- Compared with engineering plastics
Higher heat resistance: The long-term service temperature of common engineering plastics is mostly between 100°C and 150°C, while that of polyimide can reach above 200°C. Huangshan Jinshimu PI can maintain good performance at 300°C and above, enabling it to withstand more extreme high-temperature environments.
Better mechanical properties: The tensile strength of polyimide can generally reach above 100MPa, and it combines high hardness and high toughness. It has higher strength and better toughness than some engineering plastics, and also has superior impact resistance.
Superior electrical insulation: Under conditions such as high temperature and high frequency, the dielectric properties of polyimide are more stable, and the tangent value of the dielectric loss angle is lower. Its electrical insulation performance is more outstanding, meeting the special requirements of high-end electronic and electrical equipment.
- Compared with ceramics
Higher toughness and impact resistance: Ceramics have high hardness but are brittle and prone to cracking. Polyimide profiles, on the other hand, have good toughness and strong impact resistance, which makes them more reliable in practical use and less likely to be damaged by external impacts.
Good processability: Ceramics are difficult to process, and forming complex shapes comes at a high cost. Polyimide can be processed into various profiles with complex shapes through a variety of molding processes, such as compression molding, injection molding, and extrusion. It is convenient to process, has high production efficiency, and the cost is relatively low.
- Compared with rubbers
Higher strength and hardness: Rubbers usually have good elasticity, but their strength and hardness are relatively low. Polyimide profiles have higher strength and hardness, and can withstand greater external forces and pressures, making them suitable for occasions where structural strength is required.
Better dimensional stability: Rubbers are prone to deformation under high temperature or stress, and their dimensional stability is poor. Polyimide can better maintain its original shape and dimensions under high temperature and a certain amount of external force, with higher precision.
Excellent chemical resistance: Although rubbers also have a certain degree of chemical resistance, polyimide has better resistance to most organic solvents, acids, alkalis, and other chemical substances, and can maintain stable performance in harsher chemical environments.
- Compared with bakelite
Higher heat resistance and mechanical properties: The heat resistance and mechanical properties of bakelite (phenolic plastics) are generally not as good as those of polyimide. Polyimide has more excellent high-temperature performance, and its mechanical strength and toughness are also better, enabling it to be used under higher-demand working conditions.
Better electrical properties: Polyimide has more excellent dielectric properties, and its electrical insulation performance is more stable than that of bakelite under conditions such as high frequency and high voltage, making it more suitable for high-end electronic and electrical fields.
- Compared with metals
Lower density: The density of polyimide is much lower than that of most metals, which is beneficial for reducing the weight of equipment. In fields such as aerospace and automotive, it can effectively improve transportation efficiency, reduce energy consumption, and is also convenient for installation and operation.
Good chemical stability: Metals are prone to corrosion, while polyimide has good resistance to a variety of chemical substances. In corrosive environments such as the chemical industry and the marine environment, there is no need for complex anti-corrosion treatments like metals, resulting in low maintenance costs.
Excellent insulation performance: Metals are good conductors of electricity, while polyimide is a good insulator and can be directly applied to occasions where insulation is required. There is no need for additional insulation measures, which can simplify the design and production process.