{"id":858,"date":"2026-05-14T06:43:55","date_gmt":"2026-05-14T06:43:55","guid":{"rendered":"https:\/\/isbm-blow-molding.com\/?p=858"},"modified":"2026-05-14T06:43:55","modified_gmt":"2026-05-14T06:43:55","slug":"isbm-resin-drying-engineering-korean-production-guide","status":"publish","type":"post","link":"https:\/\/isbm-blow-molding.com\/el\/isbm-resin-drying-engineering-korean-production-guide\/","title":{"rendered":"\u039c\u03b7\u03c7\u03b1\u03bd\u03b9\u03ba\u03ae \u039e\u03ae\u03c1\u03b1\u03bd\u03c3\u03b7\u03c2 \u03a1\u03b7\u03c4\u03af\u03bd\u03b7\u03c2 ISBM: \u039f\u03b4\u03b7\u03b3\u03cc\u03c2 \u03a0\u03b1\u03c1\u03b1\u03b3\u03c9\u03b3\u03ae\u03c2 \u039a\u03bf\u03c1\u03ad\u03b1\u03c2"},"content":{"rendered":"

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Technical Deep Dive \u00b7 Process Science \u00b7 Korean ISBM 2026<\/p>\n

ISBM Resin Drying Engineering:
\nKorean Production Guide<\/h1>\n

Inadequate resin drying is the root cause of more Korean ISBM defects \u2014 splay marks, IV loss, acetaldehyde generation, preform haze \u2014 than any single process parameter except conditioning temperature. The physics of moisture in PET, PETG, and Tritan at ISBM barrel temperatures demands systematic drying control that most Korean production operations treat as background utility rather than precision process step.<\/p>\n

PET Target: \u226450 ppm H\u2082O<\/span>
\nDew Point: \u2264 \u221230\u00b0C<\/span>
\n4h Min Drying at 165\u00b0C<\/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 Resin Drying Parameters \u2014 2026 Reference<\/p>\n

\n\n\n\n\n\n\n\n\n\n
\u03a1\u03b7\u03c4\u03af\u03bd\u03b7<\/th>\nDryer Temp.<\/th>\nMin. Drying Time<\/th>\nTarget Moisture<\/th>\nDew Point Req.<\/th>\nFailure Below Target<\/th>\n<\/tr>\n<\/thead>\n
PET (standard, IV 0.80\u20130.84)<\/td>\n160\u2013165\u00b0C<\/td>\n4 hours min<\/td>\n\u2264 50 ppm<\/td>\n\u2264 \u221230\u00b0C<\/td>\nIV loss, splay, AA generation<\/td>\n<\/tr>\n
PET (rPET blend 10\u201330%)<\/td>\n160\u2013168\u00b0C<\/td>\n5 hours min<\/td>\n\u2264 40 ppm<\/td>\n\u2264 \u221235\u00b0C<\/td>\nrPET higher moisture adsorption; faster IV degradation<\/td>\n<\/tr>\n
PETG<\/td>\n60\u201365\u00b0C<\/td>\n3\u20134 hours min<\/td>\n\u2264 100 ppm<\/td>\n\u2264 \u221225\u00b0C<\/td>\nHaze, clarity loss, tiger-line streaking<\/td>\n<\/tr>\n
Tritan (TX1001)<\/td>\n65\u00b0C<\/td>\n4\u20135 hours min<\/td>\n\u2264 50 ppm<\/td>\n\u2264 \u221230\u00b0C<\/td>\nMost sensitive: significant clarity\/strength loss; regrind not recoverable<\/td>\n<\/tr>\n
PP (random copolymer)<\/td>\n80\u201385\u00b0C<\/td>\n2 hours<\/td>\n\u2264 200 ppm<\/td>\n\u2264 \u221220\u00b0C<\/td>\nPP less hygroscopic; splay from moisture at high loading still possible<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

All drying times assume a properly sized dehumidifying hopper dryer at the stated temperature and dewpoint. Hot-air dryers (without desiccant) cannot reliably achieve PET and Tritan moisture targets in Korean summer conditions \u2014 dehumidifying dryers are mandatory for polyester resins.<\/p>\n<\/div>\n

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