Non-combustible composite panel and manufacturing method

摘要

The present invention relates to non-combustible composite panels, comprising two outer layers (24) and a core (10, 16). Moreover, the invention provides a method for manufacturing of non-combustible composite panels. The amount of organic ingredients within the core, is reduced insofar as to allow for a heat of combustion adequate to reach non-flammability, while providing sufficient flexibility for the composite panel. Magnesium hydroxide is implemented within the core to obtain extraordinary flame retardation. In order to manufacture the inventive composite panels a continuous press (34) is utilized replacing extruders (14) known by the state of the art.

主权项

1. A composite panel, comprising two outer layers and a core, the core consisting of a mixture of individual materials including:
a first kind of magnesium hydroxide, the first kind of magnesium hydroxide having an average particle size of 0.3 to 1.0 mm; a second kind of magnesium hydroxide, the second kind of magnesium hydroxide having an average particle size of 10 to 100 μm; a third kind of magnesium hydroxide, the third kind of magnesium hydroxide having an average particle size of 1 to 10 μm; 15 to 25% by weight of fillers; 5 to 10% by weight of binders; 0 to 2% by weight of tackifiers; up to 3% by weight of inorganic binders; and up to 1% by weight of stabilisers, wherein the core mixture includes 50 to 65% by weight of the first kind of magnesium hydroxide, 10 to 20% by weight of the second kind of magnesium hydroxide, and no more than 2% by weight of the third kind of magnesium hydroxide, wherein the core mixture further includes up to 15% by weight of aluminum hydroxide, and wherein the second kind of magnesium hydroxide and the third kind of magnesium hydroxide have non-overlapping particle sizes.