A heat sealer is a machine used to seal products, packaging, and
other thermoplastic materials using heat. This can be with
uniform thermoplastic monolayers or with materials having
several layers, at least one being thermoplastic. Heat sealing
can join two similar materials together or can join dissimilar
materials, one of which has a thermoplastic layer. Types of heat
sealing - Hot bar sealers- have heated tooling kept at a
constant temperature (also known as Direct Contact Thermal
Sealing). They use one or more heated bars,Iron, or Dies which
contact the material to heat the interface and form a bond. The
bars, Irons, and Dies have various configurations and can be
covered with a release layer or utilize various slick interposer
materials (i.e. Teflon films) to prevent sticking to the hot
tooling. - Continuous heat sealers- (also known as Band type
heat sealers) utilize moving belts over heating elements. -
Impulse heat sealers- have heating elements (one or two) of
Nichrome placed between a resilient synt