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Estonian Journal of Engineering

Reprocessing technology of composite plastic scrap and properties of materials from recycled plastics; 105–116

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Jaan Kers, Priit Kulu, Dimitri Goljandin, Valdek Mikli


This study had two aims: to develop prospective techniques for recycling of composite plastic scrap and to find potential application areas for secondary raw materials. The method of collision was selected to treat composite plastic wastes, using a disintegrator mill. In our experi­ments, the particle size of acrylic plastic was reduced and glass fibres were separated. The paper describes the results of materials separation, granularity of the milled material and morphology of the plastic powder particles. To develop new filler materials for filler–resin systems, plastic powders with different granularity were used. Mechanical properties of new composite materials were examined. The developed new acrylic powder filler materials are prospective for use in the filler–resin systems to reinforce acrylic shells.


  1. Patel, M., von Thienen, N., Jochem, E. and Worrell, E. Recycling of plastics in Germany. Resources Conservat. Recycl., 2000, 29, 65–90.


  2. Subramanian, P. M. Plastics recycling and waste management in the US. Resources Conservat. Recycl., 2000, 28, 253–263.


  3. Okuwaki, A. Feedstock recycling of plastics in Japan. Polymer Degrad. Stabil., 2004, 85, 981–988.


  4. Smolders, K. and Baeyens, J. Thermal degradation of PMMA in fluidised beds. Waste Manag., 2004, 24, 849–857.


  5. Kang, H.-Y. and Schoenung, J. M. Electronic waste recycling: a review of U.S infrastructure and technology options. Resources Conservat. Recycl., 2005, 45, 368–400.


  6. Broekel, J. and Scharr, G. The specialities of fibre-reinforced plastics in terms of product lifecycle management. J. Mater. Process. Technol., 2005, 162–163, 725–729.


  7. Directive 2002/96/EC of the European Parliament and of the Council on waste electrical and electronic equipment (WEEE). Official Journal of the European Union, L37, 2003, 24–38.

  8. Rosato, D. Reinforced Plastics Handbook. Elsevier, Oxford, 2005.

  9. Tamm, B. and Tümanok, A. Impact grinding and disintegrators. Proc. Estonian Acad. Sci. Eng., 1996, 2, 209–223.

10. Kers, J. and Kulu, P. Retreatment of industrial plastic wastes by high energy disintegrator mills. In Proc. Global Symposium on Recycling, Waste Treatment and Clean Technology (Gabllah, I. and Mishra, B., eds.). Madrid, 2004, vol. 3, 2795–2797.

11. Kulu, P. and Tymanok, A. Treatment of different materials by disintegrator systems. Proc. Estonian Acad. Sci. Eng., 1999, 5, 222–242.

12. Tümanok, A. and Tamm, J. Choice of rational distribution function for describing of granulo­metry of ground material. Izv. Sib. Otd. Akad. Nauk SSSR, Khimiya, 1983, 6, 8–11 (in Russian).

13. Wojnar, L. Image Analysis: Applications in Materials Engineering. CRC Press LLC, Boca Raton, 1999.

14. EVS-EN ISO 6506-1:2006. Metallic materials – Brinell hardness test – Part 1: test method.

15. ASTM–G–65–94. Standard test method for measuring abrasion using the dry sand/rubber wheel apparatus, 1994.

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