Polyurea Fascia with Mica Reinforcement - The Ultimate in Performance and Surface Quality

Paper #:
  • 920527

Published:
  • 1992-02-01
Citation:
Suddaby, B. and Sanns, F., "Polyurea Fascia with Mica Reinforcement - The Ultimate in Performance and Surface Quality," SAE Technical Paper 920527, 1992, https://doi.org/10.4271/920527.
Affiliated:
Pages:
6
Abstract:
Polyurea RRIM for automotive fascia offers all the advantages of Polyurethane RRIM, with improvements in processing and productivity. Polyurea also offers a visibly superior product, creating a better looking and more robust fascia for the customer. Polyurea's faster reactivity translates into improvements in green strength for the molder, allowing faster mold cycles and less scrap from tearing at demold. Polyurea's better dimensional stability produces fascia with clean, straight styling lines and less warping due to changes in temperature or humidity.With polyurethane systems, the selection of reinforcing fillers has meant either accepting nonuniform (anisotropic) physical properties with milled glass fibers or sacrificing surface appearance (as measured by DOI) with glass flake. Mica reinforced polyurethane suffers from poor green strength and is somewhat difficult to process. However, polyurea and mica reinforcements give the best of all combinations; excellent processing, isotropic physical properties, and DOI ratings approaching those of painted steel.
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