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AssigneeOkura Kogyo Kabushiki Kaisha
InventorsTakasi Saheki, Hideaki Matsuda
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In the case of extruding a W/O type emulsion having a high viscosity obtained by stirring a mixture of a vinyl monomer solution composed of a vinyl monomer which is water insoluble and in a liquid state at normal temperature, a surface active agent having a hydrophilic-lipophylic balance of 3 to 6, and a polymerization catalyst with water, cement, and synthetic fibers through a die, at least one rectifying plate having a given form is disposed in the die near the outlet thereof to direct the synthetic fibers in the W/O type emulsion to the extruding direction. When the tabular plate obtained by extrusion-molding the W/O type emulsion by the method of this invention is hardened and dried, a light-weight and high-strength plastic concrete suitable for building materials is obtained.
A method of extrusion molding a W/O type emulsion obtained by stirring a mixture of a vinyl monomer solution composed of a vinyl monomer which is water insoluble and in a liquid state at normal temperature, a surface active agent having a hydrophilic-lipophilic balance of 3 to 6, and a polymerization catalyst, water, cement, and fibers through a die, wherein the length of said fibers is 3 mm to 12 mm and the aspect ratio thereof is 100 to 1,000, which comprises rectifying the stream of the emulsion in the die near the die lip of the die to direct the fibers in the emulsion to the extruding direction.
An apparatus for extrusion molding a W/O type emulsion containing fibers and cement, comprising an extrusion die equipped with at least one rectifying plate having a tear-drop-shape section in the die near the die lip thereof disposed in the extruding direction so that the round head portion of the rectifying plate is disposed at the opposite side to the die lip and the thin tail portion of the rectifying plate is at the die lip side, the thickness of the round head portion of the rectifying plate being at least 1/2 of the length of the fibers in the W/O type emulsion.
Dependencies are inferred from the claim text.