80results about How to "Plenty of time to operate" patented technology

This invention presents a noise cancellation device for improved personal face-to-face and radio communications in high noise environments. The device comprises speech acquisition components, an audio signal processing module, a loudspeaker, and a radio interface. With the noise cancellation device, the signal-to-noise ratio can be improved by as much as 30 dB.

The invention relates to polyaspartic ester resin and in particular relates to water-dispersible polyaspartic ester resin, a preparation method of waterborne polyurea coating and application. Water-dispersible polyaspartic ester is obtained by carrying out Michael addition reaction on unsaturated binary carboxylate, unsaturated monocarboxylic acid and a primary amino compound under the action of acatalyst and a neutralizing agent; a coating film of the double-component waterborne polyurea coating is obtained by utilizing a water dispersion body of the water-dispersible polyaspartic ester; theperformance keeps main properties of solvent type polyurea coating, such as rapid curing at room temperature, high glossiness, high transparency, good water resistance, corrosion resistance, ultraviolet resistance and ageing resistance.

The purpose of this invention is to dispose of and effectively utilize waste of the skin of a bamboo shoot, young bamboo and parent bamboo by using one or both of the skin of the bamboo which is waste in a boiling work plant of the bamboo shoot and the young bamboo which is a grown bamboo shoot as main components, adding the parent bamboo therein and composting the raw materials for a short time at a low cost. The subject fermented fertilizer is produced by adding useful microorganisms containing one or more kinds of actinomyces, photosynthetic bacteria, fungi, lactobacilli, yeast and aspergillus bacteria into the composting raw material mainly using one or both of the skin of the bamboo shoot and the young bamboo, and if need, the parent bamboo, further adding at least one of a fermentation accelerating assistant, a water control agent and a nutritious agent of the microorganisms if needed and mixing and stirring them. The fermented fertilizer containing a growth promotor contained in the bamboo shoot or the young bamboo is produced by composting the skin of the bamboo shoot or the young bamboo used as the main components and becomes the fertilizer remarkably effective for the growth promotion of plants.

Provided is a cement admixture which gives cured cement concrete that imparts excellent non-corrodible properties to the reinforcing bars present therein, has resistance to external infiltration of chloride ions, and can be inhibited from becoming porous because Ca-ion eluviation occurs little and that has self-healing ability. Also provided is a cement composition. The cement admixture is characterized by comprising a calcium ferroaluminate compound which is based on CaO, Al2O3, and Fe2O3, has a Fe2O3 content of 0.5-15 mass%, and has a CaO2Al2O3 structure, the CaO/Al2O3 ratio being in the range of 0.15-0.7 by mole. It is preferred that the admixture have a degree of fineness of 2,000-7,000 cm2/g in terms of Blaine specific surface area and that a latent hydraulic substance and/or a pozzolanic substance (pozzolanic substance and the like) be used in combination with the calcium ferroaluminate compound. The pozzolanic substance and the like preferably comprise one or more substances selected from a group consisting of ground granulated blast furnace slag, fly ash, silica fume, metakaolin, incineration ash of pulp sludge, incineration ash of sewage sludge, and waste glass powder. It is preferred that the ratio of the calcium ferroaluminate compound to the pozzolanic substance and the like be from 10/1 to 1/10 by mass. The cement composition comprises cement and the cement admixture.

The invention relates to a slow gel flexible polyurethane foam composition which comprises a component A and a component B with a weight ratio of 1:1, wherein the component A comprises the ingredients in percent by weight of 52.5-69.8 percent of polypropylene oxide ether polyol with a functionality degree of 2 or 3 and a number-average molecular weight of 1000-6000, 25-34 percent of aromatic hydrocarbon compound, 5-13 percent of aromatic diamine hardener, 0.05-0.2 percent of catalyst and 0.15-3 percent of water, and the ingredients are mixed and stirred uniformly to form a polymer; and the component B comprises the ingredients of 50-60 percent of polyether polyol, 15-28 percent of diisocyanate and 16-25 percent of plasticizer, and the ingredients react for 2-3h at a temperature of 70-90 DEG C to obtain a prepolymer with isocyanate with a mass content of 4.4-10 percent. When a flexible polyurethane foam material is prepared, the slow gel flexible polyurethane foam composition can generate a better foam homogenizing effect without using a silicone oil foam stabilizer; and the slow gel flexible polyurethane foam composition is long in gelation time, and ensures that enough operation time is provided when a complex product is produced.

The invention provides a cement-free desulfurized gypsum plastering mortar and a preparation method thereof. The cement-free desulfurized gypsum plastering mortar comprises the following components in parts by weight: 15-20 parts of desulfurized gypsum, 15-20 parts of silicon-calcium slag composite admixture, 60-70 parts of aggregate, 0.2-0.3 part of additive and 10-15 parts of water. The silicon-calcium slag composite admixture is composed of the following components in parts by weight: 40-50 parts of silicon-calcium slag, 1-5 parts of desulfurized gypsum, 30-35 parts of fly ash, 15-25 parts of granulated blast-furnace cinder and 0.05-0.08 part of grinding aid. The cement-free desulfurized gypsum plastering mortar is free of any cement and directly adopts the desulfurized gypsum, silicon-calcium slag and other industrial solid wastes as the basic components, so that the prepared cement-free desulfurized gypsum plastering mortar can satisfy requirements in related standards, and does not need to perform drying, calcination, milling and other processes on the desulfurized gypsum, thereby lowering the energy consumption and pollution in the desulfurized gypsum plastering mortar working process.

The invention provides a method for preparing a phenolic aerogel by normal pressure drying. The method comprises the following steps: preparing a graft reaction solution including a phenolic novolac resin, a silane grafting agent and a first organic solvent, and carrying out a grafting reaction the phenolic novolac resin and the silane grafting agent in the graft reaction solution to obtain a silane-grafted phenolic resin; adding a curing agent and a second organic solvent to form a curing reaction solution, and performing a curing reaction to obtain a phenolic gel; and drying the phenolic gelunder normal pressure to obtain the phenolic aerogel. The invention also provides the phenolic aerogel produced by the method. The method of the invention realizes normal pressure drying, greatly shortens the preparation cycle, reduces the preparation cost, solves the problems of microscopic phase separation and too fast gelling, and leaves sufficient operation time for practical application. Theprepared phenolic aerogel has a significantly improved framework strength, a remarkably reduced shrinkage, good oxidation resistance and good ablation resistance.

The invention relates to a multifunctional concentrated material used for preparing a kitchen and bath cement-based waterproof material. The multifunctional concentrated material is composed of waste rubber powder, a silane coupling agent, alcohol blend, high-alumina cement, redispersible latex powder, cellulose ether, a delayed coagulant, a coagulation accelerator, a water reducer, an anti-freezing agent (added in winter), and a water repellent, and is a one-component material. The cement-based waterproof material is prepared by mixing the multifunctional concentrated material with cement and quartz powder; is used for kitchen and bath waterproof construction; possesses both excellent characteristics of waterproofing coatings and waterproof mortars, and excellent waterproof performance, so that waterproof effect can be achieved just by a thin coating layer in construction; and also possesses excellent rigidity which is convenient for paving of tiling in following procedures, and is suitable for waterproofing of waterward sides and water lee sides. Addition of waste rubber powder is capable of reducing density of the polymer cement waterproof material, increasing spreading rate of waterproof coatings, changing waste into valuables, and realizing recycling of resources.

Methods and apparatus for preparing at least a hemispherical surface with a desired dimension have been disclosed. The method includes at least two steps: a primary cutting mode for mostly reaming a lower portion of the target site, which enveloped area from the pole to intermediate latitude and a finishing cutting mode for reaming either an upper portion or an entire area of the site by less number of times of rotation, respectively. The intermediate latitude locates between the pole and the equator of hemisphere.

The invention discloses sealing slurry for a low-temperature environment as well as a preparation method and an application of the sealing slurry. The sealing slurry comprises: 30-50 parts of cement,0-10 parts of a mineral admixture; 0-15 parts of early strength component, 40-60 parts of aggregate, 0-0.1 part of a water reducing agent, 0.01-0.03 part of a plastic expanding agent, 0.1 part of a defoaming agent, 0-1 part of a corrosion inhibitor, 0.003-0.2 part of a water retaining agent, 0.01-0.05 part of an air entraining agent, 0-0.4 part of retarder and 0-0.05 part of coagulant. All the rawmaterials are uniformly mixed according to the proportion to obtain the product. The sealing slurry can be used after being uniformly stirred with water according to a water-ash weight ratio of 0.13-0.15. The sealing slurry disclosed by the invention has the advantages that 1) the plasticity and the softness are excellent; and 2) the adhesive has good adhesive property at low temperature; 3) low-temperature expansion performance is good; 4) good negative-temperature hydration hardening characteristic is good, the product is suitable for sealing the bottom of a component in an environment of-10 DEG C or above and sealing seams around a communicating cavity, and solving the problem of slurry sealing construction at the temperature of 5 DEG C or below, especially 0 DEG C; 5) after mixing, the operation time is 20 minutes, and 6) no chlorine salt and other early-strength components having a corrosion effect on reinforcing steel bars or sleeves are contained.

The invention relates to novel early-strength and quick-drying tile adhesive concentrate.The tile adhesive concentrate at least comprises, by weight, 500-800 parts of sulphoaluminate cement clinker, 200-500 parts of high-strength gypsum, 1-100 parts of early strength agent, 40-120 parts of dispersible latex powder, 1-10 parts of retarder, 1-40 parts of water reducer and 5-20 parts of cellulose ether.The novel early-strength and quick-drying tile adhesive concentrate has the advantages that the sulphoaluminate cement clinker and Portland cement are used as the composite cement base materials, the composite cement base materials are coordinated with the additives such as the early strength agent and retarder, tile glue coagulation time is regulated, sufficient operation time is guaranteed, early strength and quick drying are achieved, the next joint filling can be performed immediately after tile adhering, construction time can be shortened, and the construction period can be shortened.

Disclosed herein is a shutter drive unit, including: at least one inductor; first and second drive paths; first and second shutter including first and second drive object capacitive loads, respectively; first and second clamping circuits adapted to clamp the first and second drive object capacitive loads either to a power source potential or to a reference potential through the first and second drive paths, respectively; a first switch adapted to switch connection and non-connection between the inductor and the first drive object capacitive load over to each other; a second switch adapted to switch connection and non-connection between the inductor and the second drive object capacitive load over to each other; and a power collecting portion having a function of applying an intermediate voltage between the power source potential and the reference potential to the inductor, and a power collecting function of collecting a power by the inductor.

The invention provides a feeding device in a steel processing device, belonging to the mechanical technical field. The feeding device solves the problems that the existing steel processing device discontinuously loads materials, has low processing efficiency and the like. The feeding device in the steel processing device is characterized in that the steel processing device comprises a frame, a conveying mechanism which is arranged on the frame and can convey steel to be processed, the feeding device is arranged in a feeding part of the conveying mechanism, a feeding bracket is arranged above the conveying mechanism, a platy material carrying part for putting the steel to be processed is arranged in the feeding bracket and moves back and forth along the horizontal direction, and a blockingpart which blocks the steel to be processed and brings down the steel to be processed is arranged above the material carrying part. The feeding device has the advantages of simple and safe operation,high processing efficiency, small occupied area, low manufacture cost and the like.