Alusuisse-lonza Services Ltd.

Swiss Aluminium Ltd.

Reinhard Schlatter

Rainer Ehrat

Urs Gabi

Paul Kubler

Otto Hodl

Peter Muller

Arnold Grass

The invention relates to a process for protecting sensitive surfaces from mechanical and physical effects, in particular the effects of pressure and/or heat, whereby the surfaces are covered by a protective layer during the application of pressure and/or heat. The protective layer is a thermoplastic or elastic plastic that is molten, plastic or elastic under the conditions of applied pressure and/or heat, and has a lower resistance to deformation than the surface to be protected.

Process for the manufacture of multi-layer composites with sensitive

A flame resistant to nonflammable composite panel (86) is produced from a nonextrudable core mixture (24) with a pourable, nonflammable filling material and a binder, and on both sides cover strips flexibly bonded to the core. For a continuous production of the composite panel (86) in one operation, the core mixture (24) is poured onto an inrunning lower cover strip (48), in contact with a lower adhesive film (16) facing the core mixture (24), and a pile is formed there, extending over the entire width of the adhesive film, both [lacuna] continuously and uniformly drawn through a V gap (40) and compacted there for the first time and calibrated to thickness, an upper adhesive film (30), upwardly limiting the precompacted core mixture (24'), is fed in and brought into contact with a continuously fed cover strip (46) and the sandwich is pressed with further compaction, heated, cooled and cut to the final length of the composite panel (86). The apparatus for carrying out the process preferably comprises a double-belt press (43 ) for the concluding pressing and heating, for maintaining the temperature and for cooling.

Apparatus for the production of a flame resistant to nonflammable

A flame resistant to nonflammable composite panel is produced from a nonextrudable core mixture with a pourable, nonflammable filling material and a binder, and on both sides cover strips, flexibly bonded to the core. For a continuous production of the composite panel in one operation, the core mixture is poured onto a flexible lower adhesive film, supported as it runs in, and a pile extending over the entire width forms there. Between the lower adhesive film and a flexible upper adhesive film, likewise supported as it runs in, material of the core mixture is continuously and uniformly drawn through a V gap and compacted there for the first time and calibrated to thickness. The adhesive films containing the precompacted core mixture are adhesively bonded to the continuously fed cover strips. The apparatus comprises a stretching roller for each of the adhesive films, a device for the uniform application of the core mixture, first means for forming a settable running-in angle and the V gap, second means for supporting the lower adhesive film and third means for the concluding pressing and heating, as well as a device for cutting to length.

Flame resistant to nonflammable composite panel

Process for forming a flame resistant to nonflammable composite panel

A flame resistant to nonflammable composite panel is produced from a nonextrudable core mixture with a pourable, nonflammable filling material and a binder, and on both sides cover strips flexibly bonded to the core. For a continuous production of the composite panel in one operation, the core mixture is poured onto an inrunning lower cover strip, in contact with a lower adhesive film facing the core mixture, and a pile is formed there, extending over the entire width of the adhesive film, both continuously and uniformly drawn through a V gap and compacted there for the first time and calibrated to thickness, an upper adhesive film, upwardly limiting the precompacted core mixture, is fed in and brought into contact with a continuously fed cover strip and the sandwich is pressed with further compaction, heated, cooled and cut to the final length of the composite panel. The apparatus for carrying out the process preferably comprises a double-belt press for the concluding pressing and heating, for maintaining the temperature and for cooling.

Process for the production of a flame resistant to nonflammable

The present invention concerns a composite panel with two cover sheets and between these a core made from a mixture of a granular filler material and a binding agent. The resultant panel meets the requirements governing incombustible building components in various countries, and can therefore be put in the class of incombustible building components. The core material used in known composite panels can be inorganic and incombustible, but all such composite panels known to date suffer from severe disadvantages. To avoid these disadvantages 100 parts by weight of the core material of the panel contains: 85-95 wt % of granular filler material which has an average particle size of over 100 .mu.m and at least 50 wt % Al(OH).sub.3 and 5-15 wt % of a binding agent.

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Schaffhausen, Switzerland

Reinhard Schlatter