Novel microfilm and process for preparation
AssigneeXerox Corporation
InventorsJoseph Yung-Chang Chu, Richard Louis Schank
Life of this patent
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Abstract
Microfilm structures of improved contrast are provided by coating a suitable transparent film substrate with an intermediate layer of a silicone elastomer which is abhesive to ink, coating said silicone with a surface layer of a photosensitive polymer which when exposed to activating electromagnetic radiation cross-links and chemically attaches to said silicone elastomer to form oleophilic ink accepting image areas, imagewise exposing said photosensitive polymer, removing the non-exposed, light sensitive polymer to form non-imaged areas of the abhesive silicone elastomer, and selectively inking the oleophilic image areas to form an imaged microfilm structure of improved image density and contrast.
Claims10
A novel microfilm comprising a transparent film substrate, an intermediate silicone elastomer which is abhesive to ink and a surface layer of a photosensitive polymer which upon exposure to activating electromagnetic radiation crosslinks and chemically attaches to the silicone elastomer to form ink accepting image areas.
A process for providing a microfilm structure comprising:
- a. providing a suitable transparent film substrate,
- b. coating said substrate with an intermediate layer of a silicone elastomer gum curable or coalesceable to an ink releasing abhesive condition,
- c. rendering said silicone inherently abhesive to ink,
- d. coating said silicone with a surface layer of a photosensitive polymer which then exposed to actinic radiation crosslinks and combines with said silicone elastomer to form oleophilic ink accepting image areas,
- e. imagewise exposing said photosensitive polymer to cause the polymer to become insoluble and combine with the silicone to form an image area
- f. removing the non-exposed, light sensitive polymer to form non-imaged areas of the abhesive silicone elastomer, and
- g. selectively inking the oleophilic image areas to form an imaged microfilm structure of improved image density and contrast.
An imaged microfilm comprising a transparent film substrate, an intermediate silicone elastomer which is adhesive to ink and an image formed of a olephilic photosensitive polymer which is attached to the silicone and which has a surface layer of an oleophilic ink.
Dependencies are inferred from the claim text.