VERFAHREN ZUR VERRINGERUNG DER PERMEATION VON BLASGEFORMTEN HOHLKOERPERN AUS THERMOPLASTISCHEN KUNSTSTOFFEN

VERFAHREN ZUR VERRINGERUNG DER PERMEATION VON BLASGEFORMTEN HOHLKOERPERN AUS THERMOPLASTISCHEN KUNSTSTOFFEN

1. A method for reducing the permeability of blow moldings of thermoplastics, in particular of high molecular weight HDPE, in which a tubular parison is expanded within a blow mold by means of a blow gas and caused to rest against the internal contour of the blow mold, and the blow molding is expose...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: WIELAND,OTMAR, LOHRBAECHER,VOLKER
Format: Patent
Sprache:ger
Schlagworte:
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
PERFORMING OPERATIONS
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
TRANSPORTING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:1. A method for reducing the permeability of blow moldings of thermoplastics, in particular of high molecular weight HDPE, in which a tubular parison is expanded within a blow mold by means of a blow gas and caused to rest against the internal contour of the blow mold, and the blow molding is exposed to the action of a reactive treatment gas, wherein the blow molding is brought into contact with the reactive treatment gas in a cooling mold at a temperature of not less than 110 degrees C at the internal surface of the said molding.