Filamentary core, elastic composite yarn comprising the filamentary core, fabric comprising the filamentary core or the elastic composite yarn and method for manufacturing the filamentary core or the elastic composite yarn

Abstract

A filamentary core for a composite yarn for a woven fabric; may include at least one elastic filament including rubber. The rubber may be a natural rubber. The composite yarn may also include at least one control filament including a synthetic polymer.

1 . A filamentary core for a composite yarn for a woven fabric, the filamentary core comprising:
 at least one elastic filament comprising rubber; and   at least one control filament a synthetic polymer.   
     
     
         2 . The filamentary core according to  claim 1 , wherein the synthetic polymer is selected from the group consisting of: a polyester, a polyethylene, a polypropylene, polystyrene, a polyamid, a polyaramid, a polyoxymethylene, a polytetrafluorethylene, a polyetheretherketone, a polyphenylenesulfid, a polybuthyleneterephthalate, a polyalkyleneterepthalate and a copolymer of two or more thereof or a mixture of two or more thereof. 
     
     
         3 . The filamentary core of  claim 2 , wherein the polyester is an aliphatic polyester. 
     
     
         4 . The filamentary core according to  claim 1 , wherein the at least one elastic filament comprises at least 80 wt. % of cis-1,4-polyisoprene with respect to the total weight of the elastic filament. 
     
     
         5 . The filamentary core according to  claim 1 , wherein the at least one elastic filament comprises one or more selected from the group consisting of: a vulcanization agent; a vulcanization accelerator; a vulcanization activator; an anti-tacking agent; an antioxidant agent; and a stabilization agent. 
     
     
         6 . The filamentary core according to  claim 1 , wherein the at least one control filament further comprises a biodegradability enhancing additive. 
     
     
         7 . A filamentary core for a composite yarn for a woven fabric, comprising:
 at least one elastic filament; and   at least one biodegradable control filament comprising a synthetic polymer.   
     
     
         8 . The filamentary core of  claim 7 , wherein:
 the at least one biodegradable control filament comprises a biodegradability enhancing additive; and/or   the synthetic polymer is an aliphatic polyester.   
     
     
         9 . The filamentary core according to  claim 8 , wherein the biodegradability enhancing additive comprises one or more selected from the group consisting of: starch; a bioaugmentation additive; a pro-oxidant; and a composition comprising 2-hydroxy-3-(trimethylammonio)propyl ether. 
     
     
         10 . The filamentary core according to  claim 8 , wherein the biodegradability enhancing additive comprises starch, preferably is a composition comprising starch and 2-hydroxy-3-(trimethylammonio)propyl ether. 
     
     
         11 . The filamentary core according to  claim 1 , wherein the at least one elastic filament and/or the at least one control filament is biodegradable. 
     
     
         12 . The filamentary core according to  claim 1 , wherein the at least one elastic filament has:
 a linear mass density of less than 200 dtex; and/or,   a linear mass density of at least 30 dtex.   
     
     
         13 . The filamentary core according to  claim 1 , wherein the at least one control filament has:
 a linear mass density of at least 20 dtex; and/or   a maximum linear mass density of 500 dtex.   
     
     
         14 . The filamentary core according to  claim 1 , wherein the at least one elastic filament is stretchable at least 2 times its package length and has at least 90% elastic recovery after having being released from a stretching 2 times its package length. 
     
     
         15 . The filamentary core  claim 1 , wherein the at least one control filament is less elastic than the at least one elastic filament. 
     
     
         16 . The filamentary core according to  claim 1 , wherein:
 the filamentary core is a ring-spun filamentary core with the at least one control filament and the at least one elastic filament are being spun into the filamentary core by ring spinning; or   the filamentary core is a hollow-spindle-spun filamentary core with the at least one control filament and the at least one elastic filament being spun into the filamentary core by a hollow spindle spinning; or   the filamentary core is a helically wrapped filamentary core, the at least one control filament including at least two control filaments being helically wrapped around the at least one elastic filament.   
     
     
         17 - 18 . (canceled) 
     
     
         19 . An elastic composite yarn comprising:
 a filamentary core according to  claim 1 ;   a fibrous sheath surrounding the filamentary core, wherein the elastic composite yarn is a ring-spin elastic composite yarn or a core-spun elastic composite yarn.   
     
     
         20 . The elastic composite yarn according to  claim 19 , wherein the fibrous sheath has a linear mass density of at least 3 Ne and/or a maximum linear mass density of 80 Ne, 60 Ne, 55 Ne, 50 Ne, 30 Ne or 20 Ne. 
     
     
         21 . A fabric comprising a filamentary core according to  claim 1 . 
     
     
         22 . A method for manufacturing a filamentary core, in particular, or an elastic composite yarn, comprising:
 spinning at least one elastic filament and at least one control filament comprising a synthetic polymer into a filamentary core, wherein the at least one elastic filament comprises rubber, and/or the at least one control filament is biodegradable.   
     
     
         23 . The method for manufacturing according to  claim 22 , further comprising spinning a fibrous sheath around the filamentary core to obtain the elastic composite yarn.