Kao Corporation

Fuji Photo Film Company, Limited

Hitoshi Otsuka

Shingo Odajima

Nobuyuki Isshiki

Minoru Goto

Hidetoshi Oga

Akira Kawamata

A biodegradable wax composition containing a wax as a main component and also containing a biodegradable polymer and a filler and having a moisture permeability of 3 g&#xb7;mm/m&#xb7;24 hr or less at 40&#xb0; C. and 90% RH. The wax is preferably present in an amount of 65 to 95% by weight. The biodegradable polymer preferably has a weight average molecular weight of 200,000 or higher. The polymer is preferably polyisoprene or natural rubber and is preferably present in an amount of 5 to 35% by weight.

Biodegradable wax composition

A process of producing a wax composition mainly comprising a wax, including the step of mixing the wax and a component to be mixed with the wax by applying an external force at a temperature lower than the melting completion temperature of the wax.

Wax composition and method for production thereof

A method for producing a magnetic recording medium having a magnetic material coated on a surface of a polymeric film comprising, in the running direction of the polymeric film, the steps of pressing a cleaning tape made of one of a non-woven fabric and a fabric impregnated with a cleaning agent against the surface of said polymeric film onto which said coating material is coated in order to wipe off foreign matter adhering to said surface of the polymeric film; drying the surface of the wiped polymeric film; and just after the drying step, coating a magnetic coating material onto a surface of a polymeric film while said polymeric film is running. An apparatus for the above method is also disclosed.

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Tochigi, Japan

Hitoshi Otsuka