Anti-tack adhesive surface for thermal print elements

Details Anti-tack adhesive surface for thermal print elements Anti-tack adhesive surface for thermal print elements

B - Operations, Transporting

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B41M 5/34 (2006.01) B32B 27/08 (2006.01) B41M 5/36 (2006.01) B41M 7/00 (2006.01)

Patent

CA 1296894

- o - ANTI-TACK ADHESIVE SURFACE FOR THERMAL PRINT ELEMENTS Abstract of the Disclosure A thermal print element comprising a support having thereon a layer containing a thermally- transferred dye image, the element having at least one layer of adhesive thereon having an anti-tack surface, the anti-tack surface comprising at least about 0.2 g/m2 of particulate material, such as fumed silica, silica, alumina or polystyrene matte beads, having a particle size up to about 20 µm. In a preferred embodiment, the adhesive layer comprises a linear, random copolyester of one or more aromatic dibasic acids and one or more aliphatic diols, modified with up to 30 mole % of one or more aliphatic dibasic acids, having a melt viscosity of between about 1,000 and about 20,000 poise at 150°C. The adhesive is used to laminate a cover sheet to one or both surfaces of the thermal print element. The anti-tack surface prevents the adhesive on the cover sheet from sticking to another cover sheet having an adhesive layer thereon, prior to having a thermal transfer print inserted therebetween to form the laminate.

570962

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