51results about How to "Improve fragile" patented technology

The invention discloses vegetable gum based on modified starch. The vegetable gum is prepared from the following raw materials in parts by weight, 40-90 parts of modified starch, 3-30 parts of gelatinizing agents, 2-20 parts of plasticizers, 2-20 parts of polymer, 2-20 parts of plant fibers, 10-50 parts of deionized water and 1-15 parts of cross-linking agents. The raw materials are mixed and subjected to reaction at the temperature ranging from 20 DEG C to 120 DEG C for 10-200 minutes, and the vegetable gum is prepared by kneading, extruding and cutting procedures. The starch and the polymer or macro-molecules are compounded and mixed or grafted and copolymerized, the vegetable gum overcomes the shortcomings of poor plasticity, low tensile strength and frangibility of original starch and difficulty in degradation and non-renewable performance of the macro-molecules, the vegetable gum is degradable, renewable, low in cost, good in plasticity, stable on heat and resistant to aging, and a preparation method of the vegetable gum controls extrusion temperature, screw rotation speed, cutter rotation speed and granule cooling, so that granules cannot be adhered and are uniform in size and good in plasticity. The vegetable gum is applied to related products such as degradable plastics, capsules and food and drug packing materials.

Super-thin float glass consists of SiO2 71.5-72.5wt%, Al2O3 1.3-2.5wt%, Fe2O3 0.04-0.9wt%, CaO 6.0-8.20wt%, MgO 4.3-5.0wt%, K2O 0.5-1.5wt%, and Na2O 11.0-13.4wt%. Its advantages include higher transmittance and elastic modulus, better hardness and quality, and no production defect.

The invention discloses a radio frequency identification tag and a manufacturing method thereof. The radio frequency identification tag comprises a face layer, a thermal contraction layer, a release layer, a fragile radio frequency identification layer and an adhesive layer, wherein the face layer, the thermal contraction layer, the release layer, the fragile radio frequency identification layer and the adhesive layer are sequentially and mutually composite. The thermal contraction layer is made of thermal contraction polyvinylchloride, thermal contraction polyethylene glycol terephthalate, thermal contraction polyethylene, multi-layer coextrusion polyolefin, directional polystyrene, thermal contraction polypropylene or thermal contraction biaxially oriented polypropylene. Due to the thermal contraction layer, the radio frequency identification tag can be prevented from being recycled again; due to the release layer contained in the tag, when the tag is torn off, the fragile radio frequency identification layer can be separated from the face layer and the contraction layer and is left on the surface of an adherend, integrity of the tag is broken and the effect of preventing the tag from being recycled is achieved.

The invention belongs to the metal material and processing technical field, which relates to a steel material of hot-working die and its production process. According to the invention, the steel material of hot-working die comprises the element components by weight percentages: 0.38 to 0.42 of C, 0.35 to 0.45 of Mn, 0.55 to 0.65 of Si, 5.0 to 5.5 of Cr, 0.2 to 0.25 of Mo, 1.0 to 1.5 of V, less than or equal to 0.025 of S, less than or equal to 0.025 of P and the balance of Fe. According to the invention, the production process comprises the following steps: a step of smelting technology, a step of casting molten steel to form steel ingot, a step of forging or rolling into sectional material and a step of spheroidizing sectional material and annealing process, so that the technical process is simple and the operation is easy to control. The invention has a good and scientific element ratio, alloying and modification processing are employed, the invention has the advantages of good heat stability, high heat resistant fatigue performance, wear resistance, good hardenability and less deformation, a vacuum heat treatment and a surface strengthening processing are added for improving the work efficiency, reducing production cost, reducing or avoiding dies from breaking and cracking, thereby the hot-working die has long service life, high performance-price ratio and wide application.

The invention discloses a lens manufacturing process which comprises the steps of hot processing and cold processing, wherein the hot processing specifically comprises the following steps: ingredientpreparation, mold preparation, glass melting treatment, automatic compressionmolding, annealing treatment and lens blank testing; and the cold processing comprises the steps oflens grinding and polishing, lens cleaning, lens coating and lens testing. The lens manufacturing process provided by the invention is not only simple in process, but also highly intelligent, errors of traditional manual manufacturing can be avoided, the cost of lens production can be reduced, and the production efficiency can be improved. Moreover, a lens manufactured by the lens manufacturing process provided by the invention is not only good in quality, but also capable of alleviating defects of fragility and easy fogging, has effects of preventing blue light and ultraviolet light, and improves the comfort of a lens wearer.

The invention provides a bioactivity surface modification method used in degradable magnesium alloy. First, a layer of micro-arc oxide coating is prepared on magnesium or magnesium alloy; and with a fluorination treatment method, a fluorine-rich dense layer is prepared on the outer side of the micro-arc oxide coating. Therefore, the surface coating comprises the middle-layer micro-arc oxide coating and the outer-layer fluorine-rich layer. The middle-layer micro-arc oxide coating can control the degradation speed of the magnesium alloy in a living body environment, and assists in ameliorating poor wear resistance of a single fluorine coating and poor bonding strength between the single fluorine coating and the substrate. With the outer-layer fluorine-rich dense layer, the loose characteristic of the micro-arc oxide coating is ameliorated, and pH increasing rate of the coated alloy in the living body environment is reduced, such that early-stage inflammation and hemolysis probabilities are greatly reduced, and magnesium alloy implantation success rate can be improved. The method provided by the invention aims at solving problems such as high degradation speed, poor surface coating bonding strength, low wear resistance, and the like of biodegradable magnesium alloy.

The invention provides a display screen structure and an electronic device, which relate to the technical field of display. The display screen structure comprises a first screen connected with the main board through a flexible circuit board and provided with a channel at a position corresponding to a camera, wherein the channel penetrates the first screen in a direction from a position near the main board to a position far away from the main board; A second screen connected to the main board through a flexible circuit board and having a shape matching with the channel; a driving device connected to the second screen to drive the second screen to move, wherein the second screen can be displayed through the channel when the second screen is moved to the channel and the camera can acquire images through the channel when the second screen is not moved to the channel. As a result of that above arrangement, the problem of easy damage and poor waterproofing performance due to the exposure ofthe camera in the prior art can be improved.

In order to overcome the problems of insufficient compaction density and safety performance of the existing high-nickel ternary cathode material of the lithium ion battery, the invention provides a positive electrode material which comprises a positive electrode active material. The positive electrode active material comprises a secondary spherical nickel-cobalt-manganese ternary material and a single crystal nickel-cobalt-manganese ternary material which are mixed with each other, and the molar ratio of the secondary spherical nickel-cobalt-manganese ternary material to the single crystal nickel-cobalt-manganese ternary material is 1: 1-9: 1. Meanwhile, the invention also discloses a positive pole piece and a lithium ion battery comprising the positive pole material. The positive electrode material provided by the invention not only ensures the advantage of high gram volume of the nickel-cobalt-manganese ternary material, but also has good structural stability, overcomes the defects that the nickel-cobalt-manganese ternary material is easy to break and low in thermal decomposition temperature, and has higher thermal stability and higher compaction density.

The invention discloses a micro-grid operating inverter grid-connection and off-grid smooth switching circuit and a control method of the micro-grid operating inverter grid-connection and off-grid smooth switching circuit. The micro-grid operating inverter grid-connection and off-grid smooth switching circuit comprises a micro-grid operating inverter, a three-phase grid and a local alternating-current load, wherein the three-phase grid and the local alternating-current load are connected with the micro-grid operating inverter. The micro-grid operating inverter grid-connection and off-grid smooth switching circuit and the control method of the micro-grid operating inverter grid-connection and off-grid smooth switching circuit overcome the defects that the reliability is low, the inverter can be damaged easily and the safety performance is poor in the prior art and have the advantages that the reliability is high, the inverter is not prone to damage, and the safety performance is good.

A reinforced silica aerogel super heat insulation coating is prepared from, by weight, 32-35 parts of ethyl orthosilicate, a proper amount of hydrochloric acid, a proper amount of ammonia water, a proper amount of ethanol, a proper amount of deionized water, 0.5-0.7 parts of tetrapod-like zinc oxide whisker, 1-1.5 parts of trimethylchlorosilane, 0.4-0.5 parts of polyoxyethylene alcohol ether, 0.01-0.02 parts of lauryldimethylamine oxide, 0.4-0.6 parts of tung oil anhydride, 0.02-0.04 parts of a silane coupling agent KH550, 0.4-0.6 parts of sulfated castor oil, 70-75 parts of E-12 epoxy resin, 9-12 parts of xylene, and 6.8-7.4 parts of diethylenetriamine. Addition of modified tetrapod-like zinc oxide whisker in the invention improves the disadvantages of frangibility and low strength of silica aerogel and solves the problems of contraction, cracking and avalanche of the above provided product in the normal pressure drying process; and the coating has wide application prospect and great industrial popularization values.

A structure of a bearing pedestal of a three-roller bending machine comprises a bearing pedestal and heat-dissipating holes; a plurality of heat-dissipating through holes are disposed on the bearing pedestal, and the bearing pedestal has good heat dissipation, so the problem of easy damage of the bearing pedestal and the bearing due to excessive high temperature caused by friction is solved; the invention has good heat dissipation, can solve the problem of easy damage of the bearing pedestal and the bearing caused by large friction and high temperature, can increase the service life of the bearing pedestal and the bearing, and thus has good application effect.

The invention discloses a universal color master batch with high carbon black content and high melt flow rate and a preparation method thereof. When the mass content of carbon black in the universal color master batch is up to 50 to 60%, the universal color master batch still has higher melt flow rate, is easy to disperse in polymer melts with different viscosities, and particularly has PA and PETsystems with lower viscosities in the melt at high temperature. Meanwhile, the universal carbon black master batch is suitable for non-polar or weak-polar polymer systems such as PE, PP and PS, is also suitable for polar polymer systems such as PA, PVC, PET and ABS, and is a true universal carbon black master batch. The universal color master batch with high carbon black content and high melt flow rate is prepared from the following raw materials in parts by mass: 15 to 30 parts of oxidized polyethylene wax, 10 to 20 parts of polyolefin resin, 3 to 5 parts of chlorinated polyethylene, 50 to 60 parts of high-structure-degree carbon black and 0.5 to 1.0 part of a stabilizer.

The invention discloses a book cover. The book cover comprises a main cover body and a storage cover body, the main cover body comprises an outer layer, the inner lateral side of the outer layer is provided with a first inner layer and a second inner layer, the first inner layer and the second inner layer are spaced, the first inner layer and the outer layer form a first storage space, and the second inner layer and the outer layer form a second storage space. The storage cover body is arranged on the main cover body and provided with a storage space with a storage opening, the storage space of the storage cover body allows storage of materials such as paper sheets and the like, damages of the joint between the outer layer and each of the first inner layer and the second inner layer can be avoided, and accordingly service life of the book cover is prolonged.

The invention relates to the field of technological equipment, and discloses a method and a tool for installing and disassembling a roller. The tool for installing and disassembling the roller comprises an opening dual ring pillow, wherein the opening dual ring pillow comprises a first ring body and a second ring body which are connected axially, notches are formed in the first ring body and the second ring body, and the inner diameter of the first ring body is greater than that of the second ring body. The method for installing and disassembling the roller comprises the following steps that opening dual ring pillow is axially attached to the roller or an inner expanding sleeve which is arranged on a shaft body in a sleeving mode, the one end, away from the roller, of the opening dual ringpillow is knocked axially, in this way, when installing is carried out, the second ring body can be used for abutting against the inner expanding sleeve, and the first ring body is knocked; and whendisassembling is carried out, the first ring body can be used for abutting against the roller, and the second ring body is knocked. The whole process of installing and disassembling is more convenientand concise, because of the indirect transmission force of the opening dual ring pillow, the knocking force can be uniformly transmitted to the roller or the inner expanding sleeve, so that the innerexpanding sleeve is not prone to being damaged in the process of installing and disassembling.

The invention discloses a slicing method of a large-size ultrathin lithium niobate wafer. The slicing method comprises the following steps that chemical corrosion is carried out on a lithium niobate crystal bar by adopting a mixed solution of nitric acid and hydrofluoric acid; bar adhering operation is carried out on the corroded crystal bar, resin sheets are adhered to the head and the tail of the crystal bar, and resin strips are adhered to the right upper end and the two sides of the crystal bar; the adhered crystal bar is cut into a wafer, the adopted cutting fluid is a mixed solution composed of naphthenic oil, paraffin oil, polyethylene glycol monooleate, bentonite and barium sulfonate according to a certain mass fraction; debonding treatment is carried out on the wafer; and chemical corrosion is carried out on the debonded wafer, and finally the large-size ultrathin lithium niobate wafer can be obtained. The surface flatness is high, the crystal orientation deviation is small, the line mark depth is small, and the machining fragment rate is low.

The invention relates to the field of lighting technology and provides a handheld maintenance lamp. The handheld maintenance lamp comprises a columnar light source support, a first LED (light emitting diode) light source assembly arranged on the outer wall of the light source support, a transparent cover arranged outside the first LED light source assembly, a protecting mesh cover covering the transparent cover, and a driving device which is arranged under the light source support and used for driving the first LED light source assembly. The light source support is axially provided with an accommodating cavity, and a vertically-retractable hook is mounted inside the accommodating cavity. According to the handheld maintenance lamp, the LED light source is long in service life and highly reliable, so that the problem of frangibility of fluorescent light sources of existing maintenance lamps; the protecting mesh cover can protect the transparent cover and avoid breakage of the transparent cover when the maintenance lamp falls off; the hook structure embedded inside the accommodating cavity fundamentally solves the potential risk existing in existing lamps due to the fact that hooks are fixed to the head portions; meanwhile, the driving device is arranged under the light source, so that handholding operation can be facilitated, and meanwhile, the whole handheld maintenance lamp is compact in structure and safe and convenient to use.

The invention discloses a chip testing method, which is suitable for a chip testing system, and comprises a chip installation step: installing a plurality of chips on a plurality of electric connection seats of a chip testing device through chip installation equipment; a moving-in step: moving the chip testing device carrying the plurality of chips to one accommodating chamber of one environment control equipment; a temperature adjusting step: controlling a temperature adjusting device corresponding to the accommodating chamber to operate so as to enable the plurality of chips to be in an environment with a preset temperature; and a test step: supplying power to the chip testing device arranged in the accommodating chamber, so that each test module performs a predetermined test program onthe chips on the plurality of electric connection seats connected with the test module.

The invention relates to the technical field of lighting and provides a handheld maintaining lamp which comprises a columnar light source support, a light-emitting diode (LED) light source assembly fixed on a part of the lateral wall of the light source support, a transparent cover arranged on the outside of the LED light source assembly and a driving device arranged under the light source support and used for driving the LED light source assembly. A containing groove is formed in the other part of the lateral wall of the light source support far away from the LED light source assembly, and a hook capable of being overturned vertically and movably is arranged in the containing groove. An LED light source is long in service life and good in reliability, and the shortcoming that the existing maintaining lamp adopts a fluorescent light source and is easy to break is overcome. The hook structure is built in the containing groove, the hook can be pulled out when required, and the hook is overturned downwards automatically into the containing groove under the gravity when hanging is not required. Safety hazards caused by the fact that the hook is fixed at the head portion of the existing lamp are avoided. The driving device is arranged under the light source in the maintaining lamp structure, handheld operation is facilitated, and the whole lamp is compact in structure and safe and convenient to use.

The present invention provides a mechanism system. Said mechanism system includes a shell body, an upper machine body which can be connected with said shell body by means of turnable mode and a supporting device including a supporting shaft connected with said upper machine body and a supporting block connected with said shell body. In said supporting block there is a cavity, said supporting shaft can be passed through said supporting block via said cavity and can be up-down moved along said cavity. Said mechanism system can utilize the damping by mutual light fit between supporting shaft and said supporting block to provide a supporting force so as to make said upper machine body be fixed at any angle.

The invention discloses a vacuumizing system based on a high-temperature and high-pressure environment. The vacuumizing system comprises a sampling and testing integrated joint, wherein the sampling and testing integrated joint is a Y-shaped three-way joint, a lower interface of the three-way joint is hermetically connected with a vacuum bag through a connecting structure, and two upper interfaces of the three-way joint are respectively connected with a vacuumizing pipe and a vacuum measuring pipe through joints; and the vacuumizing pipe and the vacuum measuring pipe are respectively connected with a vacuumizing system and a vacuum measuring system. The system is good in state at high temperature and high pressure, reliable in performance and accurate in measured vacuum data; , use and replacement are convenient, the KF standard component is low in price, and the service life of the KF standard component is longer than that of an original vacuumizing and vacuum measuring system.