2056results 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.

A novel compound and novel gelatinous substance which have high absorbability, uniform expansion, and elasticity. Although conventional gels include chemical gels and physical gels, no novel gels or compounds have been realized which have fracture resistance, high entropic elasticity, and biodegradability. The present invention provides a novel compound and a novel gelatinous substance which each comprises a crosslinked polyrotaxane obtained by chemically bonding two or more polyrotaxane molecules through the cyclic molecules or rotators thereof.

The invention provides a high-scratch-resistance abrasion-resistant coating material and a preparation method thereof. The preparation method comprises the following steps: modifying the graphene surface by using active groups by a chemical modification technique to obtain modified graphene, and blending the modified graphene with polysiloxane to obtain the high-scratch-resistance abrasion-resistant nano composite coating material. The surface modification is carried out to enhance the dispersity of the graphene and the interactions between the graphene and polysiloxane matrix, thereby enhancing the mechanical properties of the coating. No pigment or filler is added. The scratch resistance of the transparent graphene/polysiloxane composite coating is enhanced by 140% or above, and the abrasion loss is reduced by 60% or above. The transparent graphene/polysiloxane composite coating has excellent adhesion, heat resistance, weather resistance, flame retardancy and corrosion resistance. The graphene/polysiloxane composite coating can be used for surface protection and shielding of various metals, plastics, wood, concrete, glass and other substrates, and is applicable to the fields of automobile paints, photoelectric materials, precision instruments, marine heavy-corrosion protection, buildings and the like.

Fine-grained (average grain size 1 nm to 1,000 nm) metallic coatings optionally containing solid particulates dispersed therein are disclosed. The fine-grained metallic materials are significantly harder and stronger than conventional coatings of the same chemical composition due to Hall-Petch strengthening and have low linear coefficients of thermal expansion (CTEs). The invention provides means for matching the CTE of the fine-grained metallic coating to the one of the substrate by adjusting the composition of the alloy and/or by varying the chemistry and volume fraction of particulates embedded in the coating. The fine-grained metallic coatings are particularly suited for strong and lightweight articles, precision molds, sporting goods, automotive parts and components exposed to thermal cycling. The low CTEs and the ability to match the CTEs of the fine-grained metallic coatings with the CTEs of the substrate minimize dimensional changes during thermal cycling and prevent premature failure.

A device having an integrated circuit, especially an IC card, for reliably verifying a person's identity by display of PIN numbers or passwords with ingenuity. Portable electronic devices such as a PDA or a cellular phone, or other products can have plural displays in a display area (display part) provided in a limited area. A first display area and a second display area having transparency are stacked together in a thin film integrated circuit device of the present invention. The area of display can be reduced and display of more complicated PIN numbers or passwords is enabled by layering the display of the first display area and the display of the second display area.

A device for heat treating (annealing) a III-V semiconductor wafer comprises at least one wafer support unit which is dimensioned such that a cover provided above the wafer surface is either spaced without any distance or with a distance of maximally about 2 mm to the wafer surface. A process for heat treating III-V semiconductor wafers having diameters larger than 100 mm and a dislocation density below 1×10⁴ cm⁻² is carried out in the device of the invention. SI GaAs wafers produced have an at least 25% increased characteristic fracture strength (Weibull distribution), an improved radial macroscopic and mesoscopic homogeneity and an improved quality of the mechano-chemically polished surface. The characteristic fracture strength is higher than 1900 MPa.

The invention relates to a tamper-resistant pharmaceutical dosage form comprising one or more particles, wherein each of said one or more particles

• • comprises a pharmacologically active ingredient and a physiologically acceptable polymer;
  • has a breaking strength of at least 300 N;
  • has a weight of at least 2 mg; and
  • optionally, comprises a film-coating;

wherein the total weight of the pharmaceutical dosage form is greater than the total weight of said one or more particles.

The invention relates to a preparation method for a carbon/carbon-copper composite material, which belongs to the technical field of special carbon fiber composite materials. The preparation method mainly comprises the following preparation processes: preparation of carbon fiber green bodies; preparation of carbon/carbon preforms; and preparation of the carbon/carbon-copper composite material. The preparation processes comprise the following steps: firstly, cross-linking fibers in a pre-oxidized fiber felt of polyacrylonitrile by using needle-punching; secondly, performing carbonization on the needle-punched pre-oxidized fiber felt to form a carbon fiber needle-punched felt; thirdly, depositing pyrolytic carbon on the surfaces of the carbon fibers by using a chemical vapor infiltration (CVI) process, or densifying the carbon fibers by using a process combining the CVI process and resin impregnation, wherein the carbon fibers are adhered together through the pyrolytic carbon or the pyrolytic carbon and resin carbon to form a porous carbon/carbon composite material preform; and fourthly, performing high-temperature treatment on the porous carbon/carbon composite material preform, and impregnating the solution of copper into the carbon/carbon composite material preform by using a gas pressure infiltration method to obtain the carbon/carbon-copper composite material finally.

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 discloses a method for preparing polyurethane elastomer modified by a carbon nano-tube. After acidification and acylchlorination at the surface, the carbon nano-tube reacts with polyhydroxy compound or oligomer to produce a carbon nano-tube with functionalized hydroxyls; one or more hydroxyls are connected to the surface of the functionalized carbon nano-tube through covalent bonds and have certain crosslinking and chain extension functions if being applied in the synthesis of polyurethane, thus greatly increasing the bonding force between the interfaces of the carbon nano-tube and the polyurethane base body, and meanwhile, the existence of hydroxyls improves the dispersibility of the carbon nano-tube in the polyurethane base body, which greatly improves the mechanical properties in all aspects of the functionalized carbon nano-tube/ polyurethane composite material as compared the original carbon nano-tube/ polyurethane composite material. Furthermore, the carbon nano-tube is capable of changing the dielectric property of the polyurethane composite material or even producing conductive polyurethane, thus enlarging the application range and field of polyurethane.

The invention relates to the technical field of high-entropy alloys, and specifically discloses a double-arc fuse collaborative additive manufacturing method of a high-entropy alloy. The method is characterized in that raw materials are supplied based on a formula of the high-entropy alloy, wherein the raw materials include an alloy strip and flux core powder; the alloy strip and the flux core powder are prepared into a flux cored welding wire; and then a double-arc fuse collaborative additive manufacturing method is carried out to obtain a part or a blocky alloy as requirement. The method isstable in processes, high in cladding efficiency, high in preparation efficiency, wide in heat input adjusting range, low in cost, convenient to adjust the components of the alloy and the size of crystal grains; in addition, the method is applicable to manufacturing of massive high-entropy alloys as well as precise high-entropy alloy parts.

The present invention discloses a production process for an ultra high tenacity polyester industrial filament. The production process adopts a one-step method of spinning and stretching, and the method comprises the solid state tackifying, the melt spinning, the high temperature stretching, the heat setting, and the winding forming. The present invention adopts the innovative five-pair hot roll stretching heat setting process, compared with the traditional four-pair hot roll stretching heat setting, the the present invention adopts two-stage heat stretching, the processing method of the two-stage heat setting effectively reduces the stretching speed of fiber, and prolongs the heat setting time of the fiber, so that the fiber has an even stable orientation structure while the physical performance of products is ensured, the spinning condition is optimized. The ultra high tenacity polyester industrial filament prepared by utilizing the method of the present invention has the advantages that the intensity is high, the stretching and the dry heat shrinkage are reasonable, the heat resistant performance is good, and the impact resistant performance and the fatigue resistant performance are good.

A superabrasive fracture resistant compact is formed by depositing successive layers of ceramic throughout the network of open pores in a thermally stable self-bonded polycrystalline diamond or cubic boron nitride preform. The void volume in the preform is from approximately 2 to 10 percent of the volume of the preform, and the average pore size is below approximately 3000 nanometers. The preform is evacuated and infiltrated under at least about 1500 pounds per square inch pressure with a liquid pre-ceramic polymerizable precursor. The precursor is infiltrated into the preform at or below the boiling point of the precursor. The precursor is polymerized into a solid phase material. The excess is removed from the outside of the preform, and the polymer is pyrolized to form a ceramic. The process is repeated at least once more so as to achieve upwards of 90 percent filling of the original void volume. When the remaining void volume drops below about 1 percent the physical properties of the compact, such as fracture resistance, improve substantially. Multiple infiltration cycles result in the deposition of sufficient ceramic to reduce the void volume to below 0.5 percent. The fracture resistance of the compacts in which the poes are lined with formed in situ ceramic is generally at least one and one-half times that of the starting preforms.

A cable with a crimping terminal includes a cable including a conductor and an insulator including a plastic material, and the crimping terminal bonded to the conductor of the cable at a crimping portion by crimping connection. The conductor of the cable is bonded to the crimping terminal by a metallic bonding material at a crimping portion, and the metallic bonding material includes silver as a main component.

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 belongs to the technical field of high polymer composite materials and relates to a carbon fiber reinforced toughened epoxy resin composite material and its preparation method. The high polymer material is prepared from the following components, by weight, 100 parts of epoxy resin, 8-120 parts of a curing agent, 0.5-1.5 parts of a promoter, 160-500 parts of carbon fiber and 5-55 parts of thermoplastic. According to the invention, engineering thermoplastic is selected as a flexibilizer, and an appropriate solvent is selected; the engineering thermoplastic is made into a solution, and the solution is uniformly mixed with epoxy resin, the curing agent and the promoter; the solvent is removed; the resin system with the solvent removed is made into a resin film; by a routine resin film melt impregnation method, the resin film and carbon fiber undergo hot melting to be combined so as to prepare a carbon fiber reinforced epoxy resin prepreg; and furthermore, the highly-toughened carbon fiber reinforced toughened epoxy resin composite material is prepared.