An ultra-high molecular weight polyethylene / polyester composite yarn and a method for preparing the same

Abstract

The present application relates to a kind of ultra-high molecular weight polyethylene / polyester composite yarn and its preparation method, the preparation method includes the following steps: step 1, with five times the powder and catechu powder preparation obtains five times the extract and catechu extract;Step 2, ultra-high molecular weight polyethylene filament is soaked in mixed solution for more than 5 hours, and modified ultra-high molecular weight polyethylene filament is obtained after drying;Step 3, modified ultra-high molecular weight polyethylene filament and polyester filament are twisted in ring-parallel twisting machine after parallel lapping, and high molecular weight polyethylene filament / polyester composite yarn is obtained.The composite effect of ultra-high molecular weight polyethylene and polyester is improved by using natural plant five times the mixed solution of catechu to treat, the obtained composite yarn improves the ability of ultra-high molecular weight polyethylene and resin coating combination, and the strength, wear resistance of yarn are further improved compared with untreated yarn.

Description

Technical Field

[0001] This invention belongs to the field of high-performance composite yarn, specifically an ultra-high molecular weight polyethylene / polyester composite yarn and its preparation method. Background Technology

[0002] Polyethylene fiber, due to its high strength and high modulus, is widely used in the production of protective clothing, while polyurethane coating is often used to improve the waterproof effect of high-performance fiber textiles. However, polyethylene fiber has limitations: weak intermolecular forces and few surface-active groups; high fineness and low specific surface area are unfavorable for the interfacial bonding between fiber and resin; its melting point is only 150℃, making it insensitive to high temperatures and unsuitable for high-temperature applications; the fiber has poor creep resistance and is easily deformed under continuous loads, making it unsuitable for use under continuous loads; its chemical properties are inert, and its surface polarity is very weak, making it difficult to apply to the production of composite materials.

[0003] In existing technologies, polyethylene fibers are usually blended with other fibers to complement each other and solve the above problems. However, the surface of ultra-high molecular weight polyethylene fibers is too smooth, resulting in poor cohesion when blended with other fibers. At the same time, static electricity is easily generated during the blending process, which affects the yarn quality. Some technologies add fillers to ultra-high molecular weight polyethylene fibers to solve problems such as wear and poor bonding. However, the addition of fillers has affinity problems and poor dispersibility, which will ultimately affect the material itself. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an ultra-high molecular weight polyethylene / polyester composite yarn and its preparation method.

[0005] A method for preparing ultra-high molecular weight polyethylene / polyester composite yarn includes the following steps:

[0006] Step 1: Prepare gallnut extract and catechin extract using gallnut powder and catechin powder respectively;

[0007] Step 2: Mix the gallnut extract and catechu extract in a certain proportion, and add a certain amount of sodium carbonate to obtain a mixed treatment solution.

[0008] Step 3: Soak the ultra-high molecular weight polyethylene filament in the mixed treatment solution for more than 5 hours, and then dry it to obtain the modified ultra-high molecular weight polyethylene filament.

[0009] Step 4: The modified ultra-high molecular weight polyethylene filament and polyester filament are combined and twisted in a ring spinning parallel twister to obtain high molecular weight polyethylene filament / polyester composite yarn.

[0010] Furthermore, the ultra-high molecular weight polyethylene filament is a small, coiled yarn after the ultra-high molecular weight polyethylene filament is wound into a large cylinder.

[0011] Furthermore, step 1 specifically involves grinding gallnut and catechin into powder, placing them in a beaker, adding distilled water, extracting under constant temperature for a period of time, and then filtering to obtain gallnut extract and catechin extract.

[0012] Furthermore, the mass ratio of gallnut and catechu to distilled water was (10-30):(200-600).

[0013] Furthermore, the extraction temperature for gallnut and catechu is 80-100℃, and the extraction time is 50-70 minutes.

[0014] Furthermore, in step 2, the mass ratio of gallnut and catechu is (1-3):1, and the ratio of the mass of sodium carbonate in grams to the volume of the mixed liquid in milliliters is (1-3):100.

[0015] Furthermore, the ratio of the volume of the mixed treatment liquid in milliliters to the weight of the ultra-high molecular weight polyethylene filament in grams is (50-100):1.

[0016] Furthermore, the linear density of the ultra-high molecular weight polyethylene filament is 20-30 tex, and the polyester filament is DTY filament with a linear density of 10-20 tex.

[0017] Furthermore, the twist rate of the twisting process is set to 200-500 twists / m, the ring spindle speed of the twisting machine is 3800-4300 r / m, and the front roller linear speed is 36-45 r / m.

[0018] An ultra-high molecular weight polyethylene / polyester composite yarn is prepared by the above method.

[0019] The beneficial effects of this invention are as follows: the materials used in the ultra-high molecular weight polyethylene / polyester composite yarn of this invention are economical and readily available, the preparation method is green and environmentally friendly, and the treatment with a mixture of natural plant gallnut and catechu improves the composite of ultra-high molecular weight polyethylene and polyester. At the same time, together with polyester, it further improves the bonding ability of ultra-high molecular weight polyethylene with resin coating, and the yarn strength and wear resistance are further improved compared with the untreated yarn. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all 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.

[0021] A method for preparing ultra-high molecular weight polyethylene / polyester composite yarn includes the following steps:

[0022] Step 1: Prepare gallnut extract and catechin extract using gallnut powder and catechin powder respectively;

[0023] Step 2: Mix the gallnut extract and catechu extract in a certain proportion, and add a certain amount of sodium carbonate to obtain a mixed treatment solution.

[0024] Step 3: Soak the ultra-high molecular weight polyethylene filament in the mixed treatment solution for more than 5 hours, and then dry it to obtain the modified ultra-high molecular weight polyethylene filament.

[0025] Step 4: The modified ultra-high molecular weight polyethylene filament and polyester filament are combined and twisted in a ring spinning parallel twister to obtain high molecular weight polyethylene filament / polyester composite yarn.

[0026] In one embodiment, the ultra-high molecular weight polyethylene filament is a small, coiled yarn after the ultra-high molecular weight polyethylene filament is wound into a large cylinder.

[0027] In one implementation method, step 1 specifically involves grinding gallnut and catechin into powder, placing them in a beaker, adding distilled water, extracting them at a constant temperature for a period of time, and then filtering to obtain gallnut extract and catechin extract.

[0028] In one implementation method, the mass ratio of gallnut and catechu to distilled water is (10-30):(200-600).

[0029] As one implementation method, the extraction temperature of gallnut and catechu is 80-100℃, and the extraction time is 50-70 minutes.

[0030] In one embodiment, the mass ratio of gallnut and catechu in step 2 is (1-3):1, and the ratio of the mass of sodium carbonate in grams to the volume of the mixed liquid in milliliters is (1-3):100.

[0031] In one embodiment, the ratio of the volume of the mixed treatment liquid in milliliters to the weight of the ultra-high molecular weight polyethylene filament in grams is (50-100):1.

[0032] In one implementation method, the ultra-high molecular weight polyethylene filament has a linear density of 20-30 tex, and the polyester filament is a DTY filament with a linear density of 10-20 tex.

[0033] In one implementation, the twist rate of the twisting process is set to 200-500 twists / m, the ring spindle speed of the twisting machine is 3800-4300 r / m, and the front roller linear speed is 36-45 r / m.

[0034] An ultra-high molecular weight polyethylene / polyester composite yarn is prepared by the above method.

[0035] The present invention will be further described below with reference to specific embodiments:

[0036] Example 1

[0037] In this embodiment, the processing method of ultra-high molecular weight polyethylene / polyester composite yarn provided by the present invention is applied to process ultra-high molecular weight polyethylene filaments. The specific operation steps are as follows: 20tex ultra-high molecular weight polyethylene filaments and 15tex polyester DTY filaments are wound into small rolls of yarn; 20g of gallnut and 20g of catechin are ground into powder and placed in a beaker with 400g of distilled water, and extracted at 100℃ for 60min. The extract is then filtered to obtain gallnut extract and catechin extract. 60ml of gallnut extract and 40ml of catechin extract are added to 2g of sodium carbonate to form a mixed treatment solution; small rolls of ultra-high molecular weight polyethylene filaments are soaked in the mixed treatment solution for 6 hours, with the mass ratio of ultra-high molecular weight polyethylene filaments to the weight of the treatment solution being 1:50. After drying, modified ultra-high molecular weight polyethylene filaments are obtained. Modified ultra-high molecular weight polyethylene (UHMWPE) filaments and polyester filaments were combined and twisted on a ring twister with a twist rate of 350 twists / m. The ring twister's rotation speed was 4000 r / m, and the front roller linear speed was 40 r / m, resulting in a UHMWPE / polyester composite yarn. The resulting composite yarn had a strength of 57.8 N and an abrasion resistance of 321 cycles. After coating the composite yarn with polyurethane, the yarn strength increased to 66.2 N, and the abrasion resistance increased to 612 cycles.

[0038] Comparative Example 1

[0039] The only difference between Comparative Example 1 and Example 1 is that the extraction of gallnut extract and catechin extract is not required, and the ultra-high molecular weight polyethylene filaments are not treated with a mixed solution. Other steps are basically the same as in Example 1 and will not be repeated here. A comparison was made between the ultra-high molecular weight polyethylene / polyester composite yarns obtained in Comparative Example 1 and Example 1. The results showed that the composite yarn obtained in Comparative Example 1 had a strength of 45.6 N and an abrasion resistance of 185 cycles. After coating the composite yarn with polyurethane, the yarn strength was 53.3 N, and the coating abrasion resistance was 491 cycles. Compared with Example 1, Comparative Example 1 showed poorer abrasion resistance and mechanical properties. This result further illustrates that surface modification treatment with gallnut and catechin can improve the interfacial properties of the composite yarn.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for preparing ultra-high molecular weight polyethylene / polyester composite yarn, characterized in that, Includes the following steps: Step 1: Prepare gallnut extract and catechin extract using gallnut powder and catechin powder respectively; Specifically, grind gallnut and catechin into powder, put them into a beaker and add distilled water, extract under constant temperature for a period of time, and filter to obtain gallnut extract and catechin extract. Step 2: Mix the gallnut extract and catechu extract in a certain proportion, and add a certain amount of sodium carbonate to obtain the mixed treatment solution; Step 3: Soak the ultra-high molecular weight polyethylene filament in the mixed treatment solution for more than 5 hours, and then dry it to obtain the modified ultra-high molecular weight polyethylene filament. Step 4: The modified ultra-high molecular weight polyethylene filament and polyester filament are combined and twisted in a ring spinning parallel twister to obtain high molecular weight polyethylene filament / polyester composite yarn.

2. The method for preparing ultra-high molecular weight polyethylene / polyester composite yarn according to claim 1, characterized in that, The ultra-high molecular weight polyethylene filament is a small, coiled yarn formed by winding a large cylinder of ultra-high molecular weight polyethylene filament.

3. The method for preparing ultra-high molecular weight polyethylene / polyester composite yarn according to claim 1, characterized in that, The mass ratio of gallnut and catechu to distilled water was (10-30):(200-600).

4. The method for preparing ultra-high molecular weight polyethylene / polyester composite yarn according to claim 1, characterized in that, The extraction temperature for gallnut and catechu is 80-100℃, and the extraction time is 50-70 minutes.

5. The method for preparing ultra-high molecular weight polyethylene / polyester composite yarn according to claim 1, characterized in that, In step 2, the mass ratio of gallnut and catechu is (1-3):1, and the ratio of the mass of sodium carbonate in grams to the volume of the mixed liquid in milliliters is (1-3):

100.

6. The method for preparing ultra-high molecular weight polyethylene / polyester composite yarn according to claim 1, characterized in that, The ratio of the volume of the mixed treatment liquid in milliliters to the weight of the ultra-high molecular weight polyethylene filament in grams is (50-100):

1.

7. The method for preparing ultra-high molecular weight polyethylene / polyester composite yarn according to claim 1, characterized in that, The linear density of ultra-high molecular weight polyethylene filament is 20-30 tex, and the polyester filament is DTY filament with a linear density of 10-20 tex.

8. The method for preparing ultra-high molecular weight polyethylene / polyester composite yarn according to claim 1, characterized in that, The twist rate for the twisting process is set to 200-500 twists / m, the ring spindle speed of the twisting machine is 3800-4300 r / m, and the front roller linear speed is 36-45 r / m.

9. A type of ultra-high molecular weight polyethylene / polyester composite yarn, characterized in that, Prepared by the method described in any one of claims 1-8.