48results about How to "Extended active time" patented technology

A combined fracturing and perforating method and device for oil and gas well are disclosed. The method utilizes an explosion of a perforating charge (5) in a combined fracturing perforator to ignite primary gunpowder in the perforator, and burning of the primary gunpowder ignites secondary gunpowder in the perforator. The body of the perforating gun in the combined fracturing and perforating device is provided with pressure releasing hole (8) which is directly facing the jet direction of said perforating charge, and sealing sheet (9) is arranged on said pressure releasing hole (8). Inner gunpowder box (6), which contains the primary gunpowder, and outer gunpowder box (7), which contains the secondary gunpowder, are mounted on the cylindrical charge frame (4).

The invention discloses a moisture-permeable waterproof film used for a fabric and a fabrication process thereof. According to the invention, a primary coating comprises polyurethane resin, butanone, toluene, water, hexane diisocyanate and N-methylethanolamine, and a first and second surface coatings comprise polyurethane resin, butanone, toluene, water and N-methylethanolamine. The fabrication process comprises the following steps: mixing hexane diisocyanate with main resin; mixing water with butanone to form a solvent which is put into a main resin mixed solution in at least six steps; filtering the mixed solution with a nylon net so as to obtain a filtered main resin mixed solution and carrying out deaeration treatment so as to form a primary coating slurry; preparing a surface coating slurry with the viscosity of a conjugate solution being 3500 to 6000 mpas; coating the primary coating slurry on the surface of release paper to form the primary coating, with coated weight being 4 to 6 g / m<2>; coating the surface coating slurry on the surface of the primary coat to form the surface coatings; and drying the release paper with the surface coatings and peeling the surface coatings off the release paper. According to the invention, the disadvantages that existing hydrophilic moisture permeable processing coating fabrics have nonuniform micropores and easily swell when contacting with water are overcome, and therefore, moisture permeable performance of a fabric itself is improved.

The invention discloses an application of lauric acid modified SOD on labor protection of the dye industry and the printing and dyeing industry. A preparation method of the lauric acid modified SOD comprises the following steps that (1) activated lauric acid modifiers are compounded, wherein lauric acid and thionyl chloride are subjected to reaction at 50-140 DEG C, stable returning is performed after at least 80% of lauric acid is converted, and then cut fractions at 124-127 DEG C are collected through reduced pressure distillation, namely the activated lauric acid modifiers; and (2), the lauric acid modified SOD is prepared, wherein ox blood SOD is dissolved in a buffer solution to form an SOD solution, the activated lauric acid modifiers are added into the solution, the mixture is stirred and reacts at 30-50 DEG C and then is quenched to stop reaction, and the lauric acid modified SOD product is obtained. The prepared lauric acid modified SOD has the advantages of easily permeating through the skin and cell membranes compared with natural SOD, being long in activity preservation time and good in heat resistance when stored at normal temperature, being non-toxic and the like. The lauric acid modified SOD is suitable for being applied on labor protection and prevention of occupational dermatosis of staff in the dye industry and the printing and dyeing industry.

The invention discloses a medium-temperature moisturizing and yellowing dense hanging rod baking method for middle and upper tobacco leaves, which belongs to the technical field of three-stage dense hanging rod baking technology for flue-cured tobacco, mainly including three stages and nine steps, and the main turning of the middle and upper tobacco leaves is yellowing. In the early stage, use medium temperature to moisturize and turn yellow, keep the temperature difference between dry and wet bulbs at zero, and bake at a stable temperature for 35-50 hours. When the yellowing degree of the tobacco leaves reaches the yellow veins, slowly increase the temperature and dehumidify, so as to increase the high-quality tobacco rate of the middle and upper tobacco leaves. , orange-yellow tobacco rate and average price, improve the chemical composition coordination and sensory evaluation quality of cured tobacco leaves, improve the quality of cured tobacco leaves, increase profits, and increase the income of tobacco farmers.

The invention discloses a method for eliminating CO in a limited space through ultrasonic atomization spraying of a heme solution, and belongs to chemical absorption methods of ultrasonic atomization spraying. With the combination of an ultrasonic atomization device and a chemical absorption method, the purpose of rapidly and effectively reducing the concentration of CO in a limited space can be achieved. According to the method, a heme (He) solution which can be rapidly combined with CO is adopted, a resonant cavity is impacted by using compressed air to generate ultrasonic waves, then a mixed liquid is atomized into micro fog drop of which the diameter is less than 50[mu] u, the fog drop is suspended in air for a long time, then the contact area between the solution and the air can be increased, and the absorption efficiency of the heme solution can be ensured. By adopting the device, 400ppm of carbon monoxide can be reduced to be less than 20ppm within 20 minutes, and the concentration of the carbon monoxide can be kept less than 20ppm within 120 hours. The equipment is gentle in application condition, simple and easy to store, safe and non-toxic and capable of meeting requirements of sustainable development. In addition, the equipment is simple to operate, low in cost and light and portable and provides good support for air purification in limited spaces such as mining escape capsules, refuge chambers and subway traffic.