Intumescent stressed skin composite material
AssigneeMinnesota Mining and Manufacturing Company
InventorJames R. Close
Life of this patent
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Abstract
A composite or tape comprising a thin, flexible, compliant, strong, stressable substrate, a layer of flexible, resilient intumescent material adhered to the substrate and adhesive means for closing the substrate on itself. The composite or tape can be applied to a rigid body, the adhesive means applied and the intumescent material exfoliated to provide insulation enclosed by the substrate which becomes a stressed skin.
Claims10
A self-securing composite insulating wrapping comprising a first web of a thin, flexible, compliant, stressable material having a tensile strength of at least 1.75 kg/cm.sup.2, an adhesive substantially covering one face of said web and a second smaller web of resilient intumescent sheet material positioned and adhered to the adhesive covered surface of said web of flexible material with the long dimensions of the two webs parallel with the adhesive coated surface of said first web exposed along at least one edge of said second web, said wrapping when applied onto a base material being capable of exfoliation by thermal or chemical means to provide a thermal insulating layer on said base material overcoated by a protective stressed outer skin.
Dependencies are inferred from the claim text.