Heat sealer

Small impulse sealer
Heat-sealed material lies on a warehouse floor. Notice the corded heat sealer to the left.
Heat sealer used to prepare plastic bag of lettuce for shelf life testing
Continuous band heat sealer

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.