Release films
AssigneeQinetiq Limited
InventorsAndrew Martin Pitt, David Edward Higgins
Life of this patent
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Abstract
This invention relates to the use of vermiculite and layer minerals in general release films.
Claims14
A release film having a layer of material comprising a metal or metal-containing compound deposited thereon, said release film comprising a substrate coated on at least one surface thereof with a release layer, said release layer comprising a layered silicate and having said material layer deposited thereon by a deposition process so as to form a thin film of 0.005 to 50 microns, said deposited material layer being releasable to obtain said material, wherein the release layer comprises a layered silicate plus binder and wherein the binder comprises melamine fomaldehyde and/or a derivative thereof.
A release film having a layer of material comprising a metal or metal-containing compound deposited thereon, said release film comprising a substrate coated on at least one surface thereof with a release layer, said release layer comprising a layered silicate and having said material layer deposited thereon by a deposition process so as to form a thin film of 0.005 to 50 microns, said deposited material layer being releasable to obtain said material wherein a layer of adhesive is deposited on the layer of deposited material, and a removable liner is disposed in contact with the layer of adhesive.
A method of making a release film having a layer of material comprising a metal or metal-containing compound deposited thereon, said release film comprising a substrate coated on at least one surface thereof with a release layer, said release layer comprising a layered silicate and having said material layer deposited thereon by a deposition process so as to form a thin film of 0.005 to 50 microns, said deposited material layer being releasable to obtain said material, said method comprising the steps of;
- coating a substrate on at least one surface thereof with an aqueous solution of layered silicate,
- heating the coated substrate at a temperature sufficient for drying the layered silicate to the film,
- depositing a layer of material comprising a metal or metal-containing compound onto the coated film by a deposition process so as to form a thin film of 0.005 to 50 microns, said deposited material layer being releasable to obtain said material, and
- releasing the layer of material from the coated film, wherein the layer of material is released in aqueous conditions.
Dependencies are inferred from the claim text.