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Keicher Extruders

World Class Solution in PTFE Extrusion and UHMW-PE Technology

PTFE extrusion process with a Paste Extruder

Paste extrusion is a process fort he production of thin hoses, thick tubes (liners), wire insulation and unsintered tapes of PTFE. For the PTFE Paste extruder exclusively emulsion polymerization powder is used. The paste is a mixture of these spongy PTFE powder types with wetted organic fluids.

The process is done in batch quanitities:

The PTFE lubricant mixture firstly is pre-pressed to so-called pre-forms and then put into PTFE Paste extruder which works on the priciple of the ram extrusion. Then the pre-form is pressed through a conic nozzle in cold or slightly pre-heated condition. The extrudate is separated from the still containing lubricant within the drying zone and then sintered.