Film laminates as high barrier films and their use in vacuum insulation panels
First Claim
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1. Multi-layer film laminate having a first surface layer and a second surface layer, and comprising at least 4 layers (I) to (IV) arranged directly or indirectly in the following sequence:
- a) at least one thermoplastic polymer layer (I) as the first surface layer, vapor-coated with aluminum, whereby the vapor-coated surface is adjacent to the following layer, b) layer (II) as a gas barrier layer of an ethylene vinyl alcohol copolymer or polyvinyl alcohol, c) at least one further thermoplastic polymer layer (III), vapor-coated with aluminum and d) layer (IV) as a heat-sealable layer of a thermoplastic polymer, which is the second surface layer of the film laminate.
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Abstract
Multi-layer film laminate is described having at least 4 layers comprising at least one layer (I) as surface layer vapor-coated with aluminum or SiOx or a metal oxide from main groups 2 or 3, a gas barrier layer (II), at least one further layer (III) vapor-coated with aluminum or SiOx or a metal oxide from main groups 2 or 3 and a heat-sealable layer (IV), wherein the vapor-coated surface of layer (I) is adjacent to the following layer.
Their use as high gas barrier films as wrapping of vacuum insulation panels is also described.
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19 Claims
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1. Multi-layer film laminate having a first surface layer and a second surface layer, and comprising at least 4 layers (I) to (IV) arranged directly or indirectly in the following sequence:
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a) at least one thermoplastic polymer layer (I) as the first surface layer, vapor-coated with aluminum, whereby the vapor-coated surface is adjacent to the following layer, b) layer (II) as a gas barrier layer of an ethylene vinyl alcohol copolymer or polyvinyl alcohol, c) at least one further thermoplastic polymer layer (III), vapor-coated with aluminum and d) layer (IV) as a heat-sealable layer of a thermoplastic polymer, which is the second surface layer of the film laminate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification