The most important criteria when choosing a plastic injection mold release agent are the type of plastic raw material used, whether the part will be painted afterwards, mold temperature, and cycle time. Silicone-based products provide stronger release, while silicone-free products are more suitable for painting and bonding processes.
Considerations when making a selection
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Type of raw material
- Silicone-based products are commonly used for standard plastics like PP and PE.
- Silicone-free products are preferred for sensitive plastics like PC, PMMA, and ABS.
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Post-processing needs
- If the part is to be painted, coated, or bonded, a silicone-free release agent should be used.
- Silicone-based products can leave a film on the surface, which may cause painting defects.
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Mold temperature
- For molds operating at high temperatures, a product with high heat resistance should be chosen.
- Some silicone-based products can withstand temperatures up to +300°C.
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Production speed and cycle time
- For mass production, products with long cycle durability provide a cost advantage.
- Products that can produce multiple impressions with a single application are preferred.
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Surface quality
- If a shiny and non-marking surface is desired, low-residue formulations should be preferred.
- Products that form a thin film provide more homogeneous results.
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