Table 5.

Optimization experiment investigating the effect of compression gap and holding pressure in the ICM of the COP material: (a) with two factors on two levels; (b) constant parameters.

(a)			(b)
Factors	Low Level	High Level	Parameters	Value
Compression gap	0.4 mm	1.0 mm	Injection velocity	40 mm/s
Holding pressure	250 bar	450 bar	Switchover	10 mm
			T melt COP	280 °C
			T mold COP	105 ± 3 °C