Method of producing porous plastic materials
First Claim
1. Method of making porous plastic bodies comprising the steps of dispersing in a fluxable polymer, substantially unplasticized, at least about 45 volume percent of a water-soluble material in particle form and blending therewith a channel-forming water-soluble liquid of less than 10,000 poise at the processing temperature of the polymer, the amount of said liquid being from 0.1 to 15 volume percent to form a network of channels interconnecting the dispersed particles, fluxing and solidifying the polymer blend containing said particles and liquid into a polymer body, and thereafter extracting with water said solid and liquid materials to form a porous plastic body.
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Abstract
Method of producing porous synthetic plastic compositions by blending into a polymer at least about 45 volume percent of a plastic-insoluble, water soluble particulate material and a liquid at processing temperatures, capable of forming channels between the solid particles. The blend is then formed into any desired product such as by calendering, extruding or molding and thereafter the water soluble particulate matter and channel forming liquid are leached with water from the product to form a porous plastic.
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Citations
5 Claims
- 1. Method of making porous plastic bodies comprising the steps of dispersing in a fluxable polymer, substantially unplasticized, at least about 45 volume percent of a water-soluble material in particle form and blending therewith a channel-forming water-soluble liquid of less than 10,000 poise at the processing temperature of the polymer, the amount of said liquid being from 0.1 to 15 volume percent to form a network of channels interconnecting the dispersed particles, fluxing and solidifying the polymer blend containing said particles and liquid into a polymer body, and thereafter extracting with water said solid and liquid materials to form a porous plastic body.
Specification