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  • Q1: How does recycled RPET ensure food safety?
    A: Our food-grade RPET guarantees safety through:

    SSP (Solid-State Polycondensation) purification (230°C/N₂ atmosphere) with <0.5 ppm acetaldehyde

    FDA No Objection Letters (21 CFR 177.1630 compliance)

    Challenge Testing proving <0.1 ppb contaminant migration

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  • Q2: How is Melt Flow Index (MFI) controlled in recycled HDPE?
    A: MFI is precision-engineered via:

    Primary Recycling: 0.3-0.5 g/10min (rigid packaging)

    Modified Recycling: 1.0-3.0 g/10min (with antioxidants for injection molding)
    *Tested per ASTM D1238 at 190°C/2.16kg*

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  • Q3: What are GRS requirements for recycled content?
    A: Certification tiers:

    Certification RPET PCR HDPE PCR
    GRS Standard ≥20% ≥20%
    GRS Gold ≥95% ≥95%
    Validated through Transaction Certificates (TC) and supply chain audits

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  • Q4: Why is recycled RPET fiber strength lower than virgin PET?
    A: Key factors:

    Virgin PET: IV ≥0.85 dL/g → Tenacity ≥6.2 cN/dtex

    Recycled RPET: IV 0.75-0.82 dL/g → Tenacity 5.3-5.8 cN/dtex
    Solution: Molecular chain restoration with 0.5% chain extenders

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  • Q5: Can recycled HDPE be used for pressure pipes?
    A: Yes, when meeting:
    ✅ ASTM D3350 PE3408 classification
    ✅ ESCR >1,000 hrs (per ASTM D1693)
    ✅ Passes 4,000-hr hydrostatic strength testing (ISO 1167)
    Max. pressure rating: 1.6 MPa (PN16)

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  • Q6: How is recycled material authenticity verified?
    A: Triple-documentation system:

    GRS/RCS certificates with accredited body ID (e.g., CU 810619)

    ISO 14044-compliant LCA reports (cradle-to-gate)

    Third-party PCR verification (SGS/BV test reports)

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