METHOD FOR REMOVING FLAKE FOREIGN MATTER IN RECYCLING OF PET BOTTLE

PROBLEM TO BE SOLVED: To inexpensively and accurately remove foreign matter contained in a bottle ground material in order to effectively putting the recycle material of a PET bottle to practical use to effectively use the same as a raw material of engineering plastic in large quantities and to inex...

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Bibliographische Detailangaben
Hauptverfasser:	ADACHI NAGAYASU, MEKATA TETSUO
Format:	Patent
Sprache:	eng
Schlagworte:	CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT CRUSHING, PULVERISING, OR DISINTEGRATING CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROMSOLID MATERIALS OR FLUIDS MAKING GRANULES OR PREFORMS MILLING GRAIN OTHER SEPARATING BY DRY METHODS APPLICABLE TO BULK MATERIAL,e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED PREPARATORY TREATMENT OF GRAIN FOR MILLING RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS SEPARATING SOLIDS FROM SOLIDS SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS SEPERATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, ORSIFTING OR BY USING GAS CURRENTS SORTING TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To inexpensively and accurately remove foreign matter contained in a bottle ground material in order to effectively putting the recycle material of a PET bottle to practical use to effectively use the same as a raw material of engineering plastic in large quantities and to inexpensively provide pellets, which can be molded into a molded product reduced in the content of foreign matter when molded into an injection mold product, to a user in large quantities. SOLUTION: The method for removing flake foreign matter is adapted when a recovered PET bottle is reutilized and has a process (A) for selectively removing a metal in the ground foreign matter present in ground flakes by a metal detector, a process (B) for irradiating the ground foreign matter present in ground flakes with light to measure the brightness of the surfaces of the flakes to selectively remove foreign matter low in brightness, a process (C) for washing the ground flakes and a process (D) for sorting the ground flakes on the basis of specific gravity.