date:Jun 03, 2014
tes faster to the outside due to the temperature difference between the support layer and the sealing layer so that the hot-tack resistance is significantly higher. Hot tack characterizes the strength of the joint immediately after termination of the thermal joining process without cooling. For vertical form, fill and seal (VFFS) machines in particular, high values are important since the seal joints are subjected to heavy loads through filling immediately after sealing.
Operators will sometim