Materials Used in Plastic Waterproof Breathable Valves

ePTFE (Expanded Polytetrafluoroethylene)

The gold standard for breathable waterproof valves, featuring microporous structure with 0.2-10μm pores.

Temperature Range -240°C to +260°C

Pore Size 0.2-10μm

Key Feature Hydrophobic vapor transmission

PTFE Membranes

Used as backing layer for ePTFE, providing structural support while maintaining chemical inertness.

Primary Use Structural backing

Key Feature Chemical inertness

Polypropylene (PP)

Cost-effective alternative offering good chemical resistance and moderate breathability.

Advantage Cost-effective

Modification Hydrophobic additives

Thermoplastic Polyurethane (TPU)

Balances breathability with excellent mechanical properties for flexible applications.

Applications Wearables, Automotive

Key Feature Flexibility & Durability

Waterproof Breathable Valve Materials