US2022186404A1PendingUtilityA1

Artificial hair fibers

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Assignee: DENKA COMPANY LTDPriority: Jul 19, 2019Filed: Jun 1, 2020Published: Jun 16, 2022
Est. expiryJul 19, 2039(~13 yrs left)· nominal 20-yr term from priority
Inventors:Takashi MuraokaAtsushi Takei
D01F 6/60D01F 6/90D01F 1/07D02J 1/22D01F 1/10D01F 6/92A41G 3/0083D10B 2503/08D01D 5/10D10B 2331/021D01F 8/12
51
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Claims

Abstract

An artificial hair fiber suppressed in formation of nodes is provided. An artificial hair fiber is structured with a fiber of drawn resin composition; wherein: when an initial tensile stress of undrawn fiber at 100° C. is taken as F0, and a tensile stress when drawn by 2.5 times is taken as F1, F1/F0 of an undrawn fiber obtained by spinning the resin composition is 1.2 or more.

Claims

exact text as granted — not AI-modified
1 . An artificial hair fiber structured with a fiber of drawn resin composition; wherein:
 when an initial tensile stress of undrawn fiber at 100° C. is taken as F0, and a tensile stress when drawn by 2.5 times is taken as F1,   F1/F0 of an undrawn fiber obtained by spinning the resin composition is 1.2 or more.   
     
     
         2 . The artificial hair fiber of  claim 1 , wherein:
 the resin composition comprises a base resin including a first resin; and   F1/F0 of an undrawn fiber obtained by spinning the first resin is 1.3 or more.   
     
     
         3 . The artificial hair fiber of  claim 2 , wherein the first resin in the base resin is contained by 50 mass % or more. 
     
     
         4 . The artificial hair fiber of  claim 2 , wherein the first resin is polyamide. 
     
     
         5 . The artificial hair fiber of  claim 3 , wherein the first resin is polyamide.

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