Mitsubishi Rayon Company, Limited

Daisuke Morimoto

Hirotoshi Mizota

Tomonari Murakami

Hitoshi Tomobe

Hajime Okutsu

To be provided are a heat treatment apparatus having blocking members which block gaps between the side walls of nozzle boxes provided with slit nozzles, whose size in the lengthwise direction is greater than the width of a sheet, and the side walls of a heat treatment chamber, and gas having a uniform velocity fluctuating no more than &#xb1;25% in the lengthwise direction of the slit nozzles is blown out of the slit nozzles to subject the sheet to heat treatment, resulting in little unevenness of temperature in the widthwise direction and reduced energy loss, and a heat treatment method using this heat treatment apparatus.

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Toyama, Japan

Daisuke Morimoto