LOOSE FILL INSULATION EXHAUST GAS TREATMENT DEVICE AND METHODS OF MANUFACTURING

摘要

An exhaust gas treatment device which includes an outer layer an inner layer that is at least in part disposed within the outer layer and a loose fill insulation disposed in the volume between the outer layer and the inner layer where a piece of fiber mat is disposed between the outer layer and the inner layer and forms a barrier that at least partially prevents the loss of the loose fill insulation from the volume between the outer layer and the inner layer and a manufacturing method that includes placing a loose fill insulation into the volume of space between an inner layer and an outer layer and positioning a piece of fiber mat between the outer layer and the inner layer to form a barrier that at least partially prevents the loss of the loose fill insulation from the volume of space between the outer and inner layers.