A photochromic sun-protective and breathable composite fabric and its preparation method

Abstract

This invention relates to a photochromic sun-protective and breathable composite fabric and its preparation method, belonging to the field of fabric processing technology. The photochromic sun-protective and breathable composite fabric is woven from sun-protective fibers and cotton fibers using a high-density textile loom. The sun-protective fibers are obtained by combining and twisting light-blocking yarns and photochromic yarns. The raw materials for the light-blocking yarns include 12-18 parts pearl powder particles, 5-10 parts kaolin particles, 8-15 parts propolis, and 20-30 parts polyethylene particles. The raw materials for the photochromic yarns include 6-12 parts silver chloride particles, 15-30 parts benzothiophene particles, 20-35 parts phenolic resin particles, and 40-55 parts antioxidants. The addition of pearl powder particles, kaolin particles, and propolis to the light-blocking fiber yarns enhances the fabric's sun-protective properties. The synergistic effect of pearl powder particles, kaolin particles, and propolis increases the fabric's sun-protective effect. Immersing the yarn in an antioxidant solution after adding silver chloride particles and then dyeing it further increases its sun-protective performance and tensile strength.

Description

Technical Field

[0001] This invention belongs to the field of fabric processing technology, specifically relating to a photochromic sun-protective and breathable composite fabric and its preparation method. Background Technology

[0002] Typical photochromic sun-protective fabrics will change color under ultraviolet radiation, presenting a different color than in an environment without ultraviolet radiation, thus enhancing the color of clothing.

[0003] However, most light-sensitive sun-protective fabrics use a sprayed color-changing layer, so that the clothes have a color-changing effect while also having a sun-protective effect. Although the method of using a sprayed color-changing layer can achieve a good sun protection and color-changing effect, it may result in the fabric becoming thicker, with poor breathability and reduced sun protection after washing, leading to a shorter fabric life. Summary of the Invention

[0004] The purpose of this invention is to provide a photochromic sun-protective and breathable composite fabric and its preparation method in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] This invention provides a method for preparing a photochromic sun-protective and breathable composite fabric, comprising the following steps:

[0007] The propolis was dried and then ground together with pearl powder particles and white clay particles in a nano-grinding machine to obtain a mixed powder.

[0008] After mixing the mixed powder obtained in step (1) with polyethylene particles, the mixture is fed into a melt spinning machine for melt spinning to obtain light-shielding yarn.

[0009] Benzothiophene particles were placed in a container under vacuum and radiantly heated. After the benzothiophene particles melted, silver chloride particles were added and stirred to mix them thoroughly. Then, the mixture was fed into a granulator to granulate the mixture.

[0010] After mixing the mixed granules and phenolic resin particles obtained in step (3), the mixture is fed into a melt spinning machine for melt spinning to obtain a blank wire.

[0011] The filament obtained in step (4) is immersed in an antioxidant for dyeing, then removed and dried to obtain optically variable yarn.

[0012] Sunscreen fibers are obtained by combining and twisting light-blocking yarns and light-changing yarns.

[0013] By using a high-density spinning machine to blend sun-protective fibers with cotton fibers, a photochromic sun-protective and breathable composite fabric is obtained.

[0014] As a further optimization of the present invention, the raw materials for preparing the light-shielding yarn, by weight, include 12-18 parts of pearl powder particles, 5-10 parts of white clay particles, 8-15 parts of propolis and 20-30 parts of polyethylene particles; the raw materials for preparing the light-changing yarn include 6-12 parts of silver chloride particles, 15-30 parts of benzothiophene particles, 20-35 parts of phenolic resin particles and 40-55 parts of antioxidant.

[0015] As a further optimization of the present invention, the raw materials for preparing the antioxidant, by weight, include 35-45 parts of hydroquinone, 10-18 parts of citric acid and 60-80 parts of menthol solution.

[0016] As a further optimization of the present invention, the preparation process of the antioxidant is as follows: mixing hydroquinone and citric acid, and then adding them to a menthol solution and stirring to obtain the antioxidant.

[0017] As a further optimization of the present invention, the particle size of the propolis, pearl powder particles and white clay particles after grinding in step (1) is 2-5 nm.

[0018] As a further optimization of the present invention, the silver chloride particles in step (3) are subjected to nano-grinding treatment and have a particle size of 1.5-3.5 nm.

[0019] As a further optimization of the present invention, the temperature of radiation heating in step (3) is 35-40℃.

[0020] As a further optimization of the present invention, in step (4), the filament is immersed in an antioxidant for 2-3 hours and then taken out and dried.

[0021] The beneficial effects of this invention are as follows: Adding pearl powder particles and kaolin particles to the light-blocking fiber yarn, along with propolis, helps improve the sun protection performance of the fabric. The synergistic effect of pearl powder particles, kaolin particles, and propolis increases the fabric's sun protection performance. Adding silver chloride particles to the yarn, followed by dyeing with an antioxidant, increases sun protection and tensile strength. Furthermore, the addition of benzothiophene particles to the photochromic yarn causes the fabric to change color when exposed to sunlight, increasing its sun protection performance. The antioxidant also prevents the photochromic yarn from oxidizing rapidly, making the fabric durable and retaining its sun protection effect even after repeated washing. The use of sun-protective fibers and cotton fibers increases the fabric's breathability. Detailed Implementation

[0022] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] I. Materials

[0024] Unless otherwise specified, all methods used in this invention are conventional methods known to those skilled in the art, and all reagents and materials used are commercially available products.

[0025] (1) The raw materials of the antioxidant in this invention include 35-45 parts of hydroquinone, 10-18 parts of citric acid and 60-80 parts of menthol solution;

[0026] The processing procedure is as follows:

[0027] Hydroquinone and citric acid are mixed and then added to a menthol solution and stirred to obtain an antioxidant.

[0028] II. Methods

[0029] 2.1 The Influence of Blackout Yarns on the Performance of Optically Modulated Sunscreen and Breathable Composite Fabrics

[0030] (1) The preparation method of the photochromic sun-protective and breathable composite fabric is as follows:

[0031] The propolis was dried and then ground together with pearl powder particles and kaolin particles in a nano mill (the particle size of the ground propolis, pearl powder particles and kaolin particles is 3nm) to obtain a mixed powder.

[0032] After the mixed powder and polyethylene granules are mixed, they are fed into a melt spinning machine for melt spinning to produce light-shielding yarn;

[0033] Benzothiophene particles were placed in a container under vacuum and radiantly heated (at a temperature of 38°C). After the benzothiophene particles melted, silver chloride particles with a particle size of 2 nm were added and stirred to mix them thoroughly. Then, the mixture was fed into a granulator for granulation to obtain mixed granules.

[0034] After the mixed granules and phenolic resin particles are mixed, they are fed into a melt spinning machine for melt spinning to produce a pre-filament.

[0035] The filament is immersed in an antioxidant for dyeing (the filament is immersed in the antioxidant for 2.5 hours and then dried), and then dried to obtain optically variable yarn.

[0036] Sunscreen fibers are obtained by combining and twisting light-blocking yarns and light-changing yarns.

[0037] By using a high-density spinning machine to blend sun-protective fibers with cotton fibers, a photochromic sun-protective and breathable composite fabric is obtained.

[0038] The raw materials for the optically variable yarn include 8 parts silver chloride particles, 23 parts benzothiophene particles, 30 parts phenolic resin particles, and 50 parts antioxidants.

[0039] The antioxidant ingredients include 40 parts hydroquinone, 14 parts citric acid, and 70 parts menthol solution;

[0040] The raw material composition of the light-blocking yarn is shown in the table below:

[0041]

[0042] Note: "-" indicates no addition.

[0043] (2) The performance of the above fabric samples was tested using the following test methods.

[0044] ①According to GB / T 18830—2009 "Evaluation of UV protection performance of textiles", the sun protection performance of the fabric samples prepared by the method in Example 1 and the fabric samples prepared by Comparative Examples 1-3 were tested respectively.

[0045] ②According to GB / T 32614-2016, abrasion resistance tests were conducted on the fabric samples, and the number of abrasion resistance tests for Example 1 and Comparative Examples 1-3 were recorded respectively.

[0046] The results are shown in the table below:

[0047]

[0048] As can be seen from the table above, the light-blocking yarn made by adding pearl powder particles and kaolin particles showed good sun protection performance after ultraviolet performance testing. According to the comparison between Example 1 and Comparative Documents 1 and 2, the addition of pearl powder particles and kaolin particles has a good effect on the UV protection performance of the fabric. The comparison between Example 1 and Comparative Example 3 showed that the addition of propolis also has a good effect on the UV protection performance of the fabric. The test showed that when pearl powder particles, kaolin particles and propolis are added to the light-blocking fiber yarn, the addition of propolis also has a certain effect on the sun protection performance of the fabric. The synergistic use of pearl powder particles, kaolin particles and propolis increases the sun protection effect of the fabric while increasing the abrasion resistance of the fabric.

[0049] 2.2 Influence of Optically Variable Yarn on the Performance of Optically Variable Sunscreen and Breathable Composite Fabric

[0050] (1) The preparation method of the light-changing sun protection and breathable composite fabric is described in 2.1-(1), wherein the light-changing yarn described in the table below is used to replace the light-changing yarn in Example 1.

[0051] The raw material composition of optically variable yarn is shown in the table below:

[0052]

[0053] Note: "-" indicates no addition.

[0054] (2) The performance of the above fabric samples was tested using the following test methods.

[0055] ①The fabrics obtained in Examples 1-2 and Comparative Examples 4-5 were washed 50 times and then tested for sun protection performance. The sun protection performance test is referred to 2.1-(2)-①.

[0056] ② The fabrics prepared in Examples 1-2 and Comparative Examples 4-5 were washed 50 times. Then, the tensile properties of the fabric samples prepared in Examples 1-2 and Comparative Examples 4-6 were tested according to GB / T3923.2-2013 "Textiles - Tensile Properties of Fabrics - Part 2: Determination of Breaking Strength by Sampling Method".

[0057] ③ The fabrics obtained in Examples 1-2 and Comparative Examples 4-5 were tested for moisture permeability according to GB / T12704.1-2009 "Textiles - Test Methods for Moisture Permeability of Fabrics - Part 1: Moisture Absorption Method".

[0058] The results are shown in the table below:

[0059]

[0060] As can be seen from the table above, after comparing Example 1 and Example 2, Example 1 shows the best performance in both sun protection and tensile strength. This proves that the values ​​in Example 2 are the optimal values ​​among the examples. Comparing Comparative Examples 4 and 5 with Example 1, Comparative Example 4 removed silver chloride particles, which increased the UVA transmittance, resulting in an increase in UVA transmittance and a decrease in UPF value. Comparing Example 1 with Comparative Example 1, it was found that removing silver chloride particles and antioxidants significantly reduced the sun protection and tensile strength of the fabric sample. The results show that the yarn with added silver chloride particles, after being immersed in antioxidants and dyed, increases sun protection, tensile strength, and moisture permeability.

[0061] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A method for preparing a photochromic sun-protective and breathable composite fabric, characterized in that, Includes the following steps: (1) Dry the propolis and grind it together with pearl powder particles and white clay particles in a nano-grinding machine to obtain a mixed powder. (2) The mixed powder obtained in step (1) and polyethylene particles are mixed and then fed into a melt spinning machine for melt spinning to obtain light-shielding yarn. (3) Benzothiophene particles are placed in a container under vacuum and radiantly heated. After the benzothiophene particles melt, silver chloride particles are added and stirred to mix them thoroughly. Then, the mixture is put into a granulator for granulation to obtain mixed granules. (4) The mixed granules obtained in step (3) and phenolic resin particles are mixed and then fed into a melt spinning machine for melt spinning to obtain a blank wire. (5) Immerse the filament obtained in step (4) in an antioxidant for dyeing, take it out and dry it to obtain optically variable yarn; (6) Obtain sun-protective fibers by combining and twisting light-blocking yarns and light-changing yarns; (7) Use a high-density textile machine to blend sunscreen fibers with cotton fibers to obtain a photochromic sunscreen and breathable composite fabric.

2. The method for preparing a photochromic sun-protective and breathable composite fabric according to claim 1, characterized in that, By weight, the raw materials for preparing the light-shielding yarn include 12-18 parts pearl powder particles, 5-10 parts white clay particles, 8-15 parts propolis and 20-30 parts polyethylene particles; the raw materials for preparing the light-changing yarn include 6-12 parts silver chloride particles, 15-30 parts benzothiophene particles, 20-35 parts phenolic resin particles and 40-55 parts antioxidant.

3. The method for preparing a photochromic sun-protective and breathable composite fabric according to claim 2, characterized in that, The antioxidant is prepared by weight of 35-45 parts hydroquinone, 10-18 parts citric acid and 60-80 parts menthol solution.

4. The method for preparing a photochromic sun-protective and breathable composite fabric according to claim 3, characterized in that, The antioxidant is prepared by mixing hydroquinone and citric acid, then adding them to a menthol solution and stirring to obtain the antioxidant.

5. The method for preparing a photochromic sun-protective and breathable composite fabric according to claim 1, characterized in that, The particle size of the propolis, pearl powder particles and white clay particles after grinding in step (1) is 2-5 nm.

6. The method for preparing a photochromic sun-protective and breathable composite fabric according to claim 1, characterized in that, The silver chloride particles in step (3) are nano-grinding processed to have a particle size of 1.5-3.5 nm.

7. The method for preparing a photochromic sun-protective and breathable composite fabric according to claim 1, characterized in that, The temperature of radiation heating in step (3) is 35-40℃.

8. The method for preparing a photochromic sun-protective and breathable composite fabric according to claim 1, characterized in that, In step (4), the filament is immersed in an antioxidant for 2-3 hours and then removed and dried.

9. A photochromic sun-protective and breathable composite fabric, characterized in that, It is prepared by the preparation method according to any one of claims 1-8.

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