78 results about "Polybenzimidazole fiber" patented technology

The invention discloses a composite fiber membrane. The composite fiber membrane is formed by one or two above of polybenzimidazole polymerized by one of a PBI unit and one or two above of a supporting polymer; polybenzimidazole fibers and supporting polymer fibers are microscopically of interpenetration interweaving network structures, and nodes are arranged between interwoven fibers; the molecular weight of the polybenzimidazole is 6 ten thousand to 20 ten thousand; the molecular weight of the supporting polymer is 2 ten thousand to 100 ten thousand; the quality content of the supporting polymer in a composite fiber proton exchange membrane is 5 wt.% to 80 wt.%. The proton conduction capacity is provided for PBI by doping phosphoric acid, and when the thickness of an electrolyte membrane is low, and the proton conductivity is high, the proton conduction efficiency is highest. Descending of the mechanical strength of the membrane can be caused when the proton conduction efficiency is improved by adding the doping content of the phosphoric acid and reducing the thickness of the membrane. For solving contradictions between the mechanical strength and the thickness of the membrane, an effective way that the supporting polymer fibers with the good mechanical strength are led into the membrane is achieved.

The invention relates to a preparation method of a heat-preservation and heat-insulation tent composite fabric, and belongs to the technical field of textile fabrics. Polyimide modified silicon dioxide aerogel is used as a coating, a fabric prepared from polyurethane modified polybenzimidazole fibers is used as base cloth, the coating is coated between the two layers of base cloth, and the heat-preservation and heat-insulation tent composite fabric is prepared through hot pressing and has good weather resistance, flame retardance, water resistance, ultraviolet resistance and other functions. The polybenzimidazole fiber has outstanding high temperature resistance and good waterproof performance; the silicon dioxide aerogel has the obvious characteristics of a nanometer material; good optical performance, sound absorption performance, chemical stability, environmental protection performance and excellent heat preservation and heat insulation performance are realized; polyimide has good mechanical property and flexibility and low thermal conductivity, and the prepared film has good flexibility and can be bent and folded, so that the polyimide modified silicon dioxide aerogel has goodmechanical property and thermal insulation property.

The invention discloses a nano vermiculite modified composite sound absorbing material. The material is prepared from the following raw materials in parts by weight: 100-120 parts of barite powder, 50-60 parts of ceramsite, 40-50 parts of nano vermiculite, 80-90 parts of polyvinyl acetate emulsion, 55-65 parts of modified tree ashes, 15-20 parts of aluminium hydroxide, 20-30 parts of polybenzimidazole fibers, 10-20 parts of nanocarbon, 20-30 parts of EVA (ethylene-vinyl acetate copolymer), 15-20 parts of CPE (chlorinated polyethylene), 5-10 parts of HIPS (high impact polystyrene), 5-8 parts of diisobutyl phthalate, 4-6 parts of decabromodiphenyl ether, 2-3 parts of zinc stearate and 1-2 parts of tribasic lead sulfate. The material has the beneficial effects that the problem of developing and researching the sound absorbing material urgently is solved and the novel sound absorbing material which meets the requirements, can stand the tests of harsh environments and has the advantages of high tensile strength, high elongation, high breaking strength, good sound absorbing effect and the like is prepared.

The invention discloses a brake pad friction material composition and a preparation method thereof, and a brake pad. The brake pad friction material composition comprises a binding agent, a reinforcing material and a friction performance modifier. The binding agent comprises modified phenolic resin and silicone resin. The reinforcing material comprises aluminum silicate fiber, steel fiber, carbonfiber, aramid fiber, polybenzimidazole fiber, polyphenylene sulfide fiber and polytetrafluoroethylene fiber. The friction performance modifier comprises mullite whisker, silicon nitride, yttrium silicate, silicon carbide, boron nitride, silicon dioxide aerosol, titanium nitride and titanium carbide. The friction coefficient of the brake pad manufactured by the adoption of the brake pad friction material composition is high and stable in the braking process, the wear rate is small, and the brake pad has excellent heat stability, is low in noise and shakes little.

The invention discloses PET (polyethylene terephthalate) fiber/polybenzimidazole fiber composite sound absorption cotton, which comprises the following raw materials in parts by weight: 70-80 parts of PET fiber, 40-50 parts of polybenzimidazole fiber, 10-15 parts of emulsifiers OP-40, 5-10 parts of peregal O-25, 80-100 parts of PP (propene polymer), 30-40 parts of ABS (acrylonitrile butadiene styrene), 15-20 parts of titanium dioxide, 10-15 parts of modified diatomite, 2-3 parts of stearic acid, 5-8 parts of di-iso-octyl sebacate, 4-6 parts of antimonous oxide, 2-3 parts of glyceryl monostearate, 1-2 parts of phenyl triethoxysilane, 2-3 parts of zinc stearate, 1-2 parts of dibasic lead phosphite, 0.5-1.5 parts of anti-aging agents MB, and 1-2 parts of antioxidant 168. The sound absorption cotton prepared by the method has the advantages of excellent appearance evenness, even thickness, soft hand feel, excellent product bonding degree, strong tensile property, excellent sound absorption performance, excellent flame retardant efficiency and the like.

The invention discloses an efficient automobile filter paper and a preparation method thereof. The efficient automobile filter paper is composed of the following raw materials, by weight: 70-80 parts of softwood pulp, 20-30 parts of polybenzimidazole fiber, 10-20 parts of quartz glass fiber, 2-5 parts of modified bentonite, 1-3 parts of nanometer calcium, 2-4 parts of diatomaceous earth, 1-2 parts of nanometer titania, 0.5-0.8 part of decabromodiphenyl ether, 2-3 parts of modified polyvinyl acetate emulsion, 0.5-1 part of glycerol triglyceride, 0.5-1 part of a silane coupling agent KH550, 0.4-0.8 part of sodium lauryl sulfate, and 2-5 parts of polyethylene imine. The filter paper prepared by the invention has advantages of good water permeability, large filtering area, small maximum pore size, high filtration precision, strong durability, high temperature resistance, high tensile strength and good water resistance, has filtering efficiency reaching 99.99%, stable performance index at room temperature and high temperature, and good temperature resistance and filtering effect.

This invention concerns a flame-resistant garment having an outer shell fabric comprising 5 to 50 parts by weight of a polypyridobisimidazole fiber having an inherent viscosity of greater than 20 dl/g and 50 to 95 parts by weight of polybenzimidazole fiber.

The invention discloses a modified polybenzimidazole fiber reinforcement cement paste system. The system comprises the following components in parts by weight: 100 parts of high sulfate resistance grade-G oil well cement, 0.2 to 3.0 parts of modified polybenzimidazole fiber, 0 to 40 pars of quartz sand, 0.5 to 2.5 parts of a dispersant, 1.0 to 6.0 parts of a fluid loss agent, 0.2 to 3.0 parts of aretarder, and 38 to 70 parts of water. The modified polybenzimidazole fiber is performed by performing surface modification on the polybenzimidazole fiber as follows: firstly, performing oxidation treatment on the polybenzimidazole fiber, then, performing low temperature plasma treatment on the polybenzimidazole fiber, and finally, performing coupling treatment on the polybenzimidazole fiber. Feinforcement cement paste has the characteristics of high tensile strength, breaking strength and low elasticity modulus, the modified polybenzimidazole fiber is high in temperature resistance capacityand good in dispersibility in cement paste, set cement is excellent in mechanical property, and the system has important application value for improving the cementing quality of high temperature deepwells and shale gas wells.

The invention discloses a basalt fiber chenille circular weaving machine weaving filter bag. The filter bag is a basalt fiber chenille weaving filter bag woven by a circular weaving machine. A basalt fiber chenille yarn comprises two parts of a core yarn and camlet. The material of the camlet is basalt fibers or a combined yarn of the basalt fibers with one or more selected from quartz glass fibers, high silica glass fibers, alumina silicate fibers, polyamide-imide fibers, PEEK fibers, polyphenylene sulfide fibers, polysulfone amide fibers, polyparaphenylene benzo dual-oxazole fibers, polybenzimidazole fibers, Teflon fibers, polymide fibers, and aramid fibers. The core yarn is two strands of yarns. After twisting the core yarns, the camlet is clamped between the two core yarns. A round filter bag woven by a six-shuttle circular weaving machine does not have weft weak points, the angle between a longitude fiber and a latitude fiber is 90 DEG. When filtering wind pressure is relatively large, a problem of breaking of weak points on the weft direction is not prone to occur.

The invention discloses a preparation method of a heat-resistant PVC (polyvinyl chloride) pipe. The preparation method includes the operation steps: (1) mixing PVC resin and tetrabutylammonium fluoride, heating mixture to reach the temperature of 68-72 DEG C, uniformly mixing and stirring the mixture after completely melting of the tetrabutylammonium fluoride, and cooling the mixture to reach indoor temperature to prepare modified PVC resin; (2) mixing, stirring and heating polybenzimidazole fibers, polytetrafluoroethylene resin and acetaldehyde ammonia trimers, adding aluminum borate and zirconium oxide when the temperature reaches 80 DEG C, continuing to keep temperature and mix mixture for 15-20 minutes, and cooling the mixture to reach the indoor temperature to prepare heat-resistant agents; (3) adding the modified PVC resin, calcium-zinc stabilizers, the heat-resistant agents and calcium carbonate into a extruding machine, and performing extrusion molding, cooling and sizing to obtain the heat-resistant PVC pipe. The preparation method is stable in production process, continuous mass production can be achieved, the prepared PVC pipe is excellent in mechanical property and particularly has excellent heat resistance, and the quality of the PVC pipe is greatly improved.

The invention discloses an antiflaming blended fabric. The antiflaming blended fabric is obtained through padding of a gray fabric in antiflaming treating liquid; the gray fabric is obtained through blending weaving of following raw materials, wherein the raw materials comprise, by weight, 36-40 parts of chinlon fibers, 12-16 parts of polytetrafluoroethylene fibers, 6-8 parts of polybenzimidazole fibers and 3-7 parts of coconut fibers. The antiflaming blended fabric is obtained through padding of the gray fabric in the antiflaming treating liquid and has good antiflaming performance; the antiflaming treating liquid takes 2,4-diamido-6-(3,3,3-tribromo propyl)-1,3,5-triazine and decabromodiphenyl ether which cooperate with each other as an antiflaming agent, the antiflaming performance of the antiflaming treatment liquid is improved, sulfated castor oil improves the permeability, and the performance of attachment of the antiflaming treating liquid to the gray fabric is improved; by adding bisphenol A unsaturated polyester, the attachment force of the antiflaming agent is further improved.

The present invention discloses an Eva emulsion heat radiating coating. The Eva emulsion heat radiating coating is prepared from the following raw materials in parts by weight: 2-4 parts of calcium fluoride, 6-10 parts of an Eva emulsion, 12-15 parts of a styrene and maleic anhydride copolymer, 6-10 parts of propargyl alcohol, 90-100 parts of tetrahydrofuran, 4-7 parts of graphene, 16-20 parts of nano silicon dioxide, 700-800 parts of dimethylformamide, 4-5 parts of sodium nitride, 0.04-0.05 part of aluminium trichloride, 1.6-2 parts of a 2-3% sodium ascorbate solution, 1.8-2 parts of a 2-3% copper sulfate solution, 120-130 parts of high density polyethylene, 0.7-1 part of ricinoleic acid, 3-4 parts of dimethyl Methylphosphorate, 2-3 parts of diphenyl silandiol, 0.7-1 part of ammonium molybdate, 1-2 parts of polybenzimidazole fiber and 0.4-0.5 part of a silane coupling agent KH560. According to the present invention, by adding the Eva emulsion, the compatibility of materials among resin can be improved, the dispersibility of particles is improved, and the heat-conducting and heat radiating effect is improved.

The invention discloses an inorganic or organic nano composite material for a protective suit and a preparation method thereof and relates to the technical field of biomedical high molecular materials. The inorganic or organic nano composite material is composed of the following five layers of structures from top to bottom: a waterproof layer, a nano composite material, a fiber layer, a hot melt adhesive thin film and a contact layer. According to the inorganic or organic nano composite material disclosed by the invention, the waterproof layer, the nano composite material, the fiber layer, thehot melt adhesive thin film and the contact layer are compounded and molded in sequence, so that the prepared composite material has advantages of a traditional material and also has the advantages of high elasticity and high breaking strength; meanwhile, the fiber layer comprises polybenzimidazole fibers, polyphenylene sulfide fibers, glass fibers and silicon fibers and has the advantage of highflame-retarding strength; meanwhile, the nano composite material comprises nano-grade activated carbon and an antibacterial agent and has the effects of sterilizing and disinfecting, and absorbing harmful substances.

The invention discloses an elastic anti-buffer rubber material, which is composed of the following raw materials in parts by weight: magnesium oxide 0.1-0.3, zinc oxide 1-2, accelerator TMTD 0.8-1, sulfur 1-2, anti-aging Agent AW1-2, tributyl citrate 7-9, buffer additive 5-7, medical stone powder 2-4, ethylene glycol monobutyl ether 4-6, propylene glycol alginate 1-2, polybenzimidazole Fiber 3-4, oxidized polyethylene wax 2-4, 8-hydroxyquinoline copper 0.7-1, silane coupling agent KH5600.1-0.2, butadiene rubber 100-140, wollastonite powder 10-12, dodecane Base trimethyl ammonium chloride 0.7-1; The present invention adopts polyurethane thermoplastic elastomer as the main body of the anti-buffer material, which not only has good impact strength, but also can improve various mechanical properties of finished rubber and improve weather resistance. The anti-buffer rubber material invented has good flexibility and high resilience, and can be used as a variety of safety protection buffer materials. It has no volatilization of toxic and harmful components, and is safe and reliable.

The invention provides high-temperature-resistant composite paper and a preparation method thereof and relates to the technical field of paper product processing. The composite paper comprises four layers from bottom to top, wherein the first layer is a parchment layer, the second layer is an alumina layer, the third layer is a polycarbonate layer, and the fourth layer is a fiber layer formed by mixing polybenzimidazole fiber with polyether sulphone fiber. The prepared high-temperature-resistant composite paper with the four-layer composite structure has good high temperature resistance and mechanical performance, is not prone to damage, has small mass loss rate (less than 1.17%) at the high temperature of 200 DEG C and can still keep higher tensile strength retention rate up to 70% afterworking at 100 DEG C for 6,500 h. The prepared composite paper has good promotion and application value, production of paper for non-traditional machining is further promoted, and import dependence isreduced.

The invention discloses a preparation method of a high-temperature-resistant filtering material and belongs to the technical field of filtering and dedusting materials. The method comprises the stepsof 1) mixing, 2) opening, 3) lapping, 4) needling, 5) dipping and 6) film covering. The mixing process comprises: uniformly mixing basalt fibers and polybenzimidazole fibers according to a weight ratio of (3-4): (1-2), and the dipping process comprises: padding the needled felt in the treatment liquid, wherein the pick-up rate is 29-33%, drying at the temperature of 190-220 DEG C, baking at the temperature of 250-320 DEG C, controlling the drying and baking speed to be 4-5m/min, and rolling, wherein the treatment liquid is prepared from the following components in percentage by mass: 15 to 26percent of polytetrafluoroethylene dispersion liquid, 2 to 6 percent of dimethyl diphenyl polysiloxane, 0.7 to 3 percent of 3-aminopropyltriethoxysilane, 0.5 to 1 percent of Tween and the balance of water. The filtering material has good high temperature resistance, can resist the temperature of 280-295 DEG C for a long time, can resist the temperature of 320 DEG C instantaneously, and has the service life of 2 years or longer.

The invention discloses a high-temperature resistant fiber blended fabric. The high-temperature resistant fiber blended fabric is formed by blending polybenzimidazole fibers, poly-p-phenylene terephthamide fibers, boron nitride fibers and polyamide-imide fibers in a woven mode, and comprises, by weight, 13% to 17% of the polybenzimidazole fibers, 25% to 29% of the poly-p-phenylene terephthamide fibers, 10% to 14% of the boron nitride fibers and 40% to 52% of the polyamide-imide fibers. The high-temperature resistant fiber blended fabric is formed by blending the four fabric fibers including the polybenzimidazole fibers, the poly-p-phenylene terephthamide fibers, the boron nitride fibers and the polyamide-imide fibers in the woven mode, and the fabric formed in the woven mode has the excellent high-temperature resistance, the excellent chemical corrosion resistance, the excellent tensile strength and the excellent abrasion resistance, and is high in wearing safety performance and low in production cost.

The invention discloses a basalt fiber chenille woven fabric woven by basalt fiber chenille yarns through weaving equipment. The basalt fiber chenille yarns comprise core wires and camlets. The camlets are made of basalt fiber or combination yarns made of the basalt fiber and one or more of silica glass fiber, high silica glass fiber, aluminum silicate fiber, polyamide-imide fiber, polyether-ether-ketone fiber, polyphenylene sulfide fiber, polysulfone base amide fiber, polyp-phenylene benzobisthiazole fiber, polybenzimidazole fiber, polytetrafluroethylene fiber, polyimide fiber and aramid fiber. The core wires are two piled yarns. After the core wires are twisted, the camlets are placed between the core wires. The processing method for the basalt fiber chenille woven fabric by the weaving equipment is the most traditional method and includes an included angle 90 degrees between latitudinal and longitudinal directions. Various equipment is suitable to produce the basalt fiber chenille woven fabric with huge quantity and lowest production cost.