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JP3841948B2 - Warp prevention - Google Patents
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JP3841948B2 - Warp prevention - Google Patents

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Publication number
JP3841948B2
JP3841948B2 JP36714597A JP36714597A JP3841948B2 JP 3841948 B2 JP3841948 B2 JP 3841948B2 JP 36714597 A JP36714597 A JP 36714597A JP 36714597 A JP36714597 A JP 36714597A JP 3841948 B2 JP3841948 B2 JP 3841948B2
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Japan
Prior art keywords
paper
core material
corrugated
moisture
synthetic resin
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JP36714597A
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Japanese (ja)
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JPH11182145A (en
Inventor
直人 中村
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Dai Nippon Printing Co Ltd
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Dai Nippon Printing Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、部屋の間仕切り、押入れと部屋との仕切り等として使用される襖に関する。
【0002】
【従来の技術】
従来、木の格子を骨組みとしたり、ハニカム構造をしたコア材を芯材とし、両面に石膏原紙、襖紙、段ボール紙などの表装紙を貼った襖が知られている。この種の襖は、敷居と鴨居との間に立てて、部屋の仕切り、押入れとの仕切りとして使用されている。ところが、この種の襖では、襖の両側の温度、湿度が異なると、芯材を構成する木やハニカム構造をしたコア材の熱膨張により一方に反ってしまう。また、木やコア材は多孔質であるので、片面から湿気を吸って反ることもあり、このように襖が反ると襖の開け閉めが非常に困難になっていた。
【0003】
これを防止するために芯材と表面の襖紙との間に、鉄箔、アルミ箔等の金属箔を貼着することが試みられている。しかし、このような金属箔を貼ったものは、古くなり廃棄する際に、金属箔と他の部分を分別することが難しく、そのまま焼却処理に付した時に金属箔が焼却炉の中で塊状になって炉を傷めるため、処分が困難になってきており、またエマルジョン系接着剤等に含まれる水分や芯材に含まれる水分により金属箔の腐蝕が生じ接着強度が低下する等の問題があり、貼合せに溶剤型の接着剤を用いねばならないため、火気に対して安全で臭気がないエマルジョン型接着剤を用いることが出来ず、価格的にも高価になりがちである。
【0004】
【発明が解決しようとする課題】
そこで、本発明は上記のような問題点を解決する為になされたもので、反りが殆ど生ぜず、しかも軽量で、その上廉価に製造することが出来る襖を提供するものである。
【0005】
【課題を解決するための手段】
上記目的を達成するための本発明の解決手段は、2枚の段ボール製襖紙を芯材の両側に貼合せた襖において、前記段ボール製襖紙が2枚のそれぞれ坪量23〜50g/m 2 薄葉紙を熱可塑性合成樹脂の押出しコート層を介して積層してなる紙質系防湿シートを波状中芯材の両面に貼着したものであることを特徴とする反り防止襖とすることである。この構成とすることによって、波状中芯材と芯材の間の水分の移動及び波状中芯材と外気の間の水分の移動が阻止され、従って襖の表裏両側の外気に温度差、湿度差があっても反りを生じることがない襖とすることが可能である。また、熱可塑性合成樹脂の押出しコート層からなる防湿層の両面が薄葉紙で覆われているので、薄葉紙が接着剤をほどよく吸収し、波状中芯材や芯材との接着が容易となり、火気に対して安全で、臭気がない、価格的にも安価なエマルジョン型接着剤を使用して良好な接着強度を発揮する。
【0006】
また、2枚の段ボール製襖紙を芯材の両側に貼合した襖において、前記段ボール製襖紙の芯材と反対側に位置する面に絵柄層が形成されていることを特徴とするものである。こうすることによって意匠性に優れたものとなる。また襖の表面の化粧シートの張り替えが容易である。
【0007】
また、少なくとも一方の絵柄層が印刷を施されたシートからなるものとすることによって、安価な襖とすることができる。
【0008】
また、前記熱可塑性合成樹脂の押出しコート層がポリオレフィン系樹脂であることを特徴とするものである。こうすることによって、表面からの湿度、温度等の影響を防ぎ反りや歪みのない襖とすることができ、また、廃棄物の処理に焼却処理を活用することができる。
【0009】
【発明の実施の形態】
以下、本発明の具体的な実施形態を図面を参照しながら説明する。
図1は本発明の反り防止襖の実施例の積層構成を示す断面図、図2は本発明の反り防止襖の他の実施例の積層構成を示す断面図、図3は本発明の環境試験の状態を示す説明図であり、1、1’は反り防止襖、2は芯材、3は段ボール製襖紙、4は波状中芯材、5は紙質系防湿シート、6は熱可塑性合成樹脂層、7は薄葉紙、8は接着剤層、9は化粧シートをそれぞれ表している。
【0010】
本発明の反り防止襖1は、図1に示すように、芯材2の両面に段ボール製襖紙3が積層された構成からなり、前記段ボール製襖紙3が波状中芯材4の両面に防湿性を有する熱可塑性合成樹脂層6の押出しコート層を介して2枚の薄葉紙7を積層した紙質系防湿シート5を貼着したものであることを特徴とするものである。
【0011】
本発明の芯材2は段ボール用の原紙を用いたハニカム構造体であるが、合成樹脂発泡体あるいは、段ボール等、軽量で、しかも表裏両面に襖紙(表装紙)を貼合せた状態において適度の強度を有するものであればよい。
【0012】
段ボール製襖紙3は、紙の強度を得るための波状中芯材4と、この波状中芯材4の表裏両側に配置された熱可塑性合成樹脂層6の押出しコート層からなる防湿層とその防湿層の両面に配置された薄葉紙7とを、薄葉紙7、熱可塑性合成樹脂層6、薄葉紙7、波状中芯材4、薄葉紙7、熱可塑性合成樹脂層6、薄葉紙7の順に積層したものであり、薄葉紙7が芯材2および波状中芯材4に接着されている。このように構成された反り防止襖1は、段ボール製襖紙3の波状中芯材4の両側に熱可塑性合成樹脂層6が位置するから熱可塑性合成樹脂層6により波状中芯材4と芯材2間の水分の移動が阻止されるとともに、波状中芯材4と外気との水分の移動が阻止され、従ってたとえ襖の表側と裏側の外気に温湿度差があっても反りを生じる恐れがない。
また、段ボール製襖紙3が波状中芯材4に薄葉紙7、熱可塑性合成樹脂層6、薄葉紙7の順に積層した紙質系防湿シート5を貼着したものであるから、製造が簡単で廉価であり、しかも最外面が薄葉紙7からなるから、その表面に意匠性の向上のために化粧シートを貼着したり、さらに、襖表面の化粧シートを張り替えることが容易である。
【0013】
反り防止襖1の防湿層として作用する紙質系防湿シート5に使用される薄葉紙7としては、秤量23〜50g/m2 の建材用プリント用紙、純白紙、或いは合成樹脂を混抄させて紙間強度を強化させた薄葉紙(いわゆる紙間強化紙)等が好ましく使用される。23g/m2 以下の場合は柔軟すぎ、貼合せ加工時しわが起こりやすく、50g/m2 以上の場合、紙層からの剥がれ、および湿気が浸透し易く不具合が生じる。貼り合わせる薄葉紙は、もちろん同種でも異種でもよく、また一方を絵柄を施した化粧シートとしても良いものである。さらに、防湿シート5の表面に印刷することにより安価なものも作製可能である。
【0014】
紙質系防湿シート5を構成する2枚の薄葉紙7を接着するための熱可塑性合成樹脂層6の押出しコート層としては、結果として芯材が反らない程度の耐水性を備えていればよく、水溶性樹脂以外は原則的に使用可能である。好ましい例としてはポリエチレン、ポリプロピレン、エチレン−酢酸ビニル共重合体等のポリオレフィン系樹脂が挙げられる。熱可塑性合成樹脂層6の厚みとしては、15〜50μm程度である。
【0015】
紙質系防湿シート5を作るには、薄葉紙7と熱可塑性合成樹脂6のフイルムを接着剤を使うか、あるいは使わずに熱などで貼り合わせ方法、2枚の薄葉紙7にエクストルージョンラミネート法により熱可塑性合成樹脂6の層を溶融押出しと同時にラミネートする方法があり、貼合せ方法は熱可塑性合成樹脂6の種類によって適したものを選択する。本発明のように、薄葉紙7、熱可塑性合成樹脂6および薄葉紙7の3つの層にするときには、エクストルージョンラミネート法により一度に3つの層を貼合せると、工程が少なくて済み、更に、本発明のように、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等のポリオレフィン系樹脂を熱可塑性合成樹脂として使用するときには、エクストルージョンラミネート法により熱可塑性合成樹脂を溶融押出しと同時にラミネートする方法が適した方法である。また、この時一方の薄葉紙7に絵柄印刷を施したものを用いて紙質系防湿シート5を作製してもよいものである。
【0016】
紙質系防湿シート5と波状中芯材4、および段ボール製襖紙3と芯材2との貼付けには一般的な接着剤、例えば、酢酸ビニル樹脂系、エチレン/ビニルアセテート樹脂系、尿素樹脂系、ウレタン樹脂系等のエマルジョン型接着剤が火気に対して安全で、臭気もなく価格的にも安価なため好ましく用いられる。
【0017】
また反り防止襖1の構成としては、図2に示す構成とすることもできる。図2に示す反り防止襖1’の構成は、熱可塑性合成樹脂層6の表裏両面に積層した薄葉紙7の一方の面に、絵柄印刷層が設けられた化粧シート9をエマルジョン型接着剤8を使用して貼着したもので、容易に良好な接着強度を発揮するものである。
【0018】
【実施例】
実施例1
秤量30g/m2 の紙間強化紙(三興製紙(株)製、FIX−30)にTダイ押出機から30μmの厚さにポリエチレンフイルムを押出しコーティングし、同時にもう一枚の秤量30g/m2 の紙間強化紙(三興製紙(株)製、FIX−30)をラミネートし、チルロールで冷却して薄葉紙が2層構造よりなる防湿シートを作製した。次に、上記防湿シートを酢酸ビニル系エマルジョン接着剤を用いて波形中芯材に貼付け、さらに秤量30g/m2 の紙間強化紙(三興製紙(株)製、FIX−30)にTダイ押出機から30μmの厚さにポリエチレンフイルムを押出しコーティングし、同時にもう一枚の秤量30g/m2 の紙間強化紙(三興製紙(株)製、FIX−30)に絵柄印刷層を設けた化粧シートをラミネートした防湿化粧シートを前記防湿シートを貼着した波形中芯材のもう一方の面に酢酸ビニル系エマルジョン接着剤で貼着し段ボール製襖紙を2枚作製した。
次いで襖用芯材の両側に前記段ボール製襖紙を酢酸ビニル系エマルジョン接着剤で貼合せ、枠を取付け幅800mm×長さ2000mmの襖を作製した。
【0019】
比較例1
上記実施例1の段ボール製襖紙の紙質系防湿シートの代わりに、秤量80g/m2 の段ボール用ライナー紙を用いた以外は、上記実施例1と同様にして襖を作製した。
【0020】
上記、実施例1及び比較例1で作製した襖を、図3のように2部屋の境界部に配置し環境試験を行い、襖の反り具合を測定した。
条件 高温低湿側 30℃ 30RH%
低温高湿側 5℃ 70RH%
放置時間 24時間
高さの中央点で反りの矢高(mm)を測定し表1の結果を得た。
【0021】
【表1】

Figure 0003841948
上記結果からも明らかなように、段ボール製襖紙に紙質系防湿シートを用いたものが、極めて反りが小さく防湿性に優れた成績を示している。
【0022】
【発明の効果】
本発明の反り防止襖は、紙強度を得るための波状中芯材の表裏両面に熱可塑性合成樹脂層よりなる防湿層を有する紙質系防湿シートを貼着した段ボール製襖紙をハニカム状の芯材の両面に接着した襖であるから、前記波状中芯材とハニカム状の芯材の間の水分の移動及び波状中芯材と外気の間の水分の移動が阻止され、従って襖の表裏両側の外気に温度差、湿度差があっても反りを生じることがない。
【0023】
また、波状中芯材の両面に貼着される紙質系防湿シートを、熱可塑性合成樹脂の押出し樹脂層を芯層とし両面に薄葉紙層が積層一体化されてなる3層構造とすることにより、芯層の熱可塑性合成樹脂層による防湿効果に加えて、表裏面における薄葉紙層が波状中芯材およびハニカムコア等芯材面に対し、火気に対して安全で、臭気がない、価格的にも安価なエマルジョン型接着剤を使用して良好な接着強度を発揮する。
【0024】
また、室内の雰囲気を変える場合或いは表面が破損又は汚れた場合襖紙を貼り替えたいことがある。このような場合においても、本発明の襖では通常使用されている安価な澱粉系等の接着剤で別の襖紙を貼り付けることが極めて簡単でその接着剤の水分にも左右されないものである。
【0025】
さらに、熱可塑性合成樹脂の押出しコート層をポリオレフィン系樹脂とすることによって、表面からの湿度、温度等の影響を防ぎ、反りや歪みのない襖とすることができ、また、廃棄物の処理に焼却処理を活用することができる。
【図面の簡単な説明】
【図1】本発明の反り防止襖の実施例の積層構成を示す断面図である。
【図2】本発明の反り防止襖の他の実施例の積層構成を示す断面図である。
【図3】本発明の環境試験の状態を示す説明図である。
【符号の説明】
1、1’反り防止襖
2 芯材
3 段ボール製襖紙
4 波状中芯材
5 紙質系防湿シート
6 熱可塑性合成樹脂層
7 薄葉紙
8 接着剤層
9 化粧シート[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bag used as a partition between rooms, a partition between a closet and a room, and the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known a kite in which a wooden lattice is used as a framework or a core material having a honeycomb structure is used as a core material, and cover sheets such as gypsum base paper, cardboard and corrugated paper are pasted on both sides. This type of fence is used as a room partition and a closet between the threshold and the duck. However, in this kind of firewood, if the temperature and humidity on both sides of the firewood are different, the warp is warped due to thermal expansion of the core material having a wood structure or a honeycomb structure. In addition, since the wood and the core material are porous, they may be warped by sucking moisture from one side. If the warp is warped in this way, it is very difficult to open and close the warp.
[0003]
In order to prevent this, it has been attempted to attach a metal foil such as iron foil or aluminum foil between the core material and the surface paper. However, it is difficult to separate the metal foil from other parts when the metal foil is pasted when it is aged, and the metal foil becomes a lump in the incinerator when subjected to incineration as it is. Disposal has become difficult due to damage to the furnace, and the moisture contained in the emulsion adhesive and the moisture contained in the core material causes corrosion of the metal foil and lowers the adhesive strength. Since a solvent-type adhesive must be used for bonding, an emulsion-type adhesive that is safe against fire and has no odor cannot be used, and the price tends to be expensive.
[0004]
[Problems to be solved by the invention]
Accordingly, the present invention has been made to solve the above-described problems, and provides a bag that is hardly warped, is lightweight, and can be manufactured at low cost.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the solution means of the present invention is such that two corrugated papers are laminated on both sides of the core material, and the corrugated papers have two basis weights of 23 to 50 g / m. The paper-type moisture-proof sheet obtained by laminating the thin paper of No. 2 through the thermoplastic synthetic resin extrusion coating layer is pasted on both sides of the corrugated core material, and is used as a warp prevention ridge. . With this configuration, the movement of moisture between the corrugated core material and the core material and the movement of moisture between the corrugated core material and the outside air are prevented. Even if there is, it is possible to make a wrinkle that does not warp. In addition, since both sides of the moisture-proof layer consisting of an extruded coated layer of thermoplastic synthetic resin are covered with thin paper, the thin paper absorbs the adhesive moderately, facilitating adhesion to the corrugated medium core material and the core material. In contrast, it uses an emulsion-type adhesive that is safe, odorless, and inexpensive, and exhibits good adhesive strength.
[0006]
Further, in a bag in which two corrugated cardboards are bonded to both sides of a core material, a pattern layer is formed on a surface located on the opposite side to the core material of the corrugated cardboard paper. It is. By doing so, the design is excellent. In addition, it is easy to replace the decorative sheet on the surface of the bag.
[0007]
In addition, by making at least one of the pattern layers to be a printed sheet, an inexpensive bag can be obtained.
[0008]
Further, the extrusion coating layer of the thermoplastic synthetic resin is a polyolefin resin. By doing so, it is possible to prevent the influence of humidity, temperature, and the like from the surface, and to prevent the warp and distortion from occurring, and it is possible to use incineration for waste disposal.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing a laminated structure of an embodiment of the warp-preventing cage of the present invention, FIG. 2 is a cross-sectional view showing a laminated structure of another embodiment of the warp-preventing cage of the present invention, and FIG. 1 and 1 'are warp prevention ridges, 2 is a core material, 3 is corrugated paper, 4 is a corrugated core material, 5 is a paper-based moisture-proof sheet, and 6 is a thermoplastic synthetic resin. Reference numeral 7 denotes a thin paper, 8 denotes an adhesive layer, and 9 denotes a decorative sheet.
[0010]
As shown in FIG. 1, the warp preventing scissors 1 of the present invention has a configuration in which corrugated paperboard 3 is laminated on both surfaces of a core material 2, and the corrugated paperboard 3 is disposed on both surfaces of a corrugated medium core material 4. It is characterized in that a paper-based moisture-proof sheet 5 in which two thin papers 7 are laminated is pasted through an extrusion coating layer of a thermoplastic synthetic resin layer 6 having moisture resistance.
[0011]
The core material 2 of the present invention is a honeycomb structure using a base paper for corrugated cardboard. However, the core material 2 is light in weight, such as a synthetic resin foam or corrugated cardboard, and is appropriate in a state in which a cover paper (front cover paper) is pasted on both sides. As long as it has the strength of.
[0012]
Corrugated cardboard 3 includes a corrugated core material 4 for obtaining the strength of the paper, a moisture-proof layer comprising an extrusion coating layer of a thermoplastic synthetic resin layer 6 disposed on both front and back sides of the corrugated core material 4, and its The thin paper 7 disposed on both sides of the moisture-proof layer is laminated with the thin paper 7, the thermoplastic synthetic resin layer 6, the thin paper 7, the corrugated core material 4, the thin paper 7, the thermoplastic synthetic resin layer 6, and the thin paper 7 in this order. Yes, the thin paper 7 is bonded to the core material 2 and the corrugated medium core material 4. Since the thermoplastic synthetic resin layer 6 is located on both sides of the corrugated core material 4 of the corrugated cardboard 3, the warp preventing corrugated board 1 configured in this way is arranged with the corrugated intermediate core material 4 by the thermoplastic synthetic resin layer 6. Moisture movement between the materials 2 is prevented, and moisture movement between the corrugated core material 4 and the outside air is prevented, so that even if there is a temperature / humidity difference between the outside air on the front side and the back side, there is a risk of warping There is no.
Further, the corrugated cardboard 3 is made by laminating a paper-based moistureproof sheet 5 in which a thin paper 7, a thermoplastic synthetic resin layer 6 and a thin paper 7 are laminated in this order on a corrugated core material 4, so that the production is simple and inexpensive. In addition, since the outermost surface is made of thin paper 7, it is easy to attach a decorative sheet to the surface of the sheet 7 or to refit the decorative sheet on the heel surface.
[0013]
As the thin paper 7 used for the paper-based moisture-proof sheet 5 that acts as a moisture-proof layer of the warp-preventing ridge 1, the strength of the paper is obtained by mixing a 23 to 50 g / m 2 building paper, a pure white paper, or a synthetic resin. A thin paper (so-called inter-paper reinforced paper) or the like that has been reinforced is preferably used. If it is 23 g / m 2 or less, it is too flexible and wrinkles are liable to occur during the laminating process, and if it is 50 g / m 2 or more, peeling from the paper layer and moisture are likely to permeate. The thin paper to be bonded may of course be the same or different, and one of them may be a decorative sheet with a pattern on one side. Furthermore, an inexpensive one can be produced by printing on the surface of the moisture-proof sheet 5.
[0014]
As an extrusion coating layer of the thermoplastic synthetic resin layer 6 for adhering the two thin paper sheets 7 constituting the paper-based moisture-proof sheet 5, it is sufficient if the core material has a water resistance that does not warp as a result. In principle, other than water-soluble resins can be used. Preferable examples include polyolefin resins such as polyethylene, polypropylene, and ethylene-vinyl acetate copolymer. The thickness of the thermoplastic synthetic resin layer 6 is about 15 to 50 μm.
[0015]
To make a paper-based moisture-proof sheet 5, the film of the thin paper 7 and the thermoplastic synthetic resin 6 is bonded with heat or without using an adhesive, and heat is applied to the two thin papers 7 by the extrusion laminating method. There is a method of laminating a layer of the plastic synthetic resin 6 at the same time as melt extrusion, and a laminating method is selected according to the kind of the thermoplastic synthetic resin 6. When the three layers of the thin paper 7, the thermoplastic synthetic resin 6 and the thin paper 7 are formed as in the present invention, the number of steps can be reduced by laminating the three layers at one time by the extrusion laminating method. When polyolefin resins such as polyethylene, polypropylene, and ethylene-vinyl acetate copolymer are used as thermoplastic synthetic resins, the method of laminating the thermoplastic synthetic resin simultaneously with melt extrusion by the extrusion laminating method is suitable. Is the method. Further, at this time, the paper-based moisture-proof sheet 5 may be produced by using a pattern printed on one thin paper 7.
[0016]
For adhering the paper-based moisture-proof sheet 5 and the corrugated core material 4, and the corrugated cardboard paper 3 and the core material 2, common adhesives such as vinyl acetate resin, ethylene / vinyl acetate resin, urea resin An emulsion type adhesive such as urethane resin is preferably used because it is safe against fire, has no odor, and is inexpensive in price.
[0017]
Moreover, as a structure of the curvature prevention collar 1, it can also be set as the structure shown in FIG. The warp preventing ridge 1 ′ shown in FIG. 2 is composed of a decorative sheet 9 provided with a pattern printing layer on one surface of a thin paper 7 laminated on both sides of a thermoplastic synthetic resin layer 6 and an emulsion adhesive 8. Used and adhered, it easily exhibits good adhesive strength.
[0018]
【Example】
Example 1
A 30 mm / m 2 inter-paper reinforced paper (manufactured by Sanko Paper Co., Ltd., FIX-30) was extruded and coated with a polyethylene film to a thickness of 30 μm from a T-die extruder. Two paper-reinforced paper (manufactured by Sanko Paper Co., Ltd., FIX-30) was laminated and cooled with a chill roll to prepare a moisture-proof sheet having a two-layer structure of thin paper. Next, the moisture-proof sheet is affixed to a corrugated core using a vinyl acetate emulsion adhesive, and further, a T-die is attached to a paper-reinforced paper having a weight of 30 g / m 2 (manufactured by Sanko Paper Co., Ltd., FIX-30). A polyethylene film was extrusion coated to a thickness of 30 μm from the extruder, and at the same time, a pattern printing layer was provided on another sheet of paper-reinforced paper having a weight of 30 g / m 2 (manufactured by Sanko Paper Co., Ltd., FIX-30). A moisture-proof decorative sheet laminated with a decorative sheet was attached to the other surface of the corrugated core material with the moisture-proof sheet attached thereto with a vinyl acetate emulsion adhesive to produce two corrugated paperboards.
Next, the corrugated cardboard paper was pasted on both sides of the core material with a vinyl acetate emulsion adhesive, and a frame was attached to produce a bag having a width of 800 mm and a length of 2000 mm.
[0019]
Comparative Example 1
A cocoon was produced in the same manner as in Example 1 except that a cardboard liner paper having a weight of 80 g / m 2 was used in place of the paper-based moisture-proof sheet of the cardboard stencil of Example 1 above.
[0020]
The scissors produced in Example 1 and Comparative Example 1 were placed at the boundary between the two rooms as shown in FIG. 3 and subjected to an environmental test to measure the warpage of the scissors.
Conditions High temperature and low humidity 30 ° C 30RH%
Low temperature and high humidity side 5 ℃ 70RH%
Standing time The arrow height (mm) of the warp was measured at the center point of the 24-hour height, and the results in Table 1 were obtained.
[0021]
[Table 1]
Figure 0003841948
As is clear from the above results, a paper-based moisture-proof sheet used for corrugated cardboard shows extremely low warpage and excellent moisture resistance.
[0022]
【The invention's effect】
The warp-preventing ridge of the present invention comprises a corrugated cardboard paper having a paper-based moisture-proof sheet having a moisture-proof layer made of a thermoplastic synthetic resin layer on both sides of a corrugated medium core material for obtaining paper strength. Since the ridges are bonded to both sides of the material, the movement of moisture between the corrugated medium core material and the honeycomb core material and the movement of moisture between the corrugated medium core material and the outside air are prevented, so both sides of the corrugation Even if there is a temperature difference or humidity difference in the outside air, there will be no warping.
[0023]
Further, the paper quality based moisture-proof sheet is adhered on both surfaces of the corrugated medium material, by thin sheet of paper layers on both sides and extrusion resin layer of thermoplastic synthetic resin and the core layer has a three-layer structure formed by stacking integrated , in addition to the moisture-proof effect by the thermoplastic synthetic resin layer of the core layer, thin sheet paper layer in the front and back surfaces relative to corrugated medium material and honeycomb core such as a core material surface, is safe for fire, there is no odor, Price manner In addition, an inexpensive emulsion-type adhesive is used to exhibit good adhesive strength.
[0024]
In addition, when changing the indoor atmosphere, or when the surface is damaged or dirty, there is a case where it is desired to replace the paper. Even in such a case, it is very easy to attach another paper with an inexpensive starch-based adhesive ordinarily used in the bag of the present invention, and it is not affected by the moisture of the adhesive. .
[0025]
Furthermore, by making the extrusion coating layer of thermoplastic synthetic resin into a polyolefin resin, it is possible to prevent the influence of humidity, temperature, etc. from the surface, and to prevent wrinkles and distortions, and to treat waste Incineration can be used.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a laminated structure of an embodiment of a warp prevention rod of the present invention.
FIG. 2 is a cross-sectional view showing a laminated structure of another embodiment of the warp prevention rod of the present invention.
FIG. 3 is an explanatory diagram showing a state of an environmental test of the present invention.
[Explanation of symbols]
1, 1 'Warp prevention ridge 2 Core material 3 Corrugated paper 4 Corrugated core material 5 Paper-based moisture-proof sheet 6 Thermoplastic synthetic resin layer 7 Thin paper 8 Adhesive layer 9 Cosmetic sheet

Claims (4)

2枚の段ボール製襖紙を芯材の両側に貼合せた襖において、前記段ボール製襖紙が2枚のそれぞれ坪量23〜50g/m 2 薄葉紙を熱可塑性合成樹脂の押出しコート層を介して積層してなる紙質系防湿シートを波状中芯材の両面に貼着したものであることを特徴とする反り防止襖。In fusuma which laminating two sheets of corrugated board fusuma paper on both sides of the core material, the cardboard fusuma thin paper sheet each having a basis weight of 23~50g / m 2 of two through the extrusion coating layer of a thermoplastic synthetic resin A warp-preventing flaw characterized in that a paper-based moisture-proof sheet formed by laminating is laminated on both sides of a corrugated core material. 2枚の段ボール製襖紙を芯材の両側に貼合した襖において、前記段ボール製襖紙の前記芯材と反対側に位置する面に絵柄層が形成されていることを特徴とする請求項1記載の反り防止襖。  The pattern layer is formed in the surface which is opposite to the said core material of the said corrugated paper, in the paper which bonded two sheets of corrugated paper on both sides of the core material. 1. The warp prevention rod according to 1. 前記絵柄層の少なくとも一方の絵柄層が印刷を施されたシートからなることを特徴とする請求項1、2記載の反り防止襖。  The warp prevention ridge according to claim 1 or 2, wherein at least one of the pattern layers is a printed sheet. 前記熱可塑性合成樹脂の押出しコート層がポリオレフィン系樹脂であることを特徴とする請求項1〜3記載の反り防止襖。  The warp prevention ridge according to claim 1, wherein the extrusion coating layer of the thermoplastic synthetic resin is a polyolefin resin.
JP36714597A 1997-12-24 1997-12-24 Warp prevention Expired - Fee Related JP3841948B2 (en)

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