The present invention is put to use in automobile exhaust system parts Cationic glass fiber mat (glass fiber mat) relates to, and then cut the glass fibers of suitable composition to a specific length of the inter-woven manner by kneading (needing) onto the mat so as to have a specific weight the manufacture, and fiberglass mat of the present invention which comprises treating the surface of glass fiber heat-resistant inorganic binder, as well as to prevent the deterioration and thermal deformation of the peripheral part prevents the engine exhaust system for the transfer of the high temperature of the exhaust sound absorption also Best to put useful for reducing the use of extra sound absorbing material is temperature resistant glass fiber mat.
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