0.23mm / 0.3mm / 0.35mm / 0.38mm Large-Membrane Aluminum Foil Paperboard Vent

Our Large-Membrane Aluminum Foil Paperboard Vent Liner is designed for packaging applications that require both reliable sealing and high-efficiency pressure release. With available thickness options of 0.23mm, 0.3mm, 0.35mm, and 0.38mm, and a customizable diameter range from 2cm to 12cm, this liner is suitable for agrochemical packaging, hydrogen peroxide products, disinfectants, liquid fertilizers, pesticides, and other chemical containers that may generate gas during storage or transportation.

The product combines an aluminum foil paperboard sealing structure with a large breathable membrane area, allowing gas to escape smoothly while helping reduce the risk of bottle swelling, cap deformation, leakage, and package failure. Compared with standard small vent liners, the large-membrane design provides better exhaust performance for products with higher gas release volume.

It is an ideal sealing solution for B2B packaging manufacturers, agrochemical producers, chemical filling factories, and brand owners looking for safer and more stable packaging performance.

Many agrochemical and chemical liquid products are not completely stable after filling. During storage, long-distance transportation, temperature changes, shaking, or chemical reaction, the contents may continuously generate gas inside the container.

This is especially common in packaging for:

Agrochemicals, pesticides, liquid fertilizers, disinfectants, hydrogen peroxide, oxidizing liquids, cleaning chemicals, and other active chemical formulas.

If the container uses a normal non-vented sealing liner, pressure may build up inside the bottle. Once internal pressure becomes too high, the package may face several risks:

Bottle swelling, cap bulging, liner deformation, liquid leakage, reduced shelf stability, poor customer experience, and even transportation safety issues.

For products with a large exhaust volume, a small venting area may not be enough to release gas quickly. This is why a large-membrane aluminum foil paperboard vent liner is required. It increases the effective breathable area and helps maintain a better pressure balance between the inside and outside of the container.

Our large-membrane vent liner is developed to solve the pressure build-up problem in high-gas-release chemical packaging. The liner uses a multi-functional structure that provides sealing support, pressure equalization, and controlled ventilation.

The aluminum foil paperboard layer provides good dimensional stability and helps the liner sit firmly inside the cap. It also offers a clean sealing surface for the bottle mouth. The large breathable membrane allows gas to pass through while helping block liquid leakage under normal packaging conditions.

For agrochemical and hydrogen peroxide packaging, this structure can help reduce container deformation and improve storage safety. It is especially useful for products that continue to release oxygen, vapor, or gas after filling.

For manufacturers, this liner helps improve package reliability, reduce after-sales complaints, and lower the risk of product loss during shipping. For B2B buyers, it offers a customizable and practical venting solution that can be matched with different cap sizes, bottle materials, and chemical formulas.

This vent liner is suitable for pesticides, herbicides, fungicides, insecticides, plant protection chemicals, and other agricultural chemical containers. It helps release internal gas and reduce the risk of bottle swelling during storage and transport.

Hydrogen peroxide and similar oxidizing liquids may release oxygen over time. A large-membrane vent liner helps control internal pressure while maintaining packaging stability.

Some liquid fertilizers may generate gas due to formula reaction or temperature changes. The vent liner helps prevent pressure accumulation inside the bottle.

For disinfectants, sterilizing liquids, and active cleaning chemicals, this liner provides a safer sealing option when gas release is expected.

For bigger bottles or formulas with stronger gas generation, the larger breathable membrane area provides better exhaust performance than standard vent liners.

After the liner is placed inside the cap, the cap is tightened onto the bottle mouth. The aluminum foil paperboard structure provides sealing support and helps the liner remain stable inside the cap.

When the liquid inside the container begins to release gas, the pressure inside the bottle rises. The large breathable membrane allows gas to pass through the liner and move to the outside environment. This process helps balance the pressure difference between the inside and outside of the container.

At the same time, the membrane structure helps reduce the risk of liquid leakage under normal storage and transportation conditions. This makes the liner especially useful for chemical packaging that needs both venting performance and sealing protection.

The key advantage of this product is the large membrane area. A larger venting area means faster gas release and better pressure equalization. For agrochemical products, hydrogen peroxide, and oxidizing liquids, this can significantly improve package safety and reduce deformation problems.

The liner diameter should match the cap inner diameter and bottle mouth sealing area. We can customize sizes from 2cm to 12cm according to your packaging design.

Different cap structures require different liner thicknesses.
0.23mm and 0.3mm are suitable for thinner sealing designs and lightweight caps.
0.35mm and 0.38mm are suitable for applications requiring stronger support and better compression stability.

For products with high gas generation, choose a larger breathable membrane area. This helps improve exhaust speed and reduce pressure build-up.

Agrochemical and hydrogen peroxide formulas may have different chemical properties. Sample testing is recommended before mass production to confirm compatibility with the liquid, bottle, cap, and storage environment.

Before bulk order, customers should test sealing performance, venting effect, leakage resistance, high-temperature storage, transportation vibration, and long-term packaging stability.

The main benefit is stronger venting performance. The larger breathable membrane area helps release gas faster and reduces the risk of bottle swelling, cap bulging, and leakage.

We can produce 0.23mm, 0.3mm, 0.35mm, and 0.38mm thickness options. The suitable thickness depends on your cap structure and sealing requirements.

The available diameter range is 2cm to 12cm. Custom sizes can be produced according to your cap inner diameter and bottle mouth design.

Yes. This liner is suitable for hydrogen peroxide and other oxidizing liquid packaging that requires pressure release and sealing stability.

Yes. We recommend sample testing before mass production. Customers can test venting performance, sealing effect, chemical compatibility, and leakage resistance with their actual products.