JP6536172B2 - 樹脂組成物、樹脂シート、積層シート及び発泡壁紙 - Google Patents
樹脂組成物、樹脂シート、積層シート及び発泡壁紙 Download PDFInfo
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- JP6536172B2 JP6536172B2 JP2015105579A JP2015105579A JP6536172B2 JP 6536172 B2 JP6536172 B2 JP 6536172B2 JP 2015105579 A JP2015105579 A JP 2015105579A JP 2015105579 A JP2015105579 A JP 2015105579A JP 6536172 B2 JP6536172 B2 JP 6536172B2
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- 229910052749 magnesium Inorganic materials 0.000 description 1
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- ZQKXQUJXLSSJCH-UHFFFAOYSA-N melamine cyanurate Chemical compound NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 description 1
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Description
本実施形態に係る樹脂組成物は、基材と、該基材上に設けられた発泡樹脂層と、を備える発泡壁紙の発泡樹脂層を形成するための樹脂組成物であって、充填剤と、発泡剤と、発泡助剤と、樹脂分と、を含む。
本実施形態に係る樹脂シートは、上記本実施形態に係る樹脂組成物から形成されるものである。本実施形態に係る樹脂シートは、例えば、上記本実施形態に係る樹脂組成物を押出製膜して得ることができる。
本実施形態に係る積層シートは、基材と、基材上に設けられた上記樹脂シートと、を備える。当該積層シートは、樹脂シートを、基材上にラミネートして得ることができる。ラミネートの方法としては、特に限定されるものではないが、樹脂シートと基材とを、熱プレス機等を用いて熱圧着を行う方法、過熱蒸気を用いて圧着を行う方法等が挙げられる。過熱蒸気を用いて圧着を行う方法によれば、過熱蒸気によってシート状物の表面の溶融状態を保ったまま基材上へラミネートすることが可能となり、そのレベリング効果によって、密着させる基材の表面の凹凸が樹脂シートに転写されることを抑制することができる。また、樹脂シートがシラン架橋性樹脂を含む場合は、過熱蒸気によってシラン架橋性樹脂を効率よく架橋させることができる。
本実施形態に係る発泡壁紙は、基材と、基材上に設けられた発泡樹脂層と、を備える。このような発泡壁紙は、例えば、上述した樹脂シートを、基材上にラミネートして積層シートを得る工程と、上記樹脂シートに含まれる発泡剤を発泡させることにより、発泡樹脂層を形成する工程と、を備える、製造方法によって得ることができる。
(実施例1〜4、比較例1〜4)
コートハンガータイプのマニュホールドを有するTダイを用いて、スクリュー径(D)65mm、L/D=32のバリアタイプスクリューを用い、表1に示される組成(表中の数値は質量部を示す)を有する樹脂組成物を、押出温度125℃、厚み100μmで製膜し、樹脂シートをそれぞれ得た。
樹脂A:ノバテックLD LC604(日本ポリエチレン株式会社製、商品名、密度=0.918g/cm3)
樹脂B:タフマー DF140(三井化学株式会社製、商品名、密度=0.905g/cm3)
充填剤A:ソフトン1000(備北粉化工業株式会社製、商品名)
充填剤B:タイペークCR−60−2(石原産業株式会社製、商品名)
発泡助剤B:ADH(日本化成株式会社製、商品名、アジピン酸ジヒドラジド)
発泡助剤C:4−メチル安息香酸ヒドラジド(東京化成工業株式会社製、化合物名)
発泡助剤D:アデカスタブ OF−101(株式会社ADEKA製、商品名、ステアリン酸亜鉛等脂肪酸金属塩及び炭酸カルシウムの重量比1:1混合物)
作製した発泡壁紙について、下記の方法に従い、発泡倍率、インキの密着性及び変色を評価した。
発泡前の乾燥発泡樹脂層の厚さ(a)を測定し、これを初期値とした。次に発泡炉にて発泡した後の発泡壁紙の発泡樹脂層の厚さ(b)を測定し、(b)/(a)を発泡倍率として算出した。発泡倍率が6以上であれば、良好な発泡性を有するといえる。結果を表2に示す。
織物絵柄を印刷した積層シートに対して、テープ(ニチバン株式会社製、CT−24)による絵柄層の密着試験を行った。密着性に関しては、試験前と比較して絵柄層が99%以上残留しているものを「◎」、絵柄層の残留率が50%以上99%未満のものを「○」、50%未満のものを「×」とした。結果を表2に示す。
発泡後の発泡壁紙の色調を目視にて評価した。変色に関しては、比較例1の発泡壁紙と比較して差異がみられないものを「◎」、ほとんど黄変がみられないものを「○」、黄変しているものを「×」とした。結果を表2に示す。
上記と同様にして、実施例1〜4、比較例1〜4の積層シートをそれぞれ得た。これらの積層シートについて、下記の方法に従い、コロナ処理後の濡れ性及びインキに対する接触角を評価した。結果を表2に示す。
積層シートの樹脂シート側表面にコロナ放電処理を施した。コロナ放電処理した面に対し、濡れ張力試験用混合液(株式会社和光純薬製、ぬれ張力試験用混合液No.30〜No.42)を用いて、JIS K6768に記載のとおり試験を行い、樹脂シートのぬれ張力(mN/m=N/mm)を測定した。
接触角の測定は株式会社マツボー製携帯式接触角計PG−3を用いて、ハイドリックインキ(大日精化工業株式会社製、ハイドリックWP)に対する接触角を測定した。
Claims (11)
- 基材と、該基材上に設けられた発泡樹脂層と、を備える発泡壁紙の前記発泡樹脂層を形成するための樹脂組成物であって、
充填剤と、発泡剤と、発泡助剤と、樹脂分と、を含み、
前記発泡助剤が、脂肪酸金属塩の炭素鎖に活性プロトンを含む官能基を有する官能基含有脂肪酸金属塩と、カルボン酸ヒドラジドと、を含み、
前記カルボン酸ヒドラジドの含有量が、前記樹脂分100質量部に対して0.1〜7質量部である、樹脂組成物。 - 基材と、該基材上に設けられた発泡樹脂層と、を備える発泡壁紙の前記発泡樹脂層を形成するための樹脂組成物であって、
充填剤と、発泡剤と、発泡助剤と、樹脂分と、を含み、
前記発泡助剤が、脂肪酸金属塩の炭素鎖に活性プロトンを含む官能基を有する官能基含有脂肪酸金属塩と、カルボン酸ヒドラジドと、を含み、
前記カルボン酸ヒドラジドの含有量が、前記官能基含有脂肪酸金属塩100質量部に対して30〜100質量部である、樹脂組成物。 - 前記カルボン酸ヒドラジドの含有量が、前記樹脂分100質量部に対して0.1〜7質量部である、請求項2に記載の樹脂組成物。
- 前記カルボン酸ヒドラジドが、カルボン酸ジヒドラジドである、請求項1〜3のいずれか一項に記載の樹脂組成物。
- 前記官能基が、水酸基である、請求項1〜4のいずれか一項に記載の樹脂組成物。
- 前記樹脂分が、密度0.91g/cm3以上0.94g/cm3以下の低密度ポリエチレンを少なくとも含む、請求項1〜5のいずれか一項に記載の樹脂組成物。
- 前記樹脂分が、密度0.88g/cm3以上0.91g/cm3未満の超低密度ポリエチレンを更に含む、請求項6に記載の樹脂組成物。
- 請求項1〜7のいずれか一項に記載の樹脂組成物を押出製膜して得られる、樹脂シート。
- 架橋処理が施されている、請求項8に記載の樹脂シート。
- 基材と、該基材上に設けられた、請求項8又は9に記載の樹脂シートと、を備える、積層シート。
- 基材と、該基材上に設けられた発泡樹脂層と、を備える発泡壁紙であって、
請求項10に記載の積層シートにおける前記樹脂シートに含まれる発泡剤を発泡させて得られる、発泡壁紙。
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