Nippon Paper Industries Co., Ltd.

Kunio Takebayashi

Takashi Ochi

Kaoru Hamada

Yoshimi Midorikawa

Tadakazu Fukuchi

Yoshihide Kimura

Koichi Yanai

Akinobu Chatani

Reiko Sato

Yuji Ozawa

Dai Nagahara

Hidenori Ogawa

A method for manufacturing an inkjet recording medium comprising the steps of: applying a coating color containing a pigment and a binder as major components to at least one side of a base material using a transfer roll coater, subsequently drying coating layer to form an ink absorbing layer, wherein Hercules viscosity of coating color is 5 m Pa&#xb7;s to 30 m Pa&#xb7;s and pigment contains a synthetic silica having an oil absorption of 90 ml/10 g to 200 ml/100 g, a BET specific surface area of 45 m/g to 200 m/g and an average particle diameter of 1.0 &#x3bc;m to 3.0 &#x3bc;m and/or a precipitated calcium carbonate-silica composite having an oil absorption of 100 ml/10 g to 250 ml/100 g, a BET specific surface area of 5 m/g to 150 m/g and an average particle diameter of 1.0 &#x3bc;m to 10 &#x3bc;m.

Process for producing inkjet recording medium

A thermally sensitive recording paper having a recording surface which when a postage stamp or a revenue stamp is adhered to the recording surface requires at least ten cycles of a removal test procedure to remove at least one third of the adhered surface of the stamp from the recording surface of the thermally sensitive recording paper, wherein the removal test procedure comprises adhering the postage stamp or revenue stamp to the recording surface of the thermally sensitive recording paper, hanging the recording paper over an iron bar of about 8 mm diameter with the postage stamp or revenue stamp on an outer surface of the recording paper, adjusting the recording paper such that equal lengths are on either side of the iron bar, attaching to one end of the thermally sensitive recording paper a weight of about 500 g, holding the other end of the thermally sensitive recording paper by hand and carrying out a pull down ant put back cycle motion of the hand to move the postage stamp or revenue stamp over the iron bar until at least a portion of the postage stamp or revenue stamp is removed from the surface of the recording paper.

Thermally sensitive recording medium

Growing community of inventors

Tokyo, Japan

Kunio Takebayashi