Fresenius Ag

Fresenius Medical Care Deutschland Gmbh

Thomas Kreischer

Klaus Heilmann

Franz Kugelmann

Joern Hoermann

Tobias Weber

Wolfgang Schulz

Thomas Nicola

Michael Zimmermann

Jörn Hörmann

Uwe Ahr

A multilayer film for medical purposes is proposed, with one or two external layers, wherein the external layers contain: a first polyalphaolefin; a first thermoplastic elastomer with a melt viscosity of a melt flow index according to ISO 1133 of from 0.001 to 6 g/10 min at 230&#xb0; C., 2.16 kg; and a second thermoplastic elastomer with a high melt viscosity not measurable according to ISO 1133 which is higher than the melt viscosity of the first thermoplastic elastomer.

Multilayer film, use of a multilayer film and process for producing a multilayer film

The present invention relates to an apparatus for welding tube segments to a tubular shaped body, and to a laser welding method for connecting a tube segment to a tubular shaped body, in which the tube wall of the tube segment is constructed from at least two material layers that differ from each other, and one of these layers contains, at least portionally, an absorber for laser radiation, comprising the steps of provision of a PVC-free tube segment and a tubular shaped body, positive insertion of tube segment and tubular shaped body into one another with the result that surface regions of the tube segment and of the tubular shaped body overlap, irradiation of the overlapping surface regions with laser radiation of defined wavelength, wherein it is unnecessary, in the case of the laser welding method, to move either the joint partners or parts of the apparatus.

Transmission laser welding method for connecting shaped plastic bodies

Multilayer polymer film for a multichamber medical bag and process for

An empty medical bag which is heat sterilized and made of a matrix-phase polymer system. After heat sterilization at 121.degree. C., the inside surfaces do not adhere to each other.

Medical bag

Non-PVC multi-layer film (1) containing an outer layer (2), a supporting layer (4) together with at least one interposed central layer (3), characterized in that the outer (2) and supporting (4) layers contain polymers having Vicat softening temperatures of above approximately 121.degree. C. and that at least one central layer (3) contains polymers having softening temperatures of below approximately 70.degree. C. The non-PVC multi-layer film (1) is particularly suitable for the production of medical bags, in particular multi-chamber bags, as the materials of the individual layers (2-4) are selected in such a manner that the film is transparent and flexible, but in particular also heat-sterilizable, fusible and heat sealable. The film is moreover completely recyclable.

Non-PVC multilayer film for medical bags

Growing community of inventors

Saarbrucken, Germany

Thomas Kreischer