Preparation method of warp-knitted single-sided bidirectional support high-density pile fabric

Abstract

The application relates to a preparation method of a warp-knitted single-surface bidirectional support high-density pile fabric, characterized in that the warp-knitted single-surface bidirectional support high-density pile fabric comprises a five-layer structure, and from top to bottom, the five-layer structure is a pile layer, an extension thread layer, a first loop layer, a second loop layer and a third loop layer; the preparation process comprises the following steps: step A, three guide bars are used to prepare a warp-knitted fabric on a warp-knitting machine, one surface of the formed fabric is a close cross extension thread structure, and the other surface is a close loop structure; step B, the surface with the close cross extension thread structure is subjected to shearing; and step C, post-finishing of the fabric, water washing, drying and ironing. The application has the advantages of bidirectional support of pile on the surface of the raised fabric, no easy lodging, better pressure recovery effect, and the like, and meanwhile, the preparation process is simple, environment-friendly and the like.

Description

Technical Field

[0001] This invention relates to the field of textile technology, and in particular to a method for preparing a warp-knitted single-sided bidirectional support high-density pile fabric. Background Technology

[0002] As people's living standards improve, their quality requirements for pile fabrics are also increasing. Existing pile fabrics generally suffer from problems such as easy flattening of the pile and difficulty in recovery. Currently, methods to improve the pressure recovery of pile fabrics mainly focus on four aspects: fiber, yarn, fabric, and finishing. Regarding fiber selection, the stiffer and coarser the fiber, the less likely the pile on the surface of the resulting pile will flatten. Regarding yarn selection, the higher the twist and the finer the yarn, the better the pressure recovery of the pile in the resulting pile. Regarding fabric design, the higher the fabric density, the less likely the pile on the surface will flatten, and the better the pressure recovery. Regarding fabric finishing methods, pile fabrics treated with brushing, shearing, and calendering exhibit better pressure recovery of the pile.

[0003] Patent application number 201710460108.2 discloses a production process for warp-knitted brushed decorative fabric. It uses a warp-knitted fabric that has been brushed, dyed, and set as the surface layer, and a woven spring spun fabric as the bottom layer. The two layers are bonded together with an oil-based adhesive to obtain a brushed fabric. Although the nap on this fabric surface is not easily flattened and the fabric preparation process is simple, the use of oil-based adhesive in the composite fabric makes it environmentally unfriendly and difficult to clean. Patent application number 201811644022.6 discloses a finishing process to prevent nap flattening. After pre-setting the fabric, it undergoes two shearing and combing processes, followed by re-setting, dyeing, and softening finishing to make the nap on the fabric surface soft, smooth, and not easily flattened. However, its preparation process is more complex, and the use of softening agents makes it difficult to maintain the fabric's good performance for a long time. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the pile on the surface of existing pile fabrics is easy to flatten, difficult to recover, environmentally unfriendly and complicated in preparation process. The present invention provides a method for preparing warp-knitted single-sided bidirectional support high-density pile fabric, which makes the pile on the surface of the pile fabric have bidirectional support, is not easy to flatten, and has good pressure resistance and recovery effect, while taking into account its simple preparation process and environmental protection characteristics.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a method for preparing a warp-knitted single-sided bidirectional support high-density pile fabric, characterized in that: the warp-knitted single-sided bidirectional support high-density pile fabric comprises a five-layer structure, from top to bottom being a pile layer, an extension yarn layer, a first loop layer, a second loop layer, and a third loop layer, and its preparation process includes the following steps:

[0006] Step A involves using three comb bars on a warp knitting machine to prepare warp-knitted fabric, resulting in a fabric with a tight cross-stretched yarn structure on one side and a tight loop structure on the other side.

[0007] Step B: Shear the fabric surface with a tightly intersecting extended line structure;

[0008] Step C: Fabric finishing, including washing, drying, and calendering.

[0009] Furthermore, in step A, during the weaving of the warp-knitted fabric, the yarns on the first guide bar GB1 and the second guide bar GB2 are woven to form a cross-extension yarn structure, a first loop layer, and a second loop layer of the warp-knitted single-sided bidirectional support high-density pile fabric. The yarns on the third guide bar GB3 are woven to form an extension yarn layer and a third loop layer of the warp-knitted single-sided bidirectional support high-density pile fabric.

[0010] Furthermore, in step A, the yarn threading method of the three guide bars for weaving the warp-knitted fabric is full threading.

[0011] Furthermore, the yarn threaded through the first comb GB1 is polyester yarn.

[0012] Furthermore, the yarn threaded through the second comb GB2 is polyester yarn.

[0013] Furthermore, the yarn inserted into the third comb GB3 is a polyester-spandex covered yarn with good elastic recovery.

[0014] Furthermore, the weaving method of the warp-knitted single-sided bidirectional support high-density pile fabric is as follows: the first comb GB1 and the second comb GB2 adopt a symmetrical padding yarn warp satin weave to form a symmetrical structure, and the third comb GB3 adopts a warp plain weave.

[0015] Furthermore, the tightly intersecting extended lines of the warp-knitted single-sided bidirectional support high-density pile fabric bulge due to the contraction of the extended line layer and the third coil layer.

[0016] Furthermore, in step B, the raised, tightly intersecting extended lines of the warp-knitted fabric woven in step A are sheared to form a pile layer of a warp-knitted single-sided, bidirectional, high-density pile fabric.

[0017] Furthermore, the fibers of the pile layer formed in step B are tightly held and wrapped by the symmetrical structure between the extension line layer and the first coil layer and the second coil layer, which provides bidirectional support for the fibers, thereby making the fibers stand up.

[0018] The advantages of this invention are as follows:

[0019] (1) Polyester yarn and polyester-spandex covered yarn with good elastic recovery are used to knit on a warp knitting machine to form a tightly structured fabric. The cross extension lines of the upper layer of the fabric are raised, which is conducive to shearing. After shearing, the pile layer formed is tightly sandwiched and wrapped by the extension line layer and the first loop layer and the second loop layer. The symmetrical structure between the first loop layer and the second loop layer provides bidirectional support for the pile, making the pile stand up and not easy to fall down. In addition, the finishing after ironing further enhances the pile's resistance to falling down and its pressure recovery.

[0020] (2) The warp-knitted greige fabric of the warp-knitted single-sided bidirectional support high-density pile fabric designed in this invention is an integral weaving structure, which does not require complex composite processing technology and the preparation process is relatively simple and environmentally friendly. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the multi-layer structure of the warp-knitted single-sided bidirectional support high-density pile fabric described in this invention.

[0022] Figure 2 This is a schematic diagram of the superimposed structure of each layer of the warp-knitted single-sided bidirectional support high-density pile fabric described in this invention.

[0023] Figure 3 This is an example diagram of the padding motion of the warp-knitted fabric described in Embodiment 1 of the present invention.

[0024] Figure 4 This is an example diagram of the padding motion of the warp-knitted fabric described in Embodiment 2 of the present invention.

[0025] Figure 5 This is an example diagram of the padding motion of the warp-knitted fabric described in Embodiment 3 of the present invention.

[0026] Reference numerals: 1. Fluff layer; 2. Extension line layer; 3. First coil layer; 4. Second coil layer; 5. Third coil layer. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below. Example 1

[0029] A method for preparing a warp-knitted single-sided bidirectional supported high-density pile fabric, such as Figure 1 , Figure 2As shown, this warp-knitted single-sided bidirectional support high-density pile fabric comprises a five-layer structure, from top to bottom: 1. pile layer, 2. extension yarn layer, 3. first loop layer, 4. second loop layer, and 5. third loop layer. Its preparation process includes the following steps:

[0030] Step A involves using three comb bars on a warp knitting machine to prepare warp-knitted fabric, resulting in a fabric with a tight cross-stretched yarn structure on one side and a tight loop structure on the other side.

[0031] Step B: Shear the fabric surface with a tightly intersecting extended line structure;

[0032] Step C: Fabric finishing, including washing, drying, and calendering.

[0033] In step A, during the weaving of the warp-knitted fabric, the first guide bar (GB1) and the second guide bar (GB2) are fully woven with polyester yarn to form a cross-extension yarn structure, a first loop layer (3), and a second loop layer (4) of a warp-knitted single-sided bidirectional support high-density pile fabric. The third guide bar (GB3) is fully woven with polyester-spandex covered yarn, which has good elastic recovery, to form a second extension yarn layer and a third loop layer of a warp-knitted single-sided bidirectional support high-density pile fabric. The tightly cross-extension yarn surface of the warp-knitted single-sided bidirectional support high-density pile fabric bulges due to the shrinkage of the second extension yarn layer and the third loop layer (5). Figure 3 As shown, in this embodiment, the weaving method of the warp-knitted single-sided bidirectional support high-density pile fabric is that the first guide bar GB1 and the second guide bar GB2 adopt a warp satin weave with symmetrical padding yarns. The padding yarn numbers of GB1 are: 2-3 / 1-2 / 1-0 / 2-1 / / , and the padding yarn numbers of GB2 are: 1-0 / 2-1 / 2-3 / 1-2 / / . The third guide bar GB3 adopts a warp plain weave with padding yarn numbers: 1-2 / 1-0 / / .

[0034] Step B involves shearing the raised, tightly intersecting extended lines of the warp-knitted fabric woven in Step A to form the first pile layer of the warp-knitted single-sided bidirectional support high-density pile fabric. The pile of the first pile layer is tightly held and wrapped by the symmetrical structure between the second extended line layer and the third first loop layer and the fourth second loop layer, which provides bidirectional support for the pile and makes the pile stand up.

[0035] Step C involves washing, drying, and calendering the sheared warp-knitted fabric. The warp-knitted single-sided bidirectional support high-density pile fabric designed in this invention has an integral knitting structure, eliminating the need for complex composite processing and making the manufacturing process more environmentally friendly. Furthermore, polyester yarn and polyester-spandex covered yarn with good elastic recovery are used in full-thread knitting on a warp knitting machine to form a tightly structured fabric. The cross-extension lines on the upper layer of the fabric are raised, facilitating shearing. After shearing, the pile of the first pile layer is tightly held and wrapped by the second extension layer, the third first loop layer, and the fourth second loop layer. The symmetrical structure between the third first loop layer and the fourth second loop layer provides bidirectional support for the pile, making it upright and less prone to flattening. Furthermore, the calendering process further enhances the pile's resistance to flattening and its pressure recovery. The warp-knitted single-sided bidirectional support high-density pile fabric designed in this invention has good application potential in sofa upholstery fabrics. Example 2

[0036] A method for preparing a warp-knitted single-sided bidirectional supported high-density pile fabric, such as Figure 1 , Figure 2 As shown, this warp-knitted single-sided bidirectional support high-density pile fabric comprises a five-layer structure, from top to bottom: 1. pile layer, 2. extension yarn layer, 3. first loop layer, 4. second loop layer, and 5. third loop layer. Its preparation process is the same as in Example 1. Figure 4 As shown, in this embodiment, the weaving method of the warp-knitted single-sided bidirectional support high-density pile fabric is that the first guide bar GB1 and the second guide bar GB2 adopt a warp satin weave with symmetrical padding yarns. The padding yarn numbers of GB1 are: 2-3 / 2-1 / 1-0 / 1-2 / / , and the padding yarn numbers of GB2 are: 1-0 / 1-2 / 2-3 / 2-1 / / . The third guide bar GB3 adopts a warp plain weave with padding yarn numbers: 1-2 / 1-0 / / .

[0037] The warp-knitted single-sided bidirectional support high-density pile fabric designed in this invention has an integral woven structure, which does not require complex composite processing technology. Moreover, the fabric preparation process is more environmentally friendly, and the pile stands upright and is not easy to flatten, making it well applied in sofa upholstery fabrics. Example 3

[0038] A method for preparing a warp-knitted single-sided bidirectional supported high-density pile fabric, such as Figure 1 , Figure 2 As shown, this warp-knitted single-sided bidirectional support high-density pile fabric comprises a five-layer structure, from top to bottom: 1. pile layer, 2. extension yarn layer, 3. first loop layer, 4. second loop layer, and 5. third loop layer. Its preparation process is the same as in Example 1. Figure 5As shown, in this embodiment, the weaving method of the warp-knitted single-sided bidirectional support high-density pile fabric is that the first guide bar GB1 and the second guide bar GB2 adopt a warp satin weave with symmetrical padding yarns. The padding yarn numbers of GB1 are: 4-3 / 2-3 / 1-2 / 0-1 / 2-1 / 3-2 / / , and the padding yarn numbers of GB2 are: 0-1 / 2-1 / 3-2 / 4-3 / 2-3 / 1-2 / / . The third guide bar GB3 adopts a warp plain weave with padding yarn numbers: 1-2 / 1-0 / / .

[0039] The warp-knitted single-sided bidirectional support high-density pile fabric designed in this invention has an integral knitting structure, which does not require complex composite processing technology and is more environmentally friendly in preparation. The pile stands upright and is not easy to flatten, making it suitable for use in sofa upholstery fabrics.

Claims

1. A method for preparing a warp-knitted single-sided bidirectional supported high-density pile fabric, characterized in that: The warp-knitted single-sided bidirectional support high-density pile fabric comprises a five-layer structure, consisting of a pile layer, an extension yarn layer, a first loop layer, a second loop layer, and a third loop layer from top to bottom. Its preparation process includes the following steps: Step A: Using three guide bars on a warp knitting machine, warp-knitted fabric is prepared, so that one side of the fabric has a tight cross-extension yarn structure and the other side has a tight loop structure. The three guide bars are the first guide bar GB1, the second guide bar GB2, and the third guide bar GB3. The yarns on the first guide bar GB1 and the second guide bar GB2 are woven to form a cross-extension yarn structure, a first loop layer, and a second loop layer of warp-knitted single-sided bidirectional support high-density pile fabric. The yarns on the third guide bar GB3 are woven to form an extension yarn layer and a third loop layer of warp-knitted single-sided bidirectional support high-density pile fabric. The weaving method of the warp-knitted fabric is that the first guide bar GB1 and the second guide bar GB2 adopt a symmetrical padding yarn warp satin structure to form a symmetrical structure, and the third guide bar GB3 adopts a warp plain structure. Step B: Shear the fabric surface with a tightly intersecting extended line structure; Step C: Fabric finishing, including washing, drying, and calendering.

2. The method for preparing warp-knitted single-sided bidirectional supported high-density pile fabric according to claim 1, characterized in that: In step A, the yarn threading method for all three guide bars in the warp-knitted fabric is full threading.

3. The method for preparing warp-knitted single-sided bidirectional supported high-density pile fabric according to claim 1, characterized in that: The yarn threaded through the first comb GB1 is polyester yarn.

4. The method for preparing warp-knitted single-sided bidirectional supported high-density pile fabric according to claim 1, characterized in that: The yarn threaded through the second comb GB2 is polyester yarn.

5. The method for preparing warp-knitted single-sided bidirectional supported high-density pile fabric according to claim 1, characterized in that: The yarn inserted into the third comb GB3 is a polyester-spandex covered yarn with good elastic recovery.

6. The method for preparing warp-knitted single-sided bidirectional supported high-density pile fabric according to claim 1, characterized in that: The tightly intersecting extended lines of the warp-knitted single-sided bidirectional support high-density pile fabric bulge due to the contraction of the extended line layer and the third coil layer.

7. The method for preparing warp-knitted single-sided bidirectional supported high-density pile fabric according to claim 1, characterized in that: Step B involves shearing the raised, tightly intersecting extended lines of the warp-knitted fabric woven in step A to form a pile layer of a warp-knitted single-sided, bidirectional, high-density pile fabric.

8. The method for preparing warp-knitted single-sided bidirectional supported high-density pile fabric according to claim 1, characterized in that: The fluff layer formed in step B is tightly held and wrapped by the symmetrical structure between the extension line layer and the first coil layer and the second coil layer, which provides bidirectional support for the fluff, thereby making the fluff stand up.

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