ACTIVE PACKAGING · ONE-WAY DEGASSING · ZERO BURSTING
Smart Degassing Stickers for Liquid Packaging
Stop bloated, swollen, and bursting kimchi packages. Our high-performance flat square sticker valves release excess CO₂ gas while maintaining a 100% leak-proof barrier against liquids and oxygen.
Gas Control for Fermenting Foods
Fresh fermented products like kimchi continually release carbon dioxide (CO₂) gas. If sealed in standard pouches, the bags will bloat and burst. We offer three B2C and retail-friendly venting solutions:
Achieve Pack Smart Sticker Valve (AO002)
A flat, square degassing sticker that integrates seamlessly over punched venting holes.
Smart Sticker Valve (AO002)
Flat square degassing sticker, fully leak-proof
Squeeze & Pressure Test
Zero leak kimchi squeeze test verification
Inline Automated Applying
High-speed automated packaging line integration
Sticker Valves on Liner
Self-adhesive square sticker degassing valves
Sealed Header Pocket
Jongga-style suspended header sachet compartment
CO2 Gas Absorber Packet
StayFresh food-grade carbon dioxide gas absorber
CO2 Absorber Sachet
A food-safe sachet (StayFresh) is dropped directly inside the pouch. It actively traps CO₂ chemically to avoid package swelling. While cost-effective and easy to automate, the loose packet might cause buyer confusion as it is not edible.
Suspended Header Seal
A premium solution pioneered by Korean brands. A seal bar creates a distinct pocket at the top middle of the stand-up pouch, holding the sachet safely above the liquid fill line. This keeps the absorber out of direct contact with the food sauce.
Degassing Sticker Valve
An external flat adhesive square sticker. Applied over a punched 1.5mm hole, its hydrophobic membrane lets internal pressure vent out automatically while fully blocking liquid and preventing external air from entering the bag.
Option Comparison Guide
| Venting Option | Placement | Cost Level | Liquid Proof | Brand Experience | Best Application |
|---|---|---|---|---|---|
| CO2 Absorber Packet | Loose in bag | ★☆☆☆☆ (Lowest) | Yes (packet acts inside) | Good (not for eating) | Low budget, bulk packs |
| Sealed Header Pocket | Suspended above liquid | ★★☆☆☆ (Low) | Yes (sealed in top) | Very Good (isolated sachet) | DTC Kimchi, liquid foods |
| Degassing Sticker Valve | Applied over micro-vent | ★★★☆☆ (Medium) | Yes (hydrophobic) | Excellent (no chemical sachet) | Premium Kimchi, Sauces, DTC |
100% Leak-Proof Pressure Control
Will liquid leak if the bag is squeezed? Our square sticker valves are engineered with a specialized hydrophobic and oleophobic micro-porous membrane. The pores are micro-sized, allowing single molecules of gas (carbon dioxide) to escape under pressure while completely blocking large water and oil molecules.
FUNCTIONAL PERFORMANCE TESTING VIDEOS
We subject our venting solutions to extreme localized pressure. Watch the comparative testing videos below to see the physical performance of our smart degassing stickers vs. standard coffee valves:
Leak-Proof Valve Test
智能排气阀挤压测试
Watch our specialized flat square valve (AO002) in action under a severe squeeze test. Even when localized pressure is applied to the liquid-rich pouch, the hydrophobic membrane holds firm, preventing a single drop of liquid or sauce from escaping while allowing gas to vent.
Standard Coffee Valve
普通咖啡阀挤压测试
Standard round coffee valves are designed only for dry gases. Under liquid squeeze pressure, the internal seal fails, leading to immediate liquid leak. This highlights why standard coffee valves are not suitable for liquid-rich foods.
Active Venting Demo
单向排气过程演示
Close-up showing carbon dioxide gas bubble venting under pressure while completely blocking liquid backflow. The valve maintains physical seal integrity throughout the off-gassing process.
Step-by-Step Application Guide
To apply the square degassing sticker correctly onto pouches and avoid any edge leaks, follow this process:
- 1Fill and Seal: Fill the stand-up pouch with kimchi or liquid food and seal the main ziplock or heat-seal opening fully.
- 2Punch Micro-Hole: Punch a 1–2 mm hole in the upper third of the bag (above product level). Use a backing pad for a clean cut.
- 3Peel & Paste: Peel the sticker valve from the liner. Align it precisely over the punched hole, avoiding skin contact with the adhesive.
- 4Secure Seal: Rub and press the edges firmly onto the bag surface to ensure an airtight adhesive contact with no wrinkles.
5 Common Smart Degassing Sticker Problems (And Solutions)
Pouch Bursting During Shipping
Excess gas from roasted coffee or fermented foods builds up, causing the bag to inflate and burst in transit.
Oxygen Entering and Spoiling Product
Poor quality valves allow outside oxygen to seep back in, ruining flavor and reducing shelf life.
Valves Clogged by Fine Powders
Fine coffee grounds or liquids block the tiny venting holes, stopping the valve from functioning.
Bulky Hard Plastic Valves Increasing Costs
Traditional hard valves take up more space on the reel, require special application equipment, and increase shipping volume.
Inconsistent Venting Performance
Batches of valves open at different pressures, leading to some bags looking bloated while others look flat.
Frequently Asked Questions
Upgrade Your Brand's Fermenting Pouch
Order bulk square degassing sticker valves, pre-valved stand-up pouches, or Jongga-style suspended header bags. Sample packs are ready to ship.