Extrusion & Post
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PET Bottle Insufficient Top Load Strength
Problem Phenomenon
Bottles deform after stacking, collapsed bottles.
Cause Analysis
Unreasonable wall thickness distribution (locally too thin), insufficient stretch orientation, excessive lightweight design; insufficient blowing pressure leads to insufficient orientation.
Solution
①Optimize wall thickness distribution (lamp zone adjustment); ②ensure high-pressure blowing orientation; ③top load test monitoring; ④verify top load while lightweighting.
Key Takeaway
Lightweighting forces top load management.
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