0.7mm / 1.0mm PE Aluminum Foil Paperboard Vent Liner for Fermented Food Packaging

Product Overview

Our PE Aluminum Foil Paperboard Vent Liner is designed for sealing food containers that may release gas during storage, transportation, or shelf display. It is especially suitable for fermented tofu, chili sauce, pickled vegetables, fermented bean products, sauces, condiments, and other gas-generating food packaging.

The liner combines PE sealing material, aluminum foil barrier layer, paperboard support, and breathable venting function to help maintain package integrity while allowing controlled pressure release. Compared with ordinary sealing liners, this vented liner helps reduce the risk of container swelling, cap loosening, leakage, and package deformation caused by internal gas buildup.

Available in 0.7mm and 1.0mm thickness, with custom diameters from 2cm to 12cm, it can be matched with different plastic caps, glass jars, food cans, and wide-mouth containers. For food brands, packaging factories, and cap manufacturers, this product provides a practical sealing solution for fermented and gas-producing food applications.

Cause: Why Fermented Food Packaging Needs a Vent Liner

Many fermented foods continue to release small amounts of gas after filling and sealing. Products such as fermented tofu, chili sauce, kimchi-style vegetables, pickled products, bean paste, garlic sauce, and other fermented condiments may generate pressure inside the container due to microbial activity, temperature change, or natural fermentation.

When a normal non-breathable liner is used, the internal pressure may cause several packaging problems:

• The container may swell or deform during storage.
• The cap may become loose due to pressure buildup.
• The liquid or sauce may leak during transportation.
• The package may make an abnormal sound when opened.
• The product appearance on the shelf may be affected.
• In serious cases, the container may burst or lose its sealing performance.

For food exporters and packaging suppliers, these problems can lead to customer complaints, product returns, higher logistics losses, and damage to brand reputation. Therefore, fermented food packaging requires a liner that can provide both sealing performance and pressure balance.

Solution: Controlled Venting + Reliable Sealing

Our PE Aluminum Foil Paperboard Vent Liner is developed to solve pressure-related packaging issues in fermented food containers. The liner structure provides sealing support, barrier performance, and controlled air release.

The PE layer helps improve sealing contact with the bottle or jar mouth. The aluminum foil layer provides barrier protection against moisture, oxygen, odor transfer, and light. The paperboard layer gives the liner enough stiffness and support, making it easier to insert into caps and maintain a stable shape. The breathable venting design allows gas to be released in a controlled way, helping reduce internal pressure without fully opening the package.

This makes the liner suitable for brands that need a safer and more stable packaging solution for fermented foods. It is also a good option for cap manufacturers, food packaging factories, and private-label food producers who need customized liner sizes for different container types.

Specifications

Application

The PE Aluminum Foil Paperboard Vent Liner is widely used in food packaging that requires both sealing and pressure balance. Typical applications include:

Fermented Tofu Packaging

Fermented tofu may continue to release gas after filling. A vented liner helps reduce internal pressure and improves package stability during storage and transportation.

Chili Sauce and Fermented Sauce Packaging

Chili sauce, garlic sauce, bean paste, and other fermented condiments may produce gas, especially under temperature changes. This liner helps reduce swelling and leakage risks.

Pickled Vegetable Packaging

Pickled vegetables, kimchi-style products, and fermented vegetable jars need controlled pressure release to maintain a safer package condition.

Food Export Packaging

During sea freight, air freight, or long-distance transportation, temperature and pressure changes may increase the risk of package deformation. A vented liner helps improve packaging reliability.

Cap and Container Manufacturing

This liner can be supplied to cap manufacturers and packaging factories as a functional sealing component for food-grade packaging systems.

How It Works

The liner is placed inside the cap and contacts the mouth of the container after tightening. The PE surface helps create sealing contact, while the aluminum foil and paperboard structure provide support and barrier performance.

When gas is generated inside the container, the breathable area of the liner allows controlled pressure release. This helps prevent pressure from accumulating too much inside the package. At the same time, the liner still helps maintain basic sealing performance and protects the product from external contamination under normal packaging conditions.

The working principle is simple: seal the container, release excess gas, and reduce package swelling.

This makes the product especially useful for fermented food manufacturers who need to balance freshness, shelf appearance, transportation safety, and packaging performance.

How To Choose

When selecting a PE Aluminum Foil Paperboard Vent Liner, buyers should consider the following points:

1. Choose the Correct Diameter

   The liner diameter should match the inner diameter of the cap and fully cover the container mouth. Our standard customizable range is 2cm to 12cm.

2. Select the Right Thickness

   For lighter packaging or smaller caps, 0.7mm can be selected. For larger caps or applications requiring better support, 1.0mm is recommended.

3. Confirm the Food Type

   Different fermented foods release different levels of gas. Products such as fermented tofu, chili sauce, pickled vegetables, and bean paste may require different venting designs.

4. Test with Your Container

   Before mass production, we recommend testing the liner with your actual bottle, jar, cap, filling process, and storage conditions.

5. Consider Transportation Conditions

   For export packaging or long-distance shipping, venting performance is especially important because temperature changes may increase internal pressure.

Why Choose XINXIA

XINXIA provides customized sealing and venting liner solutions for food, daily chemical, agricultural chemical, and industrial packaging applications. We support custom diameter, thickness, structure, and functional design according to customer packaging requirements.

For B2B buyers, packaging engineers, cap manufacturers, and food brands, we can help develop practical liner solutions based on container size, product characteristics, sealing method, and transportation environment.

Our goal is to help customers reduce packaging failure, improve shelf appearance, and create safer packaging for gas-generating products.

FAQ

1. What is a PE Aluminum Foil Paperboard Vent Liner used for?

It is used for sealing food containers that may generate gas, such as fermented tofu, chili sauce, pickled vegetables, fermented sauces, and other fermented food products.

2. What thickness options are available?

We can produce 0.7mm and 1.0mm thickness options. Other thicknesses may be customized according to project requirements.

3. What diameter can you produce?

The available diameter range is 2cm to 12cm. Custom die-cut sizes can also be made based on cap and bottle dimensions.

4. Can this liner prevent bottle swelling?

It helps reduce internal pressure by allowing controlled gas release, which can reduce the risk of bottle swelling, cap loosening, and leakage. Actual performance should be tested with your product and packaging system.

5. Can I get samples before bulk order?

Yes. Samples can be provided for testing with your container, cap, filling process, and storage conditions before mass production.