A tear-resistant polyester yarn, a mesh cloth and a manufacturing method of the mesh cloth

Abstract

The present application relates to the field of textiles, and more particularly to a tear-resistant polyester yarn, a mesh fabric and a manufacturing method of the mesh fabric. The tear-resistant polyester yarn is mainly composed of tear-resistant polyester fibers, which are mainly prepared by melt spinning of tear-resistant particles and PET chips, and the mass percentage of the tear-resistant particles in the polyester fibers is 6-9%. The mesh fabric has the above-mentioned tear-resistant polyester yarn. The manufacturing method of the mesh fabric uses a double needle bed warp knitting machine with more than seven guide bars to weave, wherein the guide bar GB1, the guide bar GB5 and the guide bar GB6 are all threaded with the above-mentioned tear-resistant polyester yarn. By using the fiber spinning containing tear-resistant particles to form the tear-resistant yarn, the tear-resistant performance of the mesh fabric can be directly improved, which will not affect the thickness and air permeability of the mesh fabric itself, and the mesh fabric is not easy to be torn after intense exercise or long-term use, and still can maintain good strength, and applied to the vamp, which helps to improve the service life of the vamp.

Description

Technical Field

[0001] This invention relates to the textile field, and in particular to a tear-resistant polyester yarn, a mesh fabric, and a method for manufacturing the mesh fabric. Background Technology

[0002] Mesh fabric is a type of fabric with a mesh structure. Due to its lightweight and breathable properties, it is widely used in the uppers of athletic shoes. During exercise, athletic shoes inevitably experience various forces, causing the upper to bear tearing and friction. This can easily lead to localized tearing or cracking of the mesh fabric, as well as a significant decrease in strength and a relatively short lifespan.

[0003] To improve the tear resistance of shoe uppers, a common practice is to add a protective layer to the mesh base layer. Examples include Chinese invention patent application CN117468241A (disclosing a tear-resistant mesh for athletic shoes and its preparation method) and Chinese invention patent CN111136965B (disclosing a soft tear-resistant mesh for shoe uppers and its preparation method). While these methods increase the tear resistance of the upper, they also increase its thickness, affecting breathability. Furthermore, since the protective layer is usually located on the outer surface of the mesh base, the mesh base can still tear during strenuous activity, leading to a decrease in upper strength and affecting the shoe's lifespan.

[0004] In view of this, the applicant has conducted in-depth research on the above-mentioned issues, which led to this case. Summary of the Invention

[0005] The purpose of this invention is to provide a tear-resistant polyester yarn, a mesh fabric, and a method for manufacturing the mesh fabric that helps improve the service life of shoe uppers.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A tear-resistant polyester yarn, mainly composed of tear-resistant polyester fibers, which are mainly prepared by melt spinning of tear-resistant particles and PET chips, wherein the tear-resistant particles account for 6%-9% by mass in the polyester fibers.

[0008] As an improvement of the present invention, the tear-resistant particles are made from the following raw materials by mass percentage:

[0009] Aluminum borate whiskers 30%-40%,

[0010] Boron nitride nanosheets / microspheres account for 30%-40%,

[0011] Compatibilizer 1%-2%;

[0012] Remaining amount of water-soluble polyester chips.

[0013] A mesh fabric having the aforementioned tear-resistant polyester yarn.

[0014] As an improvement of the present invention, the mesh fabric is a warp-knitted mesh fabric, and its warp tear strength per unit weight is greater than 1 (N·m). 2 ) / g and less than 1.8 (N·m 2 ) / g.

[0015] A method for manufacturing a mesh fabric involves weaving using a double-needle bed warp knitting machine with seven or more guide bars. The seven guide bars, arranged sequentially on the double-needle bed warp knitting machine, are guide bar GB1, Jacquard guide bar JB1, Jacquard guide bar JB2, Jacquard guide bar JB3, Jacquard guide bar JB4, guide bar GB5, and guide bar GB6. The guide bars GB1, JB1, and GB6... Jacquard comb JB2 forms the surface layer by looping the front needle mattress yarn. Jacquard combs JB3 and JB4 alternately form the middle layer by looping the front and back needle mattress yarns, respectively. Jacquard combs GB5 and GB6 form the bottom layer by looping the back needle mattress yarn. Jacquard combs GB1, GB5, and GB6 are all threaded using the aforementioned tear-resistant polyester yarn.

[0016] As an improvement of the present invention, the Jacquard combs JB1 and JB2 are threaded with nylon fiber yarn, while the Jacquard combs JB3 and JB4 are threaded with polyester cationic fiber yarn.

[0017] As an improvement of the present invention, each comb bar is threaded with yarn in a full-thread manner.

[0018] As an improvement of the present invention, the yarn weave pattern of the guide bar GB1 is 1-0-0-0 / 0-1-1-1 / / ; the yarn weave pattern of the Jacquard guide bar JB1 is 1-0-1-1 / 1-2-1-1 / / ; the yarn weave pattern of the Jacquard guide bar JB2 is 1-0-1-1 / 1-2-1-1 / / ; the yarn weave pattern of the Jacquard guide bar JB3 is 1-0-1-2 / 1-2-1-0 / / ; the yarn weave pattern of the Jacquard guide bar JB4 is 1-0-1-2 / 1-2-1-0 / / ; the yarn weave pattern of the guide bar GB5 is 1-1-1-0 / 1-1-1-2 / / ; and the yarn weave pattern of the guide bar GB6 is 1-1-1-0 / 1-1-1-2 / / .

[0019] By adopting the above solution, the present invention has the following beneficial effects:

[0020] By using fibers containing tear-resistant particles to form tear-resistant yarns, the tear resistance of mesh fabric can be directly improved without the need for a protective layer on the mesh fabric. This not only does not affect the thickness and breathability of the mesh fabric itself, but also makes it less prone to tearing after strenuous exercise or prolonged use, and it can still maintain good strength. When applied to shoe uppers, it helps to improve the service life of the shoe uppers. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments.

[0022] Example 1

[0023] This embodiment provides a method for manufacturing a mesh fabric and the mesh fabric obtained by the method. The mesh fabric contains tear-resistant polyester yarn, which can also be sold independently or used in gas fabrics. Therefore, this embodiment also provides a tear-resistant polyester yarn.

[0024] The method for manufacturing the mesh fabric provided in this embodiment is to use a double-needle bed warp knitting machine with seven or more guide bars. The seven guide bars are arranged in the following order on the double-needle bed warp knitting machine: guide bar GB1, Jacquard guide bar JB1, Jacquard guide bar JB2, Jacquard guide bar JB3, Jacquard guide bar JB4, guide bar GB5, and guide bar GB6. In this embodiment, a double-needle bed warp knitting machine with seven guide bars and Jacquard guide bars is used as an example for explanation.

[0025] Each guide bar uses a full-thread method for yarn threading. Specifically, the yarn weave pattern of guide bar GB1 is 1-0-0-0 / 0-1-1-1 / / ; the yarn weave pattern of Jacquard guide bar JB1 is 1-0-1-1 / 1-2-1-1 / / ; the yarn weave pattern of Jacquard guide bar JB2 is 1-0-1-1 / 1-2-1-1 / / ; the yarn weave pattern of Jacquard guide bar JB3 is 1-0-1-2 / 1-2-1-0 / / ; the yarn weave pattern of Jacquard guide bar JB4 is 1-0-1-2 / 1-2-1-0 / / ; the yarn weave pattern of guide bar GB5 is 1-1-1-0 / 1-1-1-2 / / ; and the yarn weave pattern of guide bar GB6 is 1-1-1-0 / 1-1-1-2 / / .

[0026] Comb GB1, Comb GB5, and Comb GB6 all use tear-resistant polyester yarn for threading. The tear-resistant polyester yarn is mainly composed of tear-resistant polyester fibers, which are primarily prepared by melt spinning of tear-resistant particles and PET chips. The tear-resistant particles account for 6% of the mass percentage of the polyester fibers. It should be noted that the tear-resistant particles can be commercially available tear-resistant materials, such as sodium alginate-calcium sulfate whisker hybrid particles or nanofibers. Preferably, to improve the yarn strength, in this embodiment, the tear-resistant particles are prepared by melt extrusion of the following raw materials by mass percentage: 30% aluminum borate whiskers, 30% boron nitride nanosheets / microspheres, 1% compatibilizer, and 39% water-soluble polyester chips. The compatibilizer is maleic anhydride-grafted polyester.

[0027] Jacquard combs JB1 and JB2 use nylon fiber yarn for threading, while Jacquard combs JB3 and JB4 use polyester cationic fiber yarn for threading. Both nylon fiber yarn and polyester cationic fiber yarn can be purchased directly from the market and are not the focus of this embodiment, so they will not be described in detail here.

[0028] Guide bars GB1, Jacquard guide bars JB1 and JB2 form the surface layer by looping in the front needle bed yarn. Jacquard guide bars JB3 and JB4 alternately form the middle layer by looping in the front and back needle bed yarns, respectively. Guide bars GB5 and GB6 form the bottom layer by looping in the back needle bed yarn. In this way, the seven guide bars can work together to weave a three-layer warp-knitted spacer mesh (i.e., the mesh provided in this embodiment is a warp-knitted mesh), with a warp tear strength per unit weight greater than 1 (N·m). 2 ) / g and less than 1.8 (N·m 2 ) / g.

[0029] Example 2

[0030] The difference between this embodiment and Embodiment 1 is that, in this embodiment, the tear-resistant particles account for 7.5% by mass in the polyester fiber. The tear-resistant particles are made by melt extrusion of the following raw materials by mass percentage: 35% aluminum borate whiskers, 35% boron nitride nanosheets / microspheres, 1.5% compatibilizer, and 28.5% water-soluble polyester chips.

[0031] Example 3

[0032] The difference between this embodiment and Embodiment 1 is that, in this embodiment, the tear-resistant particles account for 9% of the polyester fiber by mass percentage, and the tear-resistant particles are made by melt extrusion of the following raw materials by mass percentage: 40% aluminum borate whiskers, 40% boron nitride nanosheets / microspheres, 2% compatibilizer and 18% water-soluble polyester chips.

[0033] To better demonstrate the tear resistance of the present invention, the present invention also provides the following four comparative examples.

[0034] Comparative Example 1

[0035] The difference between this comparative example and Example 2 is that, in this comparative example, the tear-resistant particles are made by melt extrusion of the following raw materials by mass percentage: 35% boron nitride nanosheets, 1.5% compatibilizer, and 63.5% water-soluble polyester chips. That is, the raw materials used in this comparative example do not contain aluminum borate whiskers.

[0036] Comparative Example 2

[0037] The difference between this comparative example and Example 2 is that, in this comparative example, the tear-resistant particles are made by melt extrusion of the following raw materials by mass percentage: 35% aluminum borate whiskers, 1.5% compatibilizer, and 63.5% water-soluble polyester chips. That is, the raw materials used in this comparative example do not contain aluminum borate whiskers. In other words, the raw materials used in this comparative example do not contain boron nitride nanosheets / microspheres.

[0038] Comparative Example 3

[0039] The difference between this comparative example and Example 2 is that in this comparative example, the tear-resistant particles account for 3.5% of the mass percentage of the polyester fiber.

[0040] Comparative Example 4

[0041] The difference between this comparative example and Example 2 is that in this comparative example, the tear-resistant particles account for 5.5% of the mass percentage of the polyester fiber.

[0042] For the mesh fabrics obtained in the above embodiments and comparative examples, the changes in warp tear strength per unit weight, flexural strength after aging treatment, and radial tear strength were tested. The aging treatment method was as follows: the warp-knitted spacer mesh fabric was placed in an oven and kept at a temperature of 50±1℃ for 8 hours, then cooled to 22±1℃; the temperature was then raised to 50±1℃ and kept at that temperature for another 8 hours, then cooled to 22±1℃; this heating and cooling process was repeated 8 times. The flexural strength test standard was "Technical Conditions for Low-Temperature Flexural Strength of Footwear Upper Materials QB / T 2224-2226-1996", and the tear strength test standard was GB / T3917.2-2009. It should be noted that the warp tear strength in this invention refers to the warp tear strength. The change in warp tear strength per unit weight, ΔF, is calculated as follows: ΔF = (F0 - F1) / F0, where F0 is the warp tear strength per unit weight of the unaged warp-knitted spacer fabric, and F1 is the warp tear strength per unit weight of the aged warp-knitted spacer fabric.

[0043] The test results of the mesh fabrics obtained in each embodiment and comparative example are shown in the table below:

[0044]

[0045] As can be seen from the table above, the warp-knitted spaced mesh fabric provided in this embodiment, after aging treatment, exhibits no abnormalities after 200,000 flexes, and the warp tear strength per unit weight of the mesh fabric is greater than 1.4 (N·m). 2 The change in warp tear strength per unit weight of the mesh fabric (ΔF) is between 15% and 30%, indicating good tear resistance. It can still maintain good strength after aging, and when applied to shoe uppers, it helps to improve the service life of the shoe upper.

[0046] The present invention has been described in detail above with reference to specific embodiments. However, the implementation of the present invention is not limited to the above-described embodiments. Those skilled in the art can make various equivalent substitutions to the present invention based on the prior art, and these substitutions all fall within the protection scope of the present invention.

Claims

1. A tear-resistant polyester yarn, characterized in that, It is mainly composed of tear-resistant polyester fibers, which are mainly prepared by melt spinning of tear-resistant particles and PET chips. The tear-resistant particles account for 6%-9% of the mass percentage of the polyester fibers. The tear-resistant particles are made from the following raw materials by weight percentage: Aluminum borate whiskers 30%-40%, Boron nitride nanosheets / microspheres account for 30%-40%, Compatibilizer 1%-2%; Remaining amount of water-soluble polyester chips.

2. A mesh fabric, characterized in that, It has the tear-resistant polyester yarn as described in claim 1.

3. The mesh fabric as described in claim 2, characterized in that, The mesh fabric is a warp-knitted mesh fabric.

4. A method for manufacturing a mesh fabric, characterized in that, The knitting is performed using a double-needle bed warp knitting machine with seven or more guide bars. The seven guide bars are arranged sequentially on the double-needle bed warp knitting machine as guide bar GB1, Jacquard guide bar JB1, Jacquard guide bar JB2, Jacquard guide bar JB3, Jacquard guide bar JB4, guide bar GB5, and guide bar GB6. Guide bars GB1, Jacquard guide bars JB1 and JB2 form the surface layer by looping in the front needle bed yarn. Jacquard guide bars JB3 and JB4 alternately form the middle layer by looping in the front and back needle bed yarns, respectively. Guide bars GB5 and GB6 form the bottom layer by looping in the back needle bed yarn. Guide bars GB1, GB5, and GB6 are all threaded with tear-resistant polyester yarn as described in claim 1.

5. The method for manufacturing the mesh fabric as described in claim 4, characterized in that, The Jacquard combs JB1 and JB2 are threaded with nylon fiber yarn, while the Jacquard combs JB3 and JB4 are threaded with polyester cationic fiber yarn.

6. The method for manufacturing the mesh fabric as described in claim 4, characterized in that, Each comb bar is threaded with yarn using a full-thread method.

7. The method for manufacturing the mesh fabric as described in claim 4, characterized in that, The weave pattern of the padding yarn in the comb GB1 is 1-0-0-0 / 0-1-1-1 / / ; The padding yarn structure of the Jacquard comb JB1 is 1-0-1-1 / 1-2-1-1 / / ; The padding yarn structure of the Jacquard comb JB2 is 1-0-1-1 / 1-2-1-1 / / ; The padding yarn structure of the Jacquard comb JB3 is 1-0-1-2 / 1-2-1-0 / / ; The padding yarn structure of the Jacquard comb JB4 is 1-0-1-2 / 1-2-1-0 / / ; The weave pattern of the padding yarn in the GB5 comb is 1-1-1-0 / 1-1-1-2 / / ; The weave pattern of the packing yarn in the GB6 comb is 1-1-1-0 / 1-1-1-2 / / .

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