US2011136402A1PendingUtilityA1

Continuous fiber nonwoven fabric

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Assignee: MITSUI CHEMICALS INCPriority: Sep 1, 2008Filed: Aug 26, 2009Published: Jun 9, 2011
Est. expirySep 1, 2028(~2.1 yrs left)· nominal 20-yr term from priority
Inventors:Akio MatsubaraTetsuya YokoyamaKenichi SuzukiShigeyuki Motomura
D01F 6/06D04H 3/007D01D 5/24D04H 3/073Y10T442/612
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Claims

Abstract

The invention has an object of providing a continuous fiber nonwoven fabric including a hollow fiber having excellent strength, in particular mono-filament strength, and having high hollowness even when formed to a fine filament. A continuous fiber nonwoven fabric includes a hollow fiber including a propylene polymer having a ratio of the Z average molecular weight (Mz) and the weight average molecular weight (Mw), (Mz/Mw), in the range of 1.5 to 1.9, and in a preferred embodiment having a ratio of the weight average molecular weight (Mw) and the number average molecular weight (Mn), (Mw/Mn), in the range of 2.0 to 2.9.

Claims

exact text as granted — not AI-modified
1 . A continuous fiber nonwoven fabric which comprises a hollow fiber comprising a propylene polymer having a ratio of the Z average molecular weight (Mz) and the weight average molecular weight (Mw), (Mz/Mw), in the range of 1.5 to 1.9. 
     
     
         2 . The continuous fiber nonwoven fabric according to  claim 1 , wherein the propylene polymer has a ratio of the weight average molecular weight (Mw) and the number average molecular weight (Mn), (Mw/Mn), in the range of 2.0 to 2.9. 
     
     
         3 . The continuous fiber nonwoven fabric according to  claim 1 , wherein the hollow fiber has a hollow cross section wherein the fiber diameter is 15 to 50 μm and the hollowness is 5 to 50%. 
     
     
         4 . A continuous fiber nonwoven fabric which comprises a propylene polymer fiber having a hollow cross section wherein the fiber diameter is 15 to 24 μm and the hollowness is 22 to 35%. 
     
     
         5 . The continuous fiber nonwoven fabric according to  claim 1 , wherein the hollow fiber has a hollow cross section wherein the fiber diameter is 15 to 24 μm and the hollowness is 22 to 35%. 
     
     
         6 . The continuous fiber nonwoven fabric according to  claim 2 , wherein the hollow fiber has a hollow cross section wherein the fiber diameter is 15 to 24 μm and the hollowness is 22 to 35%. 
     
     
         7 . The continuous fiber nonwoven fabric according to  claim 2 , wherein the hollow fiber has a hollow cross section wherein the fiber diameter is 15 to 50 μm and the hollowness is 5 to 50%.

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