Double-Ring Vent Liner for Pump Head Sealing and Pressure Relief

Packaging for hydrogen peroxide, disinfectants, cosmetic liquids, cleaning agents, and other gas-releasing products may develop internal pressure during storage and transportation. Without controlled ventilation, pump bottles can swell, leak, deform, or suffer unstable dispensing performance.

A pump packaging manufacturer required a sealing component installed inside the pump head. The liner needed to maintain reliable sealing while continuously releasing excess gas generated inside the container.

XINXIA supplied a customized double-ring vent liner consisting of upper and lower PE film layers, a chemical or physically foamed PE core, and a welded ePTFE waterproof breathable membrane. The double-ring structure improves compression sealing and installation stability, while the membrane allows gas to escape and helps block liquid leakage and external contamination.

After sample testing, the customer reported reduced bottle swelling, fewer leakage problems, and more stable pump operation during storage and transport.

Key options include customized outer diameter, inner diameter, thickness, airflow, PE foam density, membrane performance, and chemical compatibility. The product combines sealing, cushioning, pressure equalization, and controlled venting in one compact component.

The XINXIA double-ring vent liner provides a practical solution for pump head sealing and pressure relief, helping packaging manufacturers improve product safety, transportation reliability, and end-user experience.