A method of absorbing resin into part of a panel of particleboard to provide local strength increases in that part. The method comprises subjecting the part to an electric field, immersing the panel in the resin; and then resubjecting the panel to the electric field to cure the resin. A particleboard panel is also disclosed. The panel has a main body with a specific gravity in the range 0.2 to 0.5 but at least one area on its periphery has a specific gravity in the range 0.7 to 1.0. The one area is impregnated with a synthetic resin. The panel is particularly useful in door production as it is strong but cheap.
The specification discloses a shell for luggage and the like comprising wood fibers, glass fibers, paper scrap, glass beads, and plastic resin. The mixture is blended with water to form a slurry, is vacuum formed and is then molded under heat and pressure.
A process for subjecting an electroset material to an evacuated environment rior to electrosetting results in a material with anisotropic density programmability. Articles can be fabricated with an anisotropic void distribution therein.
The present invention comprises improved electroset materials and processes. Electroset materials with electrically programmable electric and mechanical properties comprise electrically polarizable particles immersed within the suspended within castable dielectric fluids. The polarizable particles may comprise ions or, alternatively, electrically conductive or semiconductive particles.
A phase changing composition for making articles that can be influenced as o shape and cure time by the application of an electric field. Also disclosed are apparatus and processes for using the material. The composition is characterized in that under the influence of an electrostatic field, the cure time of the composition is significantly shorter.
A method of manufacturing a door skin includes the steps of providing a wood composite flat blank. The blank is placed between the platens of a heated press, the platens being heated to a temperature sufficient to soften the resins in the blank and to thereby soften the blank. Sufficient pressure is applied to close the platens and thereafter the pressure is cyclically applied to increased pressure levels for thereby causing the blank to be deformed into a molded shape determined by the configuration of the platens. The molded blank is then removed from between the platens.
