Airex Ag

Martin Gaul

Dietmar Rakutt

Roman Gätzi

Franz Burkard

Michael Wissler

The invention relates to a contoured structural element () for use as a core layer in a curved sandwich composite element, the contoured structural element () being formed from a thermoplastic foam, in particular PET, the contoured structural element () being subdivided, except for a connecting layer (), into a plurality of body elements (), and the body elements () and the connecting layer () being aligned parallel to a base area () of the contoured structural element () which is in a planar state. According to the invention, at least one surface layer () of the connecting layer () and the adjoining surface layer () of the body elements () at least partly have a thermally densified layer (); the body elements (), the connecting layer () and the thermally densified layer () being made of the same material.

Contoured structural element and production of the contoured structural element

A method for producing a hard-foam film, for use as a core layer in sandwich composite elements, having an increased compressive strength along a thickness extension extending perpendicularly to its surface extension, from a foam block () of a thermoplastic, extruded, in particular partially crystalline and/or closed-cell, plastic rigid foam material, PET.

Method and device for producing a hard-foam film

A structural element for use as a core layer in a sandwich composite element, wherein the structural element () is formed from a plurality of mutually welded body segments () made from an extrusion foamed thermoplastic, and wherein the structural element () has a first face side () for bonding to a cover layer, wherein a surface of the first face side () that can be loaded with a resin () has open pores (), wherein the surface of the first face side () is created by hot-element cutting, in such a manner that the surface is thermally sealed to some extent, wherein a gloss value of the surface of the first face side (), measured at 60&#xb0; in accordance with DIN 67530-1982 is between 2 and 10 gloss units.

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Birrhard, Switzerland

Martin Gaul