Patent · US Active

Method and device for granulating polymer melts containing blowing agent

US8795562B2 · kind B2 · utility

1Cited by

17References

13Claims

0Family size

Assignee

BASF SE

Inventors

Paulus Schmaus · Ludwigshafen, DE
Michael Heeger · Ludwigshafen, DE
Joachim Ruch · Monsheim, DE
Jan Holoch · Leimen, DE
Christian Rasch · Lichtenfels, DE

Key dates

Filing date	Mar 15, 2007
Grant date	Aug 5, 2014
Priority date	—
Expiry date	Sep 7, 2027

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C44/3461
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a process and an apparatus for pelletizing polymer melts comprising blowing agent in a pelletizing chamber through which a liquid flows, its pressure being above the ambient pressure. In a first step, the polymer melt is injected into the pelletizing chamber, in a second step the polymer melt is cut via a cutting apparatus into individual pellets and, in a third step, the pellets produced in the pelletizing process are discharged with the liquid from the pelletizing chamber and are then isolated from the liquid. This process also comprises at least one of the following steps:

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