Release agents for composites

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Release agents for composites are designed to ensure adequate lubricity and non-sticking properties to the mold. At the same time, they must protect the mold surface from resins and other highly abrasive raw materials used in this type of applications. The cost of the tooling in composite molding is often quite high. Hence the added importance of using a quality release agent that protects the mold surface. In this post you will find everything you need to know about mold release agents for composites. Further on we point out the key factors to select proper composite release agents regardless of the type of industrial application.
release-agents-composites

Characteristics of mold release agents for composites

Composites mold release agents create a flexible but high resistance physical barrier between the mold surface and the abrasive resin compound. This barrier protects the mold while ensuring the necessary extra lubricity that facilitates releasing. The formulation of this type of release agents, requires to evaluate both the possible wear of the release coating and the complexity of the mold. Our release agents for composites are based on a concentrated emulsion of high performance polymers (semi-permanents water-based) designed to ensure multiple releases after each application as well as to protect the mold surface. Our products eliminate possible anchor points such as micropores and other irregularities present on the mold surface. In this way, we can ensure a a clean and quick release process. The composite industry encompasses a huge number of molding processes and raw materials. For this reason, we have formulated different kinds of release agents optimized to the particular needs and types of application of our customers. In case you have any specific needs related to molding, do not hesitate to contact us and we will prepare an offer according to your needs.

Key factors to choose suitable composite mold release agents

In the choice of mold release agents for composites we should take into consideration the following things:
  • no transfer (contamination) of the release agent to the rotomolded part. We can achieve that if the release agent is properly stick to the mold surface.
  • high amount of molding cycles after each release agent application.
  • easy application. We must bear in mind that we often find very complex-shaped molds.
  • solvent-free products. Thanks to them we achieve cleaner, safer and healthier working environments.
  • chemical stability. The quality of rubber release agents is very linked to the expiration term provided by the producer.
  • not containing elements that could damage the mold surface
  • low level of in-mold buildup or mold fouling

Conclusion

Composite mold release agents are formulated to protect mold surfaces from highly abrasive resin compounds. The cost of the tooling in composite molding is often quite high. At the same time, release agents must ensure the necessary extra lubricity to the mold surface to facilitate the easy release of molded parts. Thanks to our close collaboration with our partners, we can assure the experience and the capability to customize composite release agents according to each particular application. If you want to know more about this topic, we recommend you read our complete guide of mold release agents.
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