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Versatile Polypropylene Composite Containing Post-Printing Waste.

Krzysztof Moraczewski1, Tomasz Karasiewicz1, Alicja Suwała1

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Polymers
|December 23, 2022
PubMed
Summary

This study explores using waste from label backing as a filler in polypropylene. Results show this recycled filler enhances material properties without significant drawbacks, offering cost-effective solutions.

Keywords:
circular economypolypropylenepost-printing waste

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Area of Science:

  • Materials Science
  • Polymer Engineering
  • Waste Valorization

Background:

  • Printing processes generate significant waste, including label backing materials.
  • Polymeric materials often require fillers to modify their properties and reduce costs.
  • Sustainable alternatives for fillers are crucial for environmental and economic benefits.

Purpose of the Study:

  • To investigate the feasibility of utilizing waste from label backing as a filler for polypropylene.
  • To characterize the processing, mechanical, and thermal properties of polypropylene composites containing this recycled filler.
  • To assess the potential of these composite materials for various applications.

Main Methods:

  • Preparation of filler from waste label backing (washing, drying, pressing, cutting).
  • Incorporation of the prepared filler into polypropylene at different volume ratios (2:1 to 1:3, approx. 10-2 wt%).
  • Evaluation of material properties including mass flow rate, tensile strength, impact strength, dynamic mechanical analysis, thermogravimetric analysis, and differential scanning calorimetry.

Main Results:

  • The addition of label backing waste filler did not lead to disqualifying changes in the tested properties, even at the highest filler content (approx. 10 wt%).
  • Processing, mechanical, and thermal characteristics of the polypropylene composites were determined across various filler concentrations.
  • The prepared filler was found to be compatible with polypropylene, maintaining desirable material attributes.

Conclusions:

  • Waste from label backing can be effectively used as a filler in polypropylene.
  • The resulting composite materials exhibit suitable properties for diverse applications.
  • Incorporating this low-cost filler offers a viable strategy for reducing production costs and promoting circular economy principles.