Ocean Bound Recycled Polyethylene Terephthalate Pellets

1、Production Process and Core Parameters

- Raw Materials: Post-consumer PET bottles → Sorting → Crushing → Cleaning (removing labels/caps/impurities) → Drying → Melting → Modification (toughening/strengthening/compatibility/antioxidation) → Extrusion granulation → Finished product inspection.

- Drying: 120~150℃, 4~6h, strictly control moisture ≤0.05%, avoid bubbles/silver streaks. - Extrusion Temperature: 260~280℃ (segmented temperature control), low-shear screw to prevent degradation; die temperature 270~275℃, melt residence ≤5min.

- Physical Properties Reference (Typical Values): Density 1.37~1.40g/cm³; Melt Flow Index (280℃/2.16kg) 5~30g/10min; Tensile Strength 45~60MPa; Flexural Modulus 2000~2800MPa; Heat Deflection Temperature (0.45MPa) 75~85℃, adjustable according to customer requirements.

2、Product Advantages and Application Scenarios

- Advantages: Low carbon emissions (approximately 60% lower carbon content than virgin materials), customizable modification, stable quality, TC traceability available, suitable for export to markets with high compliance requirements such as the EU and North America.

- Applications: - Fiber/Textile: Spinning and yarn making → apparel fabrics, home textiles, bags, non-woven fabrics;

- Injection Molding/Blow Molding: Food contact packaging, appliance casings, automotive interior parts, 3C accessories;

- Extrusion: Sheets, plates, pipes, strapping, etc. IV. Molding Key Points and Common Problem Solutions

- Injection Molding Key Points: Proper drying (120℃, 4h); barrel temperature 260~280℃, mold temperature 30~50℃; injection pressure 80~120MPa, holding pressure 40~60MPa, back pressure 0.5~1.5MPa; cooling 15~30s to prevent deformation.

- Key Extrusion Techniques: Screw speed 30~60 rpm, uniform traction, cooling water temperature 25~40℃, reducing melt fracture and uneven shrinkage.

- Common Problems: - Silver streaks/bubbles: Enhance drying, reduce material temperature/back pressure;

- Discoloration/degradation: Shorten residence time, cool, clean screw;

- Uneven shrinkage: Increase mold temperature, optimize water channels, extend cooling time.

3、Procurement and Usage Recommendations

- Recycled Material Ratio: Pure RPET or RPET/virgin blend, recycled material ratio ≤30% (depending on product requirements), avoid multiple reuses.

- Mixing: Use materials of the same grade, avoid mixing with PC, ABS, etc., to prevent delamination/performance degradation.

- Certification: For export orders, confirm GRS/OBP and other certification requirements in advance, and require a TC certificate.