Polymeric casing with textured surface

Details Polymeric casing with textured surface Polymeric casing with textured surface

B - Operations, Transporting

29

C

18/807

B29C 41/14 (2006.01) B29C 37/00 (2006.01) B29C 41/00 (2006.01) B29D 22/00 (2006.01)

Patent

CA 1312718

17 POLYMERIC CASING WITH TEXTURED SURFACE ABSTRACT OF THE DISCLOSURE 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 immiscible 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. A18/12124-2-1F

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