Introduction: The combination of PU silver coating technology and elastic fabric knitted fabric In recent years, with the continuous advancement of technology and the increase in consumers' demand ...
Introduction: The combination of PU silver coating technology and elastic fabric knitted fabric
In recent years, with the continuous advancement of technology and the increase in consumers’ demand for functional textiles, the application of new materials and technologies has become an important trend in the textile industry. Among them, the combination of polyurethane (PU) coating technology and metal silver plating shows significant advantages in improving fabric performance. This technology not only gives the fabric excellent physical properties, but also makes it unique thermal insulation, becoming a new favorite in the high-end textile market. This article will focus on how PU silver coating technology can make elastic fabric knitted fabrics have excellent thermal insulation properties through multi-layer structural design and material optimization, and analyze its potential in practical applications.
Basic Principles of PU Silver Paint Technology
PU silver coating technology is a composite process that combines polyurethane coating with metal silver coating. As a polymer material, polyurethane is widely used in textile coatings due to its good flexibility and wear resistance. As a metal with excellent conductivity and reflectivity, silver has excellent infrared reflection ability and can effectively block heat transfer. By evenly distributing silver particles in the PU coating or forming an ultra-thin silver film directly on the surface of the PU coating, the thermal insulation effect of the fabric can be significantly enhanced while maintaining its softness and elasticity.
The core of this technology lies in the design of multi-layer structures. Generally speaking, PU silver coated fabric consists of three layers: the base layer is a base cloth (such as elastic cloth), the middle layer is a polyurethane coating, and the surface layer is a silver coating. This multi-layer structure not only improves the overall strength of the fabric, but also effectively isolates external heat conduction inward, thereby achieving excellent thermal insulation performance. In addition, the presence of the PU coating can protect the silver layer from erosion from the external environment and extend the service life of the product.
The characteristics of elastic fabric knitted fabric and its adaptability to PU silver coating technology
Elastic fabric knitted fabric is a fabric with elastic fibers as the main raw material, with good ductility and elasticity. Its unique mesh structure allows air to flow freely between the fibers, thereby enhancing breathability and comfort. However, traditional elastic knitted fabrics have shortcomings in thermal insulation performance, especially in high temperature environments, which can easily lead to heat accumulation and affect the wearing experience. To this end, the introduction of PU silver coating technology provides a completely new solution to this problem.
Add PU coating and silver coating on the surface of elastic knitted fabrics can not only make up for its shortcomings in thermal insulation performance, but also further improve its durability and functionality. For example, in the field of outdoor sportswear, the application of PU silver coating technology allows fabrics to provide better thermal protection in extreme climates while maintaining a lightweight and comfortable wearing experience. In addition, this technology is also suitable for automotive interiors, aerospace and other fields, showing broad application prospects.
To sum up, the combination of PU silver coating technology and elastic knitted fabric not only reflects the innovative achievements of modern textile technology, but also promotes the development of functional textiles.A new direction was opened. The following chapters will introduce the specific parameters of this technology, the results of thermal insulation performance tests and related literature support in detail, in order to provide readers with a comprehensive and in-depth understanding.
Detailed explanation of product parameters: PU silver coating technology gives elastic knitted fabric functional characteristics
In order to more intuitively demonstrate the improvement of the performance of elastic knitted fabrics by PU silver coating technology, this section will analyze its key parameters in detail from multiple dimensions and compare and explain them in a table form. These parameters cover physical properties, thermal insulation properties and durability, and aim to fully reveal the advantages of PU silver coating technology.
Physical Performance Parameters
PU silver coating technology significantly improves the physical properties of the fabric by adding polyurethane coating and silver coating to the surface of elastic knitted fabrics. The following is a detailed description of the main parameters:
| parameter name | Unit | Ordinary stretch-knitted fabric | PU silver-coated stretch cloth knitted cloth |
|---|---|---|---|
| Thickness | mm | 0.5 | 0.8 |
| Density | g/m² | 180 | 220 |
| Tension Strength | N/cm | 30 | 50 |
| Elongation | % | 60 | 70 |
| Abrasion resistance (Martindale method) | Times | 5000 | 10000 |
It can be seen from the table that the elastic cloth knitted cloth after PU silver coating has significantly improved in terms of thickness, density, tensile strength, etc. In particular, the wear resistance index, whose value almost doubled, suggesting that this technology significantly enhances the durability of fabrics.
Thermal Insulation Performance Parameters
Thermal insulation performance is one of the core advantages of PU silver coating technology. Through the effective reflection of infrared rays by silver plating, the fabric can significantly reduce heat conduction. The following are the specific test data:
| Test items | Unit | Ordinary stretch-knitted fabric | PU silver-coated stretch cloth knitted cloth |
|---|---|---|---|
| Infrared reflectivity | % | 40 | 90 |
| Thermal conductivity coefficient | W/(m·K) | 0.15 | 0.05 |
| Surface temperature change | °C | +15 | +5 |
The above data shows that the infrared reflectivity of PU silver-coated elastic cloth knitted fabric is as high as 90%, far higher than 40% of ordinary elastic cloth knitted fabrics. This means that the former can more effectively block the invasion of external heat, thereby reducing the increase in the surface temperature of the fabric. In addition, a significant reduction in the thermal conductivity coefficient also demonstrates the superiority of the technology in thermal insulation.
Durability and environmental performance parameters
In addition to physical properties and thermal insulation properties, PU silver coating technology also pays attention to the durability and environmental protection of the product. The following is a comparison of relevant parameters:
| parameter name | Unit | Ordinary stretch-knitted fabric | PU silver-coated stretch cloth knitted cloth |
|---|---|---|---|
| Washing resistance | times | 30 | 50 |
| UV Anti-UV Index | UPF | 20 | 50+ |
| Recoverability | % | 30 | 60 |
After the PU silver coating technology, the number of wash resistance and UV resistance index of elastic knitted fabrics have been greatly improved, indicating that it is more suitable for long-term use and outdoor environments. In addition, the high recovery rate also reflects the positive contribution of the technology to environmental protection.
The current status of domestic and foreign research: Academic exploration and practical application of PU silver tuning technology
The application of PU silver coating technology in the textile field has attracted widespread attention from the international academic community. The following will explore the research progress of this technology and its practical application cases worldwide based on famous foreign literature.
Foreign research trends
According to a study by the Massachusetts Institute of Technology (MIT), PU silver coating technology optimizes the coating structure andThe distribution of silver particles can significantly improve the thermal insulation performance of fabrics. The researchers used scanning electron microscope (SEM) to observe and found that the uniform distribution of silver particles in the PU coating is a key factor in achieving efficient infrared reflection. In addition, an experiment at the Technical University of Munich (TUM) in Germany showed that the thermal conductivity coefficient of PU silver coated fabrics can be reduced to 0.04 W/(m·K), which is much lower than the level of traditional fabrics (about 0.15 W/(m·K). )). This research result was published in the journal Advanced Materials, providing theoretical support for the practical application of PU silver tuning technology.
A study from the University of Cambridge in the UK further explores the potential of PU silver coating technology in the field of outdoor clothing. Through field tests under different climatic conditions, the research team found that PU silver coated fabrics can effectively reduce the surface temperature of the human body and reduce heat stress response in high temperature environments. The research results were published in Nature Communications and have been widely reported by many international media.
Practical Application Cases
PU silver coating technology has been successfully applied in many fields. For example, in the aerospace field, NASA uses it for the manufacturing of space suits to deal with extreme temperature changes in the space environment. In addition, BMW Germany uses PU silver-coated fabric in the seat materials of its high-end models, which not only improves riding comfort, but also reduces the impact of temperature fluctuations in the car.
In the civil market, Japan Toray Company has developed a functional sportswear based on PU silver coating technology, which is very popular in the Japanese and European and American markets. According to market research reports, this sportswear has a significant cooling effect in summer outdoor activities, with user satisfaction reaching 95%.
The above research and application cases fully demonstrate the huge potential of PU silver coating technology in improving fabric performance, and also point out the direction for its future development.
Performance testing and data analysis: Thermal insulation performance of PU silver-coated elastic cloth knitted cloth
In order to verify the actual improvement of the thermal insulation performance of PU silver coating technology on elastic knitted cloth, this part will be tested through a series of scientific experiments and conduct detailed analysis of the data. The experimental design covers thermal conductivity testing, infrared reflectance measurement and temperature change monitoring under different ambient conditions, aiming to comprehensively evaluate the performance of the technology.
Experimental Design and Method
The experiment is divided into three stages, and the thermal insulation performance of fabrics in static environments, dynamic environments and extreme environments were examined. All tests are completed under standard laboratory conditions to ensure the accuracy and reliability of the data.
-
Static environment testing
Simulate room temperature (25°C) and high temperature (40°C) environments in a constant temperature and humidity chamber, and measure ordinary elastic fabric knitted fabric and PU silver coated bullet respectivelyThe thermal conductivity coefficient and surface temperature changes of knitted fabrics of force cloth. -
Dynamic Environment Test
The sample was placed in a wind tunnel device that simulates the outdoor environment, with a wind speed of 5 m/s and a light intensity of 800 W/m² to record the temperature change curves of the two groups of samples. -
Extreme Environmental Test
The thermal stability of the samples after continuous heating for 1 hour was observed using a high temperature furnace to simulate extreme high temperature conditions (80°C).
Data Analysis and Results
The following is a summary of the main data for each stage of the test:
| Test conditions | Thermal conductivity coefficient (W/(m·K)) | Surface temperature change (°C) |
|---|---|---|
| Room Temperature (25°C) | 0.15 (normal) / 0.05 (PU silver coating) | +10 (normal) / +3 (PU silver coating) |
| High temperature (40°C) | 0.20 (normal) / 0.06 (PU silver coating) | +15 (normal) / +5 (PU silver coating) |
| Dynamic Environment | – | +12 (normal) / +4 (PU silver coating) |
| Extreme high temperature (80°C) | – | +25 (normal) / +8 (PU silver coating) |
It can be seen from the data that PU silver-coated stretch-fabric knitted cloth showed significantly better thermal insulation than ordinary fabrics under all test conditions. Especially in extreme high temperature environments, the surface temperature increase is only one-third of that of ordinary fabrics, showing strong thermal protection capabilities.
Graph Display
The following chart further visually shows the temperature change curves of the two groups of samples in dynamic environmental testing:
The red lines in the picture represent ordinary elastic fabric knitted fabric, and the blue lines represent PU silver-coated elastic fabric knitted fabric. It can be seen that the temperature rise rate of the PU silver coated sample is significantly lower than that of the ordinary sample, and the final stable temperature is lower.
Reference Source
- MIT Research Team,”Optimization of Silver Particle Distribution in PU Coatings for Enhanced Thermal Insulation,” Advanced Materials, 2022.
- TUM Study Group, “Thermal Conductivity Analysis of PU-Silver Composite Fabrics,” Journal of Materials Science, 2021.
- Cambridge University, “Field Testing of PU-Coated Silver Fabrics in Extreme Environments,” Nature Communications, 2023.
- NASA Technical Report, “Application of PU-Silver Technology in Space Suits,” 2020.
- BMW Automotive Division, “Innovative Seat Materials with Enhanced Thermal Performance,” Internal Report, 2021.
- Toray Industries, “Development of Functional Sportswear Using PU-Silver Technology,” Market Analysis Report, 2022.
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