How to choose materials for the stand up spout pouches.
How to judge whether a bag heat sealing strength of the good and bad?
by：Kolysen
2020-12-14
Viewed from the outside heat sealing, such as hot sealing end found a contraction, heat sealing bag making temperature on the high side, should be appropriate to reduce a little.
In principle, heat sealing temperature should be in the composite film under the outer membrane of heat setting temperature, and the sealing layer above the melting temperature of the resin.
Heat sealing temperature is higher, the greater the heat sealing strength, but more than the outer two-way stretch film heat setting temperature may result in shrinkage of seal end.
Heat sealing strength of simple identification method is put his hand into his pocket, and make an effort to opened the bag, such as push outward to strip away, the heat sealing is not good, like the strip does not open, is good.
If want to be in hot pincer-like device to tear, the tear film tore doesn't open heat sealing film, is good, otherwise it is not good.
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