Crude mixture for making heat-insulation articles
SUBSTANCE: crude mixture for making heat-insulation articles contains, wt %: wood aggregate ground until passage through sieve N5 77.0-79.0; liquid phenol-formaldehyde resin 7.0-8.0; hydrolysed lignin 5.0-6.0; textile wastes 5.0-6.0; carboxymethyl cellulose 3.0-4.0. Articles are made by hot-pressing the mixture at pressure of 1.3-1.5 MPa and temperature of about 160°C.
EFFECT: obtaining articles with low content of a toxic component - phenol-formaldehyde resin.
The invention relates to the construction materials industry, namely the composition of the raw material mixtures for the manufacture of insulation products used in the construction of walls, floors, partitions.
Famous raw mix for the production of insulation products containing, wt.%: wood filler to 58.9-77,2; phenol-formaldehyde resin 12,7-23,6; lignin 2,9-9,1; waste weaving 7,2-13,2; .
The objective of the invention is the reduction of content in the composition of the raw mix toxic component is a phenol-formaldehyde resin.
Technical result is achieved by the fact that the raw mix for the production of insulation products, including wood filler, phenol-formaldehyde resin, lignin, waste weaving, further comprises carboximetilzellulozu in the following ratio, wt.%: wood filler, crushed to pass through a grid No. 5, 77,0-79,0; phenol-formaldehyde resin 7,0-8,0; lignin 5,0-6,0; waste weaving 5,0-6,0; carboxymethylcellulose 3,0-4,0.
The table below shows the composition of the raw mix.
|Wood filler, crushed to pass through a grid No. 5||77,0||78,0||79,0|
The following is an example for insulating products offered raw mixture.
The components are metered in the desired quantities.
Prepare wood filler (shredded, obtained from waste treatment of pine, spruce), crushed it, and sieved through sieve No. 5. Wood filler and waste weaving (scraps of main and weft threads, scraps of fabric) is mixed. It is received from the mixture previously prepared mixture of the phenol-formaldehyde resin (liquid) and powdered fillers - hydrolytic lignin and carboxymethylcellulose. All components are thoroughly mixed so that the resin impregnated wood filler and a waste of weaving. The mixture is subjected to hot pressing at a pressure of 1.3-1.5 MPa and a temperature of ~160°C. Under the influence of the temperature of the resin cures. Solidified product was incubated for 3-5 days at room temperature.
The source of information
1. SU # 1131856, 1984.
Raw mix for the production of insulation products, including wood filler, phenol-formaldehyde resin, lignin, waste weaving, characterized in that it further comprises carboxymethylcellulose in the following ratio, wt.%: wood filler, crushed to pass through a grid No. 5, 77,0-79,0; phenol-formaldehyde resin 7,0-8,0; lignin 5,0-6,0; waste weaving 5,0-6,0; carboxymethylcellulose 3,0-4,0.
SUBSTANCE: hydrophilic plasticine is a product of comprehensive recycling of concentrated steep water from starch production, having sufficient plastic properties. The hydrophilic plasticine is obtained by heat treatment at 90°C, while simultaneously mixing the mixture of dry sieved moss peat with moisture content of not more than 20% and a thickened corn-steep extract, formed during starch production when corn is soaked in warm water at 45-52°C, which contains up to 0.35% sulphuric acid with respect to SO2 and less than 2% fatty acids and dry substances boiled down to concentration of not less than 48%. Components of the mixture are taken in ratio of 1:(4-6), respectively. If content of fatty acids in the thickened corn-steep extract is higher than 2%, the components are first heated to different temperatures before mixing.
EFFECT: plasticine is plastic and dissolves in water.
SUBSTANCE: wood-polymer composition consists of, wt %: wood-vegetable filler 70-90, thermoplastic polymer binder 8-25, a sodium salt of polyethylene polyaminomethylene phosphonic acid 0.5-1.0 and target additives - the balance. The thermoplastic polymer binder is selected from a group of vinyl polymers based on vinyl chloride or copolymes thereof with vinyl acetate, polymers based on ethylene, propylene, copolymers thereof, polymers based on methyl methacrylate, polyethylene terephthalate, polystyrene or mixture thereof.
EFFECT: invention improves strength properties of the composition, simplifies the composition and method for production thereof.
2 cl, 2 tbl
SUBSTANCE: composite contains 55-75 wt % bagasse fibre with particle size of 40-120 mesh and length to diameter ratio ranging from 3:1 to 5:1 and 25-45 wt % thermoplastic polymer. The bagasse is prepared from a by-product of sugarcane refining. The separated fibres are softened by adding water and grinding. The fibres are then mixed with a thermoplastic polymer and the fibre-polymer mixture is extruded to obtain a composite.
EFFECT: obtaining a high-strength ecologically clean composite which can be used for a long period of time without deformation and colour change.
12 cl, 1 dwg, 1 tbl, 7 ex
SUBSTANCE: invention relates to olefin-containing compositions for producing wood materials and crude wood materials, use of olefins to endow crude wood materials with hydrophobicity and a method of producing wood materials from crude wood materials. The composition contains crude wood materials from lignocellulose in form of fibres, chips or shavings, as well as olefins or a wax composition. The wax composition contains olefins and additionally paraffin wax in form of long-chain saturated hydrocarbons. The olefins contain an average of 24-50 carbon atoms; more than 50 mol % are alpha-olefins; have a maximum of carbon chain length distribution between 24 and 40 carbon atoms. Bringing crude wood materials (shavings, chips, fibres) into contact with said olefins and optionally together with paraffin wax provides hydrophobisation thereof. Binder is added to said composition to obtain fibreboards, wood chipboards and oriented strand boards.
EFFECT: invention enables to obtain end products with good hydrophobic properties.
23 cl, 2 tbl, 2 ex
FIELD: wood working industry.
SUBSTANCE: wood and polymer composition contains a wood filler and thermoplastic wastes. The wood filler is bark of conifers exposed to serial extractive treatment with water or aqueous solution of sodium hydroxide or isopropyl alcohol. The thermoplastic wastes are wastes of polystyrene or polyvinyl chloride.
EFFECT: invention makes it possible to improve physical and mechanical indices of a wood polymer composition, to expand raw resources for manufacturing of this composition and to reduce its prime cost.
1 dwg, 2 tbl
FIELD: process engineering.
SUBSTANCE: invention relates to production of construction materials, particularly, to fabrication of compacted wood biological composite materials. Proposed method comprises making biological composite material including biological binder and saw dust. Produced material is dried to make a mat by cold compaction and subjected to hot forming. Saw dust is mixed with biological binder based on culture broth obtained in cultivation of Leuconostoc mesenteroides bacterium on nutrient medium. Said medium consists of the mix of molasses, wastes of sugar production, and lactoserum taken in the ratio of 2:2:1 at temperature 24-26°C for 72-96 hours in static conditions with addition of liquid glass in concentration of 2.5 wt %.
EFFECT: moisture-resistant nonpolluting materials without phenol compounds.
SUBSTANCE: invention relates to a biodegradable thermoplastic composition for producing materials and articles which are biodegradable in natural conditions. The biodegradable thermoplastic composition contains lignocellulose filler, a binding agent and polyethylene as a polymer base. The binding agent is a copolymer of ethylene and vinyl acetate. The lignocellulose filler used is in form of cheap manufacturing wastes with no food and feed value and natural materials selected from flax shive, sunflower husks, sodium lignosulphonate, leaves and straw.
EFFECT: composition is characterised by high biodegradability and meets requirements for materials for processing using conventional processes and equipment.
5 cl, 3 tbl, 1 dwg
SUBSTANCE: invention relates to a method of producing wood materials from lignocellulose-based grinding products, with low emission of volatile organic compounds and aldehydes. The lignocellulose-based grinding products and an adhesive based on amino plastic, diisocyanates, polyurethanes and/or tannin-formaldehydes or mixtures thereof are prepared. The lignocellulose-based grinding products are mixed with the adhesive and the mixture is pressed during heat treatment. Before pressing and after splitting into fibres or processing into chips, a combination is added to the grinding products, said combination comprising at least one component having buffer capacity, selected from a hydrosulphite salt or sulphite salt. At least one component is optionally added, said component being selected from urea, a urea derivative or hydroxides of alkali, alkali-earth metals or ammonia.
EFFECT: wood material obtained using the method have low emission of volatile organic compounds and aldehydes, particularly formaldehyde, during synthesis thereof and during prolonged use thereof.
5 tbl, 3 ex
SUBSTANCE: method involves preparation of a polymer composition based on PVC, an impact strength modifier, a heat stabiliser, a binding agent and addition of modified wood flour. The wood flour is obtained by pre-saturating wood flour with aqueous solutions of binding agents of silica sol or carbon nanotubes, stirring the obtained mixture and drying.
EFFECT: wood-polymer materials based on the obtained highly filled rigid polyvinyl chloride composition have high tensile strength and thermal stability, low viscosity, flammability and water absorption.
FIELD: process engineering.
SUBSTANCE: invention relates to production of wood-filled composite materials based on timber wastes and mineral binders. Proposed method comprises mixing wood filler with binder. Filler is treated in tight chamber in atmosphere of flue gases at 190-200°C for 50-60 minutes. Then, prior to mixing, filler is processed in plasma-forming gas flow in discharge chamber at high-frequency generator power of 200-600 W and vacuum of 100-130 Pa for 250-280 s. Air is used as said plasma-forming gas fed at flow rate of 0.08-0.12 g/s. After mixing of filler and binder, molding and heat treatment are performed.
EFFECT: higher strength.
1 tbl, 2 ex
SUBSTANCE: invention relates to industry of construction materials, in particular to manufacturing products (plates) from wood-cement compositions, mainly used in rural construction. Arbolit mixture contains (wt %): Portland cement 47-52; crushed wood 22-31.5; quartz sand 20-25; 3% hydrogen peroxide solution 1-1.5, with water-cement ratio constituting 1.1-1.3.
EFFECT: increased frost resistance of arbolit.
SUBSTANCE: invention relates to industry of building materials, in particular, to manufacturing products (plates) from wood-cement compositions, used, mainly, in rural construction. Arbolit mixture contains, wt %: Portland cement 53-60; crushed wood 23-27; ethylhydrosiloxane liquid 13641 5-7; quartz sand 10-1-5, with water-cement ratio 0.9-1.1.
EFFECT: increased frost resistance of arbolit.
SUBSTANCE: invention relates to field of manufacturing wall building materials. Raw material mixture for brick manufacturing includes, wt %: wood sawdust 52.8-59.7; quartz sand 15.0-20.0; Portland cement 25.0-27.0; sodium methylsiliconate 0.05-0.1; fibrous wastes of spinning or weaving industry 0.1-0.25; with water-cement ratio 0.6-0.65.
EFFECT: increased strength.
SUBSTANCE: wood concrete mixture contains, wt %: Portland cement 24-26; shredded wood 69.3-69.8; gypsum 1-1.5; grade 6 asbestos 3-5; carboxymethylcellulose 0.1-0.2, with water-cement ratio 0.5-0.6.
EFFECT: reduction of cement consumption in wood concrete composition.
SUBSTANCE: wood concrete mixture contains, wt %: Portland cement 24-26; shredded wood 69.5-71; gypsum 1-1.5; casein glue 2.5-3; urea 0.5-1, with water-cement ratio 0.5-0.6.
EFFECT: reduction of cement consumption.
SUBSTANCE: raw material for production of wooden building material contains, wt %: milled wood 20-24; quicklime 12-16; calcium chloride 3-4; marble powder 36-41; water 20-24.
EFFECT: increased strength of building material, obtained from raw material mixture.
SUBSTANCE: invention relates to construction, particularly to a method of producing heat insulating material based on wood processing wastes. The method of producing heat insulating material involves mixing solution-pretreated wood aggregate, portland cement, an additive and water, followed by moulding and hardening. The wood aggregate used is industrial chips. The solution used to treat the aggregate is 30% sodium glass solution in amount of 10% of the weight of the wood aggregate. The portland cement used is based on portland cement clinker with ultimate strength of 40 MPa, which is premixed with the additive which is in form of powdered calcium chloride with weight content of calcium chloride of at least 90% and in amount of 2% of the weight of portland cement. After mixing said components with water, the mixture is further mixed with process foam from an aqueous solution of 1% protein hydrolysate, with the following ratio of components, wt %: industrial chips - 38-40, said sodium glass solution - 3.8-4.0, portland cement - 39-42, calcium chloride - 0.3-0.36, said process foam - 0.8-0.85, water - the balance. The material is moulded in a press mould at pressure of 0.1÷0.35 MPa, followed by hardening at temperature of 50÷60°C and relative air humidity of 70÷80%. After hardening, a cladding is deposited, the cladding consisting of a polyol and a polyisocyanate, with the following ratio of components, wt %: polyol - 55, polyisocyanate - 45.
EFFECT: low density of the material and improved heat insulation properties thereof.
1 dwg, 1 tbl
SUBSTANCE: composition for production of loose heat insulation materials includes wastes of woodworking industry - wood chips, treated with a copper mixture, slaked lime and building gypsum at the following ratio of components (vol. %): Wood chips - 49-68, slaked lime - 20-30, building gypsum - 10-20, copper mixture - 1-2.
EFFECT: increased heat insulating properties, low caking capacity, simplified composition, expansion of a raw materials base and low cost of a heat insulation material.
SUBSTANCE: invention relates to the industry of construction materials, particularly to making articles (boards, blocks) from wood-cement compositions primarily used in farm building. The wood concrete mixture contains the following, wt %: portland cement 39-43; hogged chips 50.1-54.7; gypsum 1-3; superplasticiser S-3 0.9-1.3; sodium ethyl siliconate or sodium methyl siliconate 3-4, wherein the water-to-cement ratio is equal to 0.45-0.5.
EFFECT: high frost resistance of articles.
SUBSTANCE: invention relates to the industry of building materials, particularly to making articles (boards) from wood-cement compositions primarily used in farm building. The wood concrete mixture contains the following, pts. wt: portland cement 33-35; hogged chips 28-33; gypsum 1-1.5; superplasticiser S-3 1-1.5; capron fibre 1-1.5, the water-to-cement ratio being equal to 0.7-0.9.
EFFECT: reduced consumption of binder in the wood concrete mixture.
FIELD: building materials industry.
SUBSTANCE: the invention is pertaining to building materials industry, in particular, to preparation of the raw stocks mixtures for production fibrocement items. The raw stock mixtures for production fibrocement items include a cement binding, mineral fillers, cellulose fibers, an additive in amount of 0.1...0.5 % by dry substance from weight of solid ingredients of a raw stock mixture and water. In the capacity of an additive it contains a water dispersion of ethylhydroxyethyl cellulose, the sodium salt of a fatty acid and polyoxyethyleneglycol ether of aliphatic alcohol at their ratio (in mass) equal to 1:0.1:0.15. The technical effect - increase of solidity, including impact solidity and frost resistances of the fibrocement.
EFFECT: the invention ensures increased solidity, including impact solidity and frost resistances of the fibrocement.
1 tbl, 1 ex