Comparing with the common doypack aluminium,we can find the material structure of aluminium spout pouch included one more layer-NYLON,so,why it need to add this layer?
So what will be happens if we let the aluminium spout pouch cancel this Nylon layer?
PE is a kind of plastic that only could resist 100℃in max and the heat sealing temperature of weldspout process is high(approx up to 120℃-130℃),when the temperature transmit through the layer of aluminum foil,80%-90% of temperature will be directly acted on the PE layer.
If the ratio of temperature transmission is unstable,it will cause below two situation:
(1)the temperature transmission is just right,the PE layer is intact.
(2)the temperature transmission is beyond 100℃,a partial of PE layer is“destroyed”and cause the pouch leakage problem.
Can we solve this problem by reducing the heat sealing temperature?Yes,but it will still cause another two situation:
(1)the temperature transmission is just right,and the PE layer is intact
(2)the temperature transmission is below 100℃ and PE layer can not be welded tightly with the spout neck,it will still cause the pouch leakage problem
Nylon is a kind of plastic with good heat resistance and heat transmission character,one side,it can be”protected” the PE layer,another side,it can let the spout pouch bags owned a better character against the impact force,so Nylon can be very good protection you spout pouch.