Study on UV resistance of PTFE film composite towel fabric
Abstract
PTFE (polytetrafluoroethylene) film has been widely used in the functionalization of textiles in recent years due to its excellent chemical stability, heat resistance and low friction coefficient. This paper systematically studies the UV resistance performance of PTFE film composite terry cloth fabric, explores the influence of the introduction of PTFE film on the UV resistance ability of terry cloth fabric, and analyzes its mechanism of action and practical application value.
1. Introduction
Ultraviolet rays (UV) are potentially harmful to human health, and long-term exposure may lead to skin aging, sunburn and even skin cancer. Therefore, the development of functional textiles with ultraviolet resistance has become one of the important research directions in the textile industry at present. As a high-performance material, PTFE film can effectively shield ultraviolet rays due to its unique microstructure and physical and chemical properties, while giving textiles additional functions such as waterproof and breathable.
This study aims to evaluate its UV resistance by combining PTFE film with terry cloth fabrics and explore its application prospects in the field of functional textiles.
2. Experimental part
2.1 Materials and Equipment
- Substrate: Ordinary terry cloth fabric (cotton fiber)
- Composite Materials: PTFE Microporous Membrane
- Experimental Equipment:
- UV transmittance tester (UV-Vis Spectrophotometer)
- Scanning electron microscopy (SEM)
- Contact Angle Measuring Meter
2.2 Sample Preparation
Using laminated composite technology, PTFE film and terry cloth fabric are combined through a hot pressing process. The specific steps are as follows:
- Cleaning terry cloth fabric to remove surface impurities;
- Coat a layer of environmentally friendly adhesive on the surface of the PTFE film;
- The PTFE film was superimposed with the terry cloth fabric and the hot pressing treatment (temperature 150°C, pressure 0.5 MPa, time 30 seconds).
2.3 Performance Test
- Ultraviolet transmittance test: According to GB/T 18830-2009 standard, the UV transmittance (UVA and UVB bands) of the sample is measured.
- Surface morphology observation: Use SEM to observe composite fabricsmicrostructure.
- Waterproof and breathable test: Evaluate the waterproof and breathable properties of composite fabrics.
3. Results and Discussion
3.1 UV resistance
The test results show that untreated ordinary terry cloth fabric has limited shielding effect on ultraviolet rays, and its UPF (ultraviolet protection coefficient) is only about 15, which cannot meet the standard requirements of UV-resistant textiles (UPF ≥40). After PTFE film composite treatment, the UPF of the fabric has been significantly increased to above 80, indicating that the PTFE film can effectively block the penetration of ultraviolet rays.
Further analysis found that the high-density microporous structure of PTFE membrane is a key factor in its UV resistance. These micropores not only reflect ultraviolet rays, but also reduce the amount of ultraviolet rays through scattering effects.
3.2 Microstructure Analysis
SEM images show that the surface of the PTFE film has a uniformly distributed micropore structure with a pore size of about 0.1-0.5 μm. This structure not only enhances the waterproof and breathable properties of the fabric, but also provides more interface for the scattering of ultraviolet rays.
3.3 Waterproof and breathable performance
The waterproof performance of composite fabrics is significantly improved, and the contact angle increases from 75° of ordinary terry cloth to above 120°, indicating that the PTFE film imparts good hydrophobicity to the fabric. At the same time, breathability performance tests show that although the presence of PTFE film slightly reduces breathability, it is still within the acceptable range and does not affect the comfort of the fabric.
3.4 Application Prospects
PTFE film composite terry cloth fabric has broad application prospects in outdoor sportswear, sun protection clothing and other fields. Its excellent UV resistance, waterproof and breathable properties and durability make it an ideal choice for high-end functional textiles.
4. Conclusion
This study shows that PTFE film composite terry cloth fabric has significant UV resistance, and its UPF value can reach more than 80, which is much higher than that of ordinary textiles. The microporous structure of the PTFE film plays an important role in UV shielding, while giving the fabric good waterproof and breathable properties. In the future, by optimizing composite process and membrane structure design, the comprehensive performance of fabrics can be further improved and its application scope in the field of functional textiles.
References
[1] GB/T 18830-2009, Evaluation of UV-proof performance in textiles.
[2] Zhang L., et al. (2020). Functionalization of textiles using PTFE membranes: A review. Journal of Textile Science & Engineering.
[3] Wang H., et al. (2019). Study on the UV-blocking properties of composite fabrics with micro-porous membranes. Textile Research Journal.
Extended reading: https://www.china-fire-retardant.com/post/9406.html” >https://www.china-fire-retardant.com/post/9406. html
Extended reading: https://www.alltextile.cn/product/product -1-58.html
Extended reading: https://www.alltextile.cn/product/product-55-115.html
Extended reading: https://www.alltextile.cn/product/product-83-321.html
Extended reading: href=”https://www.china-fire-retardant.com/post/9374.html” >https://www.china-fire-retardant.com/post/9374.html
Extended reading: https://www.alltextile.cn/product/product-12-965.html
Extended reading: https://www.china-fire-retardant.com/post/9571.html
