Patent ID: 6051193
Filing Date: 2000-04-18
Classification: B01D,F01N,Y02T,Y10S,Y10T

Abstract:
A pollution control device comprising:(A) a housing;(B) a pollution control element disposed within the housing; and(C) a flexible intumesent sheet disposed between the housing and the element, said sheet comprising:(a) a first non-moldable flexible intumescent layer comprising a first intumescent material wherein said first intumescent material is unexpanded vermiculite ore, unexpanded treated vermiculite ore, partially dehydrated vermiculite ore, expanded graphite, expandable sodium silicate, or mixtures thereof; and(b) a second non-moldable flexible intumescent layer comprising a second intumescent material wherein said second intumescent material is unexpanded vermiculite ore, unexpanded treated vermiculite ore, partially dehydrated vermiculite ore, expanded graphite, expandable sodium silicate, or mixtures thereof, said first intumescent material and said second intumescent material being different, and said layers forming a single sheet without the use of auxiliary bonding means.