JPWO2006134966A1 - 人工皮革用基材およびその製造方法 - Google Patents
人工皮革用基材およびその製造方法 Download PDFInfo
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- JPWO2006134966A1 JPWO2006134966A1 JP2007521322A JP2007521322A JPWO2006134966A1 JP WO2006134966 A1 JPWO2006134966 A1 JP WO2006134966A1 JP 2007521322 A JP2007521322 A JP 2007521322A JP 2007521322 A JP2007521322 A JP 2007521322A JP WO2006134966 A1 JPWO2006134966 A1 JP WO2006134966A1
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- fiber
- artificial leather
- nonwoven fabric
- base material
- ultrafine
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- D—TEXTILES; PAPER
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
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- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T442/608—Including strand or fiber material which is of specific structural definition
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-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/637—Including strand or fiber material which is a monofilament composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
- Y10T442/64—Islands-in-sea multicomponent strand or fiber material
Abstract
Description
(1)不織布中、厚み方向と平行な任意の断面において、厚み方向に配向した繊維束が巾1cmあたり75〜300本の範囲で存在する
(2)不織布中、厚み方向と直交する任意の断面において、厚み方向に配向した繊維束が1mm2あたり30〜800本の範囲で存在する
を満足する人工皮革用基材に関する。
(1)平均単繊度0.5デシテックス以下の極細繊維を発生し得る極細繊維発生型繊維を繊維ウェブとする工程;
(2)該繊維ウェブの少なくとも一面にブラシ先端部が接するようにブラシベルトを配置し、該繊維ウェブ内から突出する極細繊維発生型繊維を該ブラシ中に把持しながら該繊維ウェブをニードルパンチングして絡合不織布を得る工程;
(3)該絡合不織布に高分子弾性体を含有させる工程;および
(4)該極細繊維発生型繊維を平均単繊度0.5デシテックス以下の極細繊維の繊維束に変換する工程を含む人工皮革用基材の製造方法に関する。
P=([η]103/8.29)(1/0.62)
繊維を形成する樹脂の密度と、数百倍〜数千倍程度の倍率の走査型電子顕微鏡写真から求めた繊維の断面積とから算出した。
DSC(TA3000、メトラー社製)測定器を用いて、窒素中、昇温速度10℃/分で300℃まで昇温後、室温まで冷却し、再度昇温速度10℃/分で300℃まで昇温した場合に得られた吸熱曲線のピークトップ温度を融点とした。
人工皮革用基材を形成する不織布の厚み方向と平行な任意の断面上の連続する10ヵ所を60倍の倍率で電子顕微鏡にて撮影した。得られた写真を500%に拡大し、厚み方向と直交する線分の長さ1cmの間に存在する繊維束の数(1cmの線分と交差する繊維束の数)を目視で数え、10ヵ所の平均値を算出した。図1に、実施例1で得られた人工皮革用基材の厚み方向と平行な断面の電子顕微鏡写真を示した。図1において、参照番号1が厚み方向に配向した繊維束を示す。
人工皮革用基材を形成する不織布の厚み方向と直交する断面(人工皮革用基材表面に平行な断面)の連続する10ヵ所を300倍の倍率で電子顕微鏡にて撮影した。得られた写真を500%に拡大し、1mm2あたりの繊維束断面の数を目視で数え、10ヵ所の平均値を算出した。図2に、実施例1で得られた人工皮革用基材の厚み方向と直交する断面の電子顕微鏡写真を示した。図2において、参照番号1が示す円形部分が、厚み方向に配向した1つの繊維束の断面を示す。
不織布表面の連続する10ヵ所を電子顕微鏡にて100倍の倍率で撮影した。得られた写真を500%に拡大し、1mm2あたりの極細繊維発生型繊維の切断部分の個数を目視で数え、10ヵ所の平均値を算出した。
5人のパネリストにより試料(銀付調人工皮革)を下記の基準で評価した。
A:ソフトで反発感の無い風合い。
B:ソフトであるが反発感の有る風合い。
C:硬く反発感の有る風合い。
縦横各4cmの試料(銀付調人工皮革)の縦方向(または横方向)の両側縁部の端から1cmの部分を把持し、該把持部の間隔を、銀面が内側に折れ曲がるように2cmから1cmにまで狭めた際の、銀面に発生する座屈皺の本数を目視にて確認し、下記基準に従って判定を行った。
A:座屈皺が0〜2本のもの。
B:座屈皺が3〜4本のもの。
C:座屈皺が5〜7本のもの。
D:座屈皺が8本以上のもの。
水溶性熱可塑性ポリビニルアルコール系樹脂の製造
攪拌機、窒素導入口、エチレン導入口および開始剤添加口を備えた100L加圧反応槽に酢酸ビニル29.0kgおよびメタノール31.0kgを仕込み、60℃に昇温した後30分間窒素バブリングして反応系を窒素置換した。次いで反応槽圧力が5.9kgf/cm2となるようにエチレンを導入した。2,2’−アゾビス(4−メトキシ−2,4−ジメチルバレロニトリル)をメタノールに溶解して濃度2.8g/Lの開始剤溶液を調整し、窒素ガスによるバブリングを行って窒素置換した。上記の重合槽内温を60℃に調整した後、上記の開始剤溶液170mlを注入し重合を開始した。重合中、エチレンを導入して反応槽圧力を5.9kgf/cm2に、重合温度を60℃に維持し、上記の開始剤溶液を610ml/hrで連続添加した。10時間後に重合率が70%となったところで冷却して重合を停止した。
上記水溶性熱可塑性PVA(エチレン変性PVA)を海成分に用い、イソフタル酸変性度6モル%のポリエチレンテレフタレ−トを島成分とし、極細繊維発生型繊維1本あたりの島数が25島となるような溶融複合紡糸用口金から260℃で海成分/島成分の質量比30/70で吐出した。紡糸速度が4500m/minとなるようにエジェクター圧力を調整し、長繊維をネットで捕集し、平均繊度2.0デシテックスの極細繊維発生型繊維からなる目付30g/m2の長繊維ウェブを得た。
実施例1で用いた長繊維ウェブ20枚をクロスラッピングにより重ね合わせ、針折れ防止油剤をスプレー付与した。次いで、針先端からバーブまでの距離が3mmのクラウン針を用い、針深度10mmにて両面から合計500P/cm2のベロアニードルパンチングを行った後、針先端からバーブまでの距離が3mmの1バーブ針を用い、針深度8mmにて両面から交互に1000P/cm2のニードルパンチを行い、長繊維絡合不織布を得た。
実施例1で得た人工皮革用基材の表面をサンドペーパーを用いて起毛処理しスエード調人工皮革を得た。得られたスエード調人工皮革は、反発感のないやわらかさと腰の有る風合いを兼ね備えると共に、きめ細やかな表面タッチと優美なライティング効果を有するスエード調人工皮革であった。
絡合処理にベロアニードルパンチングを採用せず、針先端からバーブまでの距離が3mm、スロートデプスが0.04mmの1バーブ針を用い、針深度8mmにて両面から交互に3000P/cm2のニードルパンチングのみを行った以外は実施例1と同様にして銀付き調人工皮革を作製した。得られた銀付き調人工皮革は、風合いはよいものの、折れシワが発生しやすく、充実感が不足したものであった。
絡合処理にベロアニードルパンチングを採用せず、針先端からバーブまでの距離が3mm、スロートデプスが0.04mmの1バーブ針を用い、針深度8mmにて両面から交互に3000P/cm2のニードルパンチングのみを行った以外は実施例2と同様にして銀付き調人工皮革を作製した。得られた銀付き調人工皮革は、風合いはよいものの、折れシワが発生しやすく、充実感が不足したものであった。
絡合処理にベロアニードルパンチングを採用せず、針先端からバーブまでの距離が3mm、スロートデプスが0.08mmの9バーブ針を用い、針深度8mmにて両面から交互に3000P/cm2のニードルパンチングのみを行った以外は実施例1と同様にして銀付き調人工皮革を作製した。ニードルパンチング後の絡合不織布は針穴が目立ち、繊維損傷により表面が毛羽立ち、平滑性が不良である外観を有し、比重は0.24と高いものであった。得られた銀付き調人工皮革は、風合いが硬く、折れシワが発生しやすく、充実感が不足したものであった。
Claims (11)
- 平均単繊度0.5デシテックス以下の極細繊維の繊維束からなる不織布、および、その内部に含有される高分子弾性体からなる人工皮革用基材であり、下記(1)〜(2):
(1)該不織布の厚み方向と平行な任意の断面において、厚み方向に配向した繊維束が、厚み方向に直交する線分1cmあたり75〜300本の範囲で存在する
(2)該不織布の厚み方向と直交する任意の断面において、厚み方向に配向した繊維束の断面が1mm2あたり30〜800個の範囲で存在する
の条件を満足することを特徴とする人工皮革用基材。 - 前記極細繊維が長繊維である請求項1記載の人工皮革用基材。
- さらに下記(3):
(3)前記不織布表面に、該繊維束の切断部分が4個/mm2以下の範囲で存在する
の条件を満足する請求項1または2に記載の人工皮革用基材。 - 前記高分子弾性体が該高分子弾性体の水系エマルジョンを含浸し、次いで、凝固することにより形成されたものである請求項1〜3のいずれかに記載の人工皮革用基材。
- 前記極細繊維の繊維束が水溶性熱可塑性ポリビニルアルコール系樹脂を一成分として含有する極細繊維発生型繊維から該水溶性熱可塑性ポリビニルアルコール系樹脂を抽出除去することにより形成されたものである請求項1〜4いずれかに記載の人工皮革用基材。
- 前記水溶性熱可塑性ポリビニルアルコール系樹脂の平均重合度が200〜500、ケン化度が90〜99.99モル%および融点が160℃〜230℃である請求項5に記載の人工皮革用基材。
- 請求項1〜6いずれかに記載の人工皮革用基材の少なくとも1方の面に被覆層を形成してなる銀付き調人工皮革。
- 請求項1〜6いずれかに記載の人工皮革用基材の少なくとも1方の面を起毛してなるスエード調人工皮革。
- 下記(1)〜(4)の工程を含む人工皮革用基材の製造方法。
(1)平均単繊度0.5デシテックス以下の極細繊維を発生し得る極細繊維発生型繊維を繊維ウェブとする工程;
(2)該繊維ウェブの少なくとも一面にブラシ先端部が接するようにブラシベルトを配置し、該繊維ウェブ内から突出する極細繊維発生型繊維を該ブラシ中に把持しながら該繊維ウェブをニードルパンチングして絡合不織布を得る工程;
(3)該絡合不織布に高分子弾性体を含有させる工程;および
(4)該極細繊維発生型繊維を平均単繊度0.5デシテックス以下の極細繊維の繊維束に変換する工程。 - 前記工程(2)を、該絡合不織布表面における該極細繊維発生型繊維の切断部分の個数が4個/mm2以下になるように行う請求項9に記載の人工皮革用基材の製造方法。
- 前記工程(2)において、該突出した極細繊維発生型繊維がループ状の起毛面を形成するように、該突出した極細繊維発生型繊維を該ブラシベルトのベルト中に把持する請求項9または10に記載の人工皮革用基材の製造方法。
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KR100534525B1 (ko) * | 2002-02-01 | 2005-12-07 | 주식회사 코오롱 | 저신장성 및 유연성이 우수한 인공피혁용 복합시트 |
KR101027365B1 (ko) * | 2002-08-22 | 2011-04-11 | 데이진 고도레 가부시키가이샤 | 피혁형 시트상물 및 그 제조 방법 |
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WO2006134966A1 (ja) | 2006-12-21 |
US8053060B2 (en) | 2011-11-08 |
CN101198742B (zh) | 2010-12-08 |
KR20080017370A (ko) | 2008-02-26 |
EP1895044A4 (en) | 2010-03-24 |
TW200710305A (en) | 2007-03-16 |
KR101242361B1 (ko) | 2013-03-14 |
JP4869228B2 (ja) | 2012-02-08 |
US20090087618A1 (en) | 2009-04-02 |
EP1895044B1 (en) | 2011-11-30 |
CN101198742A (zh) | 2008-06-11 |
TWI422728B (zh) | 2014-01-11 |
EP1895044A1 (en) | 2008-03-05 |
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