Coextrusion and Multilayer Extrusion – No Other Topic Has so Many Layers

Efficient Solutions for Specific Requirements in Medical Applications

Thanks to our special core capabilities in extrusion technology, we are able to offer you customised manufacturing of multilayer or co-extruded tubing. Similar to micro extrusion, up to four different materials can be combined in this process.

Typical examples for the layer structure include:

  • PVC / EVA / PE for RAUINERT infusion tubing that prevents loss of active ingredients in medication
  • TPE / Soft-PP, TPE / EVA and EVA / PUR filling tubing for PVC-free infusion containers
  • PVC / PVC RAUSORB or PE / PE RAUSORB tubing for the protection of light-sensitive medicines during infusions

The layer distribution can be modified based on your requirements. It is highly important for a smooth further processing that even multilayer tubing products comply with extremely narrow tolerances and highest quality standards.

Coextruded tubing with several layers consisting of up to four different materials
Coextruded RAUSORB tubing for the protection of light-sensitive solutions

Possibilities of Coextrusion or Multilayer Extrusion

  • Ability to embed several colour or X-ray contrast stripes
  • Multilayer extrusion of up to four materials in a wide range of combinations
  • Variable layer distribution based on economic and application-related aspects
  • Integration of light protection properties
  • Special consideration regarding compatibility within the body and the flow-through medium
  • Use of specific adhesive enhancers when using incompatible polymers

Tubing With X-ray Contrasting Agents are Also Offered With a Full Contrasting or With X-ray Contrasting Lines

Schlauch mit Röntgenkontraststreifen
X-ray contrasting lines in the tubing to enhance visibility on X-ray images

Tubing products with X-ray contrasting characteristics (BaSO4) are produced for various catheter applications. You can choose between the extrusion of tubing with X-ray contrast in the form of a full contrast or with one or several X-ray contrast lines.

In this case, the X-ray contrast agent is either added to the polymeric material (full contrast) or integrated in the form of filled polymers as a line into the wall (liner) of the tubing.

This way, an optimal X-ray contrasting ability is achieved together with a simultaneous transparency of the tubing material. The maximum fill material content of the X-ray contrast agent is 60%.