Molds & Tooling
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PET Heat-Resistant Bottle (Hot Filling) Deformation
Problem Phenomenon
Hot-filled bottles shrink and deform after being filled with hot water.
Cause Analysis
Ordinary PET bottles are not heat-set treated and have insufficient heat resistance; hot-fill bottles require a special heat-setting mold and crystallized neck.
Solution
①For hot-fill products, select the heat-setting process and heat-resistant bottle type; ②set the mold temperature according to the hot-fill process; ③verify hot-fill shrinkage.
Key Takeaway
Hot filling = special heat-resistant process; ordinary bottles cannot be substituted.
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