The physical properties of PI Film are excellent. The following is a detailed explanation of its physical properties:
Color and transparency:
PI Film is usually yellow and transparent. This color not only provides a unique visual effect, but also reflects its good physical and chemical stability.
Thermal stability:
PI Film has excellent thermal stability and can maintain its performance under extreme temperature conditions. Its use temperature range covers a wide range, from more than 100 degrees below zero to 200 to 300 degrees. It can even be used for a long time in air at 250 to 280 degrees Celsius, and can reach a high temperature of 400 degrees Celsius for a short time.
The decomposition temperature is generally over 500 degrees Celsius, making it one of the most thermally stable varieties of known organic polymers.
Mechanical properties:
PI Film has excellent mechanical properties, such as flexural strength, flexural modulus and tensile strength. The flexural strength of graphite or glass fiber reinforced polyimide can reach 345 MPa and the flexural modulus can reach 20GPa.
The tensile strength of the unreinforced matrix material is above 100MPa, and some special types such as biphenyl polyimide (Upilex S) can reach 400MPa.
Chemical corrosion resistance:
PI Film is chemically stable and can prevent combustion without adding flame retardants. General polyimides are resistant to chemical solvents such as hydrocarbons, esters, ethers, alcohols and chlorofluorocarbons. They are also resistant to weak acids, but are not recommended for use in strong alkali and inorganic acid environments.
Dimensional stability:
PI Film has a low expansion coefficient, which means that its size changes less under different temperature conditions, thus maintaining good dimensional stability.
Electrical properties:
PI Film has excellent electrical insulation, which makes it an indispensable material in the fields of electronics, electrical and aerospace.
Other properties:
PI Film also has good radiation resistance, dielectric resistance and adhesion.
In summary, the excellent physical properties of PI Film give it a wide range of application prospects in many fields.
