Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Ukima Colour & Chemicals Mfg. Co., Ltd.

Other

Katsutoshi Torii

Kazuyuki Hanada

Takeshi Kawaguchi

Motoaki Umezu

Katsuyuki Fukui

Kenichi Takahashi

Masashi Saito

Katsumi Kuriyama

Iwao Misaizu

Kazuya Kimura

Tomoaki Kamita

A thermal ink ribbon has a base sheet, a thermal recording layer arranged on one side of the base sheet, and a back layer arranged on an opposite side of the base sheet. The back layer according to the present invention comprises a polyurethane resin which is obtained by reacting a low molecular weight polymer having at least one active-hydrogen-containing group at one end of the molecule, a compound having at least one active-hydrogen group and at least one hydrophilic group except a hydroxide group, with a polyisocyanate. The back layer is excellent in the adhesiveness to a base sheet, the heat resistance relative to a thermal head and slipperiness to a thermal head; and the ink ribbon with such a back layer has no problems in printed characters and figures on printing, in the migration of impurities from the back layer into an ink layer, in smeariness of a thermal head and in its maintenance. Such a back layer is capable of being formed on a surface of a base sheet by only applying the coating, which comprises the above polyurethane resin, for forming a back layer; and drying the coated layer.

Thermal recording media

An ink-jet recording sheet is provided with at least one ink-receiving layer on at least one side of a base material sheet. A resin component which constitutes the ink-receiving layer comprises a hydrophilic resin containing tertiary amino groups in a molecule thereof or a hydrophilic resin containing tertiary amino groups and polysiloxane segments in a molecule thereof. A coating formulation suitable in use for the production of the ink-jet recording sheet is also disclosed.

Ink-jet recording sheet and coating formulation for the production of the sheet

An ink-jet recording sheet is provided with at least one ink-receiving layer on at least one side of a base material sheet. A resin component which constitutes the ink-receiving layer comprises a hydrophilic polyurethane resin, hydrophilic polyurea resin, hydrophilic polyurethane-polyurea resin or hydrophilic polyamide resin having siloxane segments in a molecule thereof. As an alternative, the ink-receiving layer comprises a porous hydrophilic polyurethane resin, a porous hydrophilic polyurea resin or a porous hydrophilic polyurethane-polyurea resin.

Ink-jet recording sheet

Ink-jet recording sheet comprising a molecule containing tertiary amino

An ink-jet recording sheet is provided with at least one ink-receiving layer on at least one side of a base material sheet. A resin component which constitutes the ink-receiving layer comprises a hydrophilic resin containing hydrolyzable silyl groups in a molecule thereof, a hydrophilic resin containing hydrolyzable silyl groups and tertiary amino groups in a molecule thereof, or a hydrophilic resin containing hydrolyzable silyl groups, tertiary amino groups and polysiloxane segments in a molecule thereof. A coating formulation suitable in use for the production of the ink-jet recording sheet is also disclosed.

Ink-jet recording sheet and coating formulation for the production of

A release agent comprising a resin containing siloxane segments is described. The resin has been modified with a silane coupling agent containing at least one free isocyanate group and contains one or more hydrolyzable silyl groups in side chains of its molecule.

Release agents

A heat-sensitive recording material comprises a base sheet material, a heat-sensitive recording layer provided on one side of the base sheet material and a heat-resistant layer provided on the other side of the base sheet material. The heat-resistant layer is formed of a resin which is modified with a silane coupling agent, which contains at least one free isocyanate group, and containing one or more hydrolyzable silyl groups in side chains of its molecule.

Growing community of inventors

Tokyo, Japan

Katsutoshi Torii