Plastics Shrinkage Rate & Mold Shrinkage Rate

 Plastics Shrinkage Rate & Mold Shrinkage Rate

It is very important for each product design to know the plastics shrinkage rate. So that when he designs his parts design, he can present the right scale size of the drawing to mold  manufacturing factory like Intertech.

Meanwhile, the mold shrinkaged rate provides good information for production injection molding factory for calculating the final finished product size to be stablized in final shape.

http://www.taiwanmoldmaker.com/ 
http://www.intertech.net.tw/ 
https://intertech.en.taiwantrade.com/

Plastics Shrinkage Rate
General Plastics	Shrinkage Rate (%)
	Raw Material	Add. 30% GF
LDPE	2.0	0.5
HDPE	2.0	0.4
PP	1.8	0.4
PS	0.6	0.1
PVC	0.4	0.1
PMMA	0.5	0.1
ABS	0.6	0.1
Engineering Plastics	Shrinkage Rate (%)
	Raw Material	Add. 30% GF
NY6	1.5	0.4
NY66	1.5	0.4
PBT	2.0	0.4
POM	2.5	0.5
PC	0.6	0.1
PPO	0.6	0.1

Mold Shrinkage Rate
Plastics	Glass Fiber Adding	Mold Shrinkage Rate
	[%]	[%]
PS		0.3-0.6
HI-PS		0.5-0.6
SAN		0.5-0.7
ABS		0.4-0.7
ASA		0.4-0.6
LDPE		1.5-5.0
HDPE		1.5-3.0
PP		1.0-2.5
PP+GF	30	0.5-1.2
PVC-soft		>0.5
PVC-rigid		0.5
PVDF		3.0-6.0
PMMA		0.1-0.8
POM		1.9-2.3
PPO		0.5-0.7
PPO+GF	30	<0.7
CA		0.5
PC		0.8
PC+GF	10~30	0.15-0.55
PBT		1.5-2.5
PBT+GF	30-50	0.3-1.2
PA6		0.5-2.2
PA6+GF	30~50	0.3-1
PA66		0.5-2.2
PA66+GF	30~50	0.5-1.5
PA11		0.5-1.5
PA12		0.5-1.5
PPS	40	0.2