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Dimensional Stability and Process Capability of an Industrial Component Injected with Recycled Polypropylene
José Eduardo Galve1, Daniel Elduque2, Carmelo Pina3
1BSH Electrodomésticos España, S.A., Avda. de la Industria, 49, 50016 Zaragoza, Spain. jose.galve@bshg.com.
Polymers
|June 23, 2019
Summary
Recycled polypropylene shows comparable dimensional stability to raw material under industrial conditions. This makes recycled polymers a viable, eco-friendly alternative for manufacturing, reducing costs and environmental impact.
Area of Science:
- Materials Science
- Polymer Engineering
- Sustainable Manufacturing
Background:
- Growing environmental concerns necessitate sustainable alternatives to virgin polymers.
- Recycled polymers offer a promising solution to reduce waste and manufacturing costs.
- Assessing the performance of recycled materials is crucial for industrial adoption.
Purpose of the Study:
- To systematically evaluate the dimensional stability of recycled polypropylene (PP) compared to raw PP.
- To analyze the impact of realistic environmental conditions on material performance.
- To determine the suitability of recycled PP for industrial applications, specifically in induction hob components.
Main Methods:
- Industrial samples of raw and 100% recycled polypropylene were manufactured identically.
- Samples were subjected to ejection, storage (50 °C), and extreme performance (80 °C) conditions.
- Dimensional changes were measured using a coordinate measuring machine and tactile probe.
- Process capability indices (Cp and Cpk) were calculated to assess manufacturing suitability.
Main Results:
- Recycled polypropylene exhibited minor differences in dimensional stability compared to raw material.
- These dimensional variations were attributed to alterations in the polymer structure.
- The differences observed did not significantly impact the injection molding process capability.
- Process capability indices confirmed the suitability of recycled PP for manufacturing.
Conclusions:
- Recycled polypropylene demonstrates acceptable dimensional stability for industrial use.
- The use of recycled PP is an effective strategy for reducing material costs and environmental footprint.
- Recycling polypropylene is a viable approach to sustainable manufacturing without compromising product performance.
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