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New Low MDI Polyurethane Foam System Replaces Heat Reactive Baffles in NVH Applications
Technical Paper
2000-01-1387
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
Low density polyurethane foam, applied in general assembly, is being used as a replacement for rubber-based heat reactive baffles in automobile cavities to inhibit noise transmittance. Most chemically reactive urethane foam systems used in barrier applications are MDI-based (diphenylmethane diisocyanate). The use of classical MDI-based technology in assembly plants typically requires substantial levels of ventilation [1]. High capital and operating expenses associated with plant ventilation systems have hindered the growth of polyurethane technology.
This paper describes benefits of using a low MDI polyurethane foam system in place of classical two-component MDI-based foam systems and conventional rubber-based heat reactive baffles. Severe industrial hygiene testing has indicated that ventilation requirements to use the low MDI foam system in assembly plants may be greatly reduced. Information presented includes industrial hygiene testing results, acoustical performance, foam design features, and physical/performance properties.
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Authors
Citation
Pearson, B., "New Low MDI Polyurethane Foam System Replaces Heat Reactive Baffles in NVH Applications," SAE Technical Paper 2000-01-1387, 2000, https://doi.org/10.4271/2000-01-1387.Also In
References
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- Saha, P. “The Need of Standardized Acoustical Evaluation Method for Body Cavity Fillers” Proceedings of the Automotive Body Interior & Safety Systems, International Body Engineering Conference 166 171 1995
- Visintainer A. Saha P. “Acoustical Study of Cavity Fillers for Vehicle Applications” Proceedings of the 1997 SAE Noise and Vibration Conference Traverse City, MI 503 509 May 20-22 1997