Asahi Kasei Kogyo Kabushiki Kaisha

Susumu Isohata

Kyoichi Sasaki

Toshiyuki Iwaisako

Norio Iriguchi

Momoki Sumi

Goro Kanda

Yoshihiro Minamitani

Kazutaka Watabe

Morio Shimoshimizu

A magnesia cement composition comprising active magnesia, magnesium sulfate, and pulp or a mixture of pulp and fibrous glass. When hardened, this composition yields a crack-free low-shrinkage material. Valuable composite boards are obtained by lamination from the hardened composition and core materials such as cellular concrete, plywood, plastic foam, gypsum plaster board, and cemented excelsior board.

Magnesia cement composition, process of its manufacture, and composite

An inorganic hardening composition containing water glass and at least one of petalite and spodumene fired at a temperature of at least 1,000.degree.C has a high hardness, water resistance, incombustibility and fire resistance.

Inorganic hardening composition

A microwave oven comprises a heating element which produces heat by absorption of microwave radiation and on which is placed a material to be cooked with the interposition of a material support therebetween. If required, the heating element is disposed on a heat insulating body. A shield cover is arranged on the support for enclosing the material to be cooked placed on the support and for limiting the amount of microwave radiation which is allowed to be incident on the material from the exterior thereof. The material to be cooked is internally heated upon irradiation with the radiation and at the same time the heating element produces heat which is applied to the surface of the material through the material support. When the material support comprises a metal plate, an electric insulating body which prevents a spark discharge is arranged between the shield cover and the metal plate.

Microwave cooking apparatus

Growing community of inventors

Fuji, Japan

Susumu Isohata