Machinery | technology PE-RT PIPE
Third turnkey extrusion line will make PE-RT piping for heat exchangers
Germany-based Enetec Plastics has bought a third complete extrusion line from KraussMaffei Berstorff, to make five-layer PE-RT pipes for heat exchanger systems. The new system will be
commissioned by the end of this year, joining two identical systems that make 8-32mm pipe.
“It was important to have a partner offering a turnkey system – enabling us to manufacture more than me-too products,” said Michael Frenzel, managing director of Enetec. The system includes a KM 5L-RKW 01-40 five-layer pipe head, which KraussMaffei Berstorff says is unique within the industry. “We have designed a pipe head that combines multiple
MEDICAL TUBING Microextrusion line aimed at catheters
Natvar of the US, part of Tekni-Plex, has launched a new tight-tolerance microex- trusion medical tubing line. Microextrusion tubing is used in demanding neurovascular interventional therapies and surgical applications. More expensive materials such as glass and fluoropolymers have typically been used to make this tubing as they can consistently hold tolerances. “We can microextrude monolayer,
co-extruded multi-lumen tubing or profiles in a variety of thermoplastic materials at CPK1 values above 2.0,” said Bob Donohue, general manager of Natvar. “The ability to run thermoplas- tics means that medical device compa-
www.pipeandprofile.com
nies can realise desired performance attributes at a fraction of the cost associated with fluoropolymers and glass.”
The new microextrusion tubing
comes in wall thicknesses ranging from .003 to .005in. It can be co-extruded in up to four layers. The manufacturing line can also run fluoropolymers to deliver specific attributes – or when the company wants to avoid validating costs associated with a different material. Target applications for the microex- trusion tubing line include IV cannulas, paediatric devices and infant micro- catheters. ❙
www.tekni-plex.com
June 2017 | PIPE & PROFILE EXTRUSION 49
in pipe production. The pipe head is fed by six
single-screw extruders, each with its own gravimetric material metering so that different layer thicknesses can be configured accurately. Overall, there is a main
spiral distributor principles,” said Andreas Kessler, general sales manager of KraussMaffei Berstorff in Munich. “Using the pipe head,
manufacturing multi-layered pipes with perfect layer thickness distribution becomes possible at high line speeds.” The inner layer is led over
an axial spiral, while the layers of EVOH bonding material are distributed over three spiral distributors, while a conical spiral has been selected for the outer layer. The main advantage of the design is the exact distribution of the layers, which allows for a significant reduction of the material costs
extruder for the PE-RT inner layer and a co-extruder for the PE-RT outer layer. Two further co-extruders plasticise the raw material for the layers of bonding material, into which the EVOH oxygen barrier layer is embedded. A further extruder is installed as a piggyback on the main extruder. A sixth extruder, also installed as a piggyback solution, takes over appli- ance of the strips. ❙
www.kraussmaffeiberstorff.com
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