Technical Specifications
| Item | Details |
|---|---|
| Liner Structure |
(Two-piece) Paperboard + Alu foil + PET film + Heat-seal + ePTFE membrane (One-piece) PET film + PE foam + Alu foil + PET film + Heat-seal + Breathable ePTFE membrane |
| Diameter | 15mm – 120mm (customizable) |
| Thickness | 0.25-0.35mm; 0.6mm–1.0mm (Customizable) |
| Seal compatibility | HDPE, PET, PP |
| Vent Membrane Size
|
12 mm (3 mm vent hole), 12 mm (6 mm vent hole), and 18 mm (10 mm vent hole) |
| Airflow Rate | ≥600 ; Adjustable from hundreds to thousands based on the contents |
| Water Entry Pressure (WEP) | ＞60Kpa (customizable) |
| Application | Agrochemical, chemical, fertilizer, cleaning liquid, oxidizing liquid |
| Pull Tab | Optional |
| Printing)) | Custom logo/text available |
| MOQ | 10,000 pcs for standard specifications; from 50,000 pcs for complex custom specifications |
| Certifications |
FDA-compliant materials, ISO 9001, HACCP, BRC |
Have a Specific Bottle or Venting Requirement?
Share your bottle material, opening diameter and product type. We'll help you determine a suitable liner configuration.
What Happens When Gas Builds Up Inside a Sealed Container?
Not every product can be sealed completely shut. Pesticides, liquid fertilizers, cleaning chemicals, and certain food products can release gas during storage or transport. If the container is sealed too tightly, pressure builds up. The bottle swells. Caps bulge. In worse cases, seals rupture or liquid leaks out .
Pressure Build-Up
Gas generation, temperature changes, and transportation conditions can increase internal pressure inside a sealed container.
Bottle Swelling or Deformation
Excessive internal pressure may cause bottles to swell, bulge, collapse, or deform during storage and transportation.
Leakage Risk
Pressure build-up increases stress on the container and seal, raising the risk of leakage.
The Solution: Vented Induction Seal Liners
A vented induction liner provides controlled gas release while maintaining a reliable liquid-tight seal,
helping equalize internal pressure and protect the package during storage and transportation.
| Standard Induction Seal | Vented Induction Seal | |
|---|---|---|
| Gas Release | Fully sealed | Controlled gas release |
| Pressure Control | Pressure remains contained | Helps equalize pressure |
| Swelling Prevention | Not designed for pressure release | Helps reduce swelling |
| Liquid Sealing | Reliable sealing | Sealing + breathable protection |
| Ideal Applications | General sealing applications | Gas-generating / pressure-sensitive products |
❗ Both solutions provide sealing protection. The key difference is whether the packaging also needs controlled gas release and pressure management.
How Does a Vent Liner Work?
① Induction Sealing:
The heat-seal layer bonds with the container mouth to create a reliable seal.
② Controlled Gas Release:
The breathable membrane allows gas to escape from the container.
③ Pressure Equalization:
Controlled gas exchange helps reduce excessive internal pressure.
④ Liquid Retention:
The sealing structure helps retain the product inside under normal conditions.
Key Benefits of Induction Vented Liners
Strong Induction Sealing
Securely bonds to the container mouth to provide a strong, reliable seal and help prevent leakage and external contamination.
Breathable &
Liquid-Tight
The breathable membrane allows controlled gas release while preventing liquid penetration, helping maintain a secure seal.
Pressure Equalization
Allows excess gas to escape and helps balance internal pressure, reducing the risk of bottle swelling, cap bulging and container deformation.
Customizable for
Your Application
Liner diameter, thickness, vent membrane size, vent position, venting rate and material structure can be customized to match your requirements.
Vented Liner Solutions for Different Packaging Needs
INTY offers multiple vented liner solutions to meet different requirements.
Aluminum Foil Vent Liners
- Available in one-piece and two-piece constructions
- Reliable induction sealing
PE Foam & EPE Vent Liner
- Available with single or double film lamination
- Good resilience and impact absorption
- Enhanced barrier protection
- Improved resistance to acids and alkalis
Lift & Peel Vented Liner
- Easy lift & peel opening design
- Premium branding / clean opening experience
Applications
Agrochemical Packaging
Pesticides, herbicides, crop protection, and fertilizers.
Cleaning Chemicals
Bleach, disinfectants, and gas-generating liquids.
Chemical packaging
hydrogen peroxide, formic acid (CO), chloroform etc.
Food Products
For foods requiring controlled pressure release.
Not Sure If Your Product Needs a Vented Liner?
Talk to a Technical Specialist
How to Choose the Right one?
Container Material
PET / HDPE / PP?
This determines the heat seal layer required.
01
Product Characteristics
What is inside the container? Is it corrosive or chemically active? How much gas is generated?
02
Venting Performance
Select vent membrane and venting capacity according to gas-generation requirements.
03
Liner Type & Structure
Based on your requirements, we will recommend the right vented liner type and structure
04
Not Sure Which Vented Liner You Need?
Send us your bottle size, container material and product type.
Our team can recommend a suitable vented liner structure and provide samples for testing.
Why Choose INTY?
Application-Based Recommendations
Solutions matched to your container material, contents and venting requirements.
Multiple Vented Structures
One-Piece, Two-Piece, aluminum foil, foam, high-barrier and easy-open solutions.
FDA-compliant materials
All raw materials meet food-grade standards
Customized Performance
Clean peel, stays in the cap after opening
Manufacturing supported by controlled quality systems including ISO 9001, HACCP and BRC.
Factory-direct
Technical support from sample testing and specification confirmation to mass production.
Production Environment
Advanced Equipment
Lamination Workshop
Welding Workshop
Die-Cutting Workshop
Certifications
ISO 9001
HACCP
BRCGS
FDA-Compliant Materials
PPWR-Compliant Packaging
Packaging & Delivery
Need the Right Vented Liner for Your Packaging?
Send us your bottle specs and product type.
We'll help you identify a suitable vented liner structure and provide free samples for testing.
Frequently Asked Questions
What is a vented induction seal liner?
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A vented induction seal liner is a sealing liner with a breathable membrane that allows controlled gas release while maintaining a reliable seal. It helps manage internal pressure in containers holding gas-generating or pressure-sensitive products.
How does a vented liner prevent bottle swelling?
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The breathable ePTFE membrane allows excess gas to escape from the container, helping equalize internal and external pressure. This can reduce the risk of bottle swelling, cap bulging and deformation caused by pressure build-up.
Can a vented liner prevent liquid leakage?
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Yes. The venting membrane is designed to allow gas exchange while resisting liquid penetration. Combined with a properly matched heat-seal layer, it provides reliable liquid sealing under normal storage and transportation conditions.
Will a vented liner allow moisture to enter the container?
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The venting membrane is designed to allow gas release while limiting liquid and moisture penetration. This can help protect powders and other moisture-sensitive contents from dampness. Performance depends on the selected membrane and application.
What products need a vented induction seal liner?
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Vented liners are suitable for products that generate gas or are sensitive to pressure changes, including pesticides, herbicides, fertilizers, biostimulants, cleaning chemicals, corrosive chemicals and other pressure-sensitive products.
Can I get samples before placing a bulk order?
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Yes. We can provide samples for sealing, venting and compatibility testing before mass production.
Can you customize the venting performance?
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Yes. Venting performance can be adjusted according to the product's gas-generation characteristics and packaging requirements.
What information do you need to recommend a vented liner?
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Please provide the container material, opening diameter, product type, gas-generation condition and required quantity. We can recommend a suitable liner structure for testing.
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