Wolff Walsrode Ag

Wipak Walsrode Gmbh Co. & Kg

Gregor Kaschel

Holger Eggers

Rainer Brandt

Andreas Siegmar Gasse

Bernd Eilers

Rudi Klein

Claudia M&uuml;ller

Antoine Cassel

Heiko Tamke

Dieter Neubauer

Dorit Nelke

Jaquie Richards

Described is a single or multi-layered film having at least one polyamide layer (I) containing dispersed nanoscale nucleating particles. The smallest components of the dispersed nanoscale nucleating particles in layer (I) have an extension of less than 100 nm in at least one randomly selected direction for each component, based on a weighted average of all components of the dispersed nanoscale nucleating particles. Crystalline structures emanating from the surface of the dispersed nanoscale nucleating particles are formed after the layer (I) is cooled from the molten state at a rate of from 10 to 20&deg; C. per minute. The dispersed nanoscale nucleating particles are present in the polyamide layer (I) in an amount of from 10 ppm to 3000 ppm, based on the total weight of layer (I).

Transparent high strength polyamide film

Described is a flexible, multilayered film comprising, (i) an outer layer composed substantially of polyamide containing nanodispersed filing material (e.g., in an amount of from 0.1 and 3 wt. %), and (ii) at least one additional polyamide layer. The multilayered film of the present invention may be produced by flat film or blown film methods. Also described is a method of using the multilayered film of the present invention as a packaging for foodstuff.

High luster, flexible multilayered film with a polyamide outer layer containing nanodispersed filling material and utilization of said film for packaging foodstuffs

A method for packaging food, which comprises packaging food in an at least eight-layer co-extruded, adhesive free and EVOH-free thermoformable film comprised of polyamide, polyolefin, and/or copolymers based on olefins, wherein the film has a first outer layer comprised of polyamide, a second outer layer comprised of a polyolefin or olefin copolymer and the film does not delaminate at temperatures between 50&deg; C. and 150&deg; C.

Method for packaging foods

Described is a film having at least a single layer and at least one copolyamide layer (I) containing dispersed nanoscale nucleating particles. Crystalline structures extending from the dispersed particle surfaces are formed after the layer (I) is cooled from a molten state at a cooling rate of from 10&deg; C. to 20&deg; C. per minute. The dispersed nanoscale nucleating particles are present in layer (I) in an amount of from 10 ppm to 2000 ppm, based on the total weight of layer (I). Also described is a method of using the film of the present invention in packaging foodstuffs.

Tough, dimensionally-stable transparent film having a copolyamide layer containing solid nanoscale filling materials with nucleating effect and its use for packaging foodstuffs

A thermoformable, multilayer, co-extruded adhesive-free and EVOH free film having an outer layer of polyamide and a second outer layer polyolefin, olefin copolymer or a mixture thereof, with inner polyamide and polyolefin or olefin copolymer layers, and layers of coupling polymer.

Multilayered, coextruded, heat-stable deep-drawing foil for packaging

A thermoformable, puncture-resistant multi-layered film with surface slip, prepared by coextrusion and built up from polyolefin-based, polyamide-based and adhesion promoting polymer layers and its use for packaging sharp-edged goods, in particular foodstuffs.

Deep-drawn slidable foil based on polyolefins and polyamide

A thermoformable, multi-layered, symmetric, coextruded film having no tendency to roll up, is described. The coextruded film contains layers of polyamide and polyolefin or copolymers based on olefins.

Symmetrically structured, multi-layered film

A longitudinally stretched multilayered film having good barrier properties is described. The film is prepared by a process comprising (a) preparing by coextrusion a laminate structured of, in sequence, a first polyamide layer, an EVOH layer, and a second polyamide layer, and (b) longitudinally stretching the laminate and (c) applying by vacuum vapor deposition to one of the surfaces of the stretched laminate an inorganic layer.

Longitudinally stretched, vacuum vapor coated packaging films

Described is a heat sealable, multi-layer laminating film composed of at least six layers of thermoplastic polymers. The multi-layer laminating film has an inner layer of ethylene/vinyl alcohol copolymer (EVOH). Also described are packaging materials containing the multi-layer laminating film of the present invention.

Gas-tight laminating film and packaging material produced therefrom

A multi-layered laminate suitable for production of thermoformed packaging is disclosed. The laminate contains a polyamide-containing layer, a sealing layer and optionally an EVOH-containing layer and is characterized in that it contains water in an amount of 0.5 to 2.5 percent.

Flexible, polyamide-containing multi-layer film having an improved thermo-forming capacity due to moistening

The present invention relates to a mixture consisting of

Polyamide mixtures which contain solid particles

The present invention relates to a sealable laminated film which contains a copolymer consisting of ethylene and .alpha.-olefine, wherein the MPE copolymer is characterized as follows:

Growing community of inventors

Bomlitz, Germany

Gregor Kaschel