Custom PE Double-Ring Vent Gasket with PE Film and Foam Core for Pump Head Internal Pressure Release

The XINXIA PE Double-Ring Vent Gasket is a customized pressure-relief sealing component designed for installation inside dispensing pump heads, bottle closures, and functional packaging systems. It features a three-layer structure consisting of a PE film upper layer, a PE chemical or physical foam core, and a PE film lower layer. The double-ring design provides stable positioning, cushioning, sealing support, and controlled airflow inside the pump assembly.

When the packaged liquid releases gas or when internal pressure changes during storage, transportation, temperature fluctuations, or repeated dispensing, the gasket helps discharge accumulated air through the designed venting path. An optional ePTFE waterproof breathable membrane can be welded or laminated onto the venting area to allow gas transmission while helping prevent liquid leakage, moisture penetration, dust contamination, and packaging deformation.

The gasket can be customized according to pump-head dimensions, airflow requirements, chemical compatibility, foam hardness, thickness, outer diameter, inner diameter, membrane performance, and assembly method.

Many liquid products can create pressure changes inside their packaging. This is especially common with hydrogen peroxide solutions, disinfectants, cleaning agents, bleaching products, liquid fertilizers, agricultural chemicals, cosmetic liquids, and other formulations containing volatile or gas-releasing ingredients.

Without a suitable pressure-balancing component, several packaging problems may occur:

• Pump heads may become difficult to press or fail to return properly.
• Bottles may swell, deform, collapse, or leak.
• Liquid may seep through the pump structure during transportation.
• Internal pressure may force the product out around the neck or closure.
• Changes in temperature and altitude may affect dispensing performance.
• Dust, moisture, and external contaminants may enter through an unprotected vent hole.
• The pump assembly may lose sealing stability after repeated use.

A standard solid gasket can provide sealing but cannot effectively balance internal and external pressure. An open vent hole can release gas, but it may also allow liquid leakage or contamination. Therefore, pump-head packaging requires a component that combines sealing support, cushioning, accurate positioning, and controlled ventilation.

The XINXIA PE Double-Ring Vent Gasket provides a practical solution for pump-head pressure management.

Its double-ring construction helps the gasket remain securely positioned inside the pump assembly. The upper and lower PE film layers provide a clean, smooth, and moisture-resistant surface. The middle PE foam layer offers compression recovery, cushioning, and tolerance compensation between plastic components.

Depending on the customer’s application, the middle layer can be produced using chemical foam or physical foam.

Chemical PE foam is suitable for many cost-sensitive packaging applications and provides good cushioning, flexibility, and sealing performance. Physical PE foam offers a more uniform closed-cell structure, stable compression performance, cleaner appearance, and controlled material properties for applications with higher quality requirements.

For products requiring liquid protection and continuous pressure equalization, an ePTFE waterproof breathable membrane can be welded onto the designated venting area. The microporous membrane allows gas molecules to pass through while helping block liquid water, droplets, dust, and contaminants.

This combination helps improve packaging safety without significantly changing the original pump-head structure.

All specifications should be confirmed according to the customer’s pump-head drawing, bottle structure, liquid formulation, operating pressure, and required airflow.

The PE Double-Ring Vent Gasket is suitable for packaging systems that require internal pressure release, cushioning, and leak-control support.

Typical applications include:

Hydrogen peroxide formulations may slowly release oxygen during storage. The gasket helps create a controlled venting path inside the pump head, reducing the risk of bottle swelling, leakage, or pump malfunction.

Disinfectants, bleach-based cleaners, bathroom cleaners, and household chemical products may generate pressure or contain volatile ingredients. A vented pump-head gasket helps stabilize internal pressure during storage and transportation.

The gasket can be used in lotion pumps, treatment pumps, cosmetic dispensers, and other packaging requiring cushioning, sealing support, or pressure equalization.

Some agricultural formulations can release gas or experience pressure changes under high-temperature storage conditions. The gasket can be customized for chemical compatibility and high-airflow requirements.

The product can also be integrated into dispensing systems for specialty chemicals, laboratory liquids, automotive fluids, and industrial maintenance products.

The gasket is installed inside the pump head or closure assembly. Its double-ring profile supports accurate positioning and helps form a stable sealing interface between the internal plastic components.

The PE foam core compresses during assembly, compensating for dimensional tolerances and helping maintain contact pressure. The PE film layers provide smooth surfaces and protect the foam from direct contact with moisture or liquid.

When pressure inside the bottle rises, gas moves toward the designed venting channel. If an ePTFE membrane is included, the gas passes through the membrane’s microporous structure and is released to the outside environment.

At the same time, the membrane helps resist liquid droplets and external contaminants. When the pressure inside the bottle decreases, air can pass back through the venting structure to help prevent bottle collapse and unstable dispensing.

The final airflow depends on the membrane grade, exposed venting area, gasket compression, vent-hole dimensions, liquid viscosity, pump structure, and pressure difference.

1. Confirm the Pump-Head Dimensions
2. Identify the Packaged Liquid
3. Select Chemical or Physical PE Foam
4. Determine the Required Airflow
5. Evaluate Leakage Protection
6. Test the Gasket in the Complete Package

Provide the gasket outer diameter, inner diameter, thickness, ring width, center-hole size, and installation-space dimensions. A drawing, pump-head sample, or existing gasket sample is recommended.

Please provide the product type, chemical composition, concentration, viscosity, and whether the formulation releases gas. This information helps determine the appropriate PE foam and breathable membrane.

Chemical foam is suitable for standard packaging applications requiring flexibility and cost efficiency. Physical foam is recommended when more uniform cells, stable compression recovery, cleaner processing, and higher consistency are required.

Products with faster gas generation may require a larger venting area or a higher-airflow membrane. Low-pressure systems may require a more sensitive venting configuration.

For pump heads that may contact liquid during transportation or inversion, an ePTFE waterproof breathable membrane is recommended. Membrane water resistance should be selected according to the liquid properties and maximum internal pressure.

Final performance should be evaluated using the actual bottle, pump head, liquid formulation, filling volume, storage temperature, transportation orientation, and expected shelf life.

XINXIA can support sample production and dimensional adjustment before mass production.

XINXIA manufactures customized sealing materials, PE foam gaskets, breathable membranes, vent plugs, vent valves, and functional packaging components.

Our production capabilities include PE foam lamination, film coating, precision die cutting, hole punching, breathable membrane welding, dimensional inspection, and customized packaging.

We work with pump manufacturers, bottle-cap suppliers, packaging companies, chemical-product manufacturers, and international distributors. Customers can provide drawings, samples, pump-head assemblies, or performance requirements for evaluation.

Our advantages include:

• Customized dimensions and double-ring structures
• Chemical and physical PE foam options
• Optional ePTFE waterproof breathable membrane
• Support for low- and high-airflow applications
• Sample development before mass production
• Stable die-cutting and membrane-welding processes
• OEM and ODM production support
• Export packaging and international supply service

Yes. The outer diameter, inner diameter, thickness, ring width, center hole, foam density, membrane diameter, and overall structure can be customized according to your pump head or closure.

Chemical PE foam is flexible and cost-effective for general packaging applications. Physical PE foam normally provides a more uniform closed-cell structure, better dimensional consistency, cleaner appearance, and more stable compression performance.

The PE double-ring structure helps improve sealing and positioning. For applications requiring both pressure release and liquid protection, an ePTFE waterproof breathable membrane can be welded over the venting area. Final leakage resistance depends on the membrane grade, liquid formulation, internal pressure, pump design, and assembly conditions.

Yes. The gasket can be designed for hydrogen peroxide pump packaging to release accumulated gas and reduce bottle swelling or pump failure. The liquid concentration, filling volume, bottle size, storage temperature, and required airflow should be provided before material selection.

Please provide the product drawing or sample, outer and inner diameters, thickness, foam type, packaged liquid, annual quantity, required airflow, membrane requirements, and installation method. XINXIA can then recommend a suitable structure and prepare samples for testing.