JP3453440B2 - Architectural interior panels - Google Patents
Architectural interior panelsInfo
- Publication number
- JP3453440B2 JP3453440B2 JP26893294A JP26893294A JP3453440B2 JP 3453440 B2 JP3453440 B2 JP 3453440B2 JP 26893294 A JP26893294 A JP 26893294A JP 26893294 A JP26893294 A JP 26893294A JP 3453440 B2 JP3453440 B2 JP 3453440B2
- Authority
- JP
- Japan
- Prior art keywords
- paper
- layer
- base material
- paper layer
- sheet
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 239000000463 material Substances 0.000 claims description 90
- 239000000758 substrate Substances 0.000 claims description 40
- 229920003002 synthetic resin Polymers 0.000 claims description 25
- 239000000057 synthetic resin Substances 0.000 claims description 25
- 238000010276 construction Methods 0.000 claims description 8
- 239000010410 layer Substances 0.000 description 224
- 239000000123 paper Substances 0.000 description 201
- 238000009408 flooring Methods 0.000 description 28
- 239000000853 adhesive Substances 0.000 description 24
- 230000001070 adhesive effect Effects 0.000 description 24
- 230000037303 wrinkles Effects 0.000 description 18
- 238000005452 bending Methods 0.000 description 17
- -1 polyethylene Polymers 0.000 description 14
- 239000004698 Polyethylene Substances 0.000 description 13
- 229920000573 polyethylene Polymers 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 239000011120 plywood Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 5
- 239000002023 wood Substances 0.000 description 5
- CKQCRFAWBXQOGU-UHFFFAOYSA-N ethenyl acetate;urea Chemical compound NC(N)=O.CC(=O)OC=C CKQCRFAWBXQOGU-UHFFFAOYSA-N 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 229920002522 Wood fibre Polymers 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 239000011094 fiberboard Substances 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 239000002655 kraft paper Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000002025 wood fiber Substances 0.000 description 3
- XUMBMVFBXHLACL-UHFFFAOYSA-N Melanin Chemical compound O=C1C(=O)C(C2=CNC3=C(C(C(=O)C4=C32)=O)C)=C2C4=CNC2=C1C XUMBMVFBXHLACL-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- HNPDNOZNULJJDL-UHFFFAOYSA-N ethyl n-ethenylcarbamate Chemical compound CCOC(=O)NC=C HNPDNOZNULJJDL-UHFFFAOYSA-N 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Finishing Walls (AREA)
- Floor Finish (AREA)
- Laminated Bodies (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、例えば建築物の床仕
上げ用パネル等として好適に使用できる建築用内装パネ
ルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building interior panel which can be suitably used as, for example, a floor finishing panel for buildings.
【０００２】[0002]
【従来の技術】従来、床仕上げに使用される床材等の建
築用内装パネルは、合板等の板状基材の表面に化粧層が
設けられたものにより構成されているが、表裏間でのバ
ランスを図るために、基材裏面に裏打層を設け、しかも
その裏打層に防湿性を付与して、裏面からの吸水、吸湿
をも防止することが一般に行われている。2. Description of the Related Art Conventionally, architectural interior panels such as flooring materials used for floor finishing are constructed by providing a decorative layer on the surface of a plate-like base material such as plywood. In order to balance the above, it is generally practiced to provide a backing layer on the back surface of the base material, and to impart moisture resistance to the backing layer to prevent water absorption and moisture absorption from the back surface.
【０００３】防湿性を付与するには裏打層として、合成
樹脂からなる単層シートや、あるいは紙、不織布、織布
の片面に合成樹脂層を形成した２層シートを用いたりす
る。しかしながら、合成樹脂は、木質材との接着性に劣
るため、合成樹脂の単層シートを用いる場合には、基材
との接着性および施工時の床下地との接着性に問題が生
じ、２層シートを用いる場合には、基材との接着性また
は床下地との接着性に問題が生じることになる。To provide moisture resistance, a single layer sheet made of synthetic resin or a two-layer sheet having a synthetic resin layer formed on one side of paper, non-woven fabric or woven fabric is used as the backing layer. However, since the synthetic resin is inferior in adhesiveness to a wood material, when a synthetic resin single layer sheet is used, there arises a problem in adhesiveness to a base material and adhesiveness to a floor base during construction. When the layered sheet is used, there is a problem in the adhesiveness with the base material or the adhesiveness with the floor base.
【０００４】このため、内装パネルの裏打層用として
は、合成樹脂層の両面に、それぞれ紙層や不織布層を形
成した３層シートを使用することが好ましいが、不織布
は紙に比べて高価であるため、合成樹脂層の両面に紙層
が形成された３層シート、例えばポリエチレンがクラフ
ト紙により両側からサンドされたポリサンド紙等が好適
に使用されている。Therefore, for the backing layer of the interior panel, it is preferable to use a three-layer sheet in which a paper layer and a non-woven fabric layer are formed on both sides of the synthetic resin layer, but the non-woven fabric is more expensive than paper. Therefore, a three-layer sheet in which paper layers are formed on both sides of a synthetic resin layer, for example, polysand paper in which polyethylene is sanded from both sides by kraft paper, is preferably used.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、図２
（ａ）に示すように、従来の内装パネル裏打層として使
用される３層シート（３）は、基材（２）の裏面に接着
剤により貼着されるため、３層シート（３）の両側の紙
層（３ａ）（３ｂ）のうち、基材側の紙層（３ａ）は、
接着剤から水分を吸収して部分的に伸びるようになる。
このため、パネル中間部や端部において、基材側紙層
（３ａ）が部分的に浮き上がり、それに押されて合成樹
脂層（３ｃ）および外側の紙層（３ｂ）も浮き上がっ
て、浮き上がり部（４）が形成されてしまう。However, as shown in FIG.
As shown in (a), since the three-layer sheet (3) used as a conventional interior panel backing layer is attached to the back surface of the base material (2) with an adhesive, the three-layer sheet (3) Of the paper layers (3a) and (3b) on both sides, the paper layer (3a) on the base material side is
It absorbs moisture from the adhesive and becomes partially stretched.
Therefore, the base material side paper layer (3a) is partially lifted at the panel middle portion and the end portion, and the synthetic resin layer (3c) and the outer paper layer (3b) are also lifted by being pushed by the base material side paper layer (3a) and the raised portion ( 4) is formed.
【０００６】そしてその状態で、次工程において、多数
のパネルが重ね合わされて圧締されると、図２（ｂ）に
示すように、３層シート（３）の浮き上がり部（４）が
押し潰されて、折れ曲がりや皺（５）が形成される。こ
の折れ曲がりや皺（５）は、破れや剥離の要因となり、
パネルの防水性を低下させる恐れがある。Then, in that state, in the next step, when a large number of panels are overlapped and pressed, the raised portion (4) of the three-layer sheet (3) is crushed as shown in FIG. 2 (b). As a result, bends and wrinkles (5) are formed. The bending and wrinkles (5) cause breakage and peeling,
It may reduce the waterproofness of the panel.
【０００７】一方、パネル裏面側の３層シート（３）
は、施工後は隠蔽されるので、上記３層シート（３）の
折れ曲がりや皺（５）は、施工後の美観に悪影響を及ぼ
すことはないが、パネル製品の搬入時や施工中に、たと
え裏面側と言えど折れ曲がりや皺（５）が見えると、不
安感が生じたり、あるいは商品価値を低下させる要因と
もなり、好ましいものではなかった。On the other hand, a three-layer sheet (3) on the back side of the panel
Since it is hidden after construction, the bending and wrinkles (5) of the three-layer sheet (3) do not adversely affect the aesthetic appearance after construction, but even if the panel product is carried in or during construction. Even if it is on the back side, if a bend or wrinkle (5) is visible, it may cause anxiety or cause a decrease in commercial value, which is not preferable.
【０００８】この発明は、上記従来技術の問題を解消
し、パネル裏面における３層シートの浮き上がりを防止
でき、折れ曲がりや皺の発生を防止できて、防水、防湿
性の低下および商品価値の低下等を防止できる建築用内
装パネルを提供することを目的とする。The present invention solves the above-mentioned problems of the prior art, prevents the three-layer sheet from rising on the back surface of the panel, prevents bending and wrinkles, and reduces the waterproof and moisture-proof properties and the commercial value. An object is to provide an interior panel for construction that can prevent
【０００９】＜従来品の分析＞
本発明者は、従来の建築用内装パネルにおいて、３層シ
ート（３）両側の紙層（３ａ）（３ｂ）に着目して、３
層シート（３）の浮き上がりのメカニズムについて、詳
しく追究した。<Analysis of Conventional Products> The present inventor has focused on the paper layers (3a) and (3b) on both sides of the three-layer sheet (3) in the conventional interior panel for building.
The lifting mechanism of the layered sheet (3) was investigated in detail.
【００１０】まず３層シート（３）の紙層（３ａ）（３
ｂ）は、木材繊維の絡み合いによる紙により構成される
ため、水分の吸収による伸びは避けられない事実であ
る。ところが、外側の紙層（３ｂ）は、上記と同質の紙
で形成されるものの、両紙層（３ａ）（３ｂ）間の合成
樹脂層（３ｃ）により外側紙層（３ｂ）への接着剤水分
の移行は防止されるので、外側紙層（３ｂ）は接着剤水
分の吸収による伸びは生じない。このため、基材側紙層
（３ａ）が伸びて浮き上がろうとするときに、外側紙層
（３ｂ）は圧縮方向に応力が発生して基材側紙層（３
ａ）の浮き上がりを抑制しようとする力が作用してい
る。にもかかわらず、浮き上がりが発生するのは、両紙
層（３ａ）（３ｂ）として、互いに同一の紙を使用して
いるため、両者間で物性に差がなく、基材側紙層（３
ａ）の浮き上がり力に対し、外側紙層（３ｂ）の浮き上
がり抑制力が十分に得られないからであることを究明し
た。First, the paper layers (3a) (3) of the three-layer sheet (3)
Since b) is composed of paper entangled with wood fibers, it is an unavoidable fact that elongation due to absorption of water is unavoidable. However, although the outer paper layer (3b) is formed of the same quality paper as the above, the adhesive water content on the outer paper layer (3b) is increased by the synthetic resin layer (3c) between both paper layers (3a) and (3b). Is prevented, so that the outer paper layer (3b) does not stretch due to absorption of adhesive moisture. Therefore, when the base material side paper layer (3a) stretches and tries to float, stress is generated in the compression direction in the outer side paper layer (3b), and the base material side paper layer (3a).
The force for suppressing the lifting of a) acts. Nevertheless, since the same paper is used as both paper layers (3a) and (3b), there is no difference in physical properties between both paper layers (3a) and (3b), and the paper layer (3)
It was clarified that the lifting force of the outer paper layer (3b) was not sufficiently obtained with respect to the lifting force of a).
【００１１】[0011]
【課題を解決するための手段】さらに本発明者は、鋭意
研究を続けた結果、外側紙層の曲げ変形性が、基材側紙
層のそれよりも小さいもの、あるいは外側紙層の剛性
が、基材側紙層のそれよりも高いものでは、外側紙層が
内側紙層の浮き上がりを抑制して、３層シートの浮き上
がりを防止できるということを見出だした。Further, as a result of continuing intensive studies, the present inventor has found that the bending deformability of the outer paper layer is smaller than that of the base material side paper layer or the rigidity of the outer paper layer. It has been found that the outer paper layer can suppress the lifting of the inner paper layer and prevent the lifting of the three-layer sheet at a higher level than that of the base material side paper layer.
【００１２】ところで、通常の材料において、曲げ荷重
が作用した場合、荷重面（内面）には圧縮応力が生じ、
反対面（外面）には引張応力が生じる。このとき、引張
破壊荷重が大きいものほど、特定の曲げ荷重に対する曲
げ変形量は小さくなるので、紙の場合でも、坪量を大き
くして厚みを増せば、引張破壊荷重を大きくできて、曲
げ変形量を小さくできることになる。By the way, in a normal material, when a bending load is applied, a compressive stress is generated on the load surface (inner surface),
Tensile stress is generated on the opposite surface (outer surface). At this time, the larger the tensile breaking load, the smaller the amount of bending deformation for a specific bending load, so even for paper, if the basis weight is increased and the thickness is increased, the tensile breaking load can be increased and the bending deformation can be increased. The amount can be reduced.
【００１３】そこで、本願第１の発明は、図１に示すよ
うに合成樹脂層（２３）の両面に紙層（２１）（２２）
が形成された３層シート（２０）が、板状基材（１０）
の裏面に貼着される建築用内装パネルにおいて、上記目
的を達成するため、前記３層シート（２０）の２つの紙
層（２１）（２２）のうち、外側の紙層（２２）を形成
する紙が、基材貼着側の紙層（２１）を形成する紙に対
し、相対的に坪量（ｇ／ｍ2 ）の大きいものにより構成
されてなることを要旨とするものである。Therefore, in the first invention of the present application, as shown in FIG. 1, the paper layers (21) and (22) are formed on both sides of the synthetic resin layer (23).
The three-layer sheet (20) on which is formed is the plate-shaped substrate (10).
In order to achieve the above-mentioned object, in the interior panel for construction stuck to the back surface of the above, the outer paper layer (22) is formed of the two paper layers (21) and (22) of the three-layer sheet (20). The gist of the present invention is that the paper to be used is composed of a paper having a relatively large basis weight (g / m 2 ) relative to the paper forming the paper layer (21) on the side of adhering the base material.
【００１４】すなわち、板状基材（１０）の裏面に接着
剤により貼着される３層シート（２０）において、外側
紙層（２２）の基材側紙層（２１）に対する密度（ｇ／
ｃｍ 3 ）が同等（０．７倍〜１．３倍程度）もしくはそ
れ以上の場合、引張強度（ｋｇ／ｃｍ2 ）が同等（０．
７５倍〜１．２５倍程度）もしくはそれ以上の場合、外
側紙層（２２）の坪量を、基材側紙層（２１）のそれよ
りも大きく設定するものである。That is, in the three-layer sheet (20) adhered to the back surface of the plate-shaped substrate (10) with an adhesive, the density (g / g) of the outer paper layer (22) with respect to the substrate-side paper layer (21).
cm 3 ) is equal (about 0.7 to 1.3 times) or more, the tensile strength (kg / cm 2 ) is equal (0.
(About 75 times to 1.25 times) or more, the basis weight of the outer side paper layer (22) is set to be larger than that of the base material side paper layer (21).
【００１５】このとき、外側紙層（２２）の坪量を、基
材側紙層（２１）の坪量に対し４０％以上大きく（１．
４倍以上に）設定することにより、３層シート（２０）
の浮き上がり防止効果を確実に得ることができる。At this time, the basis weight of the outer side paper layer (22) is larger than the basis weight of the base material side paper layer (21) by 40% or more (1.
3 layer sheet (20) by setting 4 times or more)
It is possible to reliably obtain the effect of preventing the floating.
【００１６】本発明において、例えば基材側紙層（２
１）としては、２０（ｇ／ｍ2 ）〜５０（ｇ／ｍ2 ）の
坪量の紙を使用でき、好ましくは２５（ｇ／ｍ2 ）〜３
５（ｇ／ｍ2 ）の坪量の紙を好適に使用できる。さら
に、外側紙層（２２）としては、上記したように基材側
紙層（２１）を構成する紙に対し坪量が４０％以上大き
い紙を使用するのが好ましい。なお外側紙層（２２）と
して、上記規定値より坪量の小さい紙を使用すると、３
層シート（２０）の浮き上がり防止を、確実に行えない
場合がある。In the present invention, for example, the base material side paper layer (2
As 1), a paper having a basis weight of 20 (g / m 2 ) to 50 (g / m 2 ) can be used, and preferably 25 (g / m 2 ) to 3
Paper having a basis weight of 5 (g / m 2 ) can be preferably used. Further, as the outer paper layer (22), it is preferable to use paper having a basis weight of 40% or more larger than that of the paper constituting the substrate side paper layer (21) as described above. If a paper having a grammage smaller than the specified value is used as the outer paper layer (22), it is 3
The layer sheet (20) may not be reliably prevented from rising.
【００１７】もっとも、この第１の発明においては、相
対的に、外側紙層（２２）の坪量が基材側紙層（２１）
の坪量よりも大きく設定されていれば良く、各紙層（２
１）（２２）のそれぞれの坪量は、特に限定されること
はない。In the first aspect of the invention, the basis weight of the outer paper layer (22) is relatively the base paper layer (21).
It is sufficient if it is set larger than the basis weight of each paper layer (2
The basis weights of 1) and (22) are not particularly limited.
【００１８】一方上記したように、外側紙層（２２）の
剛性を高めることによっても、３層シート（２０）の浮
き上がりを防止することが可能である。On the other hand, as described above, it is possible to prevent the three-layer sheet (20) from rising by increasing the rigidity of the outer paper layer (22).
【００１９】この場合、任意材料の剛性を示す指標とし
て曲げヤング率が周知であるので、外側紙層（２２）の
曲げヤング率が基材側紙層（２１）のそれよりも大きい
ものでは、３層シート（２０）の浮き上がりを防止でき
ると判断できる。In this case, since the bending Young's modulus is well known as an index showing the rigidity of an arbitrary material, if the bending Young's modulus of the outer paper layer (22) is larger than that of the base material side paper layer (21), It can be judged that the lifting of the three-layer sheet (20) can be prevented.
【００２０】しかし、紙層（２１）（２２）を構成する
紙のようなシート状物は、曲げテストを行うことができ
ず、実際に曲げヤング率を測定することは不可能であ
る。However, a sheet-like material such as paper constituting the paper layers (21) and (22) cannot be subjected to a bending test, and it is impossible to actually measure the bending Young's modulus.
【００２１】ところが、木材や、主として木材繊維の絡
み合いにより形成されるハードボード等のように、紙と
同質のものでは、曲げヤング係数と引張強さとの間に、
正の相関関係があると評価できるデータがある（「木材
工学辞典」工業出版、１９８２年５月２０日発行＜７７
３頁〜７７４頁、「ハードボードの物理的性質」の欄
＞、「木材工業ハンドブック」丸善、昭和５１年６月２
０日第２刷＜２３４頁、表２．１０１、「木材の性質」
の欄＞）。したがって、紙においても、引張強さの大き
いものは、曲げヤング率が大きくなり、剛性も高くなる
と判断できる。However, in the case of a material of the same quality as paper, such as wood or a hardboard mainly formed by entanglement of wood fibers, the bending Young's modulus and the tensile strength are
There is data that can be evaluated as having a positive correlation ("Wood Engineering Dictionary" Kogyo Publishing, published May 20, 1982 <77.
Pages 3 to 774, "Physical Properties of Hard Boards">, "Wood Industry Handbook" Maruzen, June 1976 2
2nd printing, 0th day <page 234, Table 2.101, “Wood properties”
Column>). Therefore, it can be judged that even a paper having a large tensile strength has a large bending Young's modulus and a high rigidity.
【００２２】そこで、本願第２の発明は、合成樹脂層
（２３）の両面に紙層（２１）（２２）が形成された３
層シート（２０）が、板状基材（１０）の裏面に貼着さ
れる建築用内装パネルにおいて、上記同目的を達成する
ため、前記３層シート（２０）の２つの紙層（２１）
（２２）のうち、外側の紙層（２２）を形成する紙が、
基材貼着側の紙層（２１）を形成する紙に対し、相対的
に引張強さ（ｋｇ／１５ｍｍ）の大きいものが使用され
てなることを要旨とするものである。Therefore, in the second invention of the present application, the paper layers (21) and (22) are formed on both sides of the synthetic resin layer (23).
In the interior panel for construction, where the layer sheet (20) is attached to the back surface of the plate-shaped substrate (10), in order to achieve the same purpose, two paper layers (21) of the three-layer sheet (20) are provided.
Of the (22), the paper forming the outer paper layer (22) is
The gist is that a paper having a relatively high tensile strength (kg / 15 mm) is used with respect to the paper forming the paper layer (21) on the side where the base material is attached.
【００２３】すなわち、板状基材（１０）の裏面に接着
剤により貼着される３層シート（２０）において、外側
紙層（２２）の基材側紙層（２１）に対する密度（ｇ／
ｃｍ 3 ）が同等（０．７倍〜１．３倍程度）もしくはそ
れ以上の場合、外側紙層（２２）の引張強さを、基材側
紙層（２１）のそれよりも大きく設定するものである。That is, in the three-layer sheet (20) attached to the back surface of the plate-shaped substrate (10) with an adhesive, the density (g / g) of the outer paper layer (22) with respect to the substrate-side paper layer (21).
cm 3 ) is equal (about 0.7 to 1.3 times) or more, the tensile strength of the outer paper layer (22) is set to be larger than that of the base material side paper layer (21). It is a thing.
【００２４】このとき、外側紙層（２２）の引張強さ
を、基材側紙層（２１）の引張強さに対し５５％以上大
きく（１．５５倍以上）に設定することにより、３層シ
ート（２０）の浮き上がり防止効果を確実に得ることが
できる。[0024] At this time, by setting the tensile strength of the outer paper layer (22), greater than 55% with respect to the tensile strength of the substrate-side paper layer (21) (on 1.55 more than double), The effect of preventing the three-layer sheet (20) from rising can be reliably obtained.
【００２５】ここで、本発明において「引張強さ（ｋｇ
／１５ｍｍ）」というのは、幅１５ｍｍ、長さ１５０ｍ
ｍ〜２００ｍｍの試験片に張力を加え、切断するときの
最大荷重（ｋｇ）を言う。Here, in the present invention, "tensile strength (kg
/ 15mm) "means a width of 15mm and a length of 150m
The maximum load (kg) when applying tension to a test piece of m to 200 mm and cutting it.
【００２６】この第２の発明においては、相対的に、外
側紙層（２２）の引張強さが基材側紙層（２１）の引張
強さよりも大きく設定されていれば良く、両紙層（２
１）（２２）のそれぞれの引張強さは特に限定されるも
のではない。In the second aspect of the present invention, the tensile strength of the outer paper layer (22) may be set to be relatively larger than the tensile strength of the base material side paper layer (21). Two
The tensile strengths of 1) and 22) are not particularly limited.
【００２７】また本発明においては、第１発明の構成と
第２発明の構成とを共に満足することにより、相乗的効
果を発揮することができる。例えば外側紙層（２２）の
引張強さを、基材側紙層（２１）の引張強さに対し５５
％以上大きく設定した上で、さらに外側紙層（２２）の
坪量を、基材側紙層（２１）の坪量に対し４０％以上大
きく設定することにより、３層シート（２０）の浮き上
がり防止効果を、より確実に得ることができる。In the present invention, the synergistic effect can be exhibited by satisfying both the constitution of the first invention and the constitution of the second invention. For example, the tensile strength of the outer paper layer (22) is 55 with respect to the tensile strength of the base material side paper layer (21).
%, And further, by setting the basis weight of the outer side paper layer (22) to be 40% or more larger than the basis weight of the base material side paper layer (21), the three-layer sheet (20) rises. The prevention effect can be obtained more reliably.
【００２８】一方、本発明においては、基材側紙層（２
１）として、吸水伸び率の小さいものを使用することに
より、上記の効果を、より一層、確実に得ることができ
る。例えば基材側紙層（２１）として、吸水伸び率が、
３％以下のものを使用するのが好ましい。On the other hand, in the present invention, the base paper layer (2
By using a material having a low water absorption elongation rate as 1), the above effects can be more reliably obtained. For example, as the substrate side paper layer (21), the water absorption elongation is
It is preferable to use those of 3% or less.
【００２９】本発明において、３層シート（２０）の紙
層（２１）（２２）を構成する紙としては、クラフト
紙、再生紙、古紙含有紙、純白ロール紙、印刷用紙、板
紙等を使用でき、中でも外側紙層（２２）をクラフト
紙、基材側紙層（２１）を純白ロール紙により構成した
ものは、好適に使用することができる。In the present invention, as the paper constituting the paper layers (21) and (22) of the three-layer sheet (20), kraft paper, recycled paper, waste paper containing paper, pure white roll paper, printing paper, paperboard, etc. are used. Among them, the outer paper layer (22) made of kraft paper and the base material side paper layer (21) made of pure white roll paper can be preferably used.
【００３０】なお、紙層（２１）（２２）を構成する紙
は、その抄造方向がいずれの方向に設定されてもよく、
例えば抄造方向がパネル長さ方向に設定されるようにし
ても、パネル幅方向に設定されるようにしても良い。さ
らに各紙層（２１）（２２）の抄造方向が互いに一致す
るようにしても、異なるようにしても良い。The paper forming the paper layers (21) and (22) may have any papermaking direction.
For example, the papermaking direction may be set in the panel length direction or may be set in the panel width direction. Further, the papermaking directions of the paper layers (21) and (22) may be the same or different from each other.
【００３１】３層シート（２０）のうち、合成樹脂層
（２３）としては、水分、湿気を遮断できるものであれ
ばどのようなもので構成されていても良い。例えばポリ
エチレン、ポリプロピレン、ポリ塩化ビニル等の熱溶融
性樹脂、熱変形性樹脂、熱可塑性樹脂等によって構成さ
れるものを好適に使用することができる。In the three-layer sheet (20), the synthetic resin layer (23) may be made of any material as long as it can block moisture and humidity. For example, those made of a heat-melting resin such as polyethylene, polypropylene, or polyvinyl chloride, a heat-deformable resin, a thermoplastic resin can be preferably used.
【００３２】さらに合成樹脂層（２３）は、厚さを、１
０μｍ〜１００μｍ、好ましくは１５μｍ〜５０μｍに
設定するのが良い。この厚さが薄くなるにしたがって、
合成樹脂層（２３）と両紙層（２１）（２２）との接着
性が低下し、１０μｍよりも薄くなると、両紙層（２
１）（２２）が剥離しやすくなり、３層シートとして十
分な安定性を得ることができない恐れがあり、しかも合
成樹脂層（２３）に、ピンホールが多く形成されて、十
分な防水、防湿性を得ることができない恐れがあり、好
ましくない。また合成樹脂層（２３）の厚さが１００μ
ｍを越えても、それに見合うだけの効果が得られず、不
経済となり、好ましくない。もっとも、合成樹脂層（２
３）の厚さが厚くなればなるほど、剛性が増すので、３
層シートの浮き上がりを抑制する効果が向上することに
はなる。Further, the synthetic resin layer (23) has a thickness of 1
It is set to 0 μm to 100 μm, preferably 15 μm to 50 μm. As this thickness becomes thinner,
When the adhesiveness between the synthetic resin layer (23) and both paper layers (21) and (22) deteriorates and becomes less than 10 μm, both paper layers (2
1) (22) may be easily peeled off and sufficient stability may not be obtained as a three-layer sheet, and moreover, many pinholes are formed in the synthetic resin layer (23), resulting in sufficient waterproofness and moisture resistance. It is not preferable because the property may not be obtained. Further, the thickness of the synthetic resin layer (23) is 100 μm.
Even if it exceeds m, the effect corresponding to it cannot be obtained, which is uneconomical, which is not preferable. However, the synthetic resin layer (2
As the thickness of 3) increases, the rigidity increases, so 3
The effect of suppressing the lifting of the layered sheet is improved.
【００３３】また３層シート（２０）の形成方法として
は、各層（２１）（２３）（２２）を構成する各シート
物を積層した後、加熱圧着して熱融着する方法、あるい
は熱溶融状態の合成樹脂をシート状またはフィルム状に
吐出させ、その吐出樹脂の両面に、紙層（２１）（２
２）を構成する紙を重ね合わせて、脱気ロール、圧縮ロ
ールにて冷圧することにより、ラミネートする方法等を
採用できる。The three-layer sheet (20) may be formed by laminating the sheets constituting the layers (21), (23) and (22), followed by thermocompression and heat fusion, or by heat fusion. The synthetic resin in the state is discharged in the form of a sheet or film, and the paper layer (21) (2
It is possible to adopt a method in which the papers constituting 2) are superposed and laminated by cold pressing with a deaeration roll or a compression roll.
【００３４】基材（１０）としては、合板、中質繊維板
（ＭＤＦ）、パーティクルボード、無機質板等を使用で
きる。中でも中質繊維板は、木材繊維からなり、材質も
均一で、方向性がないので、床材等の化粧パネル用基材
として好適に使用できる。As the base material (10), plywood, medium quality fiberboard (MDF), particle board, inorganic board and the like can be used. Among them, the medium-quality fiberboard is made of wood fibers, has a uniform material, and has no directivity, and thus can be suitably used as a base material for a decorative panel such as a flooring material.
【００３５】３層シート（２０）を基材（１０）に貼着
するための接着剤としては、尿素系、尿素メラニン系、
酢酸ビニル系、エチレン酢酸ビニル系、尿素酢酸ビニル
系、フェノール系、塩化ビニル系、水性ビニルウレタン
系、ウレタン系のもの等の公知の接着剤を好適に使用す
ることができる。Adhesives for sticking the three-layer sheet (20) to the base material (10) include urea type, urea melanin type,
Known adhesives such as vinyl acetate-based, ethylene vinyl acetate-based, urea vinyl acetate-based, phenol-based, vinyl chloride-based, water-based vinyl urethane-based and urethane-based adhesives can be preferably used.
【００３６】一方、第１または第２の発明においては、
共に、基材（１０）に化粧層（３０）が設けられてなる
構成を採用するのが好ましい。On the other hand, in the first or second invention,
Both preferable to employ a comprising decorative layer on a substrate (10) (30) provided configuration.
【００３７】化粧層（３０）は、単板、樹脂シート、印
刷紙等、周知の化粧用シートを貼着することにより形成
できるほか、周知の化粧用塗料を塗装することにより形
成することも可能である。The decorative layer (30) can be formed by sticking a known decorative sheet such as a veneer, a resin sheet, or a printing paper, or can be formed by applying a known cosmetic paint. Is.
【００３８】[0038]
【作用】本願第１の発明においては、基材裏面に貼着さ
れる３層シートの両側２つの紙層のうち、外側の紙層を
形成する紙が、基材貼着側の紙層を形成する紙に対し、
相対的に坪量の大きいものにより構成されるため、外側
紙層の曲げ変形量が基材側紙層のそれに比べて小さくな
る。このため、基材側紙層が接着剤水分の吸収により伸
びて部分的に浮き上がろうとしても、外側紙層によって
その浮き上がりが抑制されるので、３層シートの浮き上
がりが防止される。In the first aspect of the present invention, of the two paper layers on both sides of the three-layer sheet attached to the back surface of the base material, the paper forming the outer paper layer is the paper layer on the base material attachment side. For the paper to be formed,
Since the outer paper layer has a relatively large basis weight, the amount of bending deformation of the outer paper layer is smaller than that of the base paper layer. Therefore, even if the base material side paper layer is stretched due to the absorption of the adhesive moisture and tries to be partially lifted, the outer paper layer suppresses the lifting, so that the lifting of the three-layer sheet is prevented.
【００３９】本願第２の発明においては、基材裏面に貼
着される３層シートの両側２つの紙層のうち、外側の紙
層を形成する紙が、基材貼着側の紙層を形成する紙に対
し、相対的に引張強さの大きいものにより構成されるた
め、外側紙層の剛性が基材側紙層のそれに比べて大きく
なる。このため、基材側紙層が接着剤水分の吸収により
伸びて部分的に浮き上がろうとしても、外側紙層によっ
てその浮き上がりが抑制されるので、３層シートの浮き
上がりが防止される。In the second invention of the present application, of the two paper layers on both sides of the three-layer sheet attached to the back surface of the base material, the paper forming the outer paper layer is the paper layer on the base material attachment side. Since the paper to be formed is made of a material having a relatively high tensile strength, the rigidity of the outer paper layer is higher than that of the base material side paper layer. Therefore, even if the base material side paper layer is stretched due to the absorption of the adhesive moisture and tries to be partially lifted, the outer paper layer suppresses the lifting, so that the lifting of the three-layer sheet is prevented.
【００４０】本願第１または第２の発明において、基材
の表面に化粧層が設けられてなる構成を採用する場合に
は、化粧床材等のパネル製品としてそのまま使用できる
ものとなる。In the first or second invention of the present application, when the constitution in which the decorative layer is provided on the surface of the base material is adopted, it can be used as it is as a panel product such as a decorative flooring material.
【００４１】[0041]
【実施例】以下、本発明に関連した実施例、およびその
効果を導出するための比較例について説明する。EXAMPLES Examples related to the present invention and comparative examples for deriving the effects thereof will be described below.
【００４２】＜実施例１＞<Example 1>
【００４３】[0043]
【表１】 [Table 1]
【００４４】上表１に示すように、ポリエチレンからな
る厚さ１５μｍの合成樹脂層の両側に、坪量３０（ｇ／
ｍ2 ）、厚さ４６μｍの紙からなる基材側紙層と、坪量
５０（ｇ／ｍ2 ）、厚さ７５μｍの紙からなる外側紙層
とが形成された坪量９５（ｇ／ｍ2 ）、厚さ１１７μｍ
の３層シートを、中質繊維板（ＭＤＦ）からなる厚さ
５．５（ｍｍ）の基材の裏面に、尿素酢酸ビニル系接着
剤を用いて貼着し、床材基板を作製した。As shown in Table 1 above, the basis weight of 30 (g / g) is provided on both sides of a synthetic resin layer made of polyethylene and having a thickness of 15 μm.
m 2 ), a base material side paper layer made of paper having a thickness of 46 μm, and an outer paper layer made of paper having a basis weight of 50 (g / m 2 ) and a thickness of 75 μm, and a basis weight of 95 (g / m 2 2 ), thickness 117μm
The three-layer sheet of No. 3 was attached to the back surface of a 5.5 mm thick substrate made of a medium-quality fiberboard (MDF) using a urea vinyl acetate adhesive to prepare a flooring substrate.
【００４５】なおこの実施例１、並びに以下の各実施例
および各比較例においては、紙層を構成する紙は、密度
がすべて０．６５（ｇ／ｃｍ 3 ）〜０．８５（ｇ／ｃｍ
3 ）である。In this Example 1 and each of the following Examples and Comparative Examples, the density of the paper constituting the paper layer is 0.65 (g / cm 3 ) to 0.85 (g / cm 3 ).
3 )
【００４６】＜実施例２＞
同表１に示すように、ポリエチレン層の両側に、坪量５
０（ｇ／ｍ2 ）、厚さ７５μｍの紙からなる基材側紙層
と、坪量７１（ｇ／ｍ2 ）、厚さ９０μｍの紙からなる
外側紙層とが形成された坪量１３５（ｇ／ｍ2 ）、厚さ
１５５μｍの３層シートを、ＭＤＦ基材の裏面に、上記
と同様の接着剤を用いて貼着し、床材基板を作製した。Example 2 As shown in Table 1, the polyethylene layer has a basis weight of 5 on both sides.
Basis weight 135 in which a base material side paper layer made of paper having a thickness of 0 (g / m 2 ) and a thickness of 75 μm and an outer paper layer made of paper having a basis weight of 71 (g / m 2 ) and a thickness of 90 μm are formed. A three-layer sheet (g / m 2 ) having a thickness of 155 μm was attached to the back surface of the MDF substrate using the same adhesive as the above to prepare a flooring substrate.
【００４７】＜実施例３＞
同表１に示すように、ポリエチレン層の両側に、坪量３
０（ｇ／ｍ2 ）、厚さ４６μｍの紙からなる基材側紙層
と、坪量７１（ｇ／ｍ2 ）、厚さ９０μｍの紙からなる
外側紙層とが形成された坪量１１６（ｇ／ｍ2 ）、厚さ
１３１μｍの３層シートを、ＭＤＦ基材の裏面に、上記
と同様の接着剤を用いて貼着し、床材基板を作製した。<Example 3> As shown in Table 1, both sides of the polyethylene layer had a basis weight of 3
Basis weight 116 in which a base material side paper layer made of paper having a thickness of 0 (g / m 2 ) and a thickness of 46 μm and an outer side paper layer made of paper having a basis weight of 71 (g / m 2 ) and a thickness of 90 μm are formed. A three-layer sheet (g / m 2 ) having a thickness of 131 μm was attached to the back surface of the MDF substrate using the same adhesive as the above to prepare a flooring substrate.
【００４８】＜比較例１＞
同表１に示すように、ポリエチレンからなる厚さ１５μ
ｍの合成樹脂層の両側に、坪量５０（ｇ／ｍ2 ）、厚さ
７５μｍの紙からなる基材側紙層と、坪量５０（ｇ／ｍ
2 ）、厚さ７５μｍの紙からなる外側紙層とが形成され
た坪量１１４（ｇ／ｍ2 ）、厚さ１４２μｍの３層シー
トを、ＭＤＦからなる５．５ｍｍ厚の基材の裏面に、上
記と同様の接着剤を用いて貼着し、床材基板を作製し
た。<Comparative Example 1> As shown in Table 1, a thickness of polyethylene is 15 μm.
On both sides of the m synthetic resin layer, a base material side paper layer made of paper having a basis weight of 50 (g / m 2 ) and a thickness of 75 μm, and a basis weight of 50 (g / m 2 )
2 ), a 3-layer sheet having a basis weight of 114 (g / m 2 ) and a thickness of 142 μm and an outer paper layer made of paper having a thickness of 75 μm is formed on the back surface of a 5.5 mm-thick base material made of MDF. Then, the same adhesive as above was used to bond the substrates to produce a flooring substrate.
【００４９】＜評価１＞
上記の各床材基板に対し、裏面側（３層シート側）にお
ける浮き上がりに起因する皺の発生状況を観察し、皺が
観察されないものを「優良」、多少の皺は観察されるが
製品上支障のないものを「良好」、皺が多数観察され製
品上支障のあるものを「不良」として３段階で評価し
た。その評価結果を同表に示す。なお、参考までに、基
材側紙層に対する外側紙層の坪量の比を、同表に合わせ
て示す。<Evaluation 1> For each of the above flooring substrates, the generation of wrinkles due to the lifting on the back surface side (three-layer sheet side) was observed, and when no wrinkles were observed, "excellent", some wrinkles were observed. Was evaluated as "good" when there was no problem in the product and "bad" when many wrinkles were observed and evaluated as "poor". The evaluation results are shown in the same table. For reference, the ratio of the basis weight of the outer paper layer to the base material paper layer is also shown in the same table.
【００５０】上表から明らかなように、実施例１〜３で
は、ほとんど皺のない良好な床材基板を作製でき、中で
も坪量比の大きい実施例１、３では全く皺のない優れた
床材基板を作製できた。これに対し、比較例１では、多
数皺のある不良の床材基板しか作製し得なかった。As is clear from the above table, in Examples 1 to 3, a good flooring substrate having almost no wrinkles can be prepared, and in Examples 1 and 3 having a large grammage ratio, excellent flooring having no wrinkles. The material substrate could be produced. On the other hand, in Comparative Example 1, only a defective flooring substrate having many wrinkles could be produced.
【００５１】なお上記実施例１〜３および比較例１にお
いて、基材としてＭＤＦに換えて合板を使用し、上記と
同様に床材基板を作製して評価したところ、上記と同様
の結果が得られた。In Examples 1 to 3 and Comparative Example 1 described above, plywood was used instead of MDF as the base material, and a flooring substrate was prepared and evaluated in the same manner as above, and the same results as above were obtained. Was given.
【００５２】＜実施例４＞<Example 4>
【００５３】[0053]
【表２】 [Table 2]
【００５４】上表２に示すように、ポリエチレンからな
る厚さ２０μｍの合成樹脂層の両側に、引張強さ２．７
（ｋｇ／１５ｍｍ）の紙からなる基材側紙層と、引張強
さ５．０（ｋｇ／１５ｍｍ）の紙からなる外側紙層とが
形成された３層シートを、ＭＤＦからなる５．５ｍｍ厚
の基材の裏面に、尿素酢酸ビニル系接着剤を用いて貼着
し、床材基板を作製した。As shown in Table 2 above, a tensile strength of 2.7 was applied to both sides of a 20 μm thick synthetic resin layer made of polyethylene.
(Kg / 15 mm) Paper side base material paper layer and tensile strength 5.0 (kg / 15 mm) Paper outer side paper layer formed 3 layer sheet, MDF 5.5 mm A flooring substrate was produced by sticking the urea vinyl acetate adhesive to the back surface of the thick base material.
【００５５】＜実施例５＞
同表２に示すように、ポリエチレン層の両側に、引張強
さ１．６（ｋｇ／１５ｍｍ）の紙からなる基材側紙層
と、引張強さ２．７（ｋｇ／１５ｍｍ）の紙からなる外
側紙層とが形成された３層シートを、ＭＤＦ基材の裏面
に、上記と同様の接着剤を用いて貼着し、床材基板を作
製した。<Example 5> As shown in the same Table 2, a base material side paper layer made of paper having a tensile strength of 1.6 (kg / 15 mm) and a tensile strength of 2.7 on both sides of the polyethylene layer. A three-layer sheet on which an outer side paper layer made of (kg / 15 mm) paper was formed was attached to the back surface of the MDF substrate using the same adhesive as above to prepare a flooring substrate.
【００５６】＜実施例６＞
同表２に示すように、ポリエチレン層の両側に、引張強
さ１．６（ｋｇ／１５ｍｍ）の紙からなる基材側紙層
と、引張強さ５．５（ｋｇ／１５ｍｍ）の紙からなる外
側紙層とが形成された３層シートを、ＭＤＦ基材の裏面
に、上記と同様の接着剤を用いて貼着し、床材基板を作
製した。Example 6 As shown in Table 2, a base material side paper layer made of paper having a tensile strength of 1.6 (kg / 15 mm) and a tensile strength of 5.5 on both sides of the polyethylene layer. A three-layer sheet on which an outer side paper layer made of (kg / 15 mm) paper was formed was attached to the back surface of the MDF substrate using the same adhesive as above to prepare a flooring substrate.
【００５７】＜比較例２＞
同表２に示すように、ポリエチレンからなる厚さ２０μ
ｍの合成樹脂層の両側に、引張強さ５．０（ｋｇ／１５
ｍｍ）の紙からなる基材側紙層と、引張強さ５．０（ｋ
ｇ／１５ｍｍ）の紙からなる外側紙層とが形成された３
層シートを、ＭＤＦからなる５．５ｍｍ厚の基材の裏面
に、上記と同様の接着剤を用いて貼着し、床材基板を作
製した。<Comparative Example 2> As shown in Table 2, the thickness of polyethylene is 20 μm.
The tensile strength of 5.0 (kg / 15
(mm) paper base material side paper layer and tensile strength 5.0 (k
g / 15 mm) and an outer paper layer made of paper 3
The layered sheet was attached to the back surface of a 5.5 mm-thick base material made of MDF using the same adhesive as described above to prepare a flooring substrate.
【００５８】＜評価２＞
上記実施例４〜６および比較例２の床材基板に対し、上
記と同様な評価を行った。その結果を同様２に示す。な
お、参考までに、基材側紙層に対する外側紙層の引張強
さの比、各紙層の坪量、基材側紙層に対する外側紙層の
坪量の比を同表に合わせて示す。<Evaluation 2> For the flooring substrates of Examples 4 to 6 and Comparative Example 2, the same evaluations as above were performed. The result is also shown in 2. For reference, the ratio of the tensile strength of the outer paper layer to the base material side paper layer, the basis weight of each paper layer, and the ratio of the basis weight of the outer side paper layer to the base material side paper layer are also shown in the same table.
【００５９】上表から明らかなように、実施例４〜６で
は、全く皺のない優れた床材基板を作製できた。これに
対し、比較例２では、多数皺のある不良の床材基板しか
作製し得なかった。As is clear from the above table, in Examples 4 to 6, excellent flooring substrates having no wrinkles could be produced. On the other hand, in Comparative Example 2, only a defective flooring substrate having many wrinkles could be produced.
【００６０】＜実施例７＞<Example 7>
【００６１】[0061]
【表３】 [Table 3]
【００６２】上表３に示すように、ポリエチレンからな
る厚さ１５μｍの合成樹脂層の両側に、引張強さ５．５
（ｋｇ／１５ｍｍ）の紙からなる基材側紙層と、引張強
さ８．５（ｋｇ／１５ｍｍ）の紙からなる外側紙層とが
形成された３層シートを、合板からなる５．５ｍｍ厚の
基材の裏面に、尿素酢酸ビニル系接着剤を用いて貼着
し、床材基板を作製した。As shown in Table 3 above, a tensile strength of 5.5 was obtained on both sides of a 15 μm thick synthetic resin layer made of polyethylene.
(Kg / 15 mm) Paper side base material paper layer and tensile strength 8.5 (kg / 15 mm) paper outer side paper layer formed 3 layer sheet, 5.5 mm plywood A flooring substrate was produced by sticking the urea vinyl acetate adhesive to the back surface of the thick base material.
【００６３】＜実施例８＞
同表３に示すように、ポリエチレン層の両側に、引張強
さ２．７（ｋｇ／１５ｍｍ）の紙からなる基材側紙層
と、引張強さ５．５（ｋｇ／１５ｍｍ）の紙からなる外
側紙層とが形成された３層シートを、合板基材の裏面
に、上記と同様の接着剤を用いて貼着し、床材基板を作
製した。Example 8 As shown in Table 3, a base material side paper layer made of paper having a tensile strength of 2.7 (kg / 15 mm) and a tensile strength of 5.5 on both sides of the polyethylene layer. A three-layer sheet on which an outer paper layer made of (kg / 15 mm) paper was formed was attached to the back surface of the plywood base material using the same adhesive as described above to prepare a flooring substrate.
【００６４】＜比較例３＞
同表３に示すように、ポリエチレンからなる厚さ１５μ
ｍの合成樹脂層の両側に、引張強さ２．７（ｋｇ／１５
ｍｍ）の紙からなる基材側紙層と、引張強さ２．７（ｋ
ｇ／１５ｍｍ）の紙からなる外側紙層とが形成された３
層シートを、合板からなる５．５ｍｍ厚の基材の裏面
に、上記と同様の接着剤を用いて貼着し、床材基板を作
製した。<Comparative Example 3> As shown in Table 3, polyethylene having a thickness of 15 μm
tensile strength of 2.7 (kg / 15) on both sides of the synthetic resin layer of m.
(mm) paper base material side paper layer and tensile strength 2.7 (k)
g / 15 mm) and an outer paper layer made of paper 3
The layered sheet was attached to the back surface of a 5.5 mm-thick base material made of plywood using the same adhesive as the above to prepare a flooring substrate.
【００６５】＜評価３＞
上記実施例７、８および比較例３の床材基板に対し、上
記と同様な評価を行った。その結果を同表３に示す。な
お、参考までに、基材側紙層に対する外側紙層の引張強
さの比、各紙層の坪量、基材側紙層に対する外側紙層の
坪量の比を同表に合わせて示す。<Evaluation 3> The floor material substrates of Examples 7 and 8 and Comparative Example 3 were evaluated in the same manner as above. The results are shown in Table 3 below. For reference, the ratio of the tensile strength of the outer paper layer to the base material side paper layer, the basis weight of each paper layer, and the ratio of the basis weight of the outer side paper layer to the base material side paper layer are also shown in the same table.
【００６６】上表から明らかなように、実施例７、８で
は、ほとんど皺のない良好な床材基板を作製でき、中で
も引張強さの比の大きい実施例８では、全く皺のない優
れた床材基板を作製できた。これに対し、比較例３で
は、多数皺のある不良の床材基板しか作製し得なかっ
た。As is clear from the above table, in Examples 7 and 8, a good flooring substrate having almost no wrinkles could be produced, and in Example 8 having a large tensile strength ratio, there was no wrinkles at all. A flooring substrate could be produced. On the other hand, in Comparative Example 3, only a defective flooring substrate having many wrinkles could be produced.
【００６７】[0067]
【発明の効果】以上のように、本願第１の発明の建築用
内装パネルによれば、基材裏面に貼着される３層シート
の両側２つの紙層のうち、外側の紙層を形成する紙が、
基材貼着側の紙層を形成する紙に対し、相対的に坪量の
大きいものにより構成されるため、外側紙層の曲げ変形
量が基材側紙層のそれに比べて小さくなる。このため、
基材側紙層が接着剤水分の吸収により伸びて部分的に浮
き上がろうとしても、外側紙層によってその浮き上がり
が抑制されて、３層シートの浮き上がりが防止される。
したがって、パネル裏面に３層シートの折れ曲がりや皺
等が形成されるのを防止でき、防水、防湿性の低下およ
び商品価値の低下等を防止できるという効果が得られ
る。As described above, according to the building interior panel of the first invention of the present application, the outer paper layer is formed out of the two paper layers on both sides of the three-layer sheet attached to the back surface of the base material. The paper
The amount of bending deformation of the outer paper layer is smaller than that of the paper sheet on the base material side because the paper material forming the paper layer on the base material adhering side is made of paper having a relatively large basis weight. For this reason,
Even if the base material side paper layer is stretched due to the absorption of moisture of the adhesive and tries to partially float, the outer paper layer suppresses the floating and prevents the three-layer sheet from floating.
Therefore, it is possible to prevent bending and wrinkles of the three-layer sheet from being formed on the back surface of the panel, and it is possible to obtain the effects of preventing deterioration of waterproofness and moisture resistance and deterioration of commercial value.
【００６８】本願第２の発明の建築用内装パネルによれ
ば、基材裏面に貼着される３層シートの両側２つの紙層
のうち、の外側の紙層を形成する紙が、基材貼着側の紙
層を形成する紙に対し、相対的に引張強さの大きいもの
により構成されるため、外側紙層の剛性が基材側の紙層
のそれに比べて大きくなる。このため、基材側紙層が接
着剤水分の吸収により伸びて部分的に浮き上がろうとし
ても、外側紙層によってその浮き上がりが抑制されるの
で、３層シートの浮き上がりが防止され、上記と同様な
効果が得られる。According to the building interior panel of the second invention of the present application, the paper forming the outer paper layer of the two paper layers on both sides of the three-layer sheet attached to the back surface of the base material is the base material. The outer paper layer has a higher rigidity than that of the paper layer on the substrate side because it is made of a material having a relatively high tensile strength with respect to the paper forming the paper layer on the attachment side. Therefore, even if the base material side paper layer stretches due to the absorption of the adhesive moisture and tries to partly float, the outer paper layer suppresses the lifting, so that the lifting of the three-layer sheet is prevented. Similar effects are obtained.
【００６９】本願第１または第２の発明において、基材
の表面に化粧層が設けられてなる構成を採用する場合に
は、化粧床材等のパネル製品としてそのまま使用できる
という利点がある。In the first or second invention of the present application, when the constitution in which the decorative layer is provided on the surface of the base material is adopted, there is an advantage that it can be used as it is as a panel product such as a decorative flooring material.
【図１】この発明の一例の建築用内装パネルが適用され
た化粧床材を示す断面図である。FIG. 1 is a cross-sectional view showing a decorative flooring to which an architectural interior panel of an example of the present invention is applied.
【図２】従来の床材基板を示す断面図であって、同図
（ａ）は圧締工程前の状態を示す断面図、同図（ｂ）は
圧締工程後の状態を示す断面図である。2A and 2B are cross-sectional views showing a conventional flooring substrate, wherein FIG. 2A is a cross-sectional view showing a state before a pressing process, and FIG. 2B is a cross-sectional view showing a state after the pressing process. Is.
１０…基材 ２０…３層シート ２１…基材側紙層 ２２…外側紙層 ２３…合成樹脂層 ３０…化粧層 10 ... Base material 20 ... 3-layer sheet 21 ... Paper layer on the base material side 22 ... Outer paper layer 23 ... Synthetic resin layer 30 ... Makeup layer
Claims (4)
層シートが、板状基材の裏面に貼着される建築用内装パ
ネルにおいて、 前記３層シートの２つの紙層のうち、外側の紙層を形成
する紙が、基材貼着側の紙層を形成する紙に対し、相対
的に坪量の大きいものにより構成され、 前記外側の紙層の坪量が、前記基材貼着側の紙層の坪量
に対し４０％以上大きく設定され てなることを特徴とす
る建築用内装パネル。1. A paper layer formed on both sides of a synthetic resin layer.
In a building interior panel in which a layered sheet is attached to the back surface of a plate-shaped base material, in the two paper layers of the three-layered sheet, the paper forming the outer paper layer is the paper on the base material attachment side. to the paper to form a layer, it is constituted by having a large relative basis weight, the basis weight of the outer paper layer, a basis weight of the substrate bonded callee paper layer
The interior panel for construction is characterized by being set 40% or more larger than the above .
る請求項１記載の建築用内装パネル。2. The interior panel for architecture according to claim 1, wherein a decorative layer is provided on the surface of the base material.
層シートが、板状基材の裏面に貼着される建築用内装パ
ネルにおいて、 前記３層シートの２つの紙層のうち、外側の紙層を形成
する紙が、基材貼着側の紙層を形成する紙に対し、相対
的に引張強さの大きいものにより構成され、 前記外側の紙層の引張強さが、前記基材貼着側の紙層の
引張強さに対し５５％以上大きく設定され てなることを
特徴とする建築用内装パネル。3. A paper layer is formed on both sides of a synthetic resin layer.
In a building interior panel in which a layered sheet is attached to the back surface of a plate-shaped base material, in the two paper layers of the three-layered sheet, the paper forming the outer paper layer is the paper on the base material attachment side. to the paper to form a layer, formed of a larger relatively tensile strength, tensile strength of the outer paper layer of the substrate bonded callee paper layer
An interior panel for architecture, which is characterized by being set to be 55% or more larger than the tensile strength .
る請求項３記載の建築用内装パネル。4. The interior panel for architecture according to claim 3, wherein a decorative layer is provided on the surface of the base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26893294A JP3453440B2 (en) | 1994-11-01 | 1994-11-01 | Architectural interior panels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26893294A JP3453440B2 (en) | 1994-11-01 | 1994-11-01 | Architectural interior panels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08127105A JPH08127105A (en) | 1996-05-21 |
| JP3453440B2 true JP3453440B2 (en) | 2003-10-06 |
Family
ID=17465291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26893294A Expired - Fee Related JP3453440B2 (en) | 1994-11-01 | 1994-11-01 | Architectural interior panels |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3453440B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006348585A (en) * | 2005-06-16 | 2006-12-28 | Noda Corp | Building underlying member |
-
1994
- 1994-11-01 JP JP26893294A patent/JP3453440B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08127105A (en) | 1996-05-21 |
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