US 12,286,732 B2
Pile fabric and manufacturing method therefor
Yusuke Hirai, Hyogo (JP); Nobutaka Taoka, Hyogo (JP); Hiroyuki Shinbayashi, Hyogo (JP); and Hiroyuki Tokumoto, Osaka (JP)
Assigned to KANEKA CORPORATION, Osaka (JP)
Filed by KANEKA CORPORATION, Osaka (JP)
Filed on Apr. 14, 2022, as Appl. No. 17/720,637.
Application 17/720,637 is a continuation of application No. PCT/JP2020/045222, filed on Dec. 4, 2020.
Claims priority of application No. 2019-233718 (JP), filed on Dec. 25, 2019.
Prior Publication US 2022/0235500 A1, Jul. 28, 2022
Int. Cl. D04B 1/04 (2006.01); D04B 1/02 (2006.01)
CPC D04B 1/04 (2013.01) [D04B 1/025 (2013.01); D10B 2331/04 (2013.01); D10B 2501/044 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A pile knitted fabric, comprising:
a knitted pile portion that comprises a long pile portion and a short pile portion, wherein
an average pile length of the long pile portion differs from an average pile length of the short pile portion by 2 mm or more,
the long pile portion comprises crimped polyester-based fibers in an amount of 60% by weight or more,
the short pile portion comprises crimped polyester-based fibers in an amount of 60% by weight or more,
a crimp removal temperature of the crimped polyester-based fibers of the long pile portion is lower than a crimp removal temperature of the crimped polyester-based fibers of the short pile portion,
the crimp removal temperature of the crimped polyester-based fibers of the short pile portion is 90° C. or more and 120° C. or less, and
each of the crimp removal temperatures indicates a minimum temperature that satisfies the following numerical formula (1):
(A−B)/A×100<3(%)  (1)
where, in the formula (1),
A represents a length of a fiber bundle of the crimped polyester-based fibers under a load of 4 mg/dtex after the fiber bundle is subjected to dry heat treatment at a predetermined temperature for 60 seconds under a load of 4 mg/dtex, and
B represents a length of the fiber bundle of the crimped polyester-based fibers under no load after the fiber bundle is subjected to the dry heat treatment at the predetermined temperature for 60 seconds under a load of 4 mg/dtex.