Recycling polyurethane or polyurea scrap - by disintegrating, removing unwanted material in cyclone, heating in an air draught, and forcing under pressure into mould

In a process for the recycling of scrap plastic materials, and partic. polyurethane or polyurea, the scrap is first reduced to e.g. chips or granules of particle size of less than 5mm pref. no more than 3mm; the particles are then heated and, at between 170-240 deg.C. and under a pres-ure of at leas...

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Bibliographische Detailangaben
Hauptverfasser:	SCHAPER, HERBERT. DR., 2000 HAMBURG, DE, BENDIKS, ERNST, 2110 BUCHHOLZ, DE, LEITNER, HORST, 2100 HAMBURG, DE
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MAKING GRANULES OR PREFORMS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS 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:	In a process for the recycling of scrap plastic materials, and partic. polyurethane or polyurea, the scrap is first reduced to e.g. chips or granules of particle size of less than 5mm pref. no more than 3mm; the particles are then heated and, at between 170-240 deg.C. and under a pres-ure of at least 300 bars, they are forced at a speed of 0.03 to 0.5m/sec. into a mould. ADVANTAGE - The process solves the problems of disposal of the large mouldings used e.g. for car bumpers or spoilers both environmentally favuorably and economically.