High modulus high strength uhmwpe fiber and method for its production

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



Same patents:

FIELD: chemistry.

SUBSTANCE: primary ground material for a carpet, comprising at least a first fibre layer and a second fibre layer, characterised by that both fibre layers are layers of nonwoven material consisting of randomly laid fibres and that both fibre layers have the same composition on the entire fibre layer, where linear density of fibres is in the range of 1 dtex to 25 dtex, wherein both fibre layers contain at least two different polymers and at least one polymer contained in the first layer, different from the polymers contained in the second layer.

EFFECT: obtaining carpet material.

13 cl, 2 tbl

FIELD: technological processes.

SUBSTANCE: invention relates to piling of fibrous materials and method of its arrangement. The piling comprises at least two layers of unidirectional carbon fibres going in different directions, in which each unidirectional layer is connected on at least one its surface with an adjacent layer of non-woven material from thermoplastic fibres, besides, between two serial layers of unidirectional carbon fibres there is at least one layer of non-woven material from thermoplastic fibres. Connection between each unidirectional layer and each layer of non-woven material adjacent to it is provided due to the specified layer of the non-woven material, by means of welding spots resulting in intermittent welding. Specified welding points also provide for cohesion of piling, at the same time at least one welding spot includes perforations, which form channels for diffusion of resin and going into thickness of piling from fibrous materials across the piling layers.

EFFECT: invention provides for increased mechanical properties and drapability, absence of microcracks.

23 cl, 9 dwg, 5 tbl

FIELD: chemistry.

SUBSTANCE: subject of the invention is represented by a felt material, which contains, at least, one felt layer and one absorbent-containing layer, a method of the felt material manufacturing and the application of the felt material in textile products, footwear, for technical and medical purposes. The felt material in accordance with the invention possesses advantages of traditional felt materials with respect to heat- and sound-insulating properties and is air-permeable in the dry condition. However, due to special implementation the said material is waterproof in the wet condition and, therefore is suitable for sealing many types of materials. The felt material in accordance with the invention binds air moisture to a larger extent or binds water in a way, different from the traditional felt materials.

EFFECT: creation of the absorbent-containing material with high mechanical strength and good air permeability in the dry condition, in addition, the material must be suitable for air conditioning as, for instance, ventilation, dehydration and/or humidification of respective products made by means of it.

33 cl, 10 dwg

FIELD: chemistry.

SUBSTANCE: described are alkali-resistant fibrous products, laminates and methods of their manufacturing. The said product includes fibres and/or one or more fibre strands, with the most mass of the fibres in a mat being glass fibres and/or one or more strands of the glass fibres, the fibres, fixed together in places, where the fibres and/or one or more strands of the fibres intersect with each other for approximately 10 to approximately 35 wt %, counted per dry weight of the product, in a dry state, a binding agent, containing from 1 to approximately 60 wt % of an ureaformaldehyde binding agent and from approximately 45 to 99 wt % of a melamineformaldehyde binding agent, with bringing the total percent content to 100 and basing on the weight of the binding agent in the said product, fixation of the fibres in the said product. Higher resistance to alkalis is provided.

EFFECT: fibrous mat, fabric or cloth product possesses high resistance to alkali substances, which have pH, at least, 7.5 and especially to a saturated water solution of calcium hydroxide.

17 cl, 6 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to sheet, its application and to polymer composition, used for obtaining film in form of sheet. Sheet is characterised by rate of water vapour passing (RWVP), equal to, at least, 100 g/m2·day, with measurement being carried out in accordance with document ISO 12572(B) at 1 bar, 23°C and 85% relative humidity. Sheet contains film, made of polymer composition, which contains polar thermoplastic elastomer, sterically hindered amine light stabiliser (SHLS), UV-absorber and aromatic amine radical scavenger. Film is less than 50 microns thick. Sheet is applied in clothes, as films in buildings and as packing material.

EFFECT: invention makes it possible to obtain polymer film with increased service term and sheet, characterised by high water vapour permeability.

8 cl, 1 tbl, 6 ex

FIELD: textiles, paper.

SUBSTANCE: nonwoven filtering material comprising a nonwoven web of an anion-exchange modified polyamide fibres and a system of fastening loops of stitching thread, additionally comprises a second fibrous layer of hydrophilic modified polyamide fibres, the stitching thread is used as the yarn from a mixture of hydrophilic modified polyamide fibres and the high-shrinkage viscose fibres with the content of the latter in the mixture of 30-40%, the stitching thread when fastening with the tricot laying forms the plush broaching located between the fibrous layers, at that the distance between the layers is 4-7 mm, and the ratio of the layer of the modified anion-exchange polyamide fibres, the stitching thread and the layer of hydrophilic modified polyamide fibres by weight is 1:0.2:0.5.

EFFECT: increased protective properties of the filtering elements of the respirators reduced suction coefficient due to increasing the stiffness of adjacency of the half-mask along the line of obturation.

1 dwg, 1 tbl

FIELD: textiles, paper.

SUBSTANCE: absorbing article according to the present invention comprises the following elements: a liquid-permeable upper sheet; a liquid-tight lower sheet; an absorbing element located between the upper sheet and the lower sheet for absorbing liquid, permeating through the upper sheet, and a receiving layer located between the upper sheet and the absorbing element for supplying liquid penetrating through the upper sheet to the absorbing element. The receiving layer comprises a nonwoven fabric perforated without physical or thermal deformation.

EFFECT: invention provides a method of production of nonwoven fabric, perforated without physical or thermal deformation, and an absorbing article comprising such nonwoven fabric.

24 cl, 8 dwg

FIELD: textiles, paper.

SUBSTANCE: invention relates to a method of manufacturing a velour carpet comprising the following steps: a) needle punching of the nonwoven material/nonwoven material "Mali" on the strip with the bristles using needle felting machine, in which course of implementation the shaggy nonwoven material/bearing nonwoven material is dragged through the strip with bristles and partially withdrawn back from the strip with bristles such that the fibers of the shaggy nonwoven material/bearing nonwoven material are located in the plane of the strip with bristles; b) separation of the nonwoven material from the strip with bristles using a shaft-brush; c) brushing the shaggy side prior to cutting loops. Additional nonwoven material/nonwoven material "Mali", especially shaggy nonwoven material/bearing nonwoven material is placed on the back side of the nonwoven material/nonwoven material "Mali", especially between first and second needle felting machines, between the steps a) and b).

EFFECT: increased density of fiber and increased stability of shag.

8 cl, 6 dwg

FIELD: textiles, paper.

SUBSTANCE: conductive material comprises a conductive nonwoven fabric containing conductive carbon fibers in an amount of 5-50 wt % in combination with cellulose fibers and/or synthetic fibers. The nonwoven fabric comprises conductive and non-conductive zones that contain sonicated sections. The conductive material is used in production of heating devices, electronic switches, electronic devices, RF modification devices. In the electronic switch the conductive nonwoven fabric is spaced from the opposite conductive layer and the electrical connection is formed between them when they are pressed to each other. The electronic switch is used in production of a garment, a glowing symbol. The electronic product comprises an outer surface intended for location of plurality of keys, a first conductive layer located under the keys, the second conductive layer, spaced from the first conductive layer, and in which when pressing one of the keys an electric connection is created between the conductive layers.

EFFECT: reduction of weight of the non-woven conductive fabric, increased strength of the multilayer flexible electronic device, reduction of the total resistance of heating devices.

19 cl, 21 dwg

FIELD: construction.

SUBSTANCE: panel comprises a leaf (3), arranged between two layers of coatings (2), made of fibrous structures (21), which are attached by means of a layer-forming or a connecting material, for instance, a polymer (22), a binder, a foamed polymer. The leaf usually contains foamed materials, thick felts, powder materials, semifluid materials, etc. Fibres (7) from fibrous structures (21) are pulled along one or more directions of inclination relative to layers of coatings (2) and usually by means of needle piercing, into the leaf (3), in particular, into foam plastic plates (4), which represent the leaf. The fastening material is also used to fix the pulled fibres (7) to do mutual fixation of leaf (3) components and coating layers (2).

EFFECT: invention may be used for economically efficient manufacturing of especially stable composite panels with a high number of leaf components, layers of coatings and alignment of pulled fibres of fibrous structures.

20 cl, 18 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a smoothing composition consisting of one or two polyorganosiloxanes for a yarn, fibre or thread, which can be weaved using a method which does not include a smoothing or washing step, containing said composition on at least part of their surface. The invention also relates to a method of producing said yarn, fibre and thread. The invention also relates to a woven fabric, made from said yarn, fibre or thread, using a method which does not include a smoothing or washing step, i.e. dry weaving. Said yarn, fibre or thread and the obtained woven or knitted fabric are used for air bags.

EFFECT: improved characteristics of the fabric, necessary when the fabric is used for air bags - resistance to attrition, abrasive wear, fire-resistance and thermal stability.

19 cl, 1 tbl, 16 ex

FIELD: textile, paper.

SUBSTANCE: bundles of fibres with a total denier of 10000 to 500000 dtex is obtained by binding thermoplastic, conjugate, continuous fibres, which have an individual fibre denier of 0.5 to 100 dtex/f and whose center of gravity of conjugate components varies between the conjugated components in the cross section of fibre. Thermoplastic, conjugate, continuous fibres composing a bundle of fibres have existing coils from 8 to 30 threads per 2.54 cm. Density of bundles of fibres ranges from 100 to 2000 dtex/mm2 and is determined according to dependence of the D1/(W1xL1), where D1 is a total denier, W1 is width of bundle of fibres and L1 is a thickness of bundle of fibres. The ratio of canvas density after stretching the bundle to the bundle density is equal to 0.10 or less. The method of producing fabrics comprises the step of pulling the said bundle of fibres with an extraction coefficient from 1.4 to 3.0. Canvas with a total denier from 10000 to 1000000 dtex contains thermoplastic, conjugate, continuous fibres aligned in one direction and have an individual filament denier of 0.5 to 100 dtex/f and whose center of gravity of conjugate components varies between the conjugated components in fibre cross-section. Thermoplastic, conjugate, continuous fibres have spiral circuits from 10 to 100 circuits per 2.54 cm. Density of canvas ranges from 5 to 80 dtex/mm2 and is determined from the dependence of D2 / (W2xL2), where D2 is total denier, W2 is a canvas width, and L2 is canvas thickness. Presence on the fibres of more than 100 spiral circuits per 2.54 cm at a canvas density from 10 to 100 dtex/mm2 is possible The item is made of canvas. In the product the canvas is combined with the help of a set of partial sections of thermal bonding with another canvas or coating without spiral circuits, or with other canvas or coating with less spiral circuits. Loop from which a different fabric or coating extrudes is formed between the partial areas of thermo-attachment. The product can contain many components with fibre length from 3 to 50 mm, thermally attached with the parts to canvas or covering that serves as the base. With the use of a part or a product the final product is received.

EFFECT: obtaining the bundles which is capable of wrapping in the structure with a high density of fibres and which has properties ensuring uniformity of canvas, its high volume and soft tactile properties.

9 cl, 2 tbl

The invention relates to textile production

The invention relates to a method of manufacturing a composite harness from the polymer matrix reinforced torn by the tension of the fibers, and so manufactured product

FIELD: chemistry.

SUBSTANCE: 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.

EFFECT: fibres have high breaking strength and high energy of rapture.

15 cl, 2 tbl, 5 ex

FIELD: metallurgy.

SUBSTANCE: thread is produced from polyethylene of super-high molecular weight with characteristic viscosity of 8-40 dl/g. Note here that said thread features creep rate defined at 70°C and 600 MPa equal to at most 5-10-6s-1. Complex thread produced from polyethylene of super-high molecular weight with characteristic viscosity of 8-40 dl/g containing 0.2-10 alkyl groups C1-C4 per 1000 atoms of C features creep rate defined at 70°C and 600 MPa equal to at most 3-10-6s-1. Invention covers also semi-finished articles including said thread, particularly, super-strong ropes, bullet-proof modules, medical implants.

EFFECT: better thread characteristics.

14 cl, 4 dwg, 5 tbl, 28 ex

FIELD: chemistry.

SUBSTANCE: invention relates to fibre made from a polyethylene composition, a method of making said fibre, fabric made from said fibres and a method of making said fabric. The fibre is made from a polyethylene composition which contains at least 80 wt % of a (co)polymer, which contains at most 100 wt % links obtained from ethylene and less than 20 wt % links of one or more α-olefin comonomers. The composition has density of 0.920-0.970 g/cm3, molecular weight distribution (Mw/Mn) of 1.70-3.5, flow melt index (I2) of 0.2-1000 g/10 min, molecular weight distribution (Mz/Mw) of less than 2.5 and vinyl unsaturation level of less than 0.1 vinyl groups per thousand carbon atoms present in the backbone chain of said composition. The disclosed fibre can have denier value per filament less than 50 g/9000 m, breaking strength of 0.1-15 g/denier and relative elongation less than 1500%.

EFFECT: fabric made from said fibre, both woven and nonwoven, have high tearing strength, improved softness and drapeability.

10 cl, 4 dwg, 10 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a novel polyethylene composition which is particularly suitable for making monothreads, monobelts and a stretched belt. The invention also relates to a film containing said composition, as well as use of the polyethylene composition to obtain textile articles made from fibre, monobelts or stretched belts. The composition contains 95.1-99.5 wt % polyethylene and 4.9-0.5 wt % polybutene. The polyethylene is a homopolymer or copolymer of ethylene, having density higher than 0.930 g/cm3, polydispersity Mw/Mn from 2.0 to 5.9 and MFR (190/5) from 1.5 g/10 min to 5.0 g/10 min. The polybutene is a homopolymeer of 1-polybutene or a copolymer of butene, and the polybutene has MFR (190/5) from 1 g/10 min to 10 g/10 min. The composition is used to obtain a film. The invention also describes use of the polyethylene composition to produce monothreads, monobelts or stretched belts, and a method of producing a stretched belt from the polyethylene composition.

EFFECT: stability of the sleeve and mechanical properties of films made from said composition are greatly improved.

10 cl, 4 tbl, 3 ex

FIELD: construction.

SUBSTANCE: fibre has an average diameter from 0.15 to 2.0 mm, is double-component of core/shell type and is made of polyolefines or other thermoplastic polymers. The fibre is produced by coextrusion with drawing ratio from 5 to 15. On completion of drawing the fibre has surface, which is structured or corrugated continuously or with intervals. Depth of structuring makes more than 10% of the average fibre diameter, and the maximum distance between tops in the formed structure in axial direction makes from 0.5 mm to 3 mm. Such fibres are applied to increase rupture strength, to improve behaviour after fracture or in general for mechanical strengthening of cement-based construction materials, in particular, concrete.

EFFECT: bundles with synthetic film may be introduced into a construction material without defects.

10 cl, 9 dwg