Composite reinforcing yarn, prepreg, tape for 3d printing and installation for their production
SUBSTANCE: composite reinforcing yarn contains a roving of reinforcing fibers impregnated with a thermosetting binder, with a cross-section in the form of a circle with the diameter of 0.1-0.7 mm or ellipse with the ellipticity of 1 to 2 and the largest diameter of 0.1-0.7 mm. Impregnated roving is subjected to a temperature treatment until the thermosetting binder is completely cured. From the filament, prepreg is obtained by adding a thermoplastic binder. The tape is obtained by joining the yarn or prepreg with jumper wires made of thermoplastic material. The yarn is produced in an installation containing a bobbin, on which a coil with roving of reinforcing fibers or reinforcing and functional fibers is installed, an impregnating device, two heat treatment chambers, a ready-made filament receiving unit, a receiving coil. The temperature in the first chamber is 70-130°C, in the second chamber - 160-400°C. To produce the prepreg, a thermoplastic coating device is added to the installation to impregnate the thermosetting binder and fully cured roving.
EFFECT: invention allows to reduce the complexity of producing parts with a thermoplastic matrix, the duration of producing the product; increasing the shelf life of raw materials and the efficiency of producing the products from composite materials.
13 cl, 6 dwg
FIELD: textiles, paper.
SUBSTANCE: bicomponent fibers contain aliphatic polyester or a mixture of aliphatic polyesters, which form the first component, and polyolefin or a mixture of polyolefins, which form the second component. Polyolefin contains auxiliary material improving its biodegradation. Textile sheets include these bicomponent fibers and are comparable by mechanical properties to textile sheets based on polyolefin, while they are decomposed more efficiently under the action of microorganisms than the textile sheets based on polyolefin.
EFFECT: enhanced biodegradability, to textile sheets such as nonwoven materials comprising these fibers, which can be used in personal care products.
16 cl, 3 tbl, 2 ex
SUBSTANCE: invention relates to agriculture. Material, having insecticidal and acaricidal properties, contains: A) 99.95-70.0 wt % propylene-based polymer. The material can be obtained using a catalyst system containing a metallocene compound. The material has the following properties: i) melt flow rate (MFR) (ISO 1133) ranging from 2 to 100; (ii) molecular weight distribution Mw/Mn of less than 4; (iii) stereoregular pentads (mmmm) from 90% to 99%. The material also contains B) 0.05-30 wt % adduct of formula T1-T2. The adduct is obtained from condensation of T1 and T2, where T1 contains at least one pyrethroid compound. The pyrethroid compound is stable at temperature of at least 150°C. T2 is an ethylenically unsaturated compound selected from a group consisting of: (a) a surfactant; (b) vinyl phosphates; and (c) mixtures thereof. Components A) and B) are mixed, heated and extruded. Sheets, films, threads, fibres and a mosquito net are obtained from this material. Nonwoven materials are obtained from threads or fibres.
EFFECT: invention increases efficiency of the material.
9 cl, 1 tbl, 3 ex
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
FIELD: process engineering.
SUBSTANCE: invention relates to composites with high mechanical strength to prevent damages caused by striking, particularly, to production of laminates. Prepreg includes a structural layer of conducting fibres containing thermosetting resin fitted in gaps. First outer resin layer contains thermosetting resin and combination of electrically conducting free single threads. The latter are arranged on the surface of interface between said structural layer and resin outer layer. The latter hardening at increased temperature brings about hardened composite. The latter comprises hardened structural layer of compacted conducting fibres and first outer layer of hardened resin. Note here that said outer layer of hardened resin includes a portion of said combination of electrically conducting free single threads dispersed therein. Note here that said combination of electrically conducting free single threads is made of the portion of structural layer of conducting fibres.
EFFECT: light composite of excellent mechanical properties.
16 cl, 11 dwg, 2 tbl, 2 ex
SUBSTANCE: invention relates to constructive composite materials and can be used in construction, and in aerospace equipment. A solidified prepreg includes a structural layer of electrically conductive fibres and the first external layer of thermoactive resin, with the resin layer including thermoplastic particles and glassy carbon particles.
EFFECT: prepreg provides higher electrical conductivity, mechanical properties and resistance to damage, caused by strikes of lightning.
31 cl, 3 dwg, 2 tbl
FIELD: machine building.
SUBSTANCE: method includes plastification by heating of loose thermoplastic material to viscous-flow state and its movement under high pressure in mould cavity for solidification due to cooling. Prior to plastification the loose thermoplastic material is additionally treated by UHF radiation 450-750 W for 5-7 minutes.
EFFECT: increased destruction stress during tension, static bend, increased impact toughness of the material.
1 tbl, 4 dwg
SUBSTANCE: invention relates to an adhesive cushion based on epoxy resins and glass fibre cloth, used to produce multilayer printed-circuit boards. The adhesive cushion is made using glass fibre cloth soaked with a mixture of epoxy diane resin, 4,4'-diaminodiphenylsulphone, nickel acetylacetonate and spherical particles of butadiene nitrile styrene carboxylate polymer with a diameter of 10-8-10-7 m, with the following ratio of components, pts.wt: epoxy diane resin 100, polymer 5-20, 4,4'-diaminodiphenylsulphone 15, glass fibre cloth 130, nickel acetylacetonate 1.
EFFECT: reducing warping of the multilayer printed-circuit board to no more than 0,1 mm.
1 tbl, 3 ex
SUBSTANCE: claimed group of inventions relates to prepregs and components, obtained from them at lower temperature. Described are prepregs consisting mainly of: A) at least one fibrous base, and B) as matrix material of at least one urethdione group-containing powder-like polyurethane composition with high reaction ability, which contains mainly: a) at least one urethdion group-containing hardening agent based on products of polybonding of aliphatic, (cyclo)aliphatic or cycloaliphatic polyisocyanates with urethdione groups and compounds with hydroxyl groups, which is in solid form at temperature below 40°C, and in liquid form at temperature higher than 125°C and contains less than 5 wt % of free NCO-groups and from 3 to 25 wt % of urethdione groups, and b) at least one polymer with hydroxyl groups, which is in solid form at temperature below 40°C, and in liquid form at temperature higher than 125°C, and possesses hydroxyl number from 20 to 200 mg KOH/g, c) from 0.1 to 5 wt % of at least one catalyst, selected from the group, including quaternary ammonium salts and/or quaternary phosphonium salts with halogens, hydroxides, alcoholates or anions of organic or inorganic acids as counterions, and d) from 0.1 to 5 wt % of at least one cocatalyst, selected from the group, including: d1) at least one epoxide, with components a) and b) being taken in such ratio that for each hydroxyl group of component b) there is from 0.3 to 1 urethdione group of component a). Also described is method of obtaining said prepregs, and their application. Method of manufacturing components from composite material is described, with said prepreg, in temperature interval from values higher than 100°C and to 160°C, being pressed in suitable form under pressure and if necessary uncer vacuuming. Components from composite material, obtained by claimed method, are described.
EFFECT: stable in storage prepregs, preserving reaction ability, and therefore suitable for mixing, environmentally friendly, possessing optimal mechanical properties, simplicity of processing, and high atmosphere resistance.
17 cl, 4 dwg, 1 ex
FIELD: process engineering.
SUBSTANCE: invention relates to production of prepreg and prepreg-based materials. Proposed process comprises the feed of unilateral conducting fibres of definite width and bringing them in contact with resin first ply first surface including the thermosetting resin. Resin and fibres are compacting by forcing them under one or several impregnating rollers. Note here that pressure acting at conducting fibres and resin does not exceed 40 kg per conducting fibre width centimetre. The amount of resin should be sufficient for penetration in between fibres and for making of resin outer ply. The latter, in fact, does not contain unilateral conducting fibres. Besides, this invention relates to solidified composite laminate and solidified composite prepreg-based sheets produced as indicated above.
EFFECT: better resistance of breakage caused by thunderbolts.
17 cl, 5 dwg, 4 tbl
SUBSTANCE: polymer composition for polymer compositional materials contains oligocyanurate, hollow microspheres, additionally contains epoxy oligomer with viscosity less than 5 Pa·s at room temperature, with the following component ratio, wt %: oligocyanurate 20-60, epoxy oligomer 5-40, hollow microspheres 23-35. Polymer composition is additionally contains fibrous filler and/or disperse filler. Also claimed is product from polymer composition.
EFFECT: obtaining polymeric composition with increased viability at room temperature, which has higher compression strength, impact strength, work temperature.
13 cl, 3 tbl, 4 ex
SUBSTANCE: invention relates to prepregs, a method for production and use thereof, as well as a method of making components from composite material using said prepregs. The prepregs are made of A) at least one type of reinforcing fibres and B) at least one powdered polyurethane composition as a matrix material. Component B) contains: a) at least one urethdione group-containing curing agent based on products of polyaddition of aliphatic, (cyclo)aliphatic or cycloaliphatic polyisocyanates with urethdione groups and compounds with hydroxyl groups, which is in solid state at temperature below 40°C, in liquid state above 125°C and contains less than 5 wt % free NCO-groups and 3-25 wt % urethdione groups; b) at least one polymer with hydroxyl groups which is in solid state at temperature below 40°C, in solid state above 125°C and has a hydroxyl number of 20-200 mg KOH/g. Components a) and b) are used in a ratio of one hydroxyl group in component b) per 0.3-0.7 urethdione group in component a).
EFFECT: producing technologically effective, nontoxic polyurethane-based prepregs.
18 cl, 4 dwg
SUBSTANCE: epoxy composition of hot hardening for manufacturing fibreglass plastic armouring for the reinforcement of concrete constructions includes an epoxy diane oligomer of brand ED-20 (100 wt.p.), a hardening agent - iso-methyltetrahydrophthalic anhydride (80 wt.p.) and a catalyst of the polymerisation reaction - 2,4,6,-tris(dimethylaminomethyl)phenol (1.5 wt.p.). It additionally contains carbon type nanomaterials (0.05-1.5 wt.p.), representing carbon nanotubes (CNT), or carbon nanofibres (CNF), or a mixture of carbon nanomaterials: fullerene, nanotubes, nanofibres (MCNM), or soot carbon (soot) as a modifying additive.
EFFECT: invention makes it possible to increase mechanical strength, elasticity modulus, alkali-resistance and temperature of vitrification of the obtained products.
2 tbl, 21 ex
SUBSTANCE: invention relates to cyanic ester-based polymer compositions which are reinforced with fibrous filler and are used for producing structural polymer composite materials with operating temperature of up to 200°C and articles from said materials which can be used in aviation, aerospace, motorcar, ship-building and other industries. The invention also relates to prepregs which include said polymer composition and articles made from said prepregs. The cyanic ester-based polymer composition contains epoxy resin, which is a modifier and selected from: epoxy diane resin, epoxy novolac resin, nitrogen-containing epoxy resin or mixtures thereof, wherein components of the composition are in the following ratio, wt %: cyanic ester 55-95, epoxy resin 5-45. The composition can further contain a solvent selected from: acetone, ethyl acetate, isopropyl alcohol or mixtures thereof. The prepreg includes the described polymer composition and fibrous filler, wherein components of the prepreg are in the following ratio, wt %: polymer composition 30.0-50.0, fibrous filler 50.0-70.0. The fibrous filler used in the prepreg can be fabric or bundles or strips based on carbon or glass fibre. An article is made from said prepreg by moulding.
EFFECT: low viscosity of the cyanic ester-based polymer composition when processing and homogeneity of the composition, which enables processing thereof via a prepreg technique and enables to obtain water-resistant articles from polymer composite materials with improved thermomechanical properties, low coefficient of variation of physical and mechanical properties, well retained strength properties at high temperatures (up to 200°C), and reduced shrinkage of the composition during processing.
5 cl, 3 tbl, 12 ex
SUBSTANCE: antifriction composite material consists of a matrix in the form of a crystalline copolymer of ethylene with tetrafluoroethylene and reinforcing filler. As the crystalline copolymer of ethylene with tetrafluoroethylene fluoroplastic-40P with packed density of 0.6 g/cm3 is used and as the reinforcing filler crushed carbon cloth Ural T-22 (UTA) with thermochemical treatment of the fibres and with the following characteristics: breaking load - 1428 N (warpwise), 1071 N (fillingwise) is used. A modifier is added to the composition in the form of molybdenum disulphide (MoS2) powder, with the following ratio of components, wt %: fluoroplastic-40P - 54-55, crushed carbon cloth Ural T-22 - 35-36, molybdenum disulphide - the balance.
EFFECT: improved physical-mechanical and antifriction properties of the material, as well as reduced water absorption.
5 dwg, 1 tbl
SUBSTANCE: method of producing reinforced polymer composite material includes impregnating fibre filler with a mixture of epoxy resin ED-20, polyethylene polyamine curing agent in weight ratio of 9:1, forming a bundle of separately impregnated technical fibres, heat treatment at 30-70°C and further pulsed treatment of the formed bundle with an electrostatic field.
EFFECT: solving problems of improving processing methods when producing polymer composite material, providing innovative technologies based on processes with few steps and low material consumption.
1 dwg, 1 tbl
SUBSTANCE: task of claimed invention is to obtain composite material based on polysulfone, armed with carbon fibrous fillers with improved compression strength, and to elaborate method of its obtaining.
EFFECT: invention makes it possible to increase compression strength of polysulfone carbon re-enforced plastic due to introduction of thermoplastic coupling agent - polyhydroxyether, which increases filler wettability and increases interaction between filler and polysulfonic matrix.
2 cl, 1 tbl
SUBSTANCE: invention relates to field of obtaining prepregs for creation of composite materials based on continuous highly strong high modulus polyethylene fibres from ultrahigh molecular polyethylene, which can be used in different fields of technology, for instance in helicopter building, aviation, automobile building and ship building. Method of obtaining prepreg for composite materials includes processing multifilament ultrahigh molecular fibre or based on it fabric with fluorine-helium mixture under pressure 0.01-0.1 MPa, duration of processing is 1-60 min, temperature of processing is 20-40°C, with further impregnation with polymer binding agents based on epoxy resin. Multifilament ultrahigh molecular polyethylene fibre or based on it fabric undergoes degassing under lower pressure before being processed with fluorine-helium mixture.
EFFECT: invention makes it possible to obtain from prepreg high-quality ultralight highly strong high modulus composite materials, exceeding materials from non-processed fibre in specific properties.
2 cl, 5 tbl, 4 dwg
SUBSTANCE: method involves producing an ultrahigh molecular weight polyethylene-based composite which is reinforced with carbon fibres, with filling ratio of not more than 30 wt %, by forming the composite using a solid-phase deformation technique which involves mixed grinding of a thermoplastic polymer and carbon fibres in a cutting mill. Monolithic samples are made from the composite powder by hot pressing at temperature of 160°C and pressure of 60 MPa.
EFFECT: obtaining composites with improved physical-mechanical and tribological properties.
SUBSTANCE: composite contains 55-75 wt % bagasse fibre with particle size of 40-120 mesh and length to diameter ratio ranging from 3:1 to 5:1 and 25-45 wt % thermoplastic polymer. The bagasse is prepared from a by-product of sugarcane refining. The separated fibres are softened by adding water and grinding. The fibres are then mixed with a thermoplastic polymer and the fibre-polymer mixture is extruded to obtain a composite.
EFFECT: obtaining a high-strength ecologically clean composite which can be used for a long period of time without deformation and colour change.
12 cl, 1 dwg, 1 tbl, 7 ex
SUBSTANCE: adhesive composition in form of an aqueous dispersion with content of solid substances of 10-40 wt % with respect to the adhesive composition, wherein 100 wt % of the solid substance contain a) 1-20 wt % bisphenol-A-epoxy novolac, b) 0-20 wt % of a completely or partially blocked isocyanate, c) 60-92 wt % resorcinol-formaldehyde latex (RFL).
EFFECT: invention enables to obtain a composition with a long working life, good wettability and adhesion on reinforcing inserts.
15 cl, 2 tbl, 2 ex