FILLING PASTE FOR COVERING VENEER DEFECTS AND METHOD OF PRODUCING PLYWOOD USING FILLING PASTE Russian patent published in 2019 - IPC C09D5/34 C08L61/10 C09J161/10 B27D1/04 

FIELD: woodworking industry.

SUBSTANCE: invention relates to woodworking industry and can be used in production of glued laminated materials, particularly veneer. Filling paste for covering veneer defects contains phenol-formaldehyde resin, chalk, flour, water, wherein the paste additionally contains kaolin and mimosa extract, with the following ratio of components, wt%: phenol-formaldehyde liquid resin 70.0–75.0, wheat flour 6.0–10.0, chalk 4.0–6.0, kaolin 10.0–12.0, mimosa extract 1.0–2.0, water balance. Method of producing plywood includes gluing sheets of veneer by hot pressing and covering defects of plywood with filling paste, note here that plywood defect cover is performed by said hot curing filling paste by layer-by-layer filling of veneer sheets defects immediately prior to hot pressing.

EFFECT: production of plywood with application of filling paste to eliminate almost all defects of veneer (wood) and creation of surface for subsequent lamination of the product.

2 cl, 3 tbl