PROCESSING LIMITATIONS FOR VARIOUS POLYMERS- GUIDELINES
Poly-mer |
Density Room Temp. |
Process temp. degree c |
Density process temp |
%age injection utilisa-tion capacity |
Permissible residence time - min. |
Max-flow ratio for 1mm wall thickness |
Screw cushion mm |
Shrinkage % |
Output ratio related to Ps |
Screw rpm related to Ps |
ABS |
1.05 |
220-260 |
0.96 |
40 - 80 |
|
100-140 |
4-6 |
0.4 - 0.7 |
0.83 |
0.83 |
CA |
1.29 |
170-250 |
1.10 |
50 - 80 |
5- 8 |
300 |
3 |
0.4 - 0.7 |
NA |
NA |
POM |
1.42 |
192-215 |
1.16 |
30 - 80 |
15 |
100-230 |
2 - 6 |
2 |
NA |
NA |
PMMA |
1.18 |
220-260 |
1.09 |
35 - 80 |
4- 8 |
100-130 |
2 - 6 |
0.4 - 0.8 |
0.94 |
0.74 |
PPO |
1.06 |
250-290 |
NA |
30 - 80 |
8 |
100-140 |
3 - 4 |
0.4 - 0.7 |
NA |
NA |
PA6 /6 |
1.14 |
220-280 |
0.95 |
40 - 80 |
5 |
100-230 |
2 - 4 |
NA |
0.58 |
0.50 |
PC |
1.22 |
280-310 |
1.08 |
50 - 80 |
2- 3 |
60-100 |
4 |
0.7 - 0.8 |
0.67 |
0.57 |
PES |
1.37 |
330-400 |
NA |
NA |
NA |
60- 120 |
4- 5 |
0.6 |
0.95 |
0.83 |
PBT |
1.31 |
220-270 |
NA |
40 - 80 |
3- 4 |
125-185 |
4 |
NA |
NA |
NA |
PPS |
1.5 - 2.1 |
300-360 |
NA |
50-80 |
2- 4 |
120-150 |
4 - 6 |
0.2 |
NA |
NA |
PETP |
1.38 |
260-300 |
1.2 |
50 - 80 |
2- 4 |
50-90 |
4 |
1.3 - 1.5 |
0.8 |
0.74 |
PS |
1.05 |
220-270 |
0.95 |
25 - 90 |
2-4 |
150-200 |
4 |
0.45 |
1.00 |
1.00 |
HDPE |
0.95 |
220-280 |
0.74 |
10 -85 |
|
170 |
2 - 6 |
1.5 - 2 |
0.73 |
0.94 |
LDPE |
0.92 |
180-280 |
0.74 |
10 - 95 |
|
200 |
2 - 6 |
NA |
0.82 |
1.05 |
PP |
0.91 |
250-275 |
0.73 |
10 - 85 |
|
170 |
4 |
1.2 - 2.2 |
0.63 |
0.86 |
RPVC |
1.3 - 1.6 |
170-190 |
NA |
25 - 80 |
20 |
60 |
|
0.5 - 0.2 |
NA |
NA |
SPVC |
1.1 - 1.14 |
180-200 |
NA |
20 - 80 |
15 |
180 |
4 |
1 .2 |
NA |
NA |
SAN |
1.08 |
240-270 |
0.99 |
40 - 80 |
5- 6 |
140-180 |
4 |
0.5 |
0.96 |
1.12 |
TPU |
1.20 |
180-225 |
NA |
40 - 80 |
30 |
50 |
3 |
1 - 1.15 |
NA |
NA |
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