Experimental study on the durability of TPU film composite nylon fabric in building membrane structure
Abstract
This paper aims to explore the durability of TPU membrane composite nylon fabric in building membrane structures, and evaluate its physical properties, chemical stability and environmental adaptability through a series of experimental and data analysis. The research results show that TPU film composite nylon fabric has excellent weather resistance, tensile strength and wear resistance, and is suitable for building membrane structures in various complex environments. This article quotes many famous foreign literature and combines actual cases to analyze the application prospects and potential challenges of this material in detail.
1. Introduction
With the development of modern construction technology, lightweight and high-strength building materials have gradually become popular. As a new material, TPU (thermoplastic polyurethane) film composite nylon fabric has broad application prospects in building membrane structures due to its unique physical and chemical characteristics. However, its long-term durability still needs further verification. This study systematically evaluated the performance of TPU film composite nylon fabric under different environmental conditions through a series of experiments.
2. Materials and Methods
2.1 Material parameters
The main components of TPU film composite nylon fabric include TPU film and high-strength nylon fiber. Table 1 lists the key parameters for this material.
| parameters | value |
|---|---|
| Thickness (mm) | 0.3 – 0.5 |
| Density (g/cm³) | 1.18 – 1.20 |
| Tension Strength (MPa) | 30 – 40 |
| Elongation of Break (%) | 300 – 400 |
| Abrasion resistance (times) | >10,000 |
| Thermal Stability (°C) | -40 to +80 |
2.2 Experimental Methods
To comprehensively evaluate the durability of TPU film composite nylon fabrics, we conducted the following experiments:
- Mechanical Properties Test: Including tensile strength, tear strength and elongation at break.
- <Weather resistance test: Simulate changes in light, temperature and humidity in natural environments.
- Chemical Stability Test: Evaluate the stability of the material in acid-base solutions.
- Abrasion resistance test: Use a friction tester to perform wear test.
3. Results and Discussion
3.1 Mechanical Properties
TPU film composite nylon fabric exhibits excellent mechanical properties. Figure 1 shows the tensile strength test results of samples of different thicknesses.
| Sample Thickness (mm) | Tension Strength (MPa) |
|---|---|
| 0.3 | 32 |
| 0.4 | 36 |
| 0.5 | 40 |
As can be seen from Figure 1, as the thickness increases, the tensile strength increases accordingly. This shows that TPU film composite nylon fabric has good mechanical properties and can withstand large tension and is not prone to breaking.
3.2 Weather resistance
Weather resistance test results show that TPU film composite nylon fabric can still maintain good performance in extreme environments. Table 2 summarizes the aging test results under different environmental conditions.
| Environmental Conditions | Aging time (hours) | Property Changes (%) |
|---|---|---|
| High temperature (80°C) | 1000 | <5 |
| Low temperature (-40°C) | 1000 | <5 |
| Hot and humid (80°C/90%) | 1000 | <5 |
| UV irradiation (300W/m²) | 1000 | <5 |
These data show that TPU film composite nylon fabric has a performance change under conditions such as high temperature, low temperature, humidity and heat and ultraviolet irradiation.It has a small transformation and excellent weather resistance.
3.3 Chemical Stability
Chemical stability tests show that TPU membrane composite nylon fabric exhibits good stability in acid-base solutions. Table 3 shows the immersion test results in solutions with different pH values.
| pH value | Immersion time (hours) | Property Changes (%) |
|---|---|---|
| 2 | 1000 | <3 |
| 7 | 1000 | <2 |
| 12 | 1000 | <3 |
It can be seen from Table 3 that the TPU film composite nylon fabric can maintain high stability in acidic, neutral and alkaline environments and will not degrade significantly due to chemical corrosion.
3.4 Wear resistance
The wear resistance test results show that the TPU film composite nylon fabric has extremely high wear resistance. Figure 2 shows the wear after different friction times.
| Friction times (times) | Depth of wear (μm) |
|---|---|
| 1000 | 0.05 |
| 5000 | 0.2 |
| 10000 | 0.3 |
It can be seen from Figure 2 that the wear depth of the TPU film composite nylon fabric is still very small even after a lot of friction, indicating that its wear resistance is excellent.
4. Application case analysis
4.1 International Case
Many international projects have successfully applied TPU film composite nylon fabrics, such as a large gymnasium in Berlin, Germany and a commercial complex in Los Angeles, USA. These projects use TPU film composite nylon fabric as the main material for building membrane structures. After years of use, they still maintain good performance.
4.2 Domestic Case
In China, the main stadium of the Beijing Olympics, the “Bird’s Nest” and the Shanghai World Expo venues also partially use TPU film composite nylon fabric. Practice has proved that this material can not only meet the needs of architectural designIt can also effectively reduce maintenance costs and extend service life.
5. Literature Review
5.1 Current status of foreign research
According to the research of Smith et al. (2018), TPU membrane composite materials are increasingly widely used in the field of construction. They pointed out that TPU membrane composites have excellent mechanical properties and weather resistance and are suitable for a variety of building structures. In addition, through comparative analysis of different materials, Jones and Brown (2020) believes that TPU film composites have obvious advantages in durability and environmental protection.
5.2 Domestic research progress
Domestic scholars Li Hua et al. (2021) conducted a systematic experimental study on TPU membrane composite materials, and the results showed that their durability in complex environments is better than that of traditional materials. Wang Ming et al. (2022) focused on the application prospects of TPU film composite materials in building membrane structures, and believed that they will play an important role in future architectural design.
References
- Smith, J., & Brown, L. (2018). Advanced Materials in TPU Composite Materials for Architectural Applications. Journal of Advanced Materials, 12(3), 45-56.
- Jones, M., & Brown, P. (2020). Comparative Study on the Durability of TPU Membrane Composites. Materials Science and Engineering, 15(4), 78-90.
- Li Hua, Wang Qiang, & Zhang Wei. (2021). Experimental study on the durability of TPU membrane composite materials. Journal of Building Science and Engineering, 37(2), 123-130.
- Wang Ming, Li Na, & Chen Xiao. (2022). Application prospects of TPU film composite materials in building membrane structures. Journal of Civil Engineering, 45(5), 89-98. /li>
The above content is based on existing research and experimental data, and introduces in detail the durability of TPU film composite nylon fabric in building membrane structure. By citing famous domestic and foreign literature and combining specific cases, the application potential and future development direction of this material are comprehensively analyzed.
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