Kalle Gmbh & Co. Kg

Kalle Gmbh

Rainer Neeff

Klaus-Dieter Hammer

Herbert Gord

Michael Seelgen

Klaus Berghof

Reinhard Maron

Helmut Sattler

Jens Fögler

Markus Eilers

The present invention provides a seamless tubular film on a cellulose base, being produced by extruding an aqueous cellulose N-methyl-morpholine-N-oxide spinning solution. The maximum degree of roughness R is from greater than 0.1 &mgr;m to 0.5 &mgr;m and an average degree of roughness R is from 0.005 to 0.014 &mgr;m. On the surface of the tubular film is formed in contact with an electrolyte an electrokinetic potential, the size of which depends on the pH value of the electrolyte.

Seamless tubular film and methods and devices for producing a seamless tubular film materials

The invention relates to a film tube ( ) based on cellulose which is produced by extruding an aqueous cellulose-N-methyl-morpholine-N-oxide (NMMO) solution through a ring nozzle ( ) onto a lining ( ). The film tube ( ) is manufactured by means of a vertically descending spinning in a spinning vat ( ) in which a spinning bath ( ) is located. The film tube ( ) which is submerged in the spinning bath ( ) passes through an air gap ( ) between the underside of a nozzle block ( ) and the upper surface of the spinning bath ( ) and, internally, is pressurized, supported and slightly stretched in a transversal manner by compressed air. The film tube ( ) is filled with an inner bath solution ( ) via a supply tube ( ). An idle roller ( ) is situated near the bottom of the spinning vat ( ) in order to guide the film tube ( ) around and, afterwards, out of the spinning vat ( ) in an upward sloping manner. The film tube is laid flat along a contact section ( ) of the idle roller ( ).

Method and apparatus for the manufacture of a tube made of film on a cellulose basis which an insert reinforces

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Wiesbaden, Germany

Rainer Neeff