TRANSPARENT INK-JET RECORDING FILMS, COMPOSITIONS, AND METHODS
Transparent ink jet recording films, compositions, and methods are disclosed. These films have improved appearance compared to other similar high optical density films. Such improved appearance films are produced without requiring reduced drying process throughput. These films are useful for medical imaging.
1 . A method, comprising:
applying at least one under-layer coating mix to a transparent substrate to form at least one under-layer disposed on the transparent substrate, said coating mix comprising gelatin and at least one borate or borate derivative;
applying at least one image-receiving layer coating mix to the at least one under-layer to form at least one image-receiving layer disposed on the at least one under-layer, said image-receiving coating layer comprising at least one water soluble or water dispersible polymer, at least one inorganic particle, and at least one surfactant; and
drying the at least one image-receiving layer using impingement air drying to form a transparent ink-jet recording film,
wherein the ratio of the gelatin and the at least one borate or borate derivative in the under-layer coating mix is between about 20:80 and 1:1 by weight, and further wherein the under-layer coating mix comprises at least about 4 wt % solids, and further wherein the ratio of the at least one inorganic particle to the at least one water soluble or water dispersible polymer is between about 90:10 and about 95:5 by weight.
2 . The method according to claim 1 , wherein the ratio of the gelatin and the at least one borate or borate derivative in the under-layer coating mix is about 0.45:1 by weight.
3 . The method according to claim 1 , wherein the at least one under-layer coating mix comprises at least about 9.2 wt % solids.
4 . The method according to claim 1 , wherein the at least one borate or borate derivative comprises borax.
5 . The method according to claim 1 , wherein the at least one water soluble or water dispersible polymer comprises poly(vinyl alcohol).
6 . The method according to claim 1 , wherein the at least one inorganic particles comprises boehmite alumina.
7 . The method according to claim 1 , wherein the ratio of the at least one inorganic particle to the at least one water soluble polymer is about 92:8 by weight.
8 . The method according to claim 1 , wherein the image-receiving layer coating mix comprises at least about 26 wt % solids.
9 . The method according to claim 1 , wherein the image-receiving layer has a coating weight of at least about 40 g/m 2 .
10 . A transparent ink-jet recording film produced according to the method of claim 1 .
11 . A transparent ink jet recording film, comprising:
a substrate;
at least one under-layer disposed on said substrate, said under-layer comprising gelatin and at least one borate or borate derivative; and
at least one image-receiving layer disposed on said at least one under-layer, said image-receiving layer comprising at least one water soluble or water dispersible polymer, at least one inorganic particle, and at least one surfactant,
wherein the ratio of the gelatin and the at least one borate or borate derivative is between about 20:80 and 1:1 by weight and the ratio of the at least one inorganic particle to the at least one water soluble or water dispersible polymer is between about 90:10 and about 95:5 by weight.
12 . The transparent ink-jet recording film according to claim 11 , wherein said at least one borate or borate derivative comprises borax.
13 . The transparent ink-jet recording film according to claim 11 , wherein said at least one water soluble or water dispersible polymer comprises poly(vinyl alcohol).
14 . The transparent ink jet recording film according to claim 11 , wherein said at least one inorganic particle comprises boehmite alumina.
15 . The transparent ink-jet recording film according to claim 11 , wherein the under-layer coating weight is at least about 4.2 g/m 2 on a dry basis and the image-receiving layer coating weight is at least about 41.3 g/m 2 on a dry basis.
16 . The transparent ink jet recording film according to claim 15 , wherein the maximum optical density is at least about 2.9.