Direct Heat Sealers
Our direct heat sealers (also known as constant heat sealers) are best suited to seal thicker material such as coated aluminum foil, Kraft paper, cellophane, mylar, or coated PP.  Please note that with the exception of our KF-150PS and band sealers, our direct heat sealers cannot seal polyethylene.  Depending on the model of the sealer, material up to 16" wide and 20 mil thick can be sealed.  We offer two types of seal designs:  meshed or serrated.  Seal widths vary from 10mm to 15mm wide.  Our direct heat sealers are equipped with a thermostat or an electronic temperature controller to accurately controls the temperature. Both jaws are heated simultaneously resulting in better heat penetration to seal thicker materials.

Easy to operate
Set the temperature on the temperature controller depending on the material to be sealed.  Once correct settings have been reached, press down on the foot pedal and release.

Function
Direct heat (constant heat) sealers maintain constant heat in both jaws.  Direct heat sealers use power as long as the machine is turned on.  As a result, direct heat sealers possess better heat penetration in order to seal thicker materials.  We recommend a direct heat sealer for materials such as coated aluminum foil, poly cello films, gusset bags, coated Kraft papers, waxed paper, cellophane, mylar, coated PP, and other thicker materials.  Direct heat sealers cannot seal polyethylene.

Size
The size of the sealer depends on the width of the material to be sealed.  We usually recommend adding one inch to the width of material to be sealed to determine sealer length for easier handling.  Cutters on the sealer usually trim at slightly less than width of the sealer arm.

Speed
See below for a general guideline on speed (packages per minute) of our impulse and direct heat sealers.