COMBINED PLATE FOR FIRE DOORS AND METHOD OF ITS MANUFACTURING Russian patent published in 2009 - IPC B32B27/38 B32B27/40 B32B5/22 B32B5/28 B32B13/02 C04B41/48 E06B5/16 

FIELD: fire safety.

SUBSTANCE: method of combined plate manufacturing is that the fire layer A, which is a fiber-reinforced hydrous sodium silicate, causing a mixture of epoxy resin and hardener or polyurethane resin to form a protective layer B. Before curing the protective layer B in the substrate it is applied a layer C from wood stoves or wood particle board of medium or high density. Before or after coating of protective layer B and the substrate layer C, fire-prevention layer A is covered with protective layer B. Then combination plate is cured by pressing. The resulting combination plate contains a sequence of layers B'-A-B-C, and consists of fire-prevention layer A from an aqueous fiber reinforced sodium silicate with a substrate layer C of wood or particle board of medium-high density, protective layers of B and B', inflicted with both sides to fire-prevention layer A consisting of epoxy or polyurethane resin. Protective layers B and B' are used as an adhesive layer between the fire-prevention layer A and a substrate layer C. In addition, a combination plate can contain a substrate layer C. The combination plate contains a sequence of layers of C-B'-A-B-C.

EFFECT: reduction in price of combined plate manufacturing with out money-losing bonding by special adhesives.

5 cl, 3 ex