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AssigneeMitsubishi Paper Mills Limited
InventorsYasuro Yokota, Masato Shiraishi
Estimating the term…
Concerning a process for producing an information recording material having an information recording layer formed on a substrate, there are disclosed (1) a method of curtain-coating a coating composition film comprising two coating solution films of which the viscosity increases when the two coating solution films are brought into contact, or mixed, with each other and an intermediate coating solution film that is for isolating said two coating solution films one from the other and is provided between said two coating solution films, (2) a method of curtain-coating a coating composition film comprising at least one set of adjacent two layers of which the viscosity increases with the passage of time when the two layers are brought into contact, or mixed, with each other, (3) a method of applying water or an aqueous solution to a substrate surface and curtain-coating the substrate in a non-dry state with a coating composition film made of a plurality of layers, and (4) a method of curtain-coating a coating composition film having, as a lowermost layer, a coating solution having a water content of at least 90 % by weight. According to the method of the present invention, there can be produced an information recording material particularly excellent in quality of applied layers and excellent in various properties with good productivity.
A process for producing an information recording material comprising a substrate and an information recording layer formed thereon, which comprises curtain-coating a coating composition film made of a plurality of layers on the substrate to form the information recording layer,
A process for producing an information recording material comprising a substrate and an information recording layer formed thereon, which comprises curtain-coating a coating composition film made of a plurality of layers to form part or the entirety of a plurality of layers constituting the information recording material,
A process for producing an information recording material comprising a substrate and an information recording layer formed thereon, which comprises curtain-coating a coating composition film made of a plurality of layers to form part or the entirety of a plurality of layers constituting the information recording material,
A process for producing an information recording material comprising an information recording layer formed on a substrate, which comprises curtain-coating a coating composition film made of a plurality of layers to form part or the entirety of a plurality of layers constituting the information recording material,
Dependencies are inferred from the claim text.
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Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording:…
Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used: using chemical…
Characterised by structural details, e.g. multilayer materials: intermediate layers
Photosensitive materials: applying photosensitive compositions to the base; Drying processes therefor
Term end not estimated
The present invention relates to a process for producing an information recording material and a coating solution for use therein. More specifically, the present invention relates to a process for well productively producing an information recording material such as a thermal recording material or an inkjet recording material excellent particularly in the quality of coating layers and excellent in various properties, and a coating solution for use in this process.
Information recording materials having an information-recording layer formed on a substrate are used in broad fields. A variety of recording materials such as a pressure-sensitive recording material, a heat-sensitive recording material, a photo-sensitive heat-sensitive recording material, a photo-sensitive pressure-sensitive recording material, a thermal transfer recording material, an inkjet recording material, etc., are practically used as such information recording materials. In recent years, information recording materials having two or more layers formed on a substrate are also used to comply with demands for higher functions and higher performances.
A thermal recording material is generally a material in which a heat-sensitive recording layer containing a thermally color-formable material is formed on a substrate. The thermal recording material is heated with a thermal head (hot head), a thermal pen, laser light, or the like, to form an image.
(A-1) Preparation of Heat-Sensitive Recording Layer Coating Solution
Mixtures having the following compositions were dispersed with a ball mill to give liquids A-1-1, A-1-2 and A-1-3 having a volume average particle diameter of 1 μm and a liquid A-1-4 having a volume average particle diameter of 2 μm. 1 Liquid A-1-1: 3-Dibutylamino-6-methyl-7-anilinofluorane 40 parts 10% Polyvinyl alcohol aqueous solution 20 parts Water 40 parts
2 Liquid A-1-2: 4,4′-Bis(hydroxyphenyl)sulfone 80 parts 10% Polyvinyl alcohol aqueous solution 40 parts Water 80 parts