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Device for forming layer of stems of bast-fibre crops Device for forming a layer of stems of bast-fibre crops comprises metering discs with the clutch, the feeding discs and a few pairs of thinning discs rotating at different speeds, the sensor of control of the layer parameters and the controller of change the modes of operation. According to the invention the sensor is located in front of the metering discs to control the angular disorientation of the stems, the clutch is controlled by the amount of torque on the shaft of the metering discs, and the controller is connected to the system of synchronous control of the ratio of rotational speed of the thinning discs and the torque on the shaft of the metering discs. The result of the claimed invention is to create a layer with the constant density and the lowest possible angular disorientation of stems, which a layer has before layer-forming machine regardless of existing change in this parameter. |
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Method of strengthening carbon fibre Method includes impregnation of carbon fibre with a C60 solution or with a colloid solution (sol) of fullerene-containing soot or black. Activation of the C60 fullerene or particles of fullerene-containing soot or black, applied on a carbon fibre, by irradiation, can be additionally performed. |
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Method of obtaining antimicrobial copper-containing cellulose material Invention relates to technology of production of antimicrobial copper-containing cellulose materials and can be used in the textile industry. A cellulose matrix is processed with water dispersion of copper particles with their concentration of 0.025-1.28 wt %. Dispersion is obtained by mixing an alkaline extract of bast fibres with a copper salt solution and with a reductant solution and standing of the said mixture at a temperature from room to 95°C for 10-60 min. A concentration of the alkaline extract of the bast fibres in the dispersion constitutes 10-80 wt %. Processing the cellulose material with water dispersion of copper particles is carried out by impregnation or aerosol application. As the reductant used are taken separately or in a combination with each other compounds, selected from the group of reductants, capable of reducing copper ions, for instance, sodium borohydride, rongalite, sodium thiosulphate, hydrazine sulphate. As the copper salt, copper sulphate, chloride, acetate or nitrate is used. In obtaining water dispersion of copper particles a ratio of the reductant and the copper salt concentrations constitutes 1:1-1:2.5. |
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Method of producing synthetic fibres Invention relates to the technology of producing synthetic fibres with high chemical resistance and water-repellent properties and low coefficient of friction. The method involves forming fibres from a molten polymer, depositing a brightening preparation, orientation drawing and heat fixing. The brightening preparation is deposited on a hot surface of freshly moulded fibres simultaneously with an aqueous suspension of polytetrafluoroethylene with concentration of 3-60 g/l. Orientation drawing is carried out with a repetition factor of 3-15. |
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Synthetic fibres with high chemical resistance and low coefficient of friction Invention relates to the technology of producing synthetic fibres with high chemical resistance and water-repellent properties and low coefficient of friction, and can be used in chemical industry. The fibre is a polymer matrix whose surface is coated with a layer of polytetrafluoroethylene with thickness of 0.5-6 mcm. The polymer matrix is made of different thermoplastic polymers. |
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Method of separation of stems of bast crops for chaff, fibres and impurities In implementation of this method the stems of mowed bast crop is passed through at least one pair comprising a means of feeding and destruction of the stem, and a perforated cylinder, the central axis of which is inclined relative to the ground surface. The milled chaff is collected under the side surface of the perforated cylinder, and the fibres are discharged from the perforated cylinder through the end part opposite to the loading area. |
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Method of complex processing long stems of bast crop During harvesting bast crop the green mass is separated from the stems, the stems are mowed, the mowed stems are separated into segments, the segments of the mowed bast crop are passed through at least one pair comprising a means of feeding and destruction of the stem, and a perforated cylinder, the central axis of which is inclined relative to the ground surface. The milled chaff is collected under the side surface of the perforated cylinder, and the fibres are discharged from the perforated cylinder through the end part opposite to the loading area. |
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Bearing and loading upper roller bracket of exhaust mechanism of spinning machine Present invention relates to the textile industry, in particular the exhaust mechanism of the spinning machine. The precast bearing and loading bracket of the upper rollers of the exhaust mechanism of the spinning machine, having a downwardly open U-shaped bracket in which at least one slider is located, comprising a loaded element, and a holder for fixing the upper roller, and the adjusting and fixing device by which the slider can be moved longitudinally relative to the bracket and positioned on the upper side of the bracket, and for locking the slider in the bracket of the U-shaped section with the locking of rotation around its vertical axis the slider in its fixed position is adjacent at least to one of its lateral surfaces, to at least one inner lateral surface of the bracket, characterised in that the radius of the inscribed circle formed on the inner side of the bracket, at least in one transition area of the upper side in the neighbouring lateral surface is smaller than the radius of the circumscribed circle formed by the corresponding transition of the upper side to the side wall of the slider and that the slider has means interacting with the bracket so that the slider - in setting specific installation in the bracket by adjusting and fixing device is adjacent itself to the neighbouring one with the radius of the circumscribed circle of the inner lateral surface of the bracket. |
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Method of carbonisation of viscose fibrous materials in process of obtaining carbon fibres Invention relates to chemical technology, in particular to processes of carbonisation of fibrous viscose materials, and can be used in production of graphitised fibrous materials, used as filling agents of composite materials; electrodes; flexible electric heaters; filters of aggressive media; in products for sport and medical purposes, etc. The material is preliminarily subjected to relaxation processing. The obtained material, which contains a pyrolysis catalyst, is continuously transported through zones of carbonisation heating. Carbonisation is carried out to 320-360°C in not less than three zones of heating, heat- and gas-isolated one from another by transporting material with inclination from bottom to top, with increase of heating temperature from 160-200°C in the first zone by 40-60°C in each next zone of heating, in comparison with the previous one. Volatile products are simultaneously removed from the said zones into the evacuation zone, heat- and gas-isolated from the external environment and located above the heating zones and connected with them via a perforated wall. Temperature in the evacuation zone of volatile substances is set by 5-15°C higher than temperatures of the respective heating zones, temperature of the output branch piece being 5-15°C above the maximum temperature of carbonisation. |
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Production line of fibre (reinforcement elements) from polymer mass Production line of fibre from polymer mass in the process direction includes an extruder, an extrusion head for formation of a thread from polymer mass, which has a cross section of the specified shape, a thread cooling bath with cooling liquid, a withdrawal-roll set containing at least one upper roll and one lower roll with S-shaped threading, a thermal plastification chamber, the main tension set containing at least one upper roll and one lower roll with S-shaped threading between them, main thread drawing zone, a corrugating device and a cutting mechanism for thread cutting into equal pieces - fibre. The line includes an additional tension set containing at least one upper roll and one lower roll with S-shaped threading between them, which is installed after the main tension set, an additional thread drawing zone formed between the main tension set and the additional tension set, heaters for heating of the withdrawal-roll set, heaters for heating of the thermal plastification chamber, heaters for heating of the main tension set, as well as fans with outlet nozzles for removal of residual moisture from thread, which are installed in a zone between the withdrawal-roll set and the thermal plastification chamber. |
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Method and device for production of formed products Invention relates to production of fibres from reproducible stock, particularly, from cellulose and to device to this end. This method consists in mixing said reproducible stock with solvent to get spin dope. Then, solvent is removed, at least partially, from said mix to feed spin dope to spinning device. Spin dope is diluted with solvent before spinning. Proposed device comprises mixing reactor and spin dope spinner and mixer arranged there between to decreased spin dope viscosity. |
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Device and method of fibre strand cutting Fibre strands are cut to separate glass fibre segments of preset length to be dispersed in ordered manner. Fibre strand cutter comprises the form with base and discharge load, mechanism to feed fibre strand in said form and to displace it there along. Strand feed mechanism comprises first feed screw arranged along first side of said form and second feed screw arranged along second opposite side of said form. This cutter comprises extra third and fourth feed screws, first and second grinding wheels. Third and fourth feed screws are arranged along the form between, at least partially, first and second feed screws nearby aforesaid discharge end. Proposed method comprises the following jobs: feed of continuous strand to the form base end, displacement of said continuous strand along said form from said base end to discharge end and cutting said continuous strand to separate segments of preset length using aforesaid first and second grinding wheels. |
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Sensor of linear density of card sliver and method of its grading for feeding to draw frame Method of sorting strip for feeding to the draw frame with carded spinning system comprises folding of several strips, control of the linear density and stretching with further transition of the strip on the production line. According to the invention, at the stage of transportation of the card sliver from the carding machine to the draw frame the selection of the strip batches is carried out on the database formed from the signals from the sensor of the carding machine, which characterises the average linear density of the strip in each basin, with constant comparison of value of the required linear density of the strip on the draw frame and the total density of the strips, required for its production. The sensor of linear density of the card sliver comprises oppositely located perpendicular to the direction of the strip in the channel, the transmitter and receiver of the optical signal, which outputs are connected to the computing unit. According to the invention the channel for the strip in the sensor housing has a variable diameter which at the inlet of the strip is configured wider with a computing unit located around it, and tapered at the outlet, with a measuring unit located in it, consisting of a transmitter and a receiver, each of which is provided with temperature sensing elements. |
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Method of manufacturing multitude of highly strong, high-modulus threads from aromatic polyamide Method includes extrusion of, at least, 15 wt % acidic acid of aromatic polyamide through linearly located draw plate holes; passing thread the base through layer of non-coagulating flow medium into coagulating bath; passing thread cloth through spinning tube, injection of additional coagulating liquid near threads downward at angle from 15° to 75° with respect to threads at constant rate, constituting approximately 50-100% of the rate of threads, movement of supplied coagulating liquid down together with the base of threads through spinning tube into coagulating bath. Tube has elongated transverse section and contains, at least, two opposite sides, parallel to the base of threads, with the length of the sides being, at least, equal to the width of the base of threads. Coagulating liquid is injected through injector channel from any one side of spinning tube, parallel to the base of threads, where injector channel has, at least, the same width as the base of threads. |
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Device for release broken thread of flyer frame Device for release broken thread of flyer frame comprises a drawing device made of several drawing pairs, comprising corrugated cylinders, pressure rollers, and means for adjusting the arc of flow-around by the broken thread of the delivery roller made in the form of contact rollers and rolls with grooves located in their central part on working surfaces opposite each other. The rollers are mounted on the rod placed in the front part of the folding lever of load of the drawing device with the ability of reciprocating motion in it, at that the roll and the roller of the adjustment means of the arc of flow-around by the broken thread of the delivery roller are mounted with the ability to flow-around the roller by the yarn. According to the invention the rod is made T-shaped, on which horizontal branches the cylindrical rollers are fixed, coupled with the rolls mounted in a spring-loaded sleeve lugs, located on the vertical part of the T-shaped rod. The working surface of the rollers and the rolls is made of composite materials with a low coefficient of friction, which helps to reduce the friction of the broken thread on them. To move the T-shaped rod on the side surface of the folding lever of load of the drawing device, in its front part, a knob is mounted. |
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Method of producing polyacrylonitrile fibre and method of producing carbon fibre Method includes a spinning process, first drawing, drying and second drawing. Second drawing includes any process from (a)-(c): (a) drawing on air, where temperature of the thread from its point of separation on a hot roller to the point of first contact on the next roller is 130°C or higher, (b) drawing, where the distance from the point of separation of the thread on a hot roller to the point of its first contact on the next roller is equal to or less than 20 cm, (c) drawing in the drawing zone of a hot plate, where the hot plate is situated between two rollers, one of which is a heating roller which is mounted in front of the drawing zone of the hot plate, and the hot plate is placed such that the initial point of contact between the hot plate and the thread is at a distance of 30 cm or less from the point of separation of the thread on the heating roller, and the rotational speed of the heating roller is 100 m/min or more. |
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Composition for obtaining fibres by electrospinning Water composition contains in wt % 15-40 solution of interpolymeric complex, 50-80 aqueous solution of thickening agent (concentration 8 - 14%) and acidity regulator 2H HCl to pH=2 - 4. Interpolymeric complex is obtained by mixing 1% solution of polyacrylacid and 10% solution of polyvinyl alcohol with component ratio 1:1. As thickening agent, applied is polyvinyl alcohol or polyethylenoxide. Viscosity of composition constitutes from 0.5 to 0.9 Pa·s. |
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Method of modifying cellulose diacetate fibres Invention relates to the technology of producing modified polymer fibres, particularly modified and dyed cellulose acetate fibres. The composition for moulding fibres contains cellulose diacetate with acetyl number of 54.59%, a lycopene modifying additive and an organic solvent - mixture of acetone and water in volume ratio of 95:5. |
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Invention relates to the textile industry, and refers to nylon staple fibres suitable for use in abrasion-resistant high strength nylon yarns. Obtaining of high strength nylon staple fibres with a denier per filament of about from 1.0 to 3.0 is included, as well as the strength of fibre T of at least about 6.0, and the carrying capacity T7 greater than about 2.5, including more than 3.2. These nylon staple fibres are manufactured by obtaining tows of filament yarns of nylon with a relatively high molecular weight (RV from 65 to 100), stretching and annealing of such tows using the two-stage stretching operation with annealing and subsequent stapling or other transformation of the tows stretched with annealing in the required high strength nylon staple fibres. The nylon staple fibres thus obtained may be mixed with the accompanying fibres such as cotton staple fibres, for production of nylon/cotton yarns (NYCO). |
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Nylon staple fibres with high carrying capacity and mixed nylon yarns and materials made of them Invention relates to the textile industry, and refers to nylon staple fibres with a high carrying capacity and mixed nylon yarns and materials made of them. The high strength nylon staple fibres are characterised by the denier per filament of 1.0 to 3.0, the strength of fibre T of at least about 6.0, and the carrying capacity T7 of more than 3.2. The tows of nylon filament yarns are manufactured, which are relatively uniformly moulded and hardened, by such tows stretching and annealing with the two-stage operation of stretching with annealing using relatively high degrees of stretching and subsequent stapling or other transformation of the stretched and annealed tows in the required high strength nylon staple fibres. The nylon staple fibres thus obtained may be mixed with other fibres such as cotton staple fibres, for production of nylon/cotton yarns (NYCO). |
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Acoustic screen for spinning machines Acoustic screen for spinning machines comprises a cover, on which a layer of a sound-absorbing element is fixed, tightly closing a unit of an aerodynamic torsion device together with a source product and a roller of a drawing instrument with a driving belt. According to the invention, the sound-absorbing element is made in the form of a smooth and a perforated walls, between which there is a sound-absorbing material, arranged in two layers, one of which, a more rigid one, is made as solid and shaped, and the other one, soft one, is made as interrupted and arranged in the focus of sound-absorbing surfaces of the first layer. The solid shaped layer of the sound-absorbing material is made from a material, in which the coefficient of sound reflection is more than the coefficient of sound absorption compared to the coefficient of sound absorption, besides, profiles are formed by spherical surfaces, connected to each other so that as a whole each of profiles forms a solid dome-shaped profile, which focuses the reflected sound to one and the same soft sound absorber, which is arranged in the focus of the solid shaped layer. Sound absorbers are made in the form of revolution bodies, for instance, in the form of balls, ellipsoids of rotation, and are fixed with the help of rods, parallel to a perforated wall and rigidly connected to the smooth wall by means of vertical joints. |
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Method for application of heat-protective and conductive coating on carbon fibres and fabrics Method for application of heat-protective and conductive coating on carbon fibres and fabrics includes plasma spraying of cermet compound in the form of mechanical powder blend containing 5-15 wt % of nichrome, 15-5 wt % of zirconium dioxide, 70 wt % of aluminium, 10 wt % of aluminium-nickel, and 4-7 wt % of yttrium oxide as stabilising agent for zirconium dioxide. |
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Method of producing polyamide imide-based hollow fibre based and hollow fibre Method involves preparing a spinning solution containing, in an aprotic solvent, 20-25 wt % polyamide imide and 5-15 wt % organic compound selected from a group comprising benzotriazole, benzoimidazole and imidazole. A dry-and-wet method is used to form hollow fibre from said solution. The fibre is washed and dried. Subsequent heat treatment is carried out at temperature not higher than 360°C. |
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Acoustic screen for spindle drive Acoustic screen for the spindle drive comprises a rigid wall on which a layer of sound absorptive material is applied. The rigid wall is made box-shaped, it covers the spindle drive and has technological holes for heat abstraction. According to the invention, the rigid wall is additionally attached to the sound absorbing element which is made in the form of a smooth and a perforated walls, between which the sound absorbing material is located, placed in two layers, one of which, which is harder, is formed solid and profiled, and the other, which is soft, is made discontinuous and is located in the focus of the sound-reflecting surfaces of the first layer. The solid profiled layer of sound absorbing material is made of a material which coefficient of sound reflection is greater than the coefficient of sound absorption. The profiles are formed by spherical surfaces, interconnected so that, in general, each of the profiles forms an integral domed profile, focusing the reflected sound at the same soft sound absorber, which is located at the focus of the solid profiled layer made in the form of bodies of revolution, such as balls, ellipsoids of revolution, and is fastened by means of rods, parallel to the perforated wall and rigidly connected to the smooth wall by means of the vertical links. |
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Easy dyeable wholly aromatic meta-type fibre Proposed easy dyeable wholly aromatic polyamide meta-type fibre is obtained by using an aqueous solution containing the amide solvent in a concentration of from 45 to 60 wt % at the coagulation stage. The coefficient of plastifying stretching of the fibre at the stage of plastifying stretching is in the range from 3.5 to 4.5. The temperature of dry heat treatment of the washed fibres at the stage of dry heat treatment is in the range from 260 to 330°C and the residual solvent content in the said fibre is 0.05-0.1 wt %. The degree of dye extraction is 90-92.4%, the index of dyed fibre strength retention after immersion for 150 hours in a 20 wt % aqueous solution of sulfuric acid at 50°C is 65-73%. |
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Method of bleaching of flax roving Method comprises acid treatment, reducing boiling and oxidation treatment with the solution of hydrogen peroxide at a temperature from 95 to 100°C, avivage and washing between the technological operations first with hot and then cold water. The acid treatment is carried out with the preparation which is a composition comprising sulfamic acid with a concentration of 0.5 to 2.0 g/l. The boiling is carried out for 40 to 90 minutes using as a reducing agent the composition containing derivatives based on sulfinic acid with a concentration of 0.5 to 2.5 g/l and the reducing agent with the complexing additives with a concentration of 1.5 to 2.5 g/l. |
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Thread tension device of warping frame Thread tension device of warping frame comprises shaped brake washers with curved edges, placed on a flat curly bracket, placed on the rod, which is mounted coaxially towards shock-absorbing washer. At that on the bracket concentrically to the washers a groove is made with a finger located in it. The finger is mounted with the ability of reciprocating movement along an arc. Above and below the bracket on the finger the flange bushings are placed with the ability of free rotation, at that a spiral cylindrical spring is tangentially located towards the lower flange bushing. |
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Weight and holding lever of pressure rollers of drafting element of spinning machine Weight and holding lever of pressure rollers of drafting element of spinning machine has a downwardly open U-shaped housing in which at least one slider is located, comprising a loading element, and a holder for fixing the upper roller and an adjusting device by means of which the slider can be moved longitudinally relative to the housing and positioned on the upper side of the housing. For locking the slider in the housing of U-shaped section with the blocking of rotation around the vertical axis the bearing surface of the slider has a configuration which engages the corresponding configuration of the inner surface of the upper side of the housing, forming a form closure. |
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U-shaped open down pressure and holding lever of pressure rollers Invention relates to spinning industry, in particular to a drafting device for machine for spinning industry. U-shaped, open down pressure and holding lever of the pressure rollers for the drafting device of the machine for spinning industry is mounted with its end through the support on the rail and on the end side of the opposite to the support it has a locking element, consisting of synthetic material. The locking element is connected by detachable form closure with pressure and holding lever of the pressure rollers and is intended for removable unit of accessories used in the drafting device. |
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Installation of carbonisation of fibre viscose materials for obtaining composite carbon filaments Invention relates to chemical technology of fibrous materials and relates to installation of carbonisation of fibre viscose materials for obtaining composite carbon filaments. The installation comprises a housing and a carbonation chamber placed in it, which end walls are provided with slotted holes for input of the source material and output of carbonised material, and sealing closures, as well as electric heating elements, pipe branches for supply of inert gas and output of distilling gases. The housing with the chamber is mounted obliquely at an angle 10-15° to the horizontal plane. The hole for input of the source material is located in the lower end. The chamber is placed into the additional casing, which upper wall is spaced from the upper chamber wall at a distance of 100-150 mm, is provided with a transverse slot that extends the entire width of the upper wall of the chamber and communicates with the pyramidal-shape pipe branch for devolatilisation, integrally mounted near the output end of the housing of the installation, and equipped with heating. Heat insulation of the installation is located between the walls of the housing and the casing, the heaters are located outside the chamber, at that they are in direct contact with the lower wall, and in relation to the upper wall they are fastened with the possible variable clearance. |
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Invention relates to a method of production of coloured single-core line of ultra-high molecular polyolefin. The method comprises the following stages: obtaining a substantially untwisted multifibre yarn from ultra-high molecular polyolefin, applying the colourant on substantially untwisted multifibre yarn, twisting the coated multifibre yarn and heating to partial fusion of adjacent fibres with the yarn drafting. |
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Method of processing of flax straw to obtain flax fibre Invention relates to the field of primary processing of bast crops, in particular flax. The method comprises exposing the straw to superweak high frequency electromagnetic field, followed by separation of flax fibre. Exposure the straw to superweak high frequency electromagnetic field is carried out with the polyethylene film contact angle of not less than 63 degrees, which is preliminary treated with this field for 10-30 minutes. The straw is exposed with superweak high frequency electromagnetic field with the wavelength of 200-204 nNm and tension of less than 0.1 mMcTtl within 7-10 days. |
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Method of production of bast fibre and device for its implementation Invention relates to the field of primary processing of bast plants, namely, to methods of production of bast fibre and devices for their implementation. The method of production of bast fibre comprises supplying material to the processing zone, destruction of stem structure and separation of chaff from the fibres due to intensive sliding bending-fracture, the subsequent separation of bast fibres and the chaff. Feeding the material into the processing zone is carried out under the action of the air stream with creation of the material vibration in it and decrease in the interaction forces of the stems, their parts, fibrous strands. The separation of bast fibres and the chaff is carried out in two stages, on the first of which the enrichment of the chaff-fibre mass is carried out through removal of the chaff, based on differences in the aerodynamic properties of bast fibres and the chaff during the interaction with the airflow. The device comprises a disintegrator of two units of purification, sequentially mounted along the path of the material displacement. In the centre of the disintegrator rotor a cone-shaped divider is mounted. The first purification unit is made in the form of a horizontal plate discharger. |
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Thread of aromatic polyamide and method of its manufacturing Thread consists entirely of aromatic polyamide. The thread is characterised by a narrow range of polydispersity index (PDI) and increased apparent size of the crystal (ASC). |
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Thread of aromatic polyamide and method of its manufacturing Thread consists entirely of aromatic polyamide. The thread has a high crystallinity (C), large apparent crystal size (ACS) and a reduced amount of defects of the crystal itself. |
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Thread of aromatic polyamide and method of its manufacturing Thread consists entirely of aromatic polyamide. The thread has a narrow range of polydispersity index (PDI) and lower paracrystalline parameter g11, which leads to decrease of defects of the crystal itself. |
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Method for obtaining nano-cellulose Method includes vegetable material fractionation, fraction autoclave treatment with three times washing-off, the first acid hydrolysis with three times washing-off, alkaline hydrolysis with three times washing-off, the second acid hydrolysis with three times washing-off, the first bleaching with three times washing-off; the second bleaching with four times washing-off. Additional homogenisation stage is possible. |
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Articles and methods involve extruding a solution of carbon nanotubes in a superacid, followed by removing the superacid solvent. The articles can be treated with extrusion methods of wet spinning based on a wet injection technique, wet spinning based on a dry injection technique and combined flow of the coagulant. |
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Drum of blowing machine for treatment of bast fibres Drum of blowing machine for treatment of bast fibres comprises beaters located circumferentially, attached on the shaft by means of crossbars carrying under-beater grid, as well as several beater planks on each beater, which have a different outreach of the edges relative to each other. According to the invention, the working edges of all beater planks have a wavy shape, at that the crests of the adjacent planks are offset relative to each other along the length of the drum, and the outreach of the working edges of the beater planks relative to each other may vary along the length of the drum. |
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Processing line for production of flax fiber Processing line for production of flax fiber comprises consistently mounted downstream the technological process the dryer of flax stock rolls, uncoiler of the rolls, a group of breaking-tow shakers, a blowing-cleaning machine for preliminary processing of industrial fiber, a can small-sized carding machine for cleaning fibers from chaff and partial cottonising of fiber, a modifier of flax ribbon to produce the fiber modified in length, in which the fiber is crushed and is exposed to final purification from chaff, a condenser for removal from fiber of dust and fine foreign impurities. |
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Forming head for dry forming of fibrous web Invention relates to forming head arranged above forming acicular band opposite the drawing unit. Forming head (1, 25) is divided into at least two separate interconnected distribution units (2, 3, 4, 5, 26, 27, 28, 29, 30, 31), each comprising at least one rotary roll (11, 12, 13, 14, 15, 16, 17, 18, 19, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41) with extending teeth (12). At division of forming head (1, 25) into larger quantity of interconnected distribution units (2, 3, 4, 5, 26, 27, 28, 29, 30, 31) ensured is efficient loosening of sinters, thickening and/or lumps of fibrous material. |
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Method of producing carbon fibre materials from viscose fibres Method involves treating viscose fibre material with pyrolysis catalysts, heating to carbonisation temperature and subsequent graphitation to temperature of 3000°C in an inert medium. Carbonisation is preceded by preparation of precursor by preliminary washing of the starting material with water and/or 5-10% sodium hyposulphite solution with heating and drying, and/or ionising irradiation with a beam of fast electrons during transportation through the irradiation chamber of an electron accelerator, and/or warm-wet synthesis of a complex catalyst on the surface of viscose fibres and in the pore system thereof in boiling 10-20% aqueous ammonium chloride solution and with addition of diammonium phosphate in ratio of 0.5-4.0, followed by steaming in hot steam and final ventilated drying with constant transportation, which enables to deposit the catalyst in form of an amorphous film. |
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Method of producing high-molecular weight polyethylene fibres Method involves applying a force on a polyethylene strip in the direction of the thickness of the strip on the entire width of the strip. The strip has weight-average molecular weight of at least 500000 g/mol, the ratio Mw/Mn of at most 6 and unidirectional orientation parameter 200/110 of at least 3. The polyethylene fibre for the strip has Mw of at least 500000 g/mol, the ratio Mw/Mn of at most 6 and unidirectional orientation value 020 of at most 55°. The fibres are used in ballistic applications, ropes, cables, nets, textiles and protective articles. |
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Method of producing microcellulose Invention involves fractionating plant material, steaming the fraction, acid hydrolysis, first and second alkaline hydrolysis and bleaching. |
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Device for stretching-over drums and rollers of the carding machine with all-metal saw-toothed card clothing (AMSTCC) comprises a guide shaft rigidly mounted parallel to the sidewall of the stretched-over drum of the carding machine, a carriage mounted on the shaft with the ability to move along the drum sidewall, the lever with tension mechanism and with spreader of all-metal saw-toothed card clothing and a drive of the device for rotating the drum at a predetermined speed. The lever is mounted with its lower end to the carriage with the ability to move together with it while stretching-over the drum with the saw-toothed card clothing. On the lever, perpendicular to the drum axis a beam with a sensor and the receiver of the measuring device is fixed, located on opposite ends of the beam, at that the upper boundary of the scanning signal coming from the sensor to the receiver is located at least 1 mm above the measuring base, and its lower boundary is located at least 1 mm below the point of contact of the spreader with the sidewall of the drum. The beam with the sensor and the receiver is located at a distance of 0.1 to 400 mm from the spreader. |
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Polyvinylidene chloride compositions and use thereof in monofilament structures Thread is obtained by extruding a composition through an extrusion head, the composition containing: (a) at least one vinylidene chloride polymer/methyl acrylate interpolymer containing at most about 6 wt % methyl acrylate monomer units in the polymer; and (b) at least about 3 wt % plasticiser, of which at least about 0.5 wt % based on total composition weight is an epoxy plasticiser or a combination thereof with others. Optionally and preferably in such extruders where the composition of (a) and (b) exhibits less uniformity in extrusion than is desired, at least one methacrylic polymer is added. |
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Ultra-thin thread containing deodorant and method for production thereof Thread contains a deodorant with particle diameter equal to or greater than the average diameter of ultra-thin elementary fibres. The deodorant is partially coated with a polymer and partially remains uncoated on the surface of the thread, thereby greatly improving deodorant action. The invention enables to make a thread having a lasting deodorant action. |
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Method of combing layer of flax raw material Method of combing the layer of flax raw material comprises the procedure of moving the layer in the horizontal plane by means of a clamping conveyor, a simultaneous procedure of combing the butt and the top parts of stems by needles that pierce sequentially the layer of flax raw material near the side surfaces of the clamping conveyor and move in the plane of motion of the layer in the direction of its movement and in the perpendicular direction. The value of speed of the layer and the speed of the needles in the direction of the layer movement are equal, the amount of movement of the needles in the direction perpendicular to the direction of the layer movement and the speed of their movement change depending on the width of the combed layer. |
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Method and apparatus for producing fine fibres Method and apparatus for producing fine fibres via fibre electrospinning by applying an electric field between a primary electrode and a counter electrode lying at a distance from the primary electrode and often parallel thereto. The working surface of the primary electrode is coated with a polymer solution. An electric field is created between the primary electrode and the counter electrode having sufficient strength to cause formation of fine fibres in the space between the electrodes. The working surface of the primary electrode coated with a polymer solution consists of corresponding parts of surfaces of a plurality of elements that are semi-submerged in the working state and are freely lying (not connected to anything), said elements resting at the bottom of a bath or tray or some other supporting structure(s). A tool is used, which enables to apply the polymer solution on the surface of the freely lying elements protruding from the solution via rotation thereof in the polymer solution, such that their surface is coated with a thin layer of the polymer solution. |
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Method of processing of complex bast fibers and device for its implementation Method of processing complex bast fibers consists in the destruction of connecting textiles by cyclic deformation of complex bast fibers. The device of processing of complex bast fibers comprises feeding and discharge means and means for destruction of connecting textiles connecting the elementary fibers to each other, made in the form of a bearing and compression elements. |
Another patent 2513043.