INVENTION OF THE HOLLOW STRETCH YARN

Abstract

A substantially hollow structured elastic core-spun yarn has a dissoluble core and main stretch core covered with single or multiple slivers. The dissoluble core would be partially or totally removed in yarn processing, or fabric finishing, or garment finishing, and removed with combination of different stages' processing.

Claims

1. A process for producing a composite main stretch core with substantially formed with hollow structure after removed the dissolvable core. The process comprising feeding of composite core and covered with sliver or slivers (shown as FIG. A1).

2. The process of claim 1, wherein the main stretch core is chosen from the group consisting multiple filaments, spun yarn and composite thereof.

3. The process of claim 1, wherein the fiber covering is made of materials chosen from the group of natural fibers, artificial fibers and synthetic fibers.

4. The process of claim 1, wherein the composite core is made of main stretch core and dissolvable core chosen from the group of natural fibers, artificial fibers and/or filaments, synthetic fibers and/or filaments and composite thereof.

5. The process of claim 1, wherein the composite core is fed in the way chosen from parallel feeding, ply yarn form, or core spun and composite thereof (shown as FIGS. A & B).

6. The process of removing the dissolvable core of composite core in chosen from yarn stage, fabric stage, garment stage and composite thereof (shown as FIG. C).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 1 is covering sheath; [0015] 2 is dissolvable core; [0016] 3 is main stretch core; [0017] 4 is hollow space after dissolvable core removed.

[0018] In the accompanying drawings given by the way of example:

[0019] FIG. A is vertical section of the way composite core fed in parallel form with FIG. A1 showing the cross section;

[0020] FIG. B is vertical section of the way composite core fed in ply yarn from with FIG. A1 showing the cross section;

[0021] FIG. C is vertical section of the way composite core fed in core spun from with FIG. C1 showing the cross section;

[0022] FIG. B1 is cross section of final hollow stretch yarn formed regardless using any feeding method above.

DETAILED DESCRIPTION OF THE INVENTION

[0023] The Hollow Stretch Yarn

[0024] According to the invention, main stretch core and dissolvable core is fed in the central of yarn during spinning. The drafting ratio of main stretch core is ranged 230% to 350% according to technical needs; regardless it is parallel (shown as FIG. A) placement way or ply yarn way (shown as FIG. B) or spun yarn core. The dissolvable core is under certain tension and drafting is below 5% as normally dissolvable fibers elasticity is low.

[0025] This invention relates to main stretch core with hollow structure that comprise dissolvable core with water-soluble vinylon or rayon and polyurethane filament(s). The invention also relates to stretch woven fabrics comprising such core spun (shown as FIG. C) yarn and the garments made from such fabric. The fabrics are substantially almost free from core exposure, as the portion of dissoluble core would be removed by hot water or hot alkaline bath in consequential fabric or garment processes. The final hollow structure of yarn provided free space (shown as FIG. B1) for main stretch core moving and shrinking in core of yarn, thus stretch fabric's recovery is improved. Because of interfering of the thick core in yarn spinning stage and the high shrinking of stretch yarn of hollow stretch yarn, the final sheath of yarn is an imperfect tube shape and result tinny path in fabric. Those tinny paths improved fabric breathability. The final tube like construction improved yarn-covering factor and more efficient in light reflection compared with stretch yarn with same final weight, less see-through is achieved. Also, the final tube like structure provided fabric with thicker body while without shoulder additional garment weight.

[0026] <Advance> a dissolvable core comprising water-soluble vinylon fibers yarn or filament and/or viscose rayon fibers and/or filament and filament(s) of polyurethane.

[0027] <Advance> The dissolvable core would be totally or partially removed by hot water bath for dissolvable vinylon or hot alkaline for viscose rayon during fabric finishing or garment washing process, wherein a hollow yarn structure to be formed.

[0028] <Advance> there are multiple ways for placing of dissoluble core and main stretch core. The application could be in (a) parallel form; (b) twisted form; (c) covered yarn form (shown as FIGS. A, B and C).

[0029] <Advance> The total core occupied total yarn linear weight in the rage from about 10% to 40%. The total yarn size can be ranged from about 4 to about 60 English cotton count.

[0030] <Advance> The hollow stretch yarn may be used in either warp or weft direction or both to produce warp stretch or weft stretch or bi-stretch woven fabrics.

[0031] There are no particular restrictions on the fibers or filament to be mixed with dissoluble core to achieve other purpose.

[0032] The woven fabric of the invention can be any type construction, included but not limited to plain weave, different types of twills, ribs, satins, dobby weaving, and jacquards.