US 12,617,127 B2Granted

Plastic recycling method for processing plastic waste

AssigneeGRANNEX GmbH & Co. KG

InventorsAndreas Stolzenberg, Markus Börger

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Abstract

A plastic recycling method for processing plastic waste, including providing a plastic waste mixture stream having, on the one hand, a variable proportion of 2D material and a variable proportion of 3D material and, on the other hand, an inhomogeneous density distribution, the proportions varying over time. Washing both proportions of the plastic waste mixture stream together. Shredding both proportions of the plastic waste mixture stream together while supplying a cleaning fluid. Density-based separation of the plastic waste mixture stream into at least two fractions, wherein the separation is performed as a function of a predeterminable density separation cut; and for at least one of the separated fractions: separating the fraction of 2D material and the fraction of 3D material from each other.

Claims23

Dependent claims

A plastic recycling method for processing plastic waste, comprising:

Providing a plastic waste mixture stream having a variable proportion of 2D material and a variable proportion of 3D material in an inhomogeneous density distribution, wherein the 3D portion comprises voluminous plastic waste and the 2D portion comprises sheet plastic waste or film plastic waste, the proportions varying over time;
Joint washing of both portions of the plastic waste mixture stream;
Joint shredding of both portions of the plastic waste mixture stream while supplying a cleaning fluid;
and thereafter:
Density-based separation of the plastic waste mixture stream into at least two fractions, wherein the separation is performed in response to a predeterminable density separation cut;
for at least one of the density separated fractions, separating the fraction of 2D material and the fraction of 3D material from each other.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/029,402Filed 29 Apr 2022
Published: US 2025/0073959 A16 Mar 2025
Granted: 5 May 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

B29B 17/02
Recovery of plastics or other constituents of waste material containing plastics: separating plastics from other materials
B29B 17/04
Recovery of plastics or other constituents of waste material containing plastics: disintegrating plastics, e.g. by milling
B29B 17/0412
Disintegrating plastics, e.g. by milling: to large particles, e.g. beads, granules, flakes, slices
B29B 2017/0015
Pretreating the materials before recovery: washing, rinsing