Analysis of waterproof performance of PTFE film composite terry cloth fabric
1. Introduction
PTFE (Polytetrafluoroethylene) film is a polymer material with excellent chemical stability and heat resistance. Its microporous structure makes it have excellent waterproof and breathable properties. In recent years, PTFE films have been widely used in the field of functional textiles, especially in outdoor clothing, sports equipment and household products. Combining PTFE film with a terry cloth can significantly improve the waterproof performance of the terry cloth while maintaining its softness and comfort.
This article will conduct a detailed analysis of the waterproof performance of PTFE film composite terry cloth fabric from the aspects of the basic characteristics, composite process, waterproof mechanism and practical application effects of PTFE film.
2. Basic Characteristics of PTFE Film
The main features of PTFE membrane include:
- Hyperophobicity: PTFE itself is a highly hydrophobic material with extremely low surface energy and difficult for water droplets to adhere.
- Micropore Structure: PTFE films prepared by stretching process have a unique micropore structure, and the pore size is usually between 0.1 and 1.0 microns. This structure can block the penetration of liquid water while allowing water vapor to pass through, achieving waterproof and breathable effect.
- Chemical stability: PTFE films are resistant to acid and alkali corrosion, are not easy to age, and have a long service life.
- Mechanical Strength: PTFE film has good flexibility and tear resistance, and is suitable for composite with textiles.
3. Technology of PTFE film composite towel cloth
The composite of PTFE film and terry cloth usually uses the following process:
- Hot Pressing Compound: Adhesive PTFE film and terry cloth together through high temperature and high pressure. This method requires good temperature and pressure control to avoid damage to the PTFE film or affecting the feel of the towel cloth.
- Adhesive Compound: Use a special environmentally friendly adhesive to bond the PTFE film to the terry cloth. This method is suitable for heat-sensitive terry cloth materials.
- Laminated composite: Add a functional intermediate layer (such as nonwoven or mesh) between the PTFE film and the terry cloth to enhance the overall performance of the composite material.
The composite terry cloth fabric retains the hairThe softness and hygroscopicity of the turban also obtain the waterproof and breathable function of the PTFE film.
4. Waterproofing mechanism
The waterproof performance of PTFE film composite towel cloth is mainly based on the following principles:
- Micropore barrier effect: The diameter of the micropores of the PTFE film is much smaller than the size of the water droplet (the small diameter of the water droplet is about 20 microns), so liquid water cannot penetrate the film, thereby achieving waterproofing effect.
- Hyperophobicity: The surface of the PTFE film is naturally hydrophobic, and water droplets will form a spherical roll on its surface, further preventing moisture from infiltration.
- Breathability: Although the PTFE film can block liquid water, its microporous structure allows water vapor molecules to pass through, ensuring the breathability of the composite fabric.
5. Waterproof performance test
To evaluate the waterproof performance of PTFE film composite towel cloth, the following test methods are usually used:
- Hydrostatic pressure test: Measure the height of the water column the fabric is subject to to evaluate its waterproofing ability. Generally speaking, the hydrostatic pressure of PTFE film composite towel cloth can reach more than 3000mm, meeting the needs of most application scenarios.
- Rain test: Simulate the actual use environment and observe the waterproof performance of the fabric under continuous rain conditions.
- Moisture permeability test: Measure the amount of water vapor passed through the fabric per unit time to verify its breathable performance.
The test results show that PTFE film composite terry cloth can provide a comfortable wearing experience while maintaining good waterproof performance.
6. Practical Application Effect
PTFE film composite terry cloth fabric has been widely used in many fields due to its excellent waterproofing performance:
- Outdoor Products: Used to make tents, sleeping bags, raincoats, etc., providing reliable waterproof protection.
- Home Textiles: used in sofa covers, bed sheets, curtains, etc. to prevent damage caused by liquid splashing.
- Medical Field: used in surgical gowns, protective suits, etc., which can not only effectively isolate liquids, but also ensure the comfort of medical staff.
In addition, the fabric is easy to clean,Antibacterial and other characteristics further enhance their practical value.
7. Conclusion
PTFE film composite terry cloth fabric becomes a high-performance functional textile material by combining the waterproof and breathable properties of PTFE film and the softness and comfort of the terry cloth. Its waterproof performance mainly depends on the micropore barrier effect and hydrophobicity of PTFE membrane, and can perform well in a variety of application scenarios. In the future, with the continuous improvement of composite processes and the research and development of new materials, PTFE film composite towel cloth is expected to play a greater role in more fields.
References
- Li Hua, Wang Qiang. (2020). Research on the application of PTFE film in functional textiles. Advances in textile technology, 32(5), 45-50.
- Zhang Ming, Liu Yang. (2019). Development and application of waterproof and breathable composite fabrics. Modern Textile Technology, 28(3), 78-83.
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