JP4392735B2 - Wallpaper and manufacturing method thereof - Google Patents

Wallpaper and manufacturing method thereof Download PDF

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JP4392735B2
JP4392735B2 JP2001061022A JP2001061022A JP4392735B2 JP 4392735 B2 JP4392735 B2 JP 4392735B2 JP 2001061022 A JP2001061022 A JP 2001061022A JP 2001061022 A JP2001061022 A JP 2001061022A JP 4392735 B2 JP4392735 B2 JP 4392735B2
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Prior art keywords
wallpaper
adhesive
air permeability
backing paper
carboxyl group
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JP2002266255A (en
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高志 惟村
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Kohjin Holdings Co Ltd
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Kohjin Holdings Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、壁紙及びその製造方法に関する。更に詳しくは、通気性基材と裏打ち紙を貼り合わせた、通気性があり、接着力及び耐水接着力に優れた壁紙、及びその製造方法に関する。
【0002】
【従来の技術】
従来、壁紙として、裏打ち紙に塩化ビニルを塗工してエンボス加工を施した塩化ビニル壁紙が広く利用されている。しかし、塩化ビニルは焼却処理においてダイオキシン類を発生する可能性が指摘されていることから、近年、塩化ビニル壁紙の使用を控える傾向が強くなってきている。塩化ビニルを使用しない壁紙としては、嵩高くエンボス適性がよく、そのものの質感が好ましい不織布等の通気性基材を用い、裏打ち紙と接着剤で貼り合わせて通気性基材表面にエンボス加工を施した壁紙が用いられている。
壁紙は、一般に、壁、天井等に貼る場合、水溶性あるいは水分散性の接着剤で糊付けが行われる。そのため、貼り合わせ壁紙の接着剤としては、耐水接着力が要求される。
【0003】
かかる壁紙としては、例えば、特開平10−100323号公報に開示されているごとく、溶剤系接着剤を使用したドライラミネート法が知られている。ドライラミネート法は接着剤が均一な皮膜となるために通気性基材と裏打ち紙の接着力が強く、かつ耐水接着力も優れている。しかしながら、壁紙の接着剤層に有機溶剤が残留し人体への悪影響が懸念されること、接着剤が均一な被膜層となるために通気性に乏しく、壁紙に結露が発生しやすく、そのためにカビによる汚れあるいはダニの発生原因となる、という欠点があった。
【0004】
一方、有機溶剤を使用しない壁紙も報告されており、例えば特開平3−19999号公報には、疎水性単量体を主成分とする乾燥皮膜の透湿度が低い共重合体エマルジョンを接着剤として使用した織物壁紙が開示されている。しかしながら、被膜の透湿度を小さくすることから、通気性に乏しく結露が発生しやすくなり、通気性の改善のため接着剤の塗工量を低下させると耐水接着力に劣る、という欠点を有していた。
【0005】
また、熱可塑性樹脂を用いた押出ラミネーション法による不織布壁紙も報告されているが(特開平11−227086号公報)、熱ラミネート法ではドライラミネート法と同様通気性に乏しくなるという問題があり、筋ラミネート法では通気性は得られるものの熱可塑性樹脂のない部分は不織布と裏打ち紙が接着されないために接着力に乏しいという問題があった。
【0006】
【発明が解決しようとする課題】
したがって、本発明は、従来の通気性基材と裏打ち紙を貼り合わせた壁紙の問題点を解消し、接着力及び耐水接着性に優れ、かつ、通気性の良好な壁紙及びその製造方法を提供することを課題とする。
【0007】
【課題を解決するための手段】
本発明者らは、かかる課題を解決すべく鋭意検討の結果、特定の接着剤を用い、ウェットラミネート方式で通気性基材と裏打ち紙とを貼り合わせることにより、通気性がよく、接着力及び耐水接着力が優れた壁紙が得られることを見出し、本発明に到達した。
すなわち本発明は、
(1)乾燥後の塗工量が2〜15g/m のアンモニアで中和されたカルボキシル基を含有するポリオレフィン系樹脂を接着剤として、通気性基材と裏打ち紙とを貼り合わせた、透気度100秒以下の壁紙、
(2)ポリオレフィン系樹脂中のカルボキシル基含有モノマーが5〜50重量%である、上記(1)記載の壁紙、
(3)通気性基材と裏打ち紙とを、乾燥後の塗工量が2〜15g/m のアンモニアで中和されたカルボキシル基を含有するポリオレフィン系樹脂を接着剤として、ウェットラミネート方式により貼り合わせた、透気度100秒以下の壁紙の製造方法、
を提供するものである。
【0008】
以下、本発明を詳細に説明する。
本発明で用いられる通気性基材は特に制限はないが、絹、毛、綿、麻等の天然繊維、レーヨン、ナイロン、ポリエチレン、ポリエステル、ポリプロピレン、アクリル等の再生繊維・合成繊維などを、単独あるいは組み合わせて公知の方法により製造された不織布、織物、編物、毛、あるいは紙等を挙げることができる。これら通気性基材のうち、嵩高くエンボス適性がよく、質感が好ましい不織布が望ましい。
【0009】
本発明で使用する裏打ち紙は、通気性を有するシート状のものであればよく、例えば、紙、織布等が挙げられるが、通常、一般的に壁紙の裏打ち紙として用いられている原紙が好ましく、壁紙を剥がすときのピール性(紙層間剥離力)、強度等の特性を満足することができる。更に、難燃剤を添加した原紙、水酸化アルミニウム、水酸化カルシウム等の無機質割合の高い無機質紙のごとき難燃処理された原紙、着色された原紙も使用できる。
裏打ち紙の透気度は50秒以下のものが好ましい。
また、通気性基材を貼り合わせた壁紙は塩化ビニル壁紙と比較して不透明性が低いため、不透明度が85%以上の裏打ち紙を用いることが好ましい。
【0010】
通気性基材と裏打ち紙とを貼り合わせる接着剤は、カルボキシル基を含有するモノマーとオレフィンとの共重合体をアンモニアで中和した、中和されたカルボキシル基を含有したポリオレフィン系樹脂(以下、単に「カルボキシル基含有ポリオレフィン系樹脂」という)が使用される。
カルボキシル基(酸無水基を含む)を含有するモノマーとしては、アクリル酸、メタクリル酸、マレイン酸、無水マレイン酸等が挙げられ、一方、オレフィンとしては、エチレン、プロピレン、ブテン、オクテン、ヘキセン等が挙げられ、これらは、それぞれ、単独あるいは2種以上が併用されてもよい。カルボキシル基を含有したポリオレフィン系樹脂としては、エチレン−アクリル酸共重合体が好ましい。
これら樹脂中のカルボキシル基は、アンモニアにより中和されている必要があり、その中和度は、カルボキシル基の35〜100%、好ましくは40〜70%である。中和度が35%未満であると分散性が劣り、水性分散液を得ることが難しい。中和方法は任意であるが、カルボキシル基を含有したポリオレフィン共重合体を水中でアンモニアとともに加熱撹拌する方法が簡便で望ましい。
水性分散液を得るに際し、界面活性剤を使用しないことが望ましい。
カルボキシル基含有ポリオレフィン系樹脂中の各モノマーの組成は任意であるが、通気性、耐水接着性を両立するために、カルボキシル基含有モノマーが、全モノマー中、5〜50重量%であることが好ましい。
【0011】
カルボキシル基含有ポリオレフィン系樹脂には、本発明の効果を損なわない範囲で、ポリエチレン、ポリプロピレン、エチレン−プロピレンコポリマー、エチレン−1−ブテンコポリマー、エチレン−1−オクテンコポリマー、エチレン−1−ヘキサンコポリマー等のポリオレフィン系樹脂、エチレン−酢酸ビニル共重合体、エチレン−アクリル酸エステル共重合体等のオレフィンと他のモノマーとの共重合体、等を併用することができる。
また、壁紙への機能を付与するため撥水剤、難燃剤、抗菌剤、無機填料等を添加することもできる。
【0012】
カルボキシル基含有ポリオレフィン系樹脂は、乾燥後の塗工量として、2〜15g/m 、好ましくは3〜12g/m の範囲で使用される。
塗工量がこれより少ないと接着力が低下し、一方、多すぎると通気性が乏しくなり、コスト的にも不利になる。
【0013】
本発明の壁紙は、通気性基材と裏打ち紙を、ウェットラミネート方式で貼り合わせることにより製造される。
接着剤の塗工方法としては、ロールコート、グラビアコート、ワイヤーバーコート、ダイコート等の公知の塗工方法が使用できる。
【0014】
本発明の壁紙は、JIS−P8117紙及び板紙の透気度試験法での透気度が100秒以下のものである。
透気度がこれより高いと通気性に劣り、壁紙に結露が発生しやすくなり、カビによる汚れ、ダニの発生原因になりやすい。
【0015】
本発明の壁紙は、通気性基材側表面に印刷及びエンボス加工を施すことができる。
また、通気性を損なわない範囲で、通気性基材表面に、防汚処理、撥水処理、抗菌処理等を行ってもよい。
【0016】
本発明の特徴は、界面活性剤を使用しない、アンモニアで中和されたカルボキシル基を含有するポリオレフィン系樹脂を接着剤として使用する点にある。ウェットラミネート方式では、接着剤が液状のうちに通気性基材と裏打ち紙を貼り合わせるために、通気性基材や裏打ち紙に接着剤がしみ込みやすく、接着界面で接着剤が均一皮膜になりにくく、通気性が付与される。しかしながら、接着剤の一部が基材中にしみ込むことから、接着に有効な接着剤量は限られる。アンモニアで中和したカルボキシル基を含有するポリオレフィン系樹脂が、少ない有効接着剤量で、十分な接着力、特に耐水接着力が得られたことは、アンモニアが乾燥時に揮発し容易に除去されるため、皮膜の造膜性が向上すると共に、皮膜の親水性が失われるためと、本発明者らは推察している。
【0017】
【実施例】
以下実施例を挙げて、本発明をさらに詳細に説明する。
尚、本例の評価は以下の方法によった。
A.透気度
JIS−P8117に準拠し、王研式透気度平滑度試験機KY−5にて測定した。
B.壁紙表面の結露状態
横30cm×縦30cm×厚さ2cmの木板に、JIS−A6922適合壁紙施工用でん粉系接着剤と水とを1:2の割合で混合した糊で、壁紙を貼り付け、30℃90%RH条件下に1日置いた後に、壁紙の表面状態を観察した。
C.接着力
横5cm×縦10cmにカットした不織布壁紙の、不織布と裏打ち紙とを手で剥がした時の剥離状態を観察した。
○:接着剤層で剥離せず、裏打ち紙の紙間層で剥離する。
△:接着剤層で剥離するが、容易ではない。
×:接着剤層で容易に剥離する。
D.耐水接着力
横5cm×縦10cmにカットした不織布壁紙を1時間水に浸漬後、不織布と裏打ち紙とを手で剥がした時の剥離状態を観察した。
○:接着剤層で剥離せず、裏打ち紙の紙間層で剥離する。
△:接着剤層で剥離するが、容易ではない。
×:接着剤層で容易に剥離する。
【0018】
実施例1
アンモニアで中和されたエチレン−アクリル酸共重合体水性分散液(住友精化(株)製、ザイクセンA)を、乾燥後2g/m になるように、坪量110g/m の壁紙用裏打ち紙((株)興人製、WK−6110TK)に塗工して、ポリエステル繊維とレーヨン繊維からなる不織布(オーミケンシ(株)製、ピロスPXB0040、坪量40g/m )を貼り合わせた後、乾燥して本発明の壁紙を作製した。
得られた壁紙は、透気度7秒であり、接着力、耐水接着力共に良好であった。
結果を表1に示す。
【0019】
実施例2
実施例1において、エチレン−アクリル酸共重合体水性分散液を、乾燥後5g/m となるように塗工した以外は、実施例1と同様に実施することにより、本発明の壁紙を作製した。
得られた壁紙は、透気度10秒であり、接着力、耐水接着力共に良好であった。
結果を表1に示す。
【0020】
実施例3
アンモニアで中和されたエチレン−アクリル酸共重合体水性分散液(住友精化(株)製、ザイクセンAC)を、乾燥後15g/m になるように、実施例1で用いた壁紙用裏打ち紙に塗工して、ポリエステル繊維とセルロース繊維からなる不織布(デュポン(株)製、ソンタラスパンレース8492、坪量40g/m )を貼り合わせた後、乾燥して本発明の壁紙を作製した。
得られた壁紙は、透気度28秒であり、接着力、耐水接着力共に良好であった。
本壁紙について、30℃90%RH結露試験を行ったところ、結露は発生しなかった。
結果を表1に示す。
【0021】
比較例1
実施例1で用いた裏打ち紙に、乾燥後2g/m になるように、溶剤系ウレタン樹脂(日本ポリウレタン工業(株)製、ニッポラン3126)を塗工し、乾燥機で溶剤の一部を蒸発させ、実施例1で用いた不織布を重ねて加熱加圧して貼り合わせたが、接着力が弱かったため、接着剤の塗工量を6g/m として不織布壁紙を作製した。
得られた壁紙は、接着力、耐水接着力は良好であったが、透気度530秒と通気性に乏しい結果であった。
本壁紙について、30℃90%RH結露試験を行ったところ、結露が発生した。
結果を表1に示す。
【0022】
比較例2
実施例1で用いた裏打ち紙に、乾燥後50g/m になるように、溶剤系ポリエステル樹脂(東洋紡績(株)製、バイロン20SS)を塗工し、乾燥機で溶剤の一部を蒸発させ、実施例1で用いた不織布を重ねて加熱加圧して貼り合わせて不織布壁紙を作製した。
得られた壁紙は、接着力、耐水接着力共に良好であったが、透気度は800秒と通気性に乏しい結果であった。
結果を表1に示す。
【0023】
比較例3
実施例1において、エチレン−アクリル酸共重合体水性分散液に代えてポリエステル系エマルジョン(東洋紡績(株)製、バイオナールMD1245)を、乾燥後2g/m となるように塗工した以外は、実施例1と同様に実施することにより、不織布壁紙を作製した。
得られた壁紙は、透気度5秒であったが、接着力、耐水接着力共に劣る結果であった。
結果を表1に示す。
【0024】
比較例4
実施例1において、エチレン−アクリル酸共重合体水性分散液に代えてエチレン系エマルジョン(住友化学(株)製、スミカフレックス920)を、乾燥後15g/m となるように塗工した以外は、実施例1と同様に実施することにより、不織布壁紙を作製した。
得られた壁紙は、透気度24秒であり、接着力も良好であったが、耐水接着力が劣る結果であった。
結果を表1に示す。
【0025】
【表1】

Figure 0004392735
【0026】
【発明の効果】
以上述べてきたように、本発明によれば、接着力、耐水接着力が優れ、かつ、通気性が良好な、通気性基材と裏打ち紙を貼り合わせた壁紙が提供さる。特に、優れた通気性のために、結露を防ぎ、カビによる汚れ、ダニの発生等のおそれが少ない。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to wallpaper and a method for manufacturing the wallpaper. More specifically, the present invention relates to a wallpaper having a breathable base material and a backing paper, which has a breathability and excellent adhesion and water-resistant adhesion, and a method for producing the wallpaper.
[0002]
[Prior art]
Conventionally, as wallpaper, vinyl chloride wallpaper in which vinyl chloride is coated on a backing paper and embossed is used widely. However, since it has been pointed out that vinyl chloride may generate dioxins in the incineration process, in recent years, there is a strong tendency to refrain from using vinyl chloride wallpaper. For wallpaper that does not use vinyl chloride, use a breathable base material such as non-woven fabric that is bulky, has good embossability, and has a good texture, and is bonded to the backing paper with an adhesive to emboss the surface of the breathable base material. Wallpaper is used.
In general, wallpaper is pasted with a water-soluble or water-dispersible adhesive when pasted on a wall, ceiling, or the like. For this reason, water-resistant adhesive strength is required as an adhesive for laminated wallpaper.
[0003]
As such wallpaper, a dry laminating method using a solvent-based adhesive is known as disclosed in, for example, Japanese Patent Laid-Open No. 10-100433. In the dry laminating method, since the adhesive becomes a uniform film, the adhesive strength between the breathable substrate and the backing paper is strong, and the water-resistant adhesive strength is also excellent. However, the organic solvent remains in the adhesive layer of the wallpaper and there are concerns about adverse effects on the human body, and since the adhesive becomes a uniform coating layer, the wallpaper is poor in air permeability and condensation is likely to occur on the wallpaper. It has the disadvantage of causing dirt or ticks.
[0004]
On the other hand, wallpaper that does not use an organic solvent has also been reported. For example, Japanese Patent Application Laid-Open No. 3-19999 uses, as an adhesive, a copolymer emulsion having a dry film mainly composed of a hydrophobic monomer and having a low moisture permeability. The textile wallpaper used is disclosed. However, since the moisture permeability of the film is reduced, the air permeability is poor and condensation tends to occur.If the coating amount of the adhesive is reduced to improve the air permeability, the water-resistant adhesive strength is inferior. It was.
[0005]
Further, although non-woven wallpaper by an extrusion lamination method using a thermoplastic resin has been reported (Japanese Patent Laid-Open No. 11-227086), there is a problem that the thermal laminating method has poor air permeability like the dry laminating method. In the laminate method, although air permeability is obtained, there is a problem that the portion without the thermoplastic resin has poor adhesion because the nonwoven fabric and the backing paper are not bonded.
[0006]
[Problems to be solved by the invention]
Therefore, the present invention eliminates the problems of the conventional wallpaper in which the breathable base material and the backing paper are bonded together, and provides a wallpaper having excellent adhesion and water-resistant adhesion, and good breathability, and a method for producing the same. The task is to do.
[0007]
[Means for Solving the Problems]
As a result of intensive studies to solve such problems, the present inventors used a specific adhesive and bonded the breathable substrate and the backing paper by a wet laminating method, thereby providing good breathability, adhesive strength and The present inventors have found that a wallpaper having excellent water-resistant adhesion can be obtained, and have reached the present invention.
That is, the present invention
(1) A breathable base material and a backing paper were bonded to each other using a polyolefin resin containing a carboxyl group neutralized with ammonia having a coating amount after drying of 2 to 15 g / m 2 as an adhesive. Wallpaper with a temper of 100 seconds or less,
(2) The wallpaper according to (1) above, wherein the carboxyl group-containing monomer in the polyolefin-based resin is 5 to 50% by weight,
(3) By wet laminating method using a polyolefin resin containing a carboxyl group neutralized with ammonia having a coating amount after drying of 2 to 15 g / m 2 as an adhesive. A method for producing a wallpaper having an air permeability of 100 seconds or less,
Is to provide.
[0008]
Hereinafter, the present invention will be described in detail.
The breathable substrate used in the present invention is not particularly limited, but natural fibers such as silk, wool, cotton, hemp and the like, and regenerated fibers and synthetic fibers such as rayon, nylon, polyethylene, polyester, polypropylene, acrylic, etc. Alternatively, non-woven fabrics, woven fabrics, knitted fabrics, hairs, papers, and the like manufactured by a known method in combination can be exemplified. Of these breathable substrates, a nonwoven fabric that is bulky, has good embossability, and has a good texture is desirable.
[0009]
The backing paper used in the present invention may be in the form of a sheet having air permeability, and examples thereof include paper, woven fabric, and the like. Usually, a base paper generally used as a backing paper for wallpaper is used. Preferably, properties such as peelability (paper delamination force) and strength when the wallpaper is peeled off can be satisfied. Furthermore, a base paper that has been subjected to a flame-retardant treatment such as a base paper to which a flame retardant is added, an inorganic paper having a high inorganic ratio such as aluminum hydroxide and calcium hydroxide, and a colored base paper can be used.
The air permeability of the backing paper is preferably 50 seconds or less.
Further, since the wallpaper on which the breathable substrate is bonded has lower opacity than the vinyl chloride wallpaper, it is preferable to use a backing paper having an opacity of 85% or more.
[0010]
The adhesive that bonds the breathable substrate and the backing paper is a neutralized carboxyl group-containing polyolefin-based resin (hereinafter referred to as “polyolefin resin”) obtained by neutralizing a copolymer of a carboxyl group-containing monomer and an olefin with ammonia. Simply referred to as “carboxyl group-containing polyolefin resin”).
Examples of the monomer containing a carboxyl group (including an acid anhydride group) include acrylic acid, methacrylic acid, maleic acid, and maleic anhydride. On the other hand, examples of olefin include ethylene, propylene, butene, octene, and hexene. Each of these may be used alone or in combination of two or more. As polyolefin resin containing a carboxyl group, an ethylene-acrylic acid copolymer is preferable.
The carboxyl groups in these resins must be neutralized with ammonia, and the degree of neutralization is 35 to 100%, preferably 40 to 70% of the carboxyl groups. If the degree of neutralization is less than 35%, the dispersibility is poor and it is difficult to obtain an aqueous dispersion. The neutralization method is arbitrary, but a method of heating and stirring the polyolefin copolymer containing a carboxyl group together with ammonia in water is simple and desirable.
In obtaining an aqueous dispersion, it is desirable not to use a surfactant.
The composition of each monomer in the carboxyl group-containing polyolefin resin is arbitrary, but in order to achieve both air permeability and water-resistant adhesion, the carboxyl group-containing monomer is preferably 5 to 50% by weight in the total monomers. .
[0011]
Examples of the carboxyl group-containing polyolefin-based resin include polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-1-butene copolymer, ethylene-1-octene copolymer, and ethylene-1-hexane copolymer as long as the effects of the present invention are not impaired. A copolymer of an olefin such as a polyolefin resin, an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid ester copolymer, and other monomers, and the like can be used in combination.
In addition, a water repellent, a flame retardant, an antibacterial agent, an inorganic filler and the like can be added to impart a function to the wallpaper.
[0012]
The carboxyl group-containing polyolefin resin is used in the range of 2 to 15 g / m 2 , preferably 3 to 12 g / m 2 as the coating amount after drying.
If the coating amount is less than this, the adhesive strength is lowered. On the other hand, if the coating amount is too large, the air permeability becomes poor and the cost becomes disadvantageous.
[0013]
The wallpaper of the present invention is manufactured by laminating a breathable base material and a backing paper by a wet laminating method.
As an adhesive coating method, known coating methods such as roll coating, gravure coating, wire bar coating, and die coating can be used.
[0014]
The wallpaper of the present invention has an air permeability of 100 seconds or less according to the air permeability test method of JIS-P8117 paper and paperboard.
If the air permeability is higher than this, the air permeability is inferior, condensation tends to occur on the wallpaper, and it tends to cause mold stains and mites.
[0015]
The wallpaper of the present invention can be printed and embossed on the surface of the breathable substrate.
Further, an antifouling treatment, a water repellent treatment, an antibacterial treatment, and the like may be performed on the surface of the breathable substrate within a range that does not impair the breathability.
[0016]
A feature of the present invention is that a polyolefin-based resin containing a carboxyl group neutralized with ammonia and not using a surfactant is used as an adhesive. In the wet laminating method, the air-permeable substrate and backing paper are bonded together while the adhesive is in liquid form, so that the adhesive can easily penetrate into the air-permeable substrate and backing paper, and the adhesive becomes a uniform film at the adhesive interface. Difficult and breathable. However, since a part of the adhesive penetrates into the base material, the amount of adhesive effective for adhesion is limited. The polyolefin resin containing carboxyl groups neutralized with ammonia has a sufficient adhesive strength, particularly water-resistant adhesive strength, with a small amount of effective adhesive. This is because ammonia volatilizes and is easily removed during drying. The present inventors speculate that the film-forming property of the film is improved and the hydrophilicity of the film is lost.
[0017]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples.
In addition, evaluation of this example was based on the following method.
A. Based on air permeability JIS-P8117, it measured with Oken type air permeability smoothness tester KY-5.
B. Dew condensation on the surface of the wallpaper 30cm wide × 30cm long × 2cm thick wood paste with a 1: 2 mix of JIS-A6922-compliant starch adhesive and water in a ratio of 1: 2 The surface condition of the wallpaper was observed after 1 day under 90 ° C. RH conditions.
C. The peeled state when the nonwoven fabric and the backing paper of the nonwoven fabric wallpaper cut to 5 cm wide by 10 cm long was peeled by hand was observed.
○: Not peeled by the adhesive layer, but peeled by the inter-sheet layer of the backing paper.
(Triangle | delta): Although it peels with an adhesive bond layer, it is not easy.
X: It peels easily with an adhesive layer.
D. The nonwoven fabric wallpaper cut to 5 cm wide by 10 cm long was immersed in water for 1 hour, and then the peeled state when the nonwoven fabric and the backing paper were peeled by hand was observed.
○: Not peeled by the adhesive layer, but peeled by the inter-sheet layer of the backing paper.
(Triangle | delta): Although it peels with an adhesive bond layer, it is not easy.
X: It peels easily with an adhesive layer.
[0018]
Example 1
For wallpaper having a basis weight of 110 g / m 2, an aqueous ethylene-acrylic acid copolymer dispersion neutralized with ammonia (manufactured by Sumitomo Seika Co., Ltd., Saixen A) is 2 g / m 2 after drying. After coating on a backing paper (WK-6110TK, manufactured by Kojin Co., Ltd.) and bonding a non-woven fabric made of polyester fiber and rayon fiber (Omikenshi Co., Ltd., Pyros PXB0040, basis weight 40 g / m 2 ) The wallpaper of the present invention was prepared by drying.
The obtained wallpaper had an air permeability of 7 seconds and had good adhesion and water-resistant adhesion.
The results are shown in Table 1.
[0019]
Example 2
In Example 1, the wallpaper of the present invention was produced by carrying out in the same manner as in Example 1 except that the aqueous ethylene-acrylic acid copolymer dispersion was applied to give 5 g / m 2 after drying. did.
The obtained wallpaper had an air permeability of 10 seconds and had good adhesion and water-resistant adhesion.
The results are shown in Table 1.
[0020]
Example 3
Backing for wallpaper used in Example 1 so that an aqueous ethylene-acrylic acid copolymer dispersion neutralized with ammonia (manufactured by Sumitomo Seika Co., Ltd., Saixen AC) is 15 g / m 2 after drying. After coating on paper and pasting together a non-woven fabric (made by DuPont, Sontala spunlace 8492, basis weight 40 g / m 2 ) made of polyester fiber and cellulose fiber, it is dried to produce the wallpaper of the present invention did.
The obtained wallpaper had an air permeability of 28 seconds and had good adhesion and water-resistant adhesion.
When this wallpaper was subjected to a 90 ° C. and 90% RH condensation test, no condensation occurred.
The results are shown in Table 1.
[0021]
Comparative Example 1
The backing paper used in Example 1 was coated with a solvent-based urethane resin (Nipporan Kogyo Co., Ltd., Nippon Run 3126) so as to be 2 g / m 2 after drying, and part of the solvent was removed with a dryer. After evaporating and laminating the non-woven fabric used in Example 1 and applying heat and pressure, the non-woven wallpaper was prepared with an adhesive coating amount of 6 g / m 2 because the adhesive strength was weak.
The obtained wallpaper had good adhesive strength and water-resistant adhesive strength, but had an air permeability of 530 seconds and poor air permeability.
When this wallpaper was subjected to a 30 ° C. and 90% RH dew condensation test, dew condensation occurred.
The results are shown in Table 1.
[0022]
Comparative Example 2
The backing paper used in Example 1 was coated with a solvent-based polyester resin (byron 20SS, manufactured by Toyobo Co., Ltd.) so as to be 50 g / m 2 after drying, and part of the solvent was evaporated with a dryer. Then, the nonwoven fabric used in Example 1 was layered and heated and pressed together to produce a nonwoven wallpaper.
The obtained wallpaper had good adhesive strength and water-resistant adhesive strength, but the air permeability was 800 seconds, resulting in poor air permeability.
The results are shown in Table 1.
[0023]
Comparative Example 3
In Example 1, instead of the aqueous ethylene-acrylic acid copolymer dispersion, a polyester emulsion (Toyobo Co., Ltd., Bional MD1245) was coated except that it was dried to 2 g / m 2. By carrying out similarly to Example 1, the nonwoven fabric wallpaper was produced.
The obtained wallpaper had an air permeability of 5 seconds, but was inferior in both adhesive strength and water-resistant adhesive strength.
The results are shown in Table 1.
[0024]
Comparative Example 4
In Example 1, instead of the ethylene-acrylic acid copolymer aqueous dispersion, an ethylene emulsion (Sumitomo Chemical Co., Ltd., Sumikaflex 920) was applied except that it was dried to 15 g / m 2. By carrying out similarly to Example 1, the nonwoven fabric wallpaper was produced.
The obtained wallpaper had an air permeability of 24 seconds and good adhesive strength, but was poor in water-resistant adhesive strength.
The results are shown in Table 1.
[0025]
[Table 1]
Figure 0004392735
[0026]
【The invention's effect】
As described above, according to the present invention, there is provided a wallpaper in which an air-permeable substrate and a backing paper are bonded to each other, which has excellent adhesive force and water-resistant adhesive force and good air permeability. In particular, due to the excellent air permeability, condensation is prevented, and there is little risk of mold contamination, mites, and the like.

Claims (3)

乾燥後の塗工量が2〜15g/m のアンモニアで中和されたカルボキシル基を含有するポリオレフィン系樹脂を接着剤として、通気性基材と裏打ち紙とを貼り合わせた、透気度100秒以下の壁紙。An air permeability of 100, in which a breathable substrate and a backing paper are bonded to each other by using a polyolefin resin containing a carboxyl group neutralized with ammonia having a coating amount after drying of 2 to 15 g / m 2 as an adhesive. Wallpapers in seconds or less. ポリオレフィン系樹脂中のカルボキシル基含有モノマーが5〜50重量%である、請求項1記載の壁紙。The wallpaper of Claim 1 whose carboxyl group-containing monomer in polyolefin resin is 5 to 50 weight%. 通気性基材と裏打ち紙とを、乾燥後の塗工量が2〜15g/m のアンモニアで中和されたカルボキシル基を含有するポリオレフィン系樹脂を接着剤として、ウェットラミネート方式により貼り合わせることを特徴とする、透気度100秒以下の壁紙の製造方法。A breathable substrate and backing paper are bonded together by a wet laminating method using a polyolefin resin containing a carboxyl group neutralized with ammonia having a coating amount after drying of 2 to 15 g / m 2 as an adhesive. A method for producing wallpaper having an air permeability of 100 seconds or less.
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