{"id":869,"date":"2026-05-15T03:54:03","date_gmt":"2026-05-15T03:54:03","guid":{"rendered":"https:\/\/isbm-blow-molding.com\/?p=869"},"modified":"2026-05-15T03:58:57","modified_gmt":"2026-05-15T03:58:57","slug":"isbm-heat-set-pet-engineering-hot-fill-crystallisation-korean-guide","status":"publish","type":"post","link":"https:\/\/isbm-blow-molding.com\/bg\/isbm-heat-set-pet-engineering-hot-fill-crystallisation-korean-guide\/","title":{"rendered":"ISBM Heat-Set PET Engineering: Korean Hot-Fill Guide"},"content":{"rendered":"
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Technical Deep Dive \u00b7 Heat-Set PET \u00b7 Korean ISBM 2026<\/p>\n

ISBM Heat-Set PET Engineering:
\nKorean Hot-Fill Guide<\/h1>\n

Standard PET deforms at 65\u00b0C \u2014 a serious limitation when Korean juice, tea, and sauce brands fill at 85\u201392\u00b0C. Heat-set ISBM crystallises the PET bottle wall to 28\u201338% crystallinity using a heated mould at 120\u2013160\u00b0C, raising the heat-distortion threshold to 90\u201398\u00b0C. Understanding the crystallisation engineering is what separates a bottle that withstands hot-fill from one that collapses on the filling line.<\/p>\n

Mould Temp: 120\u2013160\u00b0C<\/span>
\nCrystallinity 28\u201338%<\/span>
\n\u0394V \u2264 2% at 90\u00b0C Fill<\/span><\/div>\n

Korean Ever-Power Engineering Desk \u00b7 Ansan-si \u00b7 May 2026<\/p>\n<\/div>\n<\/header>\n

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Korean ISBM Heat-Set PET Parameter Reference \u2014 2026<\/p>\n

\n\n\n\n\n\n\n\n\n\n
\u041f\u0430\u0440\u0430\u043c\u0435\u0442\u044a\u0440<\/th>\nStandard HS-PET<\/th>\nHigh-Heat HS-PET<\/th>\nvs PP Hot-Fill<\/th>\nEngineering Reason<\/th>\n<\/tr>\n<\/thead>\n
Blow mould temperature<\/td>\n120\u2013140\u00b0C<\/td>\n145\u2013165\u00b0C<\/td>\n8\u201325\u00b0C (PP)<\/td>\nHeated mould crystallises PET while under blow pressure; PP uses cool mould<\/td>\n<\/tr>\n
Target crystallinity<\/td>\n28\u201332%<\/td>\n33\u201338%<\/td>\nN\/A (PP semi-cryst.)<\/td>\nHigher crystallinity \u2192 higher Tg and heat distortion temperature<\/td>\n<\/tr>\n
Blow-and-hold dwell<\/td>\n3.5\u20135.0 s<\/td>\n5.5\u20138.0 s<\/td>\n1.5\u20132.5 s (PP)<\/td>\nLonger dwell at higher mould temp drives crystallisation; major cycle time cost<\/td>\n<\/tr>\n
Max fill temperature<\/td>\n85\u201388\u00b0C<\/td>\n90\u201396\u00b0C<\/td>\n85\u201395\u00b0C (PP)<\/td>\nHigh-heat HS-PET enables premium hot-fill products requiring >88\u00b0C sterilisation<\/td>\n<\/tr>\n
\u0394V specification (hot-fill test)<\/td>\n\u2264 2%<\/td>\n\u2264 1.5%<\/td>\n\u2264 2% (PP)<\/td>\nVolume change after hot-fill and cooling \u2014 measures vacuum panel performance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

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