{"id":784,"date":"2026-05-13T03:33:11","date_gmt":"2026-05-13T03:33:11","guid":{"rendered":"https:\/\/isbm-blow-molding.com\/?p=784"},"modified":"2026-05-13T03:33:11","modified_gmt":"2026-05-13T03:33:11","slug":"rpet-iv-intrinsic-viscosity-management-isbm-korean-bottle-quality","status":"publish","type":"post","link":"https:\/\/isbm-blow-molding.com\/bs\/rpet-iv-intrinsic-viscosity-management-isbm-korean-bottle-quality\/","title":{"rendered":"IV Management in rPET ISBM: How Intrinsic Viscosity Drift Destroys Korean Bottle Quality"},"content":{"rendered":"
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\nK-EPR Compliance \u00a0\u00b7\u00a0 rPET Processing \u00a0\u00b7\u00a0 Technical Deep Dive 2026
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IV Management in rPET ISBM:
\nWhy Intrinsic Viscosity Drift Destroys Korean Bottle Quality \u2014 and the 5-Step Control Framework That Stops It<\/h1>\n

Korea’s K-EPR mandate requires 10% rPET now, 30% in 2027, and 50% by 2030. At each step, IV variance becomes a more serious production risk. Korean ISBM producers who have not built an active IV management system will face rising defect rates precisely when K-EPR compliance inspection pressure is at its highest.<\/p>\n

IV Range: 0.72\u20130.84 dl\/g<\/span>
\n5-Step Control Framework<\/span>
\nK-EPR 30% Ready 2027<\/span><\/div>\n

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K-EPR rPET Mandate Timeline \u2014 Korean ISBM Producer Reference<\/p>\n

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10%<\/div>\n
Jan 2026<\/div>\n
Current<\/div>\n<\/div>\n
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30%<\/div>\n
2027<\/div>\n
IV risk increases sharply<\/div>\n<\/div>\n
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50%<\/div>\n
2030<\/div>\n
IV management critical<\/div>\n<\/div>\n
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IV Variance Comparison<\/div>\n
Virgin PET: \u00b10.02 dl\/g<\/strong> (tight, predictable)
\nrPET non-SSP: \u00b10.08\u20130.12 dl\/g<\/strong> (wide, risk-prone)
\nrPET SSP-treated: \u00b10.04\u20130.06 dl\/g<\/strong> (manageable)<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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