Nippon Paper Industries Co., Ltd.

Nobuhiro Hatoh

Morio Matsuzaki

Hisashi Mino

A heat-sensitive adhesive sheet for bonding a pair of information-recorded faces, belonging to the same sheet or two different sheets of recording material, together by application of heat thereto, which comprises three or more layers, including a support and a synthetic resin layer coated on either side of the support, having a peeling resistance ranging from 10 to 150 g/50 mm between the support and each synthetic resin layer in the T-peel test performed at a peeling speed of 300 mm/min. in the atmosphere of 20.degree. C. and 65% RH, and a peeling resistance greater than 300 g/50 mm, measured under the same conditions as described above, between each synthetic resin layer and the information-recorded face when heated in a condition wherein the adhesive sheet is sandwiched in between a pair of information-recorded faces of the recording material, and an information-recorded material, preferably of postcard size, made by inserting the foregoing heat-sensitive adhesive sheet between each pair of information-recorded faces belonging to one sheet or two or more sheets of recording material, wherein at least two information-recorded faces are present, and then by heating them at a temperature of 100.degree. C. or lower to unit them together through heat-sensitive adhesion.

Growing community of inventors

Higashimatuyama, Japan

Nobuhiro Hatoh