Highly abrasion resistant textile yarn and process for its production

Abstract

This invention discloses a high abrasion-resistant textile yarn and its production process, belonging to the field of textile yarn technology. The process includes the following steps: Step S1: Abrasion-resistant filament and cotton yarn are twisted together at a distance of 2-3 mm, following a Z-twist direction and a twist of 110-115 twists / 10cm on a ring spinning machine, and then wound to obtain a composite yarn; Step S2: Another abrasion-resistant filament and the composite yarn are combined at a speed of 250-255 m / min using a doubling device, and then twisted on a doubling machine following an S-twist direction and a twist of 50-55 twists / 10cm, so that the abrasion-resistant filament is tied to the composite yarn in the opposite direction, resulting in a high abrasion-resistant textile yarn. This invention uses two abrasion-resistant filaments intersecting to form a mesh structure, with cotton yarn wrapped within it as the core yarn. The resulting high abrasion-resistant textile yarn has a low twist, retaining the softness of the internal cotton yarn while significantly improving the abrasion resistance of the textile yarn.

Description

A high abrasion-resistant textile yarn and its manufacturing process Technical Field

[0001] This invention belongs to the field of textile yarn technology, specifically relating to a highly abrasion-resistant textile yarn and its production process. Background Technology

[0002] Yarn is made up of multiple fibers woven end to end, generally spun from multiple strands or a single fiber. Textile yarn may become unusable for various reasons, the most significant being abrasion. Abrasion resistance is one of the important indicators of textile yarn, affecting not only the smooth progress of the weaving process but also the abrasion resistance of the fabric. During production and weaving, when subjected to external friction, yarn is prone to loss of twist and breakage, producing fuzz, or even quickly wearing away and breaking, affecting both production efficiency and product quality. When spun into fabric, it can also lead to the loss of fabric strength and other performance characteristics, as well as affecting the fabric's appearance. Therefore, the abrasion resistance of textile yarn is an important issue that should be considered during processing.

[0003] Currently, there are three main methods to improve the abrasion resistance of textile yarns: First, using high-performance fibers for pure spinning or blending can greatly improve the abrasion resistance of the woven fabric, but the disadvantage is that the fabric's performance is relatively poor. Second, improving the yarn structure to form wrapped composite yarns, where the outer yarn of the wrapped yarn is wrapped around the outside of the core yarn, providing a strong covering effect. However, the high abrasion resistance of wrapped yarns often corresponds to high twist, making the yarn feel rougher, and the yarn's tolerance to friction from different directions varies significantly. Third, applying functional coatings to the surface of the textile yarn forms a thin film, temporarily protecting or reducing damage. However, after repeated washing, the adhesion of the finishing agent decreases, and its abrasion resistance will significantly decrease. Therefore, how to retain the softness of the yarn while improving its abrasion resistance is a pressing technical problem that needs to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide a highly abrasion-resistant textile yarn and its manufacturing process to solve the problems in the prior art.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A manufacturing process for highly abrasion-resistant textile yarn includes the following steps:

[0007] Step S1: A wear-resistant filament and cotton yarn are joined and twisted together on a ring spinning machine at a spacing of 2-3mm, in the Z-twist direction and at a twist of 110-115 twists / 10cm. After winding, they are made into composite yarn.

[0008] Step S2: The other abrasion-resistant filament and the composite yarn are coupled together at a speed of 250-255 m / min using a coupling device. Then, on a doubling machine, the yarn is twisted in the S-twist direction at a twist rate of 50-55 twists / 10cm, so that the abrasion-resistant filament is tied to the composite yarn in the opposite direction. The two abrasion-resistant filaments cross each other to form a mesh, and the cotton yarn is wrapped in it to obtain a highly abrasion-resistant textile yarn.

[0009] Furthermore, the linear density of the cotton yarn is 18.5 tex; the linear density of the abrasion-resistant filament is 38-40 dtex.

[0010] Furthermore, the wear-resistant filament is prepared by the following steps:

[0011] Step A1: After the dried polyamide 6 resin, high-density polyethylene, polyamide 66 fine powder, compatibilizer and antioxidant are added to a high-speed mixer and mixed evenly, the mixture is then transferred to a twin-screw extruder for melt extrusion to obtain a polymer melt.

[0012] Step A2: The polymer melt is melt-spun through a spinneret, and then drawn, heat-set and wound to obtain polymer filaments. The polymer filaments are subjected to cryogenic treatment for 10-12 hours, and then taken out and restored to room temperature to obtain wear-resistant filaments.

[0013] Furthermore, the mass ratio of polyamide 6 resin, high-density polyethylene, polyamide 66 fine powder, compatibilizer, and antioxidant is 15-17:5-6:2.5-3:3:0.1; blending polyamide 6 resin, high-density polyethylene, and polyamide 66 fine powder can improve the coefficient of friction and strength of the polymer melt, thereby improving the wear resistance of the polymer filament; the compatibilizer is a mixture of high-density polyethylene grafted with maleic anhydride and polyamide grafted with maleic anhydride in a mass ratio of 2:1; the antioxidant is an arbitrary blend of antioxidant 1010 and antioxidant 168.

[0014] Furthermore, the fineness of the polyamide 66 powder is 1000-1200 mesh; the high-melting-point polyamide 66 powder can be integrated with polyamide 6 after melt blending, and the molecular chains of polyamide 66 are interwoven between the molecular chains of the polyamide 6 resin matrix, which improves the strength and wear resistance of the polyamide 6 matrix.

[0015] Furthermore, the twin-screw extruder has a rotational speed of 250-300 r / min and a temperature setting of 220-245℃.

[0016] Furthermore, the cryogenic treatment temperature is -180℃ to -185℃; after cryogenic treatment at ultra-low temperatures, the spacing between molecules in the polymer filament can be shortened, and the molecular chain arrangement is more regular and dense, which increases the interaction force between molecules, improves the wear resistance of the polymer filament, and makes it less likely to generate fuzz during processing.

[0017] Furthermore, during the doubling process, the tension of the abrasion-resistant filament is 5g, and the tension of the composite yarn is 20-22g.

[0018] A highly abrasion-resistant textile yarn is produced using the above manufacturing process.

[0019] Beneficial effects:

[0020] This invention involves the melt blending of polyamide 6 resin, high-density polyethylene, and polyamide 66 fine powder. With the aid of a compatibilizer, the high-density polyethylene and polyamide 66 fine powder are uniformly distributed within the polyamide 6 resin matrix. The interlocking molecular chains prevent slippage, thereby improving the tensile strength of the polymer filament. The high-strength polyamide 66 enhances the surface hardness of the polymer filament, while the high-density polyethylene reduces the coefficient of friction, resulting in excellent wear resistance. Finally, cryogenic treatment of the polymer filament further refines the previously interlocked molecular chains, making them more regular and dense, thus improving the wear resistance and yielding wear-resistant filaments.

[0021] This invention uses cotton yarn as the core yarn. First, a wear-resistant filament is gathered and twisted onto the outside of the cotton yarn in a Z-twist direction and at a certain interval to obtain a composite yarn. Then, another wear-resistant filament is twisted onto the outside of the composite yarn in an S-twist direction. During this process, the composite yarn becomes fluffy due to untwisting. Through the mutual coordination of the first and second twisting, the two wear-resistant filaments intersect to form a mesh structure, wrapping the cotton yarn in it, resulting in a highly wear-resistant textile yarn. This type of textile yarn has a low twist, which not only retains the softness of the inner cotton yarn but also significantly improves the wear resistance of the textile yarn. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1

[0024] This embodiment provides a wear-resistant filament, which is prepared through the following steps:

[0025] Step A1: Polyamide 6 resin, high-density polyethylene, and polyamide 66 fine powder with a fineness of 1000 mesh are dried separately in a forced-air drying oven at 100℃ for 12 hours. Then, the dried polyamide 6 resin, high-density polyethylene, polyamide 66 fine powder, compatibilizer, and antioxidant are added to a high-speed mixer in a mass ratio of 15:5:2.5:3:0.1. After mixing evenly, the mixture is transferred to a twin-screw extruder and melt-extruded at a speed of 250 r / min and a temperature of 220℃ to obtain a polymer melt. The compatibilizer is high-density polyethylene grafted with maleic anhydride and polyamide grafted with maleic anhydride in a mass ratio of 2:1. The antioxidant is antioxidant 1010 and antioxidant 168 compounded in a mass ratio of 1:1.

[0026] Step A2: The polymer melt is melt-spun through a spinneret, and then drawn, heat-set and wound to obtain polymer filaments. The polymer filaments are cryogenically treated at -180℃ for 10 hours, and then taken out and restored to room temperature to obtain abrasion-resistant filaments with a linear density of 38 dtex.

[0027] Example 2

[0028] This embodiment provides a wear-resistant filament, which is prepared through the following steps:

[0029] Step A1: Polyamide 6 resin, high-density polyethylene, and polyamide 66 fine powder with a fineness of 1100 mesh are dried separately in a forced-air drying oven at 100℃ for 12 hours. Then, the dried polyamide 6 resin, high-density polyethylene, polyamide 66 fine powder, compatibilizer, and antioxidant are added to a high-speed mixer in a mass ratio of 16:5.5:2.8:3:0.1. After being mixed evenly, the mixture is transferred to a twin-screw extruder and melt-extruded at a speed of 270 r / min and a temperature of 235℃ to obtain a polymer melt. The compatibilizer is high-density polyethylene grafted with maleic anhydride and polyamide grafted with maleic anhydride in a mass ratio of 2:1. The antioxidant is antioxidant 1010 and antioxidant 168 compounded in a mass ratio of 1:1.

[0030] Step A2: The polymer melt is melt-spun through a spinneret, and then drawn, heat-set and wound to obtain polymer filaments. The polymer filaments are cryogenically treated at -185℃ for 11 hours, and then taken out and restored to room temperature to obtain wear-resistant filaments with a linear density of 39.2 dtex.

[0031] Example 3

[0032] This embodiment provides a wear-resistant filament, which is prepared through the following steps:

[0033] Step A1: Polyamide 6 resin, high-density polyethylene, and polyamide 66 fine powder with a fineness of 1200 mesh are dried separately in a forced-air drying oven at 100℃ for 12 hours. Then, the dried polyamide 6 resin, high-density polyethylene, polyamide 66 fine powder, compatibilizer, and antioxidant are added to a high-speed mixer in a mass ratio of 17:6:3:3:0.1. After mixing evenly, the mixture is transferred to a twin-screw extruder and melt-extruded at a speed of 300 r / min and a temperature of 245℃ to obtain a polymer melt. The compatibilizer is high-density polyethylene grafted with maleic anhydride and polyamide grafted with maleic anhydride in a mass ratio of 2:1. The antioxidant is antioxidant 1010 and antioxidant 168 compounded in a mass ratio of 1:1.

[0034] Step A2: The polymer melt is melt-spun through a spinneret, and then drawn, heat-set and wound to obtain polymer filaments. The polymer filaments are cryogenically treated at -185℃ for 12 hours, and then taken out and restored to room temperature to obtain wear-resistant filaments with a linear density of 40 dtex.

[0035] Comparative Example 1

[0036] Compared with Example 3, this comparative example does not contain high-density polyethylene and 1200-mesh polyamide 66 fine powder, but all other materials and steps are the same.

[0037] Comparative Example 2

[0038] Compared with Example 3, this comparative example does not undergo cryogenic treatment and directly uses polymer filaments as abrasion-resistant filaments, while the remaining steps are the same.

[0039] Example 4

[0040] This embodiment provides a highly abrasion-resistant textile yarn, which is produced through the following manufacturing process:

[0041] Step S1: A wear-resistant filament obtained in Example 1 and a cotton yarn with a linear density of 18.5 tex are brought together and twisted at a distance of 3 mm, in the Z twist direction and at a twist of 115 twists / 10 cm, and then wound into a composite yarn.

[0042] Step S2: The wear-resistant filament obtained in another example 1 and the composite yarn are combined at a speed of 250m / min through a combining device. During the combining process, the tension of the wear-resistant filament is 5g and the tension of the composite yarn is 20g. Then, the yarn is twisted in the S-twist direction and at a twist rate of 55 twists / 10cm on a doubling machine to obtain a highly wear-resistant textile yarn.

[0043] Example 5

[0044] This embodiment provides a highly abrasion-resistant textile yarn, which is produced through the following manufacturing process:

[0045] Step S1: A wear-resistant filament obtained in Example 2 and cotton yarn with a linear density of 18.5 tex are brought together and twisted at a distance of 2.5 mm, in the Z-twist direction and at a twist of 115 twists / 10 cm, and then wound into a composite yarn.

[0046] Step S2: The wear-resistant filament obtained in another example 2 and the composite yarn are combined at a speed of 255m / min through a combining device. During the combining process, the tension of the wear-resistant filament is 5g and the tension of the composite yarn is 21g. Then, the yarn is twisted in the S-twist direction at a twist rate of 50 twists / 10cm on a doubling machine to obtain a highly wear-resistant textile yarn.

[0047] Example 6

[0048] This embodiment provides a highly abrasion-resistant textile yarn, which is produced through the following manufacturing process:

[0049] Step S1: A wear-resistant filament obtained in Example 3 and a cotton yarn with a linear density of 18.5 tex are brought together and twisted at a distance of 2 mm, in the Z twist direction and at a twist of 110 twists / 10 cm, and then wound into a composite yarn.

[0050] Step S2: The wear-resistant filament obtained in another example 3 and the composite yarn are combined at a speed of 255m / min through a combining device. During the combining process, the tension of the wear-resistant filament is 5g and the tension of the composite yarn is 22g. Then, the yarn is twisted in the S-twist direction at a twist rate of 50 twists / 10cm on a doubling machine to obtain a highly wear-resistant textile yarn.

[0051] Comparative Example 3

[0052] Compared with Example 6, this comparative example uses the wear-resistant filament obtained in Comparative Example 1 to replace the wear-resistant filament obtained in Example 3, while the other raw materials and steps are the same.

[0053] Comparative Example 4

[0054] Compared with Example 6, this comparative example uses the wear-resistant filament prepared in Comparative Example 2 to replace the wear-resistant filament prepared in Example 3, while the other raw materials and steps are the same.

[0055] Comparative Example 5

[0056] Compared with Example 6, in this comparative example, the wear-resistant filament and composite yarn are twisted in the Z-twist direction in step S2, and the other steps are the same.

[0057] The textile yarns obtained in Examples 4-6 and Comparative Examples 3-5 were woven into plain weave fabric samples. The warp density of the fabric samples was 505 threads / 10cm, and the weft density was 235 threads / 10cm. The performance of the fabric samples was then tested.

[0058] The tensile strength and elongation at break of fabric samples were tested using a universal testing machine in accordance with the GB / T 3923.1-2013 standard.

[0059] The abrasion resistance of the fabric samples was tested using a Martindale abrasion tester according to GB / T 21196.1-2007 standard; the results are shown in Table 1:

[0060] Table 1

[0061]

[0062] As can be seen from the data in Table 1, the textile samples made from the yarns of Examples 4-6 exhibit higher breaking strength, breaking elongation, and abrasion resistance compared to Comparative Examples 3-5. The two twisting methods with different twist directions can significantly improve the tensile and abrasion resistance of the textile yarns. The combined use of abrasion-resistant filament raw materials and cryogenic treatment can further improve the tensile and abrasion resistance of the textile yarns.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A production process for highly abrasion-resistant textile yarn, characterized in that, Includes the following steps: Step S1: A wear-resistant filament is twisted with cotton yarn at a 2-3mm gap, following the Z-twist direction and a twist of 110-115 twists / 10cm, and then wound to obtain a composite yarn. Step S2: Another wear-resistant filament is twisted with the composite yarn using a twisting device, and then twisted on a doubling machine following the S-twist direction and a twist of 50-55 twists / 10cm, so that the wear-resistant filament is tied to the composite yarn in the opposite direction, to obtain a highly wear-resistant textile yarn. The wear-resistant filament is obtained through the following steps: Step A1: Dried polyamide 6 resin, high-density polyethylene, polyamide 66 fine powder with a fineness of 1000-1200 mesh, compatibilizer, and antioxidant are mixed in a mass ratio of 15-1... 7:5-6:2.5-3:3:0.1 is added to a high-speed mixer and mixed evenly. Then, it is transferred to a twin-screw extruder for melt extrusion to obtain a polymer melt. The compatibilizer is composed of high-density polyethylene grafted maleic anhydride and polyamide grafted maleic anhydride mixed at a mass ratio of 2:

1. The speed of the twin-screw extruder is 250-300 r / min and the temperature is 220-245℃. In step A2, the polymer melt is melt-spun through a spinneret, and then drawn, heat-set, and wound to obtain polymer filaments. The polymer filaments are subjected to cryogenic treatment for 10-12 hours at a temperature of -180℃ to -185℃. After being removed and restored to room temperature, wear-resistant filaments are obtained.

2. The production process of a high abrasion-resistant textile yarn according to claim 1, characterized in that, The linear density of the cotton yarn is 18.5 tex; the linear density of the abrasion-resistant filament is 38-40 dtex.

3. The production process of a high abrasion-resistant textile yarn according to claim 1, characterized in that, During the doubling process, the tension of the abrasion-resistant filament is 5g, and the tension of the composite yarn is 20-22g.

4. A highly abrasion-resistant textile yarn, characterized in that, It is produced by the manufacturing process described in any one of claims 1-3.

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