As Electric Vehicles (EVs) and Energy Storage Systems (ESS) advance towards higher power densities, Liquid Cooling Systems are the standard for thermal management. Cooling lines must endure constant thermal cycling and resist long-term chemical degradation from coolants. EPDM Rubber Tubing (Ethylene Propylene Diene Monomer), with its uniquely saturated molecular backbone, is the premier consumable for high-temperature fluid transmission and weather-resistant sealing.
Chemical & Physical Principles: Backbone Saturation and Anti-Swelling EPDM’s exceptional weather and chemical resistance stems from its polymer structure:
Saturated Backbone: Unlike natural rubber or NBR, the main polymer chain of EPDM is fully saturated (no double bonds). This provides extreme chemical inertness against ozone, UV light, and thermal oxidation, eliminating the cracking and aging issues common in outdoor or under-hood environments.
Anti-Swelling Mechanism: In liquid cooling, coolants (often water/glycol mixtures) can cause tubing to swell, leading to joint leaks. The volume swelling formula is: V_swell = (W2 – W1) / W1 * 100% (Volume Swell = Post-immersion Weight – Initial Weight / Initial Weight) Lixing utilizes precise peroxide curing formulations to maximize cross-linking density in our EPDM extrusions. This restricts V_swell to a minimal range even after thousands of hours of immersion, ensuring absolute airtightness and leak prevention at clamped joints.
Industrial Applications: EV Battery Thermal Management & Outdoor Base Stations Lixing Composite Material provides highly elastic and dimensionally precise EPDM tubing:
EV/ESS Liquid Cooling Lines: Boasting a broad temperature range (-50°C to 150°C), the tubing resists hardening in deep freezes and softening under high loads, maintaining consistent coolant flow.
Telecom Base Station Sealing: Superior ozone and weather resistance offers decades of maintenance-free service life for outdoor enclosures.
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