Patent ID: 7033412

Claim:
A device for treatment of exhaust gases comprising: a housing; a fragile structure resiliently mounted within said housing; and a non-intumescent mounting mat disposed in a gap between said housing and said fragile structure, wherein said mounting mat includes melt-formed, leached, and heat treated glass fibers containing at least 67 percent by weight silica wherein said mounting mat exerts a minimum holding pressure for holding said fragile structure within said housing of one of (i) at least about 10 kPa after 1000 cycles of testing at a hot face temperature of about 900° C., a gap bulk density of from about 0.3 to about 0.5 g/cm 3 , and a percent gap expansion of about 5 percent, or (ii) at least about 50 kPa after 1000 cycles of testing at a hot face temperature of about 300° C., a gap bulk density of from about 0.3 to about 0.5 g/cm 3 , and a percent gap expansion of about 2 percent.