US 2007/0166540 A1Published application

Composite fiber structure and method for producing the same

AssigneeTeijin Fibers Limited

InventorsKenji Baba, Atsushi Suzuki

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Abstract

A web containing comprising side-by-side or eccentric core/shell conjugate short fibers A, which contain two kinds of polyester different from each other in intrinsic viscosity, and elastic conjugate fibers B, which contain a thermoplastic elastomer having a melting point lower by 40° C. or more than the two kinds of polyester, and a nonelastic polyester, with at least the thermoplastic elastomer being exposed on a surface of the fibers, is subjected to a heat treatment at a temperature equal to or higher than the melting point of the thermoplastic elastomer, so as to obtain a polyester elastic fiber structure, and then polyester woven or knitted fabrics are laminated adhered on both surfaces of the polyester elastic fiber structure with a polyester adhesive, followed by heat molding into a curved shape by a molding process depending on necessity, so as to obtain a-composite fiber structure.

Claims16

Dependent claims

A composite fiber structure comprising a polyester elastic fiber structure having adhered on both surfaces thereof polyester woven or knitted fabrics with a polyester adhesive, characterized in that the polyester elastic fiber structure satisfies the following requirements (1) to (5):

(1) the polyester elastic fiber structure contains side-by-side or eccentric core/shell conjugate short fibers A, which contain two kinds of polyester different from each other in intrinsic viscosity, have microcrimps of from 30 to 60 crimps per 25 mm exhibited by latent crimps, and are applied with mechanical crimps of from 7 to 15 crimps per 25 mm, as a matrix, and
dispersed and mixed therein elastic conjugate fibers B, which contain a thermoplastic elastomer having a melting point lower by 40° C. or more than the two kinds of polyester, and a nonelastic polyester, with at least the thermoplastic elastomer being exposed on a surface of the fibers,
(2) has thermally fixed points formed by heat-melting the conjugate short fibers A and the elastic conjugate fibers B intersecting with each other,
(3) has thermally fixed points formed with the elastic conjugate fibers B intersecting with each other,
(4) has a mixing ratio of the conjugate short fibers A and the elastic conjugate fibers B of from 90/10 to 10/90, and
(5) has a single filament fineness of the conjugate short fibers A of from 2 to 15 dtex.

3 more elements

A method for producing a composite fiber structure characterized by heat-treating a web comprising side-by-side or eccentric core/shell conjugate short fibers A, which contain two kinds of polyester different from each other in intrinsic viscosity by from 0.1 to 0.4 and are applied with mechanical crimps of from 7 to 15 crimps per 25 mm, and elastic conjugate fibers B, which contain a thermoplastic elastomer having a melting point lower by 40° C. or more than the two kinds of polyester, and a nonelastic polyester, with at least the thermoplastic elastomer being exposed on a surface of the fibers, at a temperature equal to or higher than the melting point of the thermoplastic elastomer, so as to obtain a polyester elastic fiber structure satisfying the following requirements (1) to (5):

(1) the polyester elastic fiber structure contains side-by-side or eccentric core/shell conjugate short fibers A, which contain two kinds of polyester polymers different from each other in intrinsic viscosity, have microcrimps of from 30 to 60 crimps per 25 mm exhibited by latent crimps, and are applied with mechanical crimps of from 7 to 15 crimps per 25 mm, as a matrix, and dispersed and mixed therein elastic conjugate fibers B, which contain a thermoplastic elastomer having a melting point lower by 40° C. or more than the two kinds of polyester polymers, and a nonelastic polyester, with at least the thermoplastic elastomer being exposed on a surface of the fibers,
(2) has thermally fixed points formed by heat-melting the conjugate short fibers A and the elastic conjugate fibers B intersecting with each other,
(3) has thermally fixed points formed with the elastic conjugate fibers B intersecting with each other,
(4) has a mixing ratio of the conjugate short fibers A and the elastic conjugate fibers B of from 90/10 to 10/90, and
(5) has a single filament fineness of the conjugate short fibers A of from 2 to 15 dtex, and then
laminating and adhering on both surfaces of the polyester elastic fiber structure polyester woven or knitted fabrics with a polyester adhesive as a hot-melt resin binder.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/587,390Filed 21 Apr 2005
Priority: JP 2004-12945026 Apr 2004
Published: 19 Jul 2007
Term ends: Not estimatedThe source records don’t support an estimate.

Classification25 codes

B32B 7/12
Interconnection of layers: using interposed adhesives or interposed materials with bonding properties
A41D 13/0506
Protecting only a particular body part: hip
A41D 31/285
Shock absorbing: using layered materials
B32B 5/04
Characterised by structural features of a fibrous or filamentary layer: characterised by a layer being specifically extensible by reason of its…