Venting of insulation foam gasses while keeping foam in place is a common manufacturing challenge in refrigerators and freezers and other appliance applications.
3M™ Venting Tapes 394, 3294 and 3394 are used to cover openings in the cabinet of refrigerators and freezers during the foam-in-place manufacturing process. These tapes allow air and gases to escape while keeping solids (such as urethane foam) in place. The air-permeable, non-woven backings of 3M™ Venting Tapes keep foam-in-place insulation inside door and appliance cavities, while helping eliminate voids. Related Products 3M™ Venting Tape 3294 is the most permeable venting tape, compared to 3M™ Venting Tapes 394 and 3394, which also have an air-permeable backing. Related Product Ideas Venting tape applications in freezers and vending machines that use the foam-in-place process. Key Application Requirements Tape must be easy to apply and allow foam to outgas during the foam-in-place process.