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.
| 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 |
