Polyimide

NO.	Name	Surface density g/m2	Thick-ness, mm	Air permeability , dm3/m2sec	Operating temperature, ��
1.	�-в/в400	400	1,5	250	260
2.	�-в/в500	500	1,6	180	260
3.	�-в/в550	550	1,8	160	260
4.	�-в/в600	600	2,0	150	260

- the given filtering fabric can have the following chemical treatments:

• treatment reinforcing the cleaning capacity of the material;
• oil and water resistance treatment;
• surface coating of Teflon;
• impregnation of fibers with Teflon and water and oil repellence treatment;
• surface layer (coating) resistant to sparks;