US2022411970A1PendingUtilityA1

Bicomponent thermoplastic polyurethane fibers and fabrics made therefrom

39
Assignee: LUBRIZOL ADVANCED MAT INCPriority: Jul 3, 2019Filed: Jul 1, 2020Published: Dec 29, 2022
Est. expiryJul 3, 2039(~12.9 yrs left)· nominal 20-yr term from priority
Inventors:Lalith B. Suragani VenuJoseph J. Vontorcik, Jr.
D03D 15/292D04B 1/18D04H 1/43828D04H 1/4358D03D 15/56D01F 8/16D10B 2331/10D04H 3/009D01F 6/70D01D 5/34D03D 15/283
39
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

The present invention relates to a bicomponent fiber, wherein the fiber has a core and sheath structure. The bicomponent fiber is made from two different polyester thermo-plastic polyurethanes to provide a fiber with enhanced clarity and low shrinkage.

Claims

exact text as granted — not AI-modified
1 . A fabric comprising:
 a bicomponent fiber, wherein the bicomponent fiber has a core and sheath structure, wherein the core comprises a thermoplastic polyurethane composition having a melting enthalpy of at least about 50 J/g measured according to ASTM D3418 and a contact clarity of 4% or less as measured according to ASTM D1003 and the sheath comprises a thermoplastic polyurethane composition having a melting enthalpy of about 5 J/g or less measured according to ASTM D3418 and a contact clarity of at least 12% measured according to ASTM D1003.   
     
     
         2 . The fabric of  claim 1 , wherein the core thermoplastic polyurethane composition has a shrinkage of less than 10% after 90 seconds exposure at 70° C. 
     
     
         3 . The fabric of  claim 1 , wherein the sheath thermoplastic polyurethane composition has a shrinkage of 40% to 60% after 90 seconds exposure at 70° C. 
     
     
         4 . The fabric of  claim 1 , wherein the bicomponent fiber comprises a core to sheath ratio of 10:90 to 35:65. 
     
     
         5 . The fabric of  claim 1 , wherein the bicomponent fiber has a shrinkage after 90 seconds of exposure at 70° C. of less than 20% and a contact clarity measured according to ASTM D1003 of greater than 13%. 
     
     
         6 . The fabric of  claim 1 , wherein the bicomponent fiber has a melting range of 100° C. to 120° C. measured by DSC. 
     
     
         7 . The fabric of  claim 1 , wherein the core comprises a polyester thermoplastic polyurethane. 
     
     
         8 . The fabric of  claim 1 , wherein the sheath comprises a polyester thermoplastic polyurethane that is different from the core thermoplastic polyurethane. 
     
     
         9 . The fabric of  claim 1 , wherein the core comprises a thermoplastic polyurethane comprising the reaction product of butanediol succinate and an aromatic diisocyanate. 
     
     
         10 . The fabric of  claim 9 , wherein the core comprises a thermoplastic polyurethane consisting of the reaction product of butanediol succinate and aromatic diisocyanate. 
     
     
         11 . The fabric of  claim 1 , wherein the sheath comprises a thermoplastic polyurethane comprising the reaction product of butanediol adipate, an aromatic diisocyanate, and a chain extender. 
     
     
         12 . The fabric of  claim 11 , wherein the sheath comprises a thermoplastic polyurethane consisting of the reaction product of butanediol adipate, an aromatic diisocyanate, and a chain extender. 
     
     
         13 . The fabric of  claim 1 , wherein both the core thermoplastic polyurethane and the sheath thermoplastic polyurethane are free of crosslinking. 
     
     
         14 . The fabric of  claim 1 , wherein the core comprises a thermoplastic polyurethane having a melting enthalpy of about 60 J/g. 
     
     
         15 . The fabric of  claim 1 , wherein the sheath comprises a thermoplastic polyurethane having a melting enthalpy of 5 J/g. 
     
     
         16 . A bicomponent fiber having a core and sheath structure, wherein the bicomponent fiber comprises:
 (a) a core comprising a first polyester thermoplastic polyurethane; wherein the first polyester thermoplastic polyurethane has a melting enthalpy of at least 50J/g measured according to ASTM D3418. (b) a sheath comprising a second polyester thermoplastic polyurethane, wherein the second polyester thermoplastic polyurethane has a melting enthalpy of 5 J/g or less measured according to ASTM D3418.   
     
     
         17 . The bicomponent fiber of  claim 16 , wherein the first polyester thermoplastic polyurethane has a contact clarity of 4% or less as measured according to ASTM D1003. 
     
     
         18 . The bicomponent fiber of  claim 16 , wherein the second polyester thermoplastic polyurethane has a contact clarity of at least 12% measured according to ASTM D1003. 
     
     
         19 . The bicomponent fiber of  claim 16 , wherein the first polyester thermoplastic polyurethane comprises the reaction product of butanediol succinate and an aromatic diisocyanate. 
     
     
         20 . The bicomponent fiber of  claim 16 , wherein the second polyester thermoplastic polyurethane comprises the reaction product of butanediol adipate, an aromatic diisocyanate, and a chain extender. 
     
     
         21 . The bicomponent fiber of  claims 16 , wherein the bicomponent fiber comprises 65% to 90% by weight of the second thermoplastic polyurethane. 
     
     
         22 . The bicomponent fiber of  claim 16 , wherein the bicomponent fiber comprises 10% to 35% by weight of the core thermoplastic polyurethane composition. 
     
     
         23 . The bicomponent fiber of  claim 16 , wherein the first thermoplastic polyurethane has a shrinkage of less than 10% after 90 seconds exposure at 70° C. . 
     
     
         24 . The bicomponent fiber of  claim 16 , wherein the second thermoplastic polyurethane has a shrinkage of 40% to 60% after 90 seconds exposure at 70° C. 
     
     
         25 . The bicomponent fiber of  claim 16 , wherein the first polyester thermoplastic polyurethane has a melting enthalpy of 60 J/g measured according to ASTM D3418. 
     
     
         26 . The bicomponent fiber of  claim 16 , wherein the second polyester thermoplastic polyurethane has a melting enthalpy of 5 J/g measured according to ASTM D3418. 
     
     
         27 . The bicomponent fiber of  claim 16 , wherein both the first and second thermoplastic polyurethanes are free of crosslinking. 
     
     
         28 . A fabric comprising:
 a bicomponent fiber, wherein the bicomponent fiber has a core and sheath structure, wherein the core comprises a polyester thermoplastic polyurethane comprising the reaction product of butanediol succinate and an aromatic diisocyanate and has a melting enthalpy of at least 50J/g measured according to ASTM D3418 and a contact clarity of 4% or less as measured according to ASTM D1003 and the sheath comprises a polyester thermoplastic polyurethane comprising the reaction product of butanediol adipate, an aromatic diisocyanate, and a chain extender and has a melting enthalpy of 5 J/g or less measured according to ASTM D3418 and a contact clarity of at least 12% measured according to ASTM D1003, wherein both the core thermoplastic polyurethane and the sheath thermoplastic polyurethane are free of crosslinking.   
     
     
         29 . The fabric of  claim 28 , wherein the fabric is a knitted fabric. 
     
     
         30 . The fabric of  claim 28 , wherein the fabric is a woven fabric. 
     
     
         31 . The fabric of  claim 28 , wherein the fabric is a non-woven fabric.

Join the waitlist — get patent alerts

Track US2022411970A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.