Fibre prepreg for making wear-proof polymer composite material (versions)

FIELD: chemistry.

SUBSTANCE: present invention pertains to machine building, and particularly to fibre prepreg, used for making objects for various purposes from wear-proof polymer composite material. The fibre prepreg is made in form of a fibre base from fusible, as well as glass or carbon fibres of infusible threads. The fibre base is made from a complex thread, weaved from fusible and infusible fibre. The fusible fibre in the complex thread is ultrahigh-molecular polyethylene, or polypropylene, or polyethylene caproamide or polyethyelene terephthalate. The infusible fibre in the complex thread is polyoxadiazole fibre and cotton fibre, or polyparaphenylene terephthalamide fibre or polymetaphenylene terephthalamide fibre. The prepreg is made in form of a sheet (fabric), ribbon, linen, non-woven material or cut thread. Part of the fusible fibre in the complex thread can be substituted with powder or granules of fusible material.

EFFECT: design of a fibre prepreg, use of which increases the longevity of different components, made from the prepreg.

9 cl, 3 tbl

 

The text descriptions are given in facsimile form.

1. Fibrous prepreg for the manufacture of wear-resistant polymer composite material, made in the form of fibrous basis of the s of fusible and infusible fibers, while infusible fiber prepreg made of glass or carbon fibers, wherein the fibrous base is made of multifilament yarn, woven fusible and infusible fibers, the fusible fiber complex thread contains fiber ultra-high molecular weight polyethylene, or polypropylene, or polyethylenepolyamine or polyethylene terephthalate, and as infusible fiber complex thread further comprises polyoxadiazole fiber or cotton fiber, or a mixture polyoxadiazoles and cotton fibers, or polyparaphenyleneterephtalamide fiber, or polymethylenepolyphenylene fiber, and the content of the fusible fibers in it mixed with infusible fiber multifilament yarn selected from 1 to 99 parts by weight of and the prepreg is made in the form of a sheet (fabric, ribbon, canvas, non-woven fabric or cut threads.

2. The prepreg according to claim 1, characterized in that the portion of the fusible fiber multifilament yarn may be replaced by a powder or pellet of fusible material multifilament yarn, and the content of powder or granules is selected in the amount of 0.11 to 0.92 on the number of fusible thread.

3. The prepreg according to one of claims 1 or 2, characterized in that the content polyoxadiazole fibers in it mixed with cotton fiber multifilament yarn selected from 20 to 80 mA is C

4. Fibrous prepreg for the manufacture of wear-resistant polymer composite material, made in the form of a fibrous basis of fusible and infusible fibers, while the infusible fiber prepreg made of glass or carbon fibers, wherein the fibrous base is made of multifilament yarn, woven fusible and infusible fibers, the fusible fiber complex thread contains fiber ultra-high molecular weight polyethylene, or polypropylene, or polyethylenepolyamine, or polyethylene terephthalate, and as infusible fiber complex thread further comprises polyoxadiazole fiber or cotton fiber, or a mixture polyoxadiazoles and cotton fibers, or polyparaphenyleneterephtalamide fiber, or polymethylenepolyphenylene fiber, and the content of the fusible fibers in it mixed with infusible fiber multifilament yarn selected from 1 to 99 parts by weight, and further comprises a thermosetting binder in the amount of 9-87 parts by weight, which is used as a phenol-formaldehyde resin in the form of a Novolac form, or phenol-formaldehyde resin in the form of rezol form or polyester resin, and the use of Novolac form a phenol-formaldehyde resin as a curing agent further the use of hexamethylenetetramine in the number 5-18 parts by weight of from the content of thermosetting binder, and the prepreg is made in the form of a sheet (fabric, ribbon, canvas, non-woven fabric or cut threads.

5. The prepreg according to claim 4, characterized in that the portion of the fusible fiber multifilament yarn may be replaced by a powder or pellet of fusible material multifilament yarn, and the content of powder or granules is selected in the amount of 0.11 to 0.92 on the number of fusible thread.

6. The prepreg according to one of claims 4 or 5, characterized in that the content polyoxadiazole fibers in it mixed with cotton fiber multifilament yarn selected from 20 to 80 parts by weight of

7. The prepreg according to claim 4, characterized in that it may further comprise a powder filler is silica in the form of a white amorphous soot (Aerosil), or marshalite, or colloidal silica in amounts of from 0.01 to 14.95 parts by weight with a particle size of from 3 to 10000 nm.

8. The prepreg according to claim 4, characterized in that it may further comprise an adhesive polyvinyl acetate or polyvinyl butyral in an amount of from 0.01 to 11,85 parts by weight of

9. The prepreg according to claim 4, characterized in that it may further comprise a release agent is oleic acid, or zinc stearate, or calcium stearate in an amount of from 0.01 to parts by weight 2,05



 

Same patents:

FIELD: textiles, paper.

SUBSTANCE: leno cloth has, at least, threads of an earthen basis, thread of an intertwined basis and weft thread. Weft threads and threads of an earthen basis are placed without gaps. Weft threads through leno cloths, which have considerably less titer in comparison with threads of an earthen basis, which are bound with tension, whose value is so much less than the tension of threads of an earthen basis, which has intertwined leno cloth with threads of an earthen basis, subjected to binding, placed in a plane, parallel to the plane of the maximum thickness of weft threads. Leno threads have a higher ratio of earning than threads of an earthen basis. Invention includes a method of manufacturing leno cloth, and also a loom for realising the method of manufacturing leno cloth.

EFFECT: making leno cloth, whose face and back sides have different functional properties and which would be easy to manufacture and available for different fields of use.

21 cl, 11 dwg

FIELD: textiles, paper.

SUBSTANCE: invention relates to manufacturing o geo-textiles, used for reinforcing slopes for automobile and other roads, for quick securing of erosive earth or slopes due to planting on them grass and other plants. Web contains plant seeds, which are spun in the yarn, forming a structure of the textile web, and the web is saturated with fertiliser. The web can be fabric, woven or non-woven.

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4 cl

FIELD: textiles, paper.

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41 cl, 7 dwg

FIELD: textiles, paper.

SUBSTANCE: invention relates to moulding fabric for the moulding part of the paper-making machine. Fabric has an upper and lower layer of beam threads, passing in the direction of the movement of the fabric in the machine, and weft threads, passing in a direction perpendicular to the direction of the movement of the fabric in the machine, and also three connecting threads, passing in the direction, perpendicular to the direction of movement of fabric in the machine and intertwined with the upper and lower layers of fabric. Three connecting threads allow for the obtaining a linen weave in the upper layer, which reduces the level of marking of the paper web of the moulding fabric and improves the load bearing capability of the moulding fabric as bases of fibres.

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13 cl, 5 dwg

FIELD: textiles, paper.

SUBSTANCE: invention relates to moulding fabric for the moulding part of the paper-making machine. Fabric has an upper layer of weft threads and a lower layer of weft threads, passing in a direction perpendicular to the direction of the movement of the fabric in the machine. Upper (moulding) layer and lower (side of wear and tear) layer are joined forming a multilayered fabric. Compacting threads, passing in a direction perpendicular to the direction of movement of fabric in the machine, set between adjacent weft threads on the side of wear and tear. Compacting threads reduce the volume of emptiness on the side of wear and tear of the fabric without a considerable disruption to the air permeability and increasing the thickness of the fabric. This arrangement of compacting threads also leads to the increase in transverse strength and seam strength and reduces transverse movement of weft threads on the side of wear and tear.

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12 cl, 9 dwg

FIELD: textile fabrics, paper.

SUBSTANCE: invention is related to textile industry, in particular to creation, solid-woven casings of complex three-dimensional configuration. Solid-woven casing comprises combination of two-strand texture and three-strand texture. Two-strand texture is used in sections with zero curvature of surface, three-strand texture - in sections of casing with curvature different from zero, which includes three systems of main strands and additional shape-generating strands.

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1 dwg

FIELD: chemistry.

SUBSTANCE: glass cloth consists of main and filling threads comprising multiple glass fibres. At least one of two specified threads, either main or filling thread, is not twisted with glass fibre profile being flattened. Method includes production of glass cloth used for prepreg and printed circuit boards.

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9 cl, 9 dwg, 1 tbl

FIELD: textile fabrics.

SUBSTANCE: at least one permanent fold is formed in fabric, in which at least one shrinkage thread is weaved in. Shrinkage thread or shrinkage threads are laid in fabric in general in direction that is transverse to the area of fold creation.

EFFECT: increase of fabric production rate and reduction of its production cost.

5 cl, 6 dwg

Filtering cloth // 2340387

FIELD: textile.

SUBSTANCE: invention is related to production of filtering materials, that can be used when cleaning hot process gases and industrial air at excess temperature (up to 300°). Filtering cloth is weaved at loom by herringbone weaving pattern of the main and filling threads. Surface density of filtering cloth is from 250 to 350 g/m2, threads density in 10 cm section is from 310 to 330 in base and from 180 to 200 in weft . Additionally, air permeability of cloth is from 40 to 200 dm3/m2 s.

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2 cl, 2 ex

FIELD: textile industry, paper industry.

SUBSTANCE: invention relates to the technology of metallised material production for shielding from electromagnetic radiation in a broad range. Metallised material ''Nanotex'' is made of synthetic monofilament thread with diameter of 30-50 micron, and a number of threads is 30-160 threads per cm and surface density is 10-50 g/m2. Material has orifices between beam threads and shoots, size of which ranges within 1d-9d, where d is thread's diameter. Metal pads with predetermined surface resistance can be distributed over the material by weave or woven methods. The invention ensures production of the material with stable performances having high shielding capacity from different types of radiation including high-frequency radiation ranged from 300 to 16000 MHz.

EFFECT: production of the material with stable performance having high shielding capacity from different types of radiation.

3 cl, 2 dwg, 1 tbl, 5 ex

FIELD: technological processes.

SUBSTANCE: method includes application of adhesive strips in longitudinal direction on initial material cloth, its cutting into stocks in direction that is perpendicular to adhesive strips, honeycomb packet assembly from stocks by means of packing with displacement of every stock in relation to adhesive strips adjacent by half of pitch, adhesion of honeycomb packet stocks according to preset mode, stretching of honeycomb packet and its impregnation with polymer binder, drying of impregnated honeycomb packet on air with further hardening of polymer binder, at that as initial material glass tissue is used, after honeycomb packet impregnation with polymer binder its excess is removed by free flowing to the moment of sharp reduction of flowing binder amount, stretched honeycomb packet is turned over by 180°C, and surplus of polymer binder flows into its cells from the top end of honeycomb packet for the time equal to 1/3 of the time spent for previous flowing, once again stretched honeycomb packet is turned over by 180°C, and surplus of polymer binder flows from the other end of honeycomb packet in its cells for 1 minute, stretched packet is turned over by 90°C, while channels of cells are located horizontally, and drying of impregnated honeycomb packet is performed for at least 3 hours at room temperature by means of stretched honeycomb packet cells blowing with organised air flow directed to exhaust ventilation.

EFFECT: method provides high interlayer strength and eliminates exfoliation in adhesive strips; uniform strength and density in the whole volume of honeycomb and provision of air drying process intensity.

1 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: binding agent includes components at the following ratio, weight parts: epoxy diane resin or its mix with diglycidyl diethyleneglycol ether 18-50, polyfunctional epoxy resin 18-60, bromine-containing epoxy diane resin 18-34, bis-N,N-(dimethylcarbamido)diphenylmetane as solidifier 3-6, alcohol and acetone mix as organic solvent 70-105. Bromine-containing epoxy diane resin is an oligomer product of tetrabromdiphenylolpropane and epychlorhydrine condensation in 600-1500 mol mass amount in the form of diglycidyl tetrabromdiphenylolpropane ether mix with its dimmer and trimer at the component ratio of (3-4):1:(0.2-0.8) or diglycidyl tetrabromdiphenylolpropane ether mix with its dimmer, trimer and chlorhydrine ether at the component ratio of (3-4):1:(0.2-0.8):(0.5-0.6). Prepreg includes components at the following ratio, wt %: epoxy binding agent described above 30.0-42.0, and fiber filler 58.0-70.0. An article is produced by prepreg modelling.

EFFECT: increased stability of binding agent solutions and improved durability properties of composition materials and articles made of them.

3 cl, 3 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: first version of invention claims composition of the following component ratio, wt %: N,N,N',N'-tetraglycidyl-4,4'-diamino-3,3'-dichlordiphenylmethane 24.8÷42.1 and triglycidyl-aminophenol as polyfunctional epoxy resins 11.5÷25.8, polycrystalline powder of N,N'-hexamethylenebismaleimide as bismaleimide 25.8÷41.3, polycrystalline powder of 4,4'-diaminodiphenylsulfone as solidifier 17.4÷22.6. Second version of invention claims composition of the following component ratio, wt %: N,N,N',N'-tetraglycidyl-4,4'-diamino-3,3'-dichlordiphenylmethane 21.6÷49.5 and triglycidyl bisphenol-A ether as polyfunctional epoxy resins 16.1÷32.4, polycrystalline powder of N,N'-hexamethylenebismaleimide as bismaleimide 3.5÷27.0, polycrystalline powder of 4,4'-diaminodiphenylsulfone as solidifier 19.0÷25.8. Method of obtaining the claimed compositions involves addition of polycrystalline 4,4'-diaminodiphenylsulfone powder to homogenous polyfunctional epoxy resin melt during stirring at 120÷130°C in minimum time sufficient for its complete dissolution. Then the temperature of obtained homogenous melt is lowered to 90÷100°C. By further stirring polycrystalline powder of N,N'-hexamethylenebismaleimide is added to the melt in minimum time sufficient for its complete dissolution. Prepreg includes components at the following ratio, wt %: the claimed epoxybismaleimide binding agent 20-48 and fiber filler 52-80. An article is produced by the claimed prepreg modelling.

EFFECT: improved durability of binding agent and increased vitrifying temperature and flexural strength of article.

6 cl, 2 tbl, 10 ex

FIELD: technological processes.

SUBSTANCE: glue strips are applied with preset pitch onto glass tissue cloth in longitudinal direction, then they are dried, and glass tissue with applied glue strips is cut into preforms in direction that is perpendicular to glue strips, honeycomb packet is assembled from prepared preforms by laying with displacement of every preform in respect to glue strips that are adjacent by half of pitch, preforms of honeycomb packet are glued at preset temperature and pressure, and honeycomb unit is produced by means of honeycomb packet extension, then prepared extended honeycomb unit is soaked with polymer binder, it is hardened in accordance with preset mode, at that as glass tissue thin glass tissue is used on the basis of fibres made of alumina-borosilicate alkali-free glass of "А-5Пx90" or "А-4Пx90" type, for glue strips phenol-polyvinyl-acetal glue is used of BF-2 type with viscosity of 45 by viscosity gage VZ-246, gluing of honeycomb packet preforms is carried out under vacuum of 0.12-0.16 kgf/cm2 according to temperature-time mode: heating up to temperature of 80°C with further pause of 30 minutes, heating up to temperature of 150°C with further pause of 60 minutes, heating up to temperature of 170°C with further pause of 120 minutes, as polymer binder for soaking, bakelite lacquer is used of LBS-1 brand with viscosity of 15 by viscosity gage VZ-246, hardening of honeycomb unit soaked with polymer binder is carried out in accordance with the following mode: heating up to temperature of 100°C with further pause of 30 minutes, heating up to temperature of 150°C with further pause of 90 minutes, heating up to temperature of 170°C with further pause of 120 minutes.

EFFECT: provision of honeycomb filler compression strength; expansion of assortment of manufactured honeycomb filler and increase of manufacturability.

1 tbl, 6 ex

FIELD: technological processes.

SUBSTANCE: method includes the following: viscose or polyacrylonitrile technical thread is soaked with the mixture of epoxy resin ED-20 and hardener polyethylene polyamine with mass ratio 9:1. Then bundle is formed out of separately soaked technical threads with the number of threads of 100-140 and is thermally treated at the temperature of 30-70°C. At the same time the shaped bundle is exposed to ultraviolet radiation with power of 0.70-0.80 Watt/m3 at the wave length of λ=253.7 for 8-12 minutes, and then hardened.

EFFECT: increases breaking stress during static bending of materials with polyacrylonitrile technical thread.

2 tbl

FIELD: construction engineering; mechanical engineering; rocketry; space engineering for fire safety of articles.

SUBSTANCE: proposed binder contains components at the following ratio, parts by mass: epoxy-dian resin, 100; aniline-phenol-formaldehyde resin used as hardening agent, 80-100; urethane prepolymer used as modifying agent, 50-65; 3,3'-dichloro-4,4'-diamino-diphenyl methane used as hardening agent, 8-15; 2,2'-bis(3,5-dibromo hydroxyphenyl) propane, 120-140; solvent, 225-290. Used as solvent is alcohol-acetone mixture at mass ratio of alcohol to acetone of 1:1.

EFFECT: reduction of gelatinization time; production of prepreg on base of this binder at high life time and difficultly combustible plastic at high ultimate strength.

8 ex

FIELD: resins, chemical technology.

SUBSTANCE: invention relates to technology for preparing molded articles, in particular, a polishing disk comprising fabric interlayers that are impregnated with a thermoreactive synthetic resin-base binding agent. Binding agent used for impregnation represents thermoreactive resin alcoholic solution or mixture of resins, or mixture if resins with a hardening agent. Before the impregnation process 1-15% of additive is added to the solution chosen from group of fatty acid amides or fatty acid substituted amides as measured for amount of resin or mixture of resins, or mixture of resin with a hardening agent. Invention provides simplifying process for stacking articles, possibility for their repeated separation one from another and without decreasing their quality.

EFFECT: improved preparing method.

7 cl, 1 ex

FIELD: chemistry of polymers.

SUBSTANCE: invention relates to a polymeric binding agent for composition materials used as structural materials in machine engineering, aircraft construction and instrument making. Binding agent comprises the following ratio of components, mas. p. p.: epoxy resin ED-20, 50-60; phenolformaldehyde resin RFN-60, 40-50, and additive, 6-7. Mixture of triethanolamine (6 mas. p.) and salicylal-5-methoxy-8-aminoquinoline (0.5 mas. p.) is used as an additive. Invention provides decreasing hardening time, to enhance bending strength and reduce the friction coefficient of the proposed composition material.

EFFECT: improved and valuable technical properties of material.

2 tbl, 3 ex

FIELD: production of prepreg on base of cores of carbon, glass and organic fibers or their combination, as well as fabrics of various interweaving for manufacture of transport facilities, aircraft and spacecraft.

SUBSTANCE: proposed method includes first impregnation of filler in first bath filled with 5- 20-% solution of polymer binder preheated to temperature of 25-30 C at impregnation rate of 0.45-1.5 m/min when filler is acted on by supersonic waves. Then drying is carried out with the aid of infra-red radiation at filler flow rate of 0.45-1.5 m/min. Second impregnation of filler is carried out in second bath filled with 49- 65-% solution of the same polymer binder preheated to temperature of 25-30 C at impregnation rate of 0.45-1.5 m/min under action of ultrasonic waves. Then, filler is dried at rate 0.45-1.5 m/min flowing through horizontal drying chamber at temperature which is below gelatinization temperature of binder by at least 20 C. Then, partially dried filler is passed through system of drawing heated and cooled calendars.

EFFECT: improved quality of impregnation of prepreg.

7 cl, 2 tbl, 5 ex

FIELD: manufacture of articles for aeronautical engineering and rocketry for antenna domes, rockets and radioparent ports.

SUBSTANCE: multi-layer glass fabric is impregnated with phenol furfural formaldehyde binder, after which it is molded and binder is hardened. After hardening of binder, article is subjected to heat treatment at temperature of 220-240 C continued 2-4 hours, impregnated with phenol furfural formaldehyde binder in solution of alcohol and acetone at ratio of 6:1:1 for 0.8-1.0 hour per mm of article thickness and hardened at temperature of 150-170 C for 2-4 hours at temperature rise rate of 0.5-1.0 C/min.

EFFECT: reduced porosity of articles; increased strength of articles.

2 cl, 1 tbl, 3 ex

Composite material // 2247754

FIELD: composite materials.

SUBSTANCE: invention relates to composite materials that can be used as heat-protecting coatings in structures of various-type articles. Coating represents a composite material containing reinforcing filler and binder at their weight ratio 1:(0.4-0.5). The former is made from threads with linear density 52-58 tex based on poly-ε-caproamide fibers coated with continuous layer of tetrafluoroethylene/vinylidene fluoride copolymer filled with carbon black at weight ratio 1:(0.6-0.8). Epoxide binder is composed of, wt parts: 3,3'-dichloro-4.4'-diaminodiphenylmetane tetraglycidyl ether 100, 3,3'-dichloro-4.4'-diaminodiphenylmetane 30-60, 1,2-bis(hydroxymethyl)carborane or tris(dimethyldiaminomethyl)phenol 0.5-2.0.

EFFECT: raised effective enthalpy of coating so providing heat blocking effect and weakening thermal radiation effect owing to reflection and dissipation of emission of supplied convective heat stream when blowing gaseous destruction products into border layer.

6 dwg, 2 tbl, 6 ex

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