Method of forming a polymeric casing with textured surface

Details Method of forming a polymeric casing with textured surface Method of forming a polymeric casing with textured surface

1988-10-20

1990-09-04

Simmons, David

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264293, 264301, B29C 4100

Patent

active

049543091

ABSTRACT:
A polymeric casing with a textured (matte-finish) surface is manufactured by dipping a form having external contours conforming to the desired shape of the casing in a solution of a polymer dissolved in one liquid, withdrawing the form from the solution to retain the solution as a film over the form's outer surface, applying a second liquid over the surface of the film, the second liquid being one which is miscible with the first and in which the polymer is insoluble, then solidifying the polymer into a solid film, preferably by solvent evaporation. Application of the second liquid prior to complete drying of the polymer film causes the resulting film to have a matte finish, which has a lubricous effect without the need for added lubricant powders or liquids, particularly when combined with a mandrel which imparts a similar surface finish to the interior of the film.

REFERENCES:
patent: 4061709 (1977-12-01), Miller et al.
patent: 4684490 (1987-08-01), Taller et al.

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