Natural or artificial threads or fibres and spinning (D01)

D   Textiles; paper(37391)
D01            Natural or artificial threads or fibres; spinning(10806)

Combination die for production of nanofibrous and microfibrous materials // 2614393
FIELD: manufacturing technology.SUBSTANCE: combined die for production of nanofibrous or microfibrous materials under the present invention comprises a thin-wall electrode and the first non-conducting body adjacent to the first wall of the said thin-wall electrode. Said first body has a wall facing the thin-wall electrode having multiple grooves, herewith the said grooves lead to the distal end of the combined die and have their own proximal ends connected to a source of the formed mixture. Thin-wall electrode, as well as the first non-conducting body, can have either a plate-like or a cylindrical shape. Combined die may additionally include the second non-conducting body adjacent to the second wall of the thin-wall electrode and guiding air from the proximal end to the distal end of the die. Combined die is easily disassembled and cleaned, since forming the fibre capillaries have the shape of grooves formed on surfaces of the first or the third non-conducting bodies.EFFECT: proposed is a composite die for production of nanofibrous or microfibrous materials.6 cl, 5 dwg, 3 ex

Device for fibrous materials production from molten thermoplastics // 2614087
FIELD: chemistry.SUBSTANCE: device for fibrous materials production from molten thermoplastics comprises a housing consisting of upper and lower parts between which a pressurized chamber is formed with an opening for energy carrier supply, and an annular working nozzle communicating with the pressure cavity, wherein an axially symmetric funnel is formed on the top of the housing for molten thermoplastics reception, its outlet portion external surface forms one of the working nozzle walls. At that, the hosuing parts are mounted to provide linear displacement of the upper part relative to the lower along the axis by between 0.0014D and 0.4D, where D is the smallest diameter of funnel, and their fixation in this position. The device comprises means to change and fix geometrical dimensions of the working nozzle, which is a threaded connection of the housing parts, the upper part has four locking holes located circumferentially at angular coordinates 0°, 15°, 187.5° and 202.5°, the lower part has 12 threaded holes with an increment of 30° around the circumference of the same diameter, used for locking screw installation in one of the possible matches of the upper and lower housing holes, that allows to discretely adjust the annular working nozzle clearance in one of 48 positions.EFFECT: simplified design of the device for fibrous materials production from molten thermoplastics, higher fibers quality, in particular, reduced amount of non-fibrous inclusions, extended raw material range for fibrous materials production.3 cl, 2 dwg

Device and method of manufacturing nonwoven spun fabric of elementary fibres // 2613869
FIELD: manufacturing technology.SUBSTANCE: device for production of non-woven spun fabric of elementary fibres, including dies, cooling chamber with possibility to feed process air into it for cooling of elementary fibres located between dies and cooling chamber monomer device for forced air discharge, exhaust device and collector for laying of elementary fibers in nonwoven fabric. Cooling chamber consists of two sections of cooling chamber, while process air can be forced fed from first upper section of cooling chamber in monomer device for forced air discharge with volumetric flow rate VM. Process air escapes from first upper section with volumetric flow rate V1 in second lower section of cooling chamber. Ratio of volume flow rate of VM/V1 ranges from 0.1 to 0.3.EFFECT: device and method of making nonwoven spun fabric of elementary fibres are proposed.15 cl, 2 dwg

ethods of medical active agent delivery by injection of individual health articles containing filament // 2613316
FIELD: medicine, pharmacy.SUBSTANCE: invention refers to medicine and is represented by methods of medical active agent delivery to a mammal. The method includes a stage when the medical article comprising one or more filaments, consisting of: base material of 10-50% by weight, based on dry filament, selected from natural polymers, synthetic polymers, sugars and combinations thereof; medical active agent of 50% by weight, based on dry filament, and moisture less than 20% by weight based on filament, is injected to a mammal. Filaments are obtained by meltdown blowing or by forming liquid film fibers and constitute a nonwoven fabric with a surface density of 20-1000 g/m2. The medical active agent is able to be released from the nonwoven fabric when it is exposed to the conditions of target application.EFFECT: invention delivers higher levels of medical active agents to a mammal.12 cl, 4 dwg, 7 ex
ethod of producing fibres from carbon nanotubes // 2612716
FIELD: chemistry.SUBSTANCE: invention relates to chemical engineering of fibre materials and a method of producing fibres from carbon nanotubes, which can be used for producing high-strength, high-modulus, electrically conducting composite materials of special purpose. Method of producing is carried out by exposing carbon nanotubes to a dispersion in a liquid medium, with subsequent removal of liquid medium. Medium used is a chlorine-containing organic solvent. Exposure involves mixing a dispersion of nanotubes with organosilicon liquid located between electrodes, wherein electric field intensity is 5–20 kV/cm, which is determined by formula E = U/d, where E is electric field intensity, kV/cm, U is voltage applied to electrodes, kV, d is distance between electrodes, cm.EFFECT: invention provides technological effectiveness of producing fibres from carbon nanotubes.1 cl, 5 ex
High modulus high strength uhmwpe fiber and method for its production // 2612714
FIELD: chemistry.SUBSTANCE: invention relates to high modulus high strength fiber made of ultrahigh molecular weight polyethylene (UHMWPE) and a method for its preparation. Methods are described for obtaining threads and multithread yarn from UHMW polyethylene (UHMWPE), as well as the yarn and products made thereof. Each method provides UHMWPE threads with strength of 45 to 60 grams/denier.EFFECT: invention provides an effective way to create yarn from ultrahigh molecular weight high strength polyethylene or with higher productivity on an industrial scale.10 cl, 6 ex
Protective material and protective products of such material // 2612696
FIELD: textile, paper.SUBSTANCE: protective material for work in the conditions of external influences, such as electromagnetic field radio frequency bands, electric field of industrial frequency, and switching and stepping voltage and/or electric arc, is made of conductive fabric composed of filaments on the basis of meta-aramid fibers based on poly m-phenylene isophthalamide and/or its derivatives and a stainless metal staple and/or monofilament fibers in a ratio of 70:30 to 30:70 pts. wt. respectively, with a density of 250 to 400 g/m2 and heat resistance at not less than 13 cal/cm2 minimum density. Stainless metal fiber for providing corrosive resistance is made of stainless iron-based steel alloy with an additive selected from a number of chromium, nickel, titanium, carbon, manganese, copper, boron, vanadium, niobium, aluminum, tungsten, molybdenum. The fabric is adapted to coloring by using an appropriate hue aramid fiber and a linen weaving (1/1) or broken twill (2/1 or 3/1) are usually used. The protective product is made in the form of a garment, or hat, or hood, or helmet, or screened helmet, or shoes, or protective cover, or shoe covers, or gloves, or mittens, or socks.EFFECT: invention allows for the possibility of wet washing without loss of protective properties and protect against electrical and thermal injuries when hitting an electric arc in a person.8 cl, 1 dwg
ethod for production of aromatic polyimide nanofiber based material // 2612280
FIELD: chemistry.SUBSTANCE: method is described for production of a polyimide nanofiber based material including electrospinning of polyamide acid solution in the solvent in which the solution containing not more than 12 wt % of polyamide acid in aprotonic solvent is used to obtain the film by the method of electrospinning through split draw die to the support; the film is removed from the support and dissolved, in the quantity ensuring polyamide acid content in the solution of 12-20 wt %, in the mixture aptoronic solvent : benzoid solvent with benzoid solvent content being 20-70 vol.%; the solution is supplied at room temperature through electrode- draw die to electric field with voltage of 15-35 kV; the material deposited on the anode is subjected to thermal treatment at a temperature of 370-420°C for 60 min; the target product consists of aromatic polyimide nanofibers with diameter of 50-700 nm and has decomposition temperature higher than 500°C in the inert medium in mixture.EFFECT: production of aromatic polyimide nanofiber based material using the method of electrospinning of polyamide acid at room temperature.6 dwg, 5 ex

Solvent-based methods for production of graphene nanoribbons // 2609915
FIELD: chemistry.SUBSTANCE: invention relates to chemical industry and nanotechnology. Plurality of carbon nanotubes is exposed to a source of alkali metal in presence of an aprotic solvent and in absence of protic solvent. Carbon nanotubes opened in a direction parallel to their longitudinal axes are obtained. To obtain non-functionalised graphene nanoribbons, opened carbon nanotubes are exposed to a protic solvent. To obtain functionalised graphene nanoribbons, opened carbon nanotubes are exposed to an electrophile. Obtained graphene nanoribbons have specific conductivity of 0.1–9,000 S/cm.EFFECT: invention can be used for production of composites and fibres for displays, deicing circuits, gas-permeable composites and screens.52 cl, 36 dwg, 6 ex, 1 tbl
Coloured in spinning purely aromatic polyamide meta-type fibre // 2609913
FIELD: textile.SUBSTANCE: invention relates to colored in spinning purely aromatic polyamide meta-type fibre, used as heat resistant and fire-resistant fibres preferably in field of protective clothes. Coloured in spinning purely aromatic polyamide meta-type fibre has residual solvent content of 0.1 wt% or less per total fibre weight.EFFECT: wherein colored in spinning purely aromatic polyamide meta-type fibre has higher resistance to decoloration and color fading under exposure to light and higher stability of dimensions at high temperature.5 cl, 1 tbl, 4 ex

Complex thread forming spinneret // 2608917
FIELD: manufacturing technology.SUBSTANCE: complex thread making spinneret has first surface and second surface parallel to first surface, and comprises plurality of spinning holes, wherein each spinning hole contains: inlet opening, tapered channel and cylindrical shaped capillary. All capillaries outlet sides are located in spinneret second surface plane, wherein spinneret comprises, at least, first group of spinning holes with capillaries and second group of spinning holes with capillaries, wherein second group of spinning holes capillaries have smaller L/D ratio, than first group of spinning holes capillaries, and all capillaries have same diameter, and all capillaries diameter is 100 mcm or less, so that complex thread, made with help of spinneret, has distribution of elementary threads of same diameter.EFFECT: according to invention, to reduce elementary threads breakage during complex thread molding, drawn with high drawing spinneret is used.14 cl, 1 dwg, 1 tbl, 2 ex
Barrier for spindles of a textile machine // 2607482
FIELD: textile and paper.SUBSTANCE: invention relates to textile industry and concerns noise-attenuating barrier for textile machines. Barrier for spindles of a textile machine comprises a metal casing installed using brackets on a spindle bar of the machine, on the inner surface of the metal casing there is a vibration-absorbing layer, made in the form of elastic sheet vibration-absorbing material with internal loss coefficient not lower than 0.2, or composite material, or plasticate of “Agat”, “Antivibrat”, “Schwim” type. Thickness of the vibration-absorbing layer arranged on plates 2…4 times exceeds thickness of the plates. Spindles turn from a belt drive and are secured on the spindle bar of the machine by means of elastic damping gaskets from elastomer. Ratio of their total stiffness to bending stiffness of the spindle bar is within optimal range of 0.01…0.1. Metal case is located in the zone of spindles along their row and is box-shaped, and covers both rows of spindles of the machine. Plates are arranged on the casing on its inner side and on both sides, top and bottom, are coated with vibration-absorbing layers with sound-absorbing layers arranged on them. On upper and lower planes of the casing there are process holes Z1 and Z2. Ratio of total area of F1 of the process holes to the total area of casing F is within optimal range of values F1/F=0.1…0.4. Sound-absorbing element of the barrier of spindles comprises a smooth surface and a perforated surface, between which a multilayer sound-absorbing structure is arranged, made in form of rigid and perforated walls, between which two layers are arranged: sound-reflecting layer, adjacent to rigid wall, and sound-absorbing layer, adjoining perforated wall. Layer of sound reflecting material is made with complex profile, consisting of evenly distributed hollow tetrahedrons, which enable to reflect sound waves incident in all directions. Perforated wall has the following perforation parameters: hole diameter – 3÷7 mm, perforation percentage – 10÷15 %. Holes can be made as holes of circular, triangular, square, rectangular or rhomboid profile. In case of non-circular holes, it is necessary to consider as nominal diameter maximum diameter of circle inscribed in polygon. Sound-absorbing material used is mineral wool on basalt base of “Rockwool” type, or mineral wool of “URSA” type, or basalt wool of P-75 type, or glass wool lined with glass felt, or foamed polymer, for example, polyethylene or polypropylene. Surface of fibrous sound absorbers is treated with special porous air-permeable paints (for example, “Acutex T”), or coated with air-permeable fabrics or nonwoven materials, for example, “Lutrasil”.EFFECT: invention provides higher efficiency of noise reduction.3 cl, 2 dwg

ethod to wash greasy wool, method to separate lanolin from said greasy wool, wool and lanolin obtainable by these methods // 2606788
FIELD: consumer goods industry.SUBSTANCE: invention relates to light industry. Method to wash wool containing lanolin and impurities, comprises providing a volume of an aqueous liquid at a temperature below melting temperature of lanolin, soaking wool in said volume of liquid, creating air bubbles in volume of liquid by injecting liquid containing air bubbles into volume using an injection nozzle, and allowing air bubbles to pass through wool to attach impurities, and removing wool from said volume.EFFECT: invention enables to obtain wool without "stable" odour.9 cl, 2 dwg, 2 ex

Fibre precursor for carbon fibres, carbon fibre and method of producing carbon fibre // 2605973
FIELD: chemistry.SUBSTANCE: invention relates to fibre precursor for carbon fibres, carbon fibre and a method of its production. Fibre precursor of carbon fibre contains a polymer of general formula (1): (1), where Ar1 is an aryl group, expressed by any structural formulae (1)-(5), and Ar2 is an aryl group, expressed by structural formula (6) or (7), except a combination, where Ar1 is a group, expressed by structural formula (3), and Ar2 is a group, expressed by structural formula (6), and combination, where Ar1 is a group, expressed by structural formula (1), and Ar2 is a group, expressed by structural formula (6): .EFFECT: technical result is obtaining carbon fibre with excellent mechanical strength without non-fusible treatment.8 cl, 10 dwg, 1 tbl, 2 ex
ethod of composite fibrous adsorbent producing // 2604620
FIELD: manufacturing technology.SUBSTANCE: invention relates to carbonic adsorbents production. Described is method of composite fibrous adsorbent production, characterized by that initial components taken are hydrolyzed lignin and polyacrylonitrile, making their mixed at ratio of 80:20 by weight, this mixture is placed into pyrolysis reactor, performing its blowdown by nitrogen flow, after that, mixture is heated in pyrolysis reactor at rate of temperature raising of 15 deg.·min-1 until mixture temperature of 800 °C, maintaining this temperature for 0.5 hours, stopped heating and performing cooling of carbonized fibers to room temperature under nitrogen at rate of its flow of 50 cm3·min-1.EFFECT: producing adsorbent based on wood processing wastes in large quantities, having higher heat resistance and strength.1 cl

achine for stapling bast-fibre crops // 2604016
FIELD: textile and paper.SUBSTANCE: invention relates to textile industry, namely to devices for stapling bast-fibre crops, and can be used in processing bast-fibre crops in different forms. Machine for stapling bast-fibre crops containing feed conveyor 1, feed rolls 2 to supply fibre into working chamber 3 in the form of a casing with slot 4 for feeding the material into the processing zone and with output 5 for removal of chopped strands, working member 6 made in the form of a plate with at least two sharpened cutting edges arranged in the same plane at an angle to the horizon, is equipped with two working members 6 in the form of plates arranged on one line relative to each other with minimum clearance between them.EFFECT: technical result is processing bast-fibre crips in different forms, higher efficiency, reducing the cost of the fibre.1 cl, 4 dwg

Casing for textile machine spindles // 2603951
FIELD: textile.SUBSTANCE: invention relates to textile industry and concerns textile machines noise-absorbing enclosure. Casing for textile machine spindles comprises enclosure with vibration and sound-absorbing layers attached on its inner surface and installed at its spindles level on machine spindles bearing pate along their row, enclosure is made in form of housing consisting of top and side plates, rigidly fixed to spindles bearing pate, and vertically arranged detachable cover, consisting of lower horizontal plate and vertical plate with slant, wherein thickness of placed on plates vibration-absorbing layer is in 2…4 times exceeds thickness of housing and cover plates, wherein casing sound absorbing enclosure is made in form of rigid and perforated walls, between which multilayer sound absorbing element is arranged, made in form of five layers, two of them, adjacent to walls, are sound-absorbing layers from materials with different density, while three central layers are combined, wherein axial layer is made sound-absorbing, and two symmetrically located, adjacent to it layers are made from sound reflecting material with complex shape, composed of evenly distributed hollow tetrahedrons, allowing to reflect sound waves incident in all directions, each of perforated walls has following perforation parameters: holes diameter - 3÷7 mm, perforation percentage 10 %÷15 %, wherein by form holes can be of circular, triangular, square, rectangular or rhomboid shape, wherein in case of non-circular holes, maximum diameter of circle inscribed into polygon shall be considered as nominal diameter, and plates from mineral wool on basalt base of “Rockwool” type are used as sound absorbing material, or from "URSA" mineral wool, or P-75 basalt wool, or a glass wool with a glass felt, herewith the sound absorbing element over its entire surface is lined with an acoustically transparent material, for example, EZ-100 glass fabric or "poviden" type polymer.EFFECT: technical result is increase in noise reduction efficiency.3 cl, 2 dwg

Threads made from completely aromatic polyimides with high uniformity of physical and mechanical properties and method for production thereof // 2603796
FIELD: chemistry.SUBSTANCE: invention relates to chemical engineering of fibre materials and threads made of completely aromatic polyimides with high uniformity of physical and mechanical properties. Method of producing threads involves synthesis of initial polyamide acid (PAA) by polycondensation of aromatic diamines and a dianhydride of pyromellitic acid in A medium of dimethylacetamide, moulding PAA threads using a wet method with subsequent stretch drawing, flushing, combined with application of imidisation catalyst, drying, as well as a step of thermal imidisation.EFFECT: invention provides process of producing complex polyimide fibres with specific breaking load of not less than 60 cN/tex, modulus of elasticity of not less than 12,000 MPa, breaking elongation 12-15 %, heat resistance of not less than 85 %, oxygen index of not less than 55 % and coefficient of variation of mechanical properties of not more than 5 %.6 cl, 2 tbl, 6 ex

Formation of conjugated protein by electrospinning // 2603794
FIELD: technological processes.SUBSTANCE: invention relates to a method of producing fibre from polysaccharide-conjugated milk whey protein by electro-spinning, which includes steps of preparing an aqueous solution, containing polysaccharide and milk whey protein, wherein said polysaccharide is present in concentration of 0.1 g/ml to about 5.0 g/ml, application to solution of voltage from 15 to 25 kV, collection of fibre on a composite plate.EFFECT: disclosed is a method of producing polysaccharide-conjugated milk whey protein by electro-spinning.23 cl, 29 dwg, 9 tbl

ethod of solid molded bodies or films producing // 2603364
FIELD: pulp and paper industry.SUBSTANCE: invention relates to method of solid cellulose molded bodies making, in particular films, from cellulose solution by extrusion, in particular, to polymer solutions or polymer liquids forming. Method of solid cellulose molded bodies producing from cellulose solution, NMMO (N-methyl-morpholine-N-oxide) and water by this solution extrusion through one or more extrusion holes under pressure and cellulose molded bodies curing in receiving bath, wherein solution is supplied between extrusion holes and receiving bath via air gap, is characterized by, that temperature of solution in extrusion holes is less than 105 °C and difference in pressure between pressure solution immediately before extrusion and after extrusion in air gap is 8-40 bar.EFFECT: method allows to improve spinning quality.34 cl, 5 dwg, 1 tbl

Low-pill polyester fibre // 2602883
FIELD: textile.SUBSTANCE: group of inventions relates to textile industry. Fibre is based on polyester, consisting of aromatic dicarboxylic acids and aliphatic diols. Fibre contains from 0.5 to 10 wt% of inorganic particles with size from 0.5 to 5 mcm. Particles are metal salts of first and second main groups of periodic table. Salts contain chlorides, fluorides, bromides, iodides, carbonates, phosphates, nitrates, hydrocarbonates, sulphites and mixed salts thereof. Polyester is extruded and moulded to produce filaments, drawn, twisted, fixed and cut to required length. Non-dyed raw fibre needs from 200 to 700 flex abrasion tours. Fibres have strength of 25 cN/tex.EFFECT: higher quality of fibre due to low piling, which is maintained at next stages.19 cl

Device for producing nanofibres, method of producing nanofibres and structure made of nanofibres // 2600903
FIELD: nanotechnology.SUBSTANCE: device for production of nanofibres 10 comprises: device 11 for injection of spinning solution comprising current-conducting nozzle 13 for injection of stock of spinning solution for producing nanofibres; electrode 14 spaced from nozzle 13; means 101 for generating voltage between nozzle 13 and 14 electrode; means 15 for feeding air jet arranged to direct air jet between nozzle 13 and 14 electrode; and a means for collection of nanofibres. Means 101 for generating voltage generates voltage so that nozzle 13 serves as a positive terminal, and electrode 14 serves as negative terminal. Whole surface of electrode 14 facing nozzle 13 is coated with coating 17 with dielectric, open on surface.EFFECT: dielectric, open on surface, has thickness of 0 8/10 mm or more.18 cl, 9 tbl, 17 ex, 33 dwg

Textile reinforcement comprising continuous aramid yarn // 2599673
FIELD: chemistry.SUBSTANCE: invention relates to polymer textile materials of special purpose and concerns textile reinforcement, comprising a continuous aramid yarn. Yarn has a finish containing mono-or dialkyl phosphate ester or a mixture thereof. Finish is free of compounds with alkoxy groups and comprises a mono- or dialkyl phosphate ester, has formula (I), in which R1 is a branched or straight C1-C15-alkyl, R2 is H, Li, Na, K or NH4 or branched or straight C1-C15-alkyl, and M denotes Li, Na, K or NH4. Textile reinforcement can be used to produce hoses, pipes, flexible pipes, fibre-optic cables, power cables, fiber-reinforced composites and articles with ballistic resistance.EFFECT: invention provides creation of efficient technology of finishing continuous aramid yarn for production of quality textile reinforcement.15 cl, 1 dwg, 6 ex, 17 tbl

ethod of producing bast fibre // 2598834
FIELD: textile.SUBSTANCE: invention relates to primary processing of bast-fibre crops to produce short and single-type bast fibre as raw material for textile industry and can be used in processing bast-fibre crops in rolls, and in other package.EFFECT: technical result is reduction of weight ratio of chaff and foreign impurities in obtained bast fibre, high efficiency of processing and is achieved by that method of producing bast fibre, which involves feeding material into processing zone under action of air flow with creation of vibration of material therein and reduction of forces of interaction of stems, their sections, fibrous strands, breaking of structure of stems and separating chaff from fibres, separation of bast fibre and chaff in two steps, first step of which includes enrichment chaff-fibre mass due to removal of chaff, based on differences of aerodynamic properties of bast fibre and chaff at interaction with air jet, stalks of bast-fibre crops are first crushed by separation of separate portions of mass of stems, and then breakdown of structure of stems and separation of chaff from fibre by coarse and fine scutching.1 cl, 1 dwg

ethod of producing single-type bast fibre // 2598833
FIELD: textile.SUBSTANCE: invention relates to primary processing bast-fibre crops in order to obtain a single-type bast fibre as a raw material for textile industry and can be used in processing bast-fibre crops both in rolls and in square or rectangular piles. It is implemented by that in the proposed method of producing a single-type bast fibre, which involves feeding the material into the processing zone under the action of an air flow with creation of the material vibration therein and reduction of forces of interaction of stems, their sections, fibrous strands, destruction of the stems structure and separating chaff from fibers, separation of bast fibres and the chaff in two steps. At the first step the chaff-and-fibre mass is enriched owing to removing the chaff based on differences of aerodynamic properties of bast fibre and the chaff at interaction with an air jet, bast crops in a roll are subjected to cutting into rectangular portions, their regular feeding, pressing and stapling by cutting the chaff-and-fibre mixture in them before separating the fibres and the chaff, crushing and tillage.EFFECT: technical result is reduction of the chaff and foreign impurities weight ratio in the obtained single-type bast fibre, higher efficiency of processing, production of a single-type bast fibre with adjustable in a wide range length.1 cl, 2 dwg

Devices and methods for producing fibres // 2598584
FIELD: textile and paper.SUBSTANCE: method of producing fibres includes the stages, in which a composition containing one or more fluoropolymers is placed into a case of a device for producing fibres and the device is brought into rotation with a speed sufficient to eject the material from the device for producing fibres to form fluoropolymer microfibres and/or nanofibres.EFFECT: proposed is a method of producing fibres.21 cl, 55 dwg

ethod of producing hollow ceramic fibres // 2598262
FIELD: technological processes.SUBSTANCE: invention relates to ceramic materials, particularly to producing hollow ceramic fibres used for production of capillaries, membranes, filters, separators in batteries compartments and composite materials. Due to their chemical inertia and high heat resistance such ceramic fibres can be used while operating in aggressive media and at high temperature of the working zone. Carbon fibres in the form of bundles or felt is washed with a mixture of acetone and alcohol in ratio of 1:1, then is coated with a hydroxide (aluminium, zirconium or titanium) layer of metal by impregnation in appropriate hydroxide ash. Hydroxide is dried at temperature of ~60 °C and annealed at 250-300 °C for 20-30 minutes to produce carbon-ceramic fibre. Procedure for impregnation-drying-annealing is carried out at least 3 times. Carbon core of the composite fibre is burnt out in air at temperature of 800-1,000 °C. Inner diameter of the obtained fibres corresponds to the diameter of the used carbon fibre and is equal to 5-7 mcm in examples given in the description. Structure of ceramic fibers repeats an outer structure of a carbon precursor, and therefore it is possible to produce bundles and felt from hollow ceramic fibres.EFFECT: simple and accelerated method of producing hollow ceramic fibres without using special equipment and aggressive chemical agents.1 cl, 15 ex, 8 dwg

Copolymer and synthesis methods thereof // 2597591
FIELD: chemistry.SUBSTANCE: present invention concerns yarns comprising copolymer derived from copolymerisation of para-phenylenediamine, 5(6)-amino-2-(p-aminophenyl)benzimidazole; and terephthaloyl dichloride, where ratio of moles of 5(6)-amino-2-(p-aminophenyl)benzimidazole to moles of para-phenylenediamine is 30/70 to 85/15; yarn having a sulphur content greater than 0.1 %; and hydrolytic strength retention of yarn is greater than 60 %.EFFECT: invention discloses a yarn, containing copolymer, as well as methods of producing such types of yarn.21 cl, 2 tbl, 2 dwg
ethod for assessing process value of fibre flax stems // 2597552
FIELD: agriculture.SUBSTANCE: invention relates to flax-growing sector agroindustrial complex, namely, to methods for assessment of process value of fibre flax stems on the first stages of selection. Method for assessing process value of fibre flax stems in selection work involves preparation of stems, determining the length of internodes, technical length and diameter of the stem, based on analysis of signs of separation of the best samples, additional determination of content of adipocerous substances in stems, the difference of diameters of top and root parts of technical stem length, and for the best samples by process value are consequently taken stems with maximum values of adipoceratous substances and minimum difference in diameters.EFFECT: technical result consists in creation of method for assessing the process value of fibre flax stems in single stems or small samples, which provides increase in information content of analysis results, which enables to consider, except for prediction of potential spinning capability of fibre contained in them, process value of stems with account of processes for preparation of treated plant fibres by due-retting and primary processing.1 cl

Neutralised copolymer crumb and methods of production thereof // 2597365
FIELD: technological processes.SUBSTANCE: invention relates to copolymer crumb, to production of neutralised copolymer chips, to method of making aramid yarn and yarn. Method for production of neutralised copolymer crumb consists in the fact that at first is obtained copolymer crumb copolymerisation of para-phenylenediamine, 5(6)-amino-2-(p-aminophenyl)benzimidazole and terephthaloyldichloride. Obtained copolymer crumb comprises by-product or admixture in the form of acid. Then copolymer crumb reacts with a base to form a salt of said acid. Reaction is carried out during the period of time sufficient to ensure production of a polymer, having content of titratable acid less than 0.4 mol/kg. Then, at least part of said salt is removed to form particles of neutralised copolymer, having characteristic viscosity not less than 3 dl/g. Method of forming aramid yarn consists in the fact that a copolymer crumb is dissolved in sulphuric acid. Obtained spin solution is spun through a draw plate to obtain one or several elementary threads.EFFECT: invention significantly reduces formation of bubbles and prevents the odor of HCl from occurring in spinning solution, as well as enhances the quality of yarn.19 cl, 1 dwg, 1 tbl, 2 ex

ethod of producing carbon fibre materials // 2596752
FIELD: chemistry.SUBSTANCE: invention relates to chemical engineering of fibre materials and a method of producing carbon fibre materials. Initial cellulose fibrous material is treated with a catalyst solution containing dibasic ammonium phosphate, ammonium chloride and sodium chloride, followed by drying of fibrous material, its thermally-relaxing, carbonization and graphitation at high temperature. Before the drying stage the initial material is further treated with solution containing nano-dispersed particles of metal, selected from group: silver, iron, copper, nickel, cobalt, in amount of 0.05-3.5 wt%, with particle size 1-50 nm. Material containing chemical elements in an amount of (ppb, 1×10-9 g/l): arsenic 15-60, lead 200-1,000, cadmium 15-250, chrome 50-250, cobalt 15-100, copper 100-1,200, nickel 20-250, mercury 0.002-0.1 is used as an initial material. Further treatment is carried out in presence of a stabiliser, nano-dispersed particles.EFFECT: invention provides high strength of synthesized carbon fibre.3 cl, 5 tbl, 11 ex

Fire-resistant fibre, yarn and fabric made therefrom // 2596738
FIELD: chemistry; textile and paper.SUBSTANCE: invention relates to chemical engineering of textile materials and fire-resistant fibres, yarn and fabric therefrom. Fire-resistant staple spun yarn comprises at least one fire-resistant fibre containing partially aromatic polyamide and non-halogenated fire retardant, and additionally contains additional fibre.EFFECT: considered fibre and yarn when mixed with other fire-resistant fibres do not exhibit dangerous “scaffolding effect”, provide good fire resistance, prevent dripping and adhesion, are wear-resistant and are suitable for processing into wear-resistant, durable fire-resistant fabric, canvas or piece of clothing.22 cl, 14 dwg, 2 tbl

Copolymer and synthesis methods thereof // 2596219
FIELD: chemistry.SUBSTANCE: invention relates to chemical engineering of fibre polymer materials and yarns and fibres, consisting of copolymer fibres, and methods for preparing them. Yarn comprising copolymer derived from copolymerisation of para-phenylenediamine, 5(6)-amino-2-(p-aminophenyl)benzimidazole, and terephthaloyl dichloride, wherein ratio of moles of 5(6)-amino-2-(p-aminophenyl)benzimidazole to moles of para- phenylenediamine is 30/70 to 85/15; said yarn having a sulphur content greater than 0.1 % and having an effective polymer cation to sulphur content molar ratio of at least 0.3, additional aspects of present invention relates to methods of producing said types of yarn.EFFECT: invention provides an efficient method of producing copolymer fibres with improved physical properties.13 cl, 2 dwg, 2 tbl, 5 ex

ethod of producing multilayer fibre materials and device therefor // 2595992
FIELD: technological processes.SUBSTANCE: method of producing multilayer fibre materials comprises transfer thereof using external air streams and creation of internal air streams directed to zone of forming fibre layers with separation thereof into components, wherein external air streams are directed horizontally by changing path of fibre material, wherein path of movement of upper component of fibre material is increased in relation to path of lower component of fibre material; path of obtained layers is made different, after which layers of fibre material are connected with a layer of cloth on both sides; and device for producing multilayer fibre materials comprises a hopper, feeding rollers, feeding cylinders, a saw-toothed drum with mote knife and distribution chamber with a unit for forming fibre layers made of two pairs of mesh drums and conveyors, wherein behind saw-toothed drum, installed on outlet of hopper, there are horizontally installed additional saw-toothed drums, under outlet saw-toothed drum there is a transporting corridor of height h=8…12 mm; distribution chamber is presented in form of a polygon in cross section with controlling dust removal zone, arranged in upper angle of polygon, wherein side of upper angle of polygon are located at angles β=20…30° and γ=30…45° to horizontal line; unit for forming fibre layers is made in form of paired mesh drums, divided by side wall of polygon, wherein side wall is located at an angle λ= 55…60° to horizontal, and mesh drums are spaced apart so that ratio of distances from zone of removal of outlet saw-toothed drum to upper pair of mesh drums to distance from zone of removal of outlet saw-toothed drum to lower pair of mesh drums is 1.1-1.4; conveyor upper pair of mesh drums is bent at an obtuse angle; between conveyors installed at outlet of both pairs of mesh drums there is a bracket with freely rotating roll of cloth, and behind conveyors and bracket with roll of cloth there is a forming conveyor; all saw-toothed drums, apart from outlet, comprise control mote knives with pneumatic system for removal, and hopper is made in form of confuser.EFFECT: group of inventions broadens process and technological capabilities of device and method by obtaining new textile materials with simultaneous improve of quality factors thereof.3 cl, 2 dwg

Oxidation furnace // 2594415
FIELD: metallurgy.SUBSTANCE: invention relates to an oxidative furnace for processing fibres and for producing hydrocarbon fibres. Furnace (1) has located inside housing (2) a process chamber, blowing device (13), exhaust device (14), one fan, which pumps out hot air through blowing device (13), and being in hot flow of pumped air heating device. Run-around rolls (24, 25, 26, 32) direct fibres (20) through a process chamber located nearby in zigzag manner in form of a carpet. Fibre mat (20) forms a plane between opposite bypass rollers (24, 25, 26). Means (33) provide crossing of air plane formed by fibre mat (20), at angle other than 0° and from 90°, so that throughout between blower (13) and exhaust device (14, 15) there is air essentially of same temperature.EFFECT: invention improves heat exchange between hot oxidative air and fibres.16 cl, 10 dwg

ethod of producing lignin fibres // 2591939
FIELD: chemistry. SUBSTANCE: invention relates to chemical engineering of fibre materials and a method of making continuous lignin fibre. Continuous lignin fibre is obtained from alkali lignin from softwood and/or hardwood. Lignin fibre can be subjected to further treatment for production of structural carbon fibre. EFFECT: invention enables to produce lignin fibre from renewable sources, such as coniferous and deciduous wood, as precursor for producing carbon fibre. 18 cl, 1 dwg, 37 ex

Active agent-containing fibrous structure with multiple areas // 2591704
FIELD: textile and paper.SUBSTANCE: invention describes a fibrous structure (pos. 120) intended for treatment of item made of fabric, which contains threads, where threads comprise one or more threads forming materials, wherein at least one of said one or more forming threads materials contains a hydroxyl polymer and one or more active fabric care agents, released from threads in conditions of expected application, wherein said fibrous structure additionally contains at least a region (pos. 122), multiple separate zones (pos. 124) and transition region (pos. 135), transition area borders with mesh area and multiple separate zones, and transition region is characterised by width of about 100 mcm to approximately 500 mcm. Invention also discloses versions of fibrous structure for treatment of items from tissue, method of producing fibrous structure and method of tissue, by application of fibrous structure.EFFECT: production of fibrous structure, which is flexible, not susceptible to break with ease of use, with sufficient separation of detergent composition in use.28 cl, 10 tbl, 8 ex, 17 dwg

Polymer materials // 2590567
FIELD: chemistry.SUBSTANCE: invention relates to polymer materials, particularly, to introduction of additives into polymer materials. Method of introducing an additive into a polymeric material comprises selecting a liquid composition comprising additive, a carrier and an active compound added to increase melt viscosity of polymeric material. Polymeric material is polyester. Active compound selected from anhydride, epoxide, melamine, oxazoline, oxazolinone, lactam, carbodiimide, polyepoxy, isocyanate, polyacyllactam and phophonate. Liquid composition is brought into contact with polymeric material in device for melt. Rotary-cavity mixer is used. Fibre is preferably obtained from polymeric material.EFFECT: invention simplifies method, enables to obtain a product with improved properties due to recovery of pressure at extrusion and excluding decomposition of polymer and carrier.22 cl, 1 dwg, 5 tbl, 8 ex

Active agent-containing fibrous structure with multiple areas with different densities // 2588573
FIELD: textile.SUBSTANCE: invention discloses a fibrous structure (pos. 20) intended for treatment of article made of fabric, which includes threads, where threads comprise one or more threads forming materials, wherein at least one of said one or more forming threads materials contains a hydroxyl polymer, and one or more active fabric care agents, released from threads in conditions of expected application, fibrous structure additionally contains: (a) a continuous mesh area (pos. 22), mesh area is characterised by first mean density; and (b) a plurality of separate zones (pos. 24), characterised by second mean density, where separate zones are distributed over mesh area, and wherein said first mean density and second mean density are different. Also disclosed is a version of fibrous structure, method of producing fibrous structure and method of treating article made of fabric, using fibrous structure.EFFECT: technical result is obtaining a fibrous structure, which is flexible, non susceptible to breaking with easy handling, with sufficient release of detergent composition in use.31 cl, 18 dwg, 10 tbl, 8 ex

odified polylactic acid fibres // 2588235
FIELD: chemistry; technological processes.SUBSTANCE: invention relates to chemical technology of producing biodegradable fibres and concerns modified polylactic acid fibres. Method of producing polylactic acid fibres involves mixing in a melt polylactic acid with polyepoxide modifier and a polymer reinforcing additive to form a thermoplastic composition, wherein reinforcing additive is dispersed in form of domains of discrete phase in a continuous polylactic acid phase; subsequent extrusion of thermoplastic composition at temperature higher than approximately 230 °C, which contributes to reaction of polyepoxide modifier with polylactic acid; and passing reacted composition through extrusion head to form fibre.EFFECT: invention enables to obtain fibre with good mechanical properties, appearing during and after spinning from melt.22 cl, 5 dwg, 10 tbl, 55 ex

Device for separate twisting and winding yarn // 2587372
FIELD: machine building.SUBSTANCE: device is implemented as follows: power supply unit, for example drawing tool, supplies broken thread in torsion zone, where it is rolled into yarn, envelopes outer surface of a cap, rotating together with a spindle, and is transmitted to a receiving cartridge. Section of yarn from lower surface of cap to receiving cartridge periodically contacts with brake device, "creeping" from spindle, wound at each revolution of cylinder of yarn. Braking device is a "hill" with flat front slope, located in an area between edge of cap and point of winding yarn perpendicular to direction of yarn. Hill moves in horizontal and vertical directions, thus providing optimum conditions of twisting and winding. Synchronisation of rotation of spindle and cap is carried out by spline joint. High efficiency of device is provided due to gyroscopic effect, which reduces lateral load on bearing axis. Stabilisation of process is ensured by placing in upper part of cap teeth for non-cylinder spinning.EFFECT: invention can be used in textile industry for producing mainly yarn and other articles.7 cl, 3 dwg

ethod of producing surface-active fibrous carbon material // 2587095
FIELD: technological processes.SUBSTANCE: invention can be used for production of erosion-resistant parts of solid-propellant rocket engines (SPRE) nozzle unit. Surface-active fibrous carbon material is obtained by treating carbon fabric, made of viscose fibres, with 5 % solution of iron thiocyanate in distilled water. Then, it is impregnated with binder.EFFECT: method is simple and improves physical and mechanical properties of polymer-composite material.1 cl, 4 dwg

Acoustic screen for drive of spindles // 2586654
FIELD: acoustics.SUBSTANCE: invention relates to industrial acoustics, particularly, to broadband acoustic suppression. Acoustic screen for drive of spindles comprises a rigid wall, on which there is a layer of sound-absorbing material. Stiff wall is box-like shape enveloping drive spindle, and has process holes for heat removal. Fastened to the rigid wall additionally is element in the form of smooth and perforated walls. Located between the walls is sound-absorbing material arranged in two layers, one of which is harder, continuous and shaped, and the other is soft, discontinuous and placed in the focus of the sound reflecting surfaces of the first layer. Solid shaped layer of sound-absorbing material is made from material with sound reflection factor higher than that of sound absorption. Profiles are formed by spherical surfaces, connected to each other so that in each profile a solid dome profile is created, focusing the reflected sound on the same soft acoustic absorber, which is located in focus of the solid shaped layer made in the form of revolving bodies, for example in the form of balls, revolving ellipsoids, and is attached by means of rods parallel to the perforated wall and rigidly connected with smooth wall by vertical links.EFFECT: higher efficiency of noise suppression due to improvement of sound absorption coefficient by increasing noise absorption surfaces while maintaining overall dimensions.1 cl, 2 dwg

Fibres, tapes and monofilaments based on copolymers of ethylene and alpha-olefins // 2586221
FIELD: textile industry.SUBSTANCE: invention relates to articles in form of fibre, tape or filament made from a polyethylene composition which includes a copolymer of ethylene and 1-hexene obtained by polymerisation in presence of a metallocene catalyst system in a gaseous medium. Molar ratio of hexene/ethylene in copolymer of ethylene and 1-hexene assumes following values: 0.0015, 0.0022, 0.0029 and 0.0045. EFFECT: fibres, tapes or filaments according to invention exhibit improved tensile properties, expressed as a balance between tenacity and elongation at break, and well suited for manufacture of articles such as artificial grass, woven and nonwoven fabrics, ropes, cordages, articles for making nets and flexible intermediate bulk containers.24 cl, 1 dwg, 7 tbl
ethod of obtaining antistatic polypropylene fibre with improved mechanical properties // 2585667
FIELD: machine building.SUBSTANCE: invention relates to method of obtaining antistatic polypropylene fibres with improved mechanical properties, which can be used in machine building, chemical, electrical engineering and light industry. Proposed method consists in fact that extruded fibres based on polypropylene (PP) filled with carbon nano particles, are subjected to eightfold orientation drawing. Drawing is carried out in two stages: at first fibre is drawn in four times, then two times at temperature of 150 °C.EFFECT: invention allows to produce polypropylene composite fibres with improved physical and mechanical properties.4 cl, 2 tbl

Oxidation furnace // 2585644
FIELD: metallurgy.SUBSTANCE: invention relates to an oxidative furnace for oxidative treatment of fibres, primarily for making carbon fibres. Oxidative furnace contains a body which, except for passage areas for hydrocarbon fibres, is gas-tight, technological chamber located inside housing, a device for supply of hot air into chamber, deflecting rollers that flank said process chamber and fibre through said process chamber located nearby zigzag in form of a mat, fibre mat forms between opposite deflecting rollers one plane. Air supply device is made so that hot air is directed to opposite process chamber side of deflecting rollers so that hot air flows around corresponding deflecting roller and fibre until entry input into said process chamber.EFFECT: invention provides high positive energy balance.16 cl, 15 dwg
ethod of introducing additives into polymer // 2585003
FIELD: chemistry.SUBSTANCE: this invention relates to high molecular compounds. In the method of introducing additives into polymers, a polymer product of an oblong shape is drawn out of amorphous or semicrystalline oriented, non-oriented or partly oriented polymer in a direct aqueous emulsion of oil-in-water containing water in an extended phase and physically active liquid medium emulsified in water (the dispersed phase) which is not mixed with water at a temperature of drawing. Amount of physically active emulsified liquid medium must be not less than 2 %. Drawing is conducted at a deformation of not less than 2 %.EFFECT: invention simplifies the method of introducing additives into the polymers and broadens the scope of application by spreading to the admixtures which are water-soluble but poorly or not soluble in water-based organic solvents.7 cl, 3 ex
ethod of introducing additives into polymer // 2585001
FIELD: chemistry.SUBSTANCE: this invention relates to high-molecular compounds and can be used in the textile industry, microelectronics, sensors optochemical as incombustible polymeric materials in the manufacture of special purpose products. Method of introduction of additives into polymers comprises drawing of elongated polymeric article of amorphous or semicrystalline oriented, non-oriented or partly oriented polymer in an aqueous emulsion of oil-in-water emulsion comprising water as the continuous phase and active liquid environment emulsified in water physically immiscible with water at a temperature of the drawing as a dispersion medium. Wherein the admixture is dissolved in the liquid medium is physically active. Amount of physical activity in the emulsified should be at least 2 vol.%.EFFECT: invention simplifies the known method and expands its scope by extending to the admixture, soluble in organic solvents, water-immiscible.7 cl, 5 ex

ethod and device for application of liquid polymer matrix on fibre-forming strings // 2584520
FIELD: technological processes.SUBSTANCE: invention relates to method and device for application of liquid polymer matrix to active fiber forming zone string fibre-forming element of fibre-forming electrode by means of causing agent making return motion along active zone fiber forming strings in device for production of nano-fibers by electrostatic process fiber forming of liquid polymer matrix in electric field created high-intensity between at least one fiber forming electrode and opposite precipitation electrode. Liquid polymer matrix is applied on string along its whole circumference without contact with gaseous medium in space fiber forming, in which spreading agent makes return motion, at that, when string of causing agent is limited by thickness of layer of liquid polymer matrix on string, and after its exit from causing agent instantly is launched process of electrostatic fiber forming of liquid polymer matrix, deposited on string.EFFECT: disclosed is method and device for application of liquid polymer matrix to active fiber forming zone string fibre-forming element of fibre-forming electrode.24 cl, 14 dwg

ethod of separating layer of stems of flax fibre into portions // 2584123
FIELD: agriculture.SUBSTANCE: invention relates to flax growing sector agroindustrial complex, namely to methods of forming portions of fibre flax stems in primary processing. Method of separation into portions of layer of stems of fibre flax, involving feeding layer, its point puncture, fixation of stems layer and separated portion, simultaneously to both sides across width of layer separation of formed portion stems and stems layer, outlet of separated portion, separation of stems along width is carried out from centre of puncture along circular trajectory.EFFECT: elimination of simultaneous communication of stems with layer and detachable portion, preservation of structural parameters and reduction of destructive actions on separation stems, which improves quality of separation stems layer of stems formed portion and improves conditions of further technological processes.1 cl, 1 dwg
 
2551349.
Up!