Treofan Germany Gmbh & Co. Kg

Hoechst Trespaphan Gmbh

Hoechst Trepaphan Gmbh

Robert Hansohn

Angela Speith-Herfurth

Wolfgang Rasp

Detlef Schumann

Leo Wintrich

Frank Ernst

Stefan Bunk

The invention relates to a method for the transverse drawing of an unoriented or longitudinally-oriented film web made from thermoplastic plastic. According to said method, an undrawn or longitudinally-drawn film () is introduced into a transverse drawing frame in which heater fields () are heated to a transverse drawing temperature T, in the attached drawing fields () a clip chain is drawn in the transverse direction by divergent (V-shaped) guides and a temperature Tis applied to fixing fields where T&#x3e;T. In the drawing fields and/or the heating fields () the boundary zones () of the film () are heated or thermally insulated such that the boundary zones () of the film () have a higher temperature than the middle of the film web () on transverse drawing and/or fixing.

Method and device for the transverse drawing of a material web

The invention relates to a multi-layer biaxially oriented polypropylene film consisting of a base layer at least one first cover layer. The base layer contains a hydrocarbon resin, and the cover layer contains a polydialkylsiloxane with a viscosity of at least 200.000 mm/sec. The first cover layer is provided with a cold-seal adhesive coating on its outer surface.

Biaxially oriented polypropylene film provided with a cold-seal adhesive coating and having excellent lubricating properties

The invention relates to a multi-layer, sealable, biaxially oriented polypropylene film having improved barrier properties which is constructed of a base layer, of at least one sealable covering layer and of at least one intermediate layer. The intermediate layer contains a wax with an average molecular weight Mn ranging from 200 to 1200. The invention also relates to a method for producing the film and to the use thereof.

Multi-layer biaxially oriented polypropylene film having an improved barrier, a method for the production thereof, and the use thereof

The invention relates to a multi-layer, sealable biaxially oriented polypropylene film consisting of a base layer and at least one sealable covering layer. The base layer contains between 1 and 15 weight % of a resin with a mean molecular weight Mw of between 600 and 1,500 and between 1 and 6 weight % of a wax with a mean molecular weight Mn of between 200 and 700. The n-heptane insoluble part of the polypropylene of the base layer has a chain isotactic index of at least 95%, as measured by C-NMR spectroscopy. The invention also relates to a method for producing said film and to its use.

Heat sealable, biaxally oriented polypropylene film with improved barrier properties

Oriented multilayer polyolefin film which is heat-sealable on both sides, its use, and process for its production. An oriented multilayer polyolefin film which is heat-sealable on both sides and is printable, made from at least one base layer and, on both sides, heat-sealable outer layers, which film contains a hydrocarbon resin. Both outer layers contain silicone oil and at least one surface of the film is surface-treated.

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Kirkel, Germany

Robert Hansohn