Composite yarn

Abstract

Provided is a composite yarn. The composite yarn includes a core and a sheath. The core is made of a thermoplastic material; wherein the thermoplastic material is selected from a group consisting of: a polyester, a polyamide, a polyacrylonitrile and any combination thereof. The sheath formed around the core is made of a cladding material, and the cladding material comprises polyvinyl butyral; wherein the polyvinyl butyral has a melt flow rate ranging from 2 g/10 min to 35 g/10 min; the melt flow rate is measured by a standard method ASTM D1238 at 190° C. with 2.16 kg load.

What is claimed is: 
     
         1 . A composite yarn, comprising:
 a core which is made of a thermoplastic material; wherein the thermoplastic material is selected from a group consisting of: a polyester, a polyamide, a polyacrylonitrile and any combination thereof; and   a sheath which is formed around the core; wherein the sheath is made of a cladding material, and the cladding material comprises polyvinyl butyral; wherein the polyvinyl butyral has a melt flow rate ranging from 2 grams per 10 minutes to 35 grams per 10 minutes; the melt flow rate is measured by a standard method ASTM D1238 at 190° C. with 2.16 kilograms load.   
     
     
         2 . The composite yarn as claimed in  claim 1 , wherein the sheath has a thickness ranging from 0.08 millimeters to 5.0 millimeters. 
     
     
         3 . The composite yarn as claimed in  claim 1 , wherein the sheath has a thickness ranging from 0.08 millimeters to 0.9 millimeters. 
     
     
         4 . The composite yarn as claimed in  claim 1 , wherein the cladding material further comprises a thermoplastic polyurethane. 
     
     
         5 . The composite yarn as claimed in  claim 4 , wherein the thermoplastic polyurethane is in an amount from larger than 0 part by weight to 100 parts by weight relative to 100 parts by weight of the polyvinyl butyral. 
     
     
         6 . The composite yarn as claimed in  claim 1 , wherein the cladding material further comprises a plasticizer. 
     
     
         7 . The composite yarn as claimed in  claim 6 , wherein the plasticizer is in an amount from 20 parts by weight to 100 parts by weight relative to 100 parts by weight of the polyvinyl butyral. 
     
     
         8 . The composite yarn as claimed in  claim 4 , wherein the cladding material further comprises a plasticizer. 
     
     
         9 . The composite yarn as claimed in  claim 8 , wherein the plasticizer is in an amount from 20 parts by weight to 100 parts by weight relative to 100 parts by weight of the polyvinyl butyral. 
     
     
         10 . The composite yarn as claimed in  claim 1 , wherein the polyvinyl butyral has the melt flow rate ranging from 7 grams per 10 minutes to 15 grams per 10 minutes; the melt flow rate is measured by the standard method ASTM D1238 at 190° C. with 2.16 kilograms load. 
     
     
         11 . The composite yarn as claimed in  claim 6 , wherein the polyvinyl butyral has the melt flow rate ranging from 7 grams per 10 minutes to 15 grams per 10 minutes; the melt flow rate is measured by the standard method ASTM D1238 at 190° C. with 2.16 kilograms load. 
     
     
         12 . The composite yarn as claimed in  claim 7 , wherein the polyvinyl butyral has the melt flow rate ranging from 7 grams per 10 minutes to 15 grams per 10 minutes; the melt flow rate is measured by the standard method ASTM D1238 at 190° C. with 2.16 kilograms load.