FIELD: human vital needs satisfaction.
SUBSTANCE: coin-like article with a polished and/or embossed surface containing sections on which the microrelief is applied is proposed. The microrelief is an ordered set of protrusions and hollows with a size of 0.5-5.0 mcm, which is a constituent part of the decoration of the article external appearance. When the halogen lamp is exposed to the full light range at an angle of 45 degrees to the coin-like article surface, intensity of the beam reflected from the surface area with the applied microrelief has is at least 48% lower than the intensity of reflection from the surface area of the article without a microrelief.
EFFECT: creation of articles containing a security feature with an increased degree of protection due to the reliability of its determination and presence of the said protective feature in the composition of the external appearance of the article.
4 cl, 7 dwg
FIELD: packaging industry.
SUBSTANCE: method of manufacturing high-barrier metallised co-extruded film comprises the formation of successive layers of material. On the upper pretreated surface of one of which, made of biaxially oriented polypropylene, a metallised layer is applied in a vacuum, with an optical density of 2.4 and thickness 120÷140 mcm, and on its lower surface with a temperature of 105÷140°C the heat sealable layer is applied. In addition, the method comprises formation of an oxygen-shielding vapour-water-resistant barrier layer which is attached with an adhesive to the untreated layer of low pressure polyethylene.
EFFECT: method enables to obtain a film having good barrier properties to UV radiation, low friction coefficient, low permeability to oxygen and water vapour, which enables to store the product packed in it for a long time without losing its quality.
11 cl, 1 tbl
FIELD: process engineering.
SUBSTANCE: invention can be used for fabrication of super laminar blanks based on diverse materials. Initial blanks are composed of sheets of diverse metal alloys mutually soluble in the range of heating temperatures at hot forming. After cutting initial sheets to lengths, their surfaces are processed and cut sheets are stacked. At stacking, higher fusion point metal sheet is arranged between sheets of lower fusion point metal to make the barrier for crystallization in single ply depth to form a nano-sized structure. Sais stack is hot formed by heating and rolling at recrystallisation temperature corresponding to the lowest fusion point material. Said jobs are reiterated unless sandwiched sheet of produced with preset number of plies and depth.
EFFECT: sandwiched sheets produced without degassing.
SUBSTANCE: coating contains at least six components, i.e. nickel, cobalt, phosphorous, chemical compounds of nickel with phosphorous - Ni3P, Ni5P2, Ni2P, and comprises several alternating layers, at that odd layers are solid phosphorous solution in nickel, and even layers are solid solution of phosphorous in cobalt, at that interrelationship of the alternating layers is ensured due to jointing of next layer matrix with the previous layer matrix. In the odd layers of the coating the particles of nickel, phosphorous, chemical compounds Ni3P, Ni5P2, Ni2P have size within range from 40 to 1000 nm. In even layers of the coating the cobalt and phosphorous particles have size from 300 to 5100 nm.
EFFECT: multi-layer composite coatings have high microhardness and corrosion-resistance.
4 cl, 1 dwg, 2 tbl, 4 ex
SUBSTANCE: invention relates to the field of nanotechnology, namely to electronic elements consisting of the layers and containing nanomaterials in their structure. In the electronic element, comprising layers of materials with conductive and nonconductive parts, at least one layer is made of a metal matrix composite containing 25-75% (by volume) of reinforcing particles consisting of nanodiamonds with high electrical resistance and bulb-shaped carbon nanoparticles with low electrical resistance, arranged in order providing the flow of electric current in the desired direction. In the method of manufacturing of electronic elements, consisting of layer application of required materials, at least one layer is made of a metal matrix composite produced by the method of mechanical alloying of the initial particles of the matrix material and 25-75% (by volume) of nanodiamond particles, at that first the granules of composite material are obtained, then the composite material is applied on the preliminary treated process surface, the surface alignment is carried out, then local heating of those areas that need to be conductive is carried out to temperatures exceeding 1000°C, thereby transforming nanodiamonds in bulb-shaped carbon nanoparticles.
EFFECT: reduction in the size of electronic elements.
SUBSTANCE: under this method on steel surface a multilayer coating is applied, in it nickel-phosphorous layers are applied as odd layers, and cobalt-phosphorous layers are applied as even layers. Ni-P layers are precipitated from the solution with pH 4.1-4.3 and containing: nickel sulphate 10-30 g/l, sodium hypophosphite 15-25 g/l, sodium acetate 10-20 g/l, thiourea 0.005 g/l, acetic acid 13 ml/l. At that Co-P layers are precipitated from solution with pH 8.0-8.5 and containing in g/l: difluoride cobalt 15-35, sodium hypophosphite 10-22, sodium citrate 80-100, ammonium chloride 30-60. The mentioned layers precipitate at temperature 70-92°C.
EFFECT: method ensures making on the steel surface of multilayer composite coatings out of different quantity of alternating layers with increased corrosion resistance and microhardness.
2 cl, 2 tbl, 1 dwg, 4 ex
SUBSTANCE: invention relates to the technology of producing a foamed composite element. The method includes a step of providing a coating layer, depositing an adhesive agent on the coating layer and depositing a layer of foam material containing polyurethane and/or polyisocyanurate on the layer of adhesive agent. The layer of adhesive agent contains modified isocyanate. The modified isocyanate in the layer of adhesive agent has, during deposition, content of free isocyanate groups from ≥10% to ≤29%. The invention also relates to use of the modified isocyanate with content of free isocyanate groups from ≥10% to ≤29% as an adhesive agent when producing foamed composite elements, and to foamed composite elements obtained using said method.
EFFECT: providing high bonding strength between foam material and coating layers.
15 cl, 17 ex, 2 tbl
FIELD: process engineering.
SUBSTANCE: set of inventions relates to security elements designed to protect documents, securities, polygraphic products etc, against counterfeit. Security element comprises outer transparent polymer base with transparent lacquer ply secured thereto and provided with micro relief with thin layers of reflecting and magnetic materials applied thereto. External transparent laminar ply is bonded to said layers with the help of adhesion layer. Depth of micro relief makes 0.01 mcm to 0.5 mcm. Micro relief represents a system of alternating magnetic strips. Security element cam additionally comprises transparent protective breakable ply. Sais security element can comprise two or more plies of magnetic material. Note here that latent info in every magnetic ply differs from latent info in other magnetic layers.
EFFECT: security element resistant to mechanical, chemical and thermal effects, reliable identification.
8 cl, 1 dwg
SUBSTANCE: below given operations are performed: preliminary application of aluminium or aluminium alloy onto a steel strip; cutting of the above steel plate or the strip with preliminary coating for production of a steel workpiece with preliminary coating; heating of the workpiece in a pre-heated furnace to the temperature and during the period of time according to the diagram in compliance with thickness of workpiece at average heating speed Vc in temperature range of 20 to 700°C, which equals to 4 to 12°C/sec and at heating speed Vc' in temperature range of 500 to 700°C, which equals to 1.5 to 6°C/sec; then, movement of the above heated workpiece to a stamping press; hot forming of the heated workpiece in the stamping press to produce a hot-formed steel plate product; cooling of the heated workpiece from the furnace outlet temperature to the temperature of 400°C at average cooling rate of at least 30°C/sec.
EFFECT: improving corrosion stability of a plate steel product and providing improved weldability.
13 cl, 1 dwg, 2 ex
FIELD: process engineering.
SUBSTANCE: invention relates to production of composites for heat sinks of semiconductor devices, in particular, Al-SiC composite with metal coating. Proposed method comprises impregnation of SiC powder with the melt of aluminium or aluminium alloy and diffusion bonding of impregnated blank with aluminium foil arranged at least one side of said blank wherein SiC powder is used as heat removal base of porous blank, placing of aluminium foil on said blank before impregnation and combining diffusion bonding with impregnation. Porous blanks with aluminium foil can be assembled in package of two and more porous blanks. Porous blanks of said package are separated by metal plates with melting point higher than that of aluminium or aluminium alloy.
EFFECT: accelerated process cycle, higher process efficiency, lower costs.
5 cl, 1 tbl, 4 ex
FIELD: process engineering.
SUBSTANCE: invention relates to production of multilayer antirust structures. Proposed article comprises, at least, one steel layer, antirust layer, foam plastic layer and layer of dried wood fibers. Proposed method comprises making work pieces, preparing panels of flaps and applying powder coating. Coiled steel is precut into strips to be leveled and stretched before coiling so that roll is placed on unwinder, steel strips are leveled, leveled strip is fed to roll mill whereat rolls deform it to required shape. Steel section is cut to work pieces of required size. Billets of article box are made from cold-rolled or hot-rolled steel and functional openings are punched in said billets. Metal surface is pretreated by dipping steel layers in baths in turns during application of paint layer in polymerisation tunnel or cyclic chamber for reliable bonding of metal with said layer. Then, said surface is washed by water. To remove oxides and rust metal surface is etched by acid for 15-30 minutes. Then, it is washed by water again. Acid etching effects are neutralised by dipping in bath for 3-5 minutes and washing by water with subsequent conditioning in bath with liquid solution. Then, phosphatising is performed to produce zinc-phosphate rustproof film. Then, painting or applying transfer coating is carried out with the help of powder polyether dye based on carboxyl-bearing saturated polyethers containing film-forming agent in amount of 50-60 wt %, pigment and filler - 35-50 wt %, other additives and admixtures making the rest. Layer of wood dried fibers are treated by synthetic binders and compacted to mat to be shaped to straps of MDF applied on inside or outside of multilayer articles.
EFFECT: higher reliability, antirust protection.
6 cl, 15 dwg
FIELD: machine engineering, possibly manufacture of articles including parts of iron and its alloys operating in aggressive media.
SUBSTANCE: part has coating formed by micro-plasma oxidation on sub-layer containing aluminum. Said sub-layer includes layer of solid solution of aluminum in α-iron formed by aluminizing of part surface and layer of alumina formed by heating at temperature 800 - 900°C in air atmosphere of aluminized surface of part. Invention provides enlarged range of working temperatures of parts subjected to micro-plasma oxidation till 900°C.
EFFECT: elimination of iron oxides formation in micro-plasma coating of steel and cast-iron parts, enlarged assortment of parts with micro-plasma coating operating in condition of high temperature and gas corrosion.
FIELD: rocketry; aircraft industry; method of manufacture of the multilayer product used at the cryogenic temperatures and/or in the condition of the aerodynamic heating.
SUBSTANCE: the invention is pertaining to the production technique of the multilayer products, which may be used in the fields of engineering, in which the products are working at the cryogenic temperatures and-or in the conditions of the aerodynamic heating. The product working at the cryogenic temperatures contains the metallic shell with the layer of the thermal insulation made in the form of the foam plastics. Between the metallic shell and the layer of the foam plastics there are the anticorrosive layer and the shock-absorbing layer. The foam plastics is additionally consolidated by the net installed with usage of the glue, and atop of it there is the antistatic coating. The product working at the cryogenic temperatures and additionally in the conditions of the aerodynamic heating contains the metallic shell with the layer of the thermal insulation made in the form of the foam plastics and the layer of the heat protection made out of the heat-protective coating consisting of the glue - Elastsil 137-180 and phenolformaldehyde microbeads (ТПШ-ЭС) deposited on the glue-hermetic, and atop of it there is the antistatic coating. The method of manufacture of the multilayer product consists that on the metallic surface they in series deposit the anticorrosive layer and the shock-absorbing layer, as the foam plastics they sputter Izolan-123 at the pressure of 0.4-0.6 mPa layerwise and then apply the glue-hermetic, overlay and then fix the molded cut sheets of the thermal-protective coating ТПШ-ЭС, age at the temperature of 15-35°С within 24 hours and atop of them deposit the antistatic coating - the enamel ХП-5237.
EFFECT: the invention ensures that the manufactured multilayer product is successfully working at the cryogenic temperatures and-or in the conditions of the aerodynamic heating.
4 cl, 2 dwg, 2 tbl, 2 ex
FIELD: manufacturing processes in machine engineering, namely manufacture of three-layer structures of metals and composition materials, for example glass reinforced plastics with corrugated filler.
SUBSTANCE: three-layer structure includes two carrying layer, one of said layers is made of plastics, and corrugated filler between layers. Second carrying layer and corrugated filler are made of the same metal clad with glass-reinforced plastics. Thickness of cladding glass reinforced plastics of carrying layer and in filler is no less than 0.4 mm. In cavities of corrugated filler there is porous material joined with filler and having density 0.05 - 0.3g/cm3. Carrying layer of metals clad with glass-reinforced plastic is joined with filler by welding through metal in tops of filler. Carrying layer of glass- reinforced plastics is joined with filler through cladding of glass-reinforced plastics along top portions of filler and along surface of porous metal. Metal of filler may be perforated with perforation factor no more than 0.7.
EFFECT: improved technical parameters of ships built with use of such three-layer body structure, lowered mass, increased carrying capacity and enhanced operation conditions of ships.
2 cl, 1 dwg, 1 tbl
SUBSTANCE: invention relates to adhesive epoxy coating of metallic substrate, to layer structure containing such coating and also relates to the method of metal paper reinforcement. Coating is prepared from two-can epoxy composition. The composition contains epoxy material with 25% of total solids and hardening material with 32% of total solids. Epoxy material contains the following components: 3-35% of liquid diglycidyl ethers diphenol-A, 35-60% of solid diglycidyl ethers diphenol-A, 10-30% of epoxy novolac resin and 5-18% of solid butadiene acrylonitrile resin elastic with terminal carboxyl. Hardening material is chosen from a group including up to 0.2% chrome octoate and 4.4'-diaminodiphenylsulfone or its blend. This composition is used as adhesive while deriving layer structure of metallic element/fiber class. Thickness of adhesive coating in layer structure is 0.00254 cm. The method of metallic element reinforcement includes preparation of metallic element surface and application of above mentioned epoxy composition.
EFFECT: thin adhesive coating is derived and economic way of strong adhesion is developed.
14 cl, 2 dwg
FIELD: technological processes.
SUBSTANCE: invention concerns composite structure, method of its obtainment, and application. Composite structure is a sandwich structure consisting of two outer structural layers L1 and L3 and one inner lightening layer L2, made of solid or semisolid polyamide foam. Structural layer is a plate or sheet made of thermoplastic or heatset polymer matrix reinforced by reinforcement fiber, or a metal or metal alloy plate or sheet. Method of obtaining composite structure involves conjunction of the following elements: structural layer L1, lightening layer L2 of polyamide foam or the said foam precursor, structural layer L3. Composite structure can be applied in car or airplane part manufacturing, or production of sports gear, such as ski, or in construction panel manufacturing.
EFFECT: obtaining hard and light reusable composite structure.
20 cl, 6 ex,1 dwg
SUBSTANCE: invention concerns nano-structured coatings for stainless steel and can be used at operation of stainless steel in the capacity of materials for constructional and technological purposes of petrochemical industry. Coating contains a layer made of titanium nitride and intermediate layer made of silicon carbide of thickness from 5 till 10 nm. Layer made of titanium nitride has thickness from 25 till 50 nm, and layer made of silicon carbide - from 5 till 10 nm. Coating has total thickness 30-60 nm and total content, wt %: SiC - 16.6 and TiN - 83.4.
EFFECT: increasing of materials corrosion resistance at operating in acid environment and at higher temperature.
SUBSTANCE: invention is related to method for manufacture of combined elements, which consist of one protective layer and one rigid plastic foam on isocyanate basis, between which adhesion promoter is applied. Method provides for continuous displacement of protective layer with serial application of adhesion promoter on it and initial material for rigid plastic foam on isocyanate basis. Adhesion promoter is applied by means of rotary disc installed preferably parallel to protective layer in horizontal plane or with deviation from it that does not exceed 15°.
EFFECT: produced elements have high adhesion strength.
24 cl, 2 tbl, 3 dwg
SUBSTANCE: invention refers to production of multi-layer structures. The method consists in the stage of producing a composition containing powder of alloy Fe-Cr and at least one of oxides Fe, Cr, Ni, Co, Zn and Cu. The first layer is formed out of the said composition. At least one additional layer out of the same composition is formed on one of the sides of the first layer; this additional layer differs by chemical contents and/or by at least one of properties chosen from porosity and degree of shrinkage. Further the said layers are subject to heat treatment in atmosphere containing oxygen and are sintered in reduction atmosphere. Also amount of iron in finished material corresponding to the first layer is 50-90 wt % in ratio to total weight of finished material after sintering.
EFFECT: control over shrinkage and porosity.
18 cl, 2 dwg, 1 tbl, 2 ex
SUBSTANCE: polyurea coating composition is obtained from a reaction mixture which contains an isocyanate functional component and an amino functional component, where the ratio of equivalents of isocyanate groups to equivalents of amino groups is greater than 1, volume ratio in the mixture of the isocyanate functional component to the amino functional component is 1:1, in which at least one polyisocyanate monomer constitutes at least 1 wt % of the isocyanate functional component, where the isocyanate functional component contains the reaction product of polyisocyanate and at least two polyols, and the amino component contains an aspartate-based amino functional reactive resin. The multicomponent composite coating contains a first polyurea layer which is deposited from the first composition, and a second polyurea layer which is deposited from the second composition, in which at least one composition, chosen from the first composition and second composition, includes a polyurea coating composition.
EFFECT: obtaining compositions which improve adhesion to earlier deposited coatings or to a substrate, characterised by low viscosity, which improves fluidity of the coating composition for a long period of time.
24 cl, 3 dwg, 1 tbl, 1 ex
FIELD: production processes.
SUBSTANCE: blemished surface is covered with polyester resins Derakane 8084 as primer coat, after drying surface is covered with at least two layers of powder-bonded glass-fiber mat and three layers of surface film as reinforcing layer, these layers are resinated by Derakane 411-350, rolled, after drying protecting cover as wax top coat based on isophthalic polyester is applied.
EFFECT: improvement of coating service life.
3 cl, 1 dwg