Shrink Film heat sealing temperature directly affects the heat sealing strength of plastic composite packaging products. In packaging or bagging process, if the heat sealing temperature is not appropriate or improper adjustment, there will be the following two cases: 1. When the heat sealing temperature is too high, more than the composite film surface layer of the heat shrink temperature, will cause the composite film shrinkage deformation, resulting in composite film and heat sealing knife between the adhesion, heat sealing edge material melt extrusion root cutting phenomenon. 2. When the temperature is too low, there will be bad heat sealing phenomenon. Therefore, in the actual production should pay attention to the following two points: firstly, in the selected composite structure, the combination of surface layer material and its thickness and heat sealing layer material should be reasonable. Secondly, set the temperature according to the plastic composite flexible packaging material, structure, thickness, speed, pressure and so on. BRJ Company is the best manufacturer and supplier of POF shrink film, Cross Linked Film in China, more information, welcome to contact us.