The Deleterious Effects of Organic Binder on Intumescent Mat Mount Material

2008-01-0452

04/14/2008

Event
SAE World Congress & Exhibition
Authors Abstract
Content
For decades, ceramic fiber mats have been used to mechanically support substrates in catalytic converters. Intumescent mats, those that expand with heat, are composed primarily of ceramic fibers, vermiculite, and organic binder. The binder is required for manufacturing, handling, and installation. Unfortunately, under cool operating conditions, its effects on mat performance are often negative.
While residual binder is not an automatic precursor to premature failure, it can amplify the effects of other factors such as gap control and vibration. As the mat mount material is heated, sections can become soft and pliable. In the absence of sufficient heat for complete binder removal, regions of the mat may become rigid during the cooling cycle. This results in a decrease in mat resiliency.
Several tests can be used to show the relationship between binder level and material performance. These tests typically characterize expansion properties and pressure performance. By comparing test results of intumescent mats with various binder levels, one can quantify the deleterious effects of residual binder on mat performance.
This paper will present a possible failure mode associated when residual binder and other aggravating factors are present. It will also present how an intumescent mat with less binder can lead to improved mat performance.
Meta TagsDetails
DOI
https://doi.org/10.4271/2008-01-0452
Pages
7
Citation
Brunner, N., De Rovere, A., Fischer, P., and Shirk, R., "The Deleterious Effects of Organic Binder on Intumescent Mat Mount Material," SAE Int. J. Mater. Manf. 1(1):228-234, 2009, https://doi.org/10.4271/2008-01-0452.
Additional Details
Publisher
Published
Apr 14, 2008
Product Code
2008-01-0452
Content Type
Journal Article
Language
English

Journal