Sumitomo Chemical Company, Limited

Tdk Corporation

Fumakilla Limited

Shinobu Yamamoto

Yasuharu Takei

Satoshi Ohi

Kunihiro Okada

Shiro Oyama

Michikazu Takeuchi

Ryo Yamamoto

Sumihiro Yasuda

Yoshihiro Hirobe

Fumitoshi Hoshide

Shou Kotani

A heat fumigation apparatus for transpiring a solution of a chemical agent dissolved in a solvent by heating which comprises a container having the solution therein, a wick a part of which is immersed in the solution and a heater for heating the upper portion of the wick thereby transpiring the solution drawn up the wick. The wick is composed of an inorganic powder and/or an organic powder, a binding agent and at least one antioxidant which is substantially non-evaporative at a heating temperature.

Heat fumigation apparatus

An insecticidal composition for electric fumigator consisting essentially of:

Insecticidal article for electric fumigator

A PTC heating device is adapted to be used as a heat source for an electric vaporizer which is adapted to heat liquid medicine, e.g., liquid insecticide, aromatic liquid, or the like, to vaporize it. The PTC heating device includes a casing in which an electrode structure including at least one PTC thermistor having electrodes arranged on both surfaces thereof and two electrode members interposing the PTC thermistor therebetween is received. The PTC heating device further includes a heat-radiating member mounted through a heat-conducting member with respect to the casing and for heating an absorber having sucked up liquid medicine from a reservoir having the liquid medicine contained therein to vaporize the liquid medicine. One of the electrodes of the PTC thermistor is in close contact with a flat surface of the heat-conducting member through one of two electrode members, so that heat generated at the PTC thermistor is efficiently transmitted to the heat-radiating member through the heat-conducting member.

PTC heating device

In a method for knock down of injurious insects or for freeing a particular environment therefrom by heating fumigation comprising dipping a part of a porous absorptive wick in an insecticidal solution to allow it to absorb the solution and indirectly heating said wick around the top to fumigate the absorbed insecticidal solution, a method for knock down of injurious insects or for freeing a particular environment therefrom, which comprises exposing the insects to the vapor, characterized in that a C.sub.12 -C.sub.18 aliphatic saturated hydrocarbon solution containing as an active ingredient 2-methyl-4-oxo-3-(2-propynyl)cyclopent-2-enyl chrysanthemate is used as said insecticidal solution, a porous absorptive wick prepared by caking a powdery inorganic substance with a binding agent is used as said porous absorptive wick, and besides that said absorptive wick is indirectly heated around the top to a temperature in a range of from 105.degree. to 130.degree. C.

Method for killing insects by heating fumigation

Growing community of inventors

Hiroshima, Japan

Shinobu Yamamoto