High Efficiency Industrial Acid Resistance P84(Polyimide) Fiber Antistatic Filter Bag
- Oct 24, 2017 -
The by-product methanol is discharged continuously during the reaction. The second step is to produce the Bhet or the double hydroxy butyl ester, in the former Polycondensation Kettle and in the Polycondensation Kettle polycondensation reaction, the reaction temperature in the former Polycondensation Kettle is 270 ℃, the reaction temperature in the Polycondensation kettle is 270~280℃, and a few stabilizers are added to improve the thermal stability of the melt. The polycondensation reaction is carried out in a high vacuum (not more than 266Pa) and strongly stirred to obtain the polymer polyester.