Stretch Break Method and Product

Abstract

A method for stretch breaking fibers to produce a staple yarn and operating a staple fiber spinning machine that enables the production of a plurality of products of lot size smaller than a large denier tow product. The process includes at least two break zones and a consolidation zone downstream from a second break zone to form a staple yarn. The filaments are broken in a second break zone downstream from the first break zone by increasing the speed of the fiber fed into the process. The yarn includes discontinuous and, optionally, continuous filaments.

1 . A consolidated yarn (a) discontinuous filaments of different lengths that have not been drawn and are intermingled along a length of the yarn to maintain a unity of the yarn, and (b) continuous filaments intermingled with the discontinuous filaments along the length of the yarn; 
 wherein the discontinuous filaments comprise materials selected from the group consisting of nylon, polyester, a fluoropolymer, an acetate polymer or copolymer, an acrylic polymer or copolymer, polyacetal, an acrylate polymer or copolymer, polyacrylonitrile, a cellulose polymer, an olefin polymer or copolymer, polyimide, a styrenic polymer or copolymer, an ether/ester copolymer, a copolymer of an amide with an ether and/or ester, a vinyl polymer, and a polyimide; and mixtures of any two or more thereof;    wherein the continuous filaments comprise different materials selected from the group consisting of nylon, polyester, a fluoropolymer, an acetate polymer or copolymer, an acrylic polymer or copolymer, polyacetal, an acrylate polymer or copolymer, polyacrylonitrile, a cellulose polymer, an olefin polymer or copolymer, polyimide, a styrenic polymer or copolymer, an ether/ester copolymer, a copolymer of an amide with an ether and/or ester, a vinyl polymer, a polyimide, a polyurethane, a copolymer having blocks of polyurethane and blocks of polymerized ethers and/or esters, a natural fiber, a metallic fiber or wire, a glass fiber or a ceramic fiber; and mixtures of any two or more thereof; and    wherein the continuous filaments have less than 10% elongation to break.    
   
   
       2 . A yarn according to  claim 1  wherein the discontinuous filaments comprise materials selected from the group consisting of nylon, polyester, a fluoropolymer, a cellulose polymer, an olefin polymer or copolymer, an ether/ester copolymer, a vinyl polymer, and mixtures of any two or more thereof  
   
   
       3 . A yarn according to  claim 1  wherein the wherein the continuous filaments comprise different materials selected from the group consisting of nylon, polyester, a fluoropolymer, an acrylic polymer or copolymer, a cellulose polymer, an olefin polymer or copolymer, a styrenic polymer or copolymer, an ether/ester copolymer, a vinyl polymer, a polyimide, a polyurethane, a copolymer having blocks of polyurethane and blocks of polymerized ethers and/or esters, a natural fiber, a metallic fiber or wire, a glass fiber or a ceramic fiber; and mixtures of any two or more thereof.  
   
   
       4 . A yarn according to  claim 1  wherein the discontinuous filaments comprise materials selected from the group consisting of nylon, polyester, a fluoropolymer, a cellulose polymer, an olefin polymer or copolymer, and mixtures of any two or more thereof; and wherein the continuous filaments comprise different materials selected from the group consisting of nylon, polyester, a fluoropolymer, a cellulose polymer, an olefin polymer or copolymer, a polyurethane, a copolymer having blocks of polyurethane and blocks of polymerized ethers and/or esters, a metallic fiber or wire, a glass fiber or a ceramic fiber; and mixtures of any two or more thereof.  
   
   
       5 . A consolidated yarn comprising (a) discontinuous filaments of different lengths that have been drawn and are intermingled along a length of the yarn to maintain a unity of the yarn, and (b) continuous filaments intermingled with the discontinuous filaments along the length of the yarn; 
 wherein the discontinuous filaments comprise materials selected from the group consisting of nylon, polyester, an olefin polymer or copolymer, an ether/ester copolymer, an acrylic polymer or copolymer, polyacetal, poly(vinyl chloride), and mixtures of any two or more thereof; and    wherein the continuous filaments comprise different materials selected from the group consisting of nylon, polyester, an aramid, a fluoropolymer, an acetate polymer or copolymer, an acrylic polymer or copolymer, polyacetal, an acrylate polymer or copolymer, polyacrylonitrile, a cellulose polymer, an olefin polymer or copolymer, polyimide, a styrenic polymer or copolymer, an ether/ester copolymer, a copolymer of an amide with an ether and/or ester, a vinyl polymer, a polyimide, a polyurethane, a copolymer having blocks of polyurethane and blocks of polymerized ethers and/or esters, a natural fiber, a metallic fiber or wire, a glass fiber or a ceramic fiber; and mixtures of any two or more thereof.    
   
   
       6 . A yarn according to  claim 5  wherein the discontinuous filaments comprise materials selected from the group consisting of nylon, polyester, an olefin polymer or copolymer, an ether/ester copolymer, and mixtures of any two or more thereof  
   
   
       7 . A yarn according to  claim 5  wherein the wherein the continuous filaments comprise different materials selected from the group consisting of nylon, polyester, an aramid, a fluoropolymer, an acrylic polymer or copolymer, a cellulose polymer, an olefin polymer or copolymer, a styrenic polymer or copolymer, an ether/ester copolymer, a vinyl polymer, a polyimide, a polyurethane, a copolymer having blocks of polyurethane and blocks of polymerized ethers and/or esters, a natural fiber, a metallic fiber or wire, a glass fiber or a ceramic fiber; and mixtures of any two or more thereof.  
   
   
       8 . A yarn according to  claim 5  wherein the discontinuous filaments comprise materials selected from the group consisting of nylon, polyester, an olefin polymer or copolymer, and mixtures of any two or more thereof; and wherein the continuous filaments comprise different materials selected from the group consisting of nylon, polyester, an aramid, a fluoropolymer, a cellulose polymer, an olefin polymer or copolymer, a polyurethane, a copolymer having blocks of polyurethane and blocks of polymerized ethers and/or esters, a metallic fiber or wire, a glass fiber or a ceramic fiber; and mixtures of any two or more thereof.  
   
   
       9 . A consolidated yarn comprising (a) discontinuous filaments of different lengths that have been drawn and are intermingled along a length of the yarn to maintain a unity of the yarn, and (b) discontinuous filaments of different lengths that have not been drawn and are intermingled along a length of the yarn to maintain a unity of the yarn; 
 wherein the discontinuous drawn filaments comprise materials selected from the group consisting of nylon, polyester, an olefin polymer or copolymer, an ether/ester copolymer, an acrylic polymer or copolymer, polyacetal, poly(vinyl chloride), and mixtures of any two or more thereof; and    wherein the discontinuous filaments that are not drawn comprise different materials selected from the group consisting of nylon, polyester, an aramid, a fluoropolymer, an acetate polymer or copolymer, an acrylic polymer or copolymer, polyacetal, an acrylate polymer or copolymer, polyacrylonitrile, a cellulose polymer, an olefin polymer or copolymer, polyimide, a styrenic polymer or copolymer, an ether/ester copolymer, a copolymer of an amide with an ether and/or ester, a vinyl polymer, and a polyimide; and mixtures of any two or more thereof.    
   
   
       10 . A yarn according to  claim 9  wherein the drawn discontinuous filaments comprise materials selected from the group consisting of nylon, polyester, an olefin polymer or copolymer, an ether/ester copolymer, a vinyl polymer, and mixtures of any two or more thereof  
   
   
       11 . A yarn according to  claim 9  wherein the discontinuous filaments that have not been drawn comprise materials selected from the group consisting of nylon, polyester, an aramid, a fluoropolymer, a cellulose polymer, an olefin polymer or copolymer, an ether/ester copolymer, a vinyl polymer, and mixtures of any two or more thereof.  
   
   
       12 . A yarn according to  claim 9  wherein the drawn discontinuous filaments comprise materials selected from the group consisting of nylon, polyester, an olefin polymer or copolymer, and mixtures of any two or more thereof; and wherein the discontinuous filaments that have not been drawn comprise materials selected from the group consisting of nylon, polyester, an aramid, a fluoropolymer, a cellulose polymer, an olefin polymer or copolymer, an ether/ester copolymer, and mixtures of any two or more thereof.  
   
   
       13 . A yarn according to  claim 9  further comprising continuous filaments intermingled with the discontinuous filaments along the length of the yarn; wherein the continuous filaments comprise different materials selected from the group consisting of nylon, polyester, an aramid, a fluoropolymer, an acetate polymer or copolymer, an acrylic polymer or copolymer, polyacetal, an acrylate polymer or copolymer, polyacrylonitrile, a cellulose polymer, an olefin polymer or copolymer, polyimide, a styrenic polymer or copolymer, an ether/ester copolymer, a copolymer of an amide with an ether and/or ester, a vinyl polymer, a polyimide a polyurethane, a copolymer having blocks of polyurethane and blocks of polymerized ethers and/or esters, a natural fiber, a metallic fiber or wire, a glass fiber or a ceramic fiber; and mixtures of any two or more thereof.  
   
   
       14 . A yarn according to  claim 9  wherein the continuous filaments comprise different materials selected from the group consisting of nylon, polyester, an aramid, a fluoropolymer, a cellulose polymer, an olefin polymer or copolymer, a polyurethane, a copolymer having blocks of polyurethane and blocks of polymerized ethers and/or esters, a metallic fiber or wire, a glass fiber or a ceramic fiber; and mixtures of any two or more thereof.  
   
   
       15 . A yarn according to  claim 5  or  9  wherein the average length, avg, of the discontinuous filaments is greater than 6 inches, and the filaments have a filament length distribution such that 5% to less than 15% of the filaments have a length that is greater than 1.5 avg.  
   
   
       16 . A yarn according to  claim 5  or  9  wherein the average length, avg, of the discontinuous filaments is greater than 6 inches, and the filaments have a filament length distribution such that 5% to less than 15% of the filaments have a length less than 0.5 avg, and 5% to less than 15% of the filaments have a length that is greater than 1.5 avg.  
   
   
       17 . A yarn according to  claim 5  or  9  wherein at least 1% of the discontinuous filaments in the yarn by denier have a filament-to-filament coefficient of friction of 0.1 or less.  
   
   
       18 . A yarn according to  claim 5  or  9  wherein at least 1% of the discontinuous filaments in the yarn have a filament cross-section having a width and a plurality of thick portions connected by thin portions within the filament width, and the thin portions at the ends of the discontinuous filaments are severed so the thick portions are separated for a length of at least about three filament widths to thereby form split ends on the filaments.  
   
   
       19 . A yarn according to  claim 5  or  9  wherein at least 1% of the discontinuous filaments in the yarn by denier have a latent elasticity of 30% or more.  
   
   
       20 . A yarn according to  claim 5  or  9  wherein at least 1% of the discontinuous filaments in the yarn by denier form a bicomponent yarn comprising a first component of 2GT polyester and a second component of 3GT polyester.  
   
   
       21 . A yarn according to  claim 5  or  9  wherein at least 1% of the yarn by denier comprises a fluoropolymer.  
   
   
       22 . A yarn according to  claim 5  or  9  which comprises filaments that have a difference in colors to form a multicolored yarn; wherein the colors of the filaments, excluding neutral colors, have a lightness greater than 90%, and the colors of the filaments have a color difference of at least 2.0 CIELAB units; and wherein the lightness and color difference is measured according to ASTM Committee E12, Standard E-284.  
   
   
       23 . A yarn according to  claim 5  or  9  wherein the continuous filaments have less than 10% elongation to break.  
   
   
       24 . A yarn according to  claim 5  or  9  wherein the continuous filaments comprise elastic polymeric filaments having an elongation to break greater than about 100% and an elastic recovery of at least 30% from an extension of 50%.