COMPRESSIBLE PREFORM INSULATING LINER

摘要

The invention provides a preform insulating end cone (30, 60) suitable for forming the end cone of a pollution control device (10), said preform (30, 60) comprising a cone shaped intumescent or non-intumescent sheet material (40) with or without a plurality of splits (49) enabling said sheet material (40) to be cone shaped and a shape retaining element in intimate contact with said intumescent sheet material (40), said shape retaining elements enabling said intumescent sheet material (40) to maintain a cone shape. The invention also provides methods of making preform insulating end cones (30, 60) of the invention.