Radiation sensitive films having high radiation sensitivities
AssigneeISP Investments Inc.
InventorsDavid K. HOOD, Carlos E. CAICEDO-CARVAJAL
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Abstract
The invention provides radiation sensitive films, radiation dosage indicators comprising these films, processes for preparing these films, and methods of use of these films in several industrial and domestic applications that require exposure to radiation for certain benefits. The radiation sensitive films comprise a radiation sensitive composition typically in the form of a film which is overlaid by an uncolored and optically transparent layer for increasing the radiation sensitivity of the films.
Claims27
A radiation sensitive film comprising:
- (a) at least one first layer comprising a radiation sensitive composition capable of changing opacity in response to exposure to a radiation dosage exceeding a predetermined threshold;
- (b) on top or bottom of said first layer, at least one uncolored and optically transparent second layer;
- and
- (c) optionally, a protective layer on top of said second layer.
A process for preparing a radiation sensitive film comprising:
- (a) selecting at least one first layer in the form of a film of a radiation sensitive composition capable of changing opacity in response to exposure to a radiation dosage exceeding a predetermined threshold;
- (b) coating on top or bottom of said first layer, at least one uncolored and optically transparent second layer;
- and (c) optionally providing a protective layer on top of said second layer.
A process for preparing a radiation sensitive film comprising:
- (a) selecting at least one first layer in the form of a film of a radiation sensitive composition capable of changing opacity in response to exposure to a radiation dosage exceeding a predetermined threshold;
- (b) printing on top or bottom of said first layer, at least one uncolored and optically transparent second layer;
- and (c) optionally providing a protective layer on top of said second layer.
A process for preparing a radiation sensitive film comprising:
- (a) selecting at least one first layer in the form of a film of a radiation sensitive composition capable of changing opacity in response to exposure to a radiation dosage exceeding a predetermined threshold;
- (b) laminating on top or bottom of said first layer, at least one uncolored and optically transparent second layer;
- and (c) optionally providing a protective layer on top of said second layer.
A multilayer radiation dosage indicator comprising:
- (a) a base substrate comprising a visible mark;
- (b) on top of said base substrate, at least one first layer comprising a radiation sensitive composition capable of changing opacity in response to exposure to a radiation dosage exceeding a predetermined threshold;
- (c) on top or bottom of said first layer, at least one uncolored and optically transparent second layer comprising a viewing zone through which said visible mark on said base substrate is viewable depending on opacity of said first layer prior to exposure to said radiation;
- and
- (d) optionally, a protective layer on top of said second layer.
Dependencies are inferred from the claim text.