Aluminum Foil Paperboard Venting Seal Liner for Agrochemical Packaging | Diameter 20mm–130mm | Pressure Relief & Leak Prevention

The Aluminum Foil Paperboard Venting Seal Liner is specially designed for agrochemical packaging that requires both secure sealing and controlled gas exchange. Combining aluminum foil, paperboard, and a breathable membrane structure, this venting liner effectively balances internal and external pressure while preventing liquid leakage, moisture ingress, and contamination.

Widely used in pesticide bottles, herbicide containers, fertilizer packaging, plant nutrient solutions, and other agricultural chemical products, the liner helps prevent bottle deformation caused by temperature fluctuations, transportation, or chemical reactions. Available in diameters ranging from 20mm to 130mm, it can be customized to fit various bottle neck sizes and container materials such as HDPE, PET, PP, and fluorinated bottles.

With excellent chemical resistance, waterproof performance, and reliable venting capability, this venting induction seal liner is an ideal solution for agrochemical manufacturers seeking safer packaging, longer shelf life, and compliance with international transportation standards.

Many agrochemical products generate gases during storage and transportation due to:

• Chemical reactions inside the container
• Temperature changes during shipping
• High-altitude transportation
• Volatile active ingredients
• Concentrated liquid formulations

Without proper pressure balancing, containers may experience:

• Bottle swelling
• Leakage
• Seal failure
• Container deformation
• Product loss
• Customer complaints

Traditional induction seal liners create a completely sealed environment, which may trap pressure inside the package and increase transportation risks.

Our Aluminum Foil Paperboard Venting Seal Liner integrates a waterproof breathable membrane into the sealing structure.

• Allows gas molecules to escape safely
• Prevents liquid leakage
• Blocks water, dust, and contaminants
• Maintains package integrity
• Reduces bottle swelling during transportation
• Improves storage stability
• Compatible with most agrochemical formulations
• Supports international export shipping requirements
• Customizable dimensions and venting performance

The venting membrane enables pressure equalization while maintaining a leak-proof seal, making it particularly suitable for aggressive chemical products and pressure-sensitive formulations.

Used for insecticides, fungicides, herbicides, and plant growth regulators requiring pressure management.

Prevents bottle expansion caused by temperature fluctuations and transportation conditions.

Suitable for concentrated agrochemical formulations that may release gases during storage.

Provides reliable sealing and venting for high-value crop treatment products.

Can also be applied to selected industrial chemicals requiring controlled pressure release.

Ideal for international transportation where changes in altitude and climate can affect package pressure.

The venting seal liner combines induction sealing technology with a microporous waterproof membrane.

The liner is placed inside the cap and sealed onto the bottle mouth using electromagnetic induction equipment.

The aluminum foil layer creates a strong seal that protects the product from contamination and tampering.

When internal pressure increases, gas molecules pass through the breathable membrane.

The membrane's microporous structure blocks liquids and prevents leakage, even while allowing airflow.

The package remains balanced and secure throughout storage, transportation, and end-user handling.

Selecting the correct venting liner depends on several factors:

Choose the appropriate liner size between 20mm and 130mm according to your bottle opening.

Different agrochemical formulations require different venting capacities.

Examples:

• High-gassing pesticides → High venting rate
• Standard fertilizers → Medium venting rate
• Low-volatility chemicals → Standard venting rate

Confirm whether your bottle is:

• HDPE
• PET
• PP
• Fluorinated HDPE

Consider:

• Export shipping
• High-temperature storage
• High-altitude transportation

Verify compatibility with your induction sealing machine specifications.

Provide formulation details to ensure optimal membrane and liner selection.

Yes. The waterproof breathable membrane allows gas transmission while blocking liquid penetration, ensuring both venting and leak prevention.

Standard production covers diameters from 20mm to 130mm. Custom dimensions are available upon request.

Yes. The liner is designed for agrochemical packaging and offers excellent chemical resistance. Compatibility testing can be provided for specific formulations.

Yes. Different membrane grades and venting rates can be selected according to the gas generation characteristics of your product.

Yes. Free or customized samples can be supplied for sealing and compatibility testing before mass production.

We provide:

• Custom diameters from 20mm–130mm
• Customized venting rates
• OEM & ODM manufacturing
• Technical support
• Fast sample delivery
• Export packaging experience

Send us your bottle size, cap specification, product formulation, and annual demand quantity, and our engineering team will recommend the most suitable venting seal liner solution for your application.