BIODEGRADABLE MOLDED PACKING

摘要

A method for making molded packing shapes comprising the sequential steps: (1) forming a plurality of particles comprising a foamed admixture of starch, biodegradable polymer and water; (2) applying to the surface of the particles an unheated aqueous liquid to effect wetting and softening of the surfaces of the particles; and (3) without applying extraneous heat to the system, compressing the surface-softened particles within a confined space to effect cohesion between the surfaces of the softened particles and formation of an article in the form of the confined space; and (4) maintaining the shaped article under such compression for a time sufficient to render the surface of the particles non-tacky by adsorption of the wetting liquid into the particles and by evaporation of the wetting liquid.