EXPANDABLE THERMOPLASTIC RESIN COMPOSITION AND PRODUCTION OF FOAM-INSULATED WIRE

PURPOSE:To obtain a composition which, when used in expansion extrusion molding, forms very little or no deposit such as black foreign matter, resin deposit, plate-out and buildup at the screw or die, etc., of an extruder and can allow long-time continuous covering of a foam-insulated wire. CONSTITU...

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Bibliographische Detailangaben
Hauptverfasser:	SAGARA YOSHINORI, HAGA YOSHIJI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G BASIC ELECTRIC ELEMENTS CABLES CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CONDUCTORS ELECTRICITY GENERAL PROCESSES OF COMPOUNDING INSULATORS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a composition which, when used in expansion extrusion molding, forms very little or no deposit such as black foreign matter, resin deposit, plate-out and buildup at the screw or die, etc., of an extruder and can allow long-time continuous covering of a foam-insulated wire. CONSTITUTION:A thermoplastic resin composition comprising a thermoplastic resin (A) such as polyethylene, a powdered blowing agent (B) such as azodicarbonamide and a powdered inorganic filler (C) such as silica, wherein the ratio of the mean particle diameter of component (B) to that of component (C) is 0.5/1 or above, desirably 0.8/1-2.3/1.