Strengthening layer for the products made from elastomeric material, preferably for pneumatic tyres of the vehicles and pneumatic tyres of the vehicles
SUBSTANCE: strengthening layer has the plurality of parallel tire cords, spaced apart, and mentioned tire cords are hybrid cords, composed of at least two multifilaments, twisted with each other. The first multifilament is the viscose multifilament, and the other multifilament is non-metallic multifilament, which consists from the material, that is not identical to the first multifilament. The viscose multifilament was subjected to exposure at environmental conditions, determined by the standard DIN EN ISO 139-1: 2005, and after exposure it has the linear density of the filament <1100 dtex and the tensile strength ≥45 sN/tex. The hybrid cord has the cord linear density ≤3000 dtex.
EFFECT: creating from the environmentally friendly material the reinforcing layers in the elastomeric products with high physical properties, in particular its usage in the tires with the relatively low rolling resistance.
14 cl, 2 dwg, 1 tbl
SUBSTANCE: aramide cord thread with breaking loaf of at least 1962 N features 58.8 tex 2×4×3 structure and consists of three strands with unequal number of throwings: first twist of 170-250 throwing/m, second twist of 140-190 throwing/m with SZS twist direction.
EFFECT: higher breaking load and cyclic durability.
FIELD: machine building.
SUBSTANCE: drive belt consists of cord of polyether working in tension. Cord is characterised with heat shrinkage not exceeding 1% at 100°C, and/or heat shrinkage not exceeding 1.5% at 150°C, and/or index of dimension stability not exceeding 6%. The belt possesses heat shrinkage not exceeding 1.5% after 24 hours at 100°C. Index of dimensions stability is calculated as sum of percent elongation at tensile load 4.5 g/i and relative heat shrinkage in air at 177°C.
EFFECT: stability of dimensions, extremely low heat shrinkage.
7 cl, 4 dwg
FIELD: machine building.
SUBSTANCE: produced technical aramid fibre of linear density 58.8 tex has structure 58.8×2×3×3 consisting of three strands with value of twisting: the first and the second twists - 170-210 twisting/metre, the third twist - 80-120 twisting/metre, and direction of twists SZS.
EFFECT: fibre possesses high adhesion connection with rubber and increased breaking load (no more than 1715 H).
4 tbl, 2 ex
FIELD: textile, paper.
SUBSTANCE: invention relates to technology for production of aramid cord thread, and may be used in rubber and tyre industry. Cord thread is produced by twisting of three strands into single complex thread, and strands are represented by twisted thread from heterocyclic paraamid 58.8 tex x 2, having identical 1 11 twists from 130 to 250 tw/metre and direction of twists SSSZ. Additionally, complex thread may contain one strand of polyamide thread of linear density 93.5 tex (HK), twisted with direction of twists (SSS+HK)Z. Cord thread is impregnated with latex-resorcin-formaldehyde composition in amount of 2-15%.
EFFECT: production of high-strength synthetic threads.
3 cl, 3 ex
FIELD: textile, paper.
SUBSTANCE: invention relates to a technique of production of high-strength anide cords used to manufacture tyres and rubber-cord casings in tyre and rubber industry. The production method involves treatment of the anide cord in the hot stretching area at a temperature of 195±5°C and for 31-39 sec with tension of 60-75 kN/cloth. This is followed by thermal stabilisation at 200-210°C with tension of 21-24 kN/cloth for 31-39 sec. This is followed by cooling of the cord cloth to the ambient temperature with tension of 21-24 kN/cloth for 31-39 sec.
EFFECT: invention enables to improve quality of the anide cord and by doing so to improve performance of rubber items.
FIELD: rubber industry.
SUBSTANCE: invention relates to technology of manufacturing rubber reinforcement cord. Cord coating composition comprises first rubber latex, phenol resin, and water-soluble resorcinol-formaldehyde condensation product. Weight percentages of first rubber, phenol resin, and condensation product based on solid components of composition lie in ranges: 30 to 95, 0.01 to 30, and 2 to 15, respectively. First rubber is a nitrile group-containing high-saturated polymer rubber characterized by iodine number 120 or lower. Water-soluble condensation product belongs to novolak type.
EFFECT: increased bend resistance and size stability at room temperature and high temperatures.
10 cl, 1 dwg, 6 tbl, 5 ex
FIELD: method for producing of dimensionally stable polymeric multiple-filament yarn for manufacture of articles used in various branches of industry.
SUBSTANCE: article comprises dimensionally stable polymeric multiple-filament yarn having linear density of at least 7.5 dtex per single filament and retaining strength after fatigue test. Yarn is spun and stretched so that on increasing its linear density per single filament by at least 100% as compared to reference yarn, strength increase extent is kept after fatigue test by at least 19% as compared to reference yarn, for which yarn strength retention after fatigue test is 64%. Linear density of yarn is 3.7 dtex per single filament at twist rate of 19700. Method involves providing availability of polymeric material; spinning multiplicity of single filaments therefrom and forming dimensionally stable yarn from multiplicity of single filaments, said yarn having linear density of at least 7.5 dtex per single filament and retaining strength after fatigue test; spinning and stretching yarn so that strength increase extent is kept after fatigue test per single filament.
EFFECT: increased efficiency and improved quality of yarn and articled produced from said yarn.
27 cl, 5 tbl
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
SUBSTANCE: invention relates to tire cord structure for carriers intended for transportation of heavy cargoes at high speed. Proposed tire consists of at least one ply of metallic reinforcement elements. At least 70% of metallic reinforcement elements of at least one ply of carcass reinforcements are untightened cords displaying at so-called permeability test wear rate smaller than 2 cm3/min. At least 10% of metallic reinforcement elements of at least one ply of carcass reinforcements are cords displaying at so-called permeability test wear rate smaller than 4 cm3/min.
EFFECT: higher fatigue resistance.
15 cl, 7 dwg
SUBSTANCE: tire has tread (1), radial carcass, breaker structure (8) with at least two breaker plies (8a, 8b) and with at least one breaker outer ply (9) arranged radially outside said breaker and composed by continuous coiling of PER-cord (10) in tire circumference. PET-cord (10) features tension of 3-5% at 1.56 cN/decitex at 20°C and stretching of 7-9% at 160°C. Total elongation at breakage of PET-cord (10) and shrinkage at heating to 180°C at thermal tension of 0.01 cN/decitex at duration of effects of two minutes make over 20%. Besides, PET-cord (10) features shrinkage at heating defined at 180°C exceeds 2.5% at preliminary tension of 0.01 cN/decitex and at duration of two minutes.
EFFECT: longer service life and higher durability.
5 cl, 1 dwg, 1 tbl
SUBSTANCE: invention relates to pneumatic tire design, predominantly for heavy trucks, with radial bar-mat reinforcements. Tire tread is connected with two beads (3) via two sidewalls. Metal reinforcing elements of at least one layer of bar-mat reinforcement (2) are non-constricted cords, showing in so called test for permeability the yield of less than 20 cm3/min. In radial plane on at least a portion of tire meridional profile, resin mixture thickness (E) between inner surface of tire cavity and bar-mat reinforcement metal reinforcing element point nearest to the mentioned inner surface of tire cavity is less than or equal to 3.5 mm. Ratio between values of resin mixture thickness between inner surface of tire cavity and bar-mat reinforcement metal reinforcing element point nearest to the mentioned cavity inner surface of two different tire parts exceeds 1.15.
EFFECT: higher fatigue endurance of tire.
21 cl, 4 dwg
SUBSTANCE: in carcass (13) between the first sections (13A) where intercord distance between body section and turned over sections is gradually decreasing outwards in radial direction of tire, and the second sections (13B), where intercord distance is gradually increasing, the first sections (13C) are located with invariable distance, in which sections the turned over sections (14B) are shifted closer to body section (14A) which actually becomes neutral bending axis, and where intercord distance is constant, so that compression force acting on cords of turned over sections (14B) can be decreased.
EFFECT: higher wear resistance of bead sections in pneumatic tire.
7 cl, 6 dwg, 5 tbl
SUBSTANCE: invention relates to run-flat tires. Proposed tire comprises carcass 6 and cord layer, and reinforcing tread arranged radially outside. Carcass 6 consists of carcass layer 6a composed of aramide fibre cover 20 arranged at 45° to 90° to tire lengthwise axis on rubber cover layer. Preferably, carcass each cord 20 has two-bundle twisted structure made by final twisting of two pre-twisted bundles of threads. It is also preferable that each said cord has twist factor T defined by formula
varying from 0.5 to 0.7 where N is the number of final twists (number of turns /10 cm), D is total linear density, dtex, while ρ is cord material density.
EFFECT: increased heat resistance, longer life.
8 cl, 8 dwg, 1 tbl