UV curable adhesive for stencil media
AssigneeNCR Corporation
InventorsMichael A. Lorenz, Joseph D. Roth
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Abstract
A thermal stencil master sheet for stencil printing has a porous substrate for absorbing ink and a thermoplastic resin film bound thereto by an adhesive. The stencil pattern is formed in both the film and adhesive. The adhesive comprises a thermoplastic resin derived from UV and visible light cured monomers, oligomers and mixtures thereof. In the method provided, thermal stencil master sheets are prepared by forming a liquid layer of adhesive between the porous substrate and the thermoplastic resin film and curing the liquid layer by exposure to UV or visible light.
Claims13
A thermal stencil master sheet which comprises:
- a) a porous substrate,
- b) a polyethylene terephthalate film, and
- c) an adhesive which comprises a thermoplastic resin derived from:
- i) monofunctional monomers selected from the group consisting of cycloaliphatic monoepoxies, epoxidized alphaolefins, limonene monoxide and epoxidized polybutadiene;
- ii) bifunctional monomers and oligomers selected from the group consisting of bis(3,4-epoxycyclohexyl)adipate, limonene dioxide, bisphenyl epoxy and 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate;
- and
- iii) polyfunctional monomers and oligomers selected from the group consisting of epoxidized soy bean oil and linseed fatty acid esters, wherein at least 25 wt. % of the adhesive comprises said thermoplastic resin formed from said monofunctional monomer, bifunctional monomers, bifunctional oligomers, poly functional monomers and poly functional oligomers.
Dependencies are inferred from the claim text.