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A study of recycling technology for paint-coated plastic automotive bumper
Institution:1. \"Stefan cel Mare\" Suceava University, Str. Universitatii nr.13, Suceava 720228, Romania;2. \"Dunarea de Jos\" Galati University, Str. Domneasca nr.47, Galati 6200, Romania;1. Environmental Applied Science & Management, Ryerson University, Toronto, Canada;2. Department of Mechanical & Industrial Engineering, Ryerson University, Toronto, Canada;1. Key Laboratory of Clean Chemical Processing of Shandong Province, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China;2. State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, PR China
Abstract:Our objective was to eliminate the harmful effect of paint films in recycled material. Our study focused on the molecular bonding in paint resin, and reached the following conclusions:
  • 1.(1) The use of a modifier allows the ether linkage in the paint film to be cleaved and its molecular structure changed. This resulted in improved compatibility between the paint and the material, rendering the paint film chips harmless.
  • 2.(2) Bumpers molded using modified recycled material meet requirements for mechanical properties, moldability, paintability and surface quality.
  • 3.(3) A continuous process where modification and pelletization are done simulataneously in a twin-screw extruder was achieved. This reduces the number of process steps and processing time, while providing improved productivity and economies.
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