1950-

Cellulose acetate
Cellulose acetate
In 1950, our acetate business entered full-scale production. An acetate fiber manufacturing facility was constructed in our Sakai Plant, a cellulose acetate manufacturing facility was constructed in our Aboshi Plant, and a post-carbide organic chemical manufacturing facility was constructed in our Arai Plant.

Cellulose acetate manufactured by the Aboshi Plant was supplied to the Sakai Plant for the production of fibers and to the Aboshi Plant for production of acetate plastic. For reasons of safety, cellulose acetate was used as the photographic film base in place of cellulose nitrate. In addition, because the properties of diacetate were not satisfactory, Fuji Photo Film Co., Ltd. (currently FUJIFILM Corporation) requested that we replace diacetate with triacetate because of the superior properties of the latter. As a result, we started supplying triacetate in 1953 and completed development of noncombustible films in 1958. That same year, the Sakai Plant started production of acetate tow for cigarette filters.

In 1953, we entered the gunpowder business. In 1954, we constructed the Kawachi Sub-Plant (currently the Harima Plant) as a separate plant of the Aboshi Chemical Plant and started production of smokeless gunpowder.

At that time, when the Japanese economy entered a period of rapid growth, synthetic high-polymer-based plastics made their debut. As a result, demand for celluloid declined.

In 1956, to expand our plastics business, we established Dainippon Plastics Co., Ltd. and started processing plastics and developing applications.
Significant events of that era
1951: The San Francisco Peace Treaty is signed.
From September 4 to 8, representatives of 52 countries attended the peace meeting with Japan held in San Francisco, U.S.A., so that Japan could return to the international community as an independent country.
On September 8, a total of 49 countries, excluding the Soviet Union, Czechoslovakia, and Poland, signed the San Francisco Peace Treaty. Japan abandoned the Kurile Islands (excluding four islands) and Sakhalin.
1953: TV broadcasting begins in Japan.
On February 1, the NHK Tokyo TV station started TV broadcasting in Japan for the first time. In August, Nippon Television Network, the first commercial broadcasting TV station, also started broadcasting and installed TV sets at 53 points along the streets of Tokyo and other areas to popularize television. The first year of TV broadcasting became known as "the first year of electrification." After that, TV sets spread throughout Japan. When these TV stations began operation, the number of TV sets in Japan numbered only 1,000, but this number rose to more than 2 million by 1959.