A machine that is used to seal pieces of plastic material using heat is called a heat sealer. There are two main types of heat sealers:
Impulse Heat Sealers: Impulse heat sealers use a pulse of heat energy followed by cooling. Impulse heat sealers are used to seal containers composed of materials such as polyethylene and polypropylene. These materials will seal at fairly low temperatures.
Direct Heat Sealers: Direct heat sealers apply constant, direct heat. This enables them to seal containers made out of thicker material such as waxed paper, mylar, and cellophane.
Heat seals on containers are very strong. Heat sealing is the most commonly used method of sealing. Because heat sealing does not require extra materials such as adhesives, it is a very economical method to use.
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