rPET-behandling i ISBM: Den komplette guide til koreanske producenter i 2026

1. Korea K-EPR Regulation: 2026 Timeline

On September 16, 2025, South Korea’s Cabinet approved the amendment to the Enforcement Decree of the Resource Recycling Act, making recycled PET content legally mandatory for major beverage producers. The regulation took effect January 1, 2026 and marks Korea’s transition from voluntary sustainability commitments to enforceable circular economy requirements for the bottled beverage sector.

The regulation structure unfolds in three phases over 2026-2030, progressively expanding both scope and required content percentage.

The regulation applies specifically to colorless PET bottles for bottled water and non-alcoholic beverages. Colored bottles, pharmaceutical containers, cosmetic bottles, and food jars are currently outside the mandatory scope, though Ministry of Climate, Energy and Environment (MCEE) guidance indicates likely expansion over 2026-2030.

Korean market impact estimates indicate approximately 17,500 tons of rPET consumption in 2026 under Phase 1 requirements. Initial compliance obligation falls on roughly 10 major producers including Coca-Cola Korea, Lotte Chilsung Beverage, and Jeju Samdasoo. Secondary obligation extends through contract fillers and private label producers serving these brands.

The compliance framework requires dual certification: first, process certification covering collection, sorting, and recycling (ensuring chain-of-custody traceability); second, food-contact safety certification confirming the rPET meets purity standards for direct beverage contact. Only dual-certified rPET is eligible for inclusion in the mandatory content calculation.

2. rPET Grades and Quality Tiers

Not all rPET is created equal. Korean producers evaluating supply must understand the three primary grades and their respective processing behavior.

For K-EPR compliance, only food-contact certified rPET qualifies toward the 10% mandatory content. This grade typically uses a combination of mechanical recycling and chemical recycling (depolymerization) to restore molecular integrity and remove contamination. The IV value of 0.74-0.78 is slightly below virgin PET but remains well within the processing window for commercial ISBM production.

Korean bottle-to-bottle closed-loop systems are currently scaling up capacity. SK geocentric and Lotte Chemical lead domestic supply, with imported certified rPET from Indorama, Far Eastern New Century, and Alpek Polyester filling additional demand during the supply ramp.

3. Technical Processing Challenges

rPET exhibits four technical differences from virgin PET that affect ISBM processing behavior. Understanding these differences is the foundation of successful compliance implementation.

Reduced IV Value

Intrinsic viscosity (IV) measures polymer chain length and directly correlates to melt strength, bottle strength, and gas barrier. Virgin PET targets 0.80-0.82 for beverage applications. Food-contact rPET typically arrives at 0.74-0.78, which is 5-8% below virgin baseline. This differential affects biaxial orientation during stretching and can reduce bottle top-load strength 3-7% at 10% rPET blend ratio.

Color Shift (Yellow b* Value)

Mechanical recycling processes expose PET to repeated thermal cycles that produce subtle yellow tint. The CIELAB b* value (measuring yellow-blue axis) typically shifts 1.5-3.0 units compared to virgin PET. At 10% blend ratio, the finished bottle yellow shift is imperceptible to most consumers. At 30% and higher blend ratios, yellow tint becomes noticeable and requires optical brightener additives or blue toner to compensate.

Black Specks and Contamination

Mechanical recycling carries forward micro-contamination from collection stream including polyolefin caps, label adhesive residue, and colorant pigments. Food-contact certified rPET uses melt filtration (typically 60-80 micron) to remove visible particulates, but occasional black specks or gel inclusions can appear in finished bottles. Incidence typically 1-3 per 10,000 bottles at 10% blend ratio.

Moisture Sensitivity

rPET absorbs moisture more aggressively than virgin PET due to slightly higher residual crystallinity in the pellet state. Drying parameters must be adjusted to ensure moisture reaches the <50 ppm target before processing. Inadequate drying causes hydrolysis during processing, further degrading IV value and amplifying yellow tint.

4. ISBM Parameter Adjustments for rPET

Successfully processing rPET requires adjustments to five parameter groups compared to virgin PET baseline. The following table shows recommended adjustments at different blend ratios.

The barrel temperature reduction is counterintuitive but critical. Higher processing temperature accelerates thermal degradation of the rPET polymer chains, amplifying both IV value drop and yellow tint. Reducing barrel temperature 3-5°C maintains rPET integrity while sacrificing minimal processing throughput. For detailed defect diagnosis during rPET transition, see 15 Common ISBM Bottle Defects and How to Fix Them.

5. Blending Strategy: 10% / 30% / 50% / 100%

Korean producers face strategic decisions about blend ratio that extend beyond minimum regulatory compliance. Four blend strategies serve different business objectives.

Most Korean producers are implementing 10% blend at minimum compliance in 2026, with strategic pilots at 30% for selected SKUs preparing for 2030 transition. A structured approach allows gradual supply chain scaling and operational learning before full mandate expansion.

6. Korean rPET Supply Chain

Korean rPET supply infrastructure is expanding rapidly to meet 2026 compliance demand. Four categories of supply serve the domestic market.

Primary Domestic Suppliers

SK geocentric (formerly SK Chemicals) operates integrated PET production and recycling with food-contact certified rPET capacity expanding through 2026-2028. SK geocentric is the largest Korean domestic supplier and serves major beverage producer closed-loop programs.

Lotte Chemical operates parallel PET and rPET production, supplying both domestic beverage brands and export markets. Lotte Chemical’s closed-loop partnership with Lotte Chilsung provides bottle-to-bottle recycling capacity for Lotte’s own beverage portfolio.

Import Supply

During the 2026-2027 supply ramp, imported certified rPET fills gaps between domestic supply and demand. Common import sources include Indorama Ventures (Thailand), Far Eastern New Century (Taiwan), and Alpek Polyester (Mexico). Food-contact certification verified at border inspection before market entry.

Collection Infrastructure

Korea’s collection infrastructure rests on the established deposit-refund and municipal separation system. Clear PET bottles entering food-contact rPET stream require separated collection, colorant removal, and mechanical recycling with chemical recycling step for food-contact approval. Korean Ministry of Climate, Energy and Environment certifies specific recyclers meeting food-contact purity standards.

Pricing Dynamics

Food-contact certified rPET typically prices at 15-25% premium to virgin PET during 2026 supply constraint period. As supply scales to meet mandatory demand, price premium is expected to compress to 5-15% by 2028. Producers should expect 1,400-1,700 KRW per kg for certified rPET during 2026-2027, with supply contracts increasingly structured as multi-year volume commitments to ensure stability.

7. Ever-Power Platform Compatibility

All Ever-Power ISBM platforms handle rPET content up to 100% through standard parameter adjustments. No platform modification or equipment retrofit is required for K-EPR compliance at 10% or 30% blend ratios. Specific platforms are recommended based on bottle application and production scale.

Full-servo platforms like HGY150-V4-EV offer measurable advantage for rPET processing because precise temperature control reduces thermal stress on the lower-IV rPET polymer chains. Hydraulic platforms can process rPET but typically show 0.2-0.4 percentage points higher scrap rate at the same blend ratio due to parameter drift through production shifts.

8. Cost Economics Analysis

rPET compliance adds measurable cost compared to virgin PET production. For a typical 500ml water bottle producer operating at 50 million units per year, the financial impact at 10% blend ratio breaks down as follows.

For the typical major producer affected by Phase 1 mandate (5,000+ ton annual PET use), the compliance cost runs approximately 200-300M KRW at 10% blend ratio. This cost is typically absorbed through marginal retail price adjustment (1-2 KRW per bottle) or operational efficiency gains elsewhere in production. For 30% blend ratio, cost impact scales to 600-900M KRW annually.

Longer-term economics favor rPET as supply scales. Virgin PET is subject to oil price volatility and petrochemical feedstock constraints. Certified rPET is increasingly price-competitive with virgin PET as Korean collection infrastructure matures through 2026-2028. By 2030, many market analysts expect certified rPET to achieve price parity with virgin PET, eliminating the current cost premium.

9. 90-Day Compliance Roadmap

For Korean producers not yet fully compliant with Phase 1 mandate, the following 90-day implementation roadmap provides structured progression from regulatory assessment through full production integration.

Days 1-30: Regulatory Assessment & Supply Sourcing

• ▸Confirm K-EPR obligation status (production volume vs 5,000 ton threshold)
• ▸Identify certified rPET suppliers (SK geocentric, Lotte Chemical, import options)
• ▸Request food-contact certification documentation from suppliers
• ▸Secure initial 10-20 ton trial batch for parameter optimization
• ▸Update procurement contracts to include certification requirements

Days 31-60: Pilot Production & Parameter Tuning

• ▸Run pilot batches at 10% blend ratio on one production line
• ▸Verify drying parameter adjustment (170°C, 5-6 hours)
• ▸Measure bottle quality: wall thickness, top-load, drop test, color b* value
• ▸Document baseline scrap rate and defect profile vs virgin PET control
• ▸Fine-tune barrel temperature (-3-5°C from baseline) and cycle time

Days 61-90: Scale to Full Production & Documentation

• ▸Deploy optimized parameters across all production lines
• ▸Establish multi-year supply contract with primary rPET supplier
• ▸Build compliance documentation system: certificates, batch traceability, monthly reporting
• ▸Prepare sustainability marketing communication (if applicable)
• ▸Plan Phase 2 readiness (30% blend ratio pilot by 2028)

10. Ofte stillede spørgsmål

11. Konklusion

Korea’s K-EPR mandate marks the transition from voluntary sustainability commitments to enforceable circular economy requirements for the PET bottle sector. Producers exceeding 5,000 ton annual PET consumption must integrate 10% certified rPET content starting January 1, 2026, with thresholds expanding to 1,000 tons and 30% content by 2030.

The technical implementation is well-established. rPET processes on standard Ever-Power ISBM platforms through parameter adjustments covering drying temperature, barrel temperature, and cycle time. The most common operator concern (whether equipment modification is required) is answered by no in the vast majority of cases. The remaining challenges are supply chain management (securing certified rPET at required volumes), quality control (verifying consistent IV value and color across batches), and documentation (maintaining traceable compliance records for regulatory audit).

Korean producers approaching K-EPR compliance through structured 90-day implementation typically achieve full production integration with minimal quality or economic disruption. The strategic decision for forward-thinking brands extends beyond minimum compliance to include 30% blend ratio pilots for selected SKUs, positioning for 2030 mandate expansion and ESG brand leadership in the meantime.