Hydrophobic membranes protect high surface tension aqueous liquids like water, and reduce pressure within the packaging. Gore's oleophobic ePTFE membranes provide protection not only to aqueous liquids, but also to lower surface tension fluids like oils, soaps and detergents.
A GORE laminate is constructed of a microporous GORE™ membrane consisting of an expanded polytetrafluoroethylene (ePTFE) layer, which is laminated on to a support material. The support material mechanically stabilizes the GORE membrane and creates the connection to the device housing during the integration process.
Yes. The microporous structures of GORE membranes enable gas exchange in both directions while blocking the flow of liquids. Bi-directional gas flow can depend on whether there is positive or negative pressure in the container relative to the external environment. Gore offers a range of materials with varying airflows depending on how quickly the package needs to vent.
It depends upon the product form and application. A hole in the cap is required when using molded components and two layer foam liners. A hole in the cap is not required when using a 3FL Cap Liner or Induction Liner. Gore’s global engineering team can help to recommend the appropriate product form that will work with your specific application.
For caps with a hole, gas passes through the microporous ePTFE membrane and escapes through the hole in the cap while stopping liquid and particles from entering the package. The microporous ePTFE membrane prevents pressure build-up by constantly equalizing the difference in pressure between the inside of the container and the outside environment.
For caps without a hole, gas passes through the microporous ePTFE membrane to an area above the membrane, which directs gases to the cap threads while stopping liquid and particles from entering the package. The microporous ePTFE membrane prevents pressure build-up by constantly equalizing the difference in pressure between the inside of the container and the outside environment.
