Plastic-Silicone Composite Seal

Name: Plastic-Silicone Composite Seal
Brand: Churub Rubber
SKU: PROD-012

Plastic-silicone composite seal, overmolding, precise assembly features, no adhesive needed

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Description

This innovative composite seal features a rigid plastic carrier overmolded with LSR or solid silicone. The plastic substrate provides precise positioning and assembly features (snap-fits, threaded inserts, etc.) while the silicone provides sealing flexibility. Manufactured using our solid-to-liquid composite molding technology, ensuring a strong molecular bond without adhesives. Ideal for automotive fluid systems, medical devices, and consumer electronics.

Specifications

Material	PBT / PA66 + LSR
Hardness	60±5
Operating Temperature	-40°C to 180°C
Color	Black / Custom
Certifications	IATF 16949 / ISO 13485
MOQ	3000
Lead Time	25 days (after approval)
Customization	Drawing or sample based, full dimensional report provided

Engineering & Quality Documentation

📋 Technical Standards

Substrate/LSR material pair compatibility documented (PPA, PBT, PA tested)
RoHS / REACH compliant
Food-contact LSR grades (FDA / LFGB) for food-zone parts
Service range -40 °C to +200 °C

🏭 Manufacturing Process

Two-shot / overmolding: plastic substrate molded first, then LSR chemically bonded onto it in the same tool cycle — no primer needed for selected material pairs.

Bond strength validated by peel sampling
Seal lip geometry engineered per mating surface
One-piece part eliminates assembly and leak paths

🔍 Quality Inspection

▸ 100% visual inspection before packing (flash, short-shot, contamination)
▸ Dimensional verification against approved drawing; FAI report on first shipment
▸ Hardness per ASTM D2240 (Shore A) on every batch
▸ Lot traceability: material batch and cure records logged per carton
▸ Bond peel strength sampling per lot
▸ Seal lip dimension verification on FAI
▸ Leak test sampling for sealing assemblies