Processing within the PUR cure window

Volume production of fiber-reinforced polyurethane sandwich structures for auto interiors is enabled by composite spray molding. This article takes a look at whether Class A exterior parts are next. A host of inherent processing and performance properties that could be advantageous to automakers is offered by polyurethane resin systems (PURs). Compared to polyesters and vinyl esters, they exhibit greater stiffness at lower weight. PUR's greatest asset was also its greatest liability - its almost instantaneous cure; but in recent years that has changed, with a reformulation to permit reasonable delays. A parallel development that adapts the molding process to a PUR system's inherent cure properties is a commercialized composite spray molding (CSM) that enables PUR to be used with large-part production, with a speed that is acceptable to the auto industry, as well as finished-part performance. Details of how this process can and has been adapted for use in automotive applications are presented, showing an evolution from automobile interiors to exteriors. Honeycomb sandwich parts are a staple of the future, as the trend towards lighter, safer automobiles is explored by the automotive industry.


  • English

Media Info

  • Media Type: Print
  • Features: Figures; Photos;
  • Pagination: pp 28-29, 31-33
  • Serial:
    • Composites Technology
    • Volume: 20
    • Issue Number: 2
    • Publisher: Gardner Publications Incorporated
    • ISSN: 1083-4117

Subject/Index Terms

Filing Info

  • Accession Number: 01523107
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 24 2014 11:58AM