SYNTHETIC GLUE FOR MANUFACTURE OF PLYWOOD, PLYWOOD, AND METHOD FOR MANUFACTURE THEREOF Russian patent published in 2021 - IPC B27D1/04 

FIELD: wood processing.

SUBSTANCE: group of inventions relates to the wood processing industry, in particular, to manufacture of plywood. The plywood is comprised of veneer sheets glued together with synthetic glue. The method for manufacturing plywood includes processing the veneer surface, applying a layer of glue thereto, forming a stack of veneer, pre-pressing and hot pressing of the stack. The synthetic glue for manufacture of plywood comprises resin, chalk, flour, water and an iron-containing finely dispersed filler, wherein pulverised waste of metallurgical manufacture with an iron content of at least 30.0% is used as a filler, at the following ratio of components, % wt.: resin 65.0 to 78.0; chalk 5.0 to 10.0; flour 5.0 to 8.0; water 8.0 to 14.0; iron-containing finely dispersed filler 0.05 to 6.0.

EFFECT: marking of plywood sheets and the material used as an identification mark for guaranteed subsequent identification thereof is ensured.

8 cl