FIRE-RESISTANT DOOR LEAF Russian patent published in 2019 - IPC E06B5/16 A62C2/06 E04B1/94 

FIELD: construction.

SUBSTANCE: fire-proof door leaf relates to construction, namely to designs of fire-prevention (fire-resistant) wooden doors and other similar protective devices, passively protecting openings in construction fire barriers from open fire and harmful fire factors. Fire-resistant door leaf includes main panel of wood or composite materials based on it, fire-resistant layer and decorative layer. Fire-resistant layer contains fire-resistant coating based on liquid glass and reinforcing element. On the main panel on both sides a layer of elastic fire-resistant adhesive is applied, which contains components of silica and its derivatives, into which the reinforcing element is immersed in the form of a grid from glass fiber. Mesh is attached along perimeter to main panel by connecting elements. Thickness of the layer of the elastic fire-resistant adhesive makes 0.5–0.8 of the thickness of the said mesh. Above mesh used is an improved mesh intended for reinforcement of the base plaster layer in vandalism protection. Layer of fire-resistant coating is made of plastic fire-resistant ceramic-forming plaster and is applied on reinforcing mesh.

EFFECT: wooden fire doors, complete with fire resistant door panels made using the disclosed technical solution, have high fire-resistance, relatively low weight, are manufacturable, do not require additional process equipment and accessories, are inexpensive, reliable and durable in operation.

8 cl, 6 dwg