Process Of Preparing A Cellular Product By Removal Of Material From A Solid Polymer-containing Matrix Without Expanding The Matrix; Composition Which Is Nonexpandible And Is Designed To Form A Cellular Product By Said Process; Or Process Of Preparing Said Composition Patents (Class 521/61)
Mixture of solid polymers present during cell formation (Class 521/62)
Cellular product-forming process wherein the removable material is present or is produced in situ during the solid polymer formation step (Class 521/63)
Removing a liquid to form a cellular product (Class 521/64)
  • Method of making porous polymer containing separators for electrolytic electrical devices
    Patent number: 4099218
    Abstract: A method of making porous polymer containing separators adapted for use in electrolytic electrical devices, particularly electrolytic capacitors, the separator capable of absorbing and retaining electrolyte and devices utilizing the resultant separators. The method includes the steps of loading a semi-liquid or liquid polymer containing material with at least one compound and at least one modifier material, solidifying the polymer containing material, and removing at least some of the compound to provide a porous polymer containing separator capable of absorbing and retaining electrolyte. When the separators of the present invention are utilized in electrolytic capacitors, especially aluminum electrolytic capacitors, reductions in capacitor volume without significant loss of capacitance are realized and capacitor manufacture is facilitated.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: July 4, 1978
    Assignee: P.R. Mallory & Co. Inc.
    Inventors: Gerhart P. Klein, Ivan L. Wingood, Jr.