Flame resistant composite panel and process for its manufacture

Details Flame resistant composite panel and process for its manufacture Flame resistant composite panel and process for its manufacture

B - Operations, Transporting

32

B

154/123

B32B 5/18 (2006.01) B32B 15/08 (2006.01) E04B 1/94 (2006.01)

Patent

CA 1156135

ABSTRACT OF THE DISCLOSURE The invention relates to a flame resistant composite panel which can be shaped at room temperature with non-chip-for- ming processes and is made of a core of foamed thermoplastic material with metallic cover layers on both sides joined to the core by means of adhesive layers. Composite panels of the above kind which have a plastic core containing e.g. polyolefines suffer from the disadvantage of having unfavourable flammability characteristics which are expressed in DIN 4102 as belonging to the classification of being of normal combustibility. For this reason such compo- site panels find only limited application, and in addition they can not be plastically deformed. The disadvantages associated with such composite panels are avoided by a number of measures such as providing the foamed rigid PVC core with a special surface finish which permits the use of a relatively thin layer of adhesive bet- ween the core and both cover sheets.

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