High Efficiency Industrial Alkali Resistance P84(Polyimide) Fiber Antistatic Film Coated Filter Bag
- Oct 24, 2017 -
This method directly uses ethylene oxide and PTA reaction to produce terephthalic acid hydroxyethyl ester, and then polycondensation reaction. Its advantage is that ethylene oxide can be dispensed with ethylene glycol production process, high equipment utilization, less auxiliary equipment, products are easy to refine. The disadvantage is that the addition of ethylene oxide and PTA needs to be carried out under 2~3mpa pressure, demanding on equipment, thus affecting the widespread use of the law. Fiber pet molecular weight should not be less than 20000, thin film pet molecular weight of about 25000, general plastics used pet molecular weight of about 20000~30000.