This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Noble Materials for Thin-Walled Bumper Fascia with Enhanced Processibility and Dimensional Stability
Annotation ability available
Sector:
Language:
English
Abstract
A new noble material for automotive bumper fascia has been developed by compounding of ethylene-propylene block copolymers with ethylene-α-olefin copolymers and some additives. Also mineral fillers are added, if necessary. This material is suitable for injection molding of large parts including automotive bumper fascia. By using selected rubbers which have proper melt viscosity, molecular weight, and co-monomer content, and adding modified polymer containing polar group, it has enhanced processibility and paintability maintaining general properties such as tensile strength, impact strength at low temperature, and thermal and UV stability. The remarkable characteristics of this material is good processibility compared to the conventional TPOs. This material has especially high melt flow index(20∼30g/10min at 230°C) and stable flow behavior at the processing conditions. Furthermore, according to the results of CAE analysis, it is possible to reduce the injection pressure and clamping force of the injection molding machine. Another characteristic of this material is excellent dimensional stability. So, it is possible to reduce the wall thickness of the molded parts up to 2.5mm with proper dimensional stability.
Authors
Citation
Lee, S., Park, B., Yoo, Y., and Ji, S., "Noble Materials for Thin-Walled Bumper Fascia with Enhanced Processibility and Dimensional Stability," SAE Technical Paper 980105, 1998, https://doi.org/10.4271/980105.Also In
References
- Birley W. et al. “Physics of Plastics: Processing, Properties and Materials Engineering” 369 Hanser New York 1991
- Mathew N.M. Tinker A.J. J. Nat. Rubb. Res. 1 240 1986
- Dominggham D. “Plastics for Engineers” 105 Hanser Munich 1993
- Kim H.G. An J.H. Kim J.H. Polymer(Korea) 19 798 1995
- Hoppner D. Wendorff J.H. Colloid Polym. Sci. 268 500 1990
- Dao K.C. Polymer 25 1527 1984
- Kalfoglou N.K. Angew, Macromol. Chem. 129 103 1985
- “Automotive Bumpers 1994” 1 Phillips Townsend Associates Inc. Houston 1994
- Maxwell J. “Plastics in Automotive Industry” 106 Woodhead Publishing Ltd. Cambridge 1994
- “Automotive Plastics Report 94” Market research Inc. 1994
- Nishio T. et al. SAE 920525 121 1992
- Nomura T. et al. Kobunshi Ronbunshu 50 87 1993
- Walters K. “Rheometry: Industrial Application” 263 Research Studies Press Chichester 1980
- Grassley W.W. “Physical Properties of Polymers” Mark J.E. 136 ACS Washington 1984
- Minoshinma W. White J.L. Spruiel J.E. Polym, Eng, Sci. 20 17 1166 1980
- Wu S. Polym. Eng. Sci. 28 796 1988
- Urtaki L.A. “Two-phase Polymer System” 171 Oxford University Press New York 1991
- Hsu W.Y. Wu S. Polym. Eng. Sci. 33 5 293 1993
- Kim J.H. Keskkula H. Paul D.R. J Apple. Polym. Sci. 35 1563 1988
- Wu S. Polymer 26 1855 1985