Patent · US Expired

Process and apparatus using liquefied gas for making plastic particles

US5582779A · kind A · utility

8Cited by

10References

21Claims

0Family size

Assignee

Messer Griesheim GmbH · DE

Inventors

Gerhard Gross · Achern, DE
Birgitta Meier · Moers, DE
Johannes Vetter · Meerbusch, DE
Peter Steinau · Mainz, DE

Key dates

Filing date	Jun 15, 1994
Grant date	Dec 10, 1996
Priority date	—
Expiry date	Jun 15, 2014

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29B2009/125
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a process for the solvent-free and dry production of particles from plastics. According to the invention, the plastic is heated to form a viscous material, in this form, is conveyed as material stream through an outlet into a comminution device and there, with spraying of a pressurized liquid atomization medium against it, is comminuted into fibrids and/or fine particles.

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