It works by applying surges in heat to the material in its jaws, followed by a cooling period. This cooling period is when the strong seal is formed. Once enough time has elapsed to melt together the seal, the bag can be removed. The sealer then reboots to repeat another sealing action when the clamp is pushed down on the next bag to be sealed.
A heat sealer is an appliance used to heat thermoplastics to form a seal. Heat conduction in heated seal heads or sealing bars close film to film to form leak-proof seals for bags, pouches, cups, trays and other packaging.
It depends on the sealer. Impulse sealers work well with polyethylene and polypropylene bags. Constant heat sealers work well with thick materials such as gusset bags, poly cello films, coated Kraft papers, cellophane, waxed paper, mylar and coated polypropylene.
It depends on the width of your seals. You need a heat sealer with jaws that are at least 20-50mm wider than your bag opening. One seal is all you need and if your sealer is smaller than the area you need to seal you will be wasting time with double sealing.
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