82results about How to "No reduction in mechanical strength" patented technology

The invention discloses a method for etching holes by eroding an aluminum foil, which comprises the steps of pretreatment, first level corrosion, second level corrosion, post treatment and drying. The first level corrosion comprises the following steps of: putting the aluminum foil after the pretreatment into mixed solution of hydrochloric acid and sulfuric acid, wherein the mixed solution contains 0.5 to 1.0 N / L of aluminum, the temperature of the mixed solution is between 65 and 90 DEG C and the total acidity of the mixed solution is 5.0 to 8.0 N / L; and applying 45 to 80 seconds of direct current of which the current density changes along with the time to perform electrolytic corrosion for etching the holes in mainly three modes that: one, the current density changes from high to low along with the time; two, the current density changes from low to high and then to low again; and three, the current density changes form low to high. The hole etching mode that the current density changes from high to low along with the time improves the specific volume by 7 to 12 percent compared with the existing hole etching method with constant current density under the premise of not reducing the mechanical strength of the aluminum foil.

A self-lubricating nanometer composition is prepared from fusable polyimide (100 wt. portions), nanometer inorganic material (1-25), coupler (0.1-2) and carbon fibre (5-30). The composition suitable for vacuum, radiation and high-temp. special environment.

The invention relates to a selective hydrodesulfurization catalyst of a combined alumina base and a preparation method thereof. The carrier of the catalyst is compounded by macroporous alumina with a specific surface of 280-300m<2> / g, and a pore volume of 0.8-0.9mL / g as well as fenestral alumina with a specific surface of 250-280m<2> / g, and a pore volume of 0.3-0.4mL / g; the active components of the catalyst are cobalt and molybdenum; the addition agents of the catalyst are magnesium and boron. The preparation method of the catalyst comprises: mixing the macroporous alumina and the fenestral alumina; adding sesbania powder and nitric acid, then carrying out mixing kneading, shaping, drying and baking on the mixture to prepare the compound carrier of the alumina; then loading the addition agents of magnesium and boron as well as the active components of cobalt and molybdenum in sequence, then carrying out drying and baking on the mixture to prepare the catalyst. The catalyst has excellent gasoline selectivity and hydrodesulfurization activity, low loss of product researching octane number, high liquid yield, and the like.

The invention discloses a method for improving a composite resin adsorption function and strengthening its hydrophilic properties of adsorption. The steps include: (A) it bulges the chlorine-ball in the nitrobenzene or dichloroethane, and adds the catalyst, and accesses to the oxidant, and gradually warms up to 20 ~ 120deg.C, then it determines the response end by controlling the residual chlorine content of resin to achieve the high crosslinked polystyrene resin. (B) After the reaction, it pumps out the liquor of reaction, and washes the oxygenated high crosslinked polystyrene resin with organic solvent, and then it directly adds a functional reagent to further react with the residue chloromethyl on internal and external surface of resin to achieve the oxygen high crosslinked polystyrene resin. In which, the amount of the functional reagent is 0.5 to 3 times of the high amount of cross-linked polystyrene resin.

The invention discloses a pulp. The pulp comprises the following raw material components at weight ratio: 50-60 straw pulp, 10-20 raphioid hardwood fiber, 1-10 silkworm cocoon, 2-8 debregeasia edulis, 3-8 agar, 1-2 adhesive, 1-2 flexibilizer, 1-2 waterproof agent and 1-2 adjuvant. The pulp enables the paper whitenness to meet the requirement of paper without lowering the mechanical strength of paper, and ensures low yellowing probability and stable quality of paper. A Sirain high-side-chain-density paper-making retention and filtration aid, which has higher flocculation capability than linear molecules and particularly extremely strong retention capability to fiber fines, is adopted. The high-strength positive charge density also helps to retain more fillers. The common raw materials, such as straw pulp, silkworm cocoon, raphioid hardwood fiber, debregeasia edulis and the like, are adopted, epoxy resin and other flexibilizers are added to increase the tenacity, and agar is added to increase the smoothness of paper, so that an embroidery picture book prepared from the pulp has a certain glossiness and nice color.

The invention discloses a halogen-free flame retardant, and application and a polycarbonate composition thereof. The halogen-free flame retardant comprises the following components in parts by weight: 5-30 parts of polyphosphazene, 1-10 parts of phosphate and 1-5 parts of PTFE (polytetrafluoroethylene). According to the halogen-free flame retardant disclosed by the invention, the polyphosphazene flame retardant and the traditional phosphate flame retardant are matched to obtain the new halogen-free flame retardant; and the halogen-free flame retardant can be used as a polycarbonate or polycarbonate-ABS (acrylonitrile-butadiene-styrene) alloy flame retardant. The halogen-free flame retardant enhances the flame retarding efficiency of the phosphonitrile flame retardant, greatly reduces the consumption, and lowers the production cost; and meanwhile, the halogen-free flame retardant has favorable compatibility with high polymer materials, and does not lower the mechanical strength of the material, thereby having wide application prospects.

The invention relates to a halogen-free flame retardant composition for polyesters and an application method thereof. The flame retardant composition is prepared through compounding any one of melamine cyanurate (MCA), melamine polyphosphate (MPP) and aluminium diethyl hypophosphite (1240) with PDPTP (polyphenyl thiophosphoric acid) in any weight preparation. The flame retardant disclosed by the invention has the advantages of multielement synergy, good material compatibility, high flame retardancy, environmental friendliness and the like.

The invention relates to a triazine triphenyl phosphinic acid ethyl ester flame retardant composition and an application method thereof. The flame retardant composition is prepared by compounding and uniformly mixing any two, three or four of melamine cyanurate (MCA), melamine pyrophosphate (MPP), 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and pentaerythritol methyl silicate (PEMS) with triazine triphenyl phosphinic acid ethyl ester (TTPE) at any proportion, wherein the weight part of the TTPE is greater than zero. The flame retardant composition provided by the invention has the advantages of multielement synergic effect, good flame retardancy, good compatibility with materials, low cost, zero halogen, environmental protection and the like, can be used as a flame retardant for polyester PET, polyester PBT, polyurethane, polypropylene, epoxy resin and other materials, and has excellent application and popularization prospects.

The invention relates to a triazine triphenyl phosphinic acid methyl ester flame retardant composition and an application method thereof. The flame retardant composition is prepared by compounding and uniformly mixing any two, three or four of melamine cyanurate (MCA), melamine pyrophosphate (MPP), 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and pentaerythritol methyl silicate (PEMS) with triazine triphenyl phosphinic acid methyl ester (TTPM) at any proportion, wherein the weight part of the TTPM is greater than zero. The flame retardant composition provided by the invention has the advantages of multi-element synergic effect, good flame retardancy, good compatibility with materials, low cost, zero halogen, environmental protection and the like, can be used as a flame retardant for polyester PET, polyester PBT, polyurethane, polypropylene, epoxy resin and other materials, and has excellent application and popularization prospects.

The invention relates to a triazine triphenyl phosphinic acid sec-butyl ester flame retardant composition and an application method thereof. The flame retardant composition is prepared by compounding and uniformly mixing any two, three or four of melamine cyanurate (MCA), melamine pyrophosphate (MPP), 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and pentaerythritol methyl silicate (PEMS) with triazine triphenyl phosphinic acid sec-butyl ester (TTPS) at any proportion, wherein the weight part of the TTPS is greater than zero. The flame retardant composition provided by the invention has the advantages of multielement synergic effect, good flame retardancy, good compatibility with materials, low cost, zero halogen, environmental protection and the like, can be used as a flame retardant for polyester PET, polyester PBT, polyurethane, polypropylene, epoxy resin and other materials, and has excellent application and popularization prospects.

To provide a semiconductor device and method of manufacturing the same, circuit board, and electronic apparatus, where electrical connections can be established easily with high reliability. The method of manufacturing the semiconductor device includes a first process of forming first through-holes 18 at, places where electrodes 14 are formed, in a semiconductor element 10 provided with the electrodes; a second process of providing an insulating material 22 in a region, including the inside parts of the first through-holes 18, so that second through holes 24 which pass through the insulating material 22 are formed; and a third process of providing a conductive member 28 inside the first through-holes 18 so that it passes through the second through-holes 24.

The invention provides a method for preparing carbon fiber heat insulation hard felt by taking water-soluble phenolic resin as a curing agent. The method comprises the steps that firstly, carbon fibersoft felt is introduced into a dipping tank storing the water-soluble phenolic resin to be subjected to dipping treatment, redundant dipping liquid is extruded out through extruding wheels after dipping is completed, then the carbon fiber soft felt is introduced into a low-temperature drying oven to be subjected to dewatering treatment, and after dewatering treatment is completed, carbon fiber prepreg soft felt is obtained; secondly, the carbon fiber prepreg soft felt is put in a mold and changed into a carbon fiber hard felt blank through hot-pressing curing treatment in a hot pressing machine; and thirdly, the carbon fiber hard felt blank is sintered in a vacuum high-temperature furnace, and the graphitized carbon fiber heat insulation hard felt is obtained. According to the method, thewater-soluble phenolic resin is adopted to replace a phenolic resin organic solvent solution to serve as the curing agent, multiple technological steps and technological parameters are adaptively changed, and finally the problems that when a traditional organic solvent is used, environmental pollution is serious, safety dangerousness is high, occupational injuries are serious, transportation andstorage are difficult, and the cost is high are avoided.

The invention relates to a tension tester, comprising an inner sleeve shell, a pressurization hydraulic oil cylinder, an oil cylinder chamber, an oil storage chamber, a pressure detector, a displacement detector and two cable-end safety lock nuts of a cable, wherein the central part of the inner sleeve shell is hollow; the pressurization hydraulic oil cylinder is mounted at the central part of outer rim of the shell; the oil storage chamber and the oil cylinder chamber are coaxially installed at two sides of the pressurization hydraulic oil cylinder; a place located between two adjacent chambers is sealed as needed; pressure oil among the pressurization hydraulic oil cylinder, the oil storage chamber and the oil cylinder chamber is used as a power working medium; and the pressure detector and the displacement detector are respectively installed at two sides of the inner sleeve shell and used for detecting changes of pressure and displacement in real time. The tension tester provided by the invention has the advantages of stable performance, advanced technology, a high level of automation, accurate testing precision and limiting and overload protection functions.

The invention discloses a making method of kraft paper. The making method comprises the following steps: 1) pre-treating wood fibers; 2) adding sodium hydroxide and sodium sulfide in residual black liquor from the step 1) and performing secondary digestion to obtain a pulp material; 3) bleaching the pulp material obtained from the step 2); 4) adding a sizing material, a dye and a paper making retention and drainage agent, and performing reinforced evolution screening to remove impurities; and 5) mixing pulp with America waste paper and making the mixed pulp into paper in a paper making machine. The adopted bleaching technology allows paper whiteness to meet paper requirements, but does not reduce the mechanical strength of paper, and meanwhile the paper is not yellowed easily and is stable in quality. A Sirain paper making retention and drainage agent with high branch chain density adopted in the method has a flocculation capability more powerful than that of linear molecules and especially has an extremely strong retention capability for fine fibers. High strong positive charge density is also helpful to retain more filler. The method is simple in preparation technology and easy to operate and for industrial production.

The present invention relates to a foam rubber material for a weather strip comprising a crosslinked rubber sponge material having a load value ratio satisfying the following relationship: load value ratio %=B / A*100<=50, wherein A is a load value at 50% compression in the course of compression deformation, and B is a load value at 50% compression in the course of returning from the deformation.

The invention provides an insect-proof multi-layer eucalyptus wood board and a production method thereof. The production method of the multi-layer board comprises the steps of single plate thin platesorting, thin plate glue applying, cold pressing, hot pressing, standing curing, dust scraping, sanding, repair, trimming and plate pasting, and is characterized in that a layer of insect-proof curedfilm is sprayed at the peripheral surface, the upper surface and the lower surface of a slab before first hot pressing and final hot pressing to prevents glue from being dried too quickly during the hot pressing process and maintain stress inside the multi-layer board, the urea-formaldehyde glue can be fully reacted completely, the formed multi-layer board is not prone to mildewing, in the use process of a user, volatile formaldehyde is also reduced, and after hot pressing, the board is subjected to standing curing, sanding and plate pasting, so that the insect-proof multi-layer eucalyptus wood board product can be obtained by edge sawing and packaging.

The invention provides rubber-mixed magnetic powder and a preparation method thereof. The rubber-mixed magnetic powder comprises first magnetic powder with particle size ranging from 5 microns to 420microns, second magnetic powder with particle size ranging from 0.05 micron to 75 microns and a binder, wherein the dose and particle size of the first magnetic powder are both greater than those of the second magnetic powder. The rubber-mixed magnetic powder is prepared from the first magnetic powder and the second magnetic powder with specific particle sizes and the binder. In the preparation process, the second magnetic powder can be distributed on surfaces of the first magnetic powder or surfaces of aggregates of the first magnetic powder, so that a gap between the adjacent first magneticpowder or between the adjacent aggregates of the first magnetic powder can be filled up. By the adoption of the first magnetic powder and the second magnetic powder with the specific particle sizes, the density of a magnet can be substantially improved under the conditions of not lowering the mechanical strength of the magnet and not increasing the pressing pressure of the magnet.

The object of this invention is to improve ball reboundability (a rebound elastic function) without reducing physical properties such as mechanical strengths, compressive strengths and the like of a flexible polyurethane foam. In a method for forming a flexible polyurethane foam using a molding composition comprising an organic diisocyanate, a high molecular polyol, a catalyst, a foam stabilizer, a foaming agent using water or water and an arbitrary foaming agent, a low molecular compound having an adjacent carbon-carbon unsaturated bond and a carbonyl group is added to the composition as a modifier in 1-20wt.% based on the high molecular polyol.

The invention discloses a capacitor mounting structure, comprising a mounting plate, wherein a plurality of mounting positioning through-grooves are arranged on the mounting plate, the mounting positioning through-grooves are used for mounting capacitors, and the capacitor is detachably mounted on the mounting positioning through-grooves of the mounting plate; capacitors, wherein one sides of thecapacitors are fixedly connected with a connecting rod for connecting with the mounting plate, the connecting rod penetrates the mounting positioning through-groove and can slide along the mounting positioning through-groove; The capacitor is screwed on the mounting positioning through-groove by the connecting rod on the capacitor through the nut; and an insulating gasket sleeving the connecting rod and interposed between the capacitor and the mounting plate to increase the creepage distance between the capacitors. It does not increase the size of the mounting plate and does not reduce the mechanical strength of the mounting plate, which can improve the electrical performance of the assembly as far as possible under the limitation of the structural space.

A fishing line introduction guide (4) is disclosed, which guides a fishing line (L) from a reel (3) into an internal passage (5) of a pass-through fishing rod. The fishing line introduction guide (4) is mounted above a line introduction port (1a) connecting the inner passage (5) of the fishing rod, and includes front and rear fastening elements (10, 11), a connecting element (12), and an intermediate support portion (20). The front and rear fastening elements (10, 11) are fixed to an outer circumferential surface of the pass-through fishing rod. The connecting element (12) is formed integrally with the front and rear fastening elements (10, 11), and includes a first guide portion (15) and an intermediate support portion (20). The intermediate support portion (20) includes a second guide portion (21). The fishing line (L) extends from the reel (3), through the first guide portion (15), the second guide portion (21), and into the line introduction port (1a).

The invention relates to a tetra(0-isopropyl-phenylphosphinyl)glycoluril (TIPRPG) flame retardant composition. The flame retardant composition is prepared from tetra(0-isopropyl-phenylphosphinyl)glycoluril and any one or two or three of melamine cyanurate (MCA), melamine polyphosphate (MPP) and diethyl aluminum phosphinate (1240) through compounding according to any weight ratio and uniformly mixing, wherein the weight fraction of TIPRPG in the flame retardant composition is greater than 0. The flame retardant composition disclosed by the invention has the advantages that multiple elements are synergic, the material compatibility is good, the flame retardance is high, the flame retardant composition is halogen-free and environment-friendly, the application cost can be reduced and the like, so that the flame retardant composition can be applied to flame retardants of polyester, polyamide and the like.

The invention provides an electric brush keeping device for keeping the electric brush of a motor, comprising an electric brush keeping plate with a notch; an electric brush bracket with a substrate and a pair of wall parts projecting from the surface of the substrate, wherein the substrate is combined with the electric brush keeping plate by being embedded with the notch of the electric brush keeping plate and the surface of the substrate of the electric brush bracket and the surface of the electric brush keeping plate are on the same surface and the electric brush is inserted into the pair of the wall parts of the electric brush bracket. The height of the wall parts of the electric brush bracket is set equal to that of the electric brush inserted into the space between two wall parts and a projection part formed on the front end of the wall parts of the electric brush bracket is fastened with the angle part of the electric brush, so as to prevent the electric brush from being disengaged with the wall parts.

The invention discloses a touch display device. The touch display device comprises a display device and a touch device, wherein the touch device is arranged on the display device. The touch device comprises a cover plate, a dummy structure and a touch sensing assembly, wherein the touch sensing assembly is arranged between the cover plate and the dummy structure, and the surface of the touch sensing assembly is completely covered by the dummy structure. Compared with the known technology, under the situation that the touch device has the same mechanical strength, the cover plate is thinner than the cover plate in the known technology, so that the touch response sensitivity is good, the overall mechanical strength of the touch device is not reduced, and the touch device can be prevented from being damaged in the bonding process and / or application process.

The invention belongs to the technical field of a high-power laser, and particularly relates to a high-power wrapping layer light stripper. The high-power wrapping layer light stripper comprises a main optical fiber, a glass rod and a package shell, wherein at least one glass rod is arranged on an outer circumference of the main optical fiber along a circumferential direction, the glass rod is parallel to the main optical fiber, the package shell sleeves an outer side of the main optical fiber, and the glass rod is packaged in the package shell. The main optical fiber is connected with the glass rod, light energy transferring of a wrapping layer is achieved, light energy density of a quartz rod is reduced, the quartz rod is in contact with the package shell, the thermal processing capacityof a device is improved by the structure under the condition of no active cooling, thermal processing of CPS can be achieved, and the production cost is reduced.

The invention discloses an internal-stress-free floor producing method. The method comprises the following steps of: polishing a floor base material; trimming; cutting a rabbet; painting; forming a short through hole which passes through the whole floor on the long side edge of the floor; and forming a long through hole which passes through the whole floor on the short side edge of the floor, wherein the long through hole is vertical to the short through hole. The floor produced by the method does not generate internal stress when used for a long time, so that the conditions such as hunch-up, deformation, even cracking and the like of adjacent floors caused by mutual extrusion due to the internal stress are greatly reduced; the mechanical strength of the floor cannot be reduced due to the vertically-formed through holes, so that the floor has relatively high compression resistance; and the method has a simple process, and the floor has long service life.

The invention discloses a stretching wrapping film and a preparation method thereof, and belongs to the technical field of wrapping film production. The stretch wrapping film is composed of seven layers of materials, the first layer and the sixth layer are made of the same materials, the third layer and the fifth layer are made of the same materials, polyethylene serves as a base body of each layer of materials, the second layer is made of customized metallocene polyethylene, and meanwhile an ethylene-propylene elastomer is added into the seventh layer of materials, so that the wrapping film has higher tensile property. In addition, carbon nanotubes pretreated by a silane coupling agent can also be added into each layer, so that the anisotropy of the wrapping film is improved; an improved screw extruder is adopted in the preparation process, the length ratio of a feeding section to a compression section to a homogenizing section is changed, meanwhile, process parameters during screw extrusion and traction winding are optimized, and the finally obtained stretching wrapping film is thinner in size and more uniform in performance.