Study on the thermal and humidity comfort of PTFE film composite terry cloth fabric
Abstract
PTFE (Polytetrafluoroethylene) film has been widely used in functional textiles in recent years due to its excellent waterproof and breathable properties. Combining PTFE film with terry cloth can significantly improve the waterproof, windproof and breathable properties of the fabric while retaining the soft and comfortable touch of the terry cloth. This paper studies the thermal and moisture comfort of PTFE film composite terry cloth fabric through experiments, analyzes its performance under different environmental conditions, and discusses its application potential in sportswear, outdoor clothing and other fields.
1. Introduction
Hot and humidity comfort is one of the important indicators for evaluating the wearing experience of textiles, especially for functional fabrics. PTFE film has a microporous structure that can enable water vapor to pass through and block liquid water, so it is widely used to make waterproof and breathable fabrics. However, further research is still needed to see whether the thermal and moisture comfort of PTFE film will be affected after being combined with a terry cloth and how to optimize its performance.
The purpose of this study is to:
- Test the basic physical properties of PTFE film composite terry cloth fabric;
- Analyze its heat and humidity transfer characteristics under different humidity and temperature conditions;
- Explore the key factors affecting thermal and humidity comfort.
2. Experimental method
2.1 Sample Preparation
- Materials: Commercially available PTFE film (thickness about 25μm, pore size 0.2μm) and cotton terry cloth (g of weight 280g/m²).
- Composite process: Use hot pressing composite technology to bond the PTFE film to one side of the terry cloth to form a composite fabric.
- Control group: Pure cotton terry cloth as a comparison sample.
2.2 Performance Test
- Breathability: Use a breathable meter to measure the flow rate of air passing through the fabric per unit time.
- Moisture permeability: Use evaporation method to test water vapor transmittance.
- Hydroscope: Determine the fabric’s absorption capacity to liquid water.
- Thermal resistance and moisture resistance: Use skin models to simulate the sweating state of the human body and test the heat and moisture transfer performance of the fabric.
2.3 Environmental Conditions
The experiment was performed under the following conditions:
- Temperature range: 15°C~35°C
- Relative humidity range: 30%~90%
3. Results and Discussion
3.1 Basic physical properties
- Breathability: The breathability of PTFE film composite terry cloth is slightly lower than that of pure cotton terry cloth, but it can still meet daily wear needs.
- Moisture permeability: PTFE film composite fabric shows significant water vapor permeability, with moisture permeability up to 5000g/(m²·24h), far higher than ordinary waterproof fabrics.
- Hydroscopicity: Due to the existence of PTFE film, the absorption capacity of composite fabrics to liquid water has decreased, but its rapid moisture-induced function makes up for this defect.
3.2 Heat and humidity transfer characteristics
- In high temperature and high humidity environment, the PTFE film composite towel cloth has a low wet resistance, which can effectively discharge sweat from human body and keep the skin dry.
- In low temperature and low humidity environments, the thermal resistance of composite fabrics is moderate, which can not only provide a certain warmth effect without causing a stuffy feeling.
3.3 Heat and humidity comfort evaluation
Through subjective evaluation experiments, it was found that PTFE membrane composite turban showed good thermal and moisture comfort in sports and outdoor activities. Especially during strenuous exercise, its rapid sweating and breathable properties are significantly better than ordinary terry cloths.
4. Key factors affecting heat and humidity comfort
- Pore size and thickness of PTFE film: The larger the pore size and thinner the thickness, the better the breathability and moisture permeability, but the waterproof performance may be reduced.
- Composite process parameters: The hot pressing temperature and pressure will affect the bonding strength and breathability of the PTFE film and the towel cloth.
- Environmental Conditions: Changes in temperature and humidity have a significant impact on the heat and humidity transfer performance.
5. Conclusion and Outlook
PTFE film composite terry cloth fabric has excellent thermal and moisture comfort and has broad application prospects in sportswear, outdoor clothing and other fields. Future research directions include:
- Optimize the microporous structure of PTFE membrane to further improve breathability and moisture permeability;
- Develop new composite processes to reduce production costs;
- Explore multifunctional design, such as the introduction of antibacterial and ultraviolet ray protection.
Through continuous improvement, PTFEFilm composite terry cloth is expected to become a representative of the new generation of high-performance textiles.
References
(The relevant literature can be supplemented here based on actual research content)
The above is the main content framework for the study of thermal and moisture comfort of PTFE film composite terry cloth fabric. The specific experimental data and conclusions can be further improved based on actual research results.
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