Temperature cycling causes more leakage in O-Rings and Rubber Seals than fixed extreme temperatures, from dynamic coupled thermal damage. In Caoutchouc Industry and Rubber Processing, steady heat ages Rubber Products and creates compression set; low temperature shrinks Moulded Rubber Parts and Rubber Moulded Items. Repeated cycles cause irreversible damage and transient leakage for vehicle and pipeline Industrial Seals.
- Rings, Gaskets and Silicone Gaskets rely on compressive contact pressure. Synthetic Rubbers (EPDM Rubber, Silicone Rubbers) expand more than metal grooves. Temperature cycling changes Rubber Parts’ compression ratio. Thermal expansion and cold hardening reduce resilience of Car Rubber Gaskets, Rubber Seals for Fittings and Silicone Foam Seals.
- High-temperature: Overexpanded Rubber over-compresses O-Rings and Gaskets. Aging triggers compression set and stress relaxation. Cooled Moulded Rubber Parts lose rebound, leading to permanent seal damage.
- Low-temperature: Synthetic Rubbers shrink and stiffen. Rubber Products fail to regain elasticity on cold startup, causing pressure-induced transient leakage.
- Cumulative cyclic damage: Thermal cycles degrade Industrial Seals via over-compression, falling sealing force, interfacial slip and crack growth, eventually failing Car Rubber Gaskets and Rubber Seals for Fittings.
- Thermal shock & system risks: Mismatched deformation between Rubber Parts and metal cracks or peels Seal Rings. Structural distortion and pressure-temperature coupling speed up failure, also affecting Rubber Hoses, Bellows and Rubber Buffers.
- Failure scenarios & controls: Leakage occurs during cold startup, thermal shock and low-pressure gas/vacuum. For Moulded Rubber Parts Manufacture, select rubbers with good low-temp and anti-ageing performance, optimize groove compression and structure, and run real thermal cycle tests to ensure Rubber Products reliability.
