Annealing
Objective : To prevent dimensional shrinkage of finished goods
Recommended : Any application where high dimensional stability is required at temperature over 80°C
*Anneal : Heat processing to defuse residual stress in plastic materials
Process:
- (1) Increase temperature to 180°C from room temperature over 2 hours
- (2) Keep 180°C for 1 hour
- (3) Gradually reduce temperature to room temperature over 8 hours
[Difference of dimension between Annealed and Non annealed after processing at 160°C×30min]
| Anneal | Non anneal | |
| MD |  0.01% |
-0.08% |
| TD | 0.01% |
-0.83% |
* To prevent heat aging, SC ,NC ,CV grade and white products are up to under 160°C.