US2012003472A1PendingUtilityA1

Flame-resistant yarn

41
Individually held — no corporate assignee on recordPriority: Jun 30, 2010Filed: Jun 30, 2011Published: Jan 5, 2012
Est. expiryJun 30, 2030(~3.9 yrs left)· nominal 20-yr term from priority
Inventors:William C. StuckeyYanda JinFrederick R. Ridewood
D02G 3/443D10B 2201/24D10B 2321/101D10B 2331/021Y10T428/2931
41
PatentIndex Score
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Cited by
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References
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Claims

Abstract

A yarn having flame-resistant properties comprises a blend of: (a) between 20% and 50% by mass of p-aramid fibres; (b) between 0% and 40% by mass of fire-resistant rayon fibres; and (c) between 0% and 60% by mass of modacrylic fibres, the yarn having a coating of resin polymer and organic pigment.

Claims

exact text as granted — not AI-modified
1 . A yarn having flame-resistant properties comprising a blend of:
 (a) between 20% and 50% by mass of p-aramid fibres   (b) between 0% and 40% by mass of fire-resistant rayon fibres   (c) between 0% and 60% by mass of modacrylic fibres   having a coating of resin polymer and organic pigment.   
     
     
         2 . A yarn a blend of:
 (a) between 20% and 50% by mass of p-aramid fibres   (b) between 20% and 40% by mass of fire-resistant rayon fibres   (c) between 20% and 60% by mass of modacrylic fibres   having a coating of resin polymer and organic pigment.   
     
     
         3 . A yarn according to  claim 2  having a blend of:
 (a) 30% by mass of p-aramid fibres 
 (b) 30% by mass of fire-resistant rayon fibres 
 (c) 40% by mass of modacrylic fibres. 
 
     
     
         4 . A yarn according to  claim 2  having a blend of:
 (a) 50% by mass of p-aramid fibres 
 (b) 20% by mass of fire-resistant rayon fibres 
 (c) 40% by mass of modacrylic fibres. 
 
     
     
         5 . A yarn according to  claim 1  having a blend of:
 (a) 50% by mass of p-aramid fibres 
 (b) 50% by mass of fire-resistant rayon fibres. 
 
     
     
         6 . A yarn according to  claim 1  having a blend of:
 (a) 50% by mass of p-aramid fibres 
 (b) 50% by mass of modacrylic fibres 
 
     
     
         7 . A yarn according to  claim 1  wherein the polymer is one of a nylon terpolymer and urethane polymer. 
     
     
         8 . A yarn according to  claim 1  wherein the pigment is derived from aqueous organic pigment. 
     
     
         9 . A yarn according to  claim 1  wherein the coating comprises between 3% to 9% of the mass of the yarn, per unit length. 
     
     
         10 . A method of manufacturing a flame-resistant yarn comprising the steps of:
 spinning a blend of:   (a) between 20% and 50% by mass of p-aramid fibres   (b) between 0% and 50% by mass of fire-resistant rayon fibres   (c) between 0% and 60% by mass of modacrylic fibres   to produce greige yarn;   passing the greige yarn through a solution of polymer resin in an solvent mix which additionally contains pigment; and   evaporating the solvent mix.   
     
     
         11 . A method according to  claim 10  wherein the step of spinning to produce greige yarn comprises vortex spinning. 
     
     
         12 . A method according to  claim 11  wherein the step of spinning to produce greige yarn comprises one of ring spinning and jet spinning. 
     
     
         13 . A method according to  claim 10  wherein the evaporation step includes passing the thread through at least one oven. 
     
     
         14 . A method according to  claim 13  wherein the evaporation step comprises passing the thread through a plurality of ovens having sequentially higher temperatures. 
     
     
         15 . A method according to  claim 10  additionally comprising the step of applying lubricant to the thread subsequent to evaporation of the solvent. 
     
     
         16 . A method according to  claim 10  wherein the resin comprises between 4% and 12% by mass of the resin-solvent or aqueous-pigment mix. 
     
     
         17 . A method according to  claim 10  wherein the pigment is derived from aqueous organic pigment. 
     
     
         18 . A method of dyeing a yarn comprising the steps of applying a colourant organic resin dissolved in a first solvent which includes water, evaporating the solvent, applying a bonding resin in a second solvent which includes an isopropylalcohol and water and evaporating the second solvent 
     
     
         19 . A method according to  claim 18  wherein the yarn has flame-resistant properties. 
     
     
         20 . A method according to  claim 19  wherein the yarn includes a blend of:
 (a) between 20% and 50% by mass of p-aramid fibres 
 (b) between 0% and 40% by mass of fire-resistant rayon fibres 
 (c) between 0% and 60% by mass of modacrylic fibres

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