Nippon Paper Industries Co., Ltd.

Masanori Tanaka

Shunji Sekiguchi

Isamu Ono

Takao Yoshimoto

Yuu Kitamura

It is an object of the present invention to provide a chlorinated polyolefin resin having favorable adhesion to a polyolefin resin and high solubility in a composition containing an alcohol-based solvent. The present invention provides a chlorinated polyolefin resin that exhibits, in infrared spectroscopy spectrum measurement, a peak area ratio A/B&#xd7;100 of 10% or higher, a peak area ratio C/B&#xd7;100 of 30 to 80%, and a peak area ratio A/C&#xd7;100 of 30% or higher (wherein 'A' is the area of a peak resulting from hydroxyl groups, 'B' is the area of a peak resulting from methylene groups, and &#x201c;C&#x201d; is the area of a peak resulting from carbonyl groups). The present invention also provides an ink composition for gravure printing or flexography that contains the chlorinated polyolefin resin, a printed material obtained using the above composition, and a printing method using the above composition.

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Yamaguchi, Japan

Masanori Tanaka