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What is the post-curing process in silicone?

The post-curing process in silicone consists of the oven process of the parts once they have been molded by injection with liquid silicone.

The parts are placed in a hot air circulation oven at a certain temperature for a certain period. Generally, the indications for curing are determined by the manufacturer of the silicone, although it is very common for it to be between 2 or 4 hours at 200ºC.

The benefits of post curing silicone parts are as follows:

  • Removes residues (volatiles), odor and toxins from finished parts. For sectors such as medical or baby care parts, it is necessary to comply with the required safety standards and regulations.
  • It guarantees the complete cross-linking of the part, improving the physical characteristics of the parts.
  • It ensures that parts are dimensionally stable. It is particularly important for functional parts or parts that are assembled in assemblies where precision is required.

There are currently several grades of liquid silicone (LSR) on the market that do not require post-curing after molding parts and that comply with safety regulations and standards for the medical, baby care and personal hygiene sectors. These materials optimize the manufacture of parts by eliminating the post-curing process of the parts, resulting in a reduction in electricity consumption and a reduction in labor for handling the parts during the process.

OSF has an oven for the post-curing of the liquid silicone parts in the clean room, guaranteeing the process in conditions free of particles and contaminants.