Liquid Silicone Rubber (LSR)
LSR injection molding is different than traditional thermoplastic injection molding. For this process, the liquid silicone is supplied in two containers, Part A and Part B, then typically mixed at a 1:1 ratio. Once mixed, the material is then injected into a hot mold where it cross-links and cures to form the part geometry.
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Advantages
LSR injection molding offers custom manufacturing opportunities and is a sought-after solution due to its ability to mold complex part geometries, excellent mechanical properties, and purity. Other benefits include:
- High tear strength
- Great optical clarity to maximize light transmittance
- UV resistant
- Biocompatible
- Low compression set
- Excellent chemical resistance
- Withstands harsh environments ranging from low to high temperature extremes
- Ability to overmold and bond onto a variety of substrates, such as plastics and metals
- Customizable additives such as antimicrobial, electrical conduction, self-lubricating and antistatic
Applications
Some applications benefiting from LSR injection molding include:
- Medical device and patient interface components
- LED lenses and optics
- Electrical connectors and seals
- Infant bottle nipples, pacifiers, and toys
- Plumbing gaskets and seals
- Soft touch buttons/handles and appliance components
- Consumer goods
- Food and beverage preparation, dispensing and utensils