Heat foam insulation jacket

Abstract From the Canadian patent

A unitary removable and reuseable jacket for the thermal insulation of pipe accouterments is disclosed. The fully-formed generally-rectangular jacket is composed of three layers: a heat and water resistant outer fabric layer a hardened rigid-cell, polyurethane middle layer and a thin flexible heat-shrinkable, plastic inner layer. The inner and outer layers are joined together by perimeter seams and a transverse center seam which form two pockets adapted to contain the polyurethane foam middle layer. Said inner and outer layers are formed at time of manufacture while the middle layer is formed during the application process. During the application process an, exothermic chemical reaction is …