Multi-bar warp knitted fabric and knitting method thereof

Abstract

The present invention discloses a multi-bar warp knitted fabric and a knitting method thereof. The fabric comprises a ground weave and at least one group of elastic yarns, wherein each group of elastic yarns is composed of two elastic yarns, characterized in that the two elastic yarns of each group are inlaid in opposite directions on at least 90% of the loops in one same wale of the ground weave. The fabric has excellent characteristics, including: in addition to maintaining the soft and comfortable hand feel and general physical properties of the fabric, the elastic yarns are not easy to wash out and fly out, and the fabric can be used with a lower finished density, thereby reducing production costs.

Claims

1. A multi-bar warp knitted fabric, the fabric comprising a ground weave and at least one group of elastic yarns, wherein each group of elastic yarns is composed of two elastic yarns, characterized in that the two elastic yarns of each group are inlaid in opposite directions on at least 90% of the loops in one same wale of the ground weave, wherein the two elastic yarns of each group are inlaid symmetrically in opposite directions, forming a twist-like or twisted rope-like structure, in which the two elastic yarns inlaid symmetrically in opposite directions are twisted with the loops of the ground weave together, thereby enhancing the binding force of the loops of the ground weave on the elastic yarns.

2. The multi-bar warp knitted fabric according to claim 1, characterized in that one group of elastic yarns are inlaid in opposite directions on at least 90% of the loops in each wale of the ground weave.

3. The multi-bar warp knitted fabric according to claim 1, characterized in that the elastic yarns contain spandex.

4. The multi-bar warp knitted fabric according to claim 1, characterized in that the elastic yarns have a fineness of less than or equal to 1000 denier.

5. A method for knitting a multi-bar warp knitted fabric, the method comprising the steps of: providing at least one group of elastic yarns, wherein each group of elastic yarns is composed of two elastic yarns; inlaying the two elastic yarns of each group in opposite directions on at least 90% of the loops in one same wale of the ground weave, wherein the step of inlaying the two elastic yarns of each group in opposite directions is carried out by inlaying the two elastic yarns of each group in opposite directions symmetrically, forming a twist-like or twisted rope-like structure, the two elastic yarns inlaid in opposite directions symmetrically being twisted with the loops of the ground weave together, thereby enhancing the binding force of the loops of the ground weave on the elastic yarns.

Description

DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a lapping diagram of two elastic yarns inlaid in opposite directions symmetrically according to the exemplary embodiment of the present invention;

(2) FIG. 2 shows an arrangement of the guide bars of a multi-bar warp knitting machine in the prior art;

(3) FIG. 3 shows an arrangement of the guide bars of a multi-bar warp knitting machine according to an exemplary embodiment of the present invention.

(4) Wherein: 1—a first elastic yarn; 2—a second elastic yarn; 3—ground weave loops; 11—ground guide bar; 12—pattern guide bar; 13—jacquard guide bar; 14—a first elastic yarn inlay guide bar; 15—a second elastic yarn inlay guide bar.

DESCRIPTION OF PREFERRED EMBODIMENTS

(5) The technical solutions in the exemplary embodiments of the present invention will be described clearly and completely below with reference to the drawings of the present invention. Obviously, the described embodiments are only exemplary embodiments of the present invention, rather than all the embodiments. Based on the exemplary embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the protection scope of the present invention.

(6) In the present invention, the two elastic yarns are inlaid in opposite directions (preferably, the two elastic yarns are inlaid symmetrically in opposite directions) by using a specific multi-bar warp knitting machine with two elastic yarn inlay bars, i.e. adding one more inlay bar to a conventional multi-bar warp knitting machine, as shown with reference numerals 14, 15 in FIG. 3. According to various types of inlay, machine control files are generated, and machine-ready pattern files in the system are generated according to the requirements of patterns and mesh in the design system.

(7) The resulting fabric is processed according to the general multi-bar warp knitted fabric producing and finishing processes.

Example: As Shown in FIG. 1

(8) The knitting method of inlaying elastic yarns in opposite directions symmetrically by elastic yarn inlay bars is carried out on the specific multi-bar warp knitting machine according to the present invention, and the multi-bar warp knitted fabric comprises a ground weave and elastic yarns inlaid in opposite directions, the inlay denotation, threading manner and machine gauge are expressed as follows:

(9) The first elastic yarn inlay bar 1: 1-1/0-0//, fully threaded, 24E

(10) The second elastic yarn inlay bar 2: 0-0/1-1//, fully threaded, 24E or expressed as follows:

(11) The first elastic yarn inlay bar 1: 2-2/0-0//, fully threaded, 24E

(12) The second elastic yarn inlay bar 2: 0-0/2-2//, fully threaded, 24E

(13) In the present invention, the warp knitted fabric with two elastic yarns inlaid symmetrically in opposite directions by two elastic yarn inlay bars changes the form of loops of the pillar stitch in nature, in which the two elastic yarns inlaid oppositely are twisted with the loops together. Such structure greatly enhances the binding force of the loops of the pillar stitch on the elastic yarns, making the ground weave more stable and not easy to disperse. Even in the case of a lower finished product density, it can pass the fly-out test and the washing test.

(14) The following table shows the comparison of washing test between the fabric according to the present invention and the HN305E pattern fabric in the prior art. Wherein the HN305E pattern fabric as a comparative example has a ground weave, and there is only one elastic yarn (i.e. spandex yarn) inlaid in each wale of pillar stitch of the ground weave. The washing test is carried out according to the standard ISO 6330 4M F 5 Cycles, and the washing process is simulated by washing 5 times.

(15) TABLE-US-00001 Test results Fabric Parameter setting of washing 5 times HN305E loom pick count: 20 severe pattern finished product density: 38 snagging, fabric ground yarn raw materials: N2390 20D/34F, warp run-in: 980MM/R severe fluffing jacquard yarn: N0362 20D/17F, warp run-in: 380MM/R spandex yarn: E0882 70D, warp run-in: 230MM/R Fabric loom pick count: 20 qualified knitted finished product density: 38 snagging, according ground yarn raw materials: N2390 20D/34F, warp run-in: 980MM/R qualified to the jacquard yarn: N0362 20D/17F, warp run-in: 380MM/R fluffing present spandex yarn 1: E0882 70D, warp run-in: 230MM/R invention spandex yarn 2: E2072 30D, warp run-in: 400MM/R

(16) The structure of the fabric of the present invention effectively solves the problems of fluffing and snagging of fabrics when washing.

(17) The invention relates to a series of researches and developments of warp knitting machines. The elastic yarn guide bar work line is rearranged. The research and development form of the machines is not limited and will not be described in detail here. However, any form of fabrics containing two elastic yarns inlaid in opposite directions by two inlay bars on multi-bar warp knitting machines is within the protection scope of the present invention.

(18) The foregoing are only exemplary embodiments of the application and are not intended to limit the invention. Any modification, equivalent replacement, improvement, etc. to the structure or process made within the spirit and principles of the application or applying the present invention to other relevant technical field directly or indirectly, will be covered within the scope of protection for this invention.