EXTRUSION LAMINATE USEFUL IN INSULATION FACINGS AND TAPE BACKINGS
A facing or backing, that comprises a laminated film including an outside layer, a core layer, and an inside layer; a scrim, a laminating extrudate and a metal foil wherein at least the laminated film has an opacity and stiffness similar to paper and contains a fire retardant. In one embodiment, the structures are designed to replace the traditional ASJ (all service jacket) and FSK (foil scrim kraft) paper laminations that are used in insulation facings and HVAC tapes.
1 . A structure, such as a facing or backing, that comprises a laminated film including an outside layer, a core layer, and an inside layer; a scrim, a laminating extrudate and a metal foil wherein at least the laminated film has an opacity and stiffness similar to paper and contains a fire retardant.
2 . The structure of claim 1 wherein at least the outside layer is formed from an extrudate of HDPE and a fire retardant.
3 . The structure of claim 2 wherein the extrudate for at least the outside layer contains a white pigment such as talc or titanium dioxide or a brown pigment.
4 . The structure of claim 3 wherein the laminating extrudate contains a combination of LDPE, an acrylic acid copolymer, and a fire retardant.
5 . The structure of claim 4 wherein both the outer and inner layers are formed from an extrudate of HDPE and a fire retardant.
6 . The structure of claim 1 wherein at least the outside layer contains a combination of HDPE, a white pigment and a fire retardant and the film has a stiffness comparable to paper.
7 . The structure of claim 1 wherein the core layer contains LDPE, HDPE, and a fire retardant.
8 . The structure of claim 1 wherein the outside layer contains a combination of HDPE, a brown pigment and a fire retardant and the laminate has a stiffness comparable to kraft paper.
9 . The structure of claim 1 wherein the metal foil is aluminum.
10 . The structure of claim 1 that comprises a coextruded laminar film of an outside layer, a core layer, and an inside layer, a scrim, a laminating adhesive, and aluminum foil wherein the inside, core, and outside layers are extrudates of HDPE and a fire retardant, the outside layer additionally contains a white pigment or a brown pigment, and the laminating extrudate contains LDPE and an acrylic copolymer for adhering the HDPE film and the aluminum foil.
11 . The structure of claim 10 suitable for use as a facing for insulation or a HVAC tape.
12 . A tape having a backing in accordance with claim 1 .
13 . Insulation having a facing in accordance with claim 1 .