Bicomponent elastic fiber composite material, elastic multifilament fiber including the composite material, and the manufacturing method for the same

Abstract

A bicomponent elastic fiber composite material, which has a linear density of 20-150 deniers, a stretchability of 300-600%, and a deformation rate of 0-25% after stretching to 400%. The bicomponent elastic fiber composite material includes an inner core fiber and a sheath outer layer, wherein the inner core fiber includes a polystyrne copolymer material of a styrene-butadiene block copolymer (SBS), a styrene-ethylene-butylene-styrene block copolymer (SEBS) or a thermoplastic polyolefin elastomer (TPO), or includes a thermoplastic polystyrene elastomer (TPS). The sheath outer layer includes polypropylene (PP) or polyethylene (PE). Thereby, the present invention can realize zero pollution while recycled and reused. In addition, the present invention has excellent properties of elasticity, dyeability, acid and alkali resistance, quick-drying and non-absorbency, antibacterial and deodorizing, and has a soft texture. Further, the elastic multifilament fiber including the composite material has the full effect of the bicomponent elastic fiber composite material.

What is claimed is: 
     
         1 . A bicomponent elastic fiber composite material, which is a bicomponent fiber structure with a core sheath or a core spun, comprising:
 an inner core fiber including a polystyrene copolymer material of a styrene-butadiene block copolymer (SBS), a styrene-ethylene-butylene-styrene block copolymer (SEBS) or a thermoplastic polyolefin elastomer (TPO), or including a thermoplastic polystyrene elastomer (TPS); and   a sheath outer layer cladding to an outer surface of the inner core fiber, and including polypropylene (PP) or polyethylene (PE);   wherein a ratio of a thickness of the sheath outer layer to a radius of the inner core fiber is between 1:9 to 9:1;   wherein the bicomponent elastic fiber composite material has a linear density of 20-150 deniers and a stretchability of 300-600%; and   wherein the bicomponent elastic fiber composite material has a deformation rate of 0-25% after stretching to 400%.   
     
     
         2 . The bicomponent elastic fiber composite material according to  claim 1 , wherein the inner core fiber has a stretchability of 100-600%. 
     
     
         3 . The bicomponent elastic fiber composite material according to  claim 1 , wherein the sheath outer layer has dyeability. 
     
     
         4 . The bicomponent elastic fiber composite material according to  claim 3 , wherein the polypropylene has a graft-dyeing base for dyeing. 
     
     
         5 . The bicomponent elastic fiber composite material according to  claim 1 , wherein the ratio of the thickness of the sheath outer layer to the radius of the inner core fiber is 9:1, and the bicomponent elastic fiber composite material has a linear density of 30 deniers and a stretchability of 500%, and the bicomponent elastic fiber composite material has a deformation rate of 1% after stretching to 400%. 
     
     
         6 . A manufacturing method for an elastic multifilament fiber, comprising the following steps:
 a stretching step: stretching a bicomponent elastic fiber composite material to several times;   a surrounding step: commonly surrounding a plurality of surrounding fibers to outside of the bicomponent elastic fiber composite material, and wherein an elasticity of each of the surrounding fibers is lower than that of the bicomponent elastic fiber composite material;   an air entangling step: commonly forming a plurality of air entanglement knots on the plurality of surrounding fibers and the bicomponent elastic fiber composite material to form an elastic multifilament fiber, and wherein the plurality of air entanglement knots divide the elastic multifilament fiber into a plurality of sections; and   a relaxing step: relaxing the bicomponent elastic fiber composite material such that the elastic multifilament fiber contracts back to a normal state by the deformation rate of the bicomponent elastic fiber composite material, and thus, in each section of the elastic multifilament fiber, a length of the bicomponent elastic fiber composite material is equal to a distance between adjacent two air entanglement knots, and a length of each of the surrounding fibers is greater than the distance between adjacent two air entanglement knots;   wherein the bicomponent elastic fiber composite material is a bicomponent fiber structure with a core sheath or a core spun, comprises an inner core fiber and a sheath outer layer;   wherein the inner core fiber includes a polystyrene copolymer material of a styrene-butadiene block copolymer (SBS), a styrene-ethylene-butylene-styrene block copolymer (SEBS) or a thermoplastic polyolefin elastomer (TPO), or includes a thermoplastic polystyrene elastomer (TPS);   wherein the sheath outer layer clads to an outer surface of the inner core fiber, and includes polypropylene (PP) or polyethylene (PE);   wherein a ratio of a thickness of the sheath outer layer to a radius of the inner core fiber is between 1:9 to 9:1;   wherein the bicomponent elastic fiber composite material has a linear density of 20-150 deniers and a stretchability of 300-600%; and   wherein the bicomponent elastic fiber composite material has a deformation rate of 0-25% after stretching to 400%.   
     
     
         7 . The manufacturing method according to  claim 6 , wherein the bicomponent elastic fiber composite material is stretched to three times in the stretching step. 
     
     
         8 . The manufacturing method according to  claim 6 , wherein the material of each of the surrounding fibers is polyester. 
     
     
         9 . The manufacturing method according to  claim 6 , wherein the sheath outer layer has dyeability. 
     
     
         10 . The manufacturing method according to  claim 6 , wherein the polypropylene has a graft-dyeing base for dyeing. 
     
     
         11 . The manufacturing method according to  claim 6 , wherein the ratio of the thickness of the sheath outer layer to the radius of the inner core fiber is 9:1, and the bicomponent elastic fiber composite material has a linear density of 30 deniers and a stretchability of 500%, and the bicomponent elastic fiber composite material has a deformation rate of 1% after stretching to 400%. 
     
     
         12 . An elastic multifilament fiber, comprising: a bicomponent elastic fiber composite material and a plurality of surrounding fibers;
 wherein the bicomponent elastic fiber composite material is a bicomponent fiber structure with a core sheath or a core spun, comprises an inner core fiber and a sheath outer layer;   wherein the inner core fiber includes a polystyrene copolymer material of a styrene-butadiene block copolymer (SBS), a styrene-ethylene-butylene-styrene block copolymer (SEBS) or a thermoplastic polyolefin elastomer (TPO), or includes a thermoplastic polystyrene elastomer (TPS);   wherein the sheath outer layer clads to an outer surface of the inner core fiber, and includes polypropylene (PP) or polyethylene (PE);   wherein a ratio of a thickness of the sheath outer layer to a radius of the inner core fiber is between 1:9 to 9:1;   wherein the bicomponent elastic fiber composite material has a linear density of 20-150 deniers and a stretchability of 300-600%;   wherein the bicomponent elastic fiber composite material has a deformation rate of 0-25% after stretching to 400%;   wherein the plurality of surrounding fibers commonly surround outside of the bicomponent elastic fiber composite material and commonly contact the bicomponent elastic fiber composite material by a plurality of air entanglement knots, and an elasticity of each of the surrounding fibers is lower than that of the bicomponent elastic fiber composite material;   wherein the plurality of air entanglement knots divide the elastic multifilament fiber into a plurality of sections; and   wherein in each section of the elastic multifilament fiber, a length of the bicomponent elastic fiber composite material is equal to a distance between adjacent two air entanglement knots, and a length of each of the surrounding fibers is greater than the distance between adjacent two air entanglement knots.   
     
     
         13 . The elastic multifilament fiber according to  claim 12 , wherein the material of each of the surrounding fibers is polyester. 
     
     
         14 . The elastic multifilament fiber according to  claim 12 , wherein the sheath outer layer has dyeability. 
     
     
         15 . The elastic multifilament fiber according to  claim 12 , wherein the polypropylene has a graft-dyeing base for dyeing. 
     
     
         16 . The elastic multifilament fiber according to  claim 12 , wherein the ratio of the thickness of the sheath outer layer to the radius of the inner core fiber is 9:1, and the bicomponent elastic fiber composite material has a linear density of 30 deniers and a stretchability of 500%, and the bicomponent elastic fiber composite material has a deformation rate of 1% after stretching to 400%.