TRANSPARENT INK-JET RECORDING FILMS, COMPOSITIONS, AND METHODS
Transparent ink jet recording films, compositions, and methods are disclosed. These films exhibit high maximum optical densities and low haze values. Such films are useful for medical imaging.
1 . A method comprising:
providing a first composition comprising alumina, nitric acid, and water, said first composition comprising at least about 25 wt % alumina and comprising a pH below about 3.09;
forming an alumina mix according to a method comprising heating the first composition; and
forming an image-receiving layer from a second composition comprising said alumina mix and at least one first water soluble or water dispersible polymer.
2 . The method according to claim 1 , further comprising forming an under-layer from a third composition comprising at least one second water soluble or water dispersible polymer and a borate or borate derivative.
3 . The method according to claim 2 , wherein said at least one second water soluble or water dispersible polymer comprises poly(vinyl alcohol).
4 . The method according to claim 1 , wherein the alumina comprises boehmite alumina.
5 . The method according to claim 1 , wherein said at least one first water soluble or water dispersible polymer comprises poly(vinyl alcohol).
6 . The method according to claim 1 , wherein said first composition comprises at least about 30 wt % alumina.
7 . The method according to claim 1 , wherein said pH is below about 2.73.
8 . The method according to claim 1 , wherein said pH is between about 2.17 and about 2.73.
9 . The method according to claim 1 , wherein the alumina mix comprises at least about 25 wt % solids.
10 . The method according to claim 1 , wherein the alumina mix comprises at least about 30 wt % solids.
11 . The method according to claim 1 , wherein said heating the first composition comprises heating the first composition to about 80° C.
12 . A transparent ink-jet recording film comprising the image-receiving layer formed according to the method of claim 1 .
13 . The transparent ink-jet recording film of claim 11 , further comprising an under-layer formed from a third composition comprising a second water soluble or water dispersible polymer and a borate or borate derivative.
14 . The transparent ink-jet recording film of claim 13 , wherein said at least one second water soluble or water dispersible polymer comprises poly(vinyl alcohol).
15 . A method comprising printing on the transparent ink-jet recording film according to claim 12 .