Preparation method of eco-friendly long-lasting heat-sensitive paper

Abstract

The present application discloses an eco-friendly long-lasting heat-sensitive paper, including a substrate layer, a base color layer, a heat-sensitive covering layer, and a protective layer that are arranged sequentially from bottom to top, where the heat-sensitive covering layer is prepared as follows: coating a heat-sensitive covering layer raw material on the base color layer, and oven-drying a resulting product, where the heat-sensitive covering layer raw material is an emulsion obtained by mixing an acrylic hollow microsphere with a host resin. In the present application, an acrylic hollow microsphere that can change from an opaque state to a transparent state after rupturing under heat is used as a heat-sensitive covering layer to cover a base color layer to obtain the heat-sensitive paper with heat-sensitive color development characteristics.

Dependencies are inferred from the claim text.