16results about How to "Avoid internal stress" patented technology

The application relates to the technical field of building material corrosion and rust prevention, in particular to an inorganic polymer reinforced concrete anticorrosive coating and a preparation method thereof. According to mass fractions, the inorganic polymer reinforced concrete anticorrosive coating comprises 60-70 parts of a base, 8-12 parts of an anti-cracking system, 10-15 parts of modified fillers, 5-8 parts of an additive and 15-20 parts of a solvent; the base is selected from alkali-activated metakaolin; and the preparation method of the modified fillers comprises the following steps: calcining composite fillers at 480-500 DEG C for 1.5-2 h, immersing the composite fillers in a 10wt% tannic acid solution for 10-12 h after cooling, immersing the composite fillers in a modified liquid after filtration, ultrasonic dispersing the composite fillers for 20-30 min, vacuum drying the composite fillers, crushing and sieving the composite fillers to obtain the modified fillers. The application provides an inorganic polymer reinforced concrete anticorrosive coating and a preparation method thereof, so as to solve the problems of large self-shrinkage, easy cracking and single function in the related art, and the coating can adapt to complex environments.

The application relates to the coating technical field and discloses a composite coating as well as a preparation method and application of the composite coating. The composite coating comprises an inner layer, an outer layer and a bonding layer arranged between the inner layer and the outer layer; the outer layer is a basalt fiber cloth; and the preparation raw materials of the inner layer comprise 100 parts by weight of a first epoxy resin, 10-40 parts by weight of chopped basalt fibers, 5-30 parts by weight of hexagonal boron nitride, 0.5-5 parts by weight of a coupling agent, 1-3 parts by weight of a surfactant, 0.5-2.5 parts by weight of an antioxidant and 1-15 parts by weight of a curing agent. The composite coating provided in the application can significantly enhance the bonding strength between the composite coating and a base body through the interaction between the various components, can avoid the falling-off of the composite coating, can significantly improve the acid resistance and halogen water corrosion resistance of the composite coating, and is suitable for industrial popularization.

The application relates to the technical field of food packaging, in particular to a degradable food packaging bag and a preparation process thereof. The packaging bag comprises two base films and a functional adhesive layer which is compounded between the two base films. The base film is made of raw materials including the following components in parts by mass: polybutylene adipate terephthalate 50-70 parts; polylactic acid 20-35 parts; corn starch 10-25 parts; and a compatilizer 2-6 parts. The functional adhesive layer is made of raw materials including the following components in parts by mass: water-based polyurethane emulsion 100 parts; hydrophobic silicon dioxide particles 3-15 parts; chitosan derivative modified micron zinc oxide 5-20 parts; and a plasticizer 1-5 parts. The application provides a method which considers the degradation, antibacterial property and mechanical property, and has the effects of being safer and more reliable.

The utility model relates to the technical field of faucet production equipment, in particular to a cooling device for faucet production. The cooling device for faucet production comprises a supporting frame, a control display screen, a cooling cavity, a water storage tank, a water inlet pipe and a water pump, the control display screen is installed below the left side of the top of the supporting frame, the cooling cavity is fixedly connected to the supporting frame, and the water storage tank is fixedly connected to the right side of the top of the supporting frame. And the right side of the top of the water storage tank is fixedly connected with a water inlet pipe. A cooling medium in the water storage tank is pumped to the annular water pipe through the water pump and is uniformly sprayed on the faucet blank through the spray head, so that the problems that most of traditional cooling modes adopt natural cooling or simple water cooling modes, the simple water cooling modes are non-uniform in cooling, the cooling speeds of all parts of the faucet blank are easily inconsistent, internal pressure is generated, and the cooling efficiency is low are solved. The product quality is influenced, and even the defects of cracks and the like of the product are possibly caused.

The utility model discloses a kind of gas turbine waste heat boiler drum supports, including base, backing plate and the saddle for supporting drum, two pieces of polytetrafluoroethylene plate are provided between the backing plate and base, two pieces of polytetrafluoroethylene plate are fixed on backing plate and base respectively, two pieces of polytetrafluoroethylene plate can be freely relatively moved, so that the saddle on backing plate can be freely relatively moved with base along the axial direction of drum.The contact surface of the backing plate and base of the utility model gas turbine waste heat boiler drum support is polytetrafluoroethylene plate, and the friction coefficient is small, so that the saddle for supporting drum can be freely relatively moved along the axial direction of drum relative to base;When drum thermal state expands, the structure effectively releases stress in drum;Base is increased between backing plate and steel frame, avoid support to directly contact with uneven steel frame, improve the flatness of contact surface surface.

This invention provides a chip flip-chip packaging method. A first solder is applied to the solder windows of a chip formed on a wafer, fixing the first end of a solder post to the solder window. A curing agent is filled between the solder posts. The solder posts are then ground so that their second ends are on the same plane, and a solderable layer is formed on the end face of the solder posts before the curing agent is removed. The second end of the solder post is fixed to a frame or substrate coated with a second solder, forming a potting gap between the second end of the solder post and the chip. Epoxy resin is then filled into the potting gap and encapsulates the chip. The melting point of the first solder is higher than that of the second solder. This invention uses solder posts on the chip solder window to create a potting gap between the chip and the frame or substrate. During a single epoxy resin filling, the epoxy resin flows directly into the potting gap and encapsulates the chip. Compared to processes requiring bottom filling with adhesive, this reduces the number of filling operations, lowers internal stress caused by varying degrees of curing of the adhesive with different filling operations, thereby simplifying production steps and improving production efficiency.

The utility model relates to waterproof coiled material one-time forming equipment, belongs to the technical field of high polymer material processing, and particularly relates to HDPE high polymer waterproof coiled material one-time forming equipment which comprises extrusion equipment, a conveying table and a cooling table and is further provided with an alternate composite cooling mechanism, a lifting platform, a cutting device, a winding device and a coiled material conveying path. The alternate composite cooling mechanism realizes composite cooling of the coiled material through alternate arrangement of a water cooling tank and an air cooling tank; the lifting platform is matched with the cutting and winding device to realize double-layer layout and convenient maintenance of the equipment; the roller assembly and the guide roller component guarantee smooth transmission of the coiled material. According to the high-density polyethylene waterproof roll cooling device, the effects of improving the roll cooling quality, improving the space utilization rate of a plant and optimizing the production process are achieved, and the problems that an existing high-density polyethylene waterproof roll production device is poor in cooling effect, large in occupied space and not smooth in production process are solved.

The application provides a low-temperature laminated co-extrusion adhesive film and a preparation method and a photovoltaic module, and relates to the technical field of photovoltaic devices.The low-temperature laminated co-extrusion adhesive film comprises a laminated EVA film layer and a TPO film layer, and the EVA film layer and the TPO film layer are fused at the interface part; the content of vinyl acetate in the EVA film layer is 15-40%, and the crosslinking degree of EVA is not less than 65%; the raw material for forming the TPO film layer comprises an ethylene-alpha olefin copolymer; the melt index of the ethylene-alpha olefin copolymer is 0.5-10 g / 10 min, and the melting point is 50-115 DEG C; the light transmittance of the low-temperature laminated co-extrusion adhesive film for light with a wavelength of 380-1100 nm is greater than 88%. The low-temperature laminated co-extrusion adhesive film provided by the application not only can realize low-temperature crosslinking, but also has high bonding performance with a base material and long-term anti-creep performance.

The present application relates to the technical field of skin bag material, and particularly relates to a weather-resistant elastic composite skin bag material and a preparation method thereof, which is prepared from the following components: 65-85 parts of elastic matrix resin, 10-20 parts of elastic reinforcing agent, 4-9 parts of weather-resistant agent, 1-4 parts of plasticizer, 0.5-2.0 parts of antioxidant, and 0.3-1.0 parts of lubricant. The present application designs a multi-component synergistic composite weather-resistant agent to achieve all-round weather resistance: abandoning the single action mode of traditional small-molecule weather-resistant agents, adopting bentonite, boron nitride and nano-silicon carbide as physical barrier phases, lanthanum oxide as a chemical stable phase, chitosan and sodium silicate as interface compatible phases, and nano-cellulose agent as a dispersion reinforcing phase.

The application discloses a combined electrostatic adsorption wafer heating disc and a processing method, and aims to solve the problems of poor heat conduction performance of an integrated alumina ceramic adsorption disc relative to metal and difficulty in controlling temperature uniformity. The application comprises an electrostatic adsorption disc, a heating unit and a cover plate, the heating unit is connected between the electrostatic adsorption disc and the cover plate, the electrostatic adsorption disc is made of ceramic material, an electrode wire is arranged in the electrostatic adsorption disc, and the heating unit comprises a metal substrate capable of generating heat. The combined electrostatic adsorption wafer heating disc comprises the electrostatic adsorption disc made of ceramic material and the metal substrate made of metal material, the high heat conduction and high strength of metal are combined with the excellent insulation and corrosion resistance of ceramic, and the ultrafast heat response and the extremely high in-plane temperature uniformity of the wafer are realized.

The utility model relates to the technical field of high polymer material crosslinking process, and provides an ultraviolet irradiation crosslinking device for a cable insulation layer, which comprises a plastic extruding machine head used for wrapping an insulation material outside a conductor to form an insulation wire core; the ultraviolet light irradiation cross-linking machine is positioned on one side of the machine head of the plastic extruding machine and is used for performing ultraviolet light irradiation on the insulated wire core; the traction unit is provided with a first guide wheel and a second guide wheel, the first guide wheel movably abuts against the conductor, and the second guide wheel movably abuts against the insulated wire core; the heating unit is positioned between the first guide wheel and the extruding machine head and is used for heating the conductor; the cooling unit is positioned on the side of the ultraviolet light irradiation cross-linking machine and is used for cooling the insulated wire core; the first guide wheel and the second guide wheel jointly ensure that the conductor and the insulated wire core keep proper tension in the whole production process, and ensure that the conductor and the insulated wire core are positioned at correct working positions in the machine head of the plastic extruding machine and the ultraviolet irradiation cross-linking machine.

This invention provides a high-performance copper-phosphorus alloy based on grain optimization and its preparation method. The copper-phosphorus alloy comprises the following components in the indicated mass percentages: Cu 75%-85%, P 10%-15%, Al 2%-5%, Ti 1%-3%, rare earth elements 0.1%-0.5%, and the remainder being Fe; the rare earth elements are one or more combinations of cerium, lanthanum, and dysprosium. The preparation method includes batching, smelting, preliminary cooling, casting and rolling, rapid cooling, heat treatment, machining, and surface treatment. The copper-phosphorus alloy of this invention achieves high performance through grain optimization and is suitable for industrial applications requiring high strength, high hardness, and good plasticity and toughness.

The automobile door handle tolerance adjuster effectively solves the problem that the automobile door handle is inconvenient to install with the car plate; the automobile door handle tolerance adjuster comprises an upper and lower axial base, a plurality of elastic buckles are arranged at the lower end of the base, a plurality of wedge-shaped blocks corresponding to the elastic buckles are arranged at the lower end of the base, a first inner hexagonal screw is detachably connected in the base, a rotation prevention nut located below the base and capable of cooperating with the wedge-shaped blocks is detachably connected below the first inner hexagonal screw, a handle locking nut located above the first inner hexagonal screw is threadedly connected in the base, and a second inner hexagonal screw is detachably connected in the handle locking nut; the structure is simple, novel in design, convenient to use and high in practicability.

The present application relates to the technical field of magnesium foil material, in particular to a vacuum evaporation magnesium film, a preparation method and application thereof, the magnesium film comprises a substrate and a thin film layer, the material of the thin film layer is magnesium and is covered on the surface of the substrate by vacuum evaporation; the preparation method uses aluminum foil, copper foil, gold foil, silver foil, nickel foil, molybdenum foil, titanium foil, tin foil, stainless steel foil, polymer composite metal foil, metal alloy foil, carbon-coated metal foil, polyimide and high polymer material as the substrate, a layer of high-purity magnesium thin film is uniformly deposited on the surface of the substrate by controlling the vacuum evaporation process; when the magnesium film is applied to a magnesium battery, the substrate provides good electrical conductivity and mechanical support, and the magnesium layer directly participates in the electrochemical reaction as an active material, which not only improves the energy density and cycle life of the magnesium battery, but also simplifies the manufacturing process and reduces the cost; the magnesium negative electrode prepared by the method has excellent electrochemical performance and stability, and has good application prospect.

The application discloses a kind of gypsum-based fire-retardant board preparation process heat stability optimization method, comprising the following steps: step one: preparation heat stable type modified gypsum powder, step two: preparation interface compatible type compound flame retardant, step three: preparation homogeneous dispersion type gelling slurry, step four: using gradient compaction layering forming process preparation blank, step five: implementation crystal type control type curing process, step six: after low temperature heat baking later modification treatment;The inorganic-organic composite wet modification that the gypsum matrix is carried out in the application can optimize the growth structure of gypsum crystal, make crystal arrangement more dense, effectively slow down the dehydration rate and crystal form conversion speed of gypsum matrix at high temperature, fundamentally improve the thermal stability of matrix itself.

The present application relates to hydrogen energy preparation technical field, specifically relates to a kind of porous transport layer for proton exchange membrane water electrolysis cell and its preparation method and application.The porous transport layer includes titanium matrix and composite coating, the composite coating includes Ta barrier layer, PtTa transition layer and Pt surface conductive layer in turn from matrix to outside.The present application adopts magnetron sputtering process to prepare the composite coating, with the characteristics of process parameter precision controllable, batch preparation repeatability excellent, can be widely applied to the surface modification of porous transport layer in proton exchange membrane water electrolysis device, effectively improve the overall performance and service life of electrolyzer.