Thermoresponsive paper coatings based on cellulose derivatives
AssigneesPapierfabrik August Koehler SE, Technische Universität Darmstadt
InventorsMaximilian Nau, Markus Biesalski, Michael Horn
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Abstract
The present invention relates to a heat-sensitive recording material comprising a carrier substrate, which is black or coloured on at least one side, and a thermoresponsive layer on the at least one black or coloured side of the carrier substrate, wherein the thermoresponsive layer comprises nanoparticles of at least one cellulose ester, and to a method for producing this material, and to a heat-sensitive recording material that can be obtained by this method.
Claims15
Heat-sensitive recording material comprising a carrier substrate which is black or coloured on at least one side, and a thermoresponsive layer on the at least one black or coloured side of the carrier substrate, wherein the thermoresponsive layer comprises nanoparticles of at least one cellulose ester comprising cellulose acetate butyrate, and wherein the nanoparticles have a number-average particle size of 50 to 400 nm, measured by means of dynamic light scattering (DLS).
Method for producing a heat-sensitive recording material comprising applying an aqueous suspension having a solids content of 15 to 65% by weight and containing nanoparticles of at least one cellulose ester comprising cellulose acetate butyrate to a black or coloured side of a support substrate, the aqueous suspension being applied and dried according to coating methods which produce a contour coating or a levelling coating, and wherein the nanoparticles have a number-average particle size of 50 to 400 nm, measured by means of dynamic light scattering (DLS).
Dependencies are inferred from the claim text.