Paper-making and production of cellulose (D21)

D   Textiles; paper(37723)
D21            Paper-making; production of cellulose(8092)
Composition for manufacturing heat-sensitive paper // 2642801
FIELD: chemistry.SUBSTANCE: composition for manufacturing heat-sensitive paper contains a fibrous mixture of 60-80 wt % of cellulose and 20-40 wt % of a chemical-thermomechanical mass obtained by grinding the hardwood chips in two stages. Chemical processing of wood chips before the first stage of grinding is carried out in the presence of deresinator containing anionic, nonionic, cationic, and amphoteric surfactants and isopropyl alcohol with 0.10-0.15 wt % of the absolutely dry wood chips. Before the second stage of grinding, a chemical treatment is carried out in the presence of a deresinator containing anionic, nonionic, and amphoteric surfactants, as well as salts from the group consisting of phosphates, carbonates, silicates, and chelates at a rate of 0.05-0.09% of the absolutely dry wood chips.EFFECT: replacement of a part of expensive cellulose with a modified bleached chemico-thermomechanical mass from hardwood is provided without loss of mechanical strength of paper.2 cl, 1 tbl, 5 ex

ethod and system for lignin processing // 2642787
FIELD: chemistry.SUBSTANCE: method of separating lignin from lignin-containing medium, such as liquid made in the method of processing biomass, for example, from a black alkaline solution produced in the enterprise of recycling of pulp, and processing the separated lignin, includes: the precipitation of lignin from lignin-containing liquid medium, followed by exposure of lignin hydrothermal carbonization in the wet state and the removal of carbonaceous material derived from lignin as a result of the carbonization after the implementation of the hydrothermal carbonization, the method further includes: the regulation of the particle size of the carbonaceous material by bringing the pH value of lignin in the wet state before the hydrothermal carbonization to a value exceeding 7, preferably exceeding 8. The system, a carbon-containing product and the application of the product are also declared.EFFECT: obtaining a hydrocarbon product with a controlled particle size and increasing the profitability of the process.17 cl, 2 dwg
Chemical method of pulp cooking // 2642417
FIELD: chemistry.SUBSTANCE: caustic soda is substituted with cheap lime and complexing, flocculation and acid-base neutralisation of aluminium sulphate are additionally used, the useful ingredients contained in black liquor are reused, output close to the yield of pulp is achieved, high-quality pulp is produced, cyclical utilisation of black liquor is carried out, and the problem of its pollution is solved.EFFECT: highly effective pulp production.10 cl
ethod of manufacturing products from papier-mache // 2641484
FIELD: human vital needs satisfaction.SUBSTANCE: paper material is wound on the blank corresponding to the shape of the product, layer by layer coated with the adhesive, pressed, dried, the preform is impregnated with a vegetable oil, dried, cut into pieces corresponding to the dimensions of the product, and the product surface is handled. New features are layer-by-layer gluing the paper material, carried out with flour paste made from wheat flour with a mass fraction of wet gluten of not less than 28% and water in the ratio of 1:3.5. Sides of the wound paper material glued on the blank of a rectangular cross section is subjected to compression under a pressure of 490*104 PA for 10-15 min, and before drying the preform with a moisture content of 65-70% is removed from the blanks, impregnated at a temperature of 75-80C for 90-130 min with linseed oil with the addition of up to 3% by volume isopropyl alcohol with the further drying of the preform by heating to constant weight, in the mode - 6 days not less than 60C with a subsequent increase in temperature by 10C, bringing the temperature up to 110C.EFFECT: shortening the duration of the technological process by accelerating the impregnation of the preform while maintaining the shape while increasing the strength of papier-mache products.2 tbl

ethod of producing polymer film with discrete luminescent dyeing for paper anti-falsification tools // 2641138
FIELD: chemistry.SUBSTANCE: method of producing a polymer film with discrete luminescent dyeing for paper anti-falsification tools includes the steps of dyeing the polymer film material with fluorescent dyes. Hydrophilized polypropylene microporous membranes obtained by dry stretching are used as a polymeric film material. The film material is discreetly dyed with ink jet printing with aqueous fluorescent ink and laminated on both sides with thermally activated films at a temperature of 135C.EFFECT: improved method of producing polymer film materials for paper security, which eliminates the contact of paper pulp with a phosphor, provides high quality discrete dyeing and an increase in the life of protective tools.1 dwg, 1 ex
Fluff pulp and core with high sap content // 2641136
FIELD: chemistry.SUBSTANCE: fluff pulp in the form of a core comprises 5-25 wt % of hardwood fibres and one or more superabsorbent polymers (SAP). The fluff pulp has a SAP retention of more than 75 wt %. Fluff pulp is used in an absorbent product, a paper product, a subject of personal hygiene, a medical product, an insulating product, a construction product, a structural material, cement, a food product, a veterinary product, a packaging product, a diaper, a tampon, a sanitary napkin, gauze, bandage, a fire-resistant material, or their combination.EFFECT: increasing the content of superabsorbent polymers, reducing the thickness and increasing the softness of the core.14 cl, 6 dwg, 4 tbl, 2 ex

Coating compositions for building materials and substrates of building materials with coating // 2640544
FIELD: chemistry.SUBSTANCE: coating composition adapted to selectively retain water vapour as a function of humidity when cured to form a barrier layer, comprises a hydrophobic component comprising a styrene-butadiene latex having a carboxylation of 0 to 20%; a hydrophilic component comprising a polymer selected from polyvinyl alcohol and sodium polyacrylate and a hydrophilic filler selected from kaolin clay; the coating composition after curing is effective to provide variable water vapour permeability of 1 perm or less at an average relative humidity of RH of 25% and about 15 Perm or more at an average relative humidity of 95% as measured by ASTM E96 at 21C, and tested by applying and curing the composition on craft paper. The invention also relates to an article capable of selectively retaining water vapour, depending on humidity, comprising a substrate of a building material and a barrier layer applied to a substrate of a building material obtained by curing the above coating composition. The coated article is designed in such a way that it can exhibit a certain permeability profile such as, for example, a variable value of water vapour permeability of about 1 Perm or less at an average relative humidity of RH of 25% and about 15 Perm or more at an average relative humidity of 95 %, measured according to ASTM E96 at 21C.EFFECT: improvement of characteristics.13 cl, 3 dwg, 2 tbl
Industrial tissue comprising extruded mesh and method of its production // 2639984
FIELD: textile, paper.SUBSTANCE: structure is represented by a two-component extruded elastomeric mesh material or a mesh.EFFECT: high degree of compressibility under a load applied perpendicularly, and excellent elastic recovery after load removal.73 cl, 10 dwg
ethod of manufacture of paper with transparent sites and paper with transparent sites, manufactured by this method // 2639809
FIELD: textile, paper.SUBSTANCE: method of manufacture of paper with transparent sites of the specified form includes grinding fibrous raw materials based on cotton, preparing a suspension for sheet formation, introduction of a filler, dye and other additives to the suspension, paper web formation, applying the composition to the local sites of the paper to increase transparency and its curing. As a filler, aluminium silicate is introduced into the suspension, characterized by an average particle size of not more than 7 mcm, whiteness of at least 95%. As a colorant, a dark dye is added in an amount of not more than 0.001 by wt % of the weight of absolutely dry fiber to the colour coordinate L* not less than 90.EFFECT: increased protection against falsification.2 cl, 10 ex

Protective element for polygraphic products and fraud-proof polygraphic product // 2639807
FIELD: physics.SUBSTANCE: protective element is proposed comprising luminescent regions forming latent colour images visible when irradiated by exciting radiation of UV-band, made with inks containing nanocrystalline materials based on quantum dots. One part of the image is characterized by the spectral composition of the radiation consisting of one narrow-band line, and the other part of the image is characterized by the spectral composition of the radiation consisting of at least two narrow-band lines. The luminescent colours of the mentioned images are identical when viewed with the naked eye, but are different when viewed through the narrow band colour filters that ensure the selection of the spectral composition of the luminescent radiation. The stated task is also solved by the polygraphic product which comprises a protective element characterized above.EFFECT: creation of a reliable protective element, the authenticity of which can be verified visually with the help of simple technical means.5 cl, 2 dwg

Barrier for mineral oil // 2639776
FIELD: chemistry.SUBSTANCE: invention relates to the use of a liquid composition as a barrier layer for packaging materials. The liquid composition comprises at least one terephthalate ionomer and at least one calcium carbonate containing a filler. Terephthalate ionomer contains anionic substituents selected from the sulfonate groups having an acid number of at least 1 mg KOH/g of ionomer.EFFECT: improved properties.9 cl, 5 tbl, 1 dwg, 5 ex
Drying section, way of drying web from fibre material and machine with drying section // 2639108
FIELD: heating system.SUBSTANCE: druing unit has, at least, one nozzle for supplying the drying fluid to the web in such a way that the drying fluid with the excited vibrations is directed to the web, at least, one outlet device for moist air obtained during the convection drying, and a conveying means for moving the web relative to the drying unit. The drying unit has, at least, one ultrasonic generator that is located in the region of the nozzle to create oscillations of the drying fluid so that ultrasound can help to reduce the moisture content over the entire width of the web.EFFECT: reduction of the moisture content in the web by means of convection drying.16 cl, 7 dwg

Valuable document protected from forgery and method of determining its authenticity // 2638848
FIELD: physics.SUBSTANCE: valuable document contains an identification mark based on the elements made of an amorphous ferromagnetic alloy. The elements are segments of microwires connected to each other, having the ability to emit electromagnetic pulses with a jump-like magnetization reversal under the influence of an external sinusoidal magnetic field. The intensity of the exciting magnetic field is chosen to be from 0.1 to 1000 A/m, and the frequency of this field is in the range of 0.1 to 100 KHz. The pulses emitted at the field magnetization have the options characteristic for the protective label of number: the number of pulses, the ratio of their intensities and phases measured relative to the zero-phase referred to the magnetic field, with the formation of a given code.EFFECT: invention provides a high degree of protection of documents and reliability of determining their authenticity.12 cl, 4 ex, 2 dwg

Technical fabric and welding method of seam area, using ultrasonic welding // 2638516
FIELD: textile, paper.SUBSTANCE: invention relates to the methods of technical fabrics seam area ultrasonic welding, using the textured sonotrode and/or a support. The fabric edges are overlapped, like woven, or one or both of the edges may have several loose warp or weft threads. The method includes connecting of fabric overlapped edges by means of ultrasound, thickness reduction of two edges placed one above each other up to the cloth thickness of the fabric itself.EFFECT: connected area can be perforated, using the laser or other mechanical means to create the seam, having the same woven texture and permeability as the fabric cloth.50 cl, 33 dwg

Cellulosic material with impregnation and application of this cellulosic material // 2637554
FIELD: textile, paper.SUBSTANCE: impregnation of cellulose fibres consists of polyethylenimine. The electrical conductivity of the cellulosic material corresponds to the electrical conductivity of the transformer oil by magnitude order. The electrical conductivity of the cellulosic material is controlled by the choice of polyethyleneimine concentration.EFFECT: improved resistance to breakdown of transformer insulation.7 cl, 4 dwg
arking additive // 2637334
FIELD: physics.SUBSTANCE: marking additive in the form of spherical particles contains a magnetic component and a marking component with the following ratio, wt %: magnetic component 2-98; marking component 2-98. The magnetic component comprises, at least, one component selected from the group consisting of ferrimagnetic iron oxides and/or ferrites with a spinel or garnet structure or particles of metallic Ni. The marking component contains a mixture of salts in the form of nitrates, acetates, chlorides, formates, or oxides, including solid solutions based thereon. The marking component comprises, at least, two elements selected from the group consisting of alkaline earth elements, lanthanides, transition metals, and post-transition metals.EFFECT: increasing the accuracy and reducing the analysis duration of objects containing a marking additive.12 cl, 3 tbl, 4 ex

ethod for producing stabilized amorphous calcium carbonate // 2637019
FIELD: chemistry.SUBSTANCE: method for producing amorphous calcium carbonate (ACC) comprises combining an aqueous solution containing a soluble calcium salt and the first stabilizing agent with an aqueous solution containing a soluble carbonate to form an ACC suspension. Further, a water miscible organic solvent and a solution containing the second stabilizing agent are added simultaneously or sequentially in any order. The second stabilizing agent and the organic solvent are brought into contact with the ACC suspension within about 2 minutes after its formation to produce a stabilized ACC suspension. The first and the second stabilizing agents are the same or different. The total amount of the stabilizing agent is up to about 12 wt % of the stabilized ACC suspension weight. The organic solvent miscible with water is, at least, 5 wt % of the stabilized ACC suspension weight.EFFECT: invention allows to increase the stability of amorphous calcium carbonate, which is in the form of a suspension in the aqueous phase or in the form of a powder.25 cl, 4 dwg, 6 ex

ethod and device for processing liquid flows on pulp mill // 2636560
FIELD: technological processes.SUBSTANCE: method of processing liquid flows on a pulp mill, wherein the device includes a wood preparation unit, an unbleached pulp production unit in which the cooking, washing, sorting and oxygen delignification stages are carried out to produce cellulose pulp, a bleaching unit for bleaching the resulting cellulose pulp, a chemical recovery unit, a pulp-drying machine, a recovery boiler generating boiler blowdown water, an evaporating unit generating condensate, a sewage treatment plant and a water treatment plant. The method includes directing water from at least one of the following sources: alkali filtrate of EOP-bleach filtrate (alkaline extraction using oxygen and peroxide) from the bleaching unit, water from the second settler of the sewage treatment plant, to at least one of the following stages: the preparation of wood in the wood preparation unit, as water for irrigation of the gravitation table of the sewage treatment plant.EFFECT: improvement of the method.12 cl, 2 dwg

Continuous method of manufacturing pulp from herbaceous plant material // 2636556
FIELD: chemistry.SUBSTANCE: method consists of the following stages: preparation of an herbaceous plant material by grinding, dust removal, continuous cooking, dispersion, dilution of pulp, sorting and fractionation, removal of black liquor concentration, dilution of fresh water, getting the finished pulp suitable for the manufacture of paper or sheets of cellulose, and, optionally, bleaching paper pulp. Continuous cooking takes place in a vertical column at a temperature of 70-100C for 40 minutes to 2 hours; as a result, a cooking suspension of the following composition is formed (on average): a weight percentage of NaOH 0.9-1.5; a weight percentage of NaCl or Na2SO3 0.15-0.4, and a weight percentage of herbaceous plant materials 15-18; where the concentration of ingredients is calculated from the weight of the liquid phase. The preferred herbaceous material for this method is miscanthus (Miscanthus x giganteus, Andersson).EFFECT: after sorting and fractionation, two fractions are formed, one of which then passes the grinding process, and the other is processed into finished pulp with or without bleaching.9 cl, 1 tbl, 2 dwg

Cigarette paper with lamellar filler // 2636555
FIELD: tobacco industry.SUBSTANCE: invention relates to cigarette paper containing cellulosic fibers and filler particles, at least 20%, preferably at least 40%, particularly preferably at least 55%, and in particular at least 70% of the filler particles, based on the particle weight or number, have the lamellar shape, the lamellar filler particles having a length "l", a width "b" and a thickness "d", which in each case correspond to the maximum dimensions in three spatial directions perpendicular to each other, both the length "l" and the width "b" being at least twice as large, preferably at least four times as large, as the thickness "d", and wherein the mass-median value d50 of the particle size distribution as measured according to ISO 13317-3 is between 0.2 and 4.0 mcm, preferably between 0.5 and 3.0 mcm, the lamellar particles being formed by calcium carbonate.EFFECT: providing diffusion capacity for air permeability of cigarette paper to reduce CO consumption by a smoker without affecting the cigarette flavour.9 cl, 1 dwg

Production of peroxides and composition using enzyme containing perhydrological activity // 2636466
FIELD: biotechnology.SUBSTANCE: method for peroxycarboxylic acid production comprises reacting carboxylic acid esters and inorganic peroxide in the presence of a polypeptide having perhydrolytic activity and having the amino acid sequence of SEQ ID NO:12, provided that the amino acid residue linked to the C-terminal portion of the catalytic histidine, is not glutamic acid. Also, the said polypeptide is used to create a system for formation and delivery of peroxycarboxylic acid, composition having antimicrobial activity, compositions for care of clothes and personal care products.EFFECT: improved perhydrolytic activity.16 cl, 2 dwg, 12 tbl, 18 ex

ethod for producing black liquor and method for producing liquid flavouring component // 2636363
FIELD: tobacco industry.SUBSTANCE: method for producing a black liquor includes brewing a tobacco feedstock in an alkaline medium; separating the produced brewing product into a black liquor and a tobacco fiber to obtain a black liquor, which includes a flavouring component suitable for use in a tobacco product; and neutralizing the produced brewing product after the brewing step or black liquor after the separation step.EFFECT: reduction of the number of technological processes without deterioration of the tobacco taste.19 cl, 12 dwg, 4 tbl

Use of surfactants for pulp processing and improvement of craft pulp introduction in fibre for obtaining viscoose and other secondary fibre products // 2636306
FIELD: chemistry.SUBSTANCE: craft pulp fibre from bleached softwood processed with the surfactant is considered, that is used as a starting material, to obtain the derivatives of cellulose including simple cellulose ether, cellulose esters and viscose. Methods for obtaining fibre from craft pulp and products made from it are also contemplated.EFFECT: improved properties.23 cl, 5 dwg

Refiner plate with gradually changing geometry // 2636165
FIELD: machine engineering.SUBSTANCE: pattern for segment or sector of the refiner plate with outer radius on outer periphery and inner radius on inner arc contains a grinding zone including a pattern of knives and grooves arranged between the outer periphery and inner arc in a set of strips, and transition zone passing along a line having substantially a spiral shape. In this case, the patterns of the knives in each strip have density which becomes larger in each strip from the zone nearest to the inner arc, in the zone nearest to the outer periphery, wherein the zone of transition is located at an angle to the passing through the segment of the radial line, which values are in the range between 20 and 85. The segments of the refiner plate have the grinding zone with pattern of knives and grooves and a transition zone. In one embodiment of the segments, the transition zone is made continuous in the form of letter X forming diamond-shaped forms.EFFECT: segments of the refiner plate with knives and grooves made according to said pattern, elimination of accumulation of fibers, improvement of quality at optimal power consumption.21 cl, 8 dwg

Cellulose fiber web, containing active agent, and method for web manufacture from cellulose fiber containing active agent // 2636083
FIELD: textile, paper.SUBSTANCE: web has two sides and contains an additional composition located on at least one side of the web. The additional composition comprises at least one film-forming agent and at least one active agent. The film-forming agent is fixed to the web, and the active agent is retained on the web by the film-forming agent. The active agent is an antimicrobial agent.EFFECT: web showing antibacterial activity without releasing the active agent is provided.21 cl, 9 dwg, 5 tbl, 2 ex

Regeneration boiler plant of pulp mill // 2635969
FIELD: machine engineering.SUBSTANCE: regeneration boiler plant of the pulp mill has a tap hole zone melt and contains tap holes connected to the lower part of the boiler to discharge melt from the boiler into a tank-solvent, and a working zone in front of the tap holes. According to the invention, the tap hole zone is separated for forming a space separated from the remaining space of the boiler plant, wherein the separated space comprising at least a wall or walls and a ceiling and a door or doors for forming a shield room, inside which a worker can operate temporary.EFFECT: increased efficiency.9 cl, 4 dwg

ethod for fibre materials screening // 2635792
FIELD: textile, paper.SUBSTANCE: method for fibre materials screening, including the loading of the fibre material through the inlet central hole in the trunnion into the interior cavity of the screening element, screening the fibre through the gaps between the turns of the screening element, the amount of which is adjusted by the rack rods to create the pulsation and the partial cleaning of the inner surface of the screening element from the rotating rotor switching on by the hydrodynamic blades, discharge of screening wastes through the outlet central hole of the trunnion. According to the invention, during the screening process, the control of the supplied fibre material pressure head is carried out by means of the contact manometer, that depends on the thickness of the screening wastes layer on the inner surface of the screening element. With the increase in the pressure head upto the limit value, the fibre materials loading is stopped simultaneously with the rack rods withdrawal by means of the hydraulic cylinders and the reduction of the gaps between the turns of the screening element and the subsequent supply of water through the central inlet with the discharge of the screening wastes with water through the central outlet, followed by the resumption of the screening process with provision by the racks rods the optimum values of the gaps, required for the quality screening of fibre materials.EFFECT: improved screening quality and productivity.2 dwg
Hydrophobically dressed fiber material and method for producing layer of dressed material // 2635615
FIELD: textile, paper.SUBSTANCE: invention relates to a multi-layer cardboard having at least one middle layer formed from such a fibrous web, as well as to the use of a thermosensitive surfactant in the mentioned methods and products. According to the method of microfibrillated cellulose (MFC) and a hydrophobically dressed agent, a foam with water and a thermosensitive surfactant are obtained. The foam is fed to the forming fabric of the papermaking or cardboard machine, dehydrated by sucking air through the forming fabric and dried to form a web of paper or cardboard. In order to prevent gradual degradation of the hydrophobically dressed agent, the hydrophilic functionality of the surfactant is eliminated by heating.EFFECT: inclusion of pulp with fibres longer than fibers of MFC provides high bulk, combined with a high value of ply bond by Scott, providing improved tensile strength in dry and wet state for paper and cardboard products.24 cl, 1 ex
Cellulose compositions, methods for cellulose compositions production and products containing cellulose compositions // 2635162
FIELD: chemistry.SUBSTANCE: viscosity modification composition comprises cellulose slurries containing at least 60% of cellulose by dry weight, less than 10% of pectin by dry weight, and at least 5% of hemicellulose by dry weight. The composition can be concentrated to solids content of at least 25% by weight by compression at low pressure while retaining the ability to be resuspended in an aqueous medium.EFFECT: resulting aqueous medium retains the desired properties, increased viscosity, or increased dispersion of pigment particles, to the same extent as the composition prior to compression.22 cl, 7 dwg

Bicomponent crimped coloured polymeric fibre for paper protection against forgery // 2635128
FIELD: chemistry.SUBSTANCE: fibre has a side-by-side structure and is moulded from a melt of one thermoplastic polymer containing two polymer-soluble dyes of the visible spectrum or luminescing in UV or IR light. The fibre is characterized by the criterion of tortuosity (CT) within the limits of 1.007-1.209. The concentration of each dye in the fibre is 0.1-0.9 wt %. The dyes contained in the fibre are selected for calculating the difference in the yield point values of the moulding melt containing the first dye and the yield point of the moulding melt containing the second dye in the range of 0.9-39.1 g/10 min.EFFECT: increased degree of the paper protection.5 cl, 5 dwg, 3 tbl, 3 ex

ethod and device for processing liquid flows of pulp mill // 2635040
FIELD: textile, paper.SUBSTANCE: device includes a pulping process for obtaining pulp; at least one washing stage for washing the mentioned pulp; at least one bleaching step for bleaching the washed pulp; a waste water treatment plant comprising at least one purification stage for purifying sewage waters; and a water treatment plant comprising at least one purification stage; and the method comprises directing a liquid flow comprising a portion of the purified sewage waters from the waste water treatment plant and/or a portion of the process water to at least one purification stage of the water treatment plant to purify the liquid flow in the mentioned at least one purifying unit of water treatment plant, to obtain reusable water; and using the mentioned reusably water as process water during at least one process and/or at the stage of pulp mill process. In addition, the invention relates to a device for processing liquid flows in the pulp mill and to application of the water treatment plant of the pulp mill for purifying process water and/or sewage waters from the waste water treatment plant.EFFECT: simplified and shortened duration of the process.16 cl, 5 dwg, 1 tbl

ethod and device for processing liquid flows on pulp mill // 2634894
FIELD: technological processes.SUBSTANCE: method of processing liquid flows on a pulp mill, wherein the device includes: a cooking process for producing cellulose pulp, at least one washing stage for washing the cellulose pulp, at least one bleaching stage for cellulose pulp bleaching, a sewage treatment plant, a water treatment plant and wood preparation unit. The method includes: separating process waters with low chloride content having a chloride content of less than 200 mg/l, for at least two flows according to their COC (chemical oxygen consumption), directing at least part of process waters with a low chloride content to the pulp mill to be re-used as process water.EFFECT: improvement of the method.19 cl, 2 dwg

Evaporation tank with flared inlet insert // 2634893
FIELD: machine engineering.SUBSTANCE: evaporation tank comprising an inner chamber having an inner surface formed by a sidewall of the evaporation tank; a channel for waste steam connected to the upper portion of the chamber; an inlet channel for liquid connected to the lower portion of the chamber; an inlet pipe having an insert outlet channel and inserted into the chamber inlet. The inlet pipe passes into the sidewall and the insert outlet channel has extended form in cross-section oriented substantially in parallel to the central vertical axis of the evaporation tank and substantially perpendicular to the radial line of the evaporation tank, so that the insert outlet channel is substantially tangential to the sidewall.EFFECT: invention provides efficient and continuous operation of the device.5 cl, 5 dwg

ethod for paper product treatment // 2634878
FIELD: textile, paper.SUBSTANCE: invention relates to a method for the paper product treatment, comprising quenching an irradiated paper product containing a first carbohydrate-containing material irradiated with ionizing radiation at a dose of at least 0.10 Mrad to increase the molecular weight of the paper product.EFFECT: functionalization or stabilization of an ionized paper product.5 cl, 20 dwg, 5 tbl

Optically variable security threads and strips // 2634772
FIELD: physics.SUBSTANCE: security thread or strip comprises a) an optically variable layer giving a different colour perception at different viewing angles and made of an optically variable composition comprising from 2 to 40 wt % of optically variable pigments. The mentioned optically variable layer comprises one or more gaps in the form of signs or consists of signs made of an optically variable composition. Weight percentages are indicated based on the total weight of the optically variable composition; b) a permanent colour layer having a colour coinciding with the colour perception of the optically variable layer at the viewing angle and made of a permanent colour composition containing from 1 to 20 wt % of one or more colourants and/or from 0.1 to 45 wt % of inorganic pigments, organic pigments or mixtures thereof. The mentioned layer of permanent colour either contains one or more gaps in the form of signs, or consists of signs made of a permanent colour composition, wherein the weight percentages are indicated based on the total weight of the permanent colour composition; c) a holographic metal layer and d) a substrate; i) the holographic metal layer faces the substrate, ii) the permanent colour layer and the optically variable layer are disposed over the holographic metal layer, and iii) the permanent colour layer and/or the optically variable layer are facing/is facing the environment, and wherein the optically variable layer, the permanent colour layer and the holographic metal layer are at least partially co-visible from the side of the security thread or strip containing the optically variable layer and/or the permanent colour layer.EFFECT: security threads or strips demonstrate a highly dynamic visual effect of motion when tilted.15 cl, 8 dwg
ethod of bleaching hardwood sulphate cellulose // 2634586
FIELD: chemistry.SUBSTANCE: method includes the steps of delignification with hydrogen peroxide followed by alkaline treatment and final bleaching by using hydrogen peroxide. Delignification of cellulose is carried out in two stages, at the first stage with hydrogen peroxide in an acidic medium in the presence of a sodium molybdate catalyst at the flow rate of H2O2 2.5-4.0%, H2SO4 0.5-1.5%, Na2MoO4 0.05-0.5 wt % of absolutely dry cellulose at 65-85C for 2-2.5 hours and a mass concentration of 10% followed by the alkaline treatment of NaOH at the flow rate of 2.0 wt % of absolutely dry cellulose at the temperature of 60-70C for 1.5-2 hours in the presence of hydrogen peroxide at the flow rate of 0.5 wt % of absolutely dry cellulose. The second stage of delignification is carried out with hydrogen peroxide in an alkaline medium at the flow rate of H2O2 1.5-2.5%, NaOH 2.0%, Na2SiO3 3.0 wt % of absolutely dry cellulose at the temperature of 85-90C for 2-3 hours. After the stages of delignification, the weight is treated with a chelating agent, which uses an aqueous solution of polyaminomethylene phosphonates, at the flow rate of 0.2-0.4 wt %, HCl 1.0 wt % of absolutely dry cellulose for 50-80 min at the temperature of 60-70C. Then, final bleaching is carried out by hydrogen peroxide at the flow rate of H2O2 1.2-2.0%, NaOH 0.7%, Na2SiO3 1.7 wt % of absolutely dry cellulose at the temperature of 75-85C for 2-3 hours.EFFECT: increasing the ecological efficiency of the bleaching process of hardwood sulphate cellulose while maintaining its physicochemical and mechanical properties.2 tbl, 9 ex
Processing of black liquors in production of cellulose // 2634380
FIELD: chemistry.SUBSTANCE: when processing black liquors in the production of cellulose, which includes the oxidation of black liquor with sulfuric acid, the coagulation of organic compounds, the evolution of gases and organic compounds from the suspension, washing and drying of the solid product of organic compounds, the oxidation is conducted from the total black liquor stream before evapouration at the initial concentration of black liquor of 8-20% of absolutely dry substances with sulfuric acid of 80-90% at its consumption of 1.14-5.70 m3/h, with vigorous stirring.EFFECT: increasing the yield of organic compounds from the total black liquor stream before evapouration with its sulfuric acid treatment and simultaneous increase in productivity and environmental safety of the processing of black liquor by eliminating the RB.1 tbl
Cellulase composition containing cellulase and polymers for paper production, intended for use in increasing paper strength in dry state // 2634239
FIELD: textile, paper.SUBSTANCE: cellulase compositions which are suitable for use as effective additives for paper production and which are intended to improve the paper product strength in a dry state and to reduce power consumption during cleaning in the paper production processes and improve paper products are described. The mentioned cellulase compositions are formed using cellulase, polymers for controlling impurities for producing paper, protein stabilizers and cellulase enhancers.EFFECT: compositions are characterized by a higher endocellulase activity in combination with improved stability compared to standard cellulase and show different efficacy in improving the strength properties of the paper in a dry state compared to the cellulase used alone.22 cl, 9 tbl

ethod of processing waste sorting of sulphate cellulose in molded products // 2634235
FIELD: technological processes.SUBSTANCE: method includes the processes of accumulation of waste sorting, dilution of waste sorting with water to the required concentration at the grinding stage, grinding of waste sorting, accumulation of pulp, dilution of the pulp with water to the required concentration, manufacturing of moulded products by depositing fibers on the mould surface and forming a wet product on of the mesh part of the mould by increasing the layer of fibers by filtering water under vacuum, followed by pressing and drying of complete product.EFFECT: production of moulded products from waste, no loss of raw materials, avoidance of environmental pollution.2 tbl, 8 ex

Wallpaper having appearance of textile material // 2633576
FIELD: textile, paper.SUBSTANCE: wallpaper contains: main layer of paper; the first foam layer having a predetermined pattern formed on the upper surface of the main paper layer; the second foam layer applied over the first foam layer; a printed layer applied over the second foam layer; and a colouring coating layer applied over the printed layer. Moreover, the colouring coating layer is formed either from only non-foamed coating layers, or from foamed coating layers, or from a combination of non-foamed coating layers and foamed coating layers.EFFECT: appearance of the wallpaper similar to the textile material woven using basic and weft yarns after pre-colouring the weft yarns is provided.10 cl, 12 dwg
ethod of introducing filler in aerodynamic paper forming // 2633535
FIELD: printing industry.SUBSTANCE: paper with a single-sided coated layer is used in the manufacture, for example, of posters and labels. In the method for coating air-conditioning paper, comprising moistening the cellulosic semi-finished product with water to a moisture content of 48-50%, separating the semi-finished product prior to the formation of a fiber aerosolize, and then obtaining a fibrous layer that is wetted between two cloths aqueous starch solution, followed by pressing and drying the paper web, Chalk with a particle size of 4.5-5.5 mcm with an aqueous solution of sodium carboxymethylcellulose are sprayed onto one of the surfaces of the formed fibrous layer from the calculation and 10-40 grams of chalk/m2 before moistening, which is carried out with an aqueous solution of starch with a concentration of 0.9-1.1%. One-sided deposition of the product of the interaction of chalk with an aqueous solution of sodium carboxymethyl cellulose on the surface of the fibrous layer is possible in the technology of aerodynamic paper forming. Depending on the weight of the fibrous layer and the roughness of the fibers, the through interfiber pores of the formed fibrous layer have a linear dimension smaller than the diameter of the particles of the chalk treated with aqueous sodium carboxymethylcellulose, which allows keeping the chalk particles on the surface of the fibrous layer. Sputtering of the product of the interaction of chalk with an aqueous solution of sodium carboxymethyl cellulose on the surface is carried out for a hardwood semi-finished product with a mass of the fibrous layer not less than 40 g/m2, For coniferous semi-finished products with a mass of fibrous layer not less than 60 g/m2.EFFECT: increase the optical and print properties of paper.2 cl, 3 tbl, 14ex
echanical fabric containing stripes of material with reinforcement wound spirally // 2633270
FIELD: textile, paper.SUBSTANCE: mechanical fabric, such as an endless tape or sleeve for use in the manufacture of nonwoven materials, and a method of its manufacture are disclosed. The mechanical fabric is created by spirally winding stripes of polymeric material, such as a technical belt or tape material, and joining the adjacent sides of the material stripes using laser or ultrasonic welding. Then the fabric can then be perforated using a suitable method to make it permeable to air and/or water.EFFECT: increased strength properties.34 cl, 41 dwg

echanical fabric containing spirally wound stripes of material with reinforcement // 2633267
FIELD: textile, paper.SUBSTANCE: mechanical fabric, tape, or sleeve is created by spirally winding stripes of polymeric material, such as a technical belt or tape material, and joining adjacent stripes of material using laser or ultrasonic welding. The fabric, tape or sleeve can then be perforated using a suitable method.EFFECT: opportunity to make the fabric and tape permeable to air and/or water.34 cl, 39 dwg

echanical fabric containing stripes of material wound spirally and method for manufacturing such fabric // 2633195
FIELD: textile, paper.SUBSTANCE: mechanical fabric, tape or sleeve and a method for manufacturing such fabric, tape or sleeve are disclosed. The mechanical fabric, tape or sleeve is created by spirally winding stripes of polymeric material, such as a technical belt or tape material, around two rolls with a side-by-side arrangement wherein a gap is formed between adjacent edges. The second material, for example a gap filler material, is placed between the mentioned adjacent edges, and the adjacent edges are joined by melting the filler, the stripes of the polymer material, or both. The gap filler may have a specific cross-sectional shape corresponding to the shape of the gap.EFFECT: increased strength.38 cl, 18 dwg
Transparent filter material // 2631802
FIELD: food industry.SUBSTANCE: filter material contains transparent fibers and scutched cellulose fibers characterized by the grinding degree in the range of 30-80 degrees of Shopper-Rigler.EFFECT: increase in tensile load and relative elongation while preserving the transparency of the filter material.15 cl, 2 tbl, 2 ex
Paper of stable size and method of its industrial manufacture // 2630093
FIELD: textile, paper.SUBSTANCE: paper of stable size includes base-paper, impregnated with an impregnating mixture on at least one front side, which consists of at least one alcohol sugar with common formula HOCH2[CH(OH)]nCH2OH, where n = 2, 3, 4 or 5; of urea and at least one substance isolated from polyalkyleneglycol and glycerol.EFFECT: invention allows for the production of paper which has a low stretch ration in wet condition, and also proposes substances and mixtures to give modifying properties to the paper or to improve the paper size stability.20 cl, 1 tbl, 4 ex

Stable polyacrylic acids, their manufacturing and their application // 2629953
FIELD: chemistry.SUBSTANCE: composition is described for application in mineral processing comprising a polymer comprising, at least, one carboxylic acid and a filler selected from the group consisting of kaolin, talc, clay, white carbon, aluminium hydroxide, titanium dioxide, calcium carbonate, calcite, marble and their mixtures. The polymer comprising, at least, one carboxylic acid is a homopolymer of acrylic acid or a copolymer of acrylic acid and an unsaturated monomer selected from the group consisting of maleic acid, fumaric acid, maleic anhydride and combinations thereof, and wherein the said polymer is in acid form and is not neutralized, has a molecular weight (Mw) of 1000 to 10,000 g/mol and is characterized by better rheological characteristics in mineral slurries with respect to the control polymer compared to carboxyl composition, molecular weight and polydispersity, wherein the control polymer is a completely neutralized polymer. The method for processing mineral raw materials is also described, and the method for manufacturing a product selected from paper, ceramic and ink, that comprises providing the above composition, is described.EFFECT: improving the compound properties.8 cl, 8 dwg, 3 tbl, 4 ex

ethod and system of introducing technological liquid from processing stage into washing and/or filtering device // 2629157
FIELD: chemistry.SUBSTANCE: according to an advantageous embodiment of the present invention, the method and system are based on simultaneous separating and degassing the pulp immediately upstream of the washing and/or filtering device.EFFECT: improvement of the system and method.17 cl, 8 dwg
ethod of automatic determination of content of liptic inclusions in the process of secondary processing of fibers // 2628862
FIELD: technological processes.SUBSTANCE: method for continuously and automatically determining stickiness levels during the production of a secondary pulp using Near Infrared Spectroscopy (NIR spectroscopy) in conjunction with one or more automatic sheet forming machines includes: - determining the stickiness levels for a series of samples using a standard laboratory analytical procedure, use of the obtained results as reference values to create one or more calibration models based on BIC- Spectroscopy and storage of data set (s) of the calibration model (s) in the electronic memory device - automatic sampling at least one sampling point in the production line, transportation of the sample from the processing line to a sampling line into at least one automatic sheet forming machine, forming a sheet from a sample and drying this sheet; - transporting the dried sheet formed in step (b) to the measurement zone and recording for this spectral sheet in the near infrared region to obtain spectral data, - processing the spectral data obtained in step (c) on the computer using at least one of the stored calibration model and obtaining for each calibration model an output of the stickiness level in the process of obtaining the secondary pulp.EFFECT: increase the accuracy of determination.13 cl, 5 tbl, 10 dwg

Refiner plate with smooth wavy groove and methods related to it // 2628575
FIELD: wood processing industry.SUBSTANCE: each plates segment for grinding contains the grinding side. Each of the grinding sides has the grinding area. The distance between the grooves in the first plate segment and the grooves in the second plate segment is constant along the arc, passing through the grinding area. In the second embodiment, the first plate segment has the grinding face surface containing the grinding area. The grooves contains the first deep section at the distance equal to the first radius from the first refiner plate segment axis of rotation, and the first small section at the distance equal to the second radius. The grooves contains the second deep groove section at the distance equal to the second radius and the small section at the distance equal to the first radius. Pour the cellulosic material and rotate one of the plates. Grind the cellulosic material and duct the material flow through the grooves during rotation.EFFECT: improvement of the cellulosic material grinding quality.35 cl, 4 dwg