Fiber made of alloy resin composition of polyester

Abstract

The present invention concerns a method of preparing a hybrid fiber including polyamide and polyester. Particularly, the method of preparing a hybrid fiber comprises, forming a blend by melting a) 4.99 to 95% by weight of a thermoplastic polyamide resin, b) 4.99 to 95% by weight of a thermoplastic polyester resin, and c) 0.01 to 10% by weight of an epoxy resin at 250 to 300° C., and blend spinning and elongating 10 to 90% by weight of the blend with 90 to 10% by weight of a polyester resin. The hybrid fiber shows highly improved compatibility of the polyamide resin and the thermoplastic polyester resin, and shows excellent strength and elongation.

1 . A method of preparing a fiber, comprising:
 forming a first blend by melting: a) a thermoplastic polyamide resin, b) a first thermoplastic polyester resin, and c) an epoxy resin, at 250 to 300° C.; and   blend-spinning and elongating a second blend comprising 5 to 95% by weight of the first blend and 95 to 5% by weight of a second polyester resin to prepare the fiber.   
     
     
         2 . The method according to  claim 1 , wherein the second blend comprises 25 to 75% by weight of the blend and 75 to 25% by weight of the second polyester resin. 
     
     
         3 . The method according to  claim 1 , wherein the polyamide resin comprises at least one member selected from the group consisting of polyamide-6, polyamide-66, polyamide-610, polyamide-11, polyamide-12, terephthalic acid-based polyamide, isophthalic acid-based polyaramid, and copolymers thereof. 
     
     
         4 . The method according to  claim 1 , wherein the second polyester resin comprises at least one member selected from the group consisting of polybutylene terephthalate, polybutylene (terephthalate/isophthalate), polybutylene (terephthalate/adipate), polybutylene (terephthalate/sebacate), poly-butylene (terephthalate/decanedicarboxylate), polybutylene naphthalate, polyethylene terephthalate, polyethylene (terephthalate/isophthalate), polyethylene (terephthalate/adipate), polyethylene (terephthalate/5-sodium sulfoisophthalate), polybutylene (terephthalate/5-sodium sulfoisophthalate), polypropylene terephthalate, polyethylene naphthalate, and polycyclohexane dimethylene terephthalate. 
     
     
         5 . The method according to  claim 1 , wherein the epoxy resin comprises at least one member selected from the group consisting of a diglycidyl ether of bisphenol A type epoxy resin, a diglycidyl ether of bisphenol F type epoxy resin, a hydrogenated bisphenol A type epoxy resin, a brominated epoxy resin, a cycloaliphatic epoxy resin, a rubber-modified epoxy resin, an aliphatic polyglycidyl-type epoxy resin, and a glycidyl amine-type epoxy resin. 
     
     
         6 . A fiber prepared by the method according to  claim 1 . 
     
     
         7 . The method according to  claim 1 , wherein the first thermoplastic polyester resin comprises at least one member selected from the group consisting of polybutylene terephthalate, polybutylene (terephthalate/isophthalate), polybutylene (terephthalate/adipate), polybutylene (terephthalate/sebacate), poly-butylene (terephthalate/decanedicarboxylate), polybutylene naphthalate, polyethylene terephthalate, polyethylene (terephthalate/isophthalate), polyethylene (terephthalate/adipate), polyethylene (terephthalate/5-sodium sulfoisophthalate), polybutylene (terephthalate/5-sodium sulfoisophthalate), polypropylene terephthalate, polyethylene naphthalate, and polycyclohexane dimethylene terephthalate. 
     
     
         8 . The fiber of  claim 6 , wherein the fiber comprises 4.99 to 95% by weight of the polyamide resin, 4.99 to 95% by weight of the polyester resins, and 0.01 to 10% by weight of the epoxy resin. 
     
     
         9 . The method of  claim 9 , wherein the second blend comprises 4.99 to 95% by weight of the polyamide resin, 4.99 to 95% by weight of the polyester resin, and 0.01 to 10% by weight of the epoxy resin. 
     
     
         10 . The method according to  claim 1 , wherein first thermoplastic polyester resin and the second polyester resin each comprise at least one member selected from the group consisting of polybutylene terephthalate, polybutylene (terephthalate/isophthalate), polybutylene (terephthalate/adipate), polybutylene (terephthalate/sebacate), poly-butylene (terephthalate/decanedicarboxylate), polybutylene naphthalate, polyethylene terephthalate, polyethylene (terephthalate/isophthalate), polyethylene (terephthalate/adipate), polyethylene (terephthalate/5-sodium sulfoisophthalate), polybutylene (terephthalate/5-sodium sulfoisophthalate), polypropylene terephthalate, polyethylene naphthalate, and polycyclohexane dimethylene terephthalate. 
     
     
         11 . The method of  claim 10 , wherein the thermoplastic polyamide resin comprises polyamide-6, the first thermoplastic polyester resin and the second polyester resin each comprise polyethylene terephthalate, and the epoxy resin comprises a diglycidyl ether of bisphenol A-type epoxy resin. 
     
     
         12 . A method of making a fiber, comprising blend-spinning and elongating a resin blend comprising:
 95 to 5% by weight of a thermoplastic polyester resin comprising at least one member selected from the group consisting of polybutylene terephthalate, polybutylene (terephthalate/isophthalate), polybutylene (terephthalate/adipate), polybutylene (terephthalate/sebacate), poly-butylene (terephthalate/decanedicarboxylate), polybutylene naphthalate, polyethylene terephthalate, polyethylene (terephthalate/isophthalate), polyethylene (terephthalate/adipate), polyethylene (terephthalate/5-sodium sulfoisophthalate), polybutylene (terephthalate/5-sodium sulfoisophthalate), polypropylene terephthalate, polyethylene naphthalate, and polycyclohexane dimethylene terephthalate, and   5 to 95% by weight of a first resin blend formed by melt phase blending of:
 a) 4.99 to 95% by weight of a thermoplastic polyamide resin comprising at least one member selected from the group consisting of polyamide-6, polyamide-66, polyamide-610, polyamide-11, polyamide-12, terephthalic acid-based polyamide, isophthalic acid-based polyaramid, and copolymers thereof, 
 b) 4.99 to 95% by weight of the thermoplastic polyester resin, and 
 c) 0.01 to 10% by weight of an epoxy resin comprising at least one member selected from the group consisting of a diglycidyl ether of bisphenol A-type epoxy resin, a diglycidyl ether of bisphenol F-type epoxy resin, a hydrogenated bisphenol A-type epoxy resin, a brominated epoxy resin, a cycloaliphatic epoxy resin, a rubber-modified epoxy resin, an aliphatic polyglycidyl-type epoxy resin, and a glycidyl amine-type epoxy resin. 
   
     
     
         13 . The method of  claim 12 , wherein the thermoplastic polyamide resin comprises polyamide-6, the thermoplastic polyester resin comprises polyethylene terephthalate, and the epoxy resin comprises a diglycidyl ether of bisphenol A-type epoxy resin. 
     
     
         14 . A fiber made by the method of  claim 12 .