Warp-knitted mesh fabric

Abstract

Disclosed in the present invention is a warp-knitted mesh fabric, comprising a fabric body. The fabric body is formed by knitting at least two different yarns, comprising an elastic yarn Y3 and a non-elastic yarn, the non-elastic yarn comprising a non-elastic yarn Y1 and a non-elastic yarn Y2; the non-elastic yarn Y1 and the non-elastic yarn Y2 are threaded on a front guide bar and are knitted in a 1-in-1-out threading sequence, and the total number of stitch transfers in a cycle structure is 3; when the non-elastic yarn Y1 and the non-elastic yarn Y2 undergo needle back shogging during each knitting process, the needle back shogging directions thereof are opposite, so as to form a symmetrical mesh structure formed by a plurality of air-permeable meshes; the elastic yarn Y3 is knitted in a full-set warp-threading manner on a back guide bar on the backing of the fabric body to form a flat surface; and the elastic yarn Y3 is knitted to form underlaps, the underlaps passing through the air-permeable meshes. The present invention has the characteristics of good quick-dry property, resilience, air permeability and being readily cut to any shape.

Description

A warp-knitted mesh fabric TECHNICAL FIELD

[0001] The present application relates to the technical field of textile fabrics, in particular to a warp-knitted mesh fabric with good quick-drying property, recovery property and air permeability. BACKGROUND

[0002] With the improvement of living standards, people's requirements for clothing have changed from comfort and appearance to the coexistence of multiple functions, requiring not only comfortable and beautiful fabrics, but also moisture-wicking and air-permeable fabrics, and as much as possible arbitrary cutting to make the fabric more fitted and wear-free.

[0003] The arbitrary cutting fabric on the market is generally double-sided fabric and Spacer for weft knitting, flat fabric and arbitrary cutting mesh fabric for warp knitting. The structure of the arbitrary cutting fabric of weft-knitted fabric is relatively limited, and most of them are flat fabrics. The arbitrary cutting fabric of warp-knitted fabric is generally of the same structure, such as the same heavy warp flat structure with good stability, the same double warp flat, the same warp pile flat, the same warp satin structure, etc. For example, the patent CN110042551A mentions that the fabric is flat in appearance and relatively tight, with high spandex content, which is easy to cause discomfort when sweating a lot during exercise. Another type is the arbitrary cutting mesh fabric mentioned in the patent JP5443524B2. This type of fabric is formed by two filament symmetrical structures and two spandex symmetrical structures, forming a mesh hole. The balance of the symmetrical structure can achieve the effect of no edge curling. This type of fabric is relatively soft and flat, with large mesh holes and good air permeability. However, it has good light transmission and no privacy, and the weft direction is easy to deform during wearing and cannot quickly recover after stretching. TECHNICAL PROBLEM

[0004] The present application provides a warp-knitted mesh fabric with good quick-drying property, recovery property, air permeability and arbitrary cutting characteristics. TECHNICAL SOLUTION

[0005] A warp-knitted mesh fabric, comprising a fabric body, the fabric body is knitted by at least two different yarns, including an elastic yarn Y3 and a non-elastic yarn, wherein the non-elastic yarn includes a non-elastic yarn Y1 and a non-elastic yarn Y2, the non-elastic yarn Y1 and the non-elastic yarn Y2 are knitted on the front guide bar in a 1-in-1-out knitting mode, and the total number of needles in one cycle structure is 3 needles. When the non-elastic yarn Y1 and the non-elastic yarn Y2 are knitted with needle back transposition each time, the directions of the needle back transposition are opposite, forming a symmetrical mesh hole structure composed of a plurality of air-permeable mesh holes; the elastic yarn Y3 is knitted on the back guide bar in a full-warp knitting mode to form a flat surface on the inner layer of the fabric body, the elastic yarn Y3 is knitted to form an extension line, and the extension line passes through the air-permeable mesh hole, and the size of the air-permeable mesh hole is calculated and set according to the following formula:

[0006] S = (L x W) / 1000 2 ;

[0007] WPC = cm

[0008] CPC = cm

[0009] q = the warp-drawing ratio

[0010] D = the denier of the elastic yarn

[0011] n = the number of segments of the extended thread of the elastic yarn Y3 present in one air-permeable mesh.

[0012] As a further improvement, the fabric body comprises non-elastic loops and elastic loops, the non-elastic loops comprising Y1 loops knitted from non-elastic yarn Y1 and Y2 loops knitted from non-elastic yarn Y2, and the elastic loops knitted from elastic yarn Y3, the non-elastic yarn Y2 and the non-elastic yarn Y1 being the same in the number of needle pitches and being knitted into loops in opposite or relative directions synchronously, and the tail ends of the elastic loops being adhered together to form a closed loop structure.

[0013] As a further improvement, the denier of the elastic yarn is ≤ the denier of the non-elastic yarn, and the ratio of the denier of the elastic yarn to the denier of the non-elastic yarn is 0.4-0.8.

[0014] As a further improvement, the difference between the deniers of the non-elastic yarn Y1 and the non-elastic yarn Y2 is ≤ 30D.

[0015] As a further improvement, the non-elastic yarn Y1 and the non-elastic yarn Y2 form air-permeable meshes of the same size, and the height of the air-permeable meshes in the longitudinal direction is ≤ 5 fabric loops.

[0016] As a further improvement, the non-elastic yarn Y1 has a structure of 1-0 / 1-2 / 2-3 / 2-1 / / , the non-elastic yarn Y2 has a structure of 2-3 / 2-1 / 1-0 / 1-2 / / , and the elastic yarn Y3 has a structure of 1-0 / 1-2 / / ; or the non-elastic yarn Y1 has a structure of 1-0 / 1-2 / 2-3 / 2-1 / / , the non-elastic yarn Y2 has a structure of 2-3 / 2-1 / 1-0 / 1-2 / / , and the elastic yarn Y3 has a structure of 1-2 / 1-0 / / .

[0017] As a further improvement, the non-elastic yarn Y1 has a structure of 1-0 / 1-2 / 2-1 / 2-3 / 2-1 / 1-2 / / , the non-elastic yarn Y2 has a structure of 2-3 / 2-1 / 1-2 / 1-0 / 1-2 / 2-1 / / , and the elastic yarn Y3 has a structure of 1-0 / 1-2 / / ; or the non-elastic yarn Y1 has a structure of 1-0 / 1-2 / 2-1 / 2-3 / 2-1 / 1-2 / / , the non-elastic yarn Y2 has a structure of 2-3 / 2-1 / 1-2 / 1-0 / 1-2 / 2-1 / / , and the elastic yarn Y3 has a structure of 1-2 / 1-0 / / .

[0018] As a further improvement, the fabric body has one or more combinations of full open loops, full close loops and open-close loops in each harness when weaving.

[0019] As a further improvement, the longitudinal density of the fabric body is between 76 and 140 per inch, preferably the longitudinal density of the fabric body is between 45 and 74 per inch.

[0020] As a further improvement, the non-elastic yarn Y1 has a structure of FDY spinning of filamentized fibers, the non-elastic yarn Y2 has a structure of FDY spinning of filamentized fibers; or the non-elastic yarn Y1 or the non-elastic yarn Y2 is a multi-fiber yarn, and the fiber count of the multi-fiber yarn is ≥ denier; or the non-elastic yarn Y1 or the non-elastic yarn Y2 is a profiled yarn, and the cross section of the yarn is a cross section, a Y-shaped cross section, a C-shaped cross section or a wave-shaped cross section. Advantages

[0021] The present application utilizes the mutual matching of non-elastic yarns and elastic yarns and adopts a defined weave structure to weave, form air-permeable meshes, increase the air permeability by stretching the air-permeable meshes, reduce the problems of selvedge and open mouth after cutting the fabric by utilizing the mutual connection between different loops formed during weaving, and has the property of preventing the fabric from being scattered. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 is an explanatory diagram of air permeability and air-permeable aperture area;

[0023] Fig. 2 is a structural schematic diagram of the first embodiment and the second embodiment of the present application;

[0024] Fig. 3 is a structural schematic diagram of the third embodiment of the present application;

[0025] Fig. 4 is a structural schematic diagram of the fourth embodiment of the present application;

[0026] Fig. 5 is a structural schematic diagram of the fifth embodiment of the present application;

[0027] Fig. 6 is a schematic view of a tissue structure according to the present application. Best Mode for Carrying Out the Invention

[0028] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters in the drawings are generally employed to designate the same or like components throughout the drawings. The embodiments described below are illustrative of the present application and are not intended to be limiting thereof.

[0029] In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like, are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0030] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected. It can be mechanical connection, or electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Referring to Figs. 1-5, a warp-knitted mesh fabric includes a fabric body, the fabric body is knitted by at least two different yarns, including an elastic yarn Y3 and non-elastic yarns, wherein the non-elastic yarns include non-elastic yarn Y1 and non-elastic yarn Y2, the non-elastic yarn Y1 and non-elastic yarn Y2 are threaded on the front guide bar and knitted in a 1-thread 1-empty threading mode, and the total number of needles in one cycle structure is 3 needles, the non-elastic yarn Y1 and non-elastic yarn Y2 are knitted with opposite needle back transposition directions each time, forming a symmetrical mesh structure composed of a plurality of breathable mesh holes; the elastic yarn Y3 is knitted on the back guide bar in a full-thread threading mode to form a flat surface on the inner layer of the fabric body, the elastic yarn Y3 is knitted to form an extension line, and the extension line passes through the breathable mesh hole, so that there is at least one partial segment of the elastic yarn Y3 in one breathable mesh hole. The elastic yarn Y3 can be spandex, which has good elasticity. The existence of a plurality of breathable mesh holes forms a mesh fabric. During knitting, the number of needles spanned by the non-elastic yarn Y1 and non-elastic yarn Y2 can be the same.

[0032] The number of stitches per guide bar of the fabric body during knitting is one or a combination of full open loops, full closed loops, and open-closed loops.

[0033] The fabric body includes non-elastic loops and elastic loops, the non-elastic loops include Y1 loops knitted by non-elastic yarn Y1 and Y2 loops knitted by non-elastic yarn Y2, and the elastic loops are knitted by elastic yarn Y3, the non-elastic yarn Y2 and the non-elastic yarn Y1 have the same number of needle spans and are knitted into loops by synchronously laying in opposite or relative directions, and the tail of the elastic loop is adhered together to form a closed loop structure.

[0034] The elastic yarn Y3 is selected as spandex. By passing the extension line of the elastic yarn Y3 through the air-permeable mesh, the spandex remains in a natural state of being short and thick when not stretched, at which time the spandex occupies a larger area of the air-permeable mesh. The spandex becomes thin and long during the stretching process, which is equivalent to blocking the air-permeable mesh and occupying a smaller area, and the air permeability of the air-permeable mesh is increased. During processing, the size of the air-permeable mesh is fixed by high-temperature pre-setting, so that a mesh fabric with good air permeability can be obtained. From the perspective of mechanical force, in a complete cycle pattern, the non-elastic yarn Y1 is always subjected to a force that causes the Y1 loop to be skewed when it is inlaid at a certain position. However, the non-elastic yarn Y2 has the same number of crossing needle pitches as the non-elastic yarn Y1 and is inlaid into loops in the opposite or relative direction synchronously. The skewing direction of the Y2 loop is opposite to that of the Y1 loop, so that the force system of the filament is balanced, and the fabric has good rolling properties. The spandex is fully inserted into the warp flat structure. Each loop structure has a filament loop, i.e., a non-elastic loop, and a spandex loop, i.e., an elastic loop. Due to the property of spandex that it will adhere under high temperature, the spandex loop tail adheres together after high-temperature pre-setting, forming a closed loop, which can effectively reduce the problems of burrs and loose ends after cutting the fabric, so that the fabric has the problem of not producing burrs and loose ends regardless of the cutting. The inner layer of the fabric is a flat surface formed by spandex, and there is a spandex extension line connecting the spandex loop columns in the air-permeable mesh. When the fabric is stretched, the spandex becomes thin and long in the weft direction. When the stretching disappears, the spandex returns to the original length and becomes short and thick. Due to the good stretch recovery of spandex, the fabric has good recovery. Under the stretching action of the spandex extension line, the two adjacent loop columns that form the air-permeable mesh are close to each other. After contacting water, the water can quickly spread between the adjacent yarn fibers, and the mesh fabric is light and thin, so that the water evaporates quickly on the surface of the fabric, achieving the effect of quick drying.

[0035] The warp direction of the fabric body is stretched by 150%, and then returns to the original length. The degree of rolling of the warp direction is tested. When the warp direction is slightly raised and the reverse side is not visible, the included angle between the plane and the flat table top is measured. At this time, the included angle is less than 90°, and the specific angle can be calculated. When the reverse side of the fabric is visible and the plane of the rolled fabric is perpendicular to the table top, the angle is 90°. When the warp direction edge is rolled up to the front of the fabric and is parallel to the table top, the angle is 180°. When the warp direction edge is rolled up and bent into a small circle towards the front, the angle is 270°. The rolling angle of the warp direction of the fabric after stretching and recovery is θ < 75°. It can be seen that the fabric has the characteristics of good warp direction random cutting effect and recovery.

[0036] The denier of the elastic yarn is less than the denier of the non-elastic yarn, and the ratio of the denier of the elastic yarn to the denier of the non-elastic yarn is 0.4-0.8. The difference between the deniers of the non-elastic yarn Y1 and the non-elastic yarn Y2 is less than or equal to 30D. The non-elastic yarn Y1 and the non-elastic yarn Y2 form the same size of air-permeable mesh, and the height of the air-permeable mesh in the longitudinal direction is less than or equal to 5 fabric loops, which ensures that the fabric is light and thin and firm, and meets the air-permeability requirement. By selecting the non-elastic yarn Y1 and the non-elastic yarn Y2 to be different in diameter, the water conductivity is improved.

[0037] In addition, the fabric body Y1 yarn is a long filament FDY yarn structure, the Y2 yarn is a long filament FDY yarn structure, the FDY full-drawing yarn is wound into a yarn with high orientation and moderate crystallinity by introducing a stretching action in the spinning process, and the FDY yarn is straight. In terms of mechanical properties, the strength and modulus of the full-drawing yarn are improved in the axial direction, and the elongation is reduced, so that the stretchability of the woven fabric and the fabric is stable during setting, and the fabric is not easy to roll.

[0038] In addition, the non-elastic yarn Y1 or the non-elastic yarn Y2 is a multi-fiber yarn, and the number of fibers of the multi-fiber yarn is greater than or equal to the denier; or the non-elastic yarn Y1 or the non-elastic yarn Y2 is a profiled yarn, and the cross section of the yarn is a cross section, a Y-shaped cross section, a C-shaped cross section or a wave-shaped cross section. By selecting different types of yarns, the fabric can be given more functionality.

[0039] The non-elastic yarn can be a superfine fiber or a profiled cross-section yarn. The number of fibers is large and the superfine fiber is fine in denier. The superfine fiber has a larger specific surface area than the conventional fiber, and the moisture absorption capacity is stronger than the conventional fiber. The number of fibers is large, and many fine gaps are generated between the fibers, thereby increasing the capillary effect of the fibers. When a large amount of liquid water contacts the fabric, the fabric absorbs the water into the interior of the fabric, thereby accelerating the moisture conductivity and diffusion rate. Then the water evaporates quickly on the surface of the fabric, thereby achieving the effect of quick drying. The profiled cross-section fiber has many grooves on the surface, and the grooves increase the specific surface area of the fiber. The larger the specific surface area, the larger the evaporation area of the water, and the faster the water evaporates.

[0040] In addition, the specific lapping number of each yarn can be in different ways, such as:

[0041] As shown in FIG. 2, the lapping number structure of the non-elastic yarn Y1 is 1-0 / 1-2 / 2-3 / 2-1 / / , the lapping number structure of the non-elastic yarn Y2 is 2-3 / 2-1 / 1-0 / 1-2 / / , and the lapping number structure of the elastic yarn Y3 is 1-0 / 1-2 / / .

[0042] Or as shown in Figure 3, the non-elastic yarn Y1 is 1-0 / 1-2 / 2-3 / 2-1 / / , the non-elastic yarn Y2 is 2-3 / 2-1 / 1-0 / 1-2 / / , and the elastic yarn Y3 is 1-2 / 1-0 / / .

[0043] Or as shown in Figure 4, the non-elastic yarn Y1 is 1-0 / 1-2 / 2-1 / 2-3 / 2-1 / 1-2 / / , the non-elastic yarn Y2 is 2-3 / 2-1 / 1-2 / 1-0 / 1-2 / 2-1 / / , and the elastic yarn Y3 is 1-0 / 1-2 / / .

[0044] Or as shown in Figure 5, the non-elastic yarn Y1 is 1-0 / 1-2 / 2-1 / 2-3 / 2-1 / 1-2 / / , the non-elastic yarn Y2 is 2-3 / 2-1 / 1-2 / 1-0 / 1-2 / 2-1 / / , and the elastic yarn Y3 is 1-2 / 1-0 / / .

[0045] The following is described with specific production examples.

[0046] 1. Yarn for warp knitting

[0047] 1) Beaming of filament

[0048] Beaming machine type: Karl Mayer DSDS21 / 30DNC, negative yarn feeding.

[0049] Beaming temperature: 23°C, beaming humidity: 65%

[0050] The workshop sets the process parameters under the above temperature and humidity conditions.

[0051] 2) Beaming of spandex

[0052] Beaming machine type: Karl Mayer DSE21 / 21EC, positive yarn feeding.

[0053] Beaming temperature: 23°C, beaming humidity: 65%

[0054] The workshop sets the process parameters under the above temperature and humidity conditions.

[0055] 2. Weaving

[0056] Weaving machine type: Karl Mayer HKS3-1, HKS4-1 or other single needle bed warp knitting machine

[0057] Machine gauge range: E28-E40

[0058] 3. Post-treatment process

[0059] Water washing (or dry cleaning) - pre-setting - overflow dyeing - dehydration - setting drying - post-setting.

[0060] Air volume refers to the volume of gas sucked or discharged by the fan per unit time, and is a very important parameter in the fan of the setting machine. The larger the air volume, the wider the coverage of hot air on the fabric surface, and it is easier to blow hot air evenly to the fabric surface, achieving better setting effect. If it is too small, the fabric surface will be unevenly heated, with local over-high or over-low, affecting the fabric effect, so the air volume should be selected according to the fabric type and gram weight. The fabric is light and elastic, and when pre-setting at high temperature 193℃-198℃, the up and down air volume of the air bellow should not be too large, and 60%-75% is appropriate; when post-setting at low temperature, 35%-45% is appropriate.

[0061] The good fast-drying property, recovery property and air permeability of the warp-knitted mesh fabric of the present application are further described in combination with Figs. 1-5 and Tables 1 and 2.

[0062] Example 1

[0063] Mainly referring to Fig. 2: Machine type: HKS4-1 EL E32 130 inches, used guide bars: GB1, GB2, GB3; GB1: 1-0 / 1-2 / 2-3 / 2-1 / / 1 fills 1 empty, non-elastic yarn Y1 is PA6 40D / 48F FD FDY, GB2: 2-3 / 2-1 / 1-0 / 1-2 / / 1 fills 1 empty, non-elastic yarn Y2 is PA6 40D / 48F FD FDY, GB3: 1-2 / 1-0 / / full filling, elastic yarn Y3 is Spandex 25D, finished product width: 152 cm, finished product gram weight: 120 gsm, spandex content: 19%, test evaporation rate according to GBT21655.1-2023: original sample 0.46 g / h, washed 5 times 0.46 g / h.

[0064] Example 2

[0065] Referring mainly to Fig. 2: Machine model: HKS4-1 EL E32 130 inches, used guide bars: GB1, GB2, GB3, GB1: 1-0 / 1-2 / 2-3 / 2-1 / / 1 pass 1 empty, non-elastic yarn Y1 is PA6 40D / 48F FD FDY, GB2: 2-3 / 2-1 / 1-0 / 1-2 / / 1 pass 1 empty, non-elastic yarn Y2 is PA6 40D / 48F FD FDY, GB3: 1-2 / 1-0 / / full pass, elastic yarn Y3 is Spandex 40D, finished product width: 152 cm, finished product weight: 135 gsm, spandex content: 25%, GBT21655.1-2023 test evaporation rate: original 0.51 g / h, 5 times washing 0.47 g / h. The three guide bars in Example 2 have the same padding number as Example 1, but the denier of the yarn used by guide bar GB3 and the finished product weight are different.

[0066] Comparative Example 1: Machine model: HKS4-1 EL E32 130 inches, used guide bars: GB1, GB2, GB3, GB4, GB1: 1-0 / 1-2 / 2-3 / 2-1 / / 1 pass 1 empty, PA6 40D / 34F FD FDY, GB2: 2-3 / 2-1 / 1-0 / 1-2 / / 1 pass 1 empty, PA6 40D / 34F FD FDY, GB3: 1-0 / 1-2 / 2-3 / 2-1 / / 1 pass 1 empty, Spandex 30D, GB4: 2-3 / 2-1 / 1-0 / 1-2 / / 1 pass 1 empty, Spandex 30D, finished product width: 160 cm, finished product weight: 125 gsm, spandex content: 21%, GBT21655.1-2023 test evaporation rate: original 0.33 g / h, 5 times washing 0.41 g / h.

[0067] Note that the post-processing auxiliary agent slurry of the above Example 1, Example 2, and Comparative Example 1 is the same.

[0068] Recovery test: M&S P14A test method, recovery rate comparison as follows Table 1

[0069] As can be seen from Table 1, under the condition that the spandex thickness is close, the fabric of the present application has better weft recovery than the traditional warp sate net fabric (structure of Comparative Example 1).

[0070] Air permeability test: JIS L 1096A method test method, Example 1 product and Example 2 product are widened in weft direction, and the density change before and after stretching and the air permeability value change are observed, and the data values are recorded as follows Table 2

[0071] Note: since the spandex straight length is small, the spandex fineness change is ignored during the stretching process, that is, the S value before and after the stretching change is calculated, and the spandex fineness remains unchanged.

[0072] In the formula: S is the area of the air permeable aperture, unit mm 2 ;

[0073] WPC is the weft density, unit cm;

[0074] CPC is the warp density, unit cm;

[0075] q is the warping draft ratio;

[0076] D is the spandex denier;

[0077] n is the number of elastic yarn Y3 extension line segments existing in an air permeable mesh. According to Table 1, Figure 1 can be summarized that the air permeability value and the air permeable aperture area exist the following relationship, y = 67524x 2 -69819x + 18175, R2 = 0.9977, wherein y is the air permeability value, and x is the air permeable aperture area.

[0078] The larger the aperture, the better the air permeability, but the stretching will be poor. Therefore, when designing the mesh fabric, the air permeability and the stretching performance should be considered comprehensively, and through the above formula, the warp density and the weft density can be reasonably designed to achieve a certain air permeability value, while ensuring that the warp tension and the weft tension are within a suitable range.

[0079] It can be seen from the above test data that the warp-knitted mesh fabric of the present application has more superior performance and improves comfort.

[0080] It should be noted that the above is only a preferred embodiment of the present application and does not limit the present application, although the present application is described in detail with reference to the embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified or some technical features can be replaced, but any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A warp-knitted mesh fabric comprising a fabric body, characterized in that, The fabric body is woven by at least two different yarns, including elastic yarn Y3 and non-elastic yarn, wherein the non-elastic yarn includes non-elastic yarn Y1 and non-elastic yarn Y2, the non-elastic yarn Y1 and the non-elastic yarn Y2 are woven on the front guide bar in a 1-in-1-out threading mode, and the total number of needles in one cycle structure is 3 needles, the non-elastic yarn Y1 and the non-elastic yarn Y2 are woven with the needle back transverse movement each time, the directions of the needle back transverse movement are opposite, and a symmetric mesh structure composed of a plurality of breathable meshes is formed; the elastic yarn Y3 is woven on the back guide bar in a full-threading threading mode to form a flat surface on the inner layer of the fabric body, the elastic yarn Y3 is woven to form an extension line, and the extension line passes through the breathable mesh, and the size of the breathable mesh is calculated and set according to the following formula: wherein: S is the area of the gas permeable aperture in mm2 2 ; WPC is the weft density, unit cm; CPC is the warp density, unit cm; q is the warp-drawing ratio; D is the denier of spandex; n is the number of segments of the extended thread of the elastic yarn Y3 in one air-permeable mesh.

2. The warp knit fabric of claim 1, wherein, The fabric body comprises non-elastic loops and elastic loops, the non-elastic loops comprise Y1 loops knitted by non-elastic yarn Y1 and Y2 loops knitted by non-elastic yarn Y2, and the elastic loops are knitted by elastic yarn Y3, the non-elastic yarn Y2 and the non-elastic yarn Y1 span the same number of stitches and are knitted into loops in opposite or relative directions, and the tail ends of the elastic loops are adhered together to form a closed loop structure.

3. The warp knit fabric of claim 1, wherein, The denier of the elastic yarn is less than the denier of the non-elastic yarn, and the ratio of the denier of the elastic yarn to the denier of the non-elastic yarn is 0.4-0.

8.

4. The warp knit fabric of claim 1, wherein, The difference between the deniers of the non-elastic yarn Y1 and the non-elastic yarn Y2 is less than or equal to 30D.

5. The warp knit fabric of claim 1, wherein, The non-elastic yarn Y1 and the non-elastic yarn Y2 form the same size of air-permeable mesh, and the longitudinal span height of the air-permeable mesh is less than or equal to 5 fabric loops.

6. The warp knit fabric of claim 1, wherein, The non-elastic yarn Y1 has a structure of 1-0 / 1-2 / 2-3 / 2-1 / / , the non-elastic yarn Y2 has a structure of 2-3 / 2-1 / 1-0 / 1-2 / / , and the elastic yarn Y3 has a structure of 1-0 / 1-2 / / . Or the non-elastic yarn Y1 has a structure of 1-0 / 1-2 / 2-3 / 2-1 / / , the non-elastic yarn Y2 has a structure of 2-3 / 2-1 / 1-0 / 1-2 / / , and the elastic yarn Y3 has a structure of 1-2 / 1-0 / / .

7. The warp knit fabric of claim 1, wherein, The non-elastic yarn Y1 has a structure of 1-0 / 1-2 / 2-1 / 2-3 / 2-1 / 1-2 / / , the non-elastic yarn Y2 has a structure of 2-3 / 2-1 / 1-2 / 1-0 / 1-2 / 2-1 / / , and the elastic yarn Y3 has a structure of 1-0 / 1-2 / / . Or the non-elastic yarn Y1 has a structure of 1-0 / 1-2 / 2-1 / 2-3 / 2-1 / 1-2 / / , the non-elastic yarn Y2 has a structure of 2-3 / 2-1 / 1-2 / 1-0 / 1-2 / 2-1 / / , and the elastic yarn Y3 has a structure of 1-2 / 1-0 / / .

8. The warp-knitted mesh fabric according to claim 6 or 7, characterized in that The fabric body has one or more combinations of full open loops, full closed loops and open-closed loops in the knitting of each guide bar.

9. The warp knit fabric of claim 1, wherein, The longitudinal density of the fabric body is between 76 and 140 per inch, preferably the longitudinal density of the fabric body is between 45 and 74 per inch.

10. The warp knit fabric of claim 1, wherein, The non-elastic yarn Y1 has a structure of long filament FDY yarn, and the non-elastic yarn Y2 has a structure of long filament FDY yarn. Or the non-elastic yarn Y1 or the non-elastic yarn Y2 is a multi-fiber yarn, and the number of fibers of the multi-fiber yarn is greater than or equal to the denier. Or the non-elastic yarn Y1 or the non-elastic yarn Y2 is a profiled yarn, and the cross section of the yarn is a cross section, a Y-shaped cross section, a C-shaped cross section or a wave-shaped cross section.

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