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High-Scratch Resistant Polypropylene for Instrument Panels

Article of Honda R&D Technical Review Vol.15 No.1


In an effort to reduce cost and foster an all-olefin material direction, a polypropylene material has been developed to perform without paint in applications traditionally requiring paint. An existing instrument panel polypropylene’s scratch resistance has been enhanced by talc encapsulation, increased surface lubricity and reduced talc particle size. The additive loadings and types were balanced with physical property performance and material cost. Mold flow analysis and a sequential valve gate molding process were used to optimize the part appearance. The result is an impact-modified polypropylene with scratch characteristics equivalent to painted polypropylene with a minimal cost increase.


(1) Sakumoto, S.: Advanced and improved Scratch Technologies for Molded-in-color Polypropylene Interior Parts, ITB Automotive Interiors 2002, March, 2002.
(2) Wolske, K., Anthony, K., Pollo, M., Tan, F., and Taylor, S.: Effect of Composition on the Scratch Resistance of Filled TPOs, SPE Automotive Global TPO Conference 2001, October, 2001.
(3) Kamei, S.: Innovative Thermoplastic Paint Process, SAE Paper 2001-01-0360, March, 2001.

Author (organization or company)

Bryan CERRA(Honda R&D Americas, Inc.)、Corey MCENHILL(Honda R&D Americas, Inc.)

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