Laminated insulation blanket

Claim 1

A flexible jacketed thermal insulation blanket which consists essentially of: a. a flexible thermal insulation element comprising at least one layer of mass type thermal insulation of low thermal conductivity and which is flexible in at least one direction; and adhered thereto in a laminar relationship; b. a flexible jacket element consisting essentially of; i. a vapor barrier layer consisting essentially of a first polymeric film having deposited on the interior face thereof a thin coating of a reflective metal, said polymeric film being selected from the group consisting of polyester and halocarbon polymeric film; ii. a fibrous insulating layer consisting essentially of asbestos fiber reinforced with an open mesh scrim cloth; and iii. an exterior layer consisting essentially of a second polymeric film selected from the group consisting of halocarbon and acrylic polymeric films; the uncoated face of said first polymeric film being adhered to said thermal insulation element, the metal coated face of said first polymeric film being adhered to one face of said fibrous insulating layer, and the other face of said fibrous insulating layer being adhered to said second polymeric film.