Warp-knitted symmetric geometric jacquard elastic bubble velvet fabric and production process

Abstract

The invention discloses a warp-knitted symmetric geometric jacquard elastic bubble velvet fabric and a production process thereof, and belongs to the field of spinning. According to the production process of the warp-knitted symmetrical geometric jacquard elastic bubble velvet fabric, on the basis of the knitting principle of the warp-knitted velvet fabric and the good resilience of spandex, the surface of the fabric generates different shrinkage by reasonably designing the organizational structure and the empty penetration rule of the spandex comb, and integral forming of the bubble wrinkle fabric and the elastic base cloth is achieved structurally. When the structure is woven, the bubble wrinkles are endowed with a stable spatial form, so that the bubble wrinkles can resist external stress in the after-finishing and using process, and the durability and the shape stability of the bubble structure after washing are remarkably improved; in the weaving process of the process, forming of the elastic base cloth, the upright suede and the three-dimensional blister wrinkles is completed in one step; the process is simple, and energy consumption and cost are low.

Description

Technical Field

[0001] This invention relates to a warp-knitted symmetrical geometric jacquard elastic bubble fleece fabric and its production process, belonging to the textile field. Background Technology

[0002] Warp-knitted stretch fleece fabrics are an important category in the textile industry, combining comfort, functionality, and aesthetics. With their soft, skin-friendly feel, excellent stretch and resilience, and high-efficiency warmth retention, they are widely used in thermal underwear, loungewear, home textiles, and high-end decorative fabrics, becoming one of the mainstream products in the knitted fabric market in recent years. As consumer demand upgrades, the market is placing higher demands on the three-dimensional appearance, shape stability, elasticity, comfort, and production economy of fleece fabrics, driving the development of warp-knitted stretch fleece fabrics towards three-dimensional textures, long-lasting stability, and simplified manufacturing processes.

[0003] Current conventional warp-knitted elastic fleece fabric production processes mostly use single-needle bed or double-needle bed warp knitting machines as weaving equipment, employing a combination of ground combs, spandex combs, and pile combs in the weaving process: the spandex combs and ground combs are fully threaded to form an elastic base fabric, giving the fabric basic extensibility and dimensional stability; the pile combs are used to adjust the warp ratio, padding yarn trajectory, and weave structure to control the pile height and distribution, creating a basic embossed pattern effect on the fabric surface. This process is mature and has high production efficiency, meeting the mass production needs of ordinary fleece fabrics, but it has significant limitations in terms of fabric texture and appearance. The fleece surface is mainly flat, lacking layering and three-dimensional visual effects, and the overall shape stability of the fabric is insufficient.

[0004] To enhance the added value of fabrics, the industry has been experimenting with overlaying a three-dimensional bubble wrinkle effect onto stretch fleece to improve texture and fluffiness. Existing technologies primarily achieve this through two approaches: First, by segmenting and splicing basic weave structures such as chain weaving, weft insertion, and warp pressing, local shrinkage differences are created to produce bubble-like protrusions. However, this approach struggles to achieve a uniform and durable three-dimensional bubble effect, and the complex weave design and difficult machine setup make it challenging. Second, physical / chemical processing such as post-processing (bubbling, wrinkling, heat setting, etc.) forces the fabric to form a bubble wrinkle structure. While this achieves a three-dimensional appearance, it has significant drawbacks: cumbersome production processes, numerous post-processing steps, and increased energy consumption and processing costs; the bubble wrinkles are formed by external force, resulting in poor structural stability and weak wash resistance, causing the bubble shape to collapse and disappear after multiple washes, making the three-dimensional effect difficult to maintain; simultaneously, post-processing can lead to a stiffer fabric feel and reduced elasticity, making it difficult to achieve a balance between bubble shape stability, fleece fullness, and elastic comfort.

[0005] Therefore, it is necessary to develop a warp-knitted fabric that combines three-dimensional bubble wrinkles and elastic fleece feel directly formed by the weaving structure without complicated finishing. Summary of the Invention

[0006] Existing warp-knitted stretch fleece fabrics suffer from common problems such as insufficient three-dimensional effect, poor washability of the bubble effect, complex production process, and high cost. They cannot simultaneously meet the comprehensive requirements of fabric three-dimensionality, fleece feel, elasticity, and shape stability, thus hindering the development and application of high-end warp-knitted stretch fleece fabrics. The purpose of this invention is to provide a warp-knitted symmetrical geometric jacquard stretch bubble fleece fabric and its production process. This process is based on the weaving principle of warp-knitted fleece fabrics and the good resilience of spandex. By rationally designing the structure and weave pattern of the spandex combs, differential shrinkage occurs on the fabric surface, structurally achieving the integrated molding of the bubble texture and the elastic base fabric. This structure endows the bubble with a stable spatial shape during weaving, enabling it to resist external stress during finishing and use, thereby significantly improving the post-wash durability and shape stability of the bubble structure. Furthermore, this process completes the molding of the elastic base fabric, upright fleece, and three-dimensional bubble in one step during weaving; the process is simple, energy-efficient, and low-cost.

[0007] To achieve the above objectives, the following technical solution is provided: The first objective of this invention is to provide a production process for warp-knitted symmetrical geometric jacquard elastic bubble fleece fabric, comprising the following: The fabric is woven on a single-needle bed four-comb Trico warp knitting machine or a double-needle bed seven-comb Raschel warp knitting machine equipped with an electronic warp feed device; wherein, when woven on a single-needle bed four-comb Trico warp knitting machine, the pile comb GB1 is fully threaded to weave a multi-needle warp plain weave; GB2 is fully threaded to weave a warp plain weave; and spandex combs GB3 and GB4 are woven with open thread and symmetrical padding yarns to weave a warp satin weave, a warp plain weave, and their variations. When weaving on a double-needle bed seven-comb Raschel warp knitting machine, spandex combs GB1, GB2 and GB6, GB7 use symmetrical padding and open threading to weave warp satin, warp plain and their variations separately on the front and back needle beds; GB3 and GB5 are used to weave warp plain separately on the front and back needle beds; and pile combs GB4 are used to alternately padding yarns between the front and back to connect two single-sided fabrics.

[0008] In one embodiment, the single-needle bed four-comb tricot warp knitting machine is designated as E28~E32.

[0009] In one embodiment, the serial number of the double-needle bed seven-comb Raschel warp knitting machine is E22 or E28.

[0010] In one embodiment, the production process of the warp-knitted symmetrical geometric jacquard elastic bubble fleece fabric includes the following steps: 1) Material selection: For single-needle bed four-comb Trico warp knitting machines, 75~120D matte polyester FDY, 50~75D semi-dull polyester FDY, and 30~70D spandex are selected as raw materials; for double-needle bed seven-comb Raschel warp knitting machines, 150~300D matte polyester FDY, 50~75D semi-dull polyester FDY, and 30~70D spandex are selected as raw materials. 2) Warping: The single-needle bed four-comb tricot warp knitting machine uses GB1 and GB2 to knit stable polyester fleece fabric. GB1 is fully threaded with matte polyester fleece, and GB2 is fully threaded with semi-gloss polyester fixed fleece base fabric. GB3 and GB4 are knitted with spandex symmetrical padding yarn. By designing the number of empty passes of the two guide bars, a symmetrical and continuous geometric pattern is formed. The total number of warp passes for GB3 and GB4 is n + m = the number of stitches in the two symmetrical structure cycles - 2, where n is the number of warp passes and m is the number of empty passes. The number of warp heads for each guide bar is calculated according to the width and machine number. GB3 and GB5 of the double-needle bed seven-comb Raschel warp knitting machine both use semi-dull polyester, with a stable polyester base fabric fully knitted on the front and rear needle beds respectively. GB4 uses dull polyester fully knitted, with yarn alternately padding the front and rear needle beds to connect the polyester base fabric. GB1 and GB2 of the front needle bed and GB6 and GB7 of the rear needle bed all use spandex partially knitted to form a local shrinkage track. Two pieces of pile fabric are formed by connecting yarns and other processes such as splitting pile. The number of warp heads of each comb bar is calculated according to the width and machine number. 3) Weaving: When weaving on a single needle bed, GB1 and GB2 weave a stable polyester base fabric. GB1 uses the long extension yarn of the multi-needle warp plain weave to form the fleece. GB2 uses the warp plain weave to fix the fleece. GB3 and GB4 symmetrically padded yarns weave the warp satin weave, the warp plain weave and its variations to form the fabric shrinkage track. When weaving with double needle beds, GB3 and GB5 are woven separately on the front and back needle beds. GB4 uses dull polyester to alternately pad yarns on the front and back needle beds to connect the polyester base fabric. GB1 and GB2 on the front needle bed and GB6 and GB7 on the back needle bed are all woven with symmetrical pad yarns to form warp satin, warp plain, and their variations. 4) Post-processing, inspection, and packaging.

[0011] In one embodiment, the elongation of the spandex in step (1) is 40% to 65%.

[0012] In one embodiment, in step (2), the guide bars GB1 and GB2 of the single-needle bed warp knitting machine are fully threaded, and the total number of threaded needles n+m of GB3 and GB4 is equal to the number of stitches in the two symmetrical weave structures minus 2, where the number of threaded needles n+m>n>1, and m>(n+m) / 2; the guide bars GB3, GB4 and GB5 of the double-needle bed warp knitting machine are fully threaded, and the total number of threaded needles p+q of GB1, GB2, GB6 and GB7 is equal to the number of stitches in the two symmetrical weave structures minus 2; p+q> the number of threaded needles p>1; the number of unthreaded needles q>(q+p) / 2.

[0013] In one embodiment, during weaving on the single-needle bed tricot warp knitting machine described in step (3), the selection and yarn threading methods for each guide bar structure are as follows: GB1: 7-8 / 1-0 / / Full penetration; GB2: 1-0 / 1-2 / / Full penetration; GB3: 1-0 / 1-2 / 2-3 / 3-4 / 4-5 / 5-6 / 6-7 / 7-8 / 7-6 / 6-5 / 5-4 / 4-3 / 3-2 / 2-1 / / n through m empty; GB4: 7-8 / 7-6 / 6-5 / 5-4 / 4-3 / 3-2 / 2-1 / 1-0 / 1-2 / 2-3 / 3-4 / 4-5 / 5-6 / 6-7 / / n-1 through m empty 1 through; Among them, the total number of warp threads n+m = the number of stitches in the two symmetrical weave structures - 2; n+m > the number of warp threads of the spandex comb n>1; the number of empty threads m>(n+m) / 2.

[0014] This scheme uses two symmetrical spandex combs, GB3 and GB4, to weave symmetrical geometric jacquard. To ensure the two symmetrically padded structures form continuous, uninterrupted rhombuses, n + m = the number of stitches in the two symmetrical structures - 2. Considering the overall thickness of the fabric, a smaller number of yarns threaded by the spandex comb would lead to insufficient shrinkage; therefore, the number of yarns threaded by the spandex comb is specified to be greater than 1. To form rhombuses of the same size with a noticeable bubble effect on the fabric surface, m > (n + m) / 2. The threading pattern of GB4 is n-1 threading, m skipping, and 1 threading, which connects with the path of the GB3 spandex yarn to form a regular and continuous geometric pattern. Furthermore, the padded directions of GB3 and GB4 are completely symmetrical, creating shrinkage forces in two directions on the fabric surface, making the prominent pile more three-dimensional and durable. Compared to the fabric surface formed by a single spandex comb, the fabric surface formed by symmetrically padded spandex combs has more balanced tension and a smoother surface.

[0015] In one embodiment, during weaving on the single-needle bed tricot warp knitting machine described in step (3), the selection and yarn threading methods for each guide bar structure are as follows: GB1: 5-6 / 1-0 / / Full penetration; GB2: 1-0 / 1-2 / / Full penetration; GB3: (1-0 / 1-2)×8 / 1-0 / 3-4 / (6-7 / 6-5)×8 / 6-7 / 4-3 / / 3 through 7; GB4: (6-7 / 6-5)×8 / 6-7 / 4-3 / (1-0 / 1-2)×8 / 1-0 / 3-4 / / 3 through 7; GB1 for combed pile fabrics can utilize varying needle spacing in a plain warp weave, altering the pile height, thickness, and weight of the pile fabric through changes in the transverse displacement of the comb needles. GB2 employs a two-needle plain warp weave to enhance the structural stability of the elastic base fabric. GB3 and GB4 for spandex combed pile fabrics feature symmetrical padding, using warp satin, plain warp, and variations thereof, creating a diamond-shaped, unevenly shrunk bubble effect through a specific pattern of open weaving.

[0016] In one embodiment, during weaving on the double-needle bed Raschel warp knitting machine described in step (3), the selection and yarn threading methods for each guide bar structure are as follows: GB1 Comb (F): 7-8-7-7 / 7-6-7-7 / 7-8-6-6 / 6-5-6-6 / 6-7-5-5 / 5-4-5-5 / 5-6-4-4 / 4-3-4 -4 / 4-5-3-3 / 3-2-3-3 / 3-4-2-2 / 2-1-2-2 / 2-3-1-1 / 1-0-1-1 / 1-2-1-1 / 1-0-2-2 / 2-3-2-2 / 2-1- 3-3 / 3-4-3-3 / 3-2-4-4 / 4-5-4-4 / 4-3-4-4 / 5-6-5-5 / 5-4-6-6 / 6-7-6-6 / 6-5-7-7 / / n through m empty; GB2 Comb (F): 1-0-1-1 / 1-2-1-1 / 1-0-2-2 / 2-3-2-2 / 2-1-3-3 / 3-4-3-3 / 3-2-4-4 / 4-5-4 -4 / 4-3-5-5 / 5-6-5-5 / 5-4-6-6 / 6-7-6-6 / 6-5-7-7 / 7-8-7-7 / 7-6-7-7 / 7-8-6-6 / 6-5-6-6 / 6-7- 5-5 / 5-4-5-5 / 5-6-4-4 / 4-3-4-4 / 4-5-3-3 / 3-2-3-3 / 3-4-2-2 / 2-1-2-2 / 2-3-1-1 / / n through m empty; GB3 Comb (F): 0-1-1-1 / 2-1-1-1 / / Full thread; GB4 Comb (M): 1-0-1-0 / 2-3-2-3 / / Full thread; GB5 Comb (B): 2-1-1-1 / 0-1-1-1 / / Full thread; GB6 Comb (B): 1-1-1-0 / 1-1-1-2 / 1-1-1-0 / 2-2-2-3 / 2-2-2-1 / 3-3-3-4 / 3-3-3-2 / 4-4-4 -5 / 4-4-4-3 / 5-5-5-6 / 5-5-5-4 / 6-6-6-7 / 6-6-6-5 / 7-7-7-8 / 7-7-7-6 / 7-7-7-8 / 6-6-6-5 / 6-6- 6-7 / 5-5-5-4 / 5-5-5-6 / 4-4-4-3 / 4-4-4-5 / 3-3-3-2 / 3-3-3-4 / 2-2-2-1 / 2-2-2-3 / / p through q empty; GB7 Comb (B): 7-7-7-8 / 7-7-7-6 / 7-7-7-8 / 6-6-6-5 / 6-6-6-7 / 5-5-5-4 / 5-5-5-6 / 4-4-4 -3 / 4-4-4-5 / 3-3-3-2 / 3-3-3-4 / 2-2-2-1 / 2-2-2-3 / 1-1-1-0 / 1-1-1-2 / 1-1-1-0 / 2-2-2-3 / 2-2- 2-1 / 3-3-3-4 / 3-3-3-2 / 4-4-4-5 / 4-4-4-3 / 5-5-5-6 / 5-5-5-4 / 6-6-6-7 / 6-6-6-5 / / p through q empty; Among them, the total number of needles p+q = the number of tissue loops in two symmetrical tissue structures - 2; p+q > the number of needles p>1; the number of needles q> (q+p) / 2.

[0017] In this process, the guide bars GB3 on the front needle bed and GB5 on the back needle bed are woven into a plain warp weave on the front and back needle beds respectively, forming a structurally stable base fabric. Spandex guides GB1 and GB2 on the front needle bed, and GB6 and GB7 on the back needle bed, are symmetrically padded on the front and back needle beds respectively, weaving a varied warp satin weave, using a p-through-q-out yarn-threading pattern to form a rhombus. To ensure that the two symmetrically padded weaves form a continuous rhombus, p + q = the number of stitches in the two symmetrical weave structures - 2. Considering that the fabric is relatively thick, a small number of padded yarns on the spandex guides would lead to insufficient shrinkage; therefore, the number of padded yarns on the spandex guides is specified to be >1. To form rhombuses of the same size with a noticeable bubble effect on the fabric surface, q > (p + q) / 2. Guide bar GB4 alternately padded yarns on the front and back needle beds to connect two separate fabrics, and then, through a splitting process, forms two bubble fleece fabrics. The length of the pile, the thickness of the fabric, and the weight can be adjusted by changing the stitch length of each warp yarn as it alternates between the front and back needle beds.

[0018] In one embodiment, the single-needle bed tricot warp knitting machine is a KS4.

[0019] In one embodiment, the double-needle bed Raschel warp knitting machine is an RS7 / 2F.

[0020] The second objective of this invention is to provide a warp-knitted symmetrical geometric jacquard elastic bubble fleece fabric obtained by the process described above.

[0021] The third objective of this invention is to provide an application of the aforementioned warp-knitted symmetrical geometric jacquard elastic bubble fleece fabric in winter home wear, outerwear, and other clothing fabrics, as well as home decor fabrics such as sofa covers and bedspreads.

[0022] This invention utilizes the principle of weaving elastic bubble fleece fabric using a single-needle bed multi-comb warp knitting machine: The full-thread weave of the GB1 comb creates long, extended lines on the fabric surface, which are then fixed by the full-thread weave of the GB2 comb to prevent these extended lines from unraveling under external force during finishing. The two spandex combs, GB3 and GB4, employ open-thread weave and symmetrical padding, acting as pattern combs. By varying the warp threading and weave structure of the two spandex combs, symmetrical geometric patterns can be created. To ensure the pattern effect and aesthetics of the fabric and to prevent damage to the spandex filaments during napping, the extended lines should be located in the innermost layer, meaning the spandex combs should be positioned at the very end.

[0023] The principle of knitting elastic bubble fleece fabric using a double-needle-bed multi-comb Raschel warp knitting machine: Two separate single-sided fabrics are woven on the front and back needle beds using two guide bars at the front and back of the machine, respectively. Two of the guide bars are spandex guide bars, employing symmetrical yarn padding and open-thread weaving to create differential shrinkage. Then, a central pile guide bar is used to alternately form loops on the front and back needle beds, connecting the two separate single-sided fabrics. Finally, the connecting yarn is split on a splitting machine to form two pile fabrics. The differential shrinkage of the spandex creates a bubble effect on the fabric surface, forming squares, diamonds, and other shapes.

[0024] The guide bar movement diagrams for two weave structures (GB1~GB4) of elastic bubble fleece fabric knitted on a single-needle bed four-comb warp knitting machine are shown below. Figure 1 and Figure 3 As shown. According to the formation principle of warp-knitted pile fabrics, the pile is formed by the long extension threads on the reverse side of the fabric through post-processing; therefore, the pile comb is located at the very front. The pile comb GB1 full-weave variation warp plain weave, such as... Figure 1 GB1 is shown as an eight-needle plain weave, with each warp yarn alternately padding every six stitches to form loops. The pile height can be adjusted by changing the stitch interval. Guide bars GB2, GB3, and GB4 are used to weave an elastic base fabric. GB3 and GB4 are symmetrical spandex guide bars with padding. GB3 is a warp satin weave, first padding seven consecutive rows to the right to form loops, then repeating the same padding motion in the opposite direction. GB4's padding motion is symmetrical to GB3. Two spandex guide bars, following a specific pattern, can create various designs, such as... Figure 1 In GB3, the warp threading pattern is 3 stitches and 11 loops, while in GB4 it's 2 stitches, 11 loops, and 1 stitch, resulting in a diamond-shaped appearance effect. GB2 uses a full-thread, two-needle plain weave to create a structurally stable base fabric. GB2 uses polyester yarn, while GB3 and GB4 use spandex. Due to the significant difference in elasticity between polyester and spandex, a differential shrinkage effect will occur on the fabric surface. Figure 1 Taking the fabric's texture as an example, the diamond-shaped edges shrink, causing the inside of the diamond to bulge, creating a bubble-like effect. Figure 2 As shown; Figure 3Taking the fabric structure as an example, the fabric surface shrinks along the sides of the rectangle, causing the inside of the rectangle to bulge, forming a bubble-like effect. Figure 4 As shown. The long extension yarns on the reverse side of the fabric are processed through finishing processes such as napping and shearing to form a pile of a certain height, ultimately creating a bubble fleece fabric with a certain elasticity. To avoid damage to the extension yarns of the spandex during finishing, the spandex comb is usually placed at the very end in single-needle bed warp knitting machines, meaning the extension yarns are located in the innermost layer of the fabric.

[0025] The guide bar movement diagram for knitting elastic bubble fleece fabric on a double-needle bed seven-comb Raschel warp knitting machine (GB1~GB7) is shown below. Figure 5 As shown. Guide bars GB1, GB2, and GB3 weave an elastic base fabric on the front needle bed, while GB5, GB6, and GB7 weave an elastic base fabric on the back needle bed. The two base fabrics are connected by guide bar GB4, which alternately pads yarns on the front and back needle beds. GB1 and GB2 use spandex yarns and symmetrically pad yarns to weave a varied warp-satin structure, a composite structure of two-needle plain warp and warp-satin, forming a diamond shape using a regular pattern of open stitches. Figure 5 The warp threading pattern for GB1 and GB2 is 2 threads and 10 passes. The guide bar GB3 fully threaded the polyester yarn into a two-needle plain weave on the front needle bed, forming a structurally stable base fabric. Due to the significant differences in shrinkage of the raw materials, a diamond-shaped differential shrinkage effect will occur on the fabric surface, forming bubble wrinkles. The principle of weaving the elastic base fabric on the back needle bed is the same as that on the front needle bed. The spandex guide bars GB6 and GB7 weave a symmetrical variable warp satin weave, and GB5 weaves a two-needle plain weave. Then, through the full threading of the pile guide bar GB4, the yarn is alternately placed on the front and back needle beds to weave a three-needle plain weave. Finally, finishing processes such as splitting the pile are used to separate the connecting lines of the two base fabrics, forming two pieces of elastic bubble fleece fabric. The weaving principles of single-needle and double-needle bed warp knitting machines are the same, but the arrangement of the guide bars is different. When knitting on a double-needle bed warp knitting machine, the pile guide bar is located in the center, and the extension line of the spandex yarn should be located in the innermost layer of the fabric. Therefore, the spandex guide bar is located on both sides, and the other guide bars are located between the two.

[0026] Beneficial effects: (1) When the present invention uses a single-needle bed Trico warp knitting machine to knit elastic bubble fleece, the first guide bar GB1 knits a multi-needle warp plain weave to form long extension lines on the reverse side of the fabric process, which is the basis for forming fleece; the second guide bar GB2 is made of polyester and knits a warp plain weave to form a stable base fabric; the third guide bar GB3 and the fourth guide bar GB4 are made of elastic spandex as raw material, and symmetrically padded yarns are knitted into warp satin, warp plain and their variations. By designing specific regular spandex loops, different symmetrical patterns of different shrinkage effects are generated on the base fabric. Then, the fleece surface is formed by finishing processes such as raising, and the overall bubble effect of the fabric is more obvious. (1) In this invention, when knitting elastic bubble fleece using a double-needle bed Raschel warp knitting machine, the first guide bar GB1, the second guide bar GB2, and the third guide bar GB3 knit the elastic base fabric on the front needle bed. Specifically, GB3 uses polyester to knit a warp plain weave to form a structurally stable base fabric, while GB1 and GB2 use spandex as symmetrical padding yarns to knit warp satin, warp plain weave, and their variations. A significant shrinkage effect is achieved by using partial open-thread knitting. The principle of knitting the elastic base fabric on the rear needle bed is the same as that on the front needle bed. Then, GB4 alternately pads yarns on the front and rear needle beds to connect the two independent fabrics. Finally, the bubble fleece effect is achieved through finishing processes such as splitting the fleece. The formation principle of elastic bubble fleece is mainly based on the elasticity difference between polyester and spandex. Different bubble fleece effects are formed by using open-thread knitting and symmetrical padding yarns of spandex yarns. In addition, different pile heights can be formed by varying the needle back and lateral shifting of the fleece comb, and different fleece textures can be knitted using polyester FDY with different thicknesses and monofilament counts. (2) This invention can be knitted in one step on both single-needle bed and double-needle bed warp knitting machines, effectively combining the elastic base fabric with the bubble fleece structure without the need for complex finishing processes such as bubble forming, thus simplifying the process flow. The density, pile height, and pattern effect of the bubble fleece can be flexibly adjusted by designing the weave structure and warp thread pattern, resulting in high design flexibility. The elastic bubble fleece fabric has a full, soft pile and good elasticity. The three-dimensionally distributed bubble fleece structure creates a large amount of still air between the skin and the fabric, which can enhance the warmth of the fabric and meet the needs of warm clothing in autumn and winter. Attached Figure Description

[0027] Figure 1 This is a motion diagram of the packing yarn of a comb GB1~GB4 structure knitted by a single-needle bed four-comb warp knitting machine in Embodiment 1 of the present invention; Figure 2 This is a frontal simulation diagram of a fabric process using a single-needle-bed four-comb tricot warp knitting machine to knit combs GB1~GB4 in Embodiment 1 of the present invention; Figure 3 This is a motion diagram of the packing yarn of a comb GB1~GB4 structure knitted by a single-needle bed four-comb warp knitting machine in Embodiment 2 of the present invention; Figure 4 This is a front simulation diagram of a fabric process using a single-needle bed four-comb warp knitting machine to knit combs GB1~GB4 in Embodiment 2 of the present invention; Figure 5 This is a motion diagram of the weave padding yarn of the guide bars GB1~GB7 knitted by a double needle bed seven-comb Raschel warp knitting machine in Embodiment 3 of the present invention; Figure 6 This is a frontal simulation diagram of the process of comparative example 1, which is knitted using a single-needle bed three-comb tricot warp knitting machine according to the present invention. Figure 7This is a frontal simulation diagram of the process of comparative example 2, which is knitted using a single-needle bed four-comb tricot warp knitting machine according to the present invention; Figure 8 This is a frontal simulation diagram of the process of comparative example 3, which is knitted using a single-needle bed three-comb tricot warp knitting machine according to the present invention. Detailed Implementation

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. The specific embodiments described below further illustrate the present invention.

[0029] Example 1 A warp-knitted symmetrical geometric jacquard elastic bubble fleece fabric is composed of the following percentages by weight: 50.04% 120D / 96f matte polyester FDY, 41.51% 75D / 36f semi-dull polyester FDY, 8.45% 70D spandex, and an elongation of 65.0%.

[0030] The fabric is manufactured using the following process: This includes the selection and matching of various comb structures, preparation processes, warping, weaving, and finishing. 1) Material selection: 120D / 96f matte polyester FDY, 75D / 36f semi-dull polyester FDY, and 70D spandex yarn are selected as raw materials; 2) Warping: Based on a width of 140cm and a horizontal density of 10.0wpc; GB1 warp is full thread, GB2 warp is full thread, and the total number of threads for GB3 is n+m = the number of stitches in the two symmetrical weave structures - 2 = 16 - 2 = 14, where n is the spandex thread count, which is 3, and m is the number of empty threads for GB3, i.e., GB3 warp is 3 threads and 11 empty threads, and GB4 warp is 2 threads, 11 empty threads, and 1 thread; the calculated warp head count is: GB1 and GB2 280×5, GB3 and GB4 150×2; The temperature at the warping site is 25±1℃, and the relative humidity is 65±5%. This relatively high and stable temperature and humidity help stabilize the twist of the polyester yarn and maintain a soft surface, preventing yarn tangling and facilitating the production of warp-knitted products. Because spandex has excellent elasticity, an additional draft rate needs to be set during warping; the draft rate is generally set to 70% and the speed to 200 m / min when warping spandex. 3) Weaving: Weaving is carried out using a single-needle bed Trico warp knitting machine with electronic warp feed device. Model: Trico KS4 warp knitting machine Model number: 28 pins Width: 130 inches Warp knitting structure and yarn threading method: GB1 comb: 7-8 / 1-0 / / full thread; GB2 comb: 1-0 / 1-2 / / full thread; GB3 comb: 1-0 / 1-2 / 2-3 / 3-4 / 4-5 / 5-6 / 6-7 / 7-8 / 7-6 / 6-5 / 5-4 / 4-3 / 3-2 / 2-1 / / 3 through 11 holes; GB4 comb: 7-8 / 7-6 / 6-5 / 5-4 / 4-3 / 3-2 / 2-1 / 1-0 / 1-2 / 2-3 / 3-4 / 4-5 / 5-6 / 6-7 / / 2 through 11 empty 1 through; raw material: GB1 comb bar: 120D / 96f matte polyester FDY, GB2 comb bar: 75D / 36f semi-dull polyester FDY, GB3 and GB4 comb bars: 70D spandex yarn; Input the organization of the yarn padding number, warp feed amount, and draft density into the computer display screen of the control cabinet, save it, load the machine text, and start the machine; after weaving, the raw fabric is obtained, weighed, bagged, and put into storage; 4) Finishing: turning the fabric, sewing the ends, pre-shaping, napping, width setting, dyeing, ironing and cutting, and rolling; 5) Testing and packaging.

[0031] Through the above process, a warp-knitted elastic bubble fleece fabric can be obtained. Due to the difference in shrinkage, spandex with good recovery and polyester with poor recovery produce an uneven effect on the fabric surface, forming raised diamond-shaped bubble fleece on the reverse side of the process. The fleece is more upright, has a stronger luster, a softer feel, and is more elastic, making it suitable for blankets and sofa fabrics.

[0032] Comparative Example 1 A warp-knitted asymmetrical geometric jacquard elastic bubble fleece fabric is composed of the following mass percentages: 50.04% 120D / 96f matte polyester FDY, 41.51% 75D / 36f semi-dull polyester FDY, 8.45% 70D spandex, and an elongation of 65.0%.

[0033] The fabric manufacturing process is as follows: the specific process flow of each process is as follows: including the selection and matching of each comb structure, preparation process, warping, weaving, and finishing.

[0034] 1) Material selection: 120D / 96f matte polyester FDY, 75D / 36f semi-dull polyester FDY, and 70D spandex yarn are selected as raw materials; 2) Warping: Based on a width of 140cm and a horizontal density of 10.0wpc, GB1 warping is full-width, GB2 warping is full-width, and GB3 warping is 3-width and 7-spaced; the calculated warping head count is: GB1 and GB2 are 280×5, and GB3 is 140×3.

[0035] The temperature at the warping site is 25±1℃, and the relative humidity is 65±5%. This relatively high and stable temperature and humidity help stabilize the twist of the polyester yarn and maintain a soft surface, preventing the yarns from tangling and facilitating the production of warp-knitted products. Because spandex has excellent elasticity, an additional draft rate needs to be set during warping; the draft rate is generally set to 70% and the speed to 200 m / min when warping spandex.

[0036] 3) Weaving: Weaving is carried out using a single-needle bed Trico warp knitting machine with electronic warp feed device. Model: Trico KS3 warp knitting machine Model number: 28 pins Width: 130 inches Warp knitting structure and yarn threading method: GB1 comb: 7-8 / 1-0 / / full thread; GB2 comb: 1-0 / 1-2 / / full thread; GB3 comb: 1-0 / 2-3 / 2-1 / 3-4 / 3-2 / 4-5 / 4-3 / 5-6 / 5-4 / 6-7 / 6-5 / 7-8 / 7-6 / 8-9 / 8-7 / 9-10 / 6-5 / / 3 through 7 open; raw material: GB1 comb bar: 120D / 96f matte polyester FDY, GB2 comb bar: 75D / 36f semi-dull polyester FDY, GB3 comb: 70D spandex yarn.

[0037] Input the weaving pattern, warp feed amount, and draft density into the computer display screen of the control cabinet, save the data, load the machine file, and then start the machine. After weaving, the raw fabric is obtained, weighed, bagged, and stored in the warehouse.

[0038] 4) Finishing: turning the fabric, sewing the ends, pre-shaping, napping, width setting, dyeing, ironing and cutting, and rolling.

[0039] 5) Testing and packaging.

[0040] After the above processes, a warp-knitted asymmetrical geometric jacquard elastic bubble fleece fabric is obtained. This structure uses only a single spandex comb for weaving. Due to the different shrinkage properties of the raw materials, a concave-convex effect can be produced on the fabric surface, but it cannot form a symmetrical, four-way continuous geometric pattern. The spandex in the shrinkage area of ​​this structure has different shrinkage properties due to the different weave structure. Areas with longer extension lines have greater shrinkage than those with shorter extension lines. For example, the extension lines in 6-5 / 7-8 are longer and have a certain angle. Because the yarn padding direction of these extension lines is consistent, after weaving, these extension lines will shrink to one side, resulting in uneven fabric tension and a less significant concave-convex effect on the fabric surface. The fabric surface stability is worse than that formed by symmetrical yarn padding with two combs. Furthermore, the extension lines on both sides of area A are staggered and discontinuous, such as... Figure 6 As shown, these factors make it difficult for this structure to form a symmetrical fabric with a smooth surface and full pile.

[0041] Comparative Example 2 A warp-knitted symmetrical geometric jacquard elastic bubble fleece yarn fabric is composed of the following mass percentages: 50.04% 120D / 96f matte polyester FDY, 41.51% 75D / 36f semi-dull polyester FDY, 8.45% 70D spandex yarn, and an elongation of 65.0%.

[0042] The fabric manufacturing process is as follows: the specific process flow of each process is as follows: including the selection and matching of each comb structure, preparation process, warping, weaving, and finishing.

[0043] 1) Material selection: 120D / 96f matte polyester FDY, 75D / 36f semi-dull polyester FDY, and 70D spandex yarn are selected as raw materials; 2) Warping: Based on a width of 140cm and a warp density of 10.0wpc, GB1 warp is full warp, GB2 warp is full warp, if n+m is 17, and the spandex warp count is 3, then GB3 warp is 3 warp, 14 empty warp, and GB4 warp is 2 warp, 14 empty warp, 1 warp; the calculated warp head count is: GB1, GB2 is 280×5, GB3 is 82×3+3, and GB4 is 82×3+2.

[0044] The temperature at the warping site is 25±1℃, and the relative humidity is 6±5%. Higher and more stable temperatures and humidity help stabilize the twist of the polyester yarn and maintain a soft surface, preventing yarn tangling and facilitating the production of warp-knitted products. Because spandex has excellent elasticity, an additional draft rate needs to be set during warping; the draft rate is generally set to 70% and the speed to 200 m / min.

[0045] 3) Weaving: Weaving is carried out using a single-needle bed Trico warp knitting machine with electronic warp feed device. Model: Trico KS4 warp knitting machine Model number: 28 pins Width: 130 inches Warp knitting structure and yarn threading method: GB1 comb: 7-8 / 1-0 / / full thread; GB2 comb: 1-0 / 1-2 / / full thread; GB3 comb: 1-0 / 1-2 / 2-3 / 3-4 / 4-5 / 5-6 / 6-7 / 7-8 / 7-6 / 6-5 / 5-4 / 4-3 / 3-2 / 2-1 / / 3 through 14 holes; GB4 comb: 7-8 / 7-6 / 6-5 / 5-4 / 4-3 / 3-2 / 2-1 / 1-0 / 1-2 / 2-3 / 3-4 / 4-5 / 5-6 / 6-7 / / 2 through 14 gaps 1 through; raw material: GB1 comb bar: 120D / 96f matte polyester FDY, GB2 comb bar: 75D / 36f semi-dull polyester FDY, GB3 and GB4 combs: 70D spandex yarn.

[0046] Input the weaving pattern, warp feed amount, and draft density into the computer display screen of the control cabinet, save the data, load the machine file, and then start the machine. After weaving, the raw fabric is obtained, weighed, bagged, and stored in the warehouse.

[0047] 4) Finishing: turning the fabric, sewing the ends, pre-shaping, napping, width setting, dyeing, ironing and cutting, and rolling.

[0048] 5) Testing and packaging.

[0049] Through the above process, a warp-knitted elastic bubble fleece fabric is obtained. Although this fabric is formed using two symmetrical spandex combs with padding yarns, compared with Example 1, due to the design difference in the number of spandex loops, the fabric clearly exhibits two types of bubble areas: a large-area longitudinal bubble area A and a localized diamond-shaped bubble area B. Figure 7 It is impossible to form a pattern that is the same size, symmetrical, and continuous in all directions like in Example 1. The fabric tension is improved compared to Comparative Example 1, but the inflection point of the fold line in region A is broken, and the overall stability and smoothness of the fabric are worse than in Example 1.

[0050] Example 2 A warp-knitted symmetrical geometric jacquard elastic seersucker fabric is composed of the following percentages by weight: 53.23% of 75D / 144f matte polyester FDY, 39.38% of 50D / 24f semi-dull polyester FDY, 7.39% of 40D spandex, and an elongation of 65.0%.

[0051] The fabric manufacturing process is as follows: the specific process flow of each process is as follows: including the selection and matching of each comb structure, preparation process, warping, weaving, and finishing.

[0052] 1) Material selection: 75D / 144f matte polyester FDY, 50D / 24f semi-dull polyester FDY, and 40D spandex yarn are selected as raw materials; 2) Warping: Based on a width of 150cm and a horizontal density of 11.0wpc, GB1 and GB2 are full warp; GB3 is 3 warp with 7 gaps; GB4 is 3 warp with 7 gaps; the calculated warp head count is: GB1 and GB2 are 275×6, GB3 and GB4 are 165×3.

[0053] The temperature at the warping site is 25±1℃, and the relative humidity is 65±5%. This relatively high and stable temperature and humidity help stabilize the twist of the polyester yarn and maintain a soft surface, preventing the yarns from tangling and facilitating the production of warp-knitted products. Because spandex has excellent elasticity, an additional draft rate needs to be set during warping; the draft rate is generally set to 70% and the speed to 200 m / min when warping spandex.

[0054] 3) Weaving: Weaving is carried out using a single-needle bed Trico warp knitting machine with electronic warp feed device. Model: Trico KS4 warp knitting machine Model number: 32 pins Width: 130 inches Warp knitting structure and yarn threading method: GB1 comb: 5-6 / 1-0 / / full thread; GB2 comb: 1-0 / 1-2 / / full thread; GB3 comb: (1-0 / 1-2)×8 / 1-0 / 3-4 / (6-7 / 6-5)×8 / 6-7 / 4-3 / / 3 through 7; GB4 comb: (6-7 / 6-5)×8 / 6-7 / 4-3 / (1-0 / 1-2)×8 / 1-0 / 3-4 / / 3 through 7 holes; raw material: GB1 comb bar: 75D / 144f matte polyester FDY, GB2 comb bar: 50D / 24f semi-dull polyester FDY, GB3 and GB4 combs: 40D spandex yarn.

[0055] Input the weaving pattern, warp feed amount, and draft density into the computer display screen of the control cabinet, save the data, load the machine file, and then start the machine. After weaving, the raw fabric is obtained, weighed, bagged, and stored in the warehouse.

[0056] 4) Finishing: turning the fabric, sewing the ends, napping, pre-shaping, dyeing, rolling, dehydration, and finishing.

[0057] 5) Testing and packaging.

[0058] Through the above processes, a warp-knitted elastic bubble fleece fabric is obtained. The first comb is woven using matte polyester FDY, and the second comb is woven using semi-dull polyester FDY to reinforce the pile, forming longer extension lines on the reverse side. The third and fourth combs are woven using spandex yarns with a warp-knitted variation structure employing open-thread and symmetrical threading. Due to the significant difference in shrinkage between spandex and polyester, differential shrinkage occurs on the fabric surface, resulting in staggered, continuous rectangular bubble fleece. This fabric is soft to the touch and highly elastic, making it suitable for producing winter loungewear and other apparel fabrics.

[0059] Comparative Example 3 A warp-knitted symmetrical geometric jacquard elastic seersucker fabric is composed of the following percentages by weight: 53.23% of 75D / 144f matte polyester FDY, 39.38% of 50D / 24f semi-dull polyester FDY, 7.39% of 40D spandex, and an elongation of 65.0%.

[0060] The fabric manufacturing process is as follows: the specific process flow of each process is as follows: including the selection and matching of each comb structure, preparation process, warping, weaving, and finishing.

[0061] 1) Material selection: 75D / 144f matte polyester FDY, 50D / 24f semi-dull polyester FDY, and 40D spandex yarn are selected as raw materials; 2) Warping: Based on a width of 150cm and a horizontal density of 11.0wpc, GB1 and GB2 are full warp; GB3 is 3 warp and 11 gaps; GB4 is 3 warp and 11 gaps; the calculated warp head count is: GB1 and GB2 is 275×6, GB3 and GB4 is 117×3+3.

[0062] The temperature at the warping site is 25±1℃, and the relative humidity is 65±5%. This relatively high and stable temperature and humidity help stabilize the twist of the polyester yarn and maintain a soft surface, preventing the yarns from tangling and facilitating the production of warp-knitted products. Because spandex has excellent elasticity, an additional draft rate needs to be set during warping; the draft rate is generally set to 70% and the speed to 200 m / min when warping spandex.

[0063] 3) Weaving: Weaving is carried out using a single-needle bed Trico warp knitting machine with electronic warp feed device. Model: Trico KS4 warp knitting machine Model number: 32 pins Width: 130 inches Warp knitting structure and yarn threading method: GB1 comb: 5-6 / 1-0 / / full thread; GB2 comb: 1-0 / 1-2 / / full thread; GB3 comb: (1-0 / 1-2)×8 / 1-0 / 3-4 / (6-7 / 6-5)×8 / 6-7 / 4-3 / / 3 through 11 holes; GB4 comb: (6-7 / 6-5)×8 / 6-7 / 4-3 / (1-0 / 1-2)×8 / 1-0 / 3-4 / / 3 through 11 holes; raw material: GB1 comb bar: 75D / 144f matte polyester FDY, GB2 comb bar: 50D / 24f semi-dull polyester FDY, GB3 and GB4 combs: 40D spandex yarn.

[0064] Input the weaving pattern, warp feed amount, and draft density into the computer display screen of the control cabinet, save the data, load the machine file, and then start the machine. After weaving, the raw fabric is obtained, weighed, bagged, and stored in the warehouse.

[0065] 4) Finishing: turning the fabric, sewing the ends, napping, pre-shaping, dyeing, rolling, dehydration, and finishing.

[0066] 5) Testing and packaging.

[0067] Although the above process can produce a warp-knitted elastic bubble fleece fabric, observation... Figure 8 It is evident that there are large vertical bubbling areas A and localized rectangular bubbling areas B, making it impossible to form a symmetrical pattern of the same size as in Example 2. Even increasing the number of spandex yarns will result in long strips of bubble fleece of varying sizes.

[0068] Example 3 A warp-knitted geometric jacquard elastic seersucker fabric is composed of the following percentages by weight: 50.54% 200D / 288f matte polyester FDY, 41.51% 75D / 36f semi-dull polyester FDY, 7.95% 50D spandex, and an elongation of 65.0%.

[0069] The fabric manufacturing process is as follows: the specific process flow of each process is as follows: including the selection and matching of each comb structure, preparation process, warping, weaving, and finishing.

[0070] 1) Material selection: 200D / 288f matte polyester FDY, 75D / 36f semi-dull polyester FDY, and 50D spandex yarn are selected as raw materials; 2) Warping: Based on a width of 150cm and a horizontal density of 8.0wpc, the warp threads of GB1, GB2, GB6, and GB7 are 2 threads with 10 gaps, while the warp threads of GB3, GB4, and GB5 are full threads; the calculated warp thread count is: 200 for GB1, GB2, GB6, and GB7, and 300×4 for GB3, GB4, and GB5.

[0071] The temperature at the warping site is 25±1℃, and the relative humidity is 65±5%. This relatively high and stable temperature and humidity help stabilize the twist of the polyester yarn and maintain a soft surface, preventing the yarns from tangling and facilitating the production of warp-knitted products. Because spandex has excellent elasticity, an additional draft rate needs to be set during warping; the draft rate is generally set to 70% and the speed to 200 m / min when warping spandex.

[0072] 3) Weaving: Weaving is done on a double-needle-bed Raschel warp knitting machine with an electronic warp feed device. Model: Raschel warp knitting machine RS7 / 2F Model number: 22 pins Width: 130 inches Warp knitting structure and yarn threading method: GB1 Comb (F): 7-8-7-7 / 7-6-7-7 / 7-8-6-6 / 6-5-6-6 / 6-7-5-5 / 5-4-5-5 / 5-6-4-4 / 4-3-4 -4 / 4-5-3-3 / 3-2-3-3 / 3-4-2-2 / 2-1-2-2 / 2-3-1-1 / 1-0-1-1 / 1-2-1-1 / 1-0-2-2 / 2-3-2-2 / 2-1-3-3 / 3-4-3-3 / 3-2-4-4 / 4-5-4-4 / 4-3-4-4 / 5-6-5-5 / 5-4-6-6 / 6-7-6-6 / 6-5-7-7 / / 2 through 10 empty; GB2 Comb (F): 1-0-1-1 / 1-2-1-1 / 1-0-2-2 / 2-3-2-2 / 2-1-3-3 / 3-4-3-3 / 3-2-4-4 / 4-5-4 -4 / 4-3-5-5 / 5-6-5-5 / 5-4-6-6 / 6-7-6-6 / 6-5-7-7 / 7-8-7-7 / 7-6-7-7 / 7-8-6-6 / 6-5-6-6 / 6-7-5-5 / 5-4-5-5 / 5-6-4-4 / 4-3-4-4 / 4-5-3-3 / 3-2-3-3 / 3-4-2-2 / 2-1-2-2 / 2-3-1-1 / / 2 through 10 empty; GB3 Comb (F): 0-1-1-1 / 2-1-1-1 / / Full thread; GB4 Comb (M): 1-0-1-0 / 2-3-2-3 / / Full thread; GB5 Comb (B): 2-1-1-1 / 0-1-1-1 / / Full thread; GB6 Comb (B): 1-1-1-0 / 1-1-1-2 / 1-1-1-0 / 2-2-2-3 / 2-2-2-1 / 3-3-3-4 / 3-3-3-2 / 4-4-4 -5 / 4-4-4-3 / 5-5-5-6 / 5-5-5-4 / 6-6-6-7 / 6-6-6-5 / 7-7-7-8 / 7-7-7-6 / 7-7-7-8 / 6-6-6-5 / 6-6-6-7 / 5-5-5-4 / 5-5-5-6 / 4-4-4-3 / 4-4-4-5 / 3-3-3-2 / 3-3-3-4 / 2-2-2-1 / 2-2-2-3 / / 2 through 10 empty; GB7 Comb (B): 7-7-7-8 / 7-7-7-6 / 7-7-7-8 / 6-6-6-5 / 6-6-6-7 / 5-5-5-4 / 5-5-5-6 / 4-4-4 -3 / 4-4-4-5 / 3-3-3-2 / 3-3-3-4 / 2-2-2-1 / 2-2-2-3 / 1-1-1-0 / 1-1-1-2 / 1-1-1-0 / 2-2-2-3 / 2-2-2-1 / 3-3-3-4 / 3-3-3-2 / 4-4-4-5 / 4-4-4-3 / 5-5-5-6 / 5-5-5-4 / 6-6-6-7 / 6-6-6-5 / / 2 through 10 empty; raw material: GB1, GB2, GB6, GB7 comb bars: 50D spandex. GB3 and GB5 comb bars: 75D / 36f semi-dull polyester FDY GB4 comb bar: 200D / 288f matte polyester FDY.

[0073] Input the weaving pattern, warp feed amount, and draft density into the computer display screen of the control cabinet, save the data, load the machine file, and then start the machine. After weaving, the raw fabric is obtained, weighed, bagged, and stored in the warehouse.

[0074] 4) Finishing: splitting, combing, ironing, shearing, shaping, etc.

[0075] 5) Testing and packaging.

[0076] Through the above processes, a warp-knitted elastic bubble fleece fabric can be obtained. The front needle bed guides GB1 and GB2 are woven from spandex, with symmetrical yarn padding on both guides. A diamond-shaped pattern is achieved through the design of the spandex guide's structure and the interlacing pattern. The front needle bed guide GB3 is woven separately from semi-dull polyester to form the elastic base fabric. Due to the significant difference in elasticity between spandex and polyester, differential shrinkage occurs on the fabric surface, creating a bubble effect. The formation principle of the elastic base fabric on the back needle bed is the same as that of the front needle bed. The base fabrics woven on the front and back needle beds are connected by guides GB4, which alternately pad yarn on the front and back needle beds. After finishing the fabric, a splitting machine cuts the connecting yarn in the middle to form two separate fleece pieces. This fabric has a full, soft pile, good elasticity, and a diamond pattern, making it suitable for blankets and sofa fabrics.

[0077] The embodiments provided above are not intended to limit the scope of the invention, nor are the described steps intended to limit the order of execution. Any obvious modifications made to the invention by those skilled in the art based on existing common knowledge also fall within the scope of protection defined by the claims.

Claims

1. A production process for warp-knitted symmetrical geometric jacquard elastic bubble fleece fabric, characterized in that, The process includes the following: The fabric is woven on a single-needle bed four-comb Trico warp knitting machine or a double-needle bed seven-comb Raschel warp knitting machine with an electronic warp feed device; wherein, when woven on a single-needle bed four-comb Trico warp knitting machine, the pile comb GB1 is fully threaded to weave a multi-needle warp plain weave; GB2 is fully threaded to weave a warp plain weave; and spandex combs GB3 and GB4 are woven with open thread and symmetrical padding yarns to weave a warp satin weave, a warp plain weave, and their variations. When weaving on a double-needle bed seven-comb Raschel warp knitting machine, spandex combs GB1, GB2 and GB6, GB7 use symmetrical padding and open threading to weave warp satin, warp plain and their variations separately on the front and back needle beds; GB3 and GB5 are used to weave warp plain separately on the front and back needle beds; and pile combs GB4 are used to alternately padding yarns between the front and back to connect two single-sided fabrics.

2. The process according to claim 1, characterized in that, The serial numbers of the single-needle bed four-comb tricot warp knitting machine are E22~E32.

3. The process according to claim 1, characterized in that, The serial number of the double-needle bed seven-comb Raschel warp knitting machine is E22 or E28.

4. The process according to claim 1, characterized in that, The production process of the warp-knitted symmetrical geometric jacquard elastic bubble fleece fabric includes the following steps: 1) Material selection: For single-needle bed four-comb Trico warp knitting machines, 75~120D matte polyester FDY, 50~75D semi-dull polyester FDY, and 30~70D spandex are selected as raw materials; for double-needle bed seven-comb Raschel warp knitting machines, 150~300D matte polyester FDY, 50~75D semi-dull polyester FDY, and 30~70D spandex are selected as raw materials. 2) Warping: The single-needle bed four-comb tricot warp knitting machine uses GB1 and GB2 to knit stable polyester fleece fabric. GB1 is fully threaded with matte polyester fleece, and GB2 is fully threaded with semi-gloss polyester fixed fleece base fabric. GB3 and GB4 are knitted with spandex symmetrical padding yarn. By designing the number of empty passes of the two guide bars, a symmetrical and continuous geometric pattern is formed. The total number of warp passes for GB3 and GB4 is n + m = the number of stitches in the two symmetrical structure cycles - 2, where n is the number of warp passes and m is the number of empty passes. The number of warp heads for each guide bar is calculated according to the width and machine number. GB3 and GB5 of the double-needle bed seven-comb Raschel warp knitting machine both use semi-dull polyester, with a stable polyester base fabric fully knitted on the front and rear needle beds respectively. GB4 uses dull polyester fully knitted, with yarn alternately padding the front and rear needle beds to connect the polyester base fabric. GB1 and GB2 of the front needle bed and GB6 and GB7 of the rear needle bed all use spandex partially knitted to form a local shrinkage track. Two pieces of pile fabric are formed by connecting yarns and other processes such as splitting pile. The number of warp heads of each comb bar is calculated according to the width and machine number. 3) Weaving: When weaving on a single needle bed, GB1 and GB2 weave a stable polyester base fabric. GB1 uses the long extension yarn of the multi-needle warp plain weave to form the fleece. GB2 uses the warp plain weave to fix the fleece. GB3 and GB4 symmetrically padded yarns weave the warp satin weave, the warp plain weave and its variations to form the fabric shrinkage track. When weaving with double needle beds, GB3 and GB5 are woven separately on the front and back needle beds. GB4 uses dull polyester to alternately pad yarns on the front and back needle beds to connect the polyester base fabric. GB1 and GB2 on the front needle bed and GB6 and GB7 on the back needle bed are all woven with symmetrical pad yarns to form warp satin, warp plain, and their variations. 4) Post-processing, inspection, and packaging.

5. The process according to claim 4, characterized in that, In step (2), the guide bars GB1 and GB2 of the single-needle bed warp knitting machine are fully threaded, and the total number of threaded needles for GB3 and GB4 is n+m = the number of stitches in the two symmetrical weave structures - 2, where the number of threaded needles n+m>n>1, m>(n+m) / 2; the guide bars GB3, GB4 and GB5 of the double-needle bed warp knitting machine are fully threaded, and the total number of threaded needles for GB1, GB2, GB6 and GB7 is p+q = the number of stitches in the two symmetrical weave structures - 2; p+q> the number of threaded needles p>1; the number of unthreaded needles q>(q+p) / 2.

6. The process according to claim 4, characterized in that, In step (3), the selection of each guide bar structure and the yarn threading method during weaving on the single-needle bed tricot warp knitting machine are as follows: GB1: 7-8 / 1-0 / / Full penetration; GB2: 1-0 / 1-2 / / Full penetration; GB3: 1-0 / 1-2 / 2-3 / 3-4 / 4-5 / 5-6 / 6-7 / 7-8 / 7-6 / 6-5 / 5-4 / 4-3 / 3-2 / 2-1 / / n through m empty; GB4: 7-8 / 7-6 / 6-5 / 5-4 / 4-3 / 3-2 / 2-1 / 1-0 / 1-2 / 2-3 / 3-4 / 4-5 / 5-6 / 6-7 / / n-1 through m empty 1 through; Among them, the total number of warp threads n+m = the number of stitches in the two symmetrical weave structures - 2; n+m > the number of warp threads of the spandex comb n>1; the number of empty threads m>(n+m) / 2.

7. The process according to claim 4, characterized in that, In step (3), the selection of each guide bar structure and the yarn threading method during weaving on the single-needle bed tricot warp knitting machine are as follows: GB1: 5-6 / 1-0 / / Full penetration; GB2: 1-0 / 1-2 / / Full penetration; GB3: (1-0 / 1-2)×8 / 1-0 / 3-4 / (6-7 / 6-5)×8 / 6-7 / 4-3 / / 3 through 7; GB4: (6-7 / 6-5)×8 / 6-7 / 4-3 / (1-0 / 1-2)×8 / 1-0 / 3-4 / / 3 through 7 empty.

8. The process according to claim 4, characterized in that, In step (3), the selection and yarn threading methods for each guide bar structure on the double-needle bed Raschel warp knitting machine during weaving are as follows: GB1 Comb (F): 7-8-7-7 / 7-6-7-7 / 7-8-6-6 / 6-5-6-6 / 6-7-5-5 / 5-4-5-5 / 5-6-4-4 / 4-3-4 -4 / 4-5-3-3 / 3-2-3-3 / 3-4-2-2 / 2-1-2-2 / 2-3-1-1 / 1-0-1-1 / 1-2-1-1 / 1-0-2-2 / 2-3-2-2 / 2-1- 3-3 / 3-4-3-3 / 3-2-4-4 / 4-5-4-4 / 4-3-4-4 / 5-6-5-5 / 5-4-6-6 / 6-7-6-6 / 6-5-7-7 / / n through m empty; GB2 Comb (F): 1-0-1-1 / 1-2-1-1 / 1-0-2-2 / 2-3-2-2 / 2-1-3-3 / 3-4-3-3 / 3-2-4-4 / 4-5-4 -4 / 4-3-5-5 / 5-6-5-5 / 5-4-6-6 / 6-7-6-6 / 6-5-7-7 / 7-8-7-7 / 7-6-7-7 / 7-8-6-6 / 6-5-6-6 / 6-7- 5-5 / 5-4-5-5 / 5-6-4-4 / 4-3-4-4 / 4-5-3-3 / 3-2-3-3 / 3-4-2-2 / 2-1-2-2 / 2-3-1-1 / / n through m empty; GB3 Comb (F): 0-1-1-1 / 2-1-1-1 / / Full thread; GB4 Comb (M): 1-0-1-0 / 2-3-2-3 / / Full thread; GB5 Comb (B): 2-1-1-1 / 0-1-1-1 / / Full thread; GB6 Comb (B): 1-1-1-0 / 1-1-1-2 / 1-1-1-0 / 2-2-2-3 / 2-2-2-1 / 3-3-3-4 / 3-3-3-2 / 4-4-4 -5 / 4-4-4-3 / 5-5-5-6 / 5-5-5-4 / 6-6-6-7 / 6-6-6-5 / 7-7-7-8 / 7-7-7-6 / 7-7-7-8 / 6-6-6-5 / 6-6- 6-7 / 5-5-5-4 / 5-5-5-6 / 4-4-4-3 / 4-4-4-5 / 3-3-3-2 / 3-3-3-4 / 2-2-2-1 / 2-2-2-3 / / p through q empty; GB7 Comb (B): 7-7-7-8 / 7-7-7-6 / 7-7-7-8 / 6-6-6-5 / 6-6-6-7 / 5-5-5-4 / 5-5-5-6 / 4-4-4 -3 / 4-4-4-5 / 3-3-3-2 / 3-3-3-4 / 2-2-2-1 / 2-2-2-3 / 1-1-1-0 / 1-1-1-2 / 1-1-1-0 / 2-2-2-3 / 2-2- 2-1 / 3-3-3-4 / 3-3-3-2 / 4-4-4-5 / 4-4-4-3 / 5-5-5-6 / 5-5-5-4 / 6-6-6-7 / 6-6-6-5 / / p through q empty; Among them, the total number of needles p+q = the number of tissue loops in two symmetrical tissue structures - 2; p+q > the number of needles p>1; the number of needles q> (q+p) / 2.

9. Warp-knitted symmetrical geometric jacquard elastic bubble fleece fabric obtained by the process described in any one of claims 1 to 8.

10. The application of the warp-knitted symmetrical geometric jacquard elastic bubble fleece fabric of claim 9 in the preparation of winter homewear, sofa covers, and bedspreads.

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