Sunscreen viscose acetal fiber fabric and preparation method thereof
By adding a composite solution of ethylhexyl methoxycinnamate and benzophenone-3 to the viscose fiber spinning liquid, the problem of unstable fiber binding is solved, and efficient and stable sun protection effect is achieved, and the ultraviolet transmittance is in line with national standards.
Patent Information
- Application Number
- CN202510612839.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2025-07-29
AI Technical Summary
In the prior art, ethylhexyl methoxycinnamate and benzophenone-3 are difficult to bind to fibers and are easy to fall off, resulting in unstable sun protection performance of viscose fiber fabrics and limited sun protection effect when used alone.
Ethylhexyl methoxycinnamate and benzophenone-3 were dissolved in N,N-dimethylformamide solution and mixed into the spinning liquid of viscose fibers. The sunscreen viscose fiber fabric was prepared by spinning and weaving to form a stable composite sunscreen system.
The prepared sunscreen adhesive fiber fabric has excellent sun protection performance, with an ultraviolet transmittance of less than 5%. After multiple washes, the sun protection function is stable and complies with national standards.
Smart Images
Figure BDA0005400155560000061
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of fabric preparation, and particularly relates to a sunscreen viscose fiber fabric and a preparation method thereof. Background Art
[0002] In recent years, with the rapid development of outdoor sports in China, outdoor sportswear has become increasingly popular and gradually occupied the high ground in the market. As a kind of outdoor sportswear, sunscreen clothing has been pursued by beauty lovers and fitness enthusiasts. Sunscreen clothing not only has a super strong function of preventing ultraviolet rays from penetrating, but also has the characteristics of windproof, waterproof, breathable, quick-drying, and ultra-light.
[0003] Sunscreen clothing mainly achieves its goal through the anti-ultraviolet property of the fabric. The principle of anti-ultraviolet textiles to play a protective role is generally to reflect and absorb ultraviolet rays. The higher the reflectivity, the better the protective effect; the higher the absorption rate, the better the protective effect. Therefore, there are two ways for anti-ultraviolet textiles to provide protection: one is to increase the reflectivity of textile fibers or textiles to ultraviolet rays, that is, ultraviolet shielding agents; the other is to increase the absorption rate of textiles to ultraviolet rays, that is, ultraviolet absorbers.
[0004] The ultraviolet protection ability of the fabric is usually expressed by the UPF value. The UPF value, namely the ultraviolet protection coefficient, refers to the ratio of the average effect of ultraviolet radiation calculated when the skin has no protection to the average effect of ultraviolet radiation calculated when the skin has fabric protection. The higher the UPF value, the better the ultraviolet protection effect of the fabric.
[0005] Currently, improving the sunscreen efficacy of fabrics is a research hotspot. However, its key technologies are difficult to overcome or there are imperfections. Ethylhexyl methoxycinnamate and benzophenone-3 both have the function of absorbing ultraviolet rays; however, due to their stable chemical properties, it is difficult to combine them with fibers and they are prone to falling off; there are few reports on the sunscreen finishing of viscose fiber fabrics using them. Summary of the Invention
[0006] Aiming at the defects of the prior art, the first object of the present invention is to provide a sunscreen viscose fiber fabric, which has a good sunscreen efficacy.
[0007] The sunscreen viscose fiber fabric described in the present invention can be prepared by the following method: First, prepare a sunscreen agent solution; second, incorporate the sunscreen agent solution into the spinning solution of viscose fibers; finally, perform spinning and weaving to obtain the viscose fiber fabric.
[0008] The second object of the present invention is to provide a preparation method of a sunscreen viscose fiber fabric, including the following steps:
[0009] (1) Preparation of sunscreen agent solution: Ethylhexyl methoxycinnamate and benzophenone-3 were dissolved in N,N-dimethylformamide (DMF) solution to prepare a sunscreen agent solution.
[0010] Furthermore, the dosage ratio of ethylhexyl methoxycinnamate, benzophenone-3 and DMF solution was 1 g∶(2-4) g∶(100-200) mL.
[0011] (2) Preparation of viscose fiber: The sunscreen agent solution prepared in step (1) was added to the spinning solution for preparing viscose fiber, stirred evenly to obtain a spinning solution; the spinning solution was placed in a vacuum drying oven for defoaming treatment and reserved; the spinning solution was spun to obtain viscose fiber.
[0012] Preferably, the dosage ratio of the sunscreen agent solution prepared in step (1) to the spinning solution for preparing viscose fiber was 1 mL∶(100-300) mL.
[0013] (3) Preparation of fabric: The viscose fiber prepared in step (2) was spun into yarns, and the yarns were woven into a fabric, and the fabric was the sunscreen viscose fiber fabric.
[0014] The present invention has the following beneficial effects:
[0015] (1) In the present invention, both ethylhexyl methoxycinnamate and benzophenone-3 have the function of absorbing ultraviolet rays; however, due to their stable chemical properties, it is difficult to combine them with fibers and they are easy to fall off; there are few reports on the sunscreen finishing of viscose fiber fabrics. The applicant of the present invention unexpectedly found that by incorporating ethylhexyl methoxycinnamate and benzophenone-3 into the spinning solution of viscose fiber, the prepared viscose fiber has good sunscreen performance.
[0016] (2) Ethylhexyl methoxycinnamate and benzophenone-3 can form a complementarity in the absorption of UVA and UVB, so as to better enhance the sunscreen effect; when the two are used in combination, the sunscreen effect of the viscose fiber fabric is significantly higher than that of single use.
[0017] (3) The ultraviolet transmittance T(UVA)% of the sunscreen viscose fabric prepared in the present invention is all lower than 5%, meeting the national standard; after 10 washes, the sunscreen function of the sunscreen viscose fabric is still very stable and there is no obvious weakening. Detailed implementation mode
[0018] Example 1
[0019] A sunscreen viscose fiber fabric was prepared by the following method:
[0020] (1) Preparation of sunscreen agent solution: Dissolve 1 g of ethylhexyl methoxycinnamate and 3 g of benzophenone-3 in 150 mL of N,N-dimethylformamide (DMF) solution to obtain the sunscreen agent solution.
[0021] (2) Preparation of viscose fiber: Add 100 mL of the sunscreen agent solution prepared in step (1) to 20000 mL of the spinning solution for preparing viscose fiber, stir evenly to obtain the spinning solution; place the spinning solution in a vacuum drying oven for degassing treatment, and set aside; spin the spinning solution to obtain viscose fiber.
[0022] (3) Preparation of fabric: Spin the viscose fiber prepared in step (2) into yarn, and weave the yarn into fabric, and the fabric is the sunscreen viscose fiber fabric a.
[0023] Example 2
[0024] A sunscreen viscose fiber fabric is prepared by the following method:
[0025] (1) Preparation of sunscreen agent solution: Dissolve 1 g of ethylhexyl methoxycinnamate and 2 g of benzophenone-3 in 100 mL of N,N-dimethylformamide (DMF) solution to obtain the sunscreen agent solution.
[0026] (2) Preparation of viscose fiber: Add 100 mL of the sunscreen agent solution prepared in step (1) to 10000 mL of the spinning solution for preparing viscose fiber, stir evenly to obtain the spinning solution; place the spinning solution in a vacuum drying oven for degassing treatment, and set aside; spin the spinning solution to obtain viscose fiber.
[0027] (3) Preparation of fabric: Spin the viscose fiber prepared in step (2) into yarn, and weave the yarn into fabric, and the fabric is the sunscreen viscose fiber fabric b.
[0028] Example 3
[0029] A sunscreen viscose fiber fabric is prepared by the following method:
[0030] (1) Preparation of sunscreen agent solution: Dissolve 1 g of ethylhexyl methoxycinnamate and 4 g of benzophenone-3 in 200 mL of N,N-dimethylformamide (DMF) solution to obtain the sunscreen agent solution.
[0031] (2) Preparation of viscose fiber: Add 100 mL of the sunscreen agent solution prepared in step (1) to 30000 mL of the spinning solution for preparing viscose fiber, stir evenly to obtain the spinning solution; place the spinning solution in a vacuum drying oven for degassing treatment, and set aside; spin the spinning solution to obtain viscose fiber.
[0032] (3) Preparation of the fabric: The viscose fibers obtained in step (2) are spun into yarns, and the yarns are woven into a fabric, which is the sunscreen viscose fiber fabric c.
[0033] Comparative Example A
[0034] Taking Example 1 as a comparison, in this Comparative Example A, only ethylhexyl methoxycinnamate is added, that is, in step (1), "1 g of ethylhexyl methoxycinnamate and 3 g of benzophenone-3" is replaced with "1 g of ethylhexyl methoxycinnamate", and other preparation methods are carried out according to the preparation method of Example 1 to obtain the sunscreen viscose fiber fabric d.
[0035] Comparative Example B
[0036] Taking Example 1 as a comparison, in this Comparative Example B, only benzophenone-3 is added, that is, in step (1), "1 g of ethylhexyl methoxycinnamate and 3 g of benzophenone-3" is adjusted to "3 g of benzophenone-3", and other preparation methods are carried out according to the preparation method of Example 1 to obtain the sunscreen viscose fiber fabric e.
[0037] Comparative Example C
[0038] Taking Example 1 as a comparison, in this Comparative Example C, the dosage of the sunscreen agent solution is reduced, that is, in step (2), "100 mL of the sunscreen agent solution obtained in step (1)" is adjusted to "10 mL of the sunscreen agent solution obtained in step (1)", and other preparation methods are carried out according to the preparation method of Example 1 to obtain the sunscreen viscose fiber fabric f.
[0039] Performance evaluation test:
[0040] Select the sunscreen viscose fiber fabrics a, b, c, d, e, and f prepared in the above specific Examples 1 to 3 and Comparative Examples A to C of the present invention. The fabric sunscreen function test refers to GB / T 17032-1997 "Test Method for Ultraviolet Transmittance of Fabrics", and the ultraviolet transmittance T (%) is the evaluation index of the sunscreen function. The definition of the ultraviolet transmittance T (%) is: the ratio of the ultraviolet radiation intensity with the specimen to the radiation intensity without the specimen, and T is calculated as follows:
[0041] T = (I1 / I0) × 100%
[0042] In the formula: I0—the ultraviolet radiation intensity without the specimen; I1—the ultraviolet radiation intensity with the specimen.
[0043] The experimental instrument used was a UV-Vis spectrometer Lambda 35. The sample preparation method was as follows: Take the fabric from the dry and flat part at least 2 cm away from the edge of the fabric, and cut it into a size of 60 mm × 60 mm. The experimental steps were as follows: Before testing, first set the instrument parameters. Set the wavelength scanning range to 200 - 400 nm, set the scanning wavelength interval to 1 nm, set the test speed to high speed, and set the test option to transmittance T%. After setting the instrument parameters, place the sample holder in the instrument without clamping the sample to zero the instrument. When the T% displayed in the transmittance column is 100%, it indicates that the instrument has been calibrated. Then, place the sample to be tested for testing. The test results are shown in Table 1 below:
[0044] Table 1
[0045]
[0046] The Chinese national standard believes that textiles with a T(UVA)% lower than 5% can be called "UV protection products". It can be seen from Table 1 that by comparing the UV transmittance of the sunscreen viscose fabrics a, b, c, d, e, and f prepared in Examples 1 - 3 and Comparative Examples A - C, it can be seen that the T(UVA)% of the sunscreen viscose fabrics prepared in Examples 1 - 3 are all lower than 5%, meeting the national standard; Examples 1 - 3 are significantly superior to Comparative Examples A - C in terms of sun protection indicators; after 10 washes, the sun protection function of the sunscreen viscose fabric is still very stable and there is no obvious weakening. The performance evaluation test results show that the simultaneous addition of ethylhexyl methoxycinnamate and benzophenone-3 and the appropriate dosage of the sunscreen agent solution have important effects on the sun protection function of the viscose fabric.
Claims
1. A preparation method of a sunscreen viscose fiber fabric, characterized in that, The preparation method comprises the following steps: (1) Preparation of the sunscreen solution: Dissolve ethylhexyl methoxycinnamate and benzophenone-3 in N,N-dimethylformamide (DMF) solution to obtain the sunscreen solution; (2) Preparation of viscose fiber: Add the sunscreen solution prepared in step (1) to the spinning solution for preparing viscose fiber, stir evenly to obtain the spinning solution; Place the spinning solution in a vacuum drying oven for degassing treatment and set aside; Spin the spinning solution to obtain viscose fiber; (3) Preparation of the fabric: Spin the viscose fiber prepared in step (2) into yarns, and weave the yarns into a fabric, which is the sunscreen viscose fiber fabric.
2. The preparation method of a sunscreen viscose fiber fabric according to claim 1, characterized in that, In step (1), the dosage ratio of ethylhexyl methoxycinnamate, benzophenone-3 and DMF solution is 1 g∶(2-4) g∶(100-200) mL.
3. The preparation method of a sunscreen viscose fiber fabric according to claim 1, characterized in that, In step (2), the dosage ratio of the sunscreen solution prepared in step (1) to the spinning solution for preparing viscose fiber is 1 mL∶(100-300) mL.
4. A sun-proof viscose fiber fabric, characterized in that: Prepared by the method according to any one of claims 1 to 3.