JPS5924847B

PURPOSE:To regenerate a metallic filter at a very high efficiency by a method wherein a metallic filter stuck with a polyolefin based resin is heat-treated in an atmosphere of low oxygen concentration in a predetermined temperature range. CONSTITUTION:A metallic filter such as a metallic net filter...

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Bibliographische Detailangaben
Hauptverfasser:	TAKEDA MASASHI, FURUKO MAMORU
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PURPOSE:To regenerate a metallic filter at a very high efficiency by a method wherein a metallic filter stuck with a polyolefin based resin is heat-treated in an atmosphere of low oxygen concentration in a predetermined temperature range. CONSTITUTION:A metallic filter such as a metallic net filter stuck with the polyolefin based resin such as a polyethylene resin is heat-treated in an atmosphere with an oxygen concentration of not higher than 1%. The heat treating temperature is not lower than the decomposition starting point of the polyolefin based resin and up to 500 deg.C, prefereably 370-420 deg.C. The atmosphere of low oxygen concentration is preferably obtained by replacing with an inert gas such as nitrogen or helium. Accordingly, a high regenerating efficiency can be achieved in a very short period of time without causing changes or damages in the filtering performance.