Automatik Plastics Machinery Gmbh

Lurgi Zimmer Gmbh

Shell Oil Comapny

Zimmer Aktiengesellschaft

Maag Automatik Gmbh

Technip Zimmer Gmbh

T.en Zimmer Gmbh

Stefan Deiss

Frank Gloeckner

Kevin Dale Allen

Brigitta Otto

Klaus Mackensen

Edward James Denton

Horst Mueller

Thomas Louis De Lellis

James Gao Lee

Eckhard Seidel

Stefan Dahlheimer

Michael Reisen

Holger Bachmann

Klaus Kirsten

Frank Glöckner

Karl-Heinz Heldmann

Ludwig Hölting

Reinhardt-Karsten Mürb

Reinhardt-Karsten Muerb

Gerald Kriesche

Roland Schäfer

Lutz Janko

Martin Baumert

Burkard Kampfmann

Maurice Koch

Maik Rau

Raimund Schwarz

Horst MÜLLER

Hoger Bachmann

Nazim S Hally

Mike Rau

The invention relates to a method for producing a plastic granulate (), in which a process fluid () is contained in a process chamber () where an underwater granulation takes place and the process fluid in the process chamber has a temperature greater than 120&#xb0; C. A process pressure of at least 2.0 bar is obtained in the process chamber, at which a granulation of the plastic strands () into plastic granulate occurs. From the process chamber, a mixture () of process fluid and plastic granulate is diverted into a first cooling zone () during cooling of the plastic granulate, while maintaining the process pressure. In a first separating device (), the plastic granulate is separated from the process fluid under process pressure. In the process chamber, the process fluid has a temperature in the range from 120&#xb0; C. to 160&#xb0; C., and the process pressure obtained there is greater than the pressure of the vapour pressure curve of the process fluid. After separation from the process fluid in the first separating device, the plastic granulate is fed continuously in a line to a dealdehydization container ().

Method for producing a plastic granulate

The present invention relates to a method for the production of polyamide 6 with low extract content and a device for it. Here, a melt of non-extracted polyamide 6 is cleaned from monomer and oligomers in a degasification device in vacuum, wherein the vapor being withdrawn from the degasification device by the vacuum generation device is cleaned from monomer, oligomers and optionally water at first in a direct condenser which is operated with liquid &#x3b5;-caprolactam and subsequently in a pre-separator which is cooled with a coolant, before it reaches the vacuum generation device. A particularly preferable variant of the method envisages the usage of the melt of polyamide 6 with low extract content so prepared in a direct process of spinning into textile fibers and/or filaments.

Method and device for the production of polyamide 6 with low extract content

A method and device for continuously drying and crystallizing water-flushed granulate. The method comprises the steps of: feeding water-flushed granulate into a pre-dryer, pre-drying granulate in the pre-dryer, conveying pre-dried granulate into a dryer/crystallizer, and discharging crystallized granulate from the dryer/crystallizer. An air conditioning means produces temperature-controlled and humidity-conditioned air that is delivered to the dryer/crystallizer, wherein the exhaust air of the dryer/crystallizer is delivered to the pre-dryer, and wherein the exhaust air of the pre-dryer is returned to the air conditioning means forming a closed air circuit is formed by the dryer/crystallizer, pre-dryer, and air conditioning means. The device comprises a pre-dryer, a dryer/crystallizer, an air conditioning means, and optionally a control unit.

Device for drying and crystallizing granulate

The invention relates to a device for the implementation of a method for the production of pellets of polyamide 6 or copolyamides. The method can include production of a melt of polyamide 6 or copolyamides by means of polymerization, production of pellets from the melt by means of underwater pelletization into a process fluid, removal of the pellets from a site of underwater pelletization in the process fluid, supply of the pellets in the process fluid to an extraction stage, extraction of low-molecular components as extract, and drying of the pellets after extraction, wherein the underwater pelletization stage and the extraction stage take place using the same process fluid.

Method and device for the production of polyamide

A process for production of polyethylene terephthalate pellets includes the steps of: production of a melt of polyethylene terephthalate material; production of polyethylene terephthalate pellets from the melt by means of underwater pelletization into a process fluid; removal of the polyethylene terephthalate pellets from the site of underwater pelletization in the process fluid; crystallization of the polyethylene terephthalate pellets in the process fluid, wherein a surface of the polyethylene terephthalate pellets is crystallized and an interior of the polyethylene terephthalate pellets remains amorphous.

Process for production of polyethylene terephthalate pellets

One or more embodiments of a device for avoiding the uncontrolled discharge of melt from nozzle apertures of a nozzle plate are provided. The device can include a locking member that is movable in front of the nozzle plate. The locking member can be formed as an extrudate collection member. The locking member can be reciprocable between a production position and a collection position. And melt can be discharged from the nozzle apertures of the nozzle plate in the form of extrudates into a process chamber when the locking member is in the production position and into extrudate collection member when the locking member is in the collection position. The device can also include a melt extraction aperture disposed on the extrudate collection member. The melt extraction aperture can be configured to align with the nozzle apertures in the nozzle plate and a melt extraction channel.

Device for avoiding the uncontrolled discharge of melt from a nozzle plate

A drop pelletizing device and method for producing pellets from a low-viscosity plastic melt are provided. The drop pelletizing device can include a die plate with holes, in which the plastic melt can be subjected to a harmonic pressure oscillation such that the plastic melt emerging from the holes forms individual pellet droplets, a pressure vessel, in which prevails an overpressure above the ambient pressure, a discharge device adapted to discharge the individual pellet droplets from the pressure vessel and to reduce the overpressure, a separator adapted to separate the individual pellet droplets from the coolant; and at least one circulating device adapted to agitate the coolant to separated and unclump the individual pellet droplets in the coolant and for producing turbulence within the coolant.

Drop pelletizing device and method for the operation thereof

The invention relates to a continuous method for the direct production of multilayer mold bodies from a highly condensed polyester melt.

Method for the direct and continuous manufacture of polyester moulded bodies with low acetaldehyde content

A method of making shaped articles from highly condensed polyester melt and especially preforms for the blow molding of food and especially beverage containers. A melt is continuously withdrawn from the polycondensation reactor and is fed to the shape-imparting units, especially a multiplicity of injection-molding machines without solidification between the final reactor and the injection molders and without degassing between the final reactor and the injection molding machines.

Method for the direct and continuous production of hollow articles from a polymer melt

Thermoplastic polyesters are made by a method in which precondensation is carried in a column whose sections are formed with structured packings and operated at subatmospheric, pressure.

Method of making polyesters

A method is described for the manufacture of polyesters of aromatic dicarboxylic acids with aliphatic and/or cycloaliphatic dials, in which an aromatic dicarboxylic acid in the presence of a monocarboxylic acid or a mixture of a monocarboxylic acid present in a saturated solution with water or another suitable solvent is converted with an aliphatic or cycloaliphatic dial to a dicarboxylic acid alkanediolestercarboxylate and/or its oligomers, which are polycondensed in further process steps to the polyester.

Method for the manufacture of polyesters

Disclosed is a process for reducing the self-adhesiveness of polytrimethylene terephthalate pellets, which can be carried out in a continuous or batch manner comprising the steps of:

Process and apparatus for crystallization of polytrimethylene terephthalate (PTT)

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Harxheim, Germany

Stefan Deiss