There are two basic types of heat sealers for packaging, which work in different ways:-
CONSTANT HEAT: The sealing jaws remain at a constant temperature, which is pre-set by a control on the sealer linked to a thermostat. This type of sealer is used on all our in-house barrier foil conversion equipment because it gives a reliable seal strength even when used repeatedly for long periods. The sturdy and improved technology make them indispensible where mainly manual packing is required either for manufacturing of water- and air-tight transport and sea freight packing, and closing of bags and sacks.
Our HZ hand sealers are available with sealing lengths of 200, 300, 400 or 500mm, with a sealing width of 12mm. Connection cable 3m length, weight 1.3 up to 1.9 kg, depending on sealing bar length.
IMPULSE: The sealing jaws remain cool between sealing operations. When activated they heat up then cool again in a cycle which is normally adjustable for dwell time and temperature to suit various films. This type of sealer is used for single layer films such as polythene/polypropylene, which would simply melt in contact with a constant heat sealer. Used for packing of bulky machinery, control cabinets, measuring units, various small items etc. in film bags, for manufacturing of water- and air-tight transport and sea freight packing, as well as for sealing bags and sacks.
The SZ hand sealers are available with sealing lengths of 300, 400, 500 and 600mm, with a sealing width of 3mm. Connection cable 3m length, weight 1.4 up to 1.9kg depending on sealing bar length.
Protective Packaging Limited can supply, service and repair almost any type of heat sealer.