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Guide for molding and processing of LETIAN PPS
Author:admin  From:Letian Plastics  Hits:1940  Update:2008-12-935222.com

According to the usage and types of PPS, coating, plastic, fiber and film can be processing. Secondary operation can be doing on the molded plastic parts.
Extruder molding
Let middle molecular weight PPS resin thermal oxidization crosslink under melt point (280℃). When the melt index(5kg, 316℃)is low than 200g/10min, the resin can be used to extrude pelleting. Treated PPS resins with middle or high molecular weight are thoroughly mixed with fillers required on homogenizer and then extrude solely or with long fiber on twin-screw extruder. The PPS granules are obtained after cooling and pelleting. The helix angle of feeding sector of extruder should be 30º and the spiral flute should be enough large in order to easy feeding.
When extruder molding, the temperature of charging barrel is 300-340℃ and that of head is 300-320℃. For the processing temperature is higher and reinforce filler such as glass fiber is used, both the screw and machine barrel should employ wear and corrosion resistance materials.

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