Preparation method of warp-knitting-imitated jacquard woven mesh fabric

Abstract

The invention relates to a preparation method of a warp-knitting-imitating jacquard woven mesh fabric, which mainly solves the problems of single form and monotonous cloth cover effect of the woven mesh fabric in the prior art, and comprises the following steps: 1) raw material selection: first warp: TPU composite yarn; the second warp yarns are UTPEE yarns; the first wefts are first polyamide high-elastic yarns; the second wefts are second polyamide high-elastic yarns; the third weft yarns are third polyamide high-elastic yarns; the fourth weft yarns are TPU yarns; the TPU composite yarn comprises a core layer and a skin layer wrapping the outer side of the core layer, the melting point of the core layer is not smaller than 190 DEG C, and the melting point of the skin layer is not larger than 170 DEG C; 2) weaving process: weaving the TPU composite yarn, the UTPEE yarn, the first polyamide high-elastic yarn, the second polyamide high-elastic yarn, the third polyamide high-elastic yarn and the TPU yarn into gray fabric in a one-twist-six form by a shuttle loom through a doup weaving method; (3) performing a pre-shaping process; 4) open-width washing; and 5) tentering and shaping.

Description

Technical Field

[0001] The invention relates to a method for preparing a warp-knitted jacquard woven mesh fabric. Background Art

[0002] Woven fabrics are made by weaving yarns in warp and weft directions in a shuttle loom. Therefore, they have the advantages of smooth surface, compact structure, durability, and not easy to wear and deform. Woven mesh fabrics are made by twisting the warp and weft threads in the shuttle loom to form yarn holes. The surface of the fabric has clear and evenly distributed yarn holes, the warp and weft density is small, the fabric is light and thin, and the air permeability is good, making it widely used in some summer clothing, curtains, mosquito nets, shoe uppers and other fabrics, but the hole type is mostly square mesh, the shape is single, and the fabric effect is monotonous. Summary of the invention

[0003] Therefore, in view of the above problems, the present invention provides a method for preparing a warp-knitted jacquard woven mesh fabric, which mainly solves the problem that the woven mesh fabric in the prior art has a single shape and a monotonous fabric effect.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for preparing a warp-knitted jacquard woven mesh fabric comprises the following steps:

[0006] 1) Raw material selection: first warp: TPU composite yarn; second warp: UTPEE yarn; first weft: first nylon high elastic yarn; second weft: second nylon high elastic yarn; third weft: third nylon high elastic yarn; fourth weft: TPU yarn; the TPU composite yarn includes a core layer and a skin layer coated on the outside of the core layer, the melting point of the core layer is not less than 190°C, and the melting point of the skin layer is not more than 170°C;

[0007] 2) Weaving process: The shuttle loom weaves the TPU composite yarn, UTPEE yarn, the first nylon high elastic yarn, the second nylon high elastic yarn, the third nylon high elastic yarn and the TPU yarn in the form of one twist and six to form a grey cloth by the shuttle weaving twisted heald method, so that the twisted warp in one twist group on the grey cloth is one TPU composite yarn, the ground warp is six UTPEE yarns, and one TPU yarn is distributed on one or more twist groups; then the yarn structure twisting is performed once; after the first nylon high elastic yarn, the second nylon high elastic yarn and the third nylon high elastic yarn are woven into the next horizontal row, the rib structure twisting is performed at the same time, and the adjacent two or more twist groups are firstly twisted with the rib structure and then with the yarn structure twisting, thereby forming a diamond or hexagonal mesh;

[0008] 3) Pre-setting process: Pre-setting is performed by using high-temperature hot air in a setting machine. The setting temperature is set at 170°C, and the input speed of the grey cloth is set at 15 yards / min. The hot air acts evenly on both sides of the grey cloth, so that the core layer of the TPU composite yarn does not melt and the skin layer is fully melted. When the temperature in the closed oven of the setting machine is higher than the glass transition temperature of the grey cloth, the polymer inside the fiber raw material is reorganized, thereby changing the surface size of the fabric;

[0009] 4) Open-width washing;

[0010] 5) Tenter setting: The high-temperature hot air is used for tenter setting through a setting machine. The temperature of the tenter setting is set at a temperature not higher than 160°C to prevent the cortex of the TPU composite yarn from melting again. The speed of inputting the grey cloth is set at 12 yards / min.

[0011] Furthermore, the warp density of the grey fabric is 51 strands / cm, the density of the grey fabric is 18 shuttles / cm, and the gram weight of the grey fabric is 396 g / m 2 .

[0012] Furthermore, the first cotton nylon high-elastic yarn includes a first thread and a second thread, the first thread and the second thread are spirally wound and connected, and the fiber fineness of the first thread and the second thread is 140D.

[0013] Furthermore, the third cotton nylon high-elastic yarn includes a third thread, a fourth thread, a fifth thread and a sixth thread, and the third thread, the fourth thread, the fifth thread and the sixth thread are spirally wound and connected, and the fiber fineness of the third thread, the fourth thread, the fifth thread and the sixth thread is 140D.

[0014] Furthermore, the fiber fineness of the second cotton nylon high-elastic yarn is 140D.

[0015] Furthermore, the fiber fineness of the TPU composite yarn is 900D.

[0016] Furthermore, the fiber fineness of the UTPEE yarn is 144D.

[0017] Furthermore, the fiber fineness of the TPU yarn is 350D.

[0018] By adopting the above technical scheme, the beneficial effect of the present invention is that the preparation method of the imitation warp knitted jacquard woven mesh fabric has the following advantages:

[0019] 1) TPU composite yarn is used in the grey cloth, with 190℃ high melting point TPU as the core layer and 170℃ low melting point TPU as the skin layer. When the setting temperature is higher than 170℃, the core layer does not melt, the skin layer melts and solidifies, bonding the woven warp and weft points to stabilize the mesh shape;

[0020] 2) The shuttle loom uses the shuttle weaving method to twist six heals. In one twist group, the twist warp is a TPU composite yarn, and the ground warp is six UTPEE yarns, all of which are transparent materials. The two are twisted with each other to make the surface present clear and evenly distributed yarn holes;

[0021] 3) Two or more twist groups are staggered and the yarn and rib weave are twisted at the same time, breaking the square shape of the traditional woven yarn holes and making the mesh shape rhombus or hexagonal, just like the warp knitting mesh;

[0022] 4) The controllable design of the floating length of the weft yarn on the surface is used to continuously arrange the weft weave points on the surface. When shaping, under the contraction of the TPU composite yarn and the UTPEE yarn, a slightly raised texture is revealed on the surface, just like a warp-knitted jacquard hook point jacquard;

[0023] 5) The pre-setting is done at high temperature and quickly, and the finished product is set at a slightly lower temperature and slowly. This makes the surface of the finished product stable during setting, and does not damage the internal structure of the raw material, extending the service life of the fabric. The grey fabric is woven from colored yarn and does not require post-dyeing treatment. It only needs to be washed in open width. At the same time, the fabric is degreased and modified with additives, thereby improving the morphological diversity of the woven mesh fabric and enriching the surface effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a grey cloth in an embodiment of the present invention;

[0025] Figure 2 Schematic diagram of the three-dimensional structure of the TPU composite yarn in an embodiment of the present invention;

[0026] Figure 3 is a schematic structural diagram of a first cotton nylon high-elastic yarn in an embodiment of the present invention;

[0027] Figure 4 is a schematic structural diagram of a third cotton nylon high-elastic yarn in an embodiment of the present invention;

[0028] Figure 5 This is a process flow chart of flat-width washing in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0030] The embodiments of the present invention are:

[0031] refer to Figures 1 to 5 As shown, a method for preparing a warp-knitted jacquard woven mesh fabric comprises the following steps:

[0032] 1) Raw material selection: first warp: TPU composite yarn 1; second warp: UTPEE yarn 2; first weft: first cotton nylon high elastic yarn 3; second weft: second cotton nylon high elastic yarn 4; third weft: third cotton nylon high elastic yarn 5; fourth weft: TPU yarn 6; the TPU composite yarn 1 includes a core layer 11 and a skin layer 12 coated on the outside of the core layer 11, the melting point of the core layer 11 is not less than 190°C, preferably 190°C, and the melting point of the skin layer 12 is not more than 170°C, preferably 170°C;

[0033] 2) Weaving process: The shuttle loom weaves the TPU composite yarn 1, the UTPEE yarn 2, the first nylon high elastic yarn 3, the second nylon high elastic yarn 4, the third nylon high elastic yarn 5 and the TPU yarn 6 in the form of one twist and six to form a grey cloth, so that the twist warp in one twist group on the grey cloth is one TPU composite yarn 1, the ground warp is six UTPEE yarns 2, and one TPU yarn 6 is distributed on one twist group; then the yarn structure twisting is performed once; after the first nylon high elastic yarn 3, the second nylon high elastic yarn 4 and the third nylon high elastic yarn 5 are woven into the next horizontal row, a rib structure twisting is performed at the same time, and the adjacent two twist groups are firstly twisted with rib structure and then with yarn structure twisting, thereby forming a rhombus or hexagonal mesh, the warp density of the grey cloth is 51 yarns / cm, the density of the grey cloth is 18 shuttles / cm, and the gram weight of the grey cloth is 396g / m 2 ;

[0034] Warp data:

[0035]

[0036]

[0037] Weft yarn data:

[0038]

[0039] Furthermore, the first nylon high-elastic yarn 3 includes a first wire 31 and a second wire 32, the first wire 31 and the second wire 32 are spirally wound and connected, and the fiber fineness of the first wire 31 and the second wire 32 is 140D, the third nylon high-elastic yarn 5 includes a third wire 51, a fourth wire 52, a fifth wire 53 and a sixth wire 54, the third wire 51, the fourth wire 52, the fifth wire 53 and the sixth wire 54 are spirally wound and connected, and the fiber fineness of the third wire 51, the fourth wire 52, the fifth wire 53 and the sixth wire 54 is 140D, the fiber fineness of the TPU composite yarn 1 is 900D, the fiber fineness of the UTPEE yarn 2 is 144D, and the fiber fineness of the TPU yarn 6 is 350D;

[0040] 3) Pre-setting process: Pre-setting is performed by using high-temperature hot air through a setting machine. The pre-setting temperature is set at 170°C, and the input speed of the grey cloth is set at 15 yards / min. The hot air acts evenly on both sides of the grey cloth, so that the core layer of the TPU composite yarn does not melt and the skin layer is fully melted. When the temperature in the closed oven of the setting machine is higher than the glass transition temperature of the grey cloth, the polymer inside the fiber raw material is reorganized, thereby changing the surface size of the fabric. Specifically, the pre-setting machine uses the EAG-2000-CBR-0 Taiwan Ligen setting machine. The grey cloth is fed into the setting machine along the weaving direction. First, the setting size of the fabric is stretched or shrunk by the overfeed roller device and the needle clip chain stretching device, and then it is set through multiple dry heat closed oven devices. After the set fabric is cooled, the pre-setting is completed;

[0041] 4) Open-width washing:

[0042] Grey fabrics are washed in open width and modified with additives. Refining agents and degreasing agents are used to remove impurities, stains and oil stains on the surface of fabrics. Chelating dispersants are used to prevent the formation of metal ion precipitation from affecting the color of fabrics and improve the washing effect. The open width washing speed is 12-15 yards / min. The specific dye auxiliary formula is as follows:

[0043]

[0044] First, add the refining agent at 60℃ in box 1, the temperature in box 2 rises to 80℃, add degreasing agent and chelating agent to remove impurities, and after hot boiling in boxes 3 and 4, the temperature in box 5 drops to 60℃ for washing, and then the temperature in box 6 drops to room temperature, squeezes water and absorbs dry, and finally the cloth is discharged;

[0045] 5) Tenter setting: The tenter setting is performed by using a high-temperature hot air tenter setting machine. The tenter setting temperature is set at a temperature not higher than 160° C. to prevent the skin layer 12 of the TPU composite yarn 1 from melting again. The input speed of the grey cloth is set at 12 yards / min.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A method for preparing a warp-knitted jacquard woven mesh fabric, characterized in that: The following steps are involved: 1) Raw material selection: first warp: TPU composite yarn; second warp: UTPEE yarn; first weft: first nylon high elastic yarn; second weft: second nylon high elastic yarn; third weft: third nylon high elastic yarn; fourth weft: TPU yarn; the TPU composite yarn includes a core layer and a skin layer coated on the outside of the core layer, the melting point of the core layer is not less than 190°C, and the melting point of the skin layer is not more than 170°C; 2) Weaving process: The shuttle loom weaves the TPU composite yarn, UTPEE yarn, the first nylon high elastic yarn, the second nylon high elastic yarn, the third nylon high elastic yarn and the TPU yarn in the form of one twist and six to form a grey cloth by the shuttle weaving twisted heald method, so that the twisted warp in one twist group on the grey cloth is one TPU composite yarn, the ground warp is six UTPEE yarns, and one TPU yarn is distributed on one or more twist groups; then the yarn structure twisting is performed once; after the first nylon high elastic yarn, the second nylon high elastic yarn and the third nylon high elastic yarn are woven into the next horizontal row, the rib structure twisting is performed at the same time, and the adjacent two or more twist groups are firstly twisted with the rib structure and then with the yarn structure twisting, thereby forming a diamond or hexagonal mesh; 3) Pre-setting process: Pre-setting is performed by using high-temperature hot air in a setting machine. The setting temperature is set at 170°C, and the input speed of the grey cloth is set at 15 yards / min. The hot air acts evenly on both sides of the grey cloth, so that the core layer of the TPU composite yarn does not melt and the skin layer is fully melted. When the temperature in the closed oven of the setting machine is higher than the glass transition temperature of the grey cloth, the polymer inside the fiber raw material is reorganized, thereby changing the surface size of the fabric; 4) Open-width washing; 5) Tenter setting: The high-temperature hot air is used for tenter setting through a setting machine. The temperature of the tenter setting is set at a temperature not higher than 160°C to prevent the cortex of the TPU composite yarn from melting again. The speed of inputting the grey cloth is set at 12 yards / min.

2. The method for preparing the warp-knitted jacquard woven mesh fabric according to claim 1, characterized in that: The warp density of the grey fabric is 51 strands / cm, the density of the grey fabric is 18 shuttles / cm, and the gram weight of the grey fabric is 396g / m 2 .

3. The method for preparing the warp knitted jacquard woven mesh fabric according to claim 2, characterized in that: The first cotton nylon high-elastic yarn includes a first thread and a second thread, the first thread and the second thread are spirally wound and connected, and the fiber fineness of the first thread and the second thread is 140D.

4. The method for preparing the warp-knitted jacquard woven mesh fabric according to claim 2 or 3, characterized in that: The third cotton nylon high-elastic yarn includes a third thread, a fourth thread, a fifth thread and a sixth thread, the third thread, the fourth thread, the fifth thread and the sixth thread are spirally wound and connected, and the fiber fineness of the third thread, the fourth thread, the fifth thread and the sixth thread is 140D.

5. The method for preparing the warp-knitted jacquard woven mesh fabric according to claim 4, characterized in that: The fiber fineness of the second cotton nylon high-elastic yarn is 140D.

6. The method for preparing the warp-knitted jacquard woven mesh fabric according to claim 2, characterized in that: The fiber fineness of the TPU composite yarn is 900D.

7. The method for preparing the warp-knitted jacquard woven mesh fabric according to claim 2, characterized in that: The fiber fineness of the UTPEE yarn is 144D.

8. The method for preparing the warp-knitted jacquard woven mesh fabric according to claim 2, characterized in that: The fiber fineness of the TPU yarn is 350D.

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