Reducing the Sink Marks of a Crystalline Polymer Using External Gas-Assisted Injection Molding

Table 3

Values of the sink marks of the crystalline polymer products.

Number	Parameter									Sink mark
	(°C)	(MPa)	(mm/s)	(MPa)	(s)	(s)	(MPa)	(s)	(s)	(mm)
1	180	105	40	10	5	35	3	5	1.5	0.264
2	220	110	35	80	2	25	8	10	2	0.155
3	220	70	60	90	3	10	1	30	1.5	0.0723
4	180	75	25	50	2	25	2	20	2	0.121
5	200	100	50	100	1	40	6	30	0.5	0.098
6	200	110	60	50	5	50	7	25	2	0.067
7	180	85	65	90	2	45	9	5	1	0.202
8	200	95	30	40	2	40	0	15	2.5	0.168
9	220	85	35	70	4	45	3	30	2.5	0.143
10	180	90	35	60	5	20	8	30	1	0.127
11	200	110	25	40	3	10	40	25	0	0.040
12	180	90	70	40	1	15	4	10	0.5	0.176
13	220	85	40	30	1	30	90	25	0	0.073
14	220	95	25	100	4	50	5	15	1	0.157
15	220	65	55	50	5	35	70	10	0	0.154
16	180	70	30	20	4	40	6	15	0.5	0.107
17	180	65	45	80	1	35	5	25	2	0.080
18	180	95	70	30	4	30	0	25	1.5	0.213
19	200	80	60	20	2	45	40	30	0	0.066
20	200	80	45	80	5	15	0	15	0.5	0.120
21	220	75	70	60	3	55	6	20	1.5	0.132
22	200	70	40	30	3	55	8	5	1.5	0.208
23	180	100	55	70	3	10	7	15	2.5	0.112
24	220	105	65	10	2	20	5	20	1	0.079
25	180	105	45	90	3	55	10	20	0	0.117
26	200	75	50	10	4	15	9	20	2.5	0.044
27	220	90	50	20	1	50	1	10	2	0.240
28	220	100	55	60	4	25	2	5	0.5	0.167
29	200	65	30	70	1	20	2	5	1	0.172
30	200	80	65	100	5	30	4	10	2.5	0.145