50results about How to "Reserve length" patented technology

The invention belongs to the technical field of tobacco sheet manufacturing, and discloses a method for manufacturing tobacco sheets with a paper-making process and the tobacco sheets manufactured with the method. The method includes the steps that repulping processing is carried out on washed tobacco stems, washed tobacco powder and washed outer-fiber macrofiber pulp boards, and fiber stuff obtained after repulping processing is mixed and extracted; the concentration of a solid-phase mixture obtained after extraction is gradually reduced under the medium concentration conditions, and five-section soft defibrination processing is carried out to obtain materials used for manufacturing tobacco sheet base sheets; and then the paper-making process is adopted for manufacturing the tobacco sheet base sheets. According to the method and the tobacco sheets, the tobacco stems, the tobacco powder and the fiber stuff are mixed, and the protecting effect of large fibers on small fibers is adopted, so that the cutting effect and the damage effect on the fine tobacco powder in the defibrination process are reduced; the length of the fibers is better kept; the retention rate of the tobacco powder and packing is improved; the porosity of the tobacco sheets is improved; the physical performance of the tobacco sheets is improved; and the quality stability of the tobacco sheets is guaranteed.

The invention discloses a method for producing latex paper by using a circular-net multi-cylinder paper machine. 50 to 60 percent of bleached sulfate soft wood pulp, 35 to 45 percent of non-bleached sulfate soft wood pulp and 5 percent of manmade fiber are adopted, and the following technology is used at the same time so as to make the product better: defibrinating by using a previous-low-concentration fiberizer and a rear-middle-concentration fiberizer so that the beating degree is higher and the length of the fiber can be retained to the maximum extent, and the body paper has higher tensilestrength and flexibility and is hard to break during use; besides the two different soft wood pulps, a certain amount of manmade fiber is added into the fiber raw material, so that the strength and the anti-abrasion performance of latex paper are enhanced; the body paper subjected to dipping treatment according to an optimized latex formula has higher strength and water, oil and high temperature resistance performance; a specific surface coating and back coating mode is performed on the dipped body paper, so the tensile strength, the bending resistance and the liquid resistance of the finished paper are enhanced; meanwhile, the latex paper is softer and durable, and higher in the surface strength.

The invention discloses an oil and gas well fracturing construction method. The oil and gas well fracturing construction method adopts a biological junction perforation plugging technology for operation. According to the fracturing construction technology, a biological junction is used for replacing the segmented temporary plugging effect of a bridge plug, the biological junction perforation plugging technology can solve the construction of a casing deformation section and can also be used in a normal whole well section, and meanwhile, the biological junction can also be used for steering in the fracturing process. The environment-friendly biological junction segmented temporary plugging technology is adopted, the bridge plug construction risk is reduced, a reservoir is uniformly fractured, segmented fracturing can be carried out on a casing deformation section, and the influence of casing deformation on the yield of a well is reduced.

The invention provides a method for preparing high-strength corrugated base paper, comprising: mixing 30-50 parts by weight of national waste paper, 10-30 parts by weight of Japanese OCC waste paper, and 40-60 parts by weight of European waste OCC and / or British OCC waste paper mixed pulping to obtain OCC waste paper mixed pulp; the national waste paper is grade A and / or B grade; the OCC waste paper mixed pulp is mixed with broke pulp, after slag removal, Papermaking and sizing are carried out to obtain high-strength corrugated base paper; the mass ratio of the mixed OCC waste paper to broke pulp is (80-90): (10-20). Compared with the prior art, the present invention uses Japanese OCC waste paper, European OCC waste paper and British OCC waste paper as raw materials. These waste papers are paper produced from primary wood pulp, and the fiber length and strength are retained. The fibers in the waste paper pulp are miscellaneous. The content of cells and impurities is low, which is beneficial to avoid shrinkage of fiber paper and improve the bonding strength of paper.

The invention belongs to the technical field of tobacco sheet manufacturing, and discloses a method for processing materials for manufacturing tobacco sheets with tobacco waste and the tobacco sheets manufactured with the method. The method includes the steps that after a mixture of tobacco stems and tobacco powder is extracted, the concentration is gradually lowered under the medium concentration condition; multistage soft defibrination processing is carried out; smashing and defibrination are carried out on materials obtained through defibrination processing and outer-fiber long-fiber stuff; and obtained slurry is evenly mixed to obtain materials used for manufacturing tobacco sheet base sheets. According to the method, gradual, sufficient and even mixing and defibering are carried out on the solid-phase mixture of the tobacco stems and the tobacco powder in the multistage soft defibrination processing process; moderate thin fibrillation is generated; the cutting effect and the damage effect on the materials in the defibrination process are reduced; the high thin fibrillation degree of the outer-fiber long-fiber stuff is obtained under the high pulping strength; the adsorption effect and the cross linking effect on thin components in the materials are facilitated; the retention rate of the tobacco powder and packing on a net is improved; the yield is improved; and the porosity and the physical performance of the tobacco sheet are improved.

The invention discloses extrusion equipment for fusion and granulation of recovered glass fiber-reinforced plastic. According to the technical scheme, the extrusion equipment for fusion and granulation of recovered glass fiber-reinforced plastic comprises a double-screw extruder and a single-screw extruder which are connected in sequence; the double-screw extruder comprises a first-order cylinder with a heating function, a first-order feeding port used for feeding is formed in the front portion of the first-order cylinder, a filter screen is arranged on the rear portion of the first-order cylinder and used for filtering fused polymers, and a mixing unit is further arranged in the position, close to the filter screen, of the interior of the first-order cylinder; and the single-screw extruder comprises a second-order cylinder with a heating function, a second-order feeding port is formed in the front portion of the second-order cylinder and used for collecting short glass fibers and the polymers filtered by the filter screen, an extruder head is arranged on the rear portion of the second-order cylinder, and an ultrasonic vibration mechanism used for promoting the glass fibers and the polymers to be mixed is arranged on the extruder head. According to the extrusion equipment for fusion and granulation of recovered glass fiber-reinforced plastic, the cut short glass fibers are effectively protected, and the physical index of products is effectively increased.