Thk Co., Ltd.

Toyo Ink Sc Holdings Co., Ltd.

Toyo Ink Co., Ltd.

Junya Suenaga

Tetsuhiro Nishide

Haruki Shoji

Mitsuhito Takamura

Tsutomu Tokairin

Akeha Fukushima

Nishide Tetsuhiro

A rosin-modified resin having a structural unit (ab) derived from a compound obtained by addition of an &#x3b1;,&#x3b2;-unsaturated carboxylic acid or acid anhydride thereof (B) to a conjugated rosin acid (A), a structural unit (c) derived from an organic monobasic acid (C) excluding the conjugated rosin acid (A), a structural unit (d) derived from an aliphatic polybasic acid anhydride (D), and a structural unit (e) derived from a polyol (E), wherein the weight ratio between the structural unit (ab) and the structural unit (c) is within a range from 100:80 to 100:350.

Rosin-modified resin and method for producing same, varnish for active energy ray-curable lithographic ink, active energy ray-curable lithographic ink, and printed product

A ball joint is manufactured by molding a holder through casting by using a ball as a core and joining a shaft member to the ball after the casting through electric resistance welding. The ball joint includes: the ball; a resin sliding contact member including a first opening portion and a second opening portion that expose a spherical surface of the ball in opposite directions; the holder molded through the casting by using the ball and the resin sliding contact member as a core, the holder being obtained by integrally molding a closing portion that is held in contact with a part of the ball, which projects from the second opening portion of the resin sliding contact member; and the shaft member joined to another part of the ball, which is exposed from the first opening portion of the resin sliding contact member, through the electric resistance welding.

Ball joint and manufacturing method therefor

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Tokyo, Japan

Junya Suenaga