195results about How to "Low flexural strength" patented technology

An engine hood for motor vehicles possesses a deformable head impact zone for the protection of pedestrians in the event of a collision with the motor vehicle. The engine hood is composed of two or more load-bearing shells and has a flexural strength profile which is low adjacent the edges and increases continuously toward the middle of the hood. At the same time, the engine hood has a uniform mass distribution ovcr the entire surface. Consequently, irrespective of the position the engine hood, the same characteristic for the head impact is achieved everywhere. The advantageous embodiment of the engine hood provides a reinforcing panel with regularly arranged beads, at most three beads forming a junction point so as to reduce local rigidities.

A package (25) for wiper blades (10) features a folded box (26) as well as an insert (32). In order to prevent the wiper blades (10) from abruptly relaxing during removal from the box (26), the insert (32) is embodied of a material whose flexural strength in the curvature direction of the wiper blades (10) is less than that of the wiper blades (10) so that when pulling the insert (32) out of the folded box (26), the wiper blades (10) continuously bend from their extended state in the folded box (26) into their curved shape in an unstressed state.

The invention discloses a road base reinforcing high-polymer loading and grouting method. Aiming at semi-rigid road surface with an incompact base, and flexible base road surface, additional load is applied to the road surface by a loading device, an expansive force of the reacted high-polymer material is prevented from supporting the road surface; and by injecting the high-polymer material into the base, the volume of the reacted material rapidly expands, and the incompact base is solidified so as to fulfill the aim of reinforcing the base. The method has the characteristics of good treatment effect, rapid construction, no curing need, high pertinence, high controllability, fund conservation and the like; and compared with the conventional maintenance method, the method is obviously innovative in technical principle, construction method and other aspects. The unique road base reinforcing method can save a lot of funds and construction period, avoids bad social impact due to long-term traffic closure, and contributes to protecting environment and saving resources.

The speaker has a diaphragm main body 30 supported resiliently on a frame 23 via an edge portion 31 around its outer circumference, and the groove ribs 35 integrally formed in the edge portion 31, wherein a regulation member 37 for partially improving a flexural strength of the edge portion 31 is provided on a part of the front or back face of the edge portion 31.

A self-repairing concrete includes urea-formaldehyde resin polymer micro-capsules, in which the urea-formaldehyde resin polymer micro-capsules are mixed for a fixed function of micro-cracks. The quality mixture ratio is: concrete/micro capsules/water=100:1-15:15-50. The manufacturing method is weighing a full amount of water in a container, adding urea-formaldehyde resin polymer micro-capsules, stirring, until fully dispersed microcapsules; pouring the water into the mixing container, adding the corresponding quality of cement; stirring; adding sand and gravel filling materials, conducting worksite watering, ⅓ volume for each time, vibrating, and air exhausting; until the paste filling mold.

The invention discloses a thermal insulating decorative ceramic plate produced by comprehensive utilization of perlite waste and a production method thereof. A matrix formula consists of: 25%-100% of perlite micropowder, 20%-80% of expanded perlite micropowder, 2%-25% of Guangdong black mud, 0%-10% of limestone, 0.1%-5% of fluorite, 0.1%-2% of black silicon carbide, 0.5%-15% of bentonite, 0.1%-5% of sodium metasilicate nonahydrate, 0.1%-0.5% of sodium humate, and 0.1%-1.0% of sodium tripolyphosphate. A glaze formula consists of: 50-90% of expanded perlite powder, 50-90% of low temperature frit, 0.1-5% of zinc oxide, 0.1-5% of fluorite, 0-5% of apatite, 0.1-2.0% of sodium tripolyphosphate, 0.5-5% of kaolin, and 0.1-0.5% of sodium methyl cellulose. The production method is characterized by naked firing in a roller kiln at a low temperature of 900DEG C-1050DEG C. After firing, the thermal insulating decorative ceramic plate with a water absorption rate of less than 0.5%, a volume density of less than 500kg/m<3>, a rupture modulus of greater than 3.5Mpa, a thermal conductivity coefficient of less than 0.08/W/(m.k), and a combustion level of A can be obtained.

A carbon fiber tow composed of many carbon filaments and having a strand tensile strength of 3.8 to 5.5 GPa, a strand tensile modulus of 180 to 220 GPa and a carbon crystal size (Lc) of 13 to 18 Å. This carbon fiber tow can be produced by subjecting a precursor fiber tow composed of many polyacrylonitrile filaments which have a lightness difference (ΔL) of 50 or below and fineness of 1.1 to 1.7 dtex to oxidative stabilization and subjecting the stabilized fiber tow to carbonization with the maximum temperature within the range of 1,100 to 1,300° C. in an inert atmosphere while raising the temperature from 1,000° C. to the maximum temperature at a temperature rise rate of 100 to 2,000° C./min.

A composite ceramic of the present invention includes granular alumina particles (A) having an aspect ratio of 3 or less, granular zirconia particles (B) having an aspect ratio of 3 or less, and a columnar crystal (C) having an aspect ratio of 3 or more, the columnar crystal including a complex metal oxide containing an alkaline-earth metal element and aluminum element. The composite ceramic has high flexural strength, toughness, and hardness, and achieves excellent hot-water resistance and high flexural strength after hydrothermal degradation resistance test.

The invention discloses high polymer grouting technology for treating a tunnel void and a construction method thereof. The technology comprises the following steps of: detecting the tunnel void on the basis of a ground penetrating radar (GPR) or a falling weight deflectometer (FWD); and injecting a high polymer material to a void part according to the condition of the tunnel void, wherein after the material reacts, the volume is expanded quickly and the material is cured to quickly fill the void. The technology has the characteristics of good treatment effect, quick construction, no requirement on curing, obvious target, high controllability, cost conservation and the like. Compared with the traditional tunnel void treating method, the technology is innovative obviously in the aspects of technical principle and construction method and develops a new, quick, economical and practical way for maintaining a tunnel and enabling the tunnel to be durable.

The invention discloses a new road regenerating cement concrete and preparing method, which comprises the following parts: 15%-37% regenerating rough aggregate, 15%- 37% natural rough aggregate, 16%-18% cement, 22%-24% sand, 8%-10% water (mixing water and additional water), 0.6%-1.2% steel fiber corresponding to the sum of component bulk and 0.1%-0.5% high-effect water reducer corresponding to cement quantity. The invention overcomes low bending-proof strength, which improves cracking-proof flexibility and impaction-proof ability greatly.

The invention discloses a method for preparing a geopolymer and organic macromolecule composite gelled material. In the method, slag or fly ash capable of providing geopolymer components and styrene/butyl acrylate copolymer emulsion are utilized to produce a slag or fly ash geopolymer and organic macromolecule composite gelled material under the action of silicate excitants; wherein the amount of styrene/butyl acrylate copolymer emulsion is 5-25 percent of the weight of phosphatic slag or slag, and the amount of the alkali excitant sodium silicate is 20-22 percent of the weight of the phosphatic slag or slag; and the flexural strength of the geopolymer polymer and organic macromolecule composite is superior to the inorganic aluminosilicate polymer in 28-day age, and the 28-day maximum flexural strength is 1.76 times of that of the inorganic aluminosilicate polymer. The preparation process has no discharge of waste water, waste gas and waste slag, does not need heating, is green, environment-friendly and energy-saving, reduces the consumption, and is one effective approach for large-scale resource utilization of industrial solid wastes.

The invention relates to a reinforced cement foaming board and a preparation method thereof. The reinforced cement foaming board comprises the following components in percentage by weight: 27.00-35.50% of water, 28.0-61.0% of Portland cement, 0-32.70% of coal ash at grade I or a mixture of coal ash and recycled filler, 0-2.00% of wollastonite powder, 0.10-0.30% of fiber, 0.37-0.65% of ammonium stearate, 1.00-2.00% of a mixture of 10 parts of calcium sulphate and 1 part of calcium formate, 0.10-0.20% of naphthalenesulfonate formaldehyde condensation compound, 0.90-1.20% of hydrogen peroxide and reinforcement net. The reinforced cement foaming board provided by the invention has the advantages of low apparent density, low heat conductivity coefficient, good noise reduction effect, high strength, no crack and shock resistance.

A multi-terminal monolithic ceramic capacitor arranged to reduce an equivalent series inductance and having an array structure is provided. A first same-polarity-connection conductor and a second same-polarity-connection conductor are provided inside a capacitor body so as to extend over at least two capacitors. The first same-polarity-connection conductor is electrically connected to a plurality of first external terminal electrodes, and the second same-polarity-connection conductor is connected to a plurality of second external terminal electrodes. In the monolithic ceramic capacitor which is mounted on a wiring substrate, the overall capacitance can be maintained even if an accident, such as cracking of a solder joint, occurs in one of the external terminal electrodes.

The invention discloses a method for preparing an inorganic aluminosilicate polymer and organic macromolecule composite gelled material. In the method, phosphatic slag or slag capable of providing inorganic aluminosilicate components and styrene/methacrylate copolymer emulsion are utilized to produce phosphatic slag or slag inorganic aluminosilicate polyer and organic macromolecule composite gelled material under the action of sodium silicate excitants; wherein the amount of the styrene/methacrylate copolymer emulsion is 5-25 percent of the weight of the phosphatic slag or slag, and the amount of the alkali excitant sodium silicate is 13 percent of the weight of the phosphatic slag or slag; and the flexural strength of the inorganic aluminosilicate polymer and organic macromolecule composite is superior to the inorganic aluminosilicate polymer in 28-day age, and the 28-day maximum flexural strength is 2.08 times of that of the inorganic aluminosilicate polymer. The preparation process has no discharge of waste water, waste gas and waste slag, does not need heating, is green, environment-friendly and energy-saving, reduces the consumption, and is one effective approach for large-scale resource utilization of industrial solid wastes.

The invention discloses a black high-strength microcrystal glass, which comprises the following parts: 70% SiO2, 3. 5% Lithia, 17% alumina, 0.1%-0.5% ferric trioxide, 0.5%- 1% cobalt trioxide, 0.5%-1% nickel trioxide, 3. 1% -3. 5% at least one of titania, zirconia and phosphorus pentoxide, 1%-1. 5% at least one of magnesia, zinc oxide, barium oxide and boric oxide, 2. 0%-2. 1% potassium oxide and or sodium oxide and 1% arsenic oxide and or antimony oxide. The making method of microcrystal glass comprises the following steps: grinding evenly; adding reducer to allocate composite material; fusing under 1580 -1650 deg. c; shaping; annealing; coring under 600-800 deg. c for 1-4h; heating to 700-1000 deg. c to crystallize for 1-12h.

The invention discloses high bending force resistant permanent magnet materials and a preparation method thereof. The magnet materials comprise, by weight, 22-30% neodymium, 4.4-6% praseodymium, 0.044-0.06% lanthanum, 2-5% boron, 0.044-0.06% molybdenum, 0.044-0.06% nickel, 0.044-0.06% rhenium, 0.044-0.06% scandium and the balance ferrum. The high bending force resistant permanent magnet materials are uniform in organization, strong in structure and capable of improving bending force resistant performance of the materials and magnetic performance. The preparation method of the magnet material takes full use of praseodymium-neodymium waste to directly produce raw materials used by alloy, composition proportion is flexible, quality is well controlled, cost is lowered, the process is simple and powder waste with high oxygen content is fully used.

The invention is directed to a method for splitting a flat ceramic workpiece through provocation of a separation crack due to stresses occurring as a result of temporal and local application of heat by means of laser along a desired splitting line and, following this, a temporal and local removal of heat by means of a coolant, wherein the beam spot length is calculated from the following formula l=8×d×24/WLF, where l is the length of the beam spot, WLF is the thermal conductivity of the ceramic to be split, and d is the thickness of the ceramic to be split, so that the length of the beam spot generated on the workpiece by the laser is selected depending upon the thermal conductivity of the ceramic and upon the thickness of the workpiece. Particularly with workpieces with high internal stress, process parameters such as the laser power or the forward feed speed are changed over the course of the process in order to influence the magnitude of the induced thermal stresses.

The present invention provides an improved roofing tile and roofing tile system that simulates the appearance of wood shake and has an improved strength to weight ratio. One embodiment of the roofing tile system includes two unique tile profiles, an “A” profile and a “B” profile, wherein tiles having an “A” profile are alternately or randomly installed adjacent tiles having a “B” profile to simulate the appearance of wood shakes. In addition, each roofing tile is formed of a clay material and includes ribs that extend normally from a lower face of the tile, which improves the strength to weight ratio of each tile. Furthermore, each tile includes touch points that extend from the a face of the tile to engage receiving portions on a tile positioned vertically adjacent to the tile, which prevents the tiles from moving relative to each other.