Normal pressure dyeable polyester fiber and method for producing the same

Patent metadata

Field	Value
Publication number	US-2016138198-A1
Application number	US-201514757510-A
Country	US
Kind code	A1
Filing date	Dec 23, 2015
Priority date	Dec 4, 2009
Publication date	May 19, 2016
Grant date	—

Abstract

Disclosed is a fiber made of a polyester resin, wherein the polyester resin is a copolymer including a dicarboxylic acid component and a glycol component; of the dicarboxylic acid component, 80 mol % or more is accounted for by a terephthalic acid component, 4.0 to 12.0 mol % is accounted for by a cyclohexane dicarboxylic acid component, and 2.0 to 8.0 mol % is accounted for by an adipic acid component; and the glycol component contains an ethylene glycol component as a main component thereof. A polyester fiber is thereby provided which can be dyed with excellent deep color property and fastness property in dyeing under a normal pressure environment and which can offer stable quality and processing performance also by a direct spinning stretching method or other general melt-spinning methods.

First claim

1 - 6 . (canceled)

7 . A method for producing a fiber comprising a polyester resin, wherein the polyester resin is a copolymer comprising:
a dicarboxylic acid component comprising 80 mol % or more of a terephthalic acid component, 4.0 to 12.0 mol % of a cyclohexane dicarboxylic acid component, and 3.0 to 8.0 mol % of an adipic acid component; and a glycol component comprising, as a main component, an ethylene glycol component, wherein the polyester resin has a glass transition temperature (Tg) satisfying (a):
(a) glass transition temperature (Tg): 61° C.≦Tg≦72° C. said method comprising, in the following order:
(1) melt-spinning a polyester resin through a spinneret, to obtain a melt-spun thread; (2) cooling the melt-spun thread to a glass transition temperature of the melt-spun thread or lower, thereby obtaining a cooled thread; (3) running the cooled thread within a tube heating apparatus, thereby obtaining a heat-stretched thread, (4) contacting the heat-stretched thread with an oil, to obtain an oiled thread; and (5) winding the oiled thread at a rate of 3500 to 5500 m/minute.

8 . The method of claim 7 , wherein the polyester resin has a glass transition temperature (Tg) and a crystallization temperature (Tch) satisfying (b) and (c):
(b) crystallization temperature (Tch): 120° C.≦Tch≦150° C.; and (c) ΔT (Tch−Tg): 50° C.≦ΔT (Tch−Tg)≦80° C.

9 . The method of claim 7 , wherein said fiber satisfies (d) to (f):
(d) a degree of exhaustion at 95°C. is 70% or more and a degree of exhaustion at 100° C. is 90% or more; (e) a color fastness to washing in dyeing at 100° C. of discoloration, that of attachment staining, and that of liquid staining are respectively grade 4 or higher; and (f) a color fastness to light in dyeing at 100° C. is grade 4 or higher.

10 . The method of claim 7 , wherein said fiber has a retention of strength at break after a 15% alkali weight loss treatment of 90% or higher.

11 . The method of claim 7 , wherein the dicarboxylic acid component comprises from 5.0 to 10.0 mol % of the cyclohexanedicarboxylic acid component.

12 . The method of claim 11 , wherein the dicarboxylic acid component comprises from 3.0 to 6.0 mol % of the adipic acid component.

13 . The method of claim 7 , wherein the dicarboxylic acid component com rises from 3.0 to 6.0 mol % of the adipic acid component.

14 . The method of claim 7 , wherein the cyclohexanedicarboxylic acid component comprises at least one selected from the group consisting of 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, and 1,4-cyclohexanedicarboxylic acid.

15 . The method of claim 7 , wherein the dicarboxylic acid component further comprises up to 10 mol % of at least one aromatic dicarboxylic acid component selected from the group consisting of an isophthalic acid component and a naphthalene dicarboxylic acid component.

16 . The method of claim 15 , wherein the aromatic dicarboxylic acid component comprises 5 mol % or less of the isophthalic acid component.

17 . The method of claim 7 , wherein the dicarboxylic acid component further comprises up to 10 mol % of at least one aliphatic dicarboxylic acid component selected from the group consisting of an azelaic acid component and a sebacic acid component.

18 . The method of claim 7 , wherein the polyester resin has an intrinsic viscosity of 0.6 to 0.7.

19 . The method of claim 7 , wherein the polyester resin has an intrinsic viscosity of 0.62 to 0.68.

20 . The method of claim 7 , wherein the polyester resin has an intrinsic viscosity of 0.63 to 0.66.

21 . A method for dyeing a fiber, the method comprising:
dyeing the fiber, with a disperse dye under normal pressure at 95 to 100° C. wherein said fiber comprises a polyester resin wherein said polyester resin is a copolymer comprising: a dicarboxylic acid component comprising 80 mol % or more of a terephthalic acid component, 4.0 to 12.0 mol % of a cyclohexane dicarboxylic acid component, and 3.0 to 8.0 mol % of an adipic acid component; and a glycol component comprising, as a main component, an ethylene glycol component, wherein the polyester resin has a glass transition temperature (Tg) satisfying (a): (a) glass transition temperature (Tg): 61° C.≦Tg≦72″C.

22 . The method of claim 21 , wherein the polyester resin has a glass transition temperature (Tg) and a crystallization temperature (Tch) satisfying (b) and (c):
(b) crystallization temperature (Tch): 120° C.≦Tch≦150° C.; and (c) ΔT (Tch−Tg): 50° C.≦ΔT (Tch−Tg)≦80° C.

23 . The method of claim 21 , wherein said fiber satisfies (d) to (f):
(d) a degree of exhaustion at 95° C. is 70% or more and a degree of exhaustion at 100° C. is 90% or more; (e) a color fastness to washing in dyeing at 100° C. of discoloration, that of attachment staining, and that of liquid staining are respectively grade 4 or higher; and (f) a color fastness to light in dyeing at 100° C. is grade 4 or higher.

24 . The method of claim 21 , wherein said fiber has a retention of strength at break after a 15% alkali weight loss treatment of 90% or higher.

25 . The method of claim 21 , wherein the dicarboxylic acid component comprises from 5.0 to 10.0 mol % of the cyclohexanedicarboxylic acid component.

26 . The method of claim 25 , wherein the dicarboxylic acid component comprises from 3.0 to 6.0 mol % of the adipic acid component.

27 . The method of claim 21 , wherein the dicarboxylic acid component comprises from 3.0 to 6.0 mol % of the adipic acid component.

28 . The method of claim 21 , wherein the cyclohexanedicarboxylic acid component comprises at least one selected from the group consisting of 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, and 1,4-cyclohexanedicarboxylic acid.

29 . The method of claim 21 , wherein the dicarboxylic acid component further comprises up to 10 mol % of at least one aromatic dicarboxylic acid component selected from the group consisting of an isophthalic acid component and a naphthalene dicarboxylic acid component.

30 . The method of claim 29 , wherein the aromatic dicarboxylic acid component comprises 5 mol % or less of the isophthalic acid component.

31 . The method of claim 21 , wherein the dicarboxylic acid component further comprises up to 10 mol % of at least one aliphatic dicarboxylic acid component selected from the group consisting of an azelaic acid component and a sebacic acid component.

32 . The method of claim 21 , wherein the polyester resin has an intrinsic viscosity of 0.6 to 0.7.

33 . The method of claim 21 , wherein the polyester resin has an intrinsic viscosity of 0.62 to 0.68.

34 . The method of claim 21 , wherein the polyester resin has an intrinsic viscosity of 0.63 to 0.66.

Assignees

• Kuraray Co

Inventors

• Oka Kazuhide
• Nakada Hiroyuki
• Kawamoto Masao
• Tanaka Kazuhiko

Classifications

• D01D5/088

  Cooling filaments, threads or the like, leaving the spinnerettes · CPC title

• C08G63/183

  Terephthalic acids · CPC title

• D06P3/54

  using dispersed dyestuffs · CPC title

• D10B2331/04

  polyesters, e.g. polyethylene terephthalate [PET] · CPC title

• D01D5/12

  Stretch-spinning methods ({D01D5/098 takes precedence} finishing by stretching D02J1/22) · CPC title