IG GRADE BY INJECTION MOULDING

RECOMMENDATIONS FOR PROCESSING CELLULOSE ACETATE GRANULES - IG GRADE BY INJECTION MOULDING

work process

Description

The conditions for injection moulding IG Grade will vary depending on the type of injection moulding machine used and the nature of the mould and article to be moulded. However the general conditions below can be used as a starting point.

In processing cellulose acetate, the following general care must be taken to get a reasonable quality moulded part:

  • The material should be Preheated / pre-dried properly before moulding, otherwise bubbles, streaking, surface defects will appear in moulded part
  • The material should be free from contamination from other polymers
  • The machine barrel should be cleaned thoroughly if it was being used to mould another polymer
  • The material should not be kept stagnant in the heated injection barrel for an extended time
  • The mould should be designed to have adequate venting

GENERAL MOULDING PARAMETERS

Pre-drying In tray oven for minimum of 1 ½ hours at 70C
Injection temperature 160 – 180 C
Injection pressure 10-50 kg/sq cm
Mould temperature Preferably cooled by water, or at room temperature