Improved fiber from polylactic acid
SUBSTANCE: multicomponent fiber includes an inner component surrounded by a distinct component of the shell. The inner component is formed of polylactic acid, and shell component is formed by polymer additive, which increases toughener. Configuration of fiber, which comprises an inner portion/shell attaches many different useful properties to obtained fibers. Introduction of polymeric additive, which increases toughness of fiber, increases energy absorption capability stresses, arising during fiber drawing, which increases the overall rigidity and strength of the fibers. Moreover, the presence in the shell of additive component, which increases toughness, increases the binding with other fibers, e.g., during the formation of nonwoven webs. Another advantageous effect of the invention is that the configuration of the inner part/shell can be obtained from the thermoplastic composition, in which polylactic acid and a polymer additive, that increases the impact strength, are mixed with each other.
EFFECT: receiving fibers from polylactic acid having good parameters elongation and high strength.
20 cl, 8 dwg, 10 tbl, 55 ex
SUBSTANCE: invention relates to meshy reinforcing roll materials designed for creation of reinforced layers in various coatings, for instance, road, asphalt, concrete ones, etc. The reinforcing mesh with cells formed by crossing bundles of threads, fixed by impregnation and/or a coating, where bundles comprise several threads, separate threads are longer compared to other threads of this bundle, and longer threads stretch in a wave-like manner and form loops. Bundles in one of crossing directions are made as doubled with a gap between each other, making from 0.01 to 0.55 of the bundle width, bundles in the other crossing direction are made as doubled without a gap between each other. Bundles doubled without a gap comprise longer threads stretching in a wave-like manner, forming loops that fix bundles doubled without a gap with bundles doubled with a gap in crossing zones. Width of bundles doubled with a gap makes from 1.3 to 2.5 of width of bundles doubled without a gap. Impregnation and/or coating is arranged by bitumen produced from water emulsion of bitumen.
EFFECT: reduction of possibility of irreversible deformation and damage of a mesh under conditions of considerable deformations of the coating and preservation of reinforcing ability of the mesh even after significant deformations of the coating.
SUBSTANCE: invention relates to meshy reinforcing roll materials designed for creation of reinforced layers in various coatings, for instance, soil, asphalt ones, etc. The reinforcing mesh with cells formed by crossing bundles of threads, fixed by impregnation and/or a coating, where bundles comprise several threads, separate threads are longer compared to other threads of this bundle, and longer threads stretch in a wave-like manner and form loops. Bundles in one of crossing directions are made as tripled with a gap between each other, at the same time each of three tripled bundles is made from two doubled bundles, placed without a gap between each other, bundles in the other crossing direction are made as tripled without a gap between each other, at the same time bundles tripled without a gap comprise longer threads stretching in a wave-like manner, forming loops, fixing bundles in the crossing zones as tripled without a gap, with bundles tripled with a gap. Impregnation and/or coating is arranged by bitumen produced from water emulsion of bitumen. The mesh is made with anisotropy by deformation capacity, where the anisotropy indicatrix is longitudinal to bundles of threads tripled without a gap.
EFFECT: reduction of possible irreversible deformation and damage of a mesh and also preservation of reinforcing ability of the mesh even after significant deformations of the coating.
SUBSTANCE: 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.
EFFECT: application of claimed spinning composition makes it possible to obtain fibres with diameter 200 - 400 nm with high indicators of hygroscopicity and steam-permeabilityat quite fast rate.
1 tbl, 3 ex
SUBSTANCE: polymer composition contains a first basic polymer (A) containing at least a thermoplastic polymer; a second basic polymer (B) containing at least a thermoplastic polymer and which is incompatible with the first basic polymer (A); and an additive (C) containing at least a substance which is incompatible with any of the first basic polymer (A) and the second basic polymer (B). The additive (C) is a liquid or suspension at temperature lower than the pyrolysis temperature of the first basic polymer (A) and the pyrolysis temperature of the second basic polymer (B). Components (A), (B) and (C) are separated from each other by a phase, and boundary surfaces, each lying between two phases (A), (B) and (C), are in contact with each other, forming spatially continuous parallel boundary surfaces. A moulded product, for example, is a filter or a spacer for refrigerators or capacitors. The polymer composition is used to produce an adhesive, ink, paint, films and fibre for a powdered catalyst.
EFFECT: polymer composition and products therefrom quasi-stably contain a large amount of substance which is incompatible with a polymer matrix, therefore suitable for obtaining moulded articles and other products having various properties.
25 cl, 10 ex
SUBSTANCE: mixture of polypropylenes basically contains a first homopolypropylene and a second homopolypropylene. MFR of the first homopolypropylene is higher than that of the second homopolypropylene. The weight fraction of the second homopolypropylene in the mixture of polypropylenes ranges from at least 3 wt % to a maximum of 25 wt %, wherein the remaining portion of the mixture of polypropylenes is basically composed of the first homopolypropylene. The second homopolypropylene has MFR, according to ISO 1133, from 0.7 to 14 g/10 min (230°C/2.16 kg). The difference between the MFR of the second homopolypropylene and the MFR of the first homopolypropylene is at least 10 g/10 min, and the upper limit of the MFR of the first homopolypropylene is 55 g/10 min (230°C/2.16 kg), according to ISO 1133. The mixture 'basically' contains only these two homopolypropylenes as polymers. The mixture can be added to a dopant or other additives except polymers. The mixture is obtained by separately feeding the first and second homopolypropylenes into an extruder.
EFFECT: invention enables to obtain high-expandability spunbonded nonwoven material from the corresponding mixture of polypropylenes.
26 cl, 4 dwg, 9 tbl
FIELD: textile, paper.
SUBSTANCE: textile fabric joined with a binding system comprises the following, wt %, dry weight: 10-90 water dispersion of polymerizates on the basis of conjugated aliphatic dienes and vinyl aromatic compounds, 10-90 starch, 0-10 additives, where the fabric is a nonwoven material.
EFFECT: invention makes it possible to improve the ability of fabrics to preserve dimensions under high temperatures with preservation of flexibility, ageing and stability properties.
26 cl, 1 tbl
SUBSTANCE: invention refers to nonwoven fibrous materials that can be used in various electrochemical devices, hydrogen accumulators, filtration devices, catalytic substrates, etc. Nonwoven fibrous material consists of fragments of activated carbon fibre, the average characteristic ratio of which is approximately between 1 and 5.
EFFECT: increasing efficiency of electric duodielectric capacitors.
16 cl, 1 dwg
FIELD: textile, paper.
SUBSTANCE: material includes the first web, at least, partially made of extruded strands, including auto-adhesive material on the basis of thermoplastic elastomer selected from a group including multiblock copolymers with radial, triple- and double-block structures, containing non-rubber segments of mono- and polycyclic arenes, rubber segments of polybutadiene and sterol-butadiene, a mixture of polyethylene polymer and block copolymer polystyrene-copolyethylene-butylene-polystyrene, polystyrene-polyethylene. The method of nonwoven material formation includes extrusion of multiple strands, which are formed of auto-adhesive material. The method additionally includes sending multiple strands to a moving support, arrangement of multiple strands on a moving support, and then stabilisation of multiple strands with formation of fabric. The system of fixation includes a nonwoven material, which has a web formed of multiple extruded strands from auto-adhesive material. The system of fixation also includes a foamed layer, which includes a surface with multiple vertical ledges, which include a similar auto-adhesive material.
EFFECT: multiple use of articles with such fixation system, they are easy to handle.
18 cl, 8 dwg
SUBSTANCE: procedure consists in mixing polymer granulate with particles of filler, in extrusion melt of mixture through draw plate and in drawing or relaxation of produced filament if necessary. Contents of filler in terms of polymer filament is 10-25 wt % and average (D50) dimension of particles is less or equal to 6 mcm. Filler is free from titanium dioxide and consists out of calcium carbonate at lest at 90 wt %. There is fabricated textile flat fabric, particularly non-woven material, by stacking the said polymer filament or its mixture with homogenous or several different natural fibres. The said items are used for hygienic articles, clothes for cleaning, wiping, floor washing. gas and fluids filtering, for insulating and padding materials, for geo-materials etc.
EFFECT: increased contents of filler in filament without deterioration of operation characteristics.
19 cl, 2 tbl, 3 ex
FIELD: textile, paper.
SUBSTANCE: this invention refers to method and device for manufacture of polymeric fibres and textile products in a closed system. System for manufacture of non-woven cloth from fibres includes a spinning beam unit configured for processing and supply of many flows of polymers for extrusion through the spinning nozzle holes. At that, spinning beam unit includes many supply passages interconnected as to fluid medium with the spinning nozzle holes where at least two supply passages are configured so that they can supply separate flows of polymers with various polymeric components to the spinning nozzle holes. Besides spinning beam unit includes many collectors for separation and independent keeping of various temperatures for various flows of polymers with various polymeric components. Each collector provides homogeneous heating of polymer flow flowing inside discharge pipe of polymer inside each collector, each discharge pipe is enveloped with heat exchange pipe in fact at homogeneous temperature, quick cooling chamber for receiving and quick cooling of extruded fibres from spinning nozzle holes. At that, quick cooling chamber includes gas supply source for direction of gas flow to extruded fibres. Also the system includes an exhaust chamber interconnected with quick cooling chamber and configured for receipt and release of quick cooled fibres, and a forming surface for receipt of extruded fibres leaving the exhaust chamber and forming of non-woven fibrous cloth on the forming surface. At that, system supports extruded fibres in closed space between the spinning nozzle holes and exhaust chamber so that contact of fibres to uncontrolled gas flows can be prevented.
EFFECT: simplifying the fabrication of wide range of fibres from variety of polymeric components and textile products having the required linear density of fibre (denier) and degree of homogeneity.
8 cl, 9 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to bulky nonwoven material used for cleaning and to its fabrication. Nonwoven bulky material (10) comprises first side (11), second side (12) opposite the latter, multiple macroscopic recessed ridges (21) and ledge (30) on at least first side (11). First recessed ridge (21) extends in first direction with reset interval. Ledge (30) is arranged between first recessed abutting ridges (21). Ledge (30) extends from second side (12) to first side (11) of bulky material (10).
EFFECT: material is suitable for efficient catching of coarse dust particles.
12 cl, 12 dwg, 1 tbl
FIELD: textiles, paper.
SUBSTANCE: in a nonwoven fabric a plurality of small fibrous fragments, having a deeper colour than the colour of the basic texture of the nonwoven fabric, is distributed and placed in a scattered state over the whole area of the nonwoven fabric. In addition, the value difference (T3) of thicknesses is 1 mm or less when determining according to the formula T3=T1-T2, where T1 is the thickness of the nonwoven fabric (10) in determining under the pressure of 7.64 kPa in the area where there is a fine fibrous fragment, while T2 is the thickness of the nonwoven fabric determined under the pressure of 7.64 kPa in the area where the fine fibrous fragment is absent.
EFFECT: improvement of the efficiency of manufacturing the nonwoven fabric.
23 cl, 4 dwg, 2 tbl
FIELD: process engineering.
SUBSTANCE: set of inventions relates to porous membrane, separator for electrochemical device including said porous membrane and said separator and to method of its production. porous membrane contains cellulose fibres wherein the latter are produced from the mix of over 50 wt % of initial material first cellulose fibres with surface area defined by staining with "congo red" dye and making 250 m2/g or more and 500 m2/g or less; and less than 50 wt % of second cellulose fibres with surface area defined by "congo red" staining and making 150 m2/g or more and less than 250 m2/g.
EFFECT: better properties, acceptable costs.
28 cl, 1 tbl, 8 ex
FIELD: textiles, paper.
SUBSTANCE: duplicating gasket is described, which is applicable, in particular, as a gasket for the front duplicating in the textile industry, with a carrier layer based on loosely coupled and structured with the waterjet method combing or nonwoven fabric. At that the carrier layer is bound only on the selected sites using a binder and is provided at least from one side with an adhesive mass. The carrier layer is structured so that it has a raster perforated structure.
EFFECT: high volume and reversible elasticity, extremely high elastic recoverability.
11 cl, 7 dwg
FIELD: textiles, paper.
SUBSTANCE: method for producing absorbent cotton includes mechanical and optional chemical processing of cotton and/or bast fibers and/or man-made natural and/or synthetic artificial fibers containing cotton and bast of step of bleaching, souring, washing, pressing, loosening, drying and carding, for natural and man-made synthetic man-made fibers of steps of hoeing and carding, followed by hackling and the formation of a mixture of fibers with manufacturing of beat up mixed fiber and the production of cotton canvas from it. Fibers are isolated from a mixture of cloth or rags and textile waste by pulping raw material. Hygroscopic cotton fiber comprises a mixture based on fibers selected from the group of cotton, bast, natural, artificial, synthetic, artificial fabric.
EFFECT: increasing the speed of wetting, absorption capacity, capillarity of cotton, recycling of various rags and textile waste and eliminating dependence from the deficit on raw material for the production of cotton.
11 cl, 1 tbl
FIELD: textiles, paper.
SUBSTANCE: absorbent cotton consists of bast fibers or fiber mixture based on cotton and/or bast, and optionally synthetic fibers. As the cotton fibers, at least cotton fibers itself and/or cotton blowing are used; as bast fibers, at least flax fibers and/or flax tow, and/or hemp fibers, and/or hemp tow, and/or jute fibers, and/or jute tow, and/or kenaf fiber, and/or kenaf tow are used; as the synthetic fibers, the viscose rayon fibers and/or polyester fibers are used. The method of producing absorbent cotton comprises mechanical and chemical treatment of cotton and/or bast fibers containing stages of bleaching, souring, washing, wringing, loosening, drying, rippling and forming the mixture of fibers to prepare the scutched mixed fibers and production of cotton canvas of it. The organic synthetic fibers for the textile industry are optionally added to a mixture of cotton and/or bast fibers after chemical treatment.
EFFECT: increase in the specific viscosity, elasticity of cotton, eliminating dependence on a deficit of any raw material used to produce cotton, and expanding the range of ready-made products of it.
4 cl, 9 tbl, 7 ex
FIELD: textile, paper.
SUBSTANCE: mineral fibres are produced from a mineral melt with the help of a fibre-forming apparatus, a binder is added to shaped mineral fibres, and are blown from the fibre-forming apparatus to a collecting surface, on which mineral fibres are assembled as a primary canvass. Optionally the primary canvass is interwoven into the secondary canvass. The primary canvass from the collected mineral fibre or the secondary canvass from the mineral fibre is processed at the working level of the first processing plant, and the canvass is transported on a conveyor to the working level of the second processing plant. Working levels of the first and/or second processing plant are adjusted substantially in one and the same plane in order to provide for displacement at one level of the canvass from the mineral fibre between processing plants.
EFFECT: reduced crippling and warping of a fibrous canvass between various processing plants.
9 cl, 1 dwg
FIELD: machine building.
SUBSTANCE: profiled sheet made from fibers comprises multiple ledges, jointing sections and recesses made on its surface. Note here that said jointing sections make boundaries to joint said ledges together. Note also that said recesses are located between said ledges aside from jointing sections, i.e. six recesses around each ledge. Invention relates also to absorbing article incorporating said sheet.
EFFECT: higher efficiency of absorbing fluid.
17 cl, 19 dwg, 3 tbl
SUBSTANCE: disclosed is an insulation material made with possibility of increasing volume thereof, containing clusters with a random shape, made with possibility of increasing volume thereof, wherein said clusters contain natural fibre or material. The clusters also contain synthetic fibre or material.
EFFECT: increase in comfort during use and reduced harmful effect owing to low content of synthetic materials.
FIELD: textile, paper.
SUBSTANCE: system (90) for fastening a nonwoven fabric (10) includes a canvas (12) formed from a variety of extruded threads (14). At least some of the threads (14) in the nonwoven fabric (10) include self-adhesive material. Foamed layer (91) includes a surface (92) having a variety of loosely arranged elements (93). The elements (93) are adapted for engagement with at least a part of the set of threads (14). And at least some of the loosely arranged elements (93) include a surface modifier. The surface modifier is a self-adhesive material, which is similar to self-adhesive material in the nonwoven fabric (10). The threads (14) of non-woven fabric (10) are formed of a multicomponent or bicomponent material. At least one of the materials in multicomponent or bicomponent materials is a self-adhesive material. In one version the absorbent article (95) contains a system of fastening (90) for fixation of the absorbent article (95) on the waistline of the user. In another version, the absorbent article (95) contains a system of fastening (90) for fixation of the absorbent article on the waistline of the user, where the surface modifier comprises a binder or polymer wax. The strength of connection between the non-woven fabric (10) and a part of the foamed layer (91) includes a surface modifier, with a strength of 1.5 times greater than the strength bond between the nonwoven fabric (10) and a part of the foamed layer (91), which does not include a surface modifier.
EFFECT: improved properties of mechanical fasteners and ease of production of fastening system.
18 cl, 18 dwg, 6 tbl, 6 ex
SUBSTANCE: 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.
EFFECT: polyester fabric made from said thread has a lasting deodorant action, high strength, an excellent texture and is suitable for use in sewing, medical and interior articles.
9 cl, 2 dwg, 1 tbl, 6 ex