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W.L. Gore: Cap liners

Two new 3FL (Full Face Foam Liner) cap liners from W. L. Gore & Associates are engineered to maintain the structural integrity of containers of chemicals for agricultural and household uses.
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The 3FL-363 and 3FL-373 cap liners, the latest addition to Gore’s extensive portfolio, provide excellent breathability and are resistant to many of today’s most aggressive chemicals – toilet cleaners, stain lifters, pipe clog removers, and organic fertilizers – without necessitating any changes in formulation. This enables OEMs to get their products to market faster and possibly develop even more effective formulations.

Packaged chemical products often release or consume gases, causing plastic containers to collapse, swell, leak, or even burst. GORE® cap liners have been developed to help the packaging engineer maintain container integrity throughout distribution, transportation and storage.

The 3FL-363 and 3FL-373 cap liners allow containers to breathe without leaking and to maintain maximum airflow, even after contact with aggressive and highly concentrated chemical formulations. Venting can be done through a hole in the cap (3FL-363) or through the threads of a cap without a hole (3FL-373).

The new 3FL cap liners feature a multi-layer construction with an ePTFE (polytetrafluoroethylene) membrane bonded across the face of the liner. This proprietary membrane allows gases to be released inside and outside the container, while preventing liquids from leaking out and contaminants from entering.  Both have the new advanced oleophobic membrane that is ideal for use with most aggressive and viscous formulations.

Both of the new cap liners are only 1 mm thick and repeatedly reseal in use. They can be installed like a traditional foam liner and are available in various slit widths.

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