Mildew-proof polyester thread and preparation method thereof

Abstract

The invention discloses a mildewproof polyester thread and a preparation method thereof, and belongs to the technical field of polyester thread production, GB / TiO2 particles are added into polyester fiber raw materials to prepare modified polyester fibers, and the mildewproof polyester thread is obtained through bundling, winding, thread twisting and finished product treatment in sequence. Wherein the GB / TiO2 particles are prepared by loading ginkgolide B on mesoporous titanium dioxide, the active component of the ginkgolide B is protected by titanium dioxide, the activity of the ginkgolide B in the spinning process is maintained, the mildew-proof performance of the polyester thread is improved through the synergistic effect of titanium dioxide and ginkgolide B, and the ultraviolet resistance and flame retardance of the polyester thread can be improved by adding titanium dioxide. Therefore, the polyester thread has excellent comprehensive performance.

Description

Technical Field

[0001] The invention belongs to the technical field of polyester thread production, and specifically relates to a mildew-proof polyester thread and a preparation method thereof. Background Art

[0002] Sewing thread is the thread needed for sewing knitted clothing products. Sewing thread can be divided into three categories according to the raw materials: natural fiber sewing thread, synthetic fiber sewing thread and mixed sewing thread. With the development of polyester industry, more and more polyester sewing threads are produced. The quality of sewing thread is closely related to the appearance, quality, production efficiency, sales, service life, etc. of clothing sewing.

[0003] Polyester is a cheap synthetic fiber with simple preparation process. Polyester thread is produced from high-strength and low-elongation polyester raw materials. It is gradually being respected by the market due to its high strength, good elasticity, easy washing and quick drying. Polyester raw materials are the most resistant to friction, dry cleaning, stone washing, bleaching and other detergents among all materials. Its low elongation and low expansion rate ensure excellent sewing properties. At the same time, it has good looping performance. The sewing thread is very stable when dealing with changes in different forces. It is very suitable for sewing shoes, professional clothing, professional equipment, leather furniture, and leather accessories.

[0004] However, in the dyeing and finishing process of polyester, the use of various auxiliaries and finishing agents can provide nutrients for microorganisms. When the temperature and humidity are suitable for growth, mold and other microorganisms will grow and multiply on textiles in large quantities, which will not only threaten people's health, but also may cause major medical accidents. Since polyester thread has a low melting point and is easy to melt, the increase in needle temperature during high-speed sewing will cause the polyester thread needle hole to be blocked and the thread to break, which is not conducive to the efficient production of polyester thread in clothing sewing. Summary of the invention

[0005] The purpose of the present invention is to provide a mildew-proof polyester thread and a preparation method thereof, so as to improve the mildew-proof performance of the polyester thread.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] The present invention provides a method for preparing a mildew-proof polyester thread, comprising the following steps:

[0008] S1. preparing modified polyester fiber: mixing PET chips and GB / TiO2 particles, adding a dispersant and an antioxidant, mixing and spinning to obtain modified polyester fiber;

[0009] S2, bundling: the modified polyester fibers are gathered into fiber bundles in a bundling device;

[0010] S3, winding: the fiber bundle is oiled and then subjected to hot roller drawing, and fiber yarn is obtained after winding;

[0011] S4, twisting: twisting the fiber yarn on a twisting machine to obtain a semi-finished polyester yarn;

[0012] S5, finished product: the semi-finished polyester yarn is sequentially subjected to post-impregnation treatment, shaping treatment and dyeing treatment to obtain the finished polyester yarn.

[0013] Furthermore, the preparation of the GB / TiO2 particles is as follows:

[0014] Mesoporous titanium dioxide is added to the ethanol solution for ultrasonic dispersion, and then the ginkgolide B solution is added to obtain a mixed solution, which is stirred evenly, centrifuged and then vacuum dried, washed, filtered and dried to obtain GB / TiO2 particles.

[0015] Ginkgolide B can destroy the mitochondrial structure of Aspergillus niger and has an antifungal effect against Aspergillus niger.

[0016] Furthermore, the concentration of the ethanol solution is 20wt%.

[0017] Furthermore, the concentration of mesoporous titanium dioxide in the mixed solution is 2 wt %.

[0018] Furthermore, the Ginkgolide B solution is a mixture of Ginkgolide B and anhydrous ethanol, and the concentration of Ginkgolide B in the Ginkgolide B solution is 10-20 mg / mL.

[0019] Furthermore, the volume proportion of the ginkgolide B solution added to the mixed solution is 30%.

[0020] Furthermore, the uniform stirring time is 6 hours, the vacuum drying temperature is 80° C., and the vacuum drying time is 12 hours.

[0021] Furthermore, the dispersant is polyethylene wax, and the antioxidant is antioxidant 1010.

[0022] Furthermore, the mass ratio of the GB / TiO2 particles to the PET slices is 2-5:50; the mass ratio of the dispersant to the PET slices is 1-2:100, and the mass ratio of the antioxidant to the PET slices is 0.5-1:100.

[0023] Furthermore, the impregnation agent of the impregnation post-treatment is KH570. KH570 can improve the hydrophobicity and flame retardancy of the polyester thread.

[0024] The present invention also provides a mildew-proof polyester thread prepared by the above-mentioned preparation method, wherein the linear density of the mildew-proof polyester thread is 19.7×2tex.

[0025] Beneficial effects of the present invention:

[0026] The present invention uses mesoporous titanium dioxide to load the anti-mildew active component ginkgolide B, which is added to a polyester fiber raw material for mixed spinning to prepare a polyester thread. On the one hand, the mesoporous titanium dioxide is used to protect the ginkgolide B to prevent the active component from being carbonized and inactivated during the melt spinning process. On the other hand, the titanium dioxide can absorb ultraviolet rays to improve the anti-ultraviolet performance of the polyester. Titanium dioxide can generate photogenerated electrons and holes under the induction of ultraviolet light. The photogenerated holes contact with the air to generate active oxygen to destroy the cell membrane, further promoting the ginkgolide B to enter the mold cell and causing mitochondrial structure damage. The synergistic effect of titanium dioxide and ginkgolide B can improve the anti-mildew performance of the polyester thread, and the excellent stability of titanium dioxide can improve the flame retardant performance of the polyester. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example 1

[0029] Preparation of GB / TiO2 particles:

[0030] Mesoporous titanium dioxide was added to a 20wt% ethanol solution, and after ultrasonic dispersion for 30 minutes, a 30% by volume solution of ginkgolide B was added thereto to obtain a mixed solution, in which the concentration of mesoporous titanium dioxide was 2wt%. The ginkgolide B solution was prepared by mixing ginkgolide B and anhydrous ethanol, wherein the concentration of ginkgolide B was 10mg / mL. The mixed solution was stirred for 6 hours and then mixed evenly, centrifuged to remove the liquid, and then vacuum dried at 80°C for 12 hours, washed with deionized water to remove impurities, filtered and dried to obtain GB / TiO2 particles.

[0031] Preparation of polyester thread:

[0032] S1. Preparation of modified polyester fiber: PET chips and GB / TiO2 particles are mixed, polyethylene wax and antioxidant 1010 are added, wherein the mass ratio of GB / TiO2 particles to PET chips is 2:50, the mass ratio of dispersant to PET chips is 1:100, and the mass ratio of antioxidant to PET chips is 1:100. After mixing, the mixture is spun by a melt spinning machine to obtain modified polyester fiber;

[0033] S2, bundling: the modified polyester fibers are gathered into fiber bundles in a bundling device;

[0034] S3, winding: the fiber bundle is oiled and then subjected to hot roller drawing, and fiber yarn is obtained after winding;

[0035] S4, twisting: twisting the fiber yarn on a twisting machine to obtain a semi-finished polyester yarn;

[0036] S5. Finished product: The semi-finished polyester yarn is sequentially treated with KH570 impregnation, setting and dyeing to obtain a finished polyester yarn with a linear density of 19.7×2tex.

[0037] Example 2

[0038] The difference from Example 1 is that in the process of preparing polyester yarn, the mass ratio of GB / TiO2 particles and PET chips is adjusted to 4:50, and the other steps are the same as Example 1.

[0039] Example 3

[0040] The difference from Example 1 is that in the process of preparing polyester yarn, the mass ratio of GB / TiO2 particles and PET chips is adjusted to 5:50, and the other steps are the same as Example 1.

[0041] Example 4

[0042] The difference from Example 1 is that the concentration of ginkgolide B in the ginkgolide B solution is 15 mg / mL when preparing GB / TiO2 particles, and the other steps are the same as Example 1.

[0043] Example 5

[0044] The difference from Example 1 is that the concentration of ginkgolide B in the ginkgolide B solution is 20 mg / mL when preparing GB / TiO2 particles, and the other steps are the same as Example 1.

[0045] Example 6

[0046] The difference from Example 1 is that in the polyester yarn process, the mass ratio of the dispersant to the PET chips is 1.5:100, the mass ratio of the antioxidant to the PET chips is 0.8:100, and the other steps are the same as in Example 1.

[0047] Example 7

[0048] The difference from Example 1 is that in the polyester yarn process, the mass ratio of the dispersant to the PET chips is 2:100, the mass ratio of the antioxidant to the PET chips is 0.5:100, and the other steps are the same as in Example 1.

[0049] Comparative Example 1

[0050] The difference from Example 1 is that GB / TiO2 particles are not added in the preparation of polyester yarn, and the other steps are the same as Example 1.

[0051] Comparative Example 2

[0052] The difference from Example 1 is that mesoporous titanium dioxide is used to replace GB / TiO2 particles in the preparation of polyester yarn, and the other steps are the same as Example 1.

[0053] Comparative Example 3

[0054] The difference from Example 1 is that Ginkgolide B is directly added in the preparation of the polyester yarn, and the other steps are the same as Example 1.

[0055] Preparation of polyester thread:

[0056] S1. Preparation of modified polyester fiber: PET chips and ginkgolide B are mixed, polyethylene wax and antioxidant 1010 are added, wherein the mass ratio of ginkgolide B to PET chips is 2:50, the mass ratio of dispersant to PET chips is 1:100, and the mass ratio of antioxidant to PET chips is 1:100. After mixing, the mixture is spun by a melt spinning machine to obtain modified polyester fiber;

[0057] S2, bundling: the modified polyester fibers are gathered into fiber bundles in a bundling device;

[0058] S3, winding: the fiber bundle is oiled and then subjected to hot roller drawing, and fiber yarn is obtained after winding;

[0059] S4, twisting: twisting the fiber yarn on a twisting machine to obtain a semi-finished polyester yarn;

[0060] S5. Finished product: The semi-finished polyester yarn is sequentially treated with KH570 impregnation, setting and dyeing to obtain a finished polyester yarn with a linear density of 19.7×2tex.

[0061] Performance tests were performed on Examples 1 to 7 and Comparative Examples 1 to 3, and the results are shown in Table 1.

[0062] Anti-melt droplet performance test: ignite with the same fire source in the same environment, observe the number of melt droplets per unit time (1min) of the polyester fiber bundle and the anti-melt droplet polyester fiber bundle, and measure multiple times to get the average value.

[0063] Aspergillus niger inhibition rate test: refer to the standard test of "GB / T 20944.2-2007 Evaluation of antibacterial properties of textiles Part 2: Absorption method", and the strain used is Aspergillus niger.

[0064] Breaking strength retention rate: refer to the standard test of "GB / T 31899-2015 Textile Weathering Resistance Test UV Exposure", use the test condition 1 listed in Table 1 in 7.2 to treat the polyester thread, and test the breaking strength of the polyester thread before and after treatment to obtain the breaking strength retention rate.

[0065] Flame retardant performance: tested by oxygen index testing machine, the test method refers to the standard "GB / T 5454-1997 Textile Combustion Performance Test Oxygen Index Method".

[0066] Table 1

[0067] Example Aspergillus niger inhibition rate % Retention rate of breaking strength % Limiting oxygen index % Example 1 96 88 27.1 Example 2 99 93 28.0 Example 3 99 95 28.5 Example 4 98 86 26.9 Example 5 99 85 26.8 Example 6 97 90 27.3 Example 7 97 91 27.5 Comparative Example 1 / 69 20.8 Comparative Example 2 32 94 27.4 Comparative Example 3 47 68 27.2

[0068] It can be seen from Table 1 that in Examples 1-3, the greater the proportion of GB / TiO2 particles in the polyester yarn raw material, the better its mildew resistance, UV resistance and flame retardancy, and compared with Comparative Example 1, its performance improvement is relatively large. Combined with the results of Comparative Examples 2 and 3, titanium dioxide and ginkgolide B both have certain mildew resistance, but their effects are obviously not as good as those of Example 1 when used alone. In Examples 4 and 5, increasing the concentration of ginkgolide B can increase the loading amount on mesoporous titanium dioxide and improve mildew resistance, but when the concentration is too high, the loading amount reaches the limit and the mildew resistance cannot be further improved.

[0069] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0070] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing mildew-proof polyester thread, characterized in that: The following steps are involved: S1. preparing modified polyester fiber: mixing PET chips and GB / TiO2 particles, adding a dispersant and an antioxidant, mixing and spinning to obtain modified polyester fiber; S2, bundling: the modified polyester fibers are gathered into fiber bundles in a bundling device; S3, winding: the fiber bundle is oiled and then subjected to hot roller drawing, and fiber yarn is obtained after winding; S4, twisting: twisting the fiber yarn on a twisting machine to obtain a semi-finished polyester yarn; S5, finished product: the semi-finished polyester yarn is sequentially subjected to post-impregnation treatment, shaping treatment and dyeing treatment to obtain the finished polyester yarn.

2. The method for preparing a mildew-proof polyester thread according to claim 1, characterized in that: The preparation of the GB / TiO2 particles is as follows: Mesoporous titanium dioxide is added to the ethanol solution for ultrasonic dispersion, and then the ginkgolide B solution is added to obtain a mixed solution, which is stirred evenly, centrifuged and then vacuum dried, washed, filtered and dried to obtain GB / TiO2 particles.

3. The method for preparing a mildew-proof polyester thread according to claim 2, characterized in that: The concentration of the ethanol solution is 20 wt %.

4. The method for preparing a mildew-proof polyester thread according to claim 2, characterized in that: The concentration of mesoporous titanium dioxide in the mixed solution is 2 wt %.

5. The method for preparing a mildew-proof polyester thread according to claim 2, characterized in that: The ginkgolide B solution is a mixture of ginkgolide B and anhydrous ethanol; The concentration of ginkgolide B in the ginkgolide B solution is 10-20 mg / mL.

6. The method for preparing a mildew-proof polyester thread according to claim 2, characterized in that: The volume proportion of the ginkgolide B solution added to the mixed solution is 30%.

7. The method for preparing a mildew-proof polyester thread according to claim 2, characterized in that: The uniform stirring time is 6 hours, the vacuum drying temperature is 80° C., and the vacuum drying time is 12 hours.

8. The method for preparing a mildew-proof polyester thread according to claim 1, characterized in that: The dispersant is polyethylene wax, and the antioxidant is antioxidant 1010.

9. The method for preparing a mildew-proof polyester thread according to claim 1, characterized in that: The mass ratio of the GB / TiO2 particles to the PET slices is 2-5:50; the mass ratio of the dispersant to the PET slices is 1-2:100, and the mass ratio of the antioxidant to the PET slices is 0.5-1:100; The impregnation reagent for the post-impregnation treatment is KH570.

10. A mildew-proof polyester yarn prepared by the method according to any one of claims 1 to 9, characterized in that: The linear density of the mildew-proof polyester thread is 19.7×2tex.