A method of manufacturing a wood plate material
(57) Abstract:Use: wood processing, in particular for interior surfaces in conditions of high humidity. The inventive method provides for the grinding of filler mixing it with a binder and fire retardant with the subsequent formation of the Mat and hot pressing plates. The filler used crushed shell palm nut next fractional composition wt%: 0.315 - 0.64 mm - 60 - 70,0.65 - 125 mm - 30 - 40, which is mixed with 15 to 25% aqueous solution of urea-formaldehyde resin in the following ratio, wt.%: crushed shell palm nut specified structure 84,8 - 94,5, urea-formaldehyde resin 5-15 retardant 02 - 0,5.
FIELD: wood-working industry; production of pressed building items.
SUBSTANCE: the group of inventions is pertinent to the field of production of pressed building items made out of plant roughage and may be used in wood-working construction industries and other branches of economy. The panel made by pressing out of a carpet without synthetic binding materials consists of a mixture of a birchen bark ground up to a faction of 40-5000 microns and a filler predominantly out of cellulose filaments at the following ratios in respect to the total dry solid matter (in mass %): a birchen bark - 60-95, cellulose filaments - 5-40. In an alternative version of the panel, which is made the same way as the above, the outer surfaces of the carpet are strengthened with lingo-cellulose-polymeric compound including an excelsior and the KF-EC resin with a hardener or an excelsior and triturated secondary polymer taken in amount of 10-12 mass % to the weight of the excelsior. At that the share of the lingo-cellulose-polymeric compound makes 20-40 % to the total dry weight of the carpet. The method allows to use a ground birchen bark without synthetic binding agents for shaping a carpet and its consequent pressing. At that for a carpet formation they use the birchen bark ground up to a faction of 40-5000 microns, and a filler mainly made out of cellulose filaments taken in the following ratio in respect to the total dry weight(in mass %): a birchen bark-60-95, cellulose filaments - 5-40. Before formation of the carpet the filler is moistened up to 18-20 % of absolute humidity and is mixed with ground birchen bark. The carpet is formed with a thickness equal to 200-300 % of the thickness of a finished panel. The group of the inventions ensures simplification of the production process, reduction of its cost, expansion of the range of the List of items.
EFFECT: group of the inventions ensures simplification of the production process, reduction of its cost, expansion of the range of the List of items.
8 cl, 1 tbl
FIELD: production of plate materials of the splint-slab type, applicable in the wood-working and building industries.
SUBSTANCE: the method consists in processing of husk particles by a binder containing urea-formaldehyde resin, ammonium chloride, Aerosil butadienstyrene methacrylic latex, forming of the mat, cold prepressing and hot pressing. The binder instead of ammonium chloride contains ammonium fluosilicate at the following relation of the components, mass percentage: urea-formaldehyde resin - 82.8 to 93.4, ammonium fluosilicate - 0.6 to 1.2; butadienstyrene methacrylic latex - 4.0 to 12.0, Aerosil - 2.0 to 4.0.
EFFECT: enhanced physico-mechanical characteristics of the plates.
FIELD: production of building materials, applicable in the wood-working, furniture and building industries.
SUBSTANCE: the method consists in mixing together of wood particles with urea-formaldehyde resin, butadienstyrene methacrylic latex, ammonium chloride and Aerosil, forming of the mat, cold prepressing and hot pressing. The binder instead of ammonium chloride contains ammonium fluosilicate at the following relation of the components, mass percentage: urea-formaldehyde resin - 82.8 to 93.4, ammonium fluosilicate - 0.6 to 1.2, butadienstyrene methacrylic latex - 4.0 to 12.0, Aerosil - 2.0 to 4.0.
EFFECT: enhanced physico-mechanical and ecological characteristics.
FIELD: wood-working industry, in particular, methods for decreasing the content and emission of formaldehyde intended for fiber boards.
SUBSTANCE: the process of production of fiber boards is conducted with employment of aminated adhesive resins with an addition of substances binding the formaldehyde by compacting in running presses or continuous-action presses and by cooling. After compacting, but before cooling the fiber board is subjected to a short-time curing at 80 to 100C during 6 to 16 hours, depending an the expected level of decrease and emission of formaldehyde and used parameters of the process of production.
EFFECT: reduced content and emission of formaldehyde in the fiber board.
5 cl, 3 dwg, 3 ex
FIELD: wood-working industry, applicable in furniture, building, packaging and machine-building branches of industry.
SUBSTANCE: the method consists in the fact that filings and sawdust composed of: coniferous needles - 80%< filings - 10%, sawdust - 5% and wood fibers - 5% are added to the ground pulp of coniferous needles. The obtained mass is fed to the forming unit, which forms the sheets, which are fed to a press, where they are compacted at a pressure of not more than 10 Mpa at a temperature of not higher than 250C during not longer than 30 S. The obtained coniferous-needle material is cooled down, packed and delivered to the consumers.
EFFECT: produced material with breaking load, high density, low water absorption.
1 dwg, 1 tbl
FIELD: manufacture of substantially flat articles, for instance particle boards and other articles of industrial wood residue or vegetable raw materials by hot pressing thereof.
SUBSTANCE: method for particle board production involves performing hot molding at temperature of 120-200°C and under pressure of 2.5 - 30.0 MPa for panel forming. Industrial waste, molasses, concentrated corn steep or mixture thereof are used as binding material, wherein lime and starch-containing materials are added to mixture including industrial wood residue or vegetable raw materials and the binding material before hot molding operation beginning.
EFFECT: increased ecological safety and increased strength of the panels.
4 cl, 1 tbl, 1 ex
FIELD: production of plate material.
SUBSTANCE: proposed composition is made on base of dispersed raw material with modifying additive; plate material is made by molding the said composition at temperature of 160-190°C and pressure of 65-95 kg/cm2; molding time of 1 min per 1 mm of plate thickness. Used as modifying agent are acid by-products of oxidation of cyclohexane of caprolactam process at mass ratio to wood wastes of 50-70:30-50, respectively.
EFFECT: facilitated procedure of production of composition.
FIELD: wood-working industry.
SUBSTANCE: fiber or chip is dried, then it is mixed with glue at a temperature of below 100C, and a plate is formed at a temperature above 140C, wood is decomposed into solid and liquid components that are used as the glue. The installation for manufacture of the plate has a drying device, device for application of glue onto the fiber or chip, device for compaction, transport facilities for transferring the fiber or chip from the drying device to the device for application of glue, mixer having means for cooling the body. The contents of glue in a plate obtained with the use of the installation makes up 45 to 55 kg per cubic meter of plate.
EFFECT: produced plate with a lower contents of glue as compared with plates produced by the known methods.
31 cl, 2 dwg
FIELD: compositions used for manufacture of plates from wood laminate.
SUBSTANCE: composition for manufacture of plates contains rice shell or rice shell and sawdust mixture used as filler, liquid sodium glass having modulus of 2.4-3.6, and silicon dioxide. Artificial silicon dioxides or siliceous dust-like wastes of various industries may be used as silicon dioxides, with SiO2 content making at least 80%. Composition components are used in predetermined ratio.
EFFECT: improved strength and water tightness, and increased efficiency in utilization of various wastes.
FIELD: wood-working industry, and namely the method of manufacture of the structural unit, in particular, slab of wood fiber, wood chip and/or sawdust, and pressing of fiber, chip, and/or sawdust with applied glue for formation of the structural unit, in particular, slab.
SUBSTANCE: at first the wood fiber, chip and/or sawdust are decomposed by steaming into liquid components and hard components. The liquid components are separated and cooled inside the closed hermetic system up to their discharge from the system. During this process the ecological load caused by odor is sharply reduced. The invention also includes a device for realization of the method and a structural unit manufactured on it.
EFFECT: produced an ecologically pure method for manufacture of slabs and a device for its realization.
46 cl, 3 dwg