Moulded prods., esp. hollow tubing etc., with oxygen barrier layer

Moulded prods. with an oxygen barrier layer, esp. hollow section mouldings, comprise a first layer (A) made of organosilane-grafted polyolefin and an oxygen barrier layer (B) consisting of material which can form covalent bonds with the grafted organosilane gps. in layer (A) and which is coextruded...

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Bibliographische Detailangaben
Hauptverfasser:	GRAMMLING, FRANZ., 74336 BRACKENHEIM, DE, HONC, PETER, 70771 LEINFELDEN-ECHTERDINGEN, DE, FRITZ, HANS-GERHARD, DR., 73066 UHINGEN, DE, RAMBACHER, GERHARD, 74336 BRACKENHEIM, DE
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BLASTING CHEMISTRY COMPOSITIONS BASED THEREON ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM LIGHTING MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PIPES SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THEIR PREPARATION OR CHEMICAL WORKING-UP THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	Moulded prods. with an oxygen barrier layer, esp. hollow section mouldings, comprise a first layer (A) made of organosilane-grafted polyolefin and an oxygen barrier layer (B) consisting of material which can form covalent bonds with the grafted organosilane gps. in layer (A) and which is coextruded directly onto layer (A) under pressure. Also claimed is the prodn. of these mouldings, in which the melt streams for layers (A) and (B), and opt. for a base layer and another barrier layer, are fed into an extruder head and coextruded in close contact at up to 300 bar.