Fiber, fabric, and nonwoven fabric

Patent metadata

Field	Value
Publication number	US-2016002826-A1
Application number	US-201414769701-A
Country	US
Kind code	A1
Filing date	Feb 20, 2014
Priority date	Feb 22, 2013
Publication date	Jan 7, 2016
Grant date	—

Abstract

To provide: a fiber having excellent adhesiveness, which is able to be bonded to a polar resin, a resin containing an inorganic filler (especially a glass fiber), a ceramic, glass, a metal or the like, without being subjected to a primer treatment or the like; and a nonwoven fabric. A fiber which is formed of a thermoplastic polymer composition that contains (A) a block copolymer which has (a1) at least one polymer block containing a aromatic vinyl compound unit and (a2) at least one polymer block containing a conjugated diene compound unit, (B) a polyvinyl acetal resin and (C) a compatibilizer, said thermoplastic polymer composition containing 5-100 parts by mass of the compatibilizer (C) per 100 parts by mass of the block copolymer (A).

First claim

1 . A fiber comprising a thermoplastic polymer composition that comprises:
a block copolymer (A) comprising at least one polymer block (a1) comprising a unit of an aromatic vinyl compound and at least one polymer block (a2) comprising a unit of a conjugated diene compound; a polyvinyl acetal resin (B); and a compatibilizing agent (C), an amount of the compatibilizing agent (C) being 5 to 100 parts by mass per 100 parts by mass of the block copolymer (A).

2 . The fiber according to claim 1 , wherein the conjugated diene compound comprises butadiene or isoprene.

3 . The fiber according to claim 1 , wherein a block chain of the polymer block (a2) comprises a 1,4-bond in an amount of 50% by mole or less.

4 . The fiber according to claim 1 , wherein the block copolymer (A) comprises:
a block copolymer (A1) wherein the polymer block (a2) comprises a polymer block (a2-1) in which a block chain comprises a 1,4-bond in an amount of 50% by mole or less; and a block copolymer (A2) wherein the polymer block (a2) comprises a polymer block (a2-2) in which a block chain comprises a 1,4-bond in an amount of 70% by mole or larger.

5 . The fiber according to claim 1 , wherein at least 70% of unsaturated double bonds in the block copolymer (A) are hydrogenated.

6 . The fiber according to claim 1 , which comprises the thermoplastic polymer composition that comprises the polyvinyl acetal resin (B) in an amount of 1 to 100 parts by mass per 100 parts by mass of the block copolymer (A).

7 . The fiber according to claim 1 , wherein the polyvinyl acetal resin (B) is polyvinyl butyral.

8 . The fiber according to claim 1 , wherein the compatibilizing agent (C) is a polar-group-containing polyolefin.

9 . The fiber according to claim 8 , wherein the polar-group-containing polyolefin is a carboxylic-acid-modified polypropylene-based resin.

10 . A fabric comprising a fiber according to claim 1 .

11 . The fabric according to claim 10 , which is a nonwoven fabric.

12 . The nonwoven fabric according to claim 11 , wherein an average fiber diameter of the fiber constituting the nonwoven fabric is 1 to 30 μm.

13 . The nonwoven fabric according to claim 12 , which has a fabric weight of 5 to 150 g/m 2 .

Assignees

• Kuraray Co

Inventors

• Nakata Hiromichi
• Minamide Asako
• TOMOI Masanori
• Shirotani Yasuhiro

Classifications

• D04H1/4282

  Addition polymers · CPC title

• C08L53/02

  of vinyl-aromatic monomers and conjugated dienes · CPC title

• D01F6/50 Primary

  of polyalcohols, polyacetals or polyketals · CPC title

• D01F6/28

  from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• D01F1/10

  Other agents for modifying properties · CPC title