阅读说明：本技术 一种双层经编运动背心及其制备工艺 (Double-layer warp-knitted sport vest and preparation process thereof ) 是由 王敏其 王菡珠 钱雪凤 王天 孙宁宁 杨静芳 曹红梅 于 2021-07-13 设计创作，主要内容包括：本发明公开一种双层经编运动背心,该背心是由双针床贾卡经编机织造出成型背心面料后,将前、后片对折并进行侧边缝合后制成；背心有表层和里层两层结构,胸部位置处的表、里两层不粘合,胸部以外的其余部位的表里两层的组织相同,并通过粘合组织粘合成一片,具体是采用贾卡密实组织、网孔组织、稀薄组织和粘合组织的组合搭配完成织造,花型立体富有层次感,由于胸部表里两层分层,其他部位表里两层粘合,这样设计既能保证隐私性,更能增加内衣的塑形性,无需另设人工进行表里两层的缝合工作,可降低人工投入成本,具有较好的经济效益。(The invention discloses a double-layer warp knitting sport vest, which is made by folding a front piece and a back piece and sewing the side edges after a forming vest fabric is woven by a double-needle bed jacquard warp knitting machine; the undershirt has the two-layer structure in top layer and the inlayer, the surface of chest position department, two-layer not bonding in the inside, the two-layer tissue in the surface of all the other positions outside the chest is the same, and bond into a slice through bonding tissue, adopt the combination collocation completion of jacquard solid tissue, mesh tissue, thin tissue and bonding tissue to weave specifically, the flower type is three-dimensional is rich in the stereovision, because two-layer layering in the chest surface, two-layer bonding in other positions surface, the design can guarantee privacy nature like this, more can increase the moulding nature of underwear, need not to establish in addition that the manual work carries out two-layer sewing work in the surface, can reduce the artifical input cost, better economic benefits has.)

1. A double-layer warp knitting sport vest is characterized in that the vest is made by folding a front piece and a back piece and sewing the side edges after a forming vest fabric is woven by a double-needle-bed jacquard warp knitting machine;

the vest has a surface layer structure and an inner layer structure, the surface layer and the two inner layers at the chest position are not bonded, and the tissues of the surface layer and the inner layer at the other parts except the chest position are the same and are bonded into a piece through the bonded tissues;

the chest positions comprise a surface layer lower chest position, a surface layer upper chest position and an inner layer chest position;

the chest position under the surface layer is a flower type pattern formed by interweaving dense tissues and thin tissues;

the chest position on the surface layer uses dense tissue, mesh tissue and thin tissue to weave a flower type hollowed pattern;

the inner layer breast position adopts mesh tissue and thin tissue to weave alternately.

2. The double-layered warp-knitted sport vest of claim 1, wherein hollowed-out patterns are alternately knitted with a thin weave, a mesh weave and an adhesive weave at positions below the shoulder position of the front part and excluding the chest.

3. The double-layered warp-knitted sport vest of claim 1, wherein a 5cm long grid of hole tissue is used as the cut marking line above the inner layer chest position, a ring of three-grid dense tissue is added around the cut marking line, and a chest pad can be placed in the interlayer between the surface layer chest position and the inner layer chest position after the marking line is cut.

4. The double-layer warp-knitted sport vest of claim 1, wherein the side position of the back piece is encrypted by adopting dense tissue, thin tissue and adhesive tissue without hollow priming design; the middle position of the back piece adopts hollow bottoming, dense tissues form a flower type outline, the inside of the flower type adopts thin tissues and mesh tissues to interweave to enable the flower type to have layers, and the hollow bottoming adopts the mesh tissues and bonding tissues to alternately weave.

5. The double-layered warp-knitted sport vest of claim 1, wherein the overall contoured periphery of the vest is cut out of mesh tissue.

6. The double-layer warp-knitted sport vest of claim 1, wherein the side seams joining the front and back panels are located on the back.

7. The double-layer warp-knitted sport vest of claim 1, wherein said vest contour and said neck opening edge are knitted with a soft tissue and a layer of adhesive tissue is applied to said contour and said neck opening soft tissue edge.

8. A process for manufacturing a double warp knitted sport vest according to any one of claims 1 to 7, using a double needle bar warp knitting machine on which are arranged, in the counterclockwise direction, the ground bar GB2, the Jacquard bars JB3.1, JB3.2 of the front needle bar and the Jacquard bars JB4.1, JB4.2, the ground bar GB5, JB3.1 and JB3.2, which are located on the rear needle bar, which together form a first split Jacquard bar, JB4.1 and JB4.2, which together form a second split Jacquard bar,

the specific knitting scheme is as follows:

(1) warping parameters: GB2 and GB5 adopt 40D high-elastic chinlon, JB3.1, JB3.2, JB4.1 and JB4.2 adopt 4040 spandex coated yarns;

(2) the threading mode: the yarns are threaded in a full-threading manner in GB2 and GB5, and threaded in a 1-threading and 1-emptying manner in JB3.1, JB3.2, JB4.1 and JB 4.2;

(3) GB2 and GB5 weave chain stitch, JB3.1, JB3.2, JB4.1 and JB4.2 do yarn laying movement on the chain stitch according to a jacquard signal;

(4) the weaving process of the cloth cover tissue comprises the following steps:

the jacquard guide bars JB3.1, JB3.2, JB4.1 and JB4.2 are controlled by jacquard red signal points to shift guide needles on even-numbered courses of the dense tissue, so that the jacquard guide needles carry out 1-0/2-3// movement knitting three-needle warp leveling, the shift signal for knitting the dense tissue by the front needle bed is HHHHHHTTHH, and the shift signal for knitting the dense tissue by the rear needle bed is HHHHTT;

the thin structure is characterized in that guide needles on jacquard guide bars JB3.1, JB3.2, JB4.1 and JB4.2 are controlled by a jacquard green signal point to carry out basic yarn laying 1-0/1-2// movement knitting two needles to carry out warp leveling, an offset signal for knitting a thin structure on a front needle bed is HHHHHHHHHHHH, and an offset signal for knitting the thin structure on a rear needle bed is HHHHHH;

the mesh weave controls the yarn guide needles on jacquard guide bars JB3.1, JB3.2, JB4.1 and JB4.2 to shift in odd-numbered courses by a jacquard white signal point, so that the jacquard yarn guide needles perform 2-1/1-2// movement knitting chaining, the shift signal of the front needle bed knitting mesh weave is TTHHHHHH, and the shift signal of the back needle bed knitting is HHTTHH;

the bonded structure is formed by looping guide needles on jacquard guide bars JB3.1, JB3.2, JB4.1 and JB4.2 on front and back needle beds under the control of jacquard yellow signal points, the offset information of the front needle bed knitting bonded structure is HHHHHHHHHHHH, and the offset information of the back needle bed is HTHHHHHHHHHHHH.

9. The process for preparing a double-layer warp-knitted sport vest according to claim 8, wherein in step (2), the let-off amounts of GB2 and GB5 are 1240mm/rack, and the let-off amounts of JB3.1, JB3.2, JB4.1 and JB4.2 are 2150 mm/rack.

Technical Field

The invention belongs to the technical field of textile warp knitting manufacturing, and particularly relates to a double-layer warp knitting sport vest and a preparation process thereof.

Background

In the field of weaving and manufacturing, a circular weft knitting machine, a flat knitting machine and a warp knitting machine are all devices which are commonly used for forming and weaving, wherein the circular weft knitting machine can only carry out single-tube weaving, the flat knitting machine can finish single-piece multi-tube forming and weaving work, the warp knitting machine can realize multi-tube multi-piece forming and weaving, the production efficiency is highest, so that the warp knitting machine is more and more widely applied in the field, and related processes are gradually improved.

For example, the warp knitting process based on the double-jacquard double-needle-bed warp knitting machine disclosed in chinese patent CN 110791874 a can achieve an excellent diffraction gradual change effect, and can obtain effects of single color, double color, color mixture and the like in meshes by combining changes of the guide bars, and perform a shift action by the first separated jacquard bar and the second separated jacquard bar to exchange knitting positions with each other, so that the tissues of the surface layer and the bottom layer are exchanged with each other, and a warp knitting cloth capable of being used on both sides can be obtained. However, although the sports underwear formed by warp knitting in one step by adopting the process can effectively improve the design and the two-side usability, the sports underwear made by weaving a single-layer fabric or a double-layer fabric still has certain defects in the using process. For example, although underwear made of a single-layer fabric is close-fitting and comfortable, the skin is easy to penetrate, the privacy is difficult to guarantee, the shaping performance of the fabric is relatively small, and the underwear needs to be worn to fix the chest during sports, so that the effect of the sports underwear is lost, the use is cumbersome, and users usually cannot select the product; although the privacy nature of the sports underwear of double-deck surface fabric is better, the problem such as clothing material epilogue can appear in the motion in the structure of two-deck surface fabric layering, often need to carry out the manual work in addition to make fixedly in order to promote moulding effect, has not only increaseed the cost of labor from this, also can reduce the gas permeability of clothing to a certain extent simultaneously.

Disclosure of Invention

In order to solve the problems, the invention designs and weaves a double-layer warp-knitted sports vest and discloses a preparation process thereof, the vest fabric is formed and weaved, the front and rear pieces are folded and then sewn to finish the preparation, the whole garment piece is of a double-layer fabric structure, the surface and inner fabric layers at the chest position are layered so as to add an inner liner, the surface and inner fabric layers at other positions except the chest are bonded into a whole, the edge curling is not easy to happen, and the double-layer warp-knitted sports vest has good shaping performance.

The technical scheme disclosed by the invention is as follows: a double-layer warp knitting sport vest is made by folding the front and back pieces and sewing the side edges after the forming vest fabric is woven by a double-needle bar jacquard warp knitting machine;

the vest has a surface layer structure and an inner layer structure, the surface layer and the two inner layers at the chest position are not bonded, and the tissues of the surface layer and the inner layer at the other parts except the chest position are the same and are bonded into a piece through the bonded tissues;

the chest position is divided into a chest position under the surface layer, a chest position on the surface layer and a chest position in the inner layer;

the lower chest position of the surface layer is a flower pattern formed by interweaving dense tissues and thin tissues;

the chest position on the surface layer uses dense tissue, mesh tissue and thin tissue to weave a flower type hollowed pattern;

the inner layer breast position adopts mesh tissue and thin tissue to weave alternately.

Further, the hollowed-out patterns are alternately woven by adopting thin tissues, mesh tissues and bonding tissues below the shoulder positions of the front piece and at positions except the chest.

Furthermore, a grid hole tissue with the length of 5cm is used as a cutting mark line above the position of the chest at the inner layer, a circle of dense tissue with three grids is added around the cutting mark line, and the chest pad can be placed in an interlayer between the position of the chest at the lower surface layer and the position of the chest at the inner layer after the mark line is cut.

Furthermore, the side position of the back sheet adopts a dense tissue, a thin tissue and an adhesive tissue for encryption treatment, and a hollow bottoming design is not adopted; the middle position of the back piece adopts hollow bottoming, dense tissues form a flower type outline, the inside of the flower type adopts thin tissues and mesh tissues to interweave to enable the flower type to have layers, and the hollow bottoming adopts the mesh tissues and bonding tissues to alternately weave.

Furthermore, the outer edge of the overall outline of the vest is weaved with cutting lines by mesh tissues.

Further, the spliced side seams of the front and back panels are located on the back.

Furthermore, the vest outline and the neckline edge are woven by thin tissues, and a layer of bonding tissues is added on the outline and the neckline edge of the thin tissues.

The preparation process of the double-layer warp-knitted sport vest comprises the following steps:

the ground guide bar GB2, the jacquard guide bars JB3.1 and JB3.2 of the front needle bed and the jacquard guide bars JB4.1, JB4.2 and the ground guide bar GB5, JB3.1 and JB3.2 which are positioned at the back needle bed form a first separated jacquard comb together, and JB4.1 and JB4.2 form a second separated jacquard comb together on the double-needle bed warp knitting machine used for preparation,

the specific weaving scheme is as follows:

(1) warping parameters: GB2 and GB5 adopt 40D high-elastic chinlon, JB3.1, JB3.2, JB4.1 and JB4.2 adopt 4040 spandex coated yarns;

(2) the threading mode: the yarns are threaded in a full-threading manner in GB2 and GB5, and threaded in a 1-threading and 1-emptying manner in JB3.1, JB3.2, JB4.1 and JB 4.2;

(3) GB2 and GB5 weave chain stitch, JB3.1, JB3.2, JB4.1 and JB4.2 do yarn laying movement on the chain stitch according to a jacquard signal;

(4) the weaving process of the cloth cover tissue comprises the following steps:

the jacquard guide bars JB3.1, JB3.2, JB4.1 and JB4.2 are controlled by jacquard red signal points to shift guide needles on even-numbered courses of the dense tissue, so that the jacquard guide needles carry out 1-0/2-3// movement knitting three-needle warp leveling, the shift signal for knitting the dense tissue by the front needle bed is HHHHHHTTHH, and the shift signal for knitting the dense tissue by the rear needle bed is HHHHTT;

the thin structure is characterized in that guide needles on jacquard guide bars JB3.1, JB3.2, JB4.1 and JB4.2 are controlled by a jacquard green signal point to carry out basic yarn laying 1-0/1-2// movement knitting two needles to carry out warp leveling, an offset signal for knitting a thin structure on a front needle bed is HHHHHHHHHHHH, and an offset signal for knitting the thin structure on a rear needle bed is HHHHHH;

the mesh weave controls the yarn guide needles on jacquard guide bars JB3.1, JB3.2, JB4.1 and JB4.2 to shift in odd-numbered courses by a jacquard white signal point, so that the jacquard yarn guide needles perform 2-1/1-2// movement knitting chaining, the shift signal of the front needle bed knitting mesh weave is TTHHHHHH, and the shift signal of the back needle bed knitting is HHTTHH;

the bonded structure is formed by looping guide needles on jacquard guide bars JB3.1, JB3.2, JB4.1 and JB4.2 on front and back needle beds under the control of jacquard yellow signal points, the offset information of the front needle bed knitting bonded structure is HHHHHHHHHHHH, and the offset information of the back needle bed is HTHHHHHHHHHHHH.

Furthermore, in the step (2), the let-off amounts of GB2 and GB5 are 1240mm/rack, and the let-off amounts of JB3.1, JB3.2, JB4.1 and JB4.2 are 2150 mm/rack.

Compared with the prior art, the invention has the following advantages:

1. the double-layer warp-knitted sports underwear has a specific double-layer structure, weaving is completed by using a double-needle-bed jacquard warp-knitting machine through combination and matching of jacquard solid tissues, mesh tissues, thin tissues and bonding tissues, the pattern is three-dimensional and rich in layering, the front layer and the back layer of a chest are layered in the weaving process, and the front layer and the back layer of other parts are bonded, so that the shaping performance of the underwear is improved due to the two-layer bonded structure, the front layer and the back layer cannot be staggered and stacked in the motion process to influence the shaping effect, and edge curling after cutting can be prevented;

2. because the surface layer and the inner layer of the chest are layered, the inner lining can be directly added after the inner layer fabric of the chest is cut from the cutting line after the machine is off, so that a user does not need to additionally wear underwear during exercise, and the use convenience is effectively improved;

3. the double-layer warp-knitted sport vest disclosed by the application is a formed and woven fabric, and can be prepared only by sewing the side seam position after the front and back pieces are folded in half, so that the labor consumption is low, the labor production cost is saved, and the preparation efficiency is high;

4. the positions of the front and rear pieces which are folded and then connected and sewn are positioned on the back, so that the aesthetic degree is greatly improved, and the waistcoat can be prevented from moving upwards in the movement process by adopting the tightening design of the lower hem, so that the comfort of the waistcoat in the movement process is improved;

5. the shoulder position of the double-layer warp knitting sport vest disclosed by the application adopts the design of non-mesh tissue, the lifting force is increased, the gliding of the shoulder strap in the sport can be prevented, the shoulder position is designed in a seamless manner, the shoulder of a user cannot bear large friction in the sport process, and the comfort in use is obviously improved.

Drawings

Fig. 1 is a schematic diagram of the surface layer structure and the inner layer structure of the double-layer warp-knitted sport vest prepared in the first embodiment, wherein a is a schematic diagram of the surface layer structure, and b is a schematic diagram of the inner layer structure;

fig. 2 is a schematic diagram of the double-layer warp-knitted sport vest shown in fig. 1, wherein a is a schematic diagram of the surface layer structure, and b is a schematic diagram of the inner layer structure;

wherein, 1-the position of the chest under the surface layer, 2-the position of the chest on the surface layer, 3-the position of the chest on the inner layer, 4-a cutting mark line, 5-the position of the shoulder, 6-the middle position of the back piece and 7-the position of the side edge of the back piece;

FIG. 3 is a schematic view of the outer side of the double-layered warp knitted sport vest according to the first embodiment, wherein a is a schematic view of the front side of the vest and b is a schematic view of the rear side of the vest;

FIG. 4 is a schematic view of the inner side of the double-layered warp knitted sport vest manufactured according to the first embodiment, wherein a is a schematic view of the front side of the inner side, and b is a schematic view of the rear side of the inner side;

FIG. 5A is a schematic representation of the basic weave pattern (open weave) knitted by the front needle bed Jacquard bar, i.e., the two needle warp flat;

FIG. 5B is a schematic representation of the basic weave pattern (open weave) knitted by the back needle bar Jacquard bar, i.e., the two needle warp flat;

FIG. 6A is a schematic representation of the front needle bed Jacquard bar re-knitting an even course based on the basic weave of the knit as if left offset one stitch knitting, i.e., three stitch warp flat (solid) stitch;

FIG. 6B is a schematic representation of the back needle bed Jacquard bar re-knitting an even course based on the basic weave of the knit as if right offset one stitch, i.e., three stitch warp flat (solid) knit;

FIG. 7A is a schematic representation of the front and back panel connections achieved by the Jacquard needles of JB3.1, JB3.2 of the front needle bed Jacquard bar, i.e., the bond pattern;

FIG. 7B is a schematic illustration of the Jacquard needles of the back needle bar Jacquard needles JB3.1, JB3.2 effecting the joining of the front and back panels, i.e. the bonding pattern;

FIG. 8A is a schematic representation of the front needle bed Jacquard bar re-knitting odd courses on the basis of the basic weave pattern being knitted as if left offset one stitch, i.e., mesh;

FIG. 8B is a schematic representation of the front needle bed Jacquard bar re-knitting odd courses as right offset knit, i.e., mesh, based on the basic weave being knitted.

Detailed Description

The technical solution of the present invention is further described below with reference to the accompanying drawings, but not limited thereto, and any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention shall be covered by the protection scope of the present invention.

EXAMPLE one preparation of a double layer warp knit sports vest

The sports vest is woven by a double-needle-bed jacquard warp knitting machine with the model of GE2396/RDPJ6/2, the machine number of E24 and the machine width of 90 inches, four guide bars are provided, a ground guide bar GB2, jacquard guide bars JB3.1 and JB3.2 of a front needle bed and jacquard guide bars JB4.1, JB4.2 and a ground guide bar GB5, JB3.1 and JB3.2 positioned on a back needle bed form a first separated jacquard comb in turn on the double-needle-bed warp knitting machine, and JB4.1 and JB4.2 form a second separated jacquard comb.

When the double-layer warp-knitted sport vest is prepared, 4040 spandex-coated yarns and 40D high-elastic chinlon are adopted as raw materials of the fabric;

the specific weaving scheme is as follows:

(1) warping parameters: GB2 and GB5 adopt 2100 high-elastic chinlon of 40D respectively, JB3.1, JB3.2, JB4.1 and JB4.2 adopt 2100 4040 spandex coated yarns respectively;

(2) the threading mode: GB2, GB5 are threaded in a full-penetration mode, and the warp feeding quantity is 1240mm/rack as a chaining structure of the fabric; threading JB3.1, JB3.2, JB4.1, and JB4.2 in a way of threading 1 through 1 space, and the let-off amount is 2150 mm/rack;

(3) GB2 and GB5 adopt a knitting chain structure, and JB3.1, JB3.2, JB4.1 and JB4.2 perform yarn laying motion on the knitting chain structure according to a jacquard signal.

(4) The weaving process of the cloth surface structure is as follows (wherein, T is used as an offset signal of the first separation type jacquard comb and the second separation type jacquard comb, and H is used as a non-offset signal of the first separation type jacquard comb and the second separation type jacquard comb).

The jacquard guide bars JB3.1, JB3.2, JB4.1 and JB4.2 are controlled by jacquard red signal points to shift guide needles on even-numbered courses of the dense tissue, so that the jacquard guide needles carry out 1-0/2-3// movement knitting three-needle warp leveling, the shift signal for knitting the dense tissue by the front needle bed is HHHHHHTTHH, and the shift signal for knitting the dense tissue by the rear needle bed is HHHHTT; fig. 6A and 6B are lapping movement diagrams of a front needle bed and a back needle bed with a dense tissue, wherein the dense tissue is a common warp knitting three-needle flat tissue, the three-needle flat tissue forms a thickened tissue by using a jacquard offset technology, and the thickened tissue is knitted by the three-needle flat tissue to enable the clear outline and the clear pattern level.

The thin structure is formed by controlling guide needles on jacquard guide bars JB3.1, JB3.2, JB4.1 and JB4.2 to carry out basic yarn laying 1-0/1-2// motion knitting two needle warp flat, the offset signal of the front needle bed knitting thin structure is HHHHHHHHHH, the offset signal of the back needle bed knitting thin structure is HHHHHHHHHHHHHHHHHHHH, and FIGS. 5A and 5B are yarn laying motion diagrams of the thin structure on the front needle bed and the back needle bed, the jacquard needles do not offset, and the structure is used as a basic bottoming structure and is light, thin and breathable.

The mesh weave is controlled by a jacquard white signal point to lead guide needles on jacquard guide bars JB3.1, JB3.2, JB4.1 and JB4.2 to shift in odd courses, so that the jacquard guide needles carry out 2-1/1-2// motion to weave a chaining, the shift signal of the front needle bed weaving mesh weave is TTHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH, the shift signal of the back needle bed weaving is HHTTHHHHHH, and figures 8A and 8B are lapping motion diagrams of the mesh weave on the front needle bed and the back needle bed, the weave is an air-permeable mesh, mesh hollows are formed on a cloth surface, and are mutually combined with dense weave and thin weave to form a pattern with obvious stereoscopic impression, and the jacquard weave can also be used as a cutting line mark line.

The bonding texture is formed by controlling guide needles on jacquard guide bars JB3.1, JB3.2, JB4.1 and JB4.2 to loop on front and back needle beds by jacquard yellow signal points, the offset information of the bonding texture knitted by the front needle bed is HHHHHHHHHHHHHHHHHHHHHHHH, the offset information of the back needle bed is HTHHHHHHHHHHHHHHHHHHHH, and figures 7A and 7B are lapping motion diagrams of the bonding texture on the front and back needle beds, the texture is used as a connecting texture of the front layer and the back layer to form connection around meshes, so that the front layer and the back layer of fabrics are bonded to form a thick fabric, the completeness and the beauty of the pattern are ensured, and the effect of connecting the front layer and the back layer is also achieved.

The vest disclosed in this embodiment is one-piece type shaping woven structure, cuts out unnecessary part according to the mesh and tailors the mark line, and the structure is as shown in figure 1, and during the sewing shaping, the upper and lower part fifty percent discount of surface fabric, upper portion are the back part, and the lower part is the anter, and both sides limit is made into the ready-made clothe after carrying out artifical sewing up, and compared with conventional vest, the shoulder of the two-sided vest disclosed in this application does not have the seam mark, and is more comfortable during the motion.

The cloth cover of this undershirt can be designed according to actual demand, and the table, nexine are not sewed up completely, in order can not wear the underwear when the motion, alleviate the breast vibrations when motion and run, can keep the chest type again, do not oppress the chest, can additionally add the inside lining at the chest, consequently the chest position designs into the form that does not adhere, cuts out the line in nexine design, cuts out when needing and add the inside lining can.

The cloth cover tissue of the sports vest is woven by dense tissue, mesh tissue, thin tissue and bonding tissue according to the design requirements, and the sports vest has the advantages that the woven double-layer fabric has the variability of the design of warp-knitted fabric patterns, the number of needles of the front and rear sheets is the same, the patterns of the two surfaces are the same, and different patterns can be set according to requirements.

Specifically, referring to fig. 2, in fig. 2, the regions on the front and back layers of the vest are shown in a divided manner so as to better correspond to the technical features, the vest is divided into a front piece and a back piece and has a structure with two layers, namely a surface layer and an inner layer, and the tissues of the corresponding positions of the rest parts are the same except that the front and inner layers at the chest position are not bonded, and are bonded into one piece by using the bonded tissues;

the chest part is provided with an independent two-layer structure which comprises a chest position 1 under the surface layer, a chest position 2 on the surface layer and a chest position 3 in the inner layer; the chest position 1 under the surface layer is a flower-shaped pattern woven by dense tissue and thin tissue, and mesh tissue and adhesive tissue are not arranged, so that private parts are protected; the air permeability is increased by using a flower-shaped hollow pattern which is alternately woven by dense tissue, mesh tissue and thin tissue at the upper chest position 2 of the surface layer on the surface layer structure and above the lower chest position 1 of the surface layer; the inner layer chest position 3 is alternately woven by adopting mesh tissues and thin tissues, so that the hand feeling is soft and the air permeability is good; the hollow pattern is formed by adopting a weaving design scheme of interweaving thin tissues, mesh tissues and bonding tissues at the position below the shoulder position 5 of the front piece except the chest;

a grid hole structure with the length of 5cm is used as a cutting mark line 4 above the inner layer chest position 3, a circle of three-grid dense structure is added around the cutting mark line 4 to enhance the fastness, the mark line is prevented from being taken off after being cut, and a breast pad can be placed in an interlayer between the surface layer lower chest position 1 and the inner layer chest position 3 after the mark line is cut.

The shoulder position 5 adopts a mesh-free tissue design, namely a scheme of interweaving and weaving dense tissue, thin tissue and adhesive tissue is adopted, so that the lifting force is increased, and the shoulder belt is prevented from sliding downwards in movement.

The side position 7 of the back piece adopts dense tissue, thin tissue and bonding tissue for encryption treatment, and a hollow bottoming design is not adopted, so that the tightening pressure of the back is improved, and the clothes are fixed to prevent moving upwards in movement; the middle position 6 of the back piece adopts hollow bottoming, dense tissues form a flower type outline, thin tissues and mesh tissues are adopted inside the flower type to be interwoven, so that the flower type is rich in layering, and the hollow bottoming adopts the alternate weaving of the mesh tissues and bonding tissues;

the outer side of the whole outline of the vest is made of mesh tissue as a cutting line, the vest shape is cut along the cutting line after the vest is taken off, and then the two sides of the vest are sewn and spliced by post-treatment.

The side seam splicing part is positioned on the back, the appearance is attractive, the lower hem is designed to be tightened, and the clothes are prevented from moving upwards in motion

The vest outline and the neckline edge are woven by thin tissues, so that the cloth cover is smooth, the warp-knitted single-layer fabric is high in elasticity, the edge is easy to curl after being stretched, and a layer of bonding tissues is added at the outline and the neckline thin tissue edge, so that the edge of the surface layer and the inner layer is sewn, and the edge of the garment is prevented from curling.

The double-layer warp-knitted sports underwear prepared by the embodiment has a specific double-layer structure, and is three-dimensionally rich in layering effect due to the fact that the jacquard solid tissue, the mesh tissue, the thin tissue and the bonding tissue are combined and matched, the outer layer and the inner layer of the chest are layered in the knitting process, and the outer layer and the inner layer of other parts are bonded, so that the shaping performance of the underwear is improved, and meanwhile edge curling after cutting is prevented; the inner lining can be directly added after the inner lining of the lower chest is cut from the cutting line, and the underwear does not need to be worn during exercise, so that the production efficiency is high.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.