Kabushiki Kaisha Toshiba

Other

Mitsui Toatsu Chemicals, Incorporated

Yoshiro Nakamura

Kunio Mori

Yoshio Mochida

Minoru Okumura

Matsuo Miyazaki

Yoichi Kawai

Katsumi Sekiguchi

Yoshihisa Gotoh

Sachio Yokote

Masami Maki

Jitsuo Ikeya

Hirotoshi Fukuoka

A bent finned tube heat exchanger to transfer heat between a fluid passing through the tubes and a fluid passing around the heat exchanger, and a plate fin therefor. The plate fin has a zigzag shape defining a plurality of sharp parts and pointing alternately in opposite directions, a plurality of weakened portions, each provided between adjacent sharp parts and holes in the sharp parts aligned in two lines in the longitudinal direction of the plate fin. The heat exchanger is constructed with a plurality of the plate fins and tubes passing through the holes of the plate fins. The sharp parts are separated from each other, along the weakened portions, during bending so that the lengths of the tubes in the two lines is equalized when the heat exchanger is bent.

Heat exchanger and plate fin therefor

A heat transfer promoter composition comprises a triazine-dithiol derivative represented by the general formula ##STR1## wherein R represents --NHR' or --NR'.sub.2 wherein: R' is a hydrocarbon group; M is selected from the group consisting of hydrogen, alkali metals, and alkaline earth metals; and at least one of M groups is alkaline metal or alkaline earth metal. This heat transfer promotor is applied to that surface of a condenser tube to be contacted by a vapor to be condensed.

Heat transfer promoters and method of using the same

An electroconductive polyolefin composition comprising (a) 100 parts by weight of a polyolefin resin, (b) 10 to 60 parts by weight of carbon black, (c) 0.1 to 6 parts by weight of sulfur and (d) 0.1 to 5 parts by weight of trithiolcyanuric acid, and optionally containing 5 to 60 parts by weight of atactic polypropylene.

Electroconductive resin composition

Growing community of inventors

Morioka, Japan

Yoshiro Nakamura