Molding Process
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Insufficient Puncture Resistance of LDPE Film
Problem Phenomenon
Packaged contents puncture the film bag.
Cause Analysis
Insufficient film thickness and low toughness of the resin grade; toughness further decreases at low temperature.
Solution
①Thicken the film; ②blend LLDPE to improve toughness; ③select grades for low-temperature applications; ④do puncture verification.
Key Takeaway
Puncture resistance = thickness + grade toughness.
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