Abstract: In view of the demand to replace wood pulp to preserve forests which is brought about by the recent trend to preserve natural resources from the terrestrial warming or the environmental pollution, this disclosure provides a yarn using cellulose-based filament yarn made from bamboo. This is achieved by a fiber yarn which is a yarn containing a filament of cellulose-based fiber made from a bamboo having a thickness of about 10 to about 600 dtex and number of twist of 0 to about 3,000 T/M.

Abstract: In view of the demand to replace wood pulp to preserve forests which is brought about by the recent trend to preserve natural resources from the terrestrial warming or the environmental pollution, this disclosure provides a yarn using cellulose-based filament yarn made from bamboo. This is achieved by a fiber yarn which is a yarn containing a filament of cellulose-based fiber made from a bamboo having a thickness of about 10 to about 600 dtex and number of twist of 0 to about 3,000 T/M.

Abstract: Crimped yarns that comprise a conjugate multifilament yarn having unique surface texture, dry touch, and stretchability; woven/knitted products comprising said crimped yarn; and production methods of crimped yarn as a conjugate multifilament yarn comprising polyester polymer components and has (a) number of crimps (CA): 2.5 crests/cm≦CA≦10 crests/cm, (b) number of developed crimps (CB): 8 crests/cm≦CB≦30 crests/cm, (c) shrinkage stress (TS): 0.0882≦TS (cN/dtex)≦0.221, (d) apparent shrinkage percentage (SC): 40%≦SC≦80%, and (e) shrinkage percentage of fiber in boiling water (SW): 2%≦SW≦8%, and produced by subjecting a crimp-forming conjugate multifilament yarn to relaxation-heat treatment.

Abstract: In a polyester multi-filament yarn consisting of at least two kinds of false twisted filament yarns having different sectional shapes, the present invention relates to a combined and multi-component false twisted filament yarn which comprises at least one kind of filament yarns having a specific sectional shape not having a recess and the other kind of filament yarns having a specific sectional shape having recesses, and wherein the filament yarns having the respective sectional shapes are dispersedly mix-woven. The present invention relates also to a method of producing such a combined and multi-component false twisted multi-filament yarn and a knitted/woven fabric obtained by using such a yarn.

Abstract: A composite crimped yarn comprising: at least two kinds of multifilament yarns, one of them being comprised of a crimped conjugate multifilament yarn comprising two kinds of polyester polymers different from each other in the heat shrinkability and positioned as a major component of the inner layer of the composite crimped yarn, the other of them being comprised of a crimped multifilament yarn of a single synthetic polymer and positioned as a major component in the outer layer of the composite crimped yarn. In the above, the length of the crimped multifilament yarn is 5 to 35% larger than that of the crimped conjugate multifilament yarn, part of the crimped multifilament yarn being migrated to the crimped conjugate multifilament yarn disposed in the inner layer and part of the crimped conjugate multifilament yarn being migrated to the crimped multifilament yarn disposed in the outer layer.

Abstract: A composite crimped yarn comprising: at least two kinds of multifilament yarns, one of them being comprised of a crimped conjugate multifilament yarn comprising two kinds of polyester polymers different from each other in the heat shrinkability and positioned as a major component of the inner layer of the composite crimped yarn, the other of them being comprised of a crimped multifilament yarn of a single synthetic polymer and positioned as a major component in the outer layer of the composite crimped yarn, In the above, the length of the crimped multifilament yarn is 5 to 35% larger than that of the crimped conjugate multifilament yarn, part of the crimped multifilament yarn being migrated to the crimped conjugate multifilament yarn disposed in the inner layer and part of the crimped conjugate multifilament yarn being migrated to the crimped multifilament yarn disposed in the outer layer.

Abstract: A composite crimped yarn comprising: at least two kinds of multifilament yarns, one of them being comprised of a crimped conjugate multifilament yarn comprising two kinds of polyester polymers different from each other in the heat shrinkability and positioned as a major component of the inner layer of the composite crimped yarn, the other of them being comprised of a crimped multifilament yarn of a single synthetic polymer and positioned as a major component in the outer layer of the composite crimped yarn. In the above, the length of the crimped multifilament yarn is 5 to 35% larger than that of the crimped conjugate multifilament yarn, part of the crimped multifilament yarn being migrated to the crimped conjugate multifilament yarn disposed in the inner layer and part of the crimped conjugate multifilament yarn being migrated to the crimped multifilament yarn disposed in the outer layer.