Laminated plastic material

摘要

A laminated plastic material comprises surface layers of paper impregnated with amino formaldehyde resin and inner layers of paper containing a flame retardant material and impregnated with phenol formaldehyde resin. The flame retardant material is a product of interaction of an aluminum or copper compound with phosphoric acid and nitrogen bases and contains, in weight percent: -P2O5 total 37 to 63 -P2O5 water-soluble 0 to 6 -NH3 3.5 to 11 -MO 18 to 43 - where MO is at least one metallic oxide, the flame retardant material content ranging from 4 to 8 weight percent, with the following ratio of the laminated plastic components, in weight percent: -paper for surface layers 9 to 26 -paper for inner layers 26 to 49 -phenol-formaldehyde resin 16 to 30 -amino-formaldehyde resin 5 to 26 -