シート上に、ベタインキ層、柄インキ層、接着剤層、透明性樹脂層、プライマー層及び表面保護層を順に積層してなるものが挙げられる。 For example, as a decorative sheet, a sheet obtained by laminating a solid ink layer, a pattern ink layer, an adhesive layer, a transparent resin layer, a primer layer and a surface protective layer in this order on a base sheet can be mentioned.
以下、上記化粧シートについて説明する。 Hereinafter, the decorative sheet will be described.
基材シートは、薄紙,上質紙,クラフト紙,和紙,チタン紙,樹脂含浸紙,紙間強化紙等の紙、木質繊維,ガラス繊維,石綿,ポリエステル繊維,ビニロン繊維,レーヨン繊維等の繊維からなる織布や不織布、あるいは、ポリオレフィン,ポリエステル,ポリアクリル,ポリアミド,ポリウレタン,ポリスチレン等の合成樹脂製シートなどの1種又は2種以上の積層体を用いることができ、その厚さとしては概ね20〜600μmが適当である。また、上記した化粧シート用の基材シートは適宜、顔料等を添加して着色してもよいし、必要な面にコロナ放電処理、プラズマ処理、オゾン処理等の易接着処理を施してもよい。 The base sheet is made of paper such as thin paper, fine paper, kraft paper, Japanese paper, titanium paper, resin-impregnated paper, paper-reinforced paper, wood fiber, glass fiber, asbestos, polyester fiber, vinylon fiber, rayon fiber, etc. One or two or more laminates such as woven fabrics and nonwoven fabrics, or synthetic resin sheets such as polyolefin, polyester, polyacryl, polyamide, polyurethane, and polystyrene can be used. Appropriately ~ 600 μm. In addition, the base sheet for the decorative sheet described above may be appropriately colored by adding a pigment or the like, or may be subjected to easy adhesion treatment such as corona discharge treatment, plasma treatment, ozone treatment on a necessary surface. .
絵柄層は、柄インキ層及びベタインキ層から構成される。これらは、一般的にはグラビア印刷、オフセット印刷、シルクスクリーン印刷等の周知の印刷法でインキを用いて形成することができる。柄インキ層としては、例えば、木目模様、石目模様、布目模様、皮紋模様、幾何学模様、文字、記号、線画、各種抽象模様柄であり、ベタインキ層としては、隠蔽性を有する着色インキでベタ印刷したものである。この実施形態では、柄インキ層及びベタインキ層の両方が設けられるが、いずれか一方の構成であってもよい。 The pattern layer is composed of a pattern ink layer and a solid ink layer. These can generally be formed using ink by a known printing method such as gravure printing, offset printing, silk screen printing or the like. Examples of the pattern ink layer include a wood grain pattern, a stone pattern, a texture pattern, a crest pattern, a geometric pattern, characters, symbols, line drawings, various abstract pattern patterns, and a solid ink layer includes a colored ink having a concealing property. This is a solid print. In this embodiment, both the pattern ink layer and the solid ink layer are provided, but either one of the configurations may be used.
絵柄層に用いるインキとしては、ビヒクルとして、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1種又は2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を用いることができる。本
発明では、環境問題、被印刷面との接着性等を考慮すると、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、ポリアミド系樹脂等の1種又は2種以上混合したものである。なお、ワイピングインキについても、上記で説明した絵柄層に用いるインキと同じインキで形成することができる。
As the ink used for the pattern layer, as a vehicle, chlorinated polyolefin such as chlorinated polyethylene and chlorinated polypropylene, polyester, polyurethane composed of isocyanate and polyol, polyacryl, polyvinyl acetate, polyvinyl chloride, and vinyl chloride-vinyl acetate are used. A polymer, a cellulose-based resin, a polyamide-based resin, or the like may be used alone or in combination, and a pigment, a solvent, various auxiliary agents, and the like may be added thereto to make an ink. In the present invention, in consideration of environmental problems, adhesion to the printing surface, etc., one or a mixture of two or more of polyester, polyurethane comprising polyisocyanate and polyol, polyacryl, polyamide resin and the like is mixed. The wiping ink can also be formed with the same ink as that used for the pattern layer described above.
透明性樹脂層は、透明性のものであれば限定されない。透明性樹脂層としては、例えば熱可塑性樹脂により形成されたものを好適に使用することができる。 The transparent resin layer is not limited as long as it is transparent. As a transparent resin layer, what was formed, for example with the thermoplastic resin can be used conveniently.
具体的には、軟質、半硬質又は硬質ポリ塩化ビニル、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリアミド、ポリエチレン、ポリプロピレン、エチレン・酢酸ビニル共重合体、エチレン・アクリル酸共重合体、エチレン・アクリル酸エステル共重合体、アイオノマー、アクリル酸エステル、メタアクリル酸エステル等を挙げることができる。これらの中でも、ポリプロピレン等のポリオレフィン系樹脂が好ましい。 Specifically, soft, semi-rigid or rigid polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyethylene, polypropylene, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ethylene / acrylic acid ester copolymer Polymers, ionomers, acrylic esters, methacrylic esters and the like can be mentioned. Among these, polyolefin resins such as polypropylene are preferable.
透明性樹脂層は、必要に応じて着色されていてもよい。この場合は、上記のような熱可塑性樹脂に対して着色材(顔料又は染料)を添加して着色することができる。着色材としては、前記の着色半透明層で挙げられた顔料又は染料を使用することができる。これらは、1種又は2種以上を選ぶことができる。また、着色材の添加量も、所望の色合い等に応じて適宜設定すればよい。 The transparent resin layer may be colored as necessary. In this case, a coloring material (pigment or dye) can be added to the above thermoplastic resin for coloring. As the coloring material, the pigments or dyes mentioned in the colored translucent layer can be used. These can select 1 type, or 2 or more types. Further, the addition amount of the colorant may be appropriately set according to the desired color tone.
透明性樹脂層には、必要に応じて充填剤、艶消し剤、発泡剤、難燃剤、滑剤、帯電防止剤、酸化防止剤、紫外線吸収剤、光安定化剤、ラジカル捕捉剤、軟質成分(例えば、ゴム)等の各種の添加剤が含まれていてもよい。 For the transparent resin layer, a filler, a matting agent, a foaming agent, a flame retardant, a lubricant, an antistatic agent, an antioxidant, an ultraviolet absorber, a light stabilizer, a radical scavenger, a soft component (as necessary) For example, various additives such as rubber) may be included.
表面保護層は、化粧シートに要求される耐擦傷性、耐摩耗性、耐水性、耐汚染性等の表面物性を付与するために設けられる。この表面保護層を形成する樹脂としては、熱硬化型樹脂ないし電離放射線硬化型樹脂等の硬化型樹脂を用いて形成するのが適当である。特に、表面硬度が硬く、生産性に優れるという点で電離放射線硬化型樹脂を用いることがより好ましい。 The surface protective layer is provided for imparting surface physical properties such as scratch resistance, abrasion resistance, water resistance, and stain resistance required for the decorative sheet. The resin for forming the surface protective layer is suitably formed using a curable resin such as a thermosetting resin or an ionizing radiation curable resin. In particular, it is more preferable to use an ionizing radiation curable resin because it has a high surface hardness and excellent productivity.
熱硬化型樹脂としては、例えば、不飽和ポリエステル樹脂、ポリウレタン樹脂(2液硬化型ポリウレタンも含む)、エポキシ樹脂、アミノアルキッド樹脂、フェノール樹脂、尿素樹脂、ジアリルフタレート樹脂、メラミン樹脂、グアナミン樹脂、メラミン−尿素共縮合樹脂、珪素樹脂、ポリシロキサン樹脂等を挙げることができる。 Examples of thermosetting resins include unsaturated polyester resins, polyurethane resins (including two-component curable polyurethane), epoxy resins, amino alkyd resins, phenol resins, urea resins, diallyl phthalate resins, melamine resins, guanamine resins, and melamines. -Urea cocondensation resin, silicon resin, polysiloxane resin, etc. can be mentioned.
上記樹脂には、必要に応じて架橋剤、重合開始剤等の硬化剤、重合促進剤を添加することができる。例えば、硬化剤としてはイソシアネート、有機スルホン酸塩等が不飽和ポリエステル樹脂やポリウレタン樹脂等に添加され、有機アミン等がエポキシ樹脂に添加され、メチルエチルケトンパーオキサイド等の過酸化物やアゾイソブチルニトリル等のラジカル開始剤が不飽和ポリエステル樹脂に添加される。 A curing agent such as a cross-linking agent and a polymerization initiator, and a polymerization accelerator can be added to the resin as necessary. For example, as curing agents, isocyanates, organic sulfonates, etc. are added to unsaturated polyester resins, polyurethane resins, etc., organic amines, etc. are added to epoxy resins, peroxides such as methyl ethyl ketone peroxide, azoisobutyl nitrile, etc. A radical initiator is added to the unsaturated polyester resin.
上記熱硬化型樹脂で表面保護層を形成する方法としては、例えば、上記した熱硬化型樹脂を溶液とし、この溶液をロールコート法、グラビアコート法等の周知の塗布法で塗布し、乾燥し、硬化させる方法が挙げられる。上記溶液の塗布量としては、固形分で概ね5〜30μmが適当であり、好ましくは15〜25μmとすればよい。 As a method of forming the surface protective layer with the thermosetting resin, for example, the thermosetting resin described above is used as a solution, and this solution is applied by a well-known application method such as a roll coating method or a gravure coating method and then dried. And a curing method. The coating amount of the above solution is suitably about 5 to 30 μm in solid content, and preferably 15 to 25 μm.
電離放射線硬化型樹脂は、電離放射線を照射することにより架橋重合反応を起こして3次元の高分子構造に変化する樹脂であれば限定されない。電離放射線は、電磁波又は荷電粒子線のうち分子を重合、架橋し得るエネルギー量子を有するものを意味し、例えば、可視光線、紫外線(近紫外線、真空紫外線等)、X線、電子線、イオン線等があるが、特に
紫外線、電子線等を用いることが望ましい。紫外線源としては、超高圧水銀灯、高圧水銀灯、低圧水銀灯、カーボンアーク灯、ブラックライト蛍光灯、メタルハライドランプ灯の光源が使用できる。紫外線の波長としては、190〜380nm程度の波長域を使用することができる。また、電子線源としては、例えば、コッククロフトワルト型、バンデグラフト型、共振変圧器型、絶縁コア変圧器型、直線型、ダイナミトロン型、高周波型等の各種電子線加速器を用いることができる。用いる電子線としては、一般に100〜1000keV程度、好ましくは100〜300keVのものを使用することができる。電子線の照射量は、通常2〜15Mrad程度とすればよい。
The ionizing radiation curable resin is not limited as long as it is a resin that undergoes a cross-linking polymerization reaction by irradiation with ionizing radiation and changes to a three-dimensional polymer structure. Ionizing radiation means an electromagnetic wave or charged particle beam having an energy quantum capable of polymerizing and crosslinking molecules, such as visible light, ultraviolet light (near ultraviolet light, vacuum ultraviolet light, etc.), X-rays, electron beams, ion beams. In particular, it is desirable to use ultraviolet rays, electron beams, and the like. As the ultraviolet light source, a light source such as an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light fluorescent lamp, or a metal halide lamp can be used. As the wavelength of the ultraviolet light, a wavelength range of about 190 to 380 nm can be used. As the electron beam source, various electron beam accelerators such as a cockcroft-wald type, a bandegraft type, a resonant transformer type, an insulating core transformer type, a linear type, a dynamitron type, and a high frequency type can be used. As an electron beam to be used, generally about 100 to 1000 keV, preferably 100 to 300 keV can be used. The irradiation amount of the electron beam is usually about 2 to 15 Mrad.
上記の電離放射線硬化型樹脂は電子線を照射すれば十分に硬化するが、紫外線を照射して硬化させる場合には、増感剤として光重合開始剤を添加する。ラジカル重合性不飽和基を有する樹脂系の場合の光重合開始剤は、例えば、アセトフェノン類、ベンゾフェノン類、チオキサントン類、ベンゾイン、ベンゾインメチルエーテル、ミヒラーベンゾイルベンゾエート、ミヒラーケトン、ジフェニルサルファイド、ジベンジルジサルファイド、ジエチルオキサイト、トリフェニルビイミダゾール、イソプロピル−N,N−ジメチルアミノベンゾエート等を単独又は混合して用いることができる。また、カチオン重合性官能基を有する樹脂系の場合は、例えば、芳香族ジアゾニウム塩、芳香族スルホニウム塩、メタロセン化合物、ベンゾインスルホン酸エステル、フリールオキシスルホキソニウムジアリルヨードシル塩等を単独又は混合物として用いることができる。 The ionizing radiation curable resin is sufficiently cured when irradiated with an electron beam. However, when cured by irradiation with ultraviolet rays, a photopolymerization initiator is added as a sensitizer. Photopolymerization initiators in the case of resin systems having radically polymerizable unsaturated groups include, for example, acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ether, Michler benzoylbenzoate, Michler ketone, diphenyl sulfide, dibenzyl disulfide , Diethyl oxide, triphenylbiimidazole, isopropyl-N, N-dimethylaminobenzoate and the like can be used alone or in combination. In the case of a resin system having a cationic polymerizable functional group, for example, an aromatic diazonium salt, an aromatic sulfonium salt, a metallocene compound, a benzoin sulfonic acid ester, a freeloxysulfoxonium diallyl iodosyl salt, etc., alone or as a mixture Can be used as
光重合開始剤の添加量は特に限定されないが、一般に電離放射線硬化型樹脂100重量部に対して0.1〜10重量部程度とすればよい。 Although the addition amount of a photoinitiator is not specifically limited, Generally it should just be about 0.1-10 weight part with respect to 100 weight part of ionizing radiation-curable resins.
電離放射線硬化型樹脂で保護層を形成する方法としては、例えば、電離放射線硬化型樹脂を溶液とし、この溶液をグラビアコート法、ロールコート法等の周知の塗布法で塗布すればよい。この場合の溶液の塗布量としては、固形分として概ね5〜30μmとすればよく、より好ましくは15〜25μmとすればよい。 As a method for forming the protective layer with an ionizing radiation curable resin, for example, an ionizing radiation curable resin may be used as a solution, and this solution may be applied by a known coating method such as a gravure coating method or a roll coating method. In this case, the coating amount of the solution may be about 5 to 30 μm, more preferably 15 to 25 μm as the solid content.
また、電離放射線硬化型樹脂から形成された表面保護層に、より一層耐擦傷性、耐摩耗性を付与する場合には、必要に応じて無機充填材を配合することができる。例えば、粉末状の酸化アルミニウム、炭化珪素、二酸化珪素、チタン酸カルシウム、チタン酸バリウム、マグネシウムパイロボレート、酸化亜鉛、窒化珪素、酸化ジルコニウム、酸化クロム、酸化鉄、窒化硼素、ダイアモンド、金剛砂、ガラス繊維等が挙げられる。 In addition, an inorganic filler can be blended as necessary when further imparting scratch resistance and abrasion resistance to the surface protective layer formed from the ionizing radiation curable resin. For example, powdered aluminum oxide, silicon carbide, silicon dioxide, calcium titanate, barium titanate, magnesium pyroborate, zinc oxide, silicon nitride, zirconium oxide, chromium oxide, iron oxide, boron nitride, diamond, gold sand, glass fiber Etc.
無機充填材の使用量は限定的ではないが、通常は電離放射線硬化型樹脂100重量部に対して1〜80重量部程度とすればよい。 Although the usage-amount of an inorganic filler is not limited, Usually, what is necessary is just to be about 1-80 weight part with respect to 100 weight part of ionizing radiation curable resins.
各層の積層は、通常の手順で実施すればよい。例えば、着色した基材シートの一方の面にインキ層(ベタインキ層、柄インキ層)を順に印刷により形成し、さらに前記絵柄層上に2液硬化型ウレタン樹脂等の公知のドライラミネーション用接着剤で形成した接着剤層を介して透明性樹脂層を公知のドライラミネーション法、Tダイ押出し法等で積層し、透明性樹脂層の全面にプライマー層を設け、その上に表面保護層を形成すればよい。
The lamination of each layer may be performed by a normal procedure. For example, an ink layer (solid ink layer, pattern ink layer) is sequentially formed on one side of a colored substrate sheet by printing, and a known dry lamination adhesive such as a two-component curable urethane resin is further formed on the pattern layer. A transparent resin layer is laminated by a known dry lamination method, T-die extrusion method, etc. through the adhesive layer formed in
そして、必要に応じて表面保護層側からエンボス加工を施すことにより凹凸模様を形成することができる。凹凸模様は、加熱プレスやヘアライン加工などにより形成することができる。前記凹凸模様としては、例えば導管溝、石板表面凹凸、布表面テクスチュア、梨地、砂目、ヘアライン、万線条溝等が挙げられる。 And an uneven | corrugated pattern can be formed by embossing from the surface protective layer side as needed. The concavo-convex pattern can be formed by heating press, hairline processing, or the like. Examples of the uneven pattern include a conduit groove, a stone plate surface unevenness, a cloth surface texture, a satin finish, a grain, a hairline, and a multiline groove.
本発明合板に化粧シートを積層する場合には、公知の接着剤を使用できる。 When laminating a decorative sheet on the plywood of the present invention, a known adhesive can be used.
本発明合板は、少なくとも最上層及び最下層の木質薄板が前記特定の接着材層を介して接着されているため、合板の反り・ねじれが抑制されている(寸法安定性が高い)。木質薄板の全てが前記接着材層を介して接着されている場合には、特に寸法安定性が高い。 In the plywood according to the present invention, at least the uppermost layer and the lowermost woody thin plate are bonded via the specific adhesive layer, so that warping and twisting of the plywood are suppressed (high dimensional stability). The dimensional stability is particularly high when all of the wooden thin plates are bonded via the adhesive layer.
本発明合板は、従来、寸法安定性の問題により使用が困難であった木質薄板についても、木質薄板として使用できる。例えば、植林材、針葉樹、雑木材等である。 The plywood of the present invention can be used as a wood thin plate even for a wood thin plate that has been difficult to use due to the problem of dimensional stability. For example, plantation materials, conifers, miscellaneous timber and the like.
本発明合板は、合板表面に表面保護層を有する場合には、落下物に対する耐凹み性を向上させることができる。 In the case where the plywood of the present invention has a surface protective layer on the plywood surface, the dent resistance against falling objects can be improved.
以下に実施例及び比較例を示し、本発明をより具体的に説明する。但し、本発明は実施例に限定されない。 Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples. However, the present invention is not limited to the examples.
実施例1
MLH材(広葉樹であるが、樹木種類を問わない仕様)をロータリーレースで裁断し、下記5枚の木質薄板を作製した。
Example 1
MLH material (which is hardwood, but does not matter what kind of tree) was cut with a rotary lace, and the following five wood thin plates were produced.
第1層用薄板:1.3mm
第2層用薄板:3.4mm
第3層用薄板:3.4mm
第4層用薄板:3.4mm
第5層用薄板:1.3mm
これらの薄板を130℃で乾燥し、含水率を10%以下とした。
Thin plate for the first layer: 1.3mm
Second layer thin plate: 3.4 mm
Third layer thin plate: 3.4 mm
Fourth layer thin plate: 3.4 mm
5th layer thin plate: 1.3 mm
These thin plates were dried at 130 ° C., and the water content was adjusted to 10% or less.
図1に示すように、下から第5層用薄板、フェノール含浸紙、第4層用薄板を積層後、スプレッターロールで両面に約15g/尺角のユリア系接着剤を塗布した第3層用薄板を積層した。次いで、その上に第2層用薄板を積層後、前記と同じフェノール含浸紙、第1層用薄板を積層した。 As shown in FIG. 1, after laminating a fifth layer thin plate, phenol-impregnated paper, and fourth layer thin plate from the bottom, for a third layer coated with about 15 g / scale angle urea adhesive on both sides with a spreader roll Thin plates were laminated. Subsequently, after laminating the second layer sheet, the same phenol-impregnated paper and the first layer sheet were laminated.
次いで、積層体を130℃×10kgf/cm2×7分間の条件で熱圧プレス処理し、合板を製造した。 Subsequently, the laminated body was hot-pressed under conditions of 130 ° C. × 10 kgf / cm 2 × 7 minutes to produce a plywood.
実施例2
樹種を針葉樹(カラ松)に変えた以外は、実施例1と同様にして合板を製造した。
Example 2
A plywood was produced in the same manner as in Example 1 except that the tree species was changed to conifer (cara pine).
実施例3
針葉樹(カラ松)をロータリーレースで裁断し、下記5枚の木質薄板を作製した。
Example 3
The coniferous tree (cara pine) was cut with a rotary lace, and the following five wood thin plates were produced.
第1層用薄板:1.3mm
第2層用薄板:3.4mm
第3層用薄板:3.4mm
第4層用薄板:3.4mm
第5層用薄板:1.3mm
これらの薄板を130℃で乾燥し、含水率を10%以下とした。
Thin plate for the first layer: 1.3mm
Second layer thin plate: 3.4 mm
Third layer thin plate: 3.4 mm
Fourth layer thin plate: 3.4 mm
5th layer thin plate: 1.3 mm
These thin plates were dried at 130 ° C., and the water content was adjusted to 10% or less.
図2に示すように、下から第5層用薄板、フェノール含浸紙、第4層用薄板を積層後、スプレッターロールで両面に約15g/尺角のユリア系接着剤を塗布した第3層用薄板を積層した。次いで、その上に第2層用薄板を積層後、前記と同じフェノール含浸紙、第1層用薄板を積層した。さらに、第1層用薄板の上に、前記と同じフェノール含浸紙を積層した。 As shown in FIG. 2, for the third layer, a fifth layer thin plate, phenol-impregnated paper, and fourth layer thin plate are laminated from the bottom, and a urea adhesive of about 15 g / scale angle is applied to both sides with a spreader roll. Thin plates were laminated. Subsequently, after laminating the second layer sheet, the same phenol-impregnated paper and the first layer sheet were laminated. Further, the same phenol-impregnated paper as described above was laminated on the first layer thin plate.
次いで、積層体を130℃×10kgf/cm2×7分間の条件で熱圧プレス処理し、合板を製造した。 Subsequently, the laminated body was hot-pressed under conditions of 130 ° C. × 10 kgf / cm 2 × 7 minutes to produce a plywood.
比較例1
針葉樹(カラ松)をロータリーレースで裁断し、下記5枚の木質薄板を作製した。
Comparative Example 1
The coniferous tree (cara pine) was cut with a rotary lace, and the following five wood thin plates were produced.
第1層用薄板:1.3mm
第2層用薄板:3.4mm
第3層用薄板:3.4mm
第4層用薄板:3.4mm
第5層用薄板:1.3mm
これらの薄板を130℃で乾燥し、含水率を10%以下とした。
Thin plate for the first layer: 1.3mm
Second layer thin plate: 3.4 mm
Third layer thin plate: 3.4 mm
Fourth layer thin plate: 3.4 mm
5th layer thin plate: 1.3 mm
These thin plates were dried at 130 ° C., and the water content was adjusted to 10% or less.
下から第5層用薄板、スプレッターロールで両面に約15g/尺角のユリア系接着剤を塗布した第4層用薄板を積層後、その上に第3層用薄板を置き、次いで、スプレッターロールで両面に約15g/尺角のユリア系接着剤を塗布した第2層用薄板を積層後、さらに第1層用薄板を積層した。即ち、熱硬化性樹脂を使用し、繊維質材料を使用せずに材料を積層した。 5th layer thin plate from the bottom, a 4th layer thin plate coated with about 15g / scale angle urea adhesive on both sides with a spreader roll is laminated, then the 3rd layer thin plate is placed thereon, then the spreader roll Then, after laminating the thin plate for the second layer coated with a urea adhesive of about 15 g / scale angle on both sides, the thin plate for the first layer was further laminated. That is, a thermosetting resin was used and the materials were laminated without using a fibrous material.
次いで、積層体を130℃×10kgf/cm2×7分間の条件で熱圧プレス処理し、合板を製造した。 Subsequently, the laminated body was hot-pressed under conditions of 130 ° C. × 10 kgf / cm 2 × 7 minutes to produce a plywood.
試験例1(外観評価)
実施例及び比較例で製造した合板の第1層側と、床材用化粧シート(0.16mm厚、大日本印刷株式会社製)とをPUR系(湿気硬化型)接着剤を約40g/m2(硬化時)用いてラミネートした。
Test example 1 (appearance evaluation)
The first layer side of the plywood produced in the examples and comparative examples, and the decorative sheet for flooring (0.16 mm thickness, manufactured by Dai Nippon Printing Co., Ltd.), a PUR-based (moisture-curable) adhesive is about 40 g / m. 2 (when cured) and laminated.
得られた床用化粧材の外観評価を行った。外観評価は、床材用化粧シートが合板表面の影響をどの程度受けるかという観点から行った。 The appearance of the obtained flooring decorative material was evaluated. Appearance evaluation was performed from the viewpoint of how much the decorative sheet for flooring is affected by the plywood surface.
合板表面の影響を殆ど受けず、貼り上がり品質が良いものは○と評価した。合板表面の影響を少し受けているものを△と評価した。合板表面の影響を大きく受けているものを×と評価した。 A sample which was hardly affected by the surface of the plywood and had good pasting quality was evaluated as “Good”. Those that were slightly affected by the plywood surface were evaluated as Δ. Those which were greatly influenced by the surface of the plywood were evaluated as x.
試験例2(鉛筆硬度試験)
床用化粧材の鉛筆硬度を測定した。試験は、JIS K5400に従って行った。
Test example 2 (pencil hardness test)
The pencil hardness of the flooring material was measured. The test was performed according to JIS K5400.
試験例3(反り試験)
床用化粧材(1尺×6尺)を、温度5℃、湿度30%で1週間放置後、更に温度40℃、湿度90%で1週間放置した。次いで、床用化粧材の反り・ねじれの有無を肉眼により確認した。
Test example 3 (warp test)
A flooring decorative material (1 scale × 6 scale) was allowed to stand at a temperature of 5 ° C. and a humidity of 30% for 1 week, and further allowed to stand at a temperature of 40 ° C. and a humidity of 90% for 1 week. Next, the presence or absence of warping or twisting of the floor decorative material was confirmed with the naked eye.
反り・ねじれが認められないものを○と評価した。反り・ねじれが認められるものを×
と評価した。
A case where warpage or twist was not recognized was evaluated as ◯. Those that warp or twist
It was evaluated.
これらの試験結果を下記表1に示す。 The test results are shown in Table 1 below.
Claims (5)
前記透明性樹脂層は、熱可塑性樹脂により形成されたものであり、
以下の(i)〜(iii)工程:
(i) 木質薄板を積層することにより合板を製造する工程であって、
(1)隣接する木質薄板どうしをいずれも接着させ、かつ
(2)少なくとも最上層及び最下層の木質薄板を、熱硬化性樹脂と繊維質材料とを含む接着材層を介して、それぞれ隣接する木質薄板と接着させる工程、
(ii) 前記合板の最上層側に加熱させたPUR系(湿気硬化型)接着剤を付与する工程、
(iii) 前記合板の最上層側と前記化粧シートとを接着させる工程、
を順に含み、
前記(iii)工程の前において、前記表面保護層側からのエンボス加工によって化粧シートに凹凸模様を形成する、
化粧合板の製造方法。 A method for producing a decorative plywood, in which a decorative sheet having a transparent resin layer and a surface protective layer in order is laminated on the plywood,
The transparent resin layer is formed of a thermoplastic resin,
The following steps (i) to (iii) :
(i) a process of manufacturing a plywood by laminating wooden thin plates,
(1) both the adjacent thin wooden board to each other are adhered, and (2) at least top and bottom layers of the thin wooden boards, through an adhesive layer containing a thermosetting resin and fibrous material, adjacent each step Ru is adhered to the thin wooden board,
(ii) a step of applying a heated PUR (moisture curing type) adhesive to the uppermost layer side of the plywood,
(ii i ) bonding the uppermost layer side of the plywood and the decorative sheet ;
In order,
Before the step (iii), an uneven pattern is formed on the decorative sheet by embossing from the surface protective layer side .
A method for producing a decorative plywood .
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