W17 HDPE Vent Plug with PTFE/PO Oleophobic Hydrophobic Membrane for Agrochemical Vented Caps

The W17 Vent Plug is a high-performance HDPE vent plug designed for agrochemical vented caps and chemical packaging containers that require stable pressure equalization, reliable liquid resistance, and long-term sealing safety. Built with a PTFE/PO non-woven waterproof breathable membrane, this vent plug provides both oleophobic and hydrophobic protection, helping packaging release internal gas while preventing liquid leakage, dust entry, and external water intrusion.

With a typical air flow rate of 2500 ml/min @7KPa, water entry pressure ≥85 KPa, and IP67/IP68 protection, the W17 vent plug is suitable for agricultural chemicals, liquid fertilizers, pesticides, oxidizing agents, disinfectants, and other formulations that may generate gas during storage or transportation. It helps reduce bottle deformation, cap swelling, leakage risk, and package failure caused by internal pressure buildup.

For agrochemical packaging manufacturers, cap factories, chemical filling plants, and brand owners in XXX market, the W17 vent plug offers a practical and reliable venting solution for demanding chemical packaging applications.

Agrochemical and chemical liquids often release gas during storage, transportation, temperature changes, or chemical reaction. When the container is fully sealed without a venting structure, internal pressure may gradually increase. This can lead to several packaging risks, such as:

• Bottle swelling or deformation
• Cap loosening or popping
• Liquid leakage during transport
• Container collapse caused by pressure difference
• Reduced shelf stability
• Safety complaints from end users
• Higher risk during ocean shipping or long-distance logistics

Traditional caps without vent plugs cannot balance the pressure inside and outside the container. For aggressive or high-gassing liquids, a normal sealing liner may not be enough. The package needs a controlled breathing system that can release gas while still blocking liquid and contaminants.

The W17 HDPE vent plug provides an effective pressure-balancing solution for agrochemical vented caps. Its breathable membrane allows air and gas to pass through while resisting liquid water, oil-based contamination, and external dust.

The PTFE/PO non-woven membrane is designed with a microporous structure. These micropores are large enough for gas molecules to pass, but small enough to resist liquid penetration under normal application conditions. The membrane surface is both hydrophobic and oleophobic, making it suitable for chemical packaging where liquid formulas may contain surfactants, solvents, oils, or active ingredients.

The HDPE plug body offers good chemical compatibility, stable mechanical strength, and easy assembly into plastic caps. By integrating the W17 vent plug into the cap, packaging manufacturers can create a safer and more stable vented closure system for agricultural chemicals and other gas-generating liquids.

The W17 vent plug is mainly used in agrochemical vented caps and chemical packaging closures. It is especially suitable for packaging that needs to release gas but still maintain liquid protection.

Typical applications include:

• Pesticide bottles
• Herbicide packaging
• Liquid fertilizer bottles
• Plant nutrition products
• Disinfectant packaging
• Oxidizing chemical containers
• Agricultural surfactant packaging
• Chemical drums and small chemical bottles
• High-gassing liquid packaging

For B2B customers in XXX market, the W17 vent plug can be applied to different cap designs and container systems. It helps improve packaging safety during filling, warehousing, transportation, and end-use handling.

The W17 vent plug works by using a microporous waterproof breathable membrane. When gas pressure builds up inside the container, the gas passes through the PTFE/PO membrane and is released to the outside environment. This reduces internal pressure and helps keep the container shape stable.

At the same time, the membrane blocks liquid from passing through. Its hydrophobic surface prevents water-based liquids from penetrating, while its oleophobic surface improves resistance against oil-based or surfactant-containing chemical formulas. This balance allows the package to “breathe" without open leakage.

The HDPE plug body provides the mechanical support needed for cap installation. Once assembled into the cap, the W17 vent plug becomes part of the closure system, helping the package maintain pressure balance while protecting the liquid product inside.

When choosing a vent plug for agrochemical packaging, buyers should consider the chemical formula, gas generation rate, container size, and transportation conditions.

For products with higher gas generation, a vent plug with stronger airflow performance is recommended. The W17 vent plug offers 2500 ml/min @7KPa, making it suitable for many agrochemical and chemical packaging applications that require efficient pressure release.

For formulas containing surfactants, oil-based components, or aggressive chemical ingredients, membrane surface treatment is important. The W17 uses an oleophobic and hydrophobic PTFE/PO membrane, which provides better protection than standard hydrophobic-only membranes.

For packaging exposed to rain, humidity, outdoor storage, or long-distance shipping, IP protection and water entry pressure should also be considered. With IP67/IP68 rating and water entry pressure ≥85 KPa, the W17 vent plug provides reliable waterproof protection for demanding packaging environments.

Before mass production, customers are recommended to test the vent plug with the actual liquid formula, cap structure, bottle material, filling volume, storage temperature, and transportation conditions.

The main function of the W17 vent plug is to release gas and balance pressure inside agrochemical packaging. It helps prevent bottle swelling, cap leakage, container deformation, and package failure caused by internal pressure buildup.

Yes. The W17 vent plug uses a PTFE/PO waterproof breathable membrane with hydrophobic and oleophobic surface properties. It allows gas to pass through while helping block liquid, water, dust, and contaminants.

It is suitable for agrochemical products such as pesticides, herbicides, fungicides, liquid fertilizers, disinfectants, oxidizing liquids, and other chemical formulations that may generate gas during storage or transportation.

The typical airflow rate is 2500 ml/min @7KPa, tested according to ASTM D737. This airflow level helps provide stable pressure equalization for many agrochemical packaging applications.

Yes. Plug size, plug color, membrane type, airflow performance, water entry pressure, and assembly structure can be customized according to the customer’s cap design, bottle structure, and product formula.