Polyurea RIM - The Choice for Automotive Body Panel Applications 890694
Tremendous interest has been generated in the application of polyurea RIM for exterior body panels. Since polyureas are more thermally stable than polyurethanes, they offer distortion-free parts including even on-line painted body panels.
New technology has been developed recently to improve the reaction profile of polyurea formulations, enabling the molding of large surface area panels on conventional RIM injection units.
The dimensional stability required for exterior body panels (especially the low CLTE) requires reinforcement with glass or mineral fillers. However, new applications have been somewhat restricted by limitations of the reinforcement technology: excessive orientation effect of properties; low impact strength; or distinctness-of-image (DOI) values lower than painted sheet metal.
This paper summarizes the improvements provided by Bayflex 150 DOI (high DOI polyurea), a new multiple-release polyurea RRIM formulation which incorporates novel reinforcement technology. This composite offers an extremely isotropic property profile, improved impact performance, and distinctness-of-image values of coated parts essentially identical to those of painted sheet metal.
Citation: Sanns, F., Taylor, R., and Kazubski, J., "Polyurea RIM - The Choice for Automotive Body Panel Applications," SAE Technical Paper 890694, 1989, https://doi.org/10.4271/890694. Download Citation
Author(s):
Frank Sanns, Ronald P. Taylor, James R. Kazubski
Affiliated:
Polyurethane Div. Mobay Corp.
Pages: 12
Event:
SAE International Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Plastics in Automobiles-Bumper Systems, Interior Trim, Instrument Panels, and Exterior Panels-SP-0772
Related Topics:
Body panels
Molding
Glass
Forming
Metals
Composite materials
Parts
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