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Why do plastic bags need to be punched?

2018-12-14 16:23:26

There are plastic bags that are specified for toys to a certain size and must be punched. Prevent children from slipping into the head and suffocating while playing.
The general packaging plastic bag does not need to be perforated, but in order to release the air inside the bag after sealing and avoid the space occupied by the air, the hole is vented. The stomata are usually hit in the bag.
There is also a round hole or a butterfly-shaped hole on the top of the bag, which is used for hanging, called a hanging hole.
It has nothing to do with the specification, mainly because of its use.



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