FIELD: composite materials.
SUBSTANCE: invention relates to production of composite materials from ground wood stock, e.g. sawdust, and can be used to manufacture environmentally safe slab materials used in construction, furniture industry, and in fabrication of wood fuel briquets. Process according to invention consists in initially preparing composition of wood filler and binder followed by forming mat further subjected to hot compaction. In particular, wood filler is mixed with binder at softening temperature of binder (130-140°C), which binder is a mixture of partially hydrolyzed suberin and suberic acid obtained through hydrolysis of divided birch bark in presence of sodium hydroxide at 85-87°C. Hot compaction of formed mat is effected at 130-140°C and pressure 10-13 MPa (for 20-40% of binder).
EFFECT: improved strength and waterproofness characteristics.
2 cl, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING COMPOSITE MATERIAL FROM BIRCH BARK | 2020 |
|
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| METHOD FOR PRODUCTION OF PLATE MATERIALS BASED ON VEGETABLE RAW MATERIALS AND BIFUNCTIONAL SYNTHETIC BINDERS | 2016 |
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| METHOD OF PROCESSING BIRCH BARK TO OBTAIN BETULIN AND SUBERIC ACIDS | 2011 |
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