LSR Liquid Silicone Rubber vs. HCR High Consistency Rubber: Materials, Tooling & Process Comparison
1. Overview: Choosing Between LSR and HCR Silicone
Engineers often face the choice between LSR (Liquid Silicone Rubber) and HCR (High Consistency Rubber). While both share a siloxane polymer backbone, they differ fundamentally in viscosity, curing mechanism, manufacturing process, and economic scalability.
Jun-Hsiang Enterprise operates both compression molding and LIM liquid injection equipment, helping customers choose the ideal process.
2. Key Process & Material Differences
• LSR: Liquid A/B system, platinum-cured with zero byproducts. High fluidity ideal for micro-details, medical compliance, and automated fast cycle injection.
• HCR: High viscosity gum, milled with peroxide or platinum agents. Suitable for compression molding, extrusions, and lower initial tooling costs.
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