Does the dual heating model seal faster and stronger?
A12. No. While it is true that the dual heating type sealer may increase the sealing temperature, it does not necessarily mean that it will shorten the sealing time, especially for the impulse heat-fusion sealers. The two heating elements constructing the dual heating sealers are set to a lower temperature than that of a single-heating sealer, and its upper heating element is padded with a silicon rubber, which is resulting in a decrease of heat conductivity and an inefficient heat-release and cooling process. A dual heating type sealer takes as much time as a single-heating type sealer to heat, but the cooling time is longer, resulting in a slower overall sealing cycle. A note on using the dual-heater sealer: The dual-heating type sealer is suitable for gusset bags, requiring a thicker film sealing. The upper heating element is padded with rubber to enable the sealing of gusset bags. In a dual-heating type sealer, the upper heating element has lower heat conductivity and reduced heat-
