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A relaxation device for non-Newtonian fluids, comprises a cylinder (2) with an adjustable purging member (1) which moves along the fluid flow axis and creates a narrower flow cross-section than the area behind, along the flow direction. In a process for degassing non-Newtonian fluids involving multi...

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Bibliographische Detailangaben
Hauptverfasser:	OBSCHERNINGS, HERMANN, KRAPPITZ, WERNER, BEHER, KLAUS, SCHWAGRZINNA, THOMAS
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MAKING GRANULES OR PREFORMS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS SEPARATION 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:	A relaxation device for non-Newtonian fluids, comprises a cylinder (2) with an adjustable purging member (1) which moves along the fluid flow axis and creates a narrower flow cross-section than the area behind, along the flow direction. In a process for degassing non-Newtonian fluids involving multi-stage relaxation; a plastic melt is compressed between two relaxation stages, with an additive to aid extraction of volatile substances added in a mixer prior to the next relaxation stage. Pressure in the mixing zone is controlled by the claimed relaxation device, arranged between the mixing zone and the next degassing stage.