METHOD OF TAKING UP POROUS STRAND

PURPOSE:To obtain the titled product that can give porous pellets for water treatment that are excellent in treatment of oil and whose particle diameter distribution is narrow, by taking up, in a specified manner, strands that have been produced by melting and extruding a mixture of a thermoplastic...

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Bibliographische Detailangaben
Hauptverfasser:	HABARA HIDEAKI, SAIKI SUMITO, SUGIMORI SHIYUUICHI, KAWAMURA TOMIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MAKING GRANULES OR PREFORMS METALLURGY 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 THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain the titled product that can give porous pellets for water treatment that are excellent in treatment of oil and whose particle diameter distribution is narrow, by taking up, in a specified manner, strands that have been produced by melting and extruding a mixture of a thermoplastic organic polymer and a blowing agent. CONSTITUTION:The mixture of a thermoplastic organic polymer (e.g. polyethylene, etc.) and a decomposable blowing agent (e.g. azodicarbon amide, etc.) is melted and extruded at a temperature equal to or higher than the decomposition temperature of the blowing agent through a plurality of nozzles (preferably circular nozzles having a inner diameter of 1-2mm.), and the thus formed porous strands whose surfaces are well roughened are stretched and taken up in a water stream that is running in the direction of the taking-up. EFFECT:If the strands happen to break, the broken strands fuse of their own, and therefore labor is not required in the take-up operation.