A multi-layer flexible insulation (I) comprises a series of layers which include a pair of closed-cell insulation sheets (10,12) made of multicellular plastic film (i.e. closed cell air bubbles or bubble-pack) and laminated on both sides of a thin white polyethylene film (14), a pair of aluminum foil layers or films (16,18) adhesively mounted on the outer surfaces of the bubble-pack insulation sheets (10,12), and a pair of thin clear polyester layers (20,22) provided on the outer surfaces of the aluminum layers. The aluminum layers (16,18) are vapor deposited on the polyester layers (20,22) and are assembled to the hot bubble-pack insulation sheets (10,12) while the latter are cooled. The bubble-pack sheets (10,12) are then adhered to the central polyethylene film (14) with a hot melt glue. If the polyester (20,22) is highly smooth, the aluminum (16,18) can be deposited thereon in a uniform state thereby providing a high reflectivity, low emissivity, laminate. The outer polyester coatings (20,22) also protect the aluminum layers (16,18) such as to prevent any aluminum from rubbing off the insulation (I) and also prevent the aluminum layers (16,18) from oxidizing. Furthermore, the polyester coatings (20,22) provide an hygiene barrier for the insulation (I).
CROSS-REFERENCE
This application is a continuation of PCT/CA97/00625 filed on Sep. 3, 1997 designating the United States and claiming priority on U.S. application Ser. No. 08/706,288 filed on Sep. 4, 1996, now abandoned.
A multi-layer flexible insulation (I) comprises a series of layers which include a pair of closed-cell insulation sheets (10,12) made of multicellular plastic film (i.e. closed cell air bubbles or bubble-pack) and laminated on both sides of a thin white polyethylene film (14), a pair of aluminum foil layers or films (16,18) adhesively mounted on the outer surfaces of the bubble-pack insulation sheets (10,12), and a pair of thin clear polyester layers (20,22) provided on the outer surfaces of the aluminum layers. The aluminum layers (16,18) are vapor deposited on the polyester layers (20,22) and are assembled to the hot bubble-pack insulation sheets (10,12) while the latter are cooled. The bubble-pack sheets (10,12) are then adhered to the central polyethylene film (14) with a hot melt glue. If the polyester (20,22) is highly smooth, the aluminum (16,18) can be deposited thereon in a uniform state thereby providing a high reflectivity, low emissivity, laminate. The outer polyester coatings (20,22) also protect the aluminum layers (16,18) such as to prevent any aluminum from rubbing off the insulation (I) and also prevent the aluminum layers (16,18) from oxidizing. Furthermore, the polyester coatings (20,22) provide an hygiene barrier for the insulation (I).
A multi-layer flexible insulation (I) comprises a series of layers which include a pair of closed-cell insulation sheets (10,12) made of multicellular plastic film (i.e. closed cell air bubbles or bubble-pack) and laminated on both sides of a thin white polyethylene film (14), a pair of aluminum foil layers or films (16,18) adhesively mounted on the outer surfaces of the bubble-pack insulation sheets (10,12), and a pair of thin clear polyester layers (20,22) provided on the outer surfaces of the aluminum layers. The aluminum layers (16,18) are vapor deposited on the polyester layers (20,22) and are assembled to the hot bubble-pack insulation sheets (10,12) while the latter are cooled. The bubble-pack sheets (10,12) are then adhered to the central polyethylene film (14) with a hot melt glue. If the polyester (20,22) is highly smooth, the aluminum (16,18) can be deposited thereon in a uniform state thereby providing a high reflectivity, low emissivity, laminate. The outer polyester coatings (20,22) also protect the aluminum layers (16,18) such as to prevent any aluminum from rubbing off the insulation (I) and also prevent the aluminum layers (16,18) from oxidizing. Furthermore, the polyester coatings (20,22) provide an hygiene barrier for the insulation (I).
A lightweight multilayer heat reflective concrete cure blanket having a moisture-impervious top outer layer, a moisture-impervious bottom outer layer, and the top and bottom layers sealingly connected to each other at the boundaries of the layers to form a moisture-impervious chamber between the first and second layers. The chamber includes at least one bubble type insulative layer therein, and the bottom surface of the blanket comprises a heat reflective material to reflect heat emanating from the concrete when the blanket is placed over the concrete. In a further embodiment, heat reflective material is applied to at least one inner bubble type layer to reflect additional heat which radiates from the concrete through the insulative layer and back towards the concrete.
