US 5,389,322 A · Method for manufacture of biodegradable disposable container

Abstract

A method for manufacture of a biodegradable disposable container, which container is biodegradable and reduces generation amount of the refuse, and prevents environmental pollution. The method comprises the steps of i) mixing 40-46 weight % of fine granular sawdust powder with 29-35 weight % of albumen and agitating, ii) mixing the result mixture with 17-23% of a potato starch and 4-6% of sodium metaphosphate and agitating, iii) compression-molding the result mixture into a container by a compression mold under the pressure of about 3 Kg/cm.sup.2, iv) steaming the compression-molded container in a steaming box for about 30 minutes at a temperature in the range of about 85.degree. C.-95.degree. C. and drying, and v) applying a resin coating to inner and outer surfaces of the container and drying.

Claims7

Dependent claims

A method for manufacture of a biodegradable disposable container comprising the steps of:

(i) mixing 40-46 weight % of fine granular sawdust powder with 29-35 weight % of a liquid protein, and agitating;
(ii) mixing the resultant mixture of step (i) with 17-23% of a starch and 4-6% of sodium metaphosphate and agitating;
(iii) compression-molding the resultant mixture of step (ii) into a container under a pressure of about 3 Kg/cm.sup.2 ;
(iv) steaming the container of step (iii) in a steaming box for about 30 minutes at a temperature in the range of about 85.degree. C.-95.degree. C., and drying;
and
(v) applying a resin coating to inner and outer surfaces of the resultant container of step (iv) and drying.

3 more elements

Dependencies are inferred from the claim text.

Method for manufacture of biodegradable disposable container

Life of this patent

Method for manufacture of biodegradable disposable container

Life of this patent

Abstract

Claims7