Nippon Paper Industries Co., Ltd.

Jun Makihara

Akihito Ogino

Hirokazu Morii

Hideaki Nisogi

Makoto Hasegawa

Takashi Ochi

Hideki Fujiwara

Kenji Hirai

Junpei Natsui

Seiki Yoneshige

Naoki Negishi

Takehide Kasahara

Ken Takagi

Yukiko Ohira

Shin Suzuki

Takeshi Hirose

The present invention presents a thermosensitive recording medium having excellent color development, image quality and preservation properties as well as excellent stamp receptivity, anti-scratching ability, printability and water blocking resistance. The present invention is a thermosensitive recording medium having a thermosensitive recording layer comprising at least a colorless or pale colored basic leuco dye and an electron accepting developing agent as a coating layer on a substrate, wherein at least an outermost layer among the thermosensitive recording layer and other optionally prepared coated layers contains rice starch particles.

Thermosensitive recording medium

The present invention provides a thermosensitive recording medium, which is excellent in stamping ability, anti-scratching ability, and water and plasticizer resistance of image area as well as in recording sensitivity, image quality and storage stability. The present invention is a thermosensitive recording medium having a thermosensitive recording layer containing at least a colorless or pale colored basic leuco dye and an electron accepting developing agent as a coating layer on a substrate, wherein at least an outermost layer among the thermosensitive recording layer and other optionally prepared coated layers contains powdered cellulose, wherein the powdered cellulose is prepared by a dry grinding process at ambient temperature. The thermosensitive recording medium preferably contains a condensate composition comprising 2,2'-methylenebis(4-t-butylphenol) as an electron accepting developing agent, and a cross-linked diphenylsulfone compound such as 2,2&#x2032;-bis[4-(4-hydroxyphenylsulfone) phenoxy]diphenylether as a stabilizer.

A thermally-sensitive recording medium having a protecting layer formed on a thermally-sensitive recording layer containing a colorless or pale-colored electron-donating leuco dye and electron-accepting color-developing agent. The thermally-sensitive recording layer is formed on a substrate, and the protecting layer contains a resin that contains a carboxyl group, epichlorohydrin resin and modified polyamine/amide resin, and the thermally-sensitive recording medium exhibits sufficient resistant against water such as rain or humidity, and further is excellent in printing run-ability (head debris and sticking) and sensitivity.

Thermally-sensitive recording medium

A dull coated printing paper that is bulky (low in density) having a density of 0.90 to 1.15 g/cmand yet offers excellent pliability, superior surface smoothness, high degree of print gloss and minimal small-scale gloss variations in the image area are obtained by forming a coating layer comprising a pigment and an adhesive on a base paper which contains an organic compound having an action to inhibit binding between pulp fibers and then carrying out calender treatment at a line pressure for the treatment of 50 to 150 kg/cm.

Dullish coated paper for printing

A coated printing paper the product of whose basis weight, density, Young's modulus in the machine direction and breaking length in the machine direction is within the range of no less than 1.0&#xd7;10g&#xb7;N/mbut not greater than 4.0&#xd7;10g&#xb7;N/m, and which offers excellent pliability, superior print gloss in the image area regardless of lower white-paper gloss, minimal small-scale gloss variations in the image area, and excellent workability with the printing machinery, more particularly a matte coated paper, is provided.

Printing coated paper

Growing community of inventors

Tokyo, Japan

Jun Makihara