Patent · US Active

Method and apparatus for comminuting and cleaning of waste plastic

US7757974B2 · kind B2 · utility

22Cited by

4References

47Claims

0Family size

Assignee

CVP Clean Value Plastics GmbH · DE

Inventors

Michael Hofmann · Hamburg, DE
Alexander Feddern · Bad Oldesloe, DE
Jens Löffler · St. Georgen, DE

Key dates

Filing date	Mar 21, 2006
Grant date	Jul 20, 2010
Priority date	—
Expiry date	Nov 21, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/62
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Method for comminuting and cleaning waste plastic, in particular, mixed plastic (MKS) with the following steps: a compacted material, especially, an agglomerate is produced from film scraps or film remnants comminuted into flakes and/or thick-walled plastic parts chopped up into chips, the compacted material is introduced into a disc or drum refiner and is ground therein in the presence of water, wherein the portion of compacted material of the goods located in the refiner amounts to at least 10 percent by weight, a fine grain fraction is removed from the ground stock exiting from the refiner, the remaining ground stock is washed and either mechanically dewatered and dried, or pulverized again in a further refiner stage in the presence of water, and subsequently dewatered and dried.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.