Polycarbonate composite material which can be thermoplastically shaped, methods for the production thereof, use of the same and a flame-proof polycarbonate moulded part

The thermoplastically moldable composite polycarbonate material as claimed in at least one of the preceding claims, characterized in that it is composed of 2, 3, 4, or 5 layers.

The thermoplastically moldable composite polycarbonate material as claimed in at least one of the preceding claims, characterized in that the ratio of the thickness of the at least one layer with an LOI value smaller than 29 and the thickness of the at least one layer with an LOI value greater than 29 is in the range from 0.01 and 0.5.

The thermoplastically moldable composite polycarbonate material as claimed in at least one of the preceding claims, characterized in that the ratio of the weight of the at least one layer with an LOI value smaller than 29 and the weight of the at least one layer with an LOI value greater than 29 is in the range from 0.01 to 0.5.

The thermoplastically moldable composite polycarbonate material as claimed in at least one of the preceding claims, characterized in that the at least one polycarbonate layer with an LOI value smaller than 29 has a thickness of from 30 μm to 500 μm.

The thermoplastically moldable composite polycarbonate material as claimed in at least one of the preceding claims, characterized in that the at least one polycarbonate layer with an LOI value greater than 29 has a thickness of from 0.7 mm to 3 mm.

The thermoplastically moldable composite polycarbonate material as claimed in at least one of the preceding claims, characterized in that a polycarbonate layer with an LOI value smaller than 29 is an outer layer of the composite polycarbonate material.

The thermoplastically moldable composite polycarbonate material as claimed in at least one of the preceding claims, characterized in that, between a layer with an LOI value greater than 29 and a layer with an LOI value smaller than 29, it has a third layer, the third layer being a decorative layer.

The thermoplastically moldable composite polycarbonate material as claimed in at least one of the preceding claims, characterized in that when it is subject to vertical flame application to an edge for 60 seconds in accordance with FAR 25.853 (a) (1) (i) it has a burn length smaller than 150 mm, and the afterflame time is shorter than 15 seconds, and the flame time of drippings is smaller than 3 seconds.

The thermoplastically moldable composite polycarbonate material as claimed in at least one of the preceding claims, characterized in that the specific optical density in accordance with FAR 25.853 (c) and AITM 2.0007 does not exceed Dsmax=200 during a test period of four minutes.

A process for producing a thermoplastically moldable composite polycarbonate material as claimed in at least one of the preceding claims, characterized in that

• a) at least one dry mix with an LOI value smaller than 29 and at least one dry mix with an LOI value greater than 29 are extruded, and
• b) the resultant films and, where appropriate, other films are laminated to one another to obtain the thermoplastically moldable composite material.

A process for producing a thermoplastically moldable composite polycarbonate material as claimed in at least one of the preceding claims, characterized in that

• a) the surface of at least one film with an LOI value smaller than 29 is provided with an optical effect, and then
• b) the film provided with the optical effect and with an LOI value smaller than 29 is laminated to a film with an LOI value greater than 29 in such a way that the resulting thermoplastically moldable composite polycarbonate material has at least one decorative layer between a layer with an LOI value smaller than 29 and a layer with an LOI value greater than 29.