84results about How to "No cracking phenomenon" patented technology

The invention belongs to the technical field of materials, and particularly relates to a hybrid fiber reinforced friction material for train braking and a preparation method thereof. In the invention, a composite modified phenolic resin is used as an adhesive, and hybrid fibers, including carbon fiber, metal fiber, inorganic mineral fiber and the like, are used as the reinforcing fibers. Compared with the prior art, the invention improves the contour machining property of the organic synthetic brake, and the yield of the material is high; the brake has stable frictional property at different braking speeds, does not has obvious degradation of frictional property at high speed, and does not have the phenomena of shedding and cracking on the working surface after the braking test. The friction material provided by the invention can be widely used for manufacturing brake pads, brakes, brake shoes and the like in braking systems of passenger and freight trains, municipal rail transportation, subways and the like.

The invention relates to a method for preparing a veneer ceramic-free full anatomic form zirconia dental crown. The method comprises the steps of: adopting a CAD (Computer-aided Design)/CAM (Computer-aided Manufacturing) system, and clinically fabricating an impression and a plaster model after tooth preparation; scanning by using a three-dimensional model scanner, establishing a digital model ona computer, and designing a dummy form through computer assistance; cutting a dummy form through a numerically-controlled lathe, trying wearing on the model, and adjusting the form; burnishing; painting; and glazing, and finally completing the fabrication of the dummy. The veneer ceramic-free full anatomic form zirconia dental crown provided by the invention has high strength and good light transmission, the treatment of applying ceramics is not required, and no hazard of ceramic fracture exists; the degree of precision is high due to computer control during the overall process; and the grinding amount for tooth preparation is small, and an ideal effect can be achieved with 1mm space.

The invention provides a diaphragm for a battery, comprising a base material. The base material comprises through holes, wherein the base material contains polyimide and additives, and the additives are inorganic crystal whiskers and/or orthosilicate ester. The diaphragm prepared by the invention has excellent high-temperature performance, the heat shrinking property of the diaphragm is below 1.1 percent below 400 DEG C, and no cracking phenomenon occurs below 400 DEG C. The mechanical property of the diaphragm is excellent, the tensile-strength of the diaphragm is above 100 Mpa, while the tensile-strength of the diaphragm prepared by the prior art is only 90 Mpa. In addition, perforating substances used by the invention can effectively adjust the average diameter of a hole of the diaphragm within a better range of between 10 and 100 nanometers, thereby guaranteeing the smooth passing of lithium irons in the battery using the diaphragm, reducing the internal resistance of the battery, and having no short circuit.

The invention discloses a magnesium oxide board which is prepared by extruding a reinforced material and slurry into a sheet through forming equipment, wherein the reinforced material is composed of a non-woven fabric and a fiberglass mesh or other reinforced materials; the slurry comprises the following components in parts by mass: 100 parts of magnesium oxide with the magnesium content of at least 85% and the activity degree of at least 62%, 80-90 parts of anhydrous magnesium chloride water solution with the concentration of 10-40 baume degrees, 10-15 parts of lightweight filler A, 15-20 parts of lightweight filler B, 1-5 parts of silicon dioxide and 1-10 parts of foaming agent; the particle size of magnesium oxide is 250-400 meshes; preferably, the lightweight filler A is one or more selected from perlite, polyphenyl granules, gangue and vermiculite, and the lightweight filler B is one or more selected from wood flour, straw, rice husk and bamboo fiber; more preferably, the lightweight filler A is hole-closed perlite, and the lightweight filler B is straw sawdust of 80-100 meshes. The invention also discloses a preparation method of the magnesium oxide board. The magnesium oxide board prepared according to the invention is high in strength, not easy to get damp, strong in fire resistance and free of cracks after being fired at high temperature; in addition, the preparation method of the magnesium oxide board disclosed by the invention is short in time.

The invention relates to a method for dyeing an all-zirconium tooth by using a film. The method comprises the following steps of: producing a polyethylene (PE) film with stronger autohension by taking polyethylene as a main raw material by a multi-layer extrusion process; and printing or print-coloring the film, shearing the colored film of which the size is matched with that of a precolored dental crown and wrapping on the surface of the dental crown, heating to ensure that coloring particles are transferred to the surface of the dental crown to be dyed, sintering, polishing, and glazing to finish the whole dyeing process and obtain a final restoration. The invention has the advantages that: the method is easy to operate, slightly affects the transparency of zirconia dental crowns, and can meet aesthetic requirements of customers on zirconia all-porcelain teeth more easily; the coloring mode is more flexible, and the targeted color printing can be performed according to the requirements of the customers; by the method, the color difference between dental crowns can be intuitively reflected immediately, and the problem that final colors of staining fluid products can be seen only after the staining fluid products are sintered is solved; and the phenomenon of porcelain fracture is avoided, and the safety factor is high.

A preparation method of a porous alpha-alumina membrane comprises the following steps: carrying out an annealing and electric polishing pretreatment on a high purity aluminum foil; taking the processed aluminum foil as the positive electrode, and graphite as the negative electrode, then carrying out two-step positive electrode oxidation in a mixed solution of phosphoric acid and aluminum oxalate to obtain an aluminum-base-containing porous anodic alumina membrane; subjecting the obtained aluminum-base-containing porous anodic aluminum membrane to a pore enlarging treatment; then subjecting the pore-enlarged aluminum-base-containing porous anodic alumina membrane to a water boiling treatment or a hydrothermal treatment; then removing the aluminum base from the aluminum-base-containing porous anodic alumina membrane, which has been treated by water boiling or a hydrothermal treatment; using a sodium citrate solution to remove the baffle layer and alumina hydrate on the external layer of the porous alumina membrane from the aluminum-base-free porous anodic alumina membrane so as to form a periodical hexahedral densely-arranged alumina through hole structure finally; and sintering the prepared alumina membrane with a periodical hexahedral densely-arranged alumina through hole structure in a muffle furnace at a high temperature so as to obtain porous alpha-alumina membrane.

The invention discloses a repair technology for leather clothing with coating cracks. The repair technology comprises steps such as cleaning, filling, sizing and the like. The key process of the repair technology is the filling process, which is the key to solve the cracks of the coating. In the filling formula, excellent filling ability and permeability of filling type acrylic resin are utilized to radically realize the purpose of filling cracks and solving chromatic aberration. Meanwhile, the excellent penetrating quality of the filling fluid enables the formed resin film to form an extremely thin three-dimensional netted structure on the surface layer and inner part of the lather, so that the bonding firmness of the film is very high. The lather clothing treated by the repair technology has uniform, smooth and flat surfaces and bright color, and solves a problem that the leather clothing is difficult to repair due to cracks of coating after being worn for a long time. The repair technology provided by the invention can be used for repairing the leather clothing with coating cracks.

The invention discloses a construction technology for gypsum block masonry. The gypsum block masonry has a simple structure and attractive appearance, is convenient to construct, environment-friendly, fire-resistant and quake-proof, and saves manufacturing cost. The construction technology comprises masonry of the gypsum block masonry and construction of decorative layers. The invention has the technical key point that: a wall cushion is arranged on the lower part of the gypsum block masonry; gypsum blocks of the gypsum block masonry are in lap joint with one another in an up-and-down staggered mode and are constructed by using binding slurry; the gypsum block masonry is provided with tie bars equidistantly on each gypsum block along a main body structural column or a wall height direction; and the tie bars extend into the masonry. By the construction technology for the gypsum block masonry, the technical problems of low efficiency, long construction period, large pollution, large occupied space of heavy walls and non-low-carbon and non-environment-friendly building materials in the traditional partition wall construction technology are solved.

The invention relates to a field patching method after damage of a zinc coating of an in-service power transmission tower. The field patching method comprises the following steps of: (1) surface polishing treatment of using an angle grinder to oxidize a surface of angle steel which damages the zinc coating and removing a corrosive layer, rusty spots and oxidized spots to expose metallic luster of a metal material; (2) surface refining treatment of using an abrader to grind the surface gradually with abrasive paper from coarse to fin until the surface is like a mirror surface; (3) surface cleaning and drying of cleaning the surface by using a cotton ball containing absolute ethyl alcohol to remove sand particles and dust on the surface, then using acetone to wipe the surface, and removing oil grease to enable the surface to be dried rapidly; (4) spraying Subaru cold galvanized coating until a thickness of a film is up to 80-100 microns; and (5) finishing drying. As the method is used for dealing with the damaged zinc coating, good film-forming effects of the Subaru cold galvanized coating, strong adhesive force and no aging and fracturing phenomenon are achieved, and an original service life of a lightning rod tower is kept.

The invention relates to a yellow near-infrared high reflective coating and a preparation method of the yellow near-infrared high reflective coating. The yellow near-infrared high reflective coating comprises the following components in percentage by weight: 20 to 50% of yellow near-infrared reflective pigments, 10 to 50% of a film-forming matter, 30 to 60% of a solvent and 4 to 30% of an additive. The film-forming matter is organic silicon resin, and the solvent is water or C1-C4 alcohol. The invention further provides the preparation method of the yellow near-infrared high reflective coating. The yellow near-infrared high reflective coating is high in reflectivity, bright in yellow chrominance and good in mechanical properties, and applied to outer surfaces of building exterior facades and top layers or oil storage tanks, vehicles and aircraft shells and ship decks to obviously lower temperature inside a coating material.

The invention discloses a layer-to-layer registration control method for inner layers of an HDI (High Density Interconnector) board. The method comprises the following steps: performing earlier-stage detection on a film used for making inner layer lines and patterns, wherein the earlier-stage detection of the film includes earlier-stage compensation of the film, and detection and picking of the used film in order to ensure that the rising and shrinking of the used film are within +/-1MIL, and the rising and shrinking of a diagonal line of the used film are within +/-1MIL; setting a monitoring point on the picked and used film which is proved to be qualified by detection; and repeatedly measuring rising and shrinking numerical values of the film by 200PNL/time and recording the rising and shrinking numerical values during making of the inner layer lines and the patterns with the film, and measuring rising and shrinking data of the film and recording the rising and shrinking data after the inner layer lines and the patterns are made. The technical scheme has the advantages that the defects of a current production flow can be overcome, and the design is reasonable and novel.

The invention provides an anti-fracturing solid wood composite board and a processing method thereof. At least one non-impregnated fiber layer is arranged on a base material, the upper face and the lower face of the non-impregnated fiber layer are respectively provided with at least one impregnated layer, the non-impregnated fiber layer, the upper impregnated layer and the lower impregnated layer form an anti-fracturing fiber buffering layer, and the fiber buffering layer and the base material are composited in a hot-press mode to form the anti-fracturing solid wood composite board. The anti-fracturing solid wood composite board has the advantages that the fracturing phenomenon caused by different expansion factors is avoided, and surface resin can not fracture due to expansion or shrinkage of the base material; production cost is not increased, the processing method is simple and practical, and the anti-fracturing solid wood composite board can be suitable for industrial mass production.

The present invention overcomes the deficiencies of the prior art, and provides a pre-embedded device for the wall-piercing casing with a telescopic function, which prevents the phenomenon of cracking caused by the reserved holes in the wall, and at the same time plays the role of sealing the connecting pipe and making the wall beautiful; In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a pre-embedded device for wall-piercing casing with telescopic function, including an outer casing, an inner casing and a sealing module, the outer casing and the inner casing are both cylindrical structure, the outer sleeve is movably fitted on the inner sleeve, and a positioning boss is provided on the outside of one end of the inner sleeve, the outer sleeve and the inner sleeve cooperate to form a telescopic sleeve, and the sleeve The parts are pre-buried in the wall, and the two ends of the set are provided with sealing modules, and the sealing modules are used for positioning the plug-in external pipes and wires, and can seal the plug-in parts; the present invention can be widely used in The field of wall bushings.

The invention provides a liquid crystal display device which comprises a panel, an adhesive layer and an adhesive medium, wherein the panel comprises a glass layer and a lower polarizing film; the lower polarizing film is bonded and fixed to the lower surface of the glass layer; the surface area of the lower polarizing film is smaller than that of the glass layer; the adhesive layer is arranged on the lower surface of the glass layer along an outer contour edge of the lower polarizing film; the lower surface of the glass layer is fixedly bonded to the surface of the adhesion medium through the adhesive layer. For the fixation of the panel and the adhesive medium, the glass layer and the adhesive medium are fixedly bonded through the adhesive layer in the invention; when a working temperature of the liquid crystal display device changes, the deformation quantity generated by the glass layer under the change of temperature is insufficient to deform or crack the panel, so as to avoid the occurrence of panel cracking phenomenon due to excess deformation quantity of the lower polarizing film, to ensure the panel working stability, and to be beneficial to the frameless design of the liquid crystal display device.

The invention discloses a cell preservation solution, which is characterized by comprising, by weight, the following materials: 15.00-35.00% of methanol, 0.20-0.35% of proclin300, 0.10-0.52% of EDTA,0.10-0.23% of NaCl, 53.20-68.70% of acetic acid, 2.30-25.0% of albumin, 0.10-1.00% of glucose, 0.5-0.9% of normal saline and 0.1-1% of chromium chloride. By using the method, the collected cells can be well preserved in practice, and the morphology, activity and structure features of the original cells can be kept completely without the phenomenon of autolysis or burst of the cells. In addition, the cell preservation solution is simple in composition, low in cost, simple in use and convenient to operate. The cell preservation solution is suitable for promotion and used.

The invention relates to a carrier core material and a manufacturing method of the carrier core material, a carrier and an electrostatic charge image developing agent. The carrier core material comprises the following main components and auxiliary components, wherein the main components comprise 72.0-72.5 mol% of Fe2O3, 8.0-8.5mol% of Mn3O4, and 19.0-19.5mol% of MgO; the additive amounts of the auxiliary components are as follows (by weight percent of the main components): 0.04-0.06wt% of V2O5, 0.10-0.12 wt% of CaO, and 0.01-0.03wt% of SiO2. A carrier particle containing the carrier core provided by the invention has good mobility, the electric quantity of a color matching agent is stable, a fracture phenomenon and fragments are not generated for long time use, the developing agent is used for an image forming device and can control the degradation of image quality.

The invention relates to a machining method for a large high-strength stamping part with an inner hole. According to the specific method, sample putting and spreading, blank part size determining, blank part cutting, stamping, inner hole cutting, external straight side shearing, external curve side cutting and leveling are sequentially carried out according to the material performance, the plate thickness, the part shape, the size and related technical requirements of the large high-strength stamping part with the inner hole. Thus, the machining method has the following beneficial effects that equipment with the cut fracture surface quality being relatively high is adopted to machine the size of the inner hole and the size of an outer hole of a stamped blank part, and it can be ensured that no pull crack phenomenon or an extremely small number of pull crack phenomena of the part appear during profiling; and by means of the machining manners of manufacturing an explorator for manual cutting and manufacturing a shearing sample plate for shearing a straight side, the cost of manufacturing a large number of dies can be saved, the die manufacturing time and the die testing and repairing time can be saved, the production cost can be greatly reduced, and timeliness of production is guaranteed.