Polypropylene Processing – Everything You Need to Know About It Polypeth Ekspor Indonesia July 15, 2022
Polypropylene Processing – Everything You Need to Know About It

Polypropylene can be processed virtually by all processing methods. The most typical processing methods include: Injection Molding, Extrusion, Blow Molding and General-Purpose Extrusion.

  1. Injection Molding
  • Melt temperature: 200-300°C
  • Mold temperature: 10-80°C
  • Drying is not necessary if stored properly
  • High mold temperature will improve brilliance and appearance of the part
  • Mold shrinkage lies between 1.5 and 3%, depending on processing conditions, rheology of the polymer and thickness of the final piece

    2. Extrusion (tubes, blow and cast films, cables, etc.)
  • Melt temperature: 200-300°C
  • Compression Ratio: 3:1
  • Cylinder Temperatures: 180-205°C
  • Pre-Drying: No, 3 hours at 105-110°C (221-230°F) for regrind

    3. Blow molding
    4. Compression molding
    5. Rotational molding
    6. Injection blow molding
    7. Extrusion Blow Molding
    8. Injection stretch blow molding
    9. General-Purpose Extrusion

Expanded Polypropylene (EPP) may be molded in a specialized process. Being an ideal material for injection molding process, it is majorly used for batch and continuous production.

PP is 100% recyclable. Automobile battery cases, signal lights, battery cables, brooms, brushes, ice scrapers, etc., are few examples which can be made from recycled polypropylene (rPP).

The PP recycling process mainly includes melting of waste plastic to 250°C to get rid of contaminants followed by removal of residual molecules under vacuum and solidification at nearly 140°C. This recycled PP can be blended with virgin PP at a rate upto 50%. The main challenge in PP recycling is related to its amount consumed – currently nearly 1% PP bottles are recycled as compared to 98% recycling rate of PET & HDPE bottles together.

The use of PP is considered safe because it does not have any remarkable effect from an occupational health and safety point of view, in terms of chemical toxicity.

Our recycled Polypropylene (PP) granules are 100% made from post consumer and industrial waste material. It’s packed in a 25kg durable brown paper sack with monthly capacity up to 30mt. Kindly contact us to find out more about our recycled Polypropylene granules.

Polypeth Ekspor Indonesia is a supplier and export recycled plastic pellets (HIPS & PP) from Indonesia. We work with plastic recycling manufacturers with years of experience to provide and ensure high quality & the safety of our recycled plastic pellets. Together we reduce the use of virgin plastic resin and reduce the waste of virgin plastic pollution.
To find out more about Polypeth Ekspor Indonesia’s products and services, speak to the team by clicking here.

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