Yarn comprising a core and a sheath

Patent metadata

Field	Value
Publication number	US-12134840-B2
Application number	US-201916524450-A
Country	US
Kind code	B2
Filing date	Jul 29, 2019
Priority date	Jul 27, 2018
Publication date	Nov 5, 2024
Grant date	Nov 5, 2024

Abstract

A composite yarn ( 1 ) having a core ( 2 ) and a sheath ( 3 ), preferably comprising staple fibers ( 3 a ), said core ( 2 ) comprising at least one polymeric core fiber ( 21 ), preferably a plurality of core fibers ( 21 ), made of polymeric material, wherein the total amount of the core fibers ( 21 ) is at least 35% by weight of the total weight of the composite yarn ( 1 ), and wherein the core fiber ( 21 ) and the sheath ( 3 ) are spun together.

First claim

The invention claimed is:

1. A composite yarn ( 1 ) having a core ( 2 ) and a sheath ( 3 ), said sheath comprising staple fibers ( 3 a ) said core ( 2 ) comprising at least one polymeric core fiber ( 21 ), made of polymeric material,
wherein the total amount of the core fibers ( 21 ) is at least 35% by weight of the total weight of the composite yarn ( 1 ), and
wherein the core fiber ( 21 ) and the sheath ( 3 ) are spun together,
wherein the core fibers ( 21 ) have a linear density of 14 denier or less,
wherein the core fibers ( 21 ) are non-elastomeric filaments and the core comprises at least 12 core fibers,
said core ( 2 ) further comprising a plurality of elastomeric filaments ( 22 ), the core fibers ( 21 ) and the plurality of elastomeric filaments ( 22 ) being connected together in a continuous way such that the core fibers and the plurality of elastomeric filaments are attached at a plurality of points, and
wherein the core fibers are Drawn Textured Yarns (DTY) and the core fibers ( 21 ) and the elastomeric filaments ( 22 ) are intertwined such that the elastomeric filaments ( 22 ) are coiled about the core fibers ( 21 ).

2. The composite yarn ( 1 ) according to claim 1 , wherein the core fibers ( 21 ) and the sheath ( 3 ) are spun together by ring spinning with one or more roving sources for the sheath.

3. The composite yarn ( 1 ) according to claim 2 , wherein the amount of filaments having elastic properties is in the range of 1% to 60% of the total weight of the composite yarn ( 1 ).

4. The composite yarn ( 1 ) according to claim 1 , wherein at least part of said core fibers ( 21 ) are provided as a bundle of core fibers or as a core yarn ( 20 ).

5. The composite yarn ( 1 ) according to claim 1 , wherein the total amount of core fibers ( 21 ) is in the range of 35% to 90% by weight of the composite yarn ( 1 ).

6. The composite yarn ( 1 ) according to claim 1 , wherein said core fibers ( 21 ) are made of materials selected from polyester polymers and copolymers, polyamide polymers, copolymers and mixtures thereof, said core fibers ( 21 ) comprising one or more of:
PET (polyethylene terephthalate) filaments;
PBT (polybutylene terephthalate) filaments;
PTT (Poly tri-methylene terephthalate) filaments;
PTMT (poly tetra-methylene terephthalate) filaments;
filaments made of copolymer of one or more of PET, PBT, PTT, PTMT;
PTT/PET bicomponent filaments,
PTT/PBT bicomponent filaments;
PTMT/PET bicomponent filaments.

7. The composite yarn ( 1 ) according to claim 1 , wherein a twist multiple of the composite yarn ( 1 ) is in the range of 1.2 to 3.5.

8. A fabric ( 100 ) or an article ( 101 ) including the composite yarn ( 1 ) according to claim 1 .

9. A method of preparing the composite yarn ( 1 ) according to claim 1 , comprising the steps of:
providing a core ( 2 ) comprising a plurality of core fibers ( 21 ) made of polymeric material, and a plurality of elastomeric filaments ( 22 );
providing a sheath ( 3 ) of inelastic staple fibers to cover said core ( 2 ), said sheath comprising staple fibers ( 3 a ); and
spinning together said filaments and said staple fibers of the sheath ( 3 );
wherein the total amount of said core fibers ( 21 ) is at least 35% by weight of the total weight of the composite yarn ( 1 ),
wherein the core fibers ( 21 ) are drawn textured yarns having a linear density of 14 denier or less,
wherein the core fibers are non-elastomeric filaments,
wherein the core comprises at least 12 core fibers,
wherein the step of providing includes the core fibers and the plurality of elastomeric filaments being connected together in a continuous way via a co-extrusion step in which they are forced through a restriction such that they remain attached at a plurality of points after exiting the restriction, and
wherein the core fibers ( 21 ) and the elastomeric filaments ( 22 ) are intertwined such that the elastomeric filaments ( 22 ) are twisted about the core fibers ( 21 ) after said spinning step.

10. The method according to claim 9 , wherein the core fibers ( 21 ) and the plurality of elastomeric filaments ( 22 ) are combined together before the spinning step.

11. The method according to claim 9 , wherein the core ( 2 ) and the sheath ( 3 ), are combined by ring spinning.

12. The method according to claim 9 , wherein the elastomeric filaments ( 22 ) are in a coiled orientation about the core ( 2 ).

13. The composite yarn according to claim 1 , wherein the elastomeric filaments are drafted with a draft ratio between 1.5 to 5.5.

14. The method according to claim 9 , wherein the elastomeric filaments are drafted with a draft ratio between 1.5 to 5.5 before being combined with the core fibers.

15. The method according to claim 14 , wherein the core fibers are textured filaments drafted before being co-extruded with the drafted elastomeric filaments.

16. The composite yarn ( 1 ) according to claim 1 , wherein a total count of said plurality of elastomeric filaments ( 22 ) comprises 20 to 240 den.

17. The composite yarn ( 1 ) according to claim 16 , wherein a total count of the core ( 2 ) comprises 5 to 1000 den.

18. A method of preparing a composite yarn comprising:
providing a core ( 2 ) comprising a plurality of at least 12 core fibers ( 21 ) made of polymeric material, and at least one elastomeric filament ( 22 ), the plurality of core fibers ( 21 ) comprising Drawn Textured Yarns (DTY);
providing a sheath ( 3 ) of inelastic staple fibers to cover said core ( 2 ), said sheath comprising staple fibers ( 3 a );
connecting together the core fibers ( 21 ) and the at least one elastomeric filament ( 22 ) in a continuous way via a co-extrusion step in which they are forced through a restriction in a tensioned state and remain attached at a plurality of points after exiting the restriction; and
spinning together said core ( 2 ) and said staple fibers of the sheath ( 3 ),
wherein the total amount of said core fibers ( 21 ) is at least 35% by weight of the total weight of the composite yarn ( 1 ), the core fibers ( 21 ) have a linear density of 14 denier or less and are non-elastomeric filaments, and
the step of spinning together produces the core fibers ( 21 ) and the elastomeric filaments ( 22 ) being intertwined such that the elastomeric filaments ( 22 ) are coiled about the core fibers ( 21 ).

19. The method of claim 18 , wherein said spinning produces said composite yarn having a twist multiple in a range of 1.2 to 3.5.

20. The method of claim 18 , wherein a total count of said at least one elastomeric filament comprises 20 to 240 den.

21. The method of claim 20 , wherein a total count of the core comprises 5 to 1000 den.

22. A composite yarn ( 1 ) having a core ( 2 ) and a sheath ( 3 ), said sheath comprising staple fibers ( 3 a ) said core ( 2 ) comprising at least one polymeric core fiber ( 21 ), made of polymeric material,
wherein the total amount of the core fibers ( 21 ) is at least 35% by weight of the total weight of the composite yarn ( 1 ), and
wherein the core fiber ( 21 ) and the sheath ( 3 ) are spun together,
wherein the core fibers ( 21 ) have a linear density of 14 denier or less,
wherein the core fibers ( 21 ) are non-elastomeric filaments and the core comprises at least 12 core fibers,
said core ( 2 ) further comprising a plurality of elastomeric filaments ( 22 ), the core fibers ( 21 ) and the plurality of elastomeric filaments ( 22 ) being connected together in a continuous way such that the core fiber

Assignees

• Sanko Tekstil Isletmeleri San Ve Tic As
• Sanko Tekstill Isletmeleri San Ve Tic A S

Inventors

• Konukoǧlu Fatih
• Özden Erdogan Baris
• Aǧzikara Şeref
• Erkuş Ertuǧ
• Zeyrek Mustafa
• Tuncer Eşref
• Demirbüken Sedat
• Evran Erkan

Classifications

• D10B2401/061

  elastic · CPC title

• D02G3/32

  Elastic yarns or threads {; Production of plied or cored yarns, one of which is elastic} · CPC title

• D01F8/14

  with at least one polyester as constituent · CPC title

• D02G3/04 Primary

  Blended or other yarns or threads containing components made from different materials · CPC title

• D02G3/36 Primary

  Cored or coated yarns or threads ({D02G3/34, D02G3/40 take precedence}; elastic yarns or threads D02G3/32) · CPC title