Organic resin non-crimped staple fiber

Patent metadata

Field	Value
Publication number	US-2016177476-A1
Application number	US-201414889970-A
Country	US
Kind code	A1
Filing date	May 27, 2014
Priority date	May 30, 2013
Publication date	Jun 23, 2016
Grant date	—

Abstract

The present invention is intended to provide an organic resin non-crimped staple fiber that has notably few defects and that uniformly disperses in a dispersion medium, and that is preferred for use in wet-laid nonwoven fabrics or resin reinforcement in applications such as in industrial materials and daily commodities. The organic resin non-crimped staple fiber of the present invention has a fineness of 0.0001 to 0.6 decitex, a fiber length of 0.01 to 5.0 millimeters, a moisture content of 10 to 200 weight %, a cut-end coefficient of 1.00 to 1.40, and a coefficient of variation relative to fiber length (CV %) of 0.0 to 15.0%, the cut-end coefficient and the coefficient of variation relative to fiber length being defined as follows: (1) Cut-End Coefficient=b/a, wherein a is the fiber diameter of a single yarn of the non-crimped staple fiber, and b is the maximum diameter at the cut end; (2) Coefficient of Variation Relative to Fiber Length (CV %)=(standard deviation of fiber length)/(mean value of fiber length)×100(%), wherein the number of measured single yarns is 50 in (1) and (2). The foregoing object can be achieved with this configuration.

First claim

1 - 4 . (canceled)

5 . An organic resin non-crimped staple fiber for wet-laid nonwoven fabrics,
the organic resin non-crimped staple fiber having a fineness of 0.0001 to 0.6 decitex, a fiber length of 1.0 to 5.0 millimeters, a moisture content of 10 to 100 weight %, a cut-end coefficient of 1.00 to 1.40, and a coefficient of variation relative to fiber length (CV %) of 0.0 to 15.0%, the cut-end coefficient, and the coefficient of variation relative to fiber length being defined as follows:
Cut-End Coefficient= b/a,   (1)

wherein a is the fiber diameter of a single yarn of the non-crimped staple fiber, and b is the maximum diameter at the cut end;
Coefficient of Variation Relative to Fiber Length( CV %)=(standard deviation of fiber length)/(mean value of fiber length)×100(%),  (2)

wherein the number of measured single yarns is 50 in (1) and (2).

6 . The organic resin non-crimped staple fiber according to claim 5 , wherein the non-crimped staple fiber is a polyester non-crimped staple fiber, a wholly aromatic polyamide non-crimped staple fiber, or a polyolefin non-crimped staple fiber.

7 . The organic resin non-crimped staple fiber according to claim 5 , wherein the non-crimped staple fiber is a polyethylene terephthalate non-crimped staple fiber, a polytrimethylene terephthalate non-crimped staple fiber, a polytetramethylene terephthalate non-crimped staple fiber, a polyethylene naphthalate non-crimped staple fiber, a polytrimethylene naphthalate non-crimped staple fiber, a polytetramethylene naphthalate non-crimped staple fiber, a meta-type wholly aromatic polyamide non-crimped staple fiber, a para-type wholly aromatic polyamide non-crimped staple fiber, a polyethylene non-crimped staple fiber, or a polypropylene non-crimped staple fiber.

8 . The organic resin non-crimped staple fiber according to claim 5 , wherein the non-crimped staple fiber is a conjugate fiber configured from two or more organic resins.

9 . The organic resin non-crimped staple fiber according to claim 6 , wherein the non-crimped staple fiber is a polyethylene terephthalate non-crimped staple fiber, a polytrimethylene terephthalate non-crimped staple fiber, a polytetramethylene terephthalate non-crimped staple fiber, a polyethylene naphthalate non-crimped staple fiber, a polytrimethylene naphthalate non-crimped staple fiber, a polytetramethylene naphthalate non-crimped staple fiber, a meta-type wholly aromatic polyamide non-crimped staple fiber, a para-type wholly aromatic polyamide non-crimped staple fiber, a polyethylene non-crimped staple fiber, or a polypropylene non-crimped staple fiber.

Assignees

• Teijin Ltd

Inventors

• Ban Noritaka
• Goda Hironori
• Takahashi Shinichi

Classifications

• D01F6/62 Primary

  from polyesters · CPC title

• D01F6/04

  from polyolefins · CPC title

• D04H1/00

  Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres · CPC title

• D01F8/04

  from synthetic polymers · CPC title

• D01F6/605

  from aromatic polyamides · CPC title