Kanzaki Specialty Papers, Inc.

Hidenori Yada

Simon Roberto Cuch

Mayurkumar Patel

Shigetoshi Seki

A multi-layer sheet material imageable by both direct thermal printing devices and digital offset printing presses (e.g., Hewlett-Packard (HP) Indigo digital offset printing presses), is provided. In one contemplated embodiment, the inventive sheet material demonstrates good ink/media adhesion when imaged using HP Indigo presses, and is comparable or superior to standard direct thermal grades in terms of printability and durability. Where HP Indigo and direct thermal are on demand printing devices, the present invention makes it possible to have a production line where both are in operation at various process steps.

Multi-layer sheet material

A heat-sensitive recording material comprises a support, a heat-sensitive recording layer including a leuco dye and a developer, and a protective layer comprising a pigment and a binder. The heat-sensitive recording layer is located between the support and the protective layer. The pigment in the protective layer comprises secondary particles with an average particle diameter of about 30 to 900 nm formed preferably by aggregation of amorphous silica primary particles with a particle diameter of about 3 to 70 nm. The secondary particles are present in a proportion of about 5 to 35 mass % relative to total solids of the protective layer. The colloidal silica is present in a proportion of about 1 to 25 mass % relative to total solids of the protective layer.

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Tokyo, Japan

Hidenori Yada