How to choose a suitable polyimide film for the industry?
Source：
/en Release date： 2024-06-26
When choosing a suitable polyimide film, the following key factors should be considered to ensure that the selected film meets your specific needs:
When choosing a suitable polyimide film, the following key factors should be considered to ensure that the selected film meets your specific needs:
1. Application requirements:
1. Choose according to your application field (such as electronics, optics, aerospace, etc.). The performance requirements for polyimide films may vary in different application fields.
For example, in the field of electronics, it may be necessary to pay attention to the dielectric and insulation properties of thin films; In the field of optics, it may be necessary to pay attention to its transmittance and surface smoothness.
2. Performance requirements:
1. Consider the high-temperature resistance of the film. Polyimide film has high temperature resistance and can be used for a long time in air at 250-280 ℃. According to actual needs, choose a suitable glass transition temperature (such as 280 ℃ for Upilex R, 385 ℃ for Kapton, or 500 ℃ or above for Upilex S).
2. Evaluate the radiation resistance, chemical corrosion resistance, and electrical insulation performance of the film to ensure they meet your application requirements.
3. Physical properties:
1. Pay attention to the relative density of the film (usually within the range of 1.39 to 1.45), as well as the tensile strength (such as a tensile strength of 200 MPa at 20 ℃ and greater than 100 MPa at 200 ℃).
2. As needed, consider using polyimide reinforced with graphite or glass fiber to improve its bending strength and modulus.
4. Chemical properties:
1. Understand the chemical stability of polyimide films, including their ability to resist solvents (such as hydrocarbons, esters, ethers, alcohols, and chlorofluorocarbons) and weak acids. However, please note that they may not be suitable for strong alkaline and inorganic acid environments.
5. Quality control and testing standards:
1. Ensure that the selected film meets relevant quality control standards, including appearance, size, density, thickness, and mechanical properties.
2. Conduct necessary performance tests according to application requirements, such as chemical stability testing, heat resistance testing, impact resistance testing, etc.
6. Brand and type:
1. Consider different brands and types of polyimide films, such as the Kapton series from DuPont in the United States and the Upilex series from Ube Seisan in Japan.
2. Different types of polyimide films (such as NA terminated polyimide, acetylene terminated polyimide, maleic anhydride terminated polyimide, etc.) have different performance characteristics. Choose the type that is suitable for your application.
7. Cost effectiveness:
1. Considering cost-effectiveness while meeting performance requirements. Different polyimide films may vary in price, so it is necessary to make a reasonable choice based on your budget.
In summary, selecting a suitable polyimide film requires comprehensive consideration of multiple factors such as application requirements, performance requirements, physical and chemical properties, quality control and testing standards, brand and type, and cost-effectiveness. By carefully evaluating these factors, you will be able to choose the polyimide film that is most suitable for your application.
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