Method for recycling plastic materials

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 47/64 (2006.01) B29B 17/00 (2006.01) B29B 17/04 (2006.01) B29C 47/68 (2006.01)

Patent

CA 2756733

The invention relates to a method and to an assembly for recycling plastic materials, comprising the following processing steps: a) reprocessing the raw material, wherein the material, if necessary, is comminuted and brought into a fluid-like form and heated and permanently mixed, while preserving the lumpiness and pourability thereof, and optionally the viscosity thereof is increased and/or it is degassed, softened, dried and/or crystallized; b) melting the reprocessed material, at least so much that filtration is possible; c) filtering the melt in order to remove impurities; d) homogenizing the filtered melt; e) degassing the homogenized melt; and t) discharging and/or subsequently processing the melt, such as by granulation, blown film processing, with said processing steps being carried out consecutively in the order listed (FIG. 2).

L'invention concerne un procédé et un système de recyclage de matières plastiques comprenant les étapes de traitement suivantes: a) préparation de la matière brute, la matière étant, si nécessaire, déchiquetée et amenée dans une forme fluidique et chauffée et mélangée en permanence tout en restant en morceaux et en gardant son aptitude à couler, et éventuellement dégazée, ramollie, séchée, sa viscosité étant accrue et/ou la matière étant cristallisée, b) fusion de la matière préparée, au moins jusqu'à ce qu'une filtration soit possible, c) filtration de la masse fondue pour la libérer d'impuretés, d) homogénéisation de la masse fondue filtrée, e) dégazage de la masse fondue homogénéisée ainsi que f) décharge et/ou traitement ultérieur de la masse fondue, par exemple par granulation, production de films de soufflage, ces étapes de transformation se succédant dans l'ordre indiqué (Fig. 2).

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