Proprietary ePTFE Technology from Gore

One remarkably versatile polymer, polytetrafluoroethylene (PTFE), lies at the heart of Gore's innovative products.

Bob Gore, now the chairman of the company's board of directors, discovered that rapidly stretching PTFE under the right conditions created a very strong, microporous material. The result, known ePTFE, exhibits an amazing array of properties:

• Strength (high strength-to-weight ratio)
• Chemical inertness
• Biocompatibility
• High thermal resistance
• High chemical resistance in harsh environments
• Low flammability
• Low coefficient of friction
• Low dielectric constant 
• Low water adsorption 
• Good weathering properties

Gore is the world leader in understanding and engineering PTFE, expanded PTFE, and PTFE composites into thousands of varied products.

Providing superior airflow and liquid resistance for vented containers

When integrated into a package design, ePTFE allows for the release of gases without letting liquid penetrate the venting membrane. When liquid penetrates other porous material, airflow stops. This phenomenon is referred to as “wetting out”. Ordinary membranes that simply allow initial airflow will clog quickly, prohibiting consistent airflow and will often leak – especially when a container is in an upside down position during use. GORE™ Packaging Vents allow consistent airflow, even after liquid contact.

When liquids are sprayed or dispensed, a vacuum is created within a closed system. GORE™ Packaging Vents allow the package to breathe by equalizing pressure. This simple closure vent solution helps to assure that containers maintain their shape and do not leak while liquids are being dispensed.