JP2018188774A - Foamed wallpaper - Google Patents
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- JP2018188774A JP2018188774A JP2017093334A JP2017093334A JP2018188774A JP 2018188774 A JP2018188774 A JP 2018188774A JP 2017093334 A JP2017093334 A JP 2017093334A JP 2017093334 A JP2017093334 A JP 2017093334A JP 2018188774 A JP2018188774 A JP 2018188774A
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Abstract
Description
本発明は、黄色度の低い発泡壁紙に関する。 The present invention relates to a foam wallpaper having a low yellowness.
壁紙は比較的安価で且つ大量生産可能であり更に意匠も多様であることから、室内装飾材料として国内外問わず幅広く普及している。 The wallpaper is relatively inexpensive, can be mass-produced, and has a wide variety of designs. Therefore, the wallpaper is widely used as an interior decoration material regardless of whether it is inside or outside the country.
壁紙には、塩化ビニル樹脂等の塩化ビニル系樹脂やオレフィン系樹脂が多く用いられている。特に塩化ビニル系樹脂は安価で諸物性に優れ、表面に微細な凹凸を形成するエンボス加工を施すことでさらに意匠性を付与できることから専ら採用されている。 For wallpaper, vinyl chloride resins such as vinyl chloride resin and olefin resins are often used. In particular, a vinyl chloride resin has been adopted exclusively because it is inexpensive and excellent in various physical properties, and can be further imparted with design by embossing to form fine irregularities on the surface.
また発泡壁紙を得る方法としては主とし高温でガスを発生する発泡剤が使用され、なかでもアゾジカルボンアミド系発泡剤が大部分を占める。しかしながらこの発泡剤は黄色であり、加熱分解により脱色するものの、分解残渣により製品が黄味を帯びる。即ち黄色度が高くなり青白い色調を表現できない。 As a method for obtaining foam wallpaper, a foaming agent that generates gas at a high temperature is mainly used, and among them, an azodicarbonamide-based foaming agent occupies most. However, this foaming agent is yellow and decolorizes by thermal decomposition, but the product becomes yellowish due to the decomposition residue. That is, the yellowness becomes high and a pale color tone cannot be expressed.
製品が黄味を帯び黄色度が高くなることに対し、特許文献１では、カレンダーロール成形においてもペーストコーティング成形法と同等程度の高い発泡倍率とシートの白色度とを得る塩化ビニル系高発泡シートを提供することを目的とし、ＡＤＣＡ（アゾジカルボンアミド）に対して、ＯＢＳＨ（４,４'オキシビスベンゼンスルホニルヒドラジド）を７〜１８重量％混合してなる発泡剤を添加して得たポリ塩化ビニル樹脂組成物をカレンダーロール成形することが開示されている。
また、特許文献２には、紙質基材上に少なくとも発泡樹脂層を有する発泡壁紙であって、発泡剤含有樹脂層は、熱分解型発泡剤としてアゾジカルボンアミド系発泡剤とオキシビスベンゼンスルホニルヒドラジド系発泡剤とを含有し、且つ、樹脂成分としてエチレン−メタクリル酸共重合体を含有する樹脂組成物を押出し製膜することにより形成されることが開示されている。
In contrast to the fact that the product is yellowish and has a high degree of yellowness, Patent Document 1 discloses that a high-expansion sheet of vinyl chloride that obtains a high expansion ratio and whiteness of the sheet equivalent to the paste coating molding method even in calender roll molding. A polychlorination obtained by adding a foaming agent obtained by mixing 7 to 18% by weight of OBSH (4,4′-oxybisbenzenesulfonylhydrazide) to ADCA (azodicarbonamide). It is disclosed to calender roll-mold a vinyl resin composition.
Patent Document 2 discloses a foamed wallpaper having at least a foamed resin layer on a paper-based substrate, and the foaming agent-containing resin layer comprises an azodicarbonamide-based foaming agent and oxybisbenzenesulfonylhydrazide as a pyrolytic foaming agent. It is disclosed that it is formed by extrusion film formation of a resin composition containing an ethylene-based foaming agent and containing an ethylene-methacrylic acid copolymer as a resin component.
しかしながら、従来技術による壁紙においては充分な黄色度の低減を満たすことができないという課題があった。
すなわち、本発明は黄色度の低い発泡壁紙を提供することを目的とする。
However, there is a problem that the wallpaper according to the prior art cannot satisfy a sufficient reduction in yellowness.
That is, an object of the present invention is to provide a foam wallpaper having a low yellowness.
前記課題に対し鋭意検証した結果、ポリ塩化ビニル系樹脂にオキシビスベンゼンスルホニルヒドラジド系発泡剤が添加され、実質的にアゾジカルボンアミド系発泡剤が添加されない発泡ポリ塩化ビニル樹脂層と基材を積層することで、黄色度の低い発泡壁紙を得られることを見出した。前記発泡ポリ塩化ビニル樹脂層が過塩素酸金属塩を含有することも好ましい。前記発泡ポリ塩化ビニル樹脂層に使用される前記オキシビスベンゼンスルホニルヒドラジド系発泡剤が前記ポリ塩化ビニル系樹脂１００重量部に対し、０．０１〜８重量部含有していることも好ましい。前記発泡ポリ塩化ビニル樹脂層に使用される酸化チタンが前記ポリ塩化ビニル系樹脂１００重量部に対し、１〜５０重量部含有していることも好ましい。前記基材の黄色度が２．０未満であることも好ましい。また発泡壁紙の黄色度が２．０未満であることが好ましい。更に前記発泡ポリ塩化ビニル系樹脂層にヒーターエンボス機を用いてメカニカルエンボスを施す工程を備えることも本発明の発泡壁紙の製造方法として好適である。 As a result of earnest verification on the above-mentioned problems, an oxybisbenzenesulfonyl hydrazide-based foaming agent is added to a polyvinyl chloride-based resin, and a foamed polyvinyl chloride resin layer to which a azodicarbonamide-based foaming agent is substantially not added is laminated By doing so, it was found that a foam wallpaper having a low yellowness can be obtained. It is also preferable that the foamed polyvinyl chloride resin layer contains a perchloric acid metal salt. It is also preferable that the oxybisbenzenesulfonyl hydrazide foaming agent used for the foamed polyvinyl chloride resin layer contains 0.01 to 8 parts by weight with respect to 100 parts by weight of the polyvinyl chloride resin. It is also preferable that the titanium oxide used for the foamed polyvinyl chloride resin layer contains 1 to 50 parts by weight with respect to 100 parts by weight of the polyvinyl chloride resin. It is also preferred that the yellowness of the substrate is less than 2.0. The yellowness of the foam wallpaper is preferably less than 2.0. Furthermore, it is also suitable as a method for producing foamed wallpaper according to the present invention to include a step of mechanically embossing the foamed polyvinyl chloride resin layer using a heater embossing machine.
本発明は実質的にアゾジカルボンアミド系発泡剤使用せずに黄色度の低い発泡壁紙を提供することができる。 The present invention can provide a foam wallpaper having a low yellowness without substantially using an azodicarbonamide-based foaming agent.
本発明は、ポリ塩化ビニル系樹脂にオキシビスベンゼンスルホニルヒドラジド系発泡剤が添加され、実質的にアゾジカルボンアミド系発泡剤が添加されない発泡ポリ塩化ビニル樹脂層と基材を積層することが要諦である。ここで実質的にアゾジカルボンアミド系発泡剤が添加されないとはオキシビスベンゼンスルホニルヒドラジド系発泡剤の発泡性に影響を及ぼす範囲でアゾジカルボンアミド系発泡剤が添加されないことを意味する。これにより一定の発泡倍率を確保しつつ黄色度を低減可能となる。 The main point of the present invention is that the expanded polyvinyl chloride resin layer to which the oxybisbenzenesulfonylhydrazide-based foaming agent is added to the polyvinyl chloride-based resin and the azodicarbonamide-based foaming agent is not substantially added and the base material are laminated. is there. Here, the fact that the azodicarbonamide-based blowing agent is not substantially added means that the azodicarbonamide-based blowing agent is not added within a range that affects the foaming property of the oxybisbenzenesulfonylhydrazide-based blowing agent. This makes it possible to reduce the yellowness while ensuring a constant expansion ratio.
本発明に用いる発泡ポリ塩化ビニル樹脂層は、少なくともポリ塩化ビニル系樹脂及び発泡剤からなる発泡性ポリ塩化ビニル樹脂層を加熱させることで得るものである。ここで、発泡性ポリ塩化ビニル樹脂層は発泡前のポリ塩化ビニル樹脂層であり、この発泡性ポリ塩化ビニル樹脂層を加熱発泡させることで、発泡ポリ塩化ビニル樹脂層が得られる。
本発明の発泡壁紙は少なくとも基材と基材に積層された発泡ポリ塩化ビニル樹脂層で構成される。
The foamed polyvinyl chloride resin layer used in the present invention is obtained by heating a foamable polyvinyl chloride resin layer comprising at least a polyvinyl chloride resin and a foaming agent. Here, the foamable polyvinyl chloride resin layer is a polyvinyl chloride resin layer before foaming, and the foamed polyvinyl chloride resin layer is obtained by heating and foaming the foamable polyvinyl chloride resin layer.
The foamed wallpaper of the present invention comprises at least a base material and a foamed polyvinyl chloride resin layer laminated on the base material.
本発明に用いるオキシビスベンゼンスルホニルヒドラジド系発泡剤としては、ｐ，ｐ’−オキシビスベンゼンスルホニルヒドラジドが好ましい。その発泡性に影響を及ぼさない範囲に於いて添加剤を用いてもよい。 As the oxybisbenzenesulfonyl hydrazide blowing agent used in the present invention, p, p'-oxybisbenzenesulfonyl hydrazide is preferable. You may use an additive in the range which does not affect the foamability.
ここで、オキシビスベンゼンスルホニルヒドラジド系発泡剤のみを用いることが好ましい。アゾジカルボンアミド系発泡剤を用いると黄変が大きくなり好ましくない。アゾジカルボンアミド系発泡剤とはアゾジカルボンアミドからなる発泡剤であり、それ単体や物性向上のために添加物を含有するものを含む。本発明においては、アゾジカルボンアミド系発泡剤を発泡剤として有効な添加量を添加しないこととなる。すなわち、アゾジカルボンアミド系発泡剤を実質的に添加せず、オキシビスベンゼンスルホニルヒドラジド系発泡剤を用いることで黄色度の低い発泡壁紙が得られる。 Here, it is preferable to use only an oxybisbenzenesulfonyl hydrazide-based blowing agent. Use of an azodicarbonamide foaming agent is not preferable because yellowing increases. The azodicarbonamide-based foaming agent is a foaming agent composed of azodicarbonamide, and includes those containing an additive for the purpose of improving the physical properties. In the present invention, an effective addition amount of the azodicarbonamide-based foaming agent as a foaming agent is not added. That is, a foam wallpaper having a low yellowness can be obtained by using an oxybisbenzenesulfonyl hydrazide-based blowing agent without substantially adding an azodicarbonamide-based blowing agent.
発泡ポリ塩化ビニル樹脂層に過塩素酸金属塩を用いることでさらに黄色度の低い発泡壁紙を得ることができる。これは、過塩素酸金属塩が発泡ポリ塩化ビニル樹脂層のポリ塩化ビニル系樹脂の安定剤として作用するとともに、オキシビスベンゼンスルホニルヒドラジド系発泡剤による黄変を抑制していると推定している。オキシビスベンゼンスルホニルヒドラジド系発泡剤はそれ自体白色であるが、高温によって着色を呈し、また分解残渣が酸性であり且つ分解時の発熱量が多いためポリ塩化ビニル系樹脂の変色に関与するおそれがある。過塩素酸金属塩はオキシビスベンゼンスルホニルヒドラジド系発泡剤に起因する黄変を抑制すると考えられる。 By using a perchloric acid metal salt in the foamed polyvinyl chloride resin layer, a foam wallpaper having a lower yellowness can be obtained. This is presumed that the metal salt of perchlorate acts as a stabilizer for the polyvinyl chloride resin of the foamed polyvinyl chloride resin layer and suppresses yellowing due to the oxybisbenzenesulfonyl hydrazide foaming agent. . Oxybisbenzenesulfonyl hydrazide-based blowing agent is white in itself, but it is colored by high temperature, and the decomposition residue is acidic and has a large amount of heat generated during decomposition, which may be involved in discoloration of the polyvinyl chloride resin. is there. Perchloric acid metal salts are considered to suppress yellowing caused by oxybisbenzenesulfonylhydrazide-based blowing agents.
さらに発泡ポリ塩化ビニル樹脂層には過塩素酸金属塩以外の安定剤を使用することでより黄色度低下させることが可能となる。安定剤としては、例えばバリウム系安定剤、カルシウム系安定剤、スズ系安定剤、亜鉛系安定剤、カリウム系安定剤等が挙げられ、これら２種以上を併用してもよい。特に、バリウム系安定剤、カルシウム系安定剤、カリウム系安定剤と亜鉛系安定剤を併用することで黄色度を低減させつつ充分な加工性が得られるため好ましい。 Further, the use of a stabilizer other than the perchloric acid metal salt in the foamed polyvinyl chloride resin layer can further reduce the yellowness. Examples of the stabilizer include a barium stabilizer, a calcium stabilizer, a tin stabilizer, a zinc stabilizer, and a potassium stabilizer, and two or more of these may be used in combination. In particular, it is preferable to use a barium stabilizer, a calcium stabilizer, a potassium stabilizer, and a zinc stabilizer in combination, since sufficient processability can be obtained while reducing yellowness.
過塩素酸金属塩としては、過塩素酸リチウム、過塩素酸ナトリウム、過塩素酸カリウム、過塩素酸ストロンチウム、過塩素酸マグネシウム、過塩素酸カルシウム、過塩素酸バリウム、過塩素酸アンモニウムなどが挙げられる。中でも過塩素酸ナトリウム、過塩素酸カリウムが好適に用いられる。これらの過塩素酸塩類は無水物でも含水塩でもよく、ブチルジグリコール、ブチルジグリコールアジペート等のアルコール系およびエステル系の溶剤に溶かしたものおよびその脱水物でもよい。また、ハイドロタルサイトを過塩素酸で処理した過塩素酸含有ハイドロタルサイトでもよい。 Examples of perchloric acid metal salts include lithium perchlorate, sodium perchlorate, potassium perchlorate, strontium perchlorate, magnesium perchlorate, calcium perchlorate, barium perchlorate, and ammonium perchlorate. It is done. Of these, sodium perchlorate and potassium perchlorate are preferably used. These perchlorates may be anhydrous or hydrated salts, and may be those dissolved in alcoholic and esteric solvents such as butyl diglycol and butyl diglycol adipate and their dehydrates. Alternatively, perchloric acid-containing hydrotalcite obtained by treating hydrotalcite with perchloric acid may be used.
本発明に用いる発泡ポリ塩化ビニル樹脂層に使用されるオキシビスベンゼンスルホニルヒドラジド系発泡剤は、樹脂１００重量部に対し、０.０１〜８重量部含有することが好適である。０．０１重量部未満では発泡性が十分でない場合があり、８重量部超ではオキシビスベンゼンスルホニルヒドラジド系発泡剤添加による加熱変色が顕著になり十分な黄色度低減効果が達成しないことがある。安定剤として過塩素酸金属塩を使用すると黄変を抑制でき、発泡剤の添加量を上げても低い黄色度を保ち易く好適である。 The oxybisbenzenesulfonyl hydrazide-based foaming agent used for the foamed polyvinyl chloride resin layer used in the present invention is preferably contained in an amount of 0.01 to 8 parts by weight based on 100 parts by weight of the resin. If it is less than 0.01 part by weight, foamability may not be sufficient, and if it exceeds 8 parts by weight, discoloration by heating due to the addition of an oxybisbenzenesulfonylhydrazide-based foaming agent becomes remarkable and a sufficient yellowness reduction effect may not be achieved. When a perchloric acid metal salt is used as a stabilizer, yellowing can be suppressed, and a low yellowness is easily maintained even if the amount of the foaming agent is increased.
本発明に用いる発泡ポリ塩化ビニル樹脂層には酸化チタンを樹脂１００重量部に対し、１〜５０重量部含有すると隠蔽性と耐候性が向上するため好適である。１重量部未満では隠蔽性又は耐候性向上効果が得られ難く、５０重量部超では加工性低下や黄色度増加をもたらすことがある。 When the foamed polyvinyl chloride resin layer used in the present invention contains 1 to 50 parts by weight of titanium oxide with respect to 100 parts by weight of the resin, the concealability and weather resistance are improved. If it is less than 1 part by weight, it is difficult to obtain the effect of improving the concealability or weather resistance, and if it exceeds 50 parts by weight, the processability may be lowered and the yellowness may be increased.
本発明に用いる基材としては特に限定されないが、普通パルプ紙、難燃パルプ紙、炭酸カルシウム紙、水酸化アルミニウム紙、フリース紙等が挙げられる。発泡ポリ塩化ビニル樹脂層が完全には隠蔽しないことを考慮すると、黄色度の低いものの方が望ましい。本発明は発泡ポリ塩化ビニル樹脂層の黄色度を低減させるため基材の黄色度が壁紙の黄色度に影響し易く、特に基材の黄色度が２．０未満であると壁紙としての黄色度増加をもたらし難いため好適である。 Although it does not specifically limit as a base material used for this invention, Normal pulp paper, a flame-retardant pulp paper, calcium carbonate paper, aluminum hydroxide paper, fleece paper, etc. are mentioned. In consideration of the fact that the foamed polyvinyl chloride resin layer is not completely concealed, one having a low yellowness is more desirable. Since the present invention reduces the yellowness of the foamed polyvinyl chloride resin layer, the yellowness of the base material tends to affect the yellowness of the wallpaper. In particular, when the yellowness of the base material is less than 2.0, the yellowness as the wallpaper This is preferable because it is difficult to increase.
本発明の発泡壁紙は「ＪＩＳ Ｋ ７３７３」で定義される黄色度が２．０未満であることが好ましい。 The foamed wallpaper of the present invention preferably has a yellowness defined by “JIS K 7373” of less than 2.0.
ポリ塩化ビニル系樹脂としては特に制限されず、塩化ビニルを主たる構成成分とすればよいが、塩化ビニル以外の共重合成分を含んでもよい。具体的にはポリ塩化ビニル、エチレン−塩化ビニル共重合体、プロピレン−塩化ビニル共重合体、塩化ビニル−アクリル系樹脂共重合体、塩化ビニル−ウレタン共重合体、塩化ビニル−塩化ビニリデン共重合体、塩化ビニル−酢酸ビニル共重合体などが挙げられる。また、塩化ビニル系樹脂としては、ペースト用ポリ塩化ビニル系樹脂やサスペンジョンポリ塩化ビニル系樹脂を用いることができる。さらにこれらポリ塩化ビニル系樹脂を１種単独でも２種以上を組み合わせて使用してもよい。 It does not restrict | limit especially as a polyvinyl chloride-type resin, Although a vinyl chloride should just be made into a main structural component, Copolymerization components other than a vinyl chloride may also be included. Specifically, polyvinyl chloride, ethylene-vinyl chloride copolymer, propylene-vinyl chloride copolymer, vinyl chloride-acrylic resin copolymer, vinyl chloride-urethane copolymer, vinyl chloride-vinylidene chloride copolymer And vinyl chloride-vinyl acetate copolymer. Further, as the vinyl chloride resin, a polyvinyl chloride resin for paste or a suspension polyvinyl chloride resin can be used. Furthermore, these polyvinyl chloride resins may be used alone or in combination of two or more.
本発明の壁紙には、低黄色度を阻害させない限りに於いて発泡性ポリ塩化ビニル樹脂層上に印刷層を設けてもよい。印刷層を付与する方法としては公知の方法を用いることができ、例えばグラビア印刷、フレキソ印刷、オフセット印刷、シルクスクリーン印刷等が挙げられる。また印刷層の塗着性向上や低艶化の目的で、各種表面処理剤を併用してもよい。その顔料やバインダー樹脂としては公知のものを用いることができる。 The wallpaper of the present invention may be provided with a printed layer on the foamable polyvinyl chloride resin layer as long as the low yellowness is not inhibited. A known method can be used as a method for providing the print layer, and examples include gravure printing, flexographic printing, offset printing, silk screen printing, and the like. Various surface treatment agents may be used in combination for the purpose of improving the coatability of the printed layer and reducing gloss. Known pigments and binder resins can be used.
本発明の壁紙には、低黄色度を阻害させない限りに於いて発泡ポリ塩化ビニル樹脂層上に機能性付与処理層を設けてもよい。機能性付与層により付加される機能としては特に制限されないが、例えば表面強化性、抗菌性、防かび性、消臭性、アレルゲン低減化性、抗ウイルス性、防汚性等が上げられ、２種以上を併用してもよい。尚、機能性付与処理層に加え前記印刷層を付与する場合は、印刷層の上に機能性付与処理層を付与することが好ましい。 The wallpaper of the present invention may be provided with a function-imparting treatment layer on the foamed polyvinyl chloride resin layer as long as the low yellowness is not inhibited. The function added by the functionality-imparting layer is not particularly limited. For example, surface enhancement, antibacterial, antifungal, deodorant, allergen reducing, antiviral, antifouling, etc. More than one species may be used in combination. In addition, when providing the said printing layer in addition to a functional provision process layer, it is preferable to provide a functional provision process layer on a printing layer.
本発明に用いる発泡ポリ塩化ビニル樹脂層には黄色度増加をもたらさない限りに於いて、可塑剤、充填剤、着色剤、加工助剤、抗菌剤、防カビ剤、難燃剤、防炎剤、脱泡剤等の各種添加剤を適宜加えてもよい。但し蛍光増白剤は使用しない。 Unless the foamed polyvinyl chloride resin layer used in the present invention causes an increase in yellowness, a plasticizer, a filler, a colorant, a processing aid, an antibacterial agent, a fungicide, a flame retardant, a flame retardant, Various additives such as a defoaming agent may be added as appropriate. However, no optical brightener is used.
可塑剤としては特に限定されないが、例えばジー２−エチルヘキシルフタレート、ジオクチルテレフタレート、ジイソノニルフタレート、ジブチルフタレート、ジヘキシルフタレート、ジイソデシルフタレート、ブチルベンジルフタレート、トリオクチルフタレート、ジオクチルアジペート、塩素化脂肪酸エステル、塩素化パラフィン、エポキシ化大豆油、エポキシ化脂肪酸エステル、ポリエステル系等が挙げられ、２種以上を併用してもよい。 The plasticizer is not particularly limited. Epoxidized soybean oil, epoxidized fatty acid ester, polyester type and the like may be mentioned, and two or more kinds may be used in combination.
本発明の発泡壁紙の製造方法としては公知の方法が用いることができるが、例えば基材上にコーティング法又はカレンダー法にて発泡性ポリ塩化ビニル樹脂層を積層した後、グラビア印刷、フレキソ印刷、オフセット印刷、シルクスクリーン印刷等で印刷を付与し、ヒーターエンボス機または発泡エンボス機にて発泡性ポリ塩化ビニル樹脂層から発泡ポリ塩化ビニル樹脂層への移行とメカニカルエンボスを得ることが挙げられる。特にメカニカルエンボスを施す場合、ヒーターエンボス機を使用すると黄色度増加を抑制しやすく好ましい。 A known method can be used as a method for producing the foamed wallpaper of the present invention. For example, after laminating a foamable polyvinyl chloride resin layer on a substrate by a coating method or a calendering method, gravure printing, flexographic printing, For example, printing is applied by offset printing, silk screen printing, and the like, and a transition from a foamable polyvinyl chloride resin layer to a foamed polyvinyl chloride resin layer and mechanical embossing are obtained with a heater embossing machine or a foaming embossing machine. In particular, when mechanical embossing is performed, it is preferable to use a heater embossing machine because it is easy to suppress an increase in yellowness.
以下に、本発明を実施例により詳細に説明するが、本発明はこれら実施例に制限されるものではない。 EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples.
実施例１では、基材として裏打紙Ａ（黄色度１．４４）を用い、表１に示す如く所定量でポリ塩化ビニル樹脂、ｐ，ｐ’−オキシビスベンゼンスルホニルヒドラジド、ジー２−エチルヘキシルフタレート、バリウム−亜鉛系安定剤、過塩素酸ナトリウム系安定剤、炭酸カルシウム及び酸化チタンを混合したペーストゾルを、ペーストコーターで塗布することで基材上に発泡性ポリ塩化ビニル樹脂層を付与した。その後、ヒーターエンボス機を用いて発泡性ポリ塩化ビニル樹脂層を発泡ポリ塩化ビニル樹脂層へ移行させメカニカルエンボスを施した。 In Example 1, backing paper A (yellowness 1.44) was used as a base material, and polyvinyl chloride resin, p, p'-oxybisbenzenesulfonylhydrazide, di-2-ethylhexyl phthalate were used in predetermined amounts as shown in Table 1. A paste sol in which a barium-zinc stabilizer, a sodium perchlorate stabilizer, calcium carbonate and titanium oxide were mixed was applied with a paste coater to give a foamable polyvinyl chloride resin layer on the substrate. Thereafter, the foamable polyvinyl chloride resin layer was transferred to the foamed polyvinyl chloride resin layer using a heater embossing machine, and mechanical embossing was performed.
実施例２乃至７の詳細は表１に、比較例１乃至３の詳細は表２にそれぞれ示した通りであり、製造方法は実施例１に準拠した。 The details of Examples 2 to 7 are as shown in Table 1, the details of Comparative Examples 1 to 3 are as shown in Table 2, and the production method was in accordance with Example 1.
［黄色度評価］
得られた発泡壁紙の黄色度を「ＪＩＳ Ｋ ７３７３」に準拠しスガ試験機（株）製ＳＭカラーコンピューターを用いて測定した。
[Yellowness evaluation]
The yellowness of the resulting foamed wallpaper was measured using an SM color computer manufactured by Suga Test Instruments Co., Ltd. according to “JIS K 7373”.
［評価結果］
実施例１乃至６は、黄色度を２．０未満に低減させており、本発明の特に好ましい実施形態である。実施例７は裏打紙の黄色度が７．６７と高いものであっても壁紙の黄色度を約２．０に低減できることを示している。
[Evaluation results]
Examples 1 to 6 reduce the yellowness to less than 2.0 and are particularly preferred embodiments of the present invention. Example 7 shows that even if the yellowness of the backing paper is as high as 7.67, the yellowness of the wallpaper can be reduced to about 2.0.
これに対し、比較例１乃至３ではアゾジカルボンアミドを発泡剤として使用しているため黄色度が３．５９−４．８４と高くなっている。特に実施例３はオキシビスベンゼンスルホニルヒドラジドを含むが、アゾジカルボンアミドと併用するため黄色度が３．８７に止まっている。 On the other hand, in Comparative Examples 1 to 3, azodicarbonamide is used as a foaming agent, so the yellowness is as high as 3.59 to 4.84. In particular, Example 3 contains oxybisbenzenesulfonyl hydrazide, but has a yellowness of 3.87 because it is used in combination with azodicarbonamide.
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| JPH02234999A (en) * | 1989-03-08 | 1990-09-18 | Sanyo Kokusaku Pulp Co Ltd | Rag lining for wall paper having low change of color and vinyl chloride wall paper using the rag lining |
| JPH04299132A (en) * | 1991-03-28 | 1992-10-22 | Toppan Printing Co Ltd | Manufacture of foamed decorative material |
| WO2007058152A1 (en) * | 2005-11-15 | 2007-05-24 | Toray Industries, Inc. | Matte multilayer polyester film |
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