Metallized barrier material
A metallized barrier material comprising a base material, a metallized layer and a protective coating. The base material has a first surface and a second surface. The metallized layer is vapor deposited on the first surface of the base material to a desired optical density. The protective coating is applied to the metallized layer, wherein the protective coating comprises a butyl methacrylate or a combination of an epoxy component and an acrylic component wherein the epoxy component has an EEW of less than 800.
1 . A metallized barrier material comprising:
a base material having a first surface and a second surface;
a metallized layer vapor deposited on the first surface of the base material to a desired optical density;
a protective coating applied to the metallized layer, wherein the protective coating comprises a butyl methacrylate or a combination of an epoxy component and an acrylic component wherein the epoxy component has an EEW of less than 800.
2 . The metallized barrier material of claim 1 wherein the base material comprises one of a cellulosic based material or a biopolymer, a second protective coating applied to the first surface of the base material between the first surface of the base material and the metallized layer, in at least one layer.
3 . The metallized barrier material of claim 2 further comprising a third protective coating applied to the second surface of the base material.
4 . The metallized barrier material of claim 2 wherein the biopolymer comprises one of the group consisting of PLA, PHA, thermoplastic starch, and blends thereof.
5 . The metallized barrier material of claim 2 wherein the butyl methacrylate comprises one of the group consisting of a normal, iso and copolymer butyl methacrylate.
6 . The metallized barrier material of claim 2 wherein the acrylic component of the combination acrylic and epoxy protective coating comprises one of a butyl methacrylate, methyl methacrylate or an acrylic copolymer and the epoxy component of the combination acrylic and epoxy protective coating comprises a bisphenol A epoxy.
7 . The metallized barrier material of claim 2 wherein the acrylic component of the combination acrylic and epoxy protective coating comprises a glycidyl acrylic copolymer and the epoxy component of the combination acrylic and epoxy protective coating comprises a Tris(4-hydroxyphenyl)methane triglycidyl ether.
8 . The metallized barrier material of claim 2 wherein the optical density of the metallized layer comprises 2.5 to 3.5.
9 . The metallized barrier material of claim 1 wherein the base material comprises one of the group consisting of: PET, OPP, PE and blends thereof.
10 . The metallized barrier material of claim 1 wherein the epoxy component has an EEW of less than 600.
11 . The metallized barrier material of claim 1 wherein the butyl methacrylate comprises one of the group consisting of a normal, iso and copolymer butyl methacrylate.
12 . The metallized barrier material of claim 1 wherein the acrylic component of the combination acrylic and epoxy protective coating comprises one of a butyl methacrylate, methyl methacrylate or an acrylic copolymer and the epoxy component of the combination acrylic and epoxy protective coating comprises a bisphenol A epoxy.
13 . The metallized barrier material of claim 1 wherein the acrylic component of the combination acrylic and epoxy protective coating comprises a glycidyl acrylic copolymer and the epoxy component of the combination acrylic and epoxy protective coating comprises a Tris(4-hydroxyphenyl)methane triglycidyl ether.
14 . The metallized barrier material of claim 1 wherein the desired optical density of the metallized layer comprises 2.5 to 3.5.
15 . A method of making a metallized barrier material comprising the steps of:
providing a base material having a first surface and a second surface;
vapor depositing a metallized layer on the first surface of the base material, to a desired optical density;
formulating, in a solvent, a protective coating comprising a butyl methacrylate or a combination of an epoxy component and an acrylic component wherein the epoxy component has an EEW of less than 800;
applying the protective coating in a solvent onto the metallized layer; and
evaporating the solvent.
16 . The method of claim 15 wherein the base material comprises one of a cellulosic based material or biopolymer, the method further comprising the step of:
applying a second protective coating to the first surface of the base material before vapor depositing the metallized layer.
17 . The method of claim 16 wherein the step of applying a second protective coating comprises the steps of:
applying a first layer of the second protective coating to the first surface of the base material before vapor depositing the metallized layer; and
applying a second layer of the second protective coating to the first layer of the second protective coating before vapor depositing the metallized layer.
18 . The method of claim 16 further comprising the step of applying a third protective coating to the second surface of the base material.
19 . The method of claim 15 further comprising the step of:
adhering the metallized barrier material to a second substrate.
20 . The method of claim 19 wherein the second substrate comprises a cellulosic based material.