JP4289216B2 - 混繊ポリウレタン弾性糸、その製法、及び伸縮性繊維構造物 - Google Patents
混繊ポリウレタン弾性糸、その製法、及び伸縮性繊維構造物 Download PDFInfo
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- JP4289216B2 JP4289216B2 JP2004150212A JP2004150212A JP4289216B2 JP 4289216 B2 JP4289216 B2 JP 4289216B2 JP 2004150212 A JP2004150212 A JP 2004150212A JP 2004150212 A JP2004150212 A JP 2004150212A JP 4289216 B2 JP4289216 B2 JP 4289216B2
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- fiber
- polyurethane
- elastic
- mixed
- fibers
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Description
さらに詳しくは、熱接着工程を通すことによって熱接着させることができ、かつ、熱接着工程を通した後も高い弾性回復性を有する混繊ポリウレタン弾性糸、その製法、及び、その混繊ポリウレタン弾性糸と他の繊維等からなる伸縮性繊維構造物に関するものである。
また、こうしたポリオールは単独で使用してもよいし、2種以上を混合もしくは共重合させて用いてもよい。伸度、強度、弾性回復力、耐熱性に優れたポリウレタン系弾性繊維を得る観点から、このポリオールの数平均分子量は1000以上8000以下の範囲にあるのが好ましく、1800以上6000以下の範囲にあるのがより好ましい。
分子量1800のポリテトラメチレンエーテルグライコールとMDIとを付加比率が1.58になるように容器に仕込み、90℃で反応せしめ、得られた反応生成物をN,N−ジメチルアセトアミド(DMAc)に溶解させた。次に、エチレンジアミン及びジエチレンアミンを含むDMAc溶液を、前記反応物が溶解した溶液に添加して、ポリマ中の固体分が35重量%であるポリウレタンウレア溶液を調製した。
実施例1で得られたポリウレタンウレア弾性繊維1本とポリウレタン弾性繊維3本とを引きそろえ、次いで、ドラフト2.0で200℃のチューブヒーターを通して熱延伸し、巻き取った。得られた混繊糸中において、ポリウレタン弾性繊維とポリウレタンウレア弾性繊維はほぼ熱接着していた。見かけとしては1本の糸状であり、糸条繊度は105dtexで、延伸されていた。この混繊糸において、ポリウレタンウレア弾性繊維の比率は約81%であった。
THFと3−メチルTHFとを共重合させてなる共重合PTMG(THFの共重合割合12.5モル%、分子量3500)とMDIとを付加比率が3.5となるように容器に仕込み、90℃で反応せしめ、得られた反応生成物をDMAcに溶解させた。次に、鎖伸長剤である1,4ブタンジオールを含むDMAc溶液を、前記反応物が溶解した溶液に添加して、ポリマ中の固体分が40重量%であるポリウレタン溶液を調製した。
実施例1で得られたポリウレタンウレア溶液を実施例1と同様にして乾式紡糸し、合着させ、570m/分のスピードで巻き取り、2フィラメントが合着した25dtexのポリウレタンウレア弾性繊維を製造した。得られた弾性繊維のTMH(DSC測定による)は約275℃であった。また、このポリウレタン弾性繊維の熱変形温度は、約195℃であった。
Claims (12)
- 高温側の融点が10℃以上相違する少なくとも2種のポリウレタン系弾性繊維からなる混繊ポリウレタン弾性糸。
- 高温側の融点が10℃以上相違する少なくとも2種のポリウレタン系弾性繊維のうちの少なくとも一方が、2本以上の繊維が合着されたものであることを特徴とする請求項1に記載の混繊ポリウレタン弾性糸。
- 混繊ポリウレタン弾性糸を構成する少なくとも2種のポリウレタン系弾性繊維どうしが少なくとも部分的に融着していることを特徴とする請求項1〜2のいずれかに記載の混繊ポリウレタン弾性糸。
- 混繊ポリウレタン弾性糸中において、高温側の融点が高いポリウレタン系弾性繊維の重量比率が40〜98%であることを特徴とする請求項1〜3のいずれかに記載の混繊ポリウレタン弾性糸。
- 高温側の融点が高いポリウレタン系弾性繊維における高温側の融点が250℃以上であることを特徴とする請求項1〜4のいずれかに記載の混繊ポリウレタン弾性糸。
- 高温側の融点が高いポリウレタン系弾性繊維が、ポリウレタンウレアから成る弾性繊維であり、かつ、高温側の融点が低いポリウレタン系弾性繊維が、ポリウレタンからなる弾性繊維であることを特徴とする請求項1〜5のいずれかに記載の混繊ポリウレタン弾性糸。
- ポリウレタンウレアからなる弾性繊維が、下記(1)のポリオール、ジフェニルメタンジイソシアネート、及び下記(2)の鎖伸長剤から重合されたポリウレタンウレアからなる弾性繊維であり、かつ、ポリウレタンからなる弾性繊維が、下記(1)のポリオール、ジフェニルメタンジイソシアネート、及び下記(3)の鎖伸長剤から重合されたポリウレタンからなる弾性繊維であることを特徴とする請求項6に記載の混繊ポリウレタン弾性糸。
(1): ポリテトラメチレンエーテルグライコール、および/または共重合ポリテトラメチレンエーテルグライコール、
(2): エチレンジアミン、プロピレンジアミン、ジアミノジフェニルメタンのうちの1種以上、
(3): エチレングリコール、1,4ブタンジオール、1,3プロパンジオール、1,6ヘキサンジオールのうちの1種以上 - 混繊ポリウレタン弾性糸中のポリウレタンウレアから成る弾性繊維が、乾式紡糸により製造された弾性繊維であることを特徴とする請求項6又は7に記載の混繊ポリウレタン弾性糸。
- 高温側の融点が10℃以上相違する少なくとも2種のポリウレタン系弾性繊維を引きそろえた後、巻き取ることを特徴とする混繊ポリウレタン弾性糸の製法。
- 高温側の融点が10℃以上相違する少なくとも2種のポリウレタン系弾性繊維を引きそろえて交絡処理した後、巻き取ることを特徴とする混繊ポリウレタン弾性糸の製法。
- 高温側の融点が10℃以上相違する少なくとも2種のポリウレタン系弾性繊維を引きそろえた後、高温側の融点が低いポリウレタン系弾性繊維の熱変形温度以上の温度で、熱処理及び/又は1.5倍以上の熱延伸を行い、両弾性繊維どうしを少なくとも部分的に融着させることを特徴とする混繊ポリウレタン弾性糸の製法。
- 請求項1〜8のいずれかに記載の混繊ポリウレタン弾性糸と他の繊維もしくは他の繊維製布帛状物とから構成される繊維構造物であって、混繊ポリウレタン弾性糸と他の繊維もしくは他の繊維製布帛状物とが熱接着していることを特徴とする伸縮性繊維構造物。
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