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Method for Making Controlled Porosity Elastomer Films

IP.com Disclosure Number: IPCOM000110485D
Original Publication Date: 1992-Nov-01
Included in the Prior Art Database: 2005-Mar-25
Document File: 1 page(s) / 24K

Publishing Venue

IBM

Related People

Taft, LG: AUTHOR

Abstract

Disclosed is a method for making elastomeric films with a controlled porosity.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Method for Making Controlled Porosity Elastomer Films

      Disclosed is a method for making elastomeric films with a
controlled porosity.

      Typically, films can be made by breaking an emulsion of polymer
in water.  The emulsion is often broken by changing the pH and
freezing the emulsion, while depositing on a rotating drum.  When the
emulsion deposits on the rotating drum, ice crystals form in the
interstices of the polymer film.  These ice crystals are later
thawed, washed and removed from the film, leaving pores that are
remarkably uniform.  These films then can be used as screens,
filters, etc.  The method is applicable to any film forming polymer
that can be made into an emulsion, and cast onto a support such as a
drum, substrate, or other device to hold the polymer during film
formation.

      Disclosed anonymously.