Custom Polyimide gaskets Polyimide Machined Parts

Polyimide is one of the better overall performance of organic polymer materials, high temperature resistance of more than 400 ℃, long-term use of the temperature range -200 ~ 300 ℃, no significant melting point, high insulation properties, 103 Hz dielectric constant 4.0, dielectric loss of only 0.004 ~ 0.007, is F to H level insulation materials.

According to the chemical structure of the repeating unit, polyimide can be divided into aliphatic, semi-aromatic and aromatic polyimide three. According to the thermal properties, it can be divided into thermoplastic and thermosetting polyimide.

Polyimide gasket characteristics:

1, polyimide has high irradiation resistance, its film in 5 × 109rad fast electron irradiation strength retention rate of 90%.

2, polyimide has good dielectric properties, dielectric constant of 3.4 or so, the introduction of fluorine, or air nanometer size dispersed in polyimide, the dielectric constant can be reduced to about 2.5. Dielectric loss of 10-3, dielectric strength of 100-300KV/mm, Guangcheng thermoplastic polyimide for 300KV/mm, volume resistance of 1017Ω-cm. These properties in a wide range of temperatures and frequency range can still be maintained at a high level.

3, polyimide is a self-extinguishing polymer, low fuming rate, does not burn.

4, polyimide in a higher vacuum under the amount of outgassing is very small.

5, polyimide non-toxic, can be used to manufacture tableware and medical instruments, and withstand thousands of times sterilization. There are some polyimide also has a very good biocompatibility, for example, in the blood compatibility test for non-hemolytic, in vitro cytotoxicity test for non-toxic.