List of TOPAS® COC grades

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5. Molding characteristics

5.3 After-shrinkage

Fig. 5-10, Fig. 5-11, Fig. 5-12 and Fig. 5-13 show after-shrinkage by annealing of 8007S-04, 5013L-10, 6013S-04, and 6015S-04, respectively. Rresins shrink due to annealing, by which molding distortion is relieved. Basically, we recommend that the annealing temperature is lower than mold temperature and 20°C lower than DTUL.

Fig. 5-10 After-shrinkage of 8007S-04 (50°C annealing, 2 mm thickness)	Fig. 5-11 After-shrinkage of 5013L-10 (100°C annealing, 2 mm thickness)
Fig. 5-12 After-shrinkage of 6013S-04 (100°C annealing, 2 mm thickness)	Fig. 5-13 After-shrinkage of 6015S-04 (120°C annealing, 2 mm thickness)