Overview
Square silicone is a versatile form of silicone rubber molded into square shapes for industrial and consumer applications. Silicone rubber, a synthetic elastomer, is derived from silicon, oxygen, and organic groups, offering unmatched flexibility and stability across extreme temperatures. Its square geometry makes it ideal for uniform sealing, cushioning, and insulation tasks. Unlike traditional rubbers, silicone retains elasticity in both freezing and high-heat environments, making it indispensable in automotive, aerospace, and medical sectors. Customizable in hardness (typically Shore A 20–80) and thickness, square silicone pads are often die-cut for precise fittings.
Physical and Chemical Properties
Square silicone exhibits low compression set, meaning it regains shape after deformation, and resists UV radiation, ozone, and weathering. Its thermal conductivity is low (0.2–0.3 W/m·K), making it an effective insulator. The material is also hydrophobic, repelling water and moisture. Chemically, silicone is inert to acids, alkalis, and polar solvents but may swell in non-polar solvents like hydrocarbons. Its dielectric strength (15–25 kV/mm) suits electrical applications. Food-grade variants comply with FDA 21 CFR 177.2600, ensuring safety in kitchen utensils.
Main Applications
In industrial settings, square silicone serves as gaskets in machinery, preventing leaks in pumps and valves. Electronics manufacturers use it as vibration-damping pads or thermal interface materials for circuit boards. Its non-stick properties benefit baking mats and mold-making. The medical sector employs sterilizable silicone squares for prosthetics and surgical tools. Consumer goods include jar seals, baby bottle nipples, and DIY craft molds. Automotive uses range from spark plug boots to battery insulation.
Safety and Storage
Pre-cured silicone squares are non-hazardous but may collect dust; store in sealed bags. Avoid contact with sharp objects to prevent tears. For adhesive-backed variants, ensure ventilation during application due to volatile components. Long-term exposure to temperatures above 230°C may cause gradual hardening. Disposal should follow local regulations, though silicone is non-biodegradable. Recycling programs for industrial scrap are emerging.
B2B Procurement Guide
When sourcing square silicone, prioritize suppliers with ISO 9001 certification and material traceability. Key specifications to confirm include tensile strength (4–12 MPa), elongation at break (100–800%), and tear resistance (10–50 kN/m). Bulk orders (100+ units) often reduce costs by 15–30%. Sample testing for compression set and longevity under operational conditions is recommended. Lead times vary from 2 weeks for standard sizes to 6 weeks for custom formulations.
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