288results about How to "High breaking strength" patented technology

The invention discloses a preparation method of graphene-polyester nano-composite fiber. The preparation method comprises the step of preparing graphene-terylene polyester composite master batch and the step of preparing the graphene-polyester nano-composite fiber from the composite master batch. Compared with other conventional methods, the preparation method has the advantages that the technology is extremely simple, the reinforcing material is excellent in performance and low in cost; besides, excellent mechanical property and functional characteristics of graphene self endow the nano-composite fiber with functionalities like high strength and antistatic property, surface-modified and modified graphene has good dispersity and perfect interfacial compatibility in terylene polyester polymer matrix, which enables graphene to be effectively and uniformly compounded with a terylene polyester chip base material.

An element-doped diamond crystal is disclosed herein. The crystal includes at least one dopant element which has a greater concentration toward or near an outermost surface of the crystal than in the center of the crystal. The concentration of the dopant element is at a local minimum at least about 5 micrometers below the surface. The concentration-profile of the dopant element for these diamond crystals causes an expansion of the diamond lattice, thereby generating tangential compressive stresses at the surface of the diamond crystal. These stresses beneficially increase the compressive fracture strength of the diamond.

The invention provides a method for producing fine chinlon 6 fully drawn yarn with high strength which includes steps as follows: (1) chinlon 6 slice enters into a screw extruder with electrical heating function through a storage hopper that makes slice showing melt shape; (2) the melt material is pressed in a spinning subassembly through a metering pump quantificationally, and is spout by a spout plate for forming filament bundle in a spining box body; (3) the filament bundle is cooled by side wind through the spinning box body and is cooled further through a corridor; (4) the cooled filament bundle is oiled by an oil roll; (5) oil in the filament bundle is more uniform and has high amplexus degree through confounding; (6) the filament bundle passes through a first group filament guide roll and a second group filament guide roll for drafting forming, then passes through a third filament guide roll to reel. A grade product produced by the method has average more than or equal to 6.0cN/dtex rupture strength that is higher 22% than the product produced by normal method, and has better transparent sense and visual effect, the produced clothes has better flexible sense and handle sense for wearing cosily.

The invention relates to a preparation method of polyamide fiber with a uvioresistant function. The method comprises the following process steps: (1) grinding and mixing titanium dioxide, silicon dioxide and zinc oxide to obtain a mixture, and modifying the mixture by adopting a titanate coupling reagent so as to obtain a modified uvioresistant screening agent; (2) mixing the modified uvioresistant screening agent and polyamide slices, and performing melt extrusion pelleting in a twin-screw extruder so as to obtain uvioresistant master batches; (3) blending the uvioresistant master batches and the polyamide slices to obtain a mixture I, performing heating melting on the mixture I in the twin-screw extruder, and forming long polyamide yarns in an extruding manner from a yarn spraying port of a spinning manifold; (4) quenching and bundling the long polyamide yarns, so as to obtain yarn bundles, and performing primary tensioning, annealing and secondary tensioning on the yarn bundles so as to obtain the polyamide fiber. The polyamide fiber obtained by adopting the method has the good uvioresistant performance, and has the high wearing resisting performance.

The invention discloses a method for preparing spider silk protein/polylactic acid composite nano-fiber yarn. The method comprises the following steps of preparing a spinning solution, preparing a bath solution and then adopting an improved electrostatic spinning method to guide, heat, wind and shape bunched fibers, so as to obtain the spider silk protein/polylactic acid composite nano-fiber yarn. The composite nano-fiber yarn of the invention can be continuously spun for more than 10 hours and have no broken ends, and a certain amount of spider silk protein effectively reduces the diameter of the fibers and improves the strength of the yarn. In addition, the fracture strength and flexibility of the composite nano-fiber yarn can be further improved through secondary stretching and combined twisting, so that the composite nano-fiber yarn can be applied in biomedical materials and other fields better.

The invention relates to a manufacturing method for superlow shrinkage type PET industrial yarn, which is characterized in that the superlow shrinkage type PET industrial yarn is manufactured through selecting and controlling cooling conditions, and the technological process is as follows: hyperviscous melting to polyester raw materials, metering, spanning, cooling, oil supplying, stretching, hot shaping, and reeled forming. For lowing the irregularity and shrinkage percentage of fiber, a slow cooling device is arranged in the production of industrial yarn, a precooling device adopted is a hollow stepped ring-shaped belt comprising an upper part and a lower part, through holes with the diameters of 5 to 7 mm are uniformly distributed in the upper part of the ring-shaped belt, through holes with the diameters of 3 to 4 mm are uniformly distributed in the lower part, and the hole arrangement densities are the same. The natural target of the PET industrial yarn is as follows: the fracture strength is equal or greater than 7.0 cN/dtex, the breaking elongation is 20.0 plus or minus 1.5 percent, and the dry heat shrinkage percentage under the test conditions of 170 DEGC, 0.05cN/dtex reaches 1.9 plus or minus 0.25 percent.

The invention discloses a high-performance natural silk fiber and a preparation method thereof. High-performance silk fiber is formed by taking cocoon silk, raw silk, twisted silk or silk weaving yarn as raw materials and then performing contracting or stretching. The method specifically comprises the steps that inorganic salt, acid and water are mixed according to a certain ratio to prepare a silk swelling solution; the silk fiber is immersed into the swelling solution, and then stretching or contracting is performed; lastly, rinsing with clear water, neutralizing treating and drying are performed to obtain the high-performance natural silk fiber. The preparation method is simple, effective and short in process, the breaking strength of the silk fiber prepared through the method is comparable with that of spider silk, and therefore the high-performance natural silk fiber is suitable for application of the advanced technical fields of artificial ligaments, ophthalmological sutures, protective garments and the like.

Problems: To provide a polyvinylidene fluoride microporous membrane which has high water permeability and separation performance and is excellent in mechanical and chemical strength; and a process for producing the film.

Means for Solving Problems: An anisotropic polyvinylidene fluoride hollow fiber microporous membrane characterized in that the porosity of the cross-sectional bulk layer is higher than the membrane surface porosity of the outer layer and that in the cross section of the membrane, the dense microstructure of the outer surface changes substantially discontinuously into the coarse structure of the bulk layer. The microporous membrane can be produced by introducing by a dry-wet method a dope prepared by dissolving a polyvinylidene fluoride resin together with a water-soluble latent solvent at high temperature into a cooling bath consisting of water or a mixture thereof with a water-soluble latent solvent and subjecting the dope to membrane formation wherein the cross-sectional bulk layer is formed mainly by thermally-induced phase separation and the outer layer is formed mainly by nonsolvent-induced phase separation.

The invention discloses a manufacturing method for a fibrous membrane of an extremely hydrophobic organic macromolecule chemical compound with an oil-water separation function in the technical field of fibrous membrane manufacturing. The manufacturing method comprises the following steps: synthetizing a copolymer with excellent electrostatic spinnability by regulating the compounding ratio of a monomer and controlling the condition of a suspension polymerization technology and by adjusting and controlling the compositions of a solution, processing parameters and the temperature and humidity conditions of environment, and spinning a copolymer solution into the fibrous membrane with the advantages of uniform and small bore diameters, high porosity, large flux and extremely hydrophobic and oleophylic properties by using an electrostatic spinning technique. The obtained fibrous membrane has the advantages that the specific surface area is large, the patterns are large, the stacking structure is proper, and the fibrous membrane is in a three-dimensional bore channel structure. Compared with an existing polymer-based oil-water separation member, the fibrous membrane has the advantages that the bore channel structure is more reasonable, the separation capacity is stronger, the separation efficiency is higher, the anti-pollution capacity is stronger, the membrane bores are not easy to block, the oil-water selectivity is stronger, the mechanical strength is higher, the flexibility and the temperature resistance are better, the preparation process is shorter, the consumed energy is little, the filtering rate is higher, and the cost is lower, so that the fibrous membrane can better satisfy the requirements of industrial practicality.

An image display apparatus operates in field sequence mode which effectively reduces the generation of color break. A color break strength calculating unit determines a color break strength that indicates the noticeability of the generation of the color break. A light-source signal generating unit controls each light source so that as the color break strength of a color mixed component having the highest color break strength is higher, the color mixed component is contained more in light output from a light-source unit during the extension subframe period. If there is present a first pixel region as an area including one or more pixel formation regions where an image containing the component of interest is displayed, the color break strength of the component of interest increases more as a magnitude of the component of interest is larger in the first pixel region.

The invention advances a nonuniform hard alloy preparing method, when batching, preparing mixed material by the raw materials in weight percent: Co 11-12%, 9.01-13mum WC 44-48% and 1.0-1.2mum WC 41-44%, making wet milling on the mixed material in ball-material ratio of 4.8-5.3 to 1 and liquid-solid ratio of 450-510ml/g for 34-36h, drying and compress-molding, and then making vacuum sintering at vacuum 10-300Pa at sintering temperature 1400-1420deg.C, to prepare high-strength high-hardness nonuniform structural hard alloy alloy. The prepared hard alloy snow perching piece by this method has hardness at 88.0HRA, and bending strength at above 3000MPa, and service life prolonged by 20% above in comparison with snow perching pieces prepared by existing techniques.

A polyimide/polyacrylonitrile blended fiber and a preparation method belong to the technical field of blended fibers. The preparation method includes respectively preparing PAA (poly acrylic acid) liquor and PAN (polyacrylonitrile) liquor; blending the PAN liquor with the mass ranging from 3% to 40% of that of total PAA/PAN blended components and the PAA liquor to obtain spinning liquid precursor; removing bubbles in a vacuum manner, realizing wet-method spinning to obtain a PAA/PAN as-formed blended fiber; and realizing heat treatment for the as-formed blended fiber, removing moisture and solvent, completing a pre-oxidation process for the PAN component in the blended fiber and an imide cyclization process for the poly acrylic acid in the blended fiber, and obtaining the PI (polyimide)/PAN fiber. By means of comparing performances of a single component and the blended fiber under identical treatment conditions, a blended system capable of keeping an excellent mechanical performance of the fiber is obtained, and an excellent economic benefit is realized as compared with a PI fiber.

The invention discloses an engine mounting heat-resisting material and a preparation method thereof. The engine mounting heat-resisting material comprises the following raw materials in parts by weight: 70 to 80 parts of standard natural rubbers, 10 to 20 parts of butadiene rubbers, 5 to 10 parts of zinc oxide, 1 to 3 parts of stearic acid, 1 to 3 parts of 2,2,4-trimethyl-1,2-dihydro-chinoline polymers, 1 to 2 parts of N-isopropyl-N-phenylene diamine, 1 to 3 parts of composite paraffin, 25 to 40 parts of carbon black, 3 to 6 parts of complex calcium salt, 5 to 8 parts of white carbon black, 1to 3 parts of silane coupling agent, 1 to 2 parts of sulphur, 1 to 3 parts of zinc diethyl dithiocarbamate, and 1 to 3 parts of N-Cyclohexyl-2-benzothiazole. In the invention, an engine mounting material with good heat-resisting performance is prepared through a special refining process, has long service life and saves the using cost.

The invention discloses a high-wear-resistance water-based plastic coating and a preparation method thereof. The invention belongs to the technical field of water-based paint. The invention solves thetechnical problems of insufficient adhesion and poor wear resistance of the existing water-based paint on the plastic base material. The product disclosed by the invention is formed by mixing a component A and a component B which are independently packaged when in use, wherein the component A is prepared from water-based resin A, water-based resin B, graphene and carbon nanotube composite slurry,pigments, fillers and other assistants and 5-10 parts of deionized water; and the component B is prepared from auxiliaries such as a curing agent and deionized water. According to the invention, thewater-based resin B is micromolecular resin; the water-based resin B has excellent permeability, partially permeates into a base material to form a film and increase the adhesive force, the water-based resin A is macromolecular resin and has good sealing film-forming property, and the resins with different molecular weights are compounded for use, so that the sealing property, the water resistance, the weather resistance, the mechanical property and the like of a coating film can be improved, and the coating film has excellent adhesive force.

A process for preparing the expendable composite nitrile rubber-polyurethane glove includes generating a layer of nitrile rubber film on a mould, and dipping it in aquatic polyurethane emulsion. The resultant glove has high resistance to oil and bacterial osmosis, high weatherability, and high air and moisture permeability.

The present invention relates to a polyethylene terephthalate/attapulgite nano-composite fiber, which comprises polyethylene terephthalate and uniformly distributed attapulgite, wherein the attapulgite is distributed in nanometer size in the fiber. The composite fiber of the present invention not only has the excellent property of polyethylene terephthalate (PET) fiber, but also can improve mechanical properties including fracture strength, etc. of PET nano-composite fiber and significantly decrease the time for crystallization of PET fiber.

The present invention discloses a composite soft magnetic powder core and a preparation method therefor, which belong to the technical fields of soft magnetic materials and preparation thereof. An Fe/Fe₃O₄ shell layer is generated in situ on surfaces of iron powder particles through a controlled oxidation process, to prepare Fe/Fe₃O₄ composite soft magnetic powder having a uniform structure. The Fe/Fe₃O₄ composite soft magnetic powder is mixed with suitable amount of silicone resin, and prepared into a high-performance Fe/Fe₃O₄ composite soft magnetic powder core by using a powder metallurgy compaction process. Such magnetic powder core has a high density, a high magnetic conductivity, a high magnetic flux density, a low loss, and a high breaking strength, and is useful in a large-power and low-loss application scenario. The present invention has the advantages of being rich in raw material resources, simple in process and environmentally friendly, and being suitable for industrial production.

A graphite-enhanced ultrafine synthetic leather fiber is provided. Graphite nylon 6 master batch is prepared via a twin-screw extrusion way; the nylon 6 master material is added to nylon 6 granules via a metering device for sea-island melt spinning; and graphite-enhanced ultrafine fibers can be achieved after decrement and splitting. The graphite-enhanced ultrafine synthetic leather fiber is characterized by high breaking tenacity, static resistance, bacteria resistance, aging resistant and strong flexibility; ultrafine fiber synthetic leather quality and comprehensive performance can be improved when the graphite-enhanced ultrafine synthetic leather fiber is applied to synthetic leather industry; and traditional sea-island fiber spinning equipment can be employed for production.

Disclosed are a rubber composition for a conveyor belt and a conveyor belt which can maintain basic physical properties such as high rupture strength and high wear resistance and can reduce the power consumption to a satisfactory level. The rubber composition comprises a rubber component comprising natural rubber (NR) and polybutadiene rubber (BR), carbon black, silica, a silane coupling agent and diethylene glycol, wherein the ratio between the amount of natural rubber and the amount of polybutadiene rubber (NR/BR) in the rubber component is 80/20 to 25/75, the content of carbon black is 15 to 35 parts by mass based on 100 parts by mass of the rubber component, the content of silica is 5 to 25 parts by mass based on 100 parts by mass or the rubber component, the content of the silane coupling agent is 0.5 to 3 parts by mass based on 100 parts by mass of the rubber component, and the content of diethylene glycol is 0.5 to 4.5 parts by mass based on 100 parts by mass of the rubber component.

The invention discloses cord thread spinning oil. The cord thread spinning oil comprises, by mass, 40-60% of plant oil, 30-50% of compound fatty acid ester, 1-10% of non-ion surfactant, and the balance antioxidant. The plant oil is selected from at least one of peanut oil, soya-bean oil, linseed oil, castor oil, health oil, and rapeseed oil, refined processing is carried out on the plant oil, iodine value is higher than 70, the compound fatty acid ester is pentaerythritol ester or trimethylolpropane ester, and the non-ion surfactant is fatty alcohol-polyoxyethylene ether, fatty alcohol polyurethane propylene ether or fatty alcohol polyoxyethylene polyoxypropylene.

The invention belongs to the technical field of high-molecular materials, and relates to a tough epoxy resin curing system and a preparation method thereof. The high-molecular material is prepared from the following compositions in parts by weight: 100 parts of epoxy resin, 8-120 parts of a curing agent, 0-1.5 parts of a promoter and 5-55 parts of thermoplastic. High-toughness high-heat-resistance thermoplastic engineering plastic toughened epoxy resin is selected in the epoxy resin cure system, and curing and toughening of epoxy resin can be realized under the premise of not reducing or slightly reducing mechanical properties and thermal properties.

The object of the present invention is to provide a rubber composition having high breaking strength, excellent in bead durability without the generation of rubber cracking during mounting and demounting of the rim, and excellent in fuel efficiency.

The present invention relates a rubber composition for a chafer comprising:

• • (A) a diene rubber comprising
  • (A1) 10 to 60% by mass of a butadiene rubber containing 2.5 to 20% by mass of a 1,2-syndiotactic polybutadiene crystal,
  • (A2) 5 to 50% by mass of a tin-modified butadiene rubber polymerized with a lithium initiator and having 50 to 3000 ppm content of tin atoms, 5 to 50% by mass of vinyl bond amount and a molecular weight distribution of at most 2.0, and
  • (A3) 20 to 75% by mass of a diene rubber other than the butadiene rubber (A1) and the tin-modified butadiene rubber (A2); and
  • (B) 5 to 30 parts by mass of silica (B) based on 100 parts by mass of the diene rubber components,
  • wherein elongation at break of the rubber composition for a chafer is at least 280%.

The invention discloses a preparation method of graphene and polyester fibers, belonging to the field of textile fibers. The method comprises a feeding process, an esterification process, a polycondensation process and a melt spinning process, wherein the feeding process comprises the steps of adding p-phthalic acid and ethylene glycol into a reaction kettle according to a weight ratio of 1 to (1-2), and adding a catalyst and graphene at the same time. The preparation method provided by the invention has the beneficial effects that the mixing of graphene and polyester is shifted ahead to a preparation process of polyester chips; the graphene is added when the p-phthalic acid is mixed with the ethylene glycol, so that not only is the polyester fully mixed with the graphene in a molecular unit state, but the mixing effect of the polyester and the graphene is also improved; therefore, the character consistency and breaking strength of the graphene and polyester fibers are improved. Furthermore, when the preparation of the polyester chips is finished, the mixing of the polyester and the graphene is realized, so that the production process is shortened, and the production cost is lowered.

The invention discloses a substrate with high fracture strength. The substrate according to the invention includes a plurality of nanostructures. The substrate has a first surface, and the nanostructures are protruded from the first surface. By the formation of the nanostructures, the fracture strength of the substrate is enhanced.

The invention relates to a method for preparing CNT (carbon nano tube)-polyacrylonitrile fibre by melting spinning. The method comprises the following steps of: (1) dispersing CNT in ion liquid, adding polyacrylonitrile and mixing uniformly to obtain a mixed solution, wherein the mass ratio of CNT to polyacrylonitrile is 4:1-1:10, the ratio of the total mass of CNT and polyacrylonitrile to the mass of the ion liquid is 1:1-1:100; (2) processing the mixed solution by using a melting spinning method to obtain CNT-polyacrylonitrile as-spun fibre, stretching and extracting the as-spun fibre, and then performing heat setting and winding to finally obtain CNT-polyacrylonitrile composite fibre. The method provided by the invention has the advantages of low cost, reduction in environmental pollution and is suitable for industrial production; and the prepared fibre can be subjected to high stretching and has excellent mechanical property, moreover the skin-core structure difference of sections of fibre is small.

The invention discloses a disposable graphene-nitrile rubber glove with antibacterial and antistatic functions in the technical field of latex gloves and a preparation method thereof; it includes the following raw materials in parts by weight: 100 parts of nitrile latex, 1.0 to 1.0 parts of alkali 1.5 parts, graphene 0.05-0.5 parts, surfactant 0.001-0.005 parts, defoamer 0.10-0.30 parts, auxiliary components 4.1-6 parts, water 200-250 parts. Compared with the prior art, the invention improves the breaking strength and elongation at break of the gloves obtained by optimizing the raw materials and preparation methods of the disposable gloves, and the service life and antibacterial effect of the gloves are also improved.

The invention discloses a one-step preparation method and a one-step preparation device of full drawn yarn (FDY) or FDY differential shrinkage combined filament yarn. The preparation method includes the steps of combining yarn spun by a first spinning assembly and a second spinning assembly after the yarn spun by the first spinning assembly and the second spinning assembly are respectively drafted and finalize the design, obtaining the combined filament yarn through a wire stitching machine and a winding roller, or combining the yarn spun by the first spinning assembly and the second spinning assembly and finalizing the design in a second hot roller after the yarn spun by the first spinning assembly and the second spinning assembly is drafted and obtaining the combined filament yarn through the wire stitching machine and the winding roller. Combined filament yarn raw materials obtained through the preparation method is flexible and diverse in combination, strong in intensity, and capable of improving and increasing varieties and improving product value.

The invention relates to a method for processing a small-specification blending modified polypropylene light-emitting rope for fishing, belonging to the method for processing the light-emitting rope for fishing and needing providing a method for processing the small-specification blending modified polypropylene light-emitting rope for fishing. The small-specification blending modified polypropylene light-emitting rope for fishing is processed by adopting the raw materials of PP resin, HDPE resin, light-emitting powder and assistant. The method is characterized in that a mixture of the PP resin, the light-emitting powder, zinc stearate and white oil is extruded and pelleted to obtain a blending material matrix; a mixture of the blending material matrix, the PP resin and the HDPE resin is melted and extruded by an extruding machine, a raw silk obtained through melting and extruding is cooled and pre-drafted, and a pre-drafted silk is subjected to two times of thermal drafting and then cooled with airflow; the single silk bundle is split into a blending modified polypropylene light-emitting silk for fishing, 36 light-emitting silks are twisted to a Z-direction light-emitting rope yarn, 6 Z-direction light-emitting rope yarns are manufactured into an S-direction rope yarn, and 3 S-direction light-emitting rope yarns are twisted into a small-specification blending modified polypropylene light-emitting rope for fishing in a Z direction. The invention is used for the light-emitting rope for fishing.

The invention discloses an oil-resistant anti-aging rubber cable material which is prepared from the raw materials including, by weight, 3-4 parts of vinyl phenyl silicone oil, 5-7 parts of chlorosulfonated polyethylene powder, 4-5 parts of sulfur, 2-3 parts of palm wax, 7-9 parts of steel wool fiber, 16-20 parts of fluoro-rubber, 12-14 parts of barite powder, 7-9 parts of carbon black, 2-3 parts of ascorbyl palmitate, 2-3 parts of emulsified methyl silicone oil, 0.5-1 part of triphenyl phosphate, 45-56 parts of styrene-butadiene rubber, 55-60 parts of chloroprene rubber, 55-70 parts of natural rubber, 30-40 parts of hollow glass micro beads, 3-5 parts of polytetrafluoroethylene, 1-1.3 parts of a silane coupling agent kh550, 12-16 parts of epoxy resin E44, 0.06-0.1 parts of diethylene triamine, 0.1-0.2 parts of an accelerator M, 2.6-3 parts of a silane coupling agent kh570, and a proper amount of distilled water. The cable material is excellent in mechanical performance, is not liable to cause circuit fault and is valuable to promote.

The invention discloses a synthetic quartzite plate and a preparation method thereof. The synthetic quartzite plate is prepared from the following components in percentage by mass: 15%-25% of 8-16-mesh quartz sand, 8%-15% of 16-26-mesh quartz sand, 8%-15% of 26-40-mesh quartz sand, 10%-20% of 40-100-mesh quartz sand, 25-40% of 325-mesh quartz powder, 2%-5% of cullet, 5-8% of unsaturated polyester resin, 2%-8% of fibers, 2%-5% of pigments, 0.1%-5% of a coupling reagent and 0.1%-5% of a curing agent. With quartzite, quartzite sand, waste glass and unsaturated polyester resin with various particle sizes as raw materials, the method is environment-friendly and economical; and due to addition of the fibers, the synthetic quartzite plate has relatively high breaking strength, compressive strength and bending strength; and the preparation method is low in preparation cost, simple to operate and suitable for industrial production.