General Electric Company

Sabic Global Technologies B.v.

General Electric Corporation Gmbh

Ulrich Hofmann

Herve Cartier

Jasper R Bouma

Peter O Stahl

Werner Woerhle

Geert Tamboer

Piet J Bolluijt

Jan Peter Keulen

Christiaan Henricus Koevoets

Richard Schouwenaar

Jan P H Keulen

Eric Reitjens

Eric Rietjens

Christian Henricus Koevoets

In one embodiment, a tool, comprising: a tool stationary portion comprising a nozzle and a film gate; and a tool movable portion comprising a shut off pin opposite the nozzle and the film gate; wherein the shut off pin prevents polymer melt in the nozzle from leaking into a cavity of the tool after injection of polymer into the tool.

Shut off nozzle system and methods for making and using the same

The above described deficiencies and drawbacks are overcome by the process for making poly(arylene ether)-polyamide compositions which comprise about 10 weight percent (wt %) to about 90 wt % poly(arylene ether), about 90 wt % to about 10 wt % polyamide, about 0.01 wt % to about 10 wt % compatibility modifier, and optionally other additives known in the art. The process comprises several components which can be employed singly or in combination, namely: utilizing resins and additives that are substantially free of gaseous oxygen (air-free; e.g. less than about 1.0 vol % oxygen preferred, and less than about 0.5 vol % oxygen especially preferred, and less than about 0.05 vol % especially preferred); melting and compounding under an atmosphere which is substantially air-free; adding up to 20 wt % of polyamide to the poly(arylene ether) before compounding; when employing an extruder with an atmospheric vent, operating with the atmospheric vent open; and performing the injection molding under an inert atmosphere.

Reduction of carbonized particles in a poly(arylene ether)-polyamide composition

Reduction of carbonized particles

Growing community of inventors

Gladenbach, Germany

Ulrich Hofmann