Paper-making and production of cellulose (D21)

D   Textiles; paper(37568)
D21            Paper-making; production of cellulose(8092)

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

Dry cellulose fibers and the process of making the same // 2628382
FIELD: chemistry.SUBSTANCE: dry cellulose fibers contain at least 50 wt % of fibers having a length of up to 350 mcm and a diameter in the range of 100-500 nm, where the fibers do not contain additives, are not derivatized and are redispersible in water. A film of dry cellulose fibers containing the described fibers is shown where the film is water dispersible. Also described is a process for producing a dry film of cellulose fibers, comprising preparing a liquid slurry from the above-described cellulosic fibers obtained by multi-step highly refined wood or plant fibers and retaining more than 90% of the fibers on the forming section of the papermaking machine in which the fibers do not contain additives and are not derivatized. The film can be converted into powders or flakes for transport, storage or subsequent use.EFFECT: creation of repeatedly water-dispersible fibers of fibrillated cellulose, obtained without the use of chemical additives and derivatization.23 cl, 3 dwg, 5 tbl, 5 ex

Textile type texturized nonwoven fabric, containing paper forming filament, calender roll and material manufacturing method // 2628381
FIELD: textile, paper.SUBSTANCE: calender roll is used to produce the texturized nonwoven material, containing the paper-forming filament. The calender roll includes a protruding relief, that includes: a base element, having the ring shape, at that the ring defines a top relative to the central part of the ring, defining the recess and the grinded surrounding area, at that the ring containing at least one radial channel, providing the recess communication with the grinded surrounding area in such a way to determine the discrete calendering surface; repeating of the specified base element along a plurality of rows and columns, substantially along the entire peripheral surface of the calender roll, at that the repeating is being regular, with the exception of a plurality of substantially longitudinally oriented parts and transversely oriented parts, at that the mentioned parts have limited size with respect to the size of the calender roll and are optionally distributed so as to define a plurality of the optionally distributed longitudinal and transverse lines in the texturized nonwoven material, containing the paper forming filament, forming a visually textile type texture.EFFECT: creation of the texturized nonwoven material, containing the paper forming filament, having the appearance of the textile type material with high quality, improved aesthetic characteristics.16 cl, 13 dwg

Valuable document protected from forgery, and method of determining its authenticity // 2628378
FIELD: physics.SUBSTANCE: document includes a substrate and contains two hidden markings visually indistinguishable, when observed in daylighting on its surface, or in its composition. The markings are made in the form of periodic code sequences. The code sequences contain predetermined information. The material of one of the markings has magnetic properties different from the magnetic properties of the substrate material, and the second marking material has spectral properties or luminescent properties in the infrared spectral range that are different from the corresponding spectral or luminescent properties of the substrate material.EFFECT: increasing the security level of a valuable document from partial forgery.18 cl, 7 ex, 4 dwg
ethod of inspection of the authenticity of a protected document // 2627873
FIELD: physics.SUBSTANCE: invention relates to a method of verifying the authenticity of a security document, in particular a fiduciary document containing a zone with an invertible luminescent mechanical compound located inside or on its surface, of the formula: where R is an alkyl chain having 1 to 12 carbon atoms. The method includes the step of subjecting said zone to ultraviolet irradiation so that the entire zone becomes visible to the naked eye in the first colour (C1) of the fluorescence. The method also includes the step of heating at least mentioned zone to a temperature of at least 50°C without any friction or mechanical stress. In this case, the authenticity of the protected document is confirmed by changing the first colour (C1) of fluorescence to a second colour (C2) of fluorescence, different from the first.EFFECT: additional enhancement to authenticate a protected document.16 cl, 4 dwg

Cover composition, method of coating cover, coated substrate, packaging material and packaging for liquid // 2627404
FIELD: chemistry.SUBSTANCE: surfactant is a water-soluble non-ionic ethoxylated alcohol of the formula RO(CH2CH2O)xH, wherein R is iso-C13H27 and x is 8 or R is iso-C10 and x is 5 or 7. The solids content in the composition is from 4 to 20 wt %. A method for applying a gas impermeable layer to a substrate using a coating composition and a coated substrate having at least one gas impermeable layer obtained by applying a coating composition to the substrate is also described. In addition, the present invention relates to a packaging material comprising a coated cardboard on which a coating composition is applied and a liquid package containing such a packaging material.EFFECT: ensuring the stability of the coating applied by the irrigation at a value of dynamic surface tension up to 50 mN M and ensuring faultless operation at very low flow rates, high quality protection combined with an acceptable small number of point defects.14 cl, 8 dwg, 1 tbl
ethod for producing starch binding for surface paper sizing // 2627373
FIELD: chemistry.SUBSTANCE: simultaneous supply of persulphate ammonium, sodium or potassium solution is performed into a digester of natural starch, in the amount of 0.25-0.60 wt % of absolutely dry starch and water in an amount providing the concentration of starch suspension in the range of 8-16 wt %. The resulting suspension is cooked at 110-130°C for 30-40 seconds, after which it is diluted with water to a concentration of 3-10 wt %. The process is carried out continuously.EFFECT: reducing the duration of cooking binder, increasing the productivity of the process and reducing the consumption of oxidizer while maintaining the high quality of the binder.1 tbl, 4 ex
ethod of control of polymer particles distribution on sizes in proceeding of water polymer dispersion, water polymer dispersion and its application // 2627365
FIELD: chemistry.SUBSTANCE: method of controlling the size distribution of polymer particles formed during the preparation of the aqueous polymer dispersion is described; it comprises: preparing an aqueous solution of a polysaccharide which comprises: (a) 10 to 40 wt % of a polysaccharide containing a free hydroxyl group such as starch, polymerization in a solution of the polysaccharide in the presence of a water-soluble oxidation-reduction system for crosslinking by grafting; (B) from 30 to 60 wt % of at least one optionally substituted styrene, (c) from 60 to 30 wt % of at least one C1-C4 alkyl (meth) acrylate, (d) from 0 to 10 wt % of other ethylenically unsaturated copolymerizable monomers, wherein the sum of (a)+(b)+(c)+(d) is 100%. The polysaccharide is an anionic starch derivative, and the size distribution of the polymer particles obtained is controlled by adjusting the viscosity of the polysaccharide solution before polymerization to a level of <10 mPaSec⋅, with a solid content of 15%, as measured at 23°C using a Brookfield LVDV viscometer with a spindle 18 at 60 rpm. An aqueous polymer dispersion for use in the pulp and paper industry is also described.EFFECT: preparation of an aqueous polymer dispersion containing small particles, with a narrow size distribution.15 cl, 1 tbl, 7 ex

Cover composition, method of coating cover, coated substrate, packaging material and packaging for liquid // 2626848
FIELD: chemistry.SUBSTANCE: invention relates to a gas impermeable cover composition suitable for a water-borne coating, in particular relates to a method of applying a gas impermeable layer to a substrate using a coating composition, a coated substrate, a packaging material comprising coated cardboard, and a liquid package containing such a coating packing material. The composition comprises a polymer and a surfactant, the polymer is selected from polysaccharides or a mixture of polysaccharides and polyvinyl alcohol. The above-mentioned polysaccharides are soluble, dispersible or suspended in water, and the surfactant is a water-soluble non-ionic ethoxylated alcohol, the solids content of the composition being 4 to 20 wt % and the surfactant having the formula RO(CH2CH2O)xH, wherein R is iso-C13H27 and x is 8 or more, or R is iso-C10 and x is 5, 6, 7, 8, or 11.EFFECT: obtaining a coating that is suitable for the food industry does not contain any toxic or harmful substances and which is safe to use.24 cl, 8 dwg, 1 tbl, 7 ex

Device for moulding the products from cellulose-filled compositions // 2624320
FIELD: technological processes.SUBSTANCE: device for moulding articles from cellulose-filled compositions, including a forming mould on which a wire mesh is fixed. To ensure a tight connection between the moulding matrix and the base, there is a rubber band. A flange with a grid welded to it is fastened with a screw to the moulding matrix with drainage holes of 1.5-2.0 mm, the distance between which is 5-8 mm. The stem with the reflector is fixed to the adapter cup with the nozzle.EFFECT: increasing the height of the resulting workpiece, eliminating the uneven distribution of particles along the thickness of the workpiece.2 dwg
Filter paper breaking down in water quickly // 2624301
FIELD: textile, paper.SUBSTANCE: paper used as a filter material or a filter wrapping paper for a cigarette filter is made of cellulose fibers for at least 80 wt %, where at least 80 wt % of the said fibers consist of a mixture of long-fiber cellulose and mercerized cellulose. At the same time from 0 to 90 wt % of the said mixture consists of mercerized cellulose, and the remainder consists of long-fiber cellulose, and the grinding degree of the cellulose fibers of the said mixture determined according to ISO 5267 does not exceed 30°SR. During the breaking test with devices described in TAPPI T 261, after 30 seconds the paper is broken down for at least 60%, preferably at least 70% and particularly preferably at least 80%.EFFECT: invention provides a paper for a cigarette filter, which breaks down in water quickly and is easy to manufacture.15 cl, 5 ex

ethod for producing cardboard-base and cardboard-base for laminate material // 2623405
FIELD: textile, paper.SUBSTANCE: method comprises the stages of: a) obtaining the recycled fibrous material mixture, b) obtaining, at least, one fibrous material suspension, which comprises, at least, a portion of the obtained fibrous material mixture, c) preparing, at least, one fibrous material suspension, consisting in that, at least, the ash level of the fibrous material suspension is decreased to the dry fraction ash level of the fibrous material suspension not more than 15 wt % and admixed with, at least, one additive to, at least, one fibrous material suspension, d) producing a layer system of, at least, one fibrous material suspension. Another aspect of the invention relates to the cardboard-base for manufacturing a laminate material.EFFECT: creating cardboard-base for the laminate material consisting of a recycled fiberrous material mixture having low abrasiveness with respect to the cutting tool, good breathability and improved balance of cost and environmental impact.57 cl, 3 dwg
Paper-base for decorative coating material // 2623260
FIELD: textile, paper.SUBSTANCE: paper-base has a surface coating on the original paper, which contains an alkaline earth metal salt. The coating contains, at least, 5 wt % of a polymeric binder. Also, the coating contains an inorganic pigment having a specific surface area of 100-400 cm2/g measured by the BET method.EFFECT: invention provides a paper-base having a good ability to be subjected to printing by the ink jet printing method.13 cl, 1 tbl, 6 ex

ethod and device for treating liquid flows in pulp mill // 2621662
FIELD: chemistry.SUBSTANCE: method of treating liquid flows in pulp mill, wherein device comprises a wood preparation unit, an unbleached pulp production unit comprising boiling, washing, sorting and oxygen delignification stages, to produce cellulose pulp, a bleaching unit to bleach the obtained cellulose pulp, a chemical regeneration block, a pulp-drying machine, a soda recovery boiler which generates blow-down water of the bolier, an evaporating apparatus which generates condensates, a waste water treatment plant and water production plant, wherein the method comprises transportation from at least one of the following water sources: A) bleaching filtrates (alkali-oxygen-peroxide) from the bleaching unit (30), B) sealing water of Nash pump from the bleaching unit (30), C) condensated from evaporating apparatus (40), D) water from the second settler of the waste water treatment plant (50), E) cooling water of injector condenser from the chemical regeneration block (60), F) sealing water of vacuum pump from the chemical regeneration block (60), and G) blow-down water of the soda recovery bolier (70) to at least one of the following usage centers: H) washing of logs at the wood preparation unit (10), I) chopping at the wood preparation unit (10), J) chip sorting at the wood preparation unit (10), K) conveyor for chip at the wood preparation unit (10), L) washing during oxygen delignification at the unbleached pulp production unit (20), M) thinning water at the unbleached pulp production unit (20), N) plates of drum device for displacement washing of the bleaching unit (30), P) thinning water at the bleaching unit (30), Q) water for sparging dehydrating plant of the pulp-drying machine (80), R) water for sparging gravitation table of the waste water treatment plant (50), S) tank for diluted liquor of the chemical regeneration block (60), T) tank for white liquor condensate of the chemical regeneration block (60), and U) mill water-supply system by connecting water sources to its usage centers according to the following pairs: - from the sourse A or D to the center H, - from the source A or D to the center I, - from the source A or D to the center J, - from the source A or D to the center K, - from the source A, B or D to the center L, - from the source A, B or D to the center M, - from the source B to the center N, O, P or Q, - from the source A, B, C, D, E or F to the center R, - from the source G to the center S or T, or - from the source E or F to the center U. The connection can be carried out according to one or more number of the pairs selected from the abovementioned pairs.EFFECT: increased efficiency of treatment.12 cl, 2 dwg, 3 tbl

Reduced mass plates for the refiners and dispersants // 2621385
FIELD: machine engineering.SUBSTANCE: plate segment adapted for mounting on a disc disperser, or a refiner for the cellulose crushed material comprises a front side having a dispersing teeth or grinding the blades, the back side having a projecting rack surrounding the fastener installation structure, and protruding plate positioning portion, and side edges of the plate segment, the radially outer edge and a radially inner edge extending between the side edges, wherein the back side has no protruding structures along the side edges. Also the disk assembly is disclosed as well as the plate segment to the refiner or dispenser and a method for forming plate segment comprising a casting plate segment using the molten metal is poured into a mould, where the form comprises a recess for the rear side of the plate segment that contains no protruding ribs along the side edges back-side cooling plate segment and the segment extracting from the mould after pouring molten metal, as well as cleaning and removing from the sprue plate segment cooled and grinding the cooled plate segment.EFFECT: weight reduction.20 cl, 13 dwg
Composition comprising water-repellent agents and stabilizing agents and methods for their manufacturing and application // 2621116
FIELD: chemistry.SUBSTANCE: composition may comprise from 40 to approx. 60 wt % of lignosulfonic acid or its salt, 1 to 20 wt % of water-repellent agent and 20 to 59 wt % of liquid medium.EFFECT: reduced water absorption and swelling along pressed wood thickness.16 cl, 1 tbl, 2 ex
Fiber web of paper or carton and its manufacture method // 2621113
FIELD: textile, paper.SUBSTANCE: according to the method microfibrillated cellulose (MFC) together with fiber pulp with longer fibers, such as chemical-thermomechanical wood pulp (CTMP), is blended with foam from water and a surfactant, the foam is supplied onto the forming wire of a paper- or cartonproduction machine, dewatered via air suction through the forming wire and dried to get the final web.EFFECT: method provides a high bulk combined with a high resistance against stratifying after Scott, providing improved strength of paper and carton products when stretched in dry and wet conditions.14 cl, 1 dwg, 2 ex
icroparticles of copolymer containing vinylamine as additives in papermaking // 2621064
FIELD: textile, paper.SUBSTANCE: additive producing method is that the reaction vinylformamide with styrene or substituted styrene is carried out under the conditions of free radical emulsion polymerization. The first polymeric product is obtained, it comprises randomly distributed repeating units of formula (I) and (II), in which Ar is an aromatic moiety selected from the group consisting of phenyl and phenyl substituted by alkyl; R1 is hydrogen or alkyl; x and y are numbers that are greater than 0 moll. %, and the sum of x and y is 100 moll. %, the x:y ratio ranges from 99:1 to 50:50. Further hydrolysis of the first polymeric product is carried out by treatment with an acid or base. The second polymer product is obtained, it represents a terpolymer comprising randomly distributed repeating monomer units described by at least two formulas (III), (IV), (V) and (VI), wherein R2 and R3 are H; R4 is H or alkyl; m1 and m2 independently stand for a positive number of moll. %, and m3 and m4 independently can be from 0 to 99 moll. %, and the sum of m1, m2, m3 and m4 is equal or less than the x moll. % of the formula (I). The first polymeric product is in the form of microparticles which have size in the range from 50 to 200 nm. The second polymeric product is in the form of microparticles in an aqueous dispersion, and its viscosity measured at ambient temperature of 20 to 25°C at a content of active solids, lying in the range from 13.0 to 18.0%, is in the range of 100 to 500 cps. A paper product comprises an additive of vinyl amine - vinyl formamide terpolymer.EFFECT: increased paper strength in wet and dry conditions.18 cl, 5 tbl, 5 ex
Optical bleaching agents for high-quality jet printing // 2620812
FIELD: printing industry.SUBSTANCE: invention relates to an optical bleaching agent comprising of a mixture of compounds of the formulas and wherein R is hydrogen or methyl; Y is an amino acid that is derived from aspartic acid, glutamic acid or iminodiacetic acid and from which the hydrogen atom of the amino group is removed; and M is an alkali metal cation. The invention also relates to an optical bleaching agent comprising a compound of formula (4), to a process for preparing an optical bleaching agent, to a compound of formula (4), to a composition for bleaching paper surface, and to paper optically bleached with an optical bleaching agent.EFFECT: new optical bleaching agents are obtained, providing a bleaching effect when applied to the paper surface.14 cl, 1 tbl, 9 ex
ethod of producing microcrystalline cellulose // 2620797
FIELD: chemistry.SUBSTANCE: method of producing microcrystalline cellulose involves dissolving 0.01-0.1 g/ml of cellulose in a 5.0-10.0 M aqueous solution of methanesulfonic acid followed by electrochemical purification at anode current densities of 0.005-0.01 A/cm2, filtering, drying and grinding the final product, microcrystalline cellulose.EFFECT: process of acid hydrolysis of cellulose in a solution of methanesulfonic acid is followed by electrochemical purification of the resulting material, using the method of electrochemical treatment of dissolved cellulose, the number of steps required for purification of microcrystalline cellulose is reduced, and no complex technical equipment is required for carrying out the processes.5 dwg, 4 ex
Laminated paper with reduced number of hydrogen bonds // 2620794
FIELD: textile, paper.SUBSTANCE: multilayered web stuff of paper comprises treated cellulosic fibers selectively located in one or more layers. Treated fibers have a substitution degree of 0.02 - 0.07 and constitute 5-50% of the total weight of the multilayer web stuff. Thus, the product based on the paper has a basis weight of 10-60 gsm, a sheet bulk is more than 8 cc/g, and the rigidity index is less than 15.EFFECT: improved bulk and softness of the product based on paper without reducing the tensile strength.18 cl, 4 tbl

Cellulose fibre based backing comprising modified pval layer and method of production thereof and use thereof // 2618724
FIELD: chemistry.SUBSTANCE: backing comprises at least one surface coated with a layer containing at least one water-soluble polymer having hydroxyl functional groups, some of which has already reacted with at least one organic molecule which comprises at least one vinyl functional group and aldehyde functional group.EFFECT: providing cellulose fibre based backings designed for the silicone filming with improved properties such as crosslinking and silicone bonding while reducing the amount of used catalyst.10 cl, 7 dwg, 4 tbl, 8 ex
Paper-like nanocomposite material based on mineral fibers for air cooling systems of evaporative type // 2618722
FIELD: textile, paper.SUBSTANCE: invention relates to a paper-like nanocomposite material based on mineral fibers which may be used as capillary-porous elements of air cooling systems of evaporative type. Mineral fibers are glass and/or basalt fibers with an average diameter of 0.4 microns. Binder is a sodium aluminate NaAlO2 and aluminium sulphate Al2(SO4)3 with the following ratio of components, wt %: mineral fiber - 50-90, NaAlO2 - 5-25 (on Al2O3), Al2(SO4)3 - 5-25 (on Al2O3). The material is produced with the traditional paperproduction equipment using a reflux method. The paper-like nanocomposite material is provided having strong characteristics of height and speed of water rise, water capacity and strength.EFFECT: material is also characterised with thermal, chemo-, biostability, lack of toxicity and exhalation of substances in the air with harmful influence on the human body, resistant properties against mould, fungi and microorganisms in aqueous medium.1 dwg, 1 tbl
Cellulose fibres splitting method and device, fibrous mass treatment method in production of paper, paper drying method and paper product containing split fibres // 2618470
FIELD: pulp industry.SUBSTANCE: invention relates to hollow cellulose fibres longitudinal splitting method. Method comprises stages of fibres moistening, wet fibres supply into gaseous flow under pressure above atmospheric and passing of carrying fibers gaseous flow through Venturi tube. Pressure drop in Venturi tube nozzle creates pressure difference between interior and exterior of fibres and makes fibres split in their longitudinal direction. Invention also aims at fibres splitting device, fibrous mass flushing method, fibrous mass bleaching methods, fibrous mass chemical treatment methods, waste paper refining method, preparation treatment methods of fibrous mass or waste paper for paper-making, dried paper preparation methods, as well as end paper products containing longitudinally split fibres.EFFECT: fibre splitting opens access to fluid confined in intrafibrous lumen, which favors to different types of fibre processing and drying operations, and also reduces final paper fastness while maintaining its strength.34 cl, 20 dwg, 4 tbl

Textile conveyor belt, its production method and use // 2618422
FIELD: textiles, paper.SUBSTANCE: present invention relates to an industrial textile conveyor belt, its production method and use. The belt (1) includes a seam (7) with connecting ends (8, 9) which can be connected together so that the belt will become an endless loop. Connecting ends have areas (S) of the seam with excessive wear threads (20) in the transverse direction (CMD) on the machine surface (6). Excessive wear threads perceive wear strain when the belt slides over the supporting surface (23) of a processing device.EFFECT: invention completes a series of conveyor belts, its novelty is in the material (textile).10 cl, 11 dwg
Biomass liquefaction at low ph // 2617758
FIELD: chemistry.SUBSTANCE: invention relates to the process of biomass processing. The method of processing raw material - lignocellulosic biomass, in which it is subjected to liquefaction by treatment with hot pressurized liquid water at subcritical conditions, wherein the temperature is from 330°C up to lower than 374°C and pH is less than 3.0. The invention is also directed to quenching of liquefaction process according to the above, to prevent, minimize or eliminate clogging and/or blocking of the process equipment with biomass adhesive components during processing according to the above, and to the use of additives in the biomass liquefaction.EFFECT: invention provides processing by liquefying the biomass.13 cl, 3 dwg, 2 tbl

ethod for acid-base treatment of black liquor from sulphate cellulose production // 2617569
FIELD: chemistry.SUBSTANCE: invention relates to sulphate cellulose production. Disclosed is an acid-base method of recovering chemicals, which includes separating organic compounds from black liquor solutions from cellulose production, treating the solution with sulphuric acid to pH>1-5 to obtain a suspension of organic compounds (lignin etc.), filtering and washing the solid phase from the solution, followed by processing into a commercial product. The obtained acidic solution is treated with alkali metal salts, e.g. KOH, to pH>7 and evaporated with crystallisation of the salts to 100-500 g water per 100 g dry salt. The mother salt solution after separating the solid and liquid phases and correcting the solution is fed for cooking pulp chips, and the solid product after separation and drying thereof is removed from the process as a commercial product.EFFECT: invention improves production efficiency based on reducing power consumption when producing cellulose, providing environmental safety of the alkali recovery process by excluding high energy consuming and environmentally hazardous processes from the process chain: burning black liquor in a soda recovery boiler, decarbonisation of limestone, causticisation of soda liquor; reduces material consumption and improves diversification of production.1 dwg
Paper sheet of high wear resistance for producing banknotes // 2617485
FIELD: manufacturing technology.SUBSTANCE: invention relates to a counterfeit-proof paper and concerns a paper sheet of high wear resistance for producing banknotes. Sheet comprises a fibrous base and a protective coating fully covering at least one side of the fibrous base. Said coating contains at least one basic layer on the side of the fibrous base and an outer suitable for printing layer based on polyurethane covering the basic layer. Basic layer contains polyolefin or polyvinylidene chloride (PVDC).EFFECT: invention provides creation of a paper for producing banknotes having high wear resistance.28 cl, 12 tbl, 5 ex
Coating paints based on partially soluble highly-molecular dextrins // 2617366
FIELD: chemistry.SUBSTANCE: coating paint comprises water, at least one pigment and at least one dextrin which has a weight-average molecular weight in the range of 250000-2000000 Da, a solubility measured according to the test A, in the range of 50-85%. Method of producing the mentioned coating paint and method of paper coating using this coating paint are also disclosed.EFFECT: disclosed coating paint provides coated paper with increased resistance to wet picking.17 cl, 4 tbl, 22 ex
ethod for producing valuable document protected from partial forgery, and received document // 2616643
FIELD: physics.SUBSTANCE: method for producing a valuable document is described, that is protected from the partial forgery by composing from fragments of other documents. The method comprises applying, at least, one serial number to the document pictorial field, and applying a marking to the extended portion of the document pictorial field, made in the form of blocks of the graphic elements forming a personalized security document code. The linear size of each graphic element is from 0.1 to 1.0 mm, the technical gaps between the blocks of the graphic elements are not more than 25% of the linear dimension of these blocks, but not less than the size of one graphic element.EFFECT: producing a valuable document with an increase in the reliability of the instrument to determine its authenticity.7 cl, 3 dwg, 3 ex

illing machine // 2616571
FIELD: mechanical engineering.SUBSTANCE: device is intended for grinding SHORT cellulose semi-finished hardwood flooring, low-grade softwood timber, wood pulp, waste paper and annual plants, as well as for grinding semi-finished products of other nature fibers. Grinding machine for highly fibrillated SHORT cellulose fibers without shortening their original length, for the manufacture of paper domestic articles and paperboard, consisting of cone-shaped stationary stator, rotating the rotor and rollers in the annular gap therebetween, coated with highly porous composite material, in which the mass concentration during milling of 3.5-20% or more by friction and sliding zones between the rotor, the stator and the rollers and by the fibers in the rotor and stator surface run-rotating conical rollers.EFFECT: increased efficiency of grinding.1 dwg

Surface-modified calcium carbonate containing mineral and its application // 2616054
FIELD: chemistry.SUBSTANCE: method of obtaining surface-modified globular spherical particles containing calcium carbonate is described, comprising the following stages: a) providing at least one water suspension of the mineral containing the calcium carbonate; b) providing a water-soluble acid selected from phosphoric or sulfuric acid; c) optional additional provision of gaseous CO2 from an external source; d) bringing said water suspension of the mineral containing calcium carbonate of the stage (a) in contact with said acid of the stage (b) and with the specified CO2 obtained in situ and/or introduced from an external source, of the stage (c), under conditions of stirring; e) optional dehydration of the water suspension, wherein at least one technological additive is introduced before, during or after bringing said water suspension of the mineral containing calcium carbonate of the stage (a) in contact with said acid of the stage (b) and with said CO2 obtained in situ and/or introduced from an external source of the stage (c), wherein the technological additive is introduced during one or more stages in said water suspension of the mineral containing calcium carbonate, with the technological additive is added in amounts constituting up to 8 wt % based on the dry weight of the suspension, and said at least one technological additive is selected from the group comprising iron (II) sulfate, iron (III) sulfate, iron (II) chloride, iron (III) chloride, aluminum sulfate, and/or their hydrated forms, silicates, water-soluble cationic polymers, water-soluble amphoteric polymers, water-soluble nonionic polymers and combinations thereof. The water suspension of the spherical surface-modified mineral containing calcium carbonate, the surface-modified mineral containing calcium carbonate, and the use of water suspensions of the surface-modified mineral containing calcium carbonate, or dry spherical surface-modified mineral containing calcium carbonate, and the product selected from the paper, tissue paper, paper for digital photos, paints, coatings, adhesives, plastics or materials for purifying waste water, comprising a water suspension of the spherical surface-modified mineral containing calcium carbonate, or the dry spherical surface-modified mineral containing calcium carbonate, are described as well.EFFECT: surface-modified mineral containing calcium carbonate for use in paints and coatings is obtained, which provides the matting effect and the smooth surface of a paint or coating at its low content.32 cl, 3 dwg, 5 tbl

Banknote base from multilayer film // 2615627
FIELD: manufacturing technology.SUBSTANCE: invention relates to base for banknote from multilayer film in form of rectangular sheet with longitudinal direction and perpendicular to it transverse direction, which has, at least, one stripe-shaped perforated path, which extends in base longitudinal direction or lateral direction, which in first partial areas includes base thinning, and in base thinning has hole passing through base, and in second partial areas has base thickening.EFFECT: proposed solution enables to obtain high quality openings, with opening sharp edges and minimized air inclusions.27 cl, 9 dwg
Packaging cardboard, its implementation, and products made of it // 2615532
FIELD: transportation, package.SUBSTANCE: invention can be used for producing packages for storing liquid food products and other products containing liquid. The packaging of the autoclavable product is made of packaging cardboard. Mentioned cardboard comprises a fibrous substrate and one or more layers of polymeric coating, which is applied to one or both sides of the fiber base. The fibrous base comprises a combination of alkilketendimer (AKD) glue, stearic anhydride (SA), and glue, which enhances the strength in wet state, and aluminum compounds. The packaging is autoclaved at a temperature of at least 130°C.EFFECT: invention allows to give the cardboard packaging the resistance to aggressive liquids, resistance to heat treatment, high resistance to liquid penetration through the raw edge under these influences.13 cl, 8 ex
Oxygen treatment of water and pulp of paper or cardboard production // 2615106
FIELD: chemistry.SUBSTANCE: methods for the treatment of water and pulp used in manufacturing paper or cardboard. By adjusting the amount of oxygen and nutrients in the water or the pulp, the level of bacteria activity can be regulated, and not only fatty acids and unpleasant odour can be removed, but also the formation of CO2, which acts as a buffer in the papermaking process can be promoted.EFFECT: reducing fatty acids content, increasing the pH of the process water, favorable influence on the paper or paperboard manufacturing process due to reducing the calcium content in the water.13 cl
Wood pulp for glass plates release paper manufacturing and glass plates release paper // 2615058
FIELD: textile, paper.SUBSTANCE: wood pulp for the glass plates release paper production is an object of the invention. Silicone content in the noted wood pulp is 0.5 ppm or less of the bone dry wood pulp weight, release paper for glass plates made of the noted wood pulp, and release paper for glass plates, the starting material for the production of which is a wood pulp, in what connection the silicone content in the noted paper is 0.5 ppm or less of weight of bone dry paper. Furthermore, glass plates and release paper laminate, and the wood pulp application for the glass plates release paper production are the objects.EFFECT: release paper for glass plates produced of the wooden pulp according to the present invention, and the release paper for glass plates according to the present invention enables significant control of pollution with silicone of glass plates surface used as substrates for flat panel displays, which require a high degree of purity and high quality.19 cl, 1 tbl, 3 ex
Protective strip and containing it document // 2614683
FIELD: manufacturing technology.SUBSTANCE: invention relates to protective strip intended for partial inclusion into valuable document structure, at least, partially consisting of fibres. Protective strip protrudes on said document surface in form of set of openings. Strip has transparent or translucent substrate, on one of its sides containing visible at reflection coating. Strip also includes lengthwise strip, at least, partially not having said coating and separating first and second filamentary zones, coated with said coating. Each of said filamentary zones has two different appearances and/or optical effects visible at reflection. At that, they contain negative patterns. Negative patterns are interconnected so, that, at least, one pair of interconnected patterns always has same pitch spacing, when it is repeated along said zones.EFFECT: when valuable document viewing creating impression of presence of two different threads, which optical effects make valuable document forgery extremely difficult.10 cl, 12 dwg

ethod of increasing advantages of reinforcing materials for producing paper and cardboard // 2614272
FIELD: textile and paper.SUBSTANCE: invention relates to a method of producing paper, cardboard or thin cardboard. Method involves the following steps: (a) conversion of a water cellulose material containing starch into a paper mass, (b) prevention of microbial degradation of at least part of the starch in processing the water cellulose material containing starch by one or more biocides, and (c) introduction of a dry and/or wet reinforcing polymer into the cellulose material. Method envisages: (A) determination of properties of water phase of the cellulose material selected from electric conductivity, redox potential, pH value, ATP concentration and free starch concentration, (B) making paper, cardboard or thin cardboard using the said method, (C) determination of the same property (A) after time interval Δt, comparing the value determined at step (B) with the value obtained at step (A) and (D) adjustment of the biocide dosage at step (b) and/or the reinforcing polymer dosage at step (c).EFFECT: invention ensures reduction of electric conductivity of the water cellulose material with higher efficiency of reinforcing polymers due to reduction of their consumption.15 cl, 5 dwg, 7 tbl, 4 ex

Package for eggs and method for manufacturing said package // 2613577
FIELD: packaging industry.SUBSTANCE: present invention relates to a method of producing package for eggs, wherein interacting fasteners in cover part and bottom part of package for eggs are formed by and are located relative to each other so as to compensate for change in shape of cover part, arising during production.EFFECT: invention also relates to package for eggs made using said method.39 cl, 9 dwg
Sustainable adsorbable polymers // 2612709
FIELD: chemistry.SUBSTANCE: invention relates to an aqueous suspension of mineral pigment materials with high content of solid substances, containing dispersing substances and/or dispersants based on renewable sources, as well as methods of preparing such a suspension and to use thereof. Aqueous suspension contains mineral pigment material and at least one modified polysaccharide having carboxylation degree within range of 0.6 to 2.0 and characteristic viscosity in range of 3 to 300 ml/g, where carbon of at least one modified polysaccharide exhibits rate of nuclear transformation of 14C to 14N in range of 400 to 890 transformations per hour per gram of carbon, where at least one modified polysaccharide is present in an amount of 0.05 wt% to 5.0 wt% in relation to total weight of solid substances in suspension, Brookfield viscosity of aqueous suspension ranges from 50 to 1,500 MPa⋅s at 20 °C, and content of solid substances in suspension is more than 50 to 82 wt% in relation to total weight of suspension. Modified polysaccharide is used as a dispersing substance and/or dispersant.EFFECT: aqueous suspension is used in production of paper, plastic, paint, food products, fodder, pharmaceutical products, drinking water and/or in agriculture for reducing effect of sunlight and ultraviolet radiation on plant leaves.20 cl, 15 ex
ethod for treating surface of a banknote // 2611503
FIELD: polygraphy.SUBSTANCE: invention relates to a method for treating surface of a banknote, comprising, on at least one of its opposing faces, at least a printed image, comprised of at least a design. This face and its associated printed image have a transparent protective coating. Coating is applied via printing and dried. Coating contains a varnish and an organic compound, incorporating fluorine atoms in the form of at least a perfluoro-polyether (PFPE) group, on said face.EFFECT: invention provides increased durability of banknotes in terms of mechanical strength and chemical resistance at its regular authentication and higher protection.12 cl, 6 dwg, 2 tbl

High solids and low viscous aqueous slurries of calcium carbonate-comprising materials with improved rheological stability under increased temperature // 2610509
FIELD: chemistry.SUBSTANCE: present invention discloses aqueous slurries with improved rheological stability at temperature higher than 65 °C. Said slurries include calcium carbonate containing material and at least one comb-like polymer. Specific viscosity of comb-like polymer, measured at 20 °C and concentration of 45 g/l, differs from specific viscosity measured at 70 °C by 0.15–0.5. Cloud temperature of comb-like polymer, measured in water, is not in range of 20–95 °C. Specific charge of comb-like polymer at pH 8 from -10 C/g to -600 C/g. Viscosity of aqueous slurry at temperature 20–90 °C is 25–1,000 mPa⋅s.EFFECT: decreased thermal sensitivity of slurry and prevention of increase in viscosity thereof in process of manufacture and use at temperatures exceeding 65 °C.22 cl, 1 dwg, 7 tbl, 6 ex

Device and method of cutting by measuring decorative tape paper and use of device for cutting device // 2610498
FIELD: printing.SUBSTANCE: invention reffers to printing and relates to the device and method of cutting to a size of decorative paper tape, and application the device for cutting the tape. The device for cutting the segments of decorative paper tape, that have the coating, includes a flow line with means for decorating and impregnating endless belt paper for converting a ribbon of decorative paper and at least one device for lateral dissolution separating belt lengths decorative paper of a certain length of tape decorative paper . In the feeding direction, before at least one device for transverse dissolution there is at least one device for slitting to separate the decorative paper tape, at least two endless longitudinal tape decorative paper, and at least one deflecting device, which separates the two longitudinal tape relative to one another and leads, respectively, to a separate device for the cross dissolve.EFFECT: invention provides a process of optimization of cutting pieces of decorative paper tape.15 cl, 5 dwg
Device for production of paper with transparent areas and paper produced using device // 2610397
FIELD: textile; paper.SUBSTANCE: device contains a grid for the printing cylinder or dandy roll of papermaking machines equipped with the filigrees with holes. The said holes have 0.2-0.3 mm diameter. The holes evenly distributed throughout all filigree area with the spacing of 0.2-2.5 mm. There are subgrid components secured on the flipside of the grid symmetrically to the location of filigrees, performed in the form of metal or plastic grids with 0.4-0.95 mm meshes. The paper obtained using the said device is also declared.EFFECT: invention allows producing the paper with transparent areas, which is characterised by high transparency in these areas and their enhanced thickness uniformity.5 cl

ethod of applying composition containing cationic trivalent metal and loosener and sheet of loose cellulose made therefrom // 2610240
FIELD: wood working industry.SUBSTANCE: proposed is a method of making a sheet of loose cellulose involving contacting of at least one cationic trivalent metal, a salt thereof or their combination with a composition containing fibres of loose cellulose and water, at the first pH value to form a mixture of loose cellulose; forming a fabric from this mixture of loose cellulose, application of at least one loosening surfactant onto the fabric and raising the pH value to the second pH value, which is greater than the first pH value, for making a sheet of loose cellulose. Also proposed is a sheet of loose cellulose including the fabric containing fibres of loose cellulose, at least one cationic trivalent metal, its salt or their combination, at least one loosening surfactant and having the energy of separation into fibres of <145 kJ/kg. Also proposed are products and applications of the sheet of loose cellulose.EFFECT: proposed is a method of making a sheet of loose cellulose.1 cl
Organopolysilicone polyether drainage aid // 2609260
FIELD: pulp and paper industry.SUBSTANCE: invention relates to means for dehydration of cellulose. Disclosed is a composition of dehydration means, containing polyorganosiloxanes functionalised with side polyethers and/or aliphatic hydrocarbons, having presented structures. Also disclosed is a method of producing said composition and method for increasing dehydration rate and filtering in procedures for washing and disinfection of cellulose.EFFECT: use of disclosed composition for dehydration significantly speeds up dehydration and improves filtration of fibrous mass when processing cellulose.18 cl, 1 tbl, 8 ex

Preventing of starch degradation in production of cellulose, paper or cardboard // 2609245
FIELD: technological processes.SUBSTANCE: invention relates to process waters treatment. Method of starch degradation degree controlling in starch containing process water from cellulose production provides for process water treatment with biocidal system containing zinc ions and oxidizing or non-oxidizing biocide.EFFECT: disclosed method provides effective reduction or prevention of starch degradation with high quality of production.13 cl, 4 dwg, 4 tbl, 4 ex
Softwood craft fibre with improved whiteness and brightness and methods of its production and use // 2608686
FIELD: pulp and paper industry.SUBSTANCE: disclosed is bleached craft fiber from conifer species wood cellulose with high content of alpha-cellulose and higher brightness and whiteness.EFFECT: invention also describes methods for production of craft fibres and products manufactured from it.19 cl, 12 tbl, 7 ex
 
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