45results about How to "Little change in intensity" patented technology

An ion-exchanged glass article manufacturing method includes an ion-exchange step of bringing a glass article with a composition containing Li into contact with a molten salt dissolved solution containing an alkali metal element having an ionic radius larger than an ionic radius of the Li contained in the glass article, thereby ion-exchanging the Li in the glass article with the alkali metal element in the molten salt dissolved solution. At least one kind of additive selected from the group consisting of NaF, KF, K₃AlF₆, Na₂CO₃, NaHCO₃, K₂CO₃, KHCO₃, Na₂SO₄, K₂SO₄, KAl(SO₄)₂, Na₃PO₄, and K₃PO₄ is added to the molten salt dissolved solution so that the ion-exchange step is carried out while the additive is in a solid state.

The invention discloses anti-cracking steam-curing-free ultra-high-strength high-toughness concrete. The anti-cracking steam-curing-free ultra-high-strength high-toughness concrete is prepared from cement, fly ash, silica fume, a mineral activator with cementing property, gravel, river sand, steel fibers, a polymer emulsion, water and a shrinkage-reducing super-dispersing admixture, wherein the mineral activator with cementing property comprises waste prefabricated concrete set cement crystal seeds and desulfurized gypsum. By using the mineral activator with cementing property in the concrete, high-temperature steam curing and pressurized steam curing systems adopted in the ordinary ultra-high-performance concrete are eliminated; and the shrinkage-reducing super-dispersing admixture having the functions of super-dispersing cement, reducing shrinkage, decreasing viscosity and the like is adopted to enable the hydration activity of cement to give a full play so that the strength of the concretes has no obvious change after cement usage is decreased by about 10%; and meanwhile, the mineral activator and the admixture can effectively suppress the shrinkage of concrete. The concrete prepared by the preparation method is higher in strength, toughness and shrinkage resistance, low in cost and simple in preparation method and has important practical application value.

A composite material according to the present invention, is composed of SiC, SiO₂, at least one out of Al and Si, with He leak rate of 1.3×10⁻¹⁰ Pa·m³/sec or below, thereby providing a composite material, which has a higher vacuum air-tightness, an excellent thermal conductivity, an adjustable coefficient of thermal expansion, small variation in strength and higher reliability, and a method for manufacturing the composite material, and a wafer holding member including the composite material.

The invention provides a full-biodegradable plastic mulching film, a preparation method and application thereof. The full-biodegradable plastic mulching film comprises the following components in parts by weight: 100 parts of a full-biodegradable resin, 10-30 parts of an auxiliary agent, 10-60 parts of modified starch and 10-100 parts of modified calcium carbonate, wherein the full-biodegradable resin is prepared from one or more of poly (butylene succinate) (PBS), polylactic acid (PLA), polyhydroxyalkanoate (PHA), poly (butylene adipate-butylene terephthalate) (PBAT) and polypropylene carbonate (PPC). According to the biodegradable mulching film, the contradiction that crops need longer service life of the mulching film and lower thickness of the mulching film and the requirement on the lowest thickness of a polyethylene plastic mulching film can be solved, and the technical scheme of the biodegradable mulching film also has the effects of slow degradation in the early stage, strong protection capability and accelerated degradation in the later stage, so that the influence of the biodegradable mulching film on the planting of succeeding crops is reduced.

The invention provides a method for preparing phenolic resin pre-condensation polymer cross-linking agent, which takes phenol, hydroquinone, methanol, urotropine, 40% of sodium hydroxide solution and water as raw materials and comprises the following steps: introducing cooling water into a reaction kettle; adding 10-15% of phenol, 15-10% of hydroquinone and 5-10% of sodium hydroxide solution withmass concentration of 40%; starting a stirrer, opening a cooling water valve, adjusting the cooling temperature to be not higher than 50 DEG C; adding 5-10% of urotropine when the cooling temperatureis controlled below 40 DEG C, dissolving, adding 65-55% of methanol slowly when the temperature is controlled to be not higher than 50 DEG C; stirring and reacting for 20-30min after all the raw materials are added, discharging when the fact that the temperature rises without any fallout trend is observed to obtain the phenolic resin pre-condensation polymer cross-linking agent which has the advantages of simple use, low toxicity, environment protection, adjustable gelation time and temperature of jelly thereby, and good temperature tolerance.

This invention relates to a hyperbranched polymer used as polythene processing assistant and its synthesis method, specifically the Polymer composed of higher alcohol of acrylic ester and styrene and the method of atom transfer radical polymerization. The invention synthesizes the hyperbranched polymer firstly through the following formula (weight): p-CMS 1, styrene 6.84~13.68, acrylic dodecyl alcohol ester 7.88~23.64, Bpy 0.21~ 0.63, CuCl 0.065~0.196. The above components conduct evacuation, filling argon or nitrogen for more than five times, closing tightly, and response under magnetic stirring for four to twelve hours and 100~130deg.C. The product is dissolved in acetone, filtered in alumina column, precipitated in ethanol, and dried in vacuum for a few hours under 25~40deg.C to obtain the hyperbranched polymers. The melt viscosity of this invention decreases significantly corresponding to pure HDPE, and its strength change is very small showed by the tensile performance test.

The invention relates to a preparation method of a fiber-reinforced thermoplastic product. The preparation method comprises the following steps: (1) thermoplastic resin powder and reinforced fibers are mixed by a mixed dipping device; and (2) the mixture is molten through hot pressing or extrusion, and is pressed and cooled to obtain a molded product. The preparation method uses the reinforced fibers and recovered wastes, so that the raw materials are environment-friendly and low in cost, and no secondary pollution is generated; and the molded product is light in mass and high in strength, can be recycled, has wide purposes in industry, and has higher economic and social values.

This invention is technics about a special kind of alloy steel and its tube machining. The chemical components of the alloy steel are C0.06-0.10, Si0.20-0.50, Mn0.30-0.60, Cr0.80-1.20, Al0.40-0.80, Mo0.25-0.35, S<=0.015, P<=0.025, and Fe is the rest. The technics successfully solve the moist and seawater erode problems which the regular seamless steel used in heat exchanger can't deal with and prolong the equipment life-span, meanwhile it reduces manufacturing cost and saves alloy resources.

The invention discloses a steel tube with low temperature resistance and high strength and a production method thereof. The steel tube comprises the following alloy components in percentage by weight: C, 0.16-0.20; Si 0.40-0.50; Mn, 1.40-1.60; V, 0.02-0.15; Nb, 0.02-0.06; Ti, 0.02-0.025; Cr, not more than 0.20; Ni, not more than 0.20; P, not more than 0.025; S, not more than 0.015; Mo, not more than 0.10; and the balance of Fe. The components are used as raw materials and subject to steel bloom, perforation, tube rolling and hot sizing to obtain sulphur-resistant oil well pipes, wherein the heating temperature in the perforation working procedure is 1,100-1,300 DEG C and the heating time is 55 minutes; and in the hot sizing working procedure, steel tubes the steel outlet temperature of which is above 800 DEG C are ensured to be subject to air cooling. The invention solves the problems that No. 20 seamless steel tubes have low strength and 16Mn No.20 seamless steel tubes have low low-temperature and poor weather resistance.

The rolling and hot melting process of producing integral plastic draining belt for reinforcing soft foundation includes the following steps: extruding stoved and mixed core material in an extruder to form plate; rolling and setting the plate in a core plate rolling and setting apparatus to form draining channel filter element with toothed ribs; combining the core plate and filtering cloth in a drawing apparatus; hot melting to compound the core plate and filtering cloth in a hot rolling apparatus to form one integral; cutting into required width and marking length size in a cutting and printing apparatus; and winding onto roll. The present invention has high integral structure strength, environment friendship, high acid and alkali corrosion resistance, excellent long term work state and other advantages.

The invention relates to the technical field of non-woven clothes, in particular to an environmentally-friendly superfine fiber non-woven facial mask cloth and a making method thereof. Sea-island typeand splitting type super-thin short fibers are mixed according to a proportion, carded and laid into a fiber net with a uniform gram weight, a matched non-woven spunlaced composite strengthening technology is used for forming a composite spunlaced non-woven cloth, and the non-woven cloth is used for making the environmentally-friendly superfine fiber non-woven facial mask cloth according to a tension-free fiber splitting technology. The environmentally-friendly superfine fiber non-woven facial mask cloth has the advantage of being well attached and being skin-friendly.

The invention relates to a combined type quartz crucible for the monocrystalline silicon growth and a preparation method thereof. The combined type quartz crucible comprises an outer crucible body ofthe crucible and an inner cylinder body of the crucible, wherein the outer crucible body of the crucible comprises an outer cylinder part and a crucible bottom, and the inner cylinder body of the crucible is composed of a carbon fiber sintering cylinder and a quartz sintering material arranged around the carbon fiber sintering cylinder. The quartz sintering material is an integrated piece formed by sintering quartz powder covering the carbon fiber sintering cylinder. The carbon fiber sintering cylinder is tubular fabric vertically penetrating therethrough and formed by weaving and sintering acarbon fiber. When the quartz crucible is in use, the inner cylinder body of the crucible is arranged in the outer crucible body of the crucible, and the outer crucible body of the crucible is dividedinto inner and outer areas of a crystal growing area and feeding and melting area. The combined type quartz crucible for the monocrystalline silicon growth and the preparation method thereof have theadvantages that the structure is simple, impurities can be separated, it can be achieved that feeding, material melting, crystal growing and impurity separation are carried out simultaneously, and the continuous working time is long under the high-temperature environment.

The invention relates to model test foundation soil and a preparation method thereof, and belongs to the field of building and civil engineering. The model test foundation soil consists of powdered bentonite and glycerinum. The preparation method comprises the following steps of determining a mass ratio of bentonite to glycerinum needed by a model test through vane shear tests, uniformly and adequately mixing the bentonite and the glycerinum by utilizing a kneading civil engineering stirrer according to the acquired mass ratio so as to obtain a mixture, compacting the mixture by utilizing a drop hammer, and enabling the glycerinum to be adequately filled in gaps among bentonite particles. The foundation soil not only has the physical and mechanical properties similar to naturally formed soil, but also relatively stable in character; compared with the naturally formed soil, when the foundation soil achieves the steady non-water-discharging shear strength, the consumed time is relatively short, and the test time is reduced; the foundation soil does not need to be solidified in the test, has no volatility and can be reused, the waste of test materials can be avoided, the strength of the foundation soil before and after the model test is slightly varied, and the problem that the strength is improved due to excessively fast water discharging in the model test process can be avoided. The production process is simple, the simplicity and the easiness in implementation can be achieved, and the applicability is wide.

A high-toughness double-component epoxy structural adhesive comprises a component A and a component B which are mutually independent, the component A comprises 30-70 wt% of epoxy resin, 10-20 wt% of an active diluent, 0-15 wt% of an active toughening agent, 10-30 wt% of a filler and 1-5 wt% of an auxiliary agent, and the component B comprises 60-90 wt% of a curing agent, 3-10 wt% of an active toughening agent, 1-5 wt% of a coupling agent, 1-8 wt% of an auxiliary agent and 10-20 wt% of a filler. The component A and the component B are mixed according to the volume ratio of 1: (0.8-1.2) to obtain the high-toughness double-component epoxy structural adhesive. The component A and the component B of the structural adhesive are long in independent storage period, after the component A and the component B are mixed, the curing rate is low, heat release is stable, volume shrinkage is small, formed colloid defects are few, the epoxy structural adhesive obtained through mixing is quite excellent in toughness, T peel strength, impact peel strength and lap joint shear strength for metal bonding, and after curing, a sea island structure is formed, so that the structural adhesive has excellent impact resistance.

The invention discloses a magnetic suspension device which comprises a base module, a suspension module and a control module. The base module comprises a first magnet which is magnetized in the radial direction. The suspension module comprises a second magnet which is axially magnetized; the inner side of the first magnet shows a first magnetic polarity, the outer side of the first magnet shows a second magnetic polarity, and the first magnetic polarity is opposite to the second magnetic polarity; the upper surface of the second magnet shows a third magnetic polarity, the lower surface of the second magnet shows a fourth magnetic polarity, and the third magnetic polarity is opposite to the fourth magnetic polarity; the suspension module can suspend above the base module; and the control module is used for keeping the suspension module to suspend stably. The invention has the advantages of strong suspension force, good suspension stability and the like.