51results about How to "Add holes" patented technology

The invention relates to a preparation method of super absorbent resin with high return permeability resistance. The method comprises the following steps: neutralizing an acrylic acid aqueous solution by using alkali, adding a composite initiator, a crosslinking agent and a foaming agent, and performing polymerization reaction under UV light irradiation; cutting up and pelleting hydrogel after polymerization, adding a gel cutting aid in the cut-up process, drying and pulverizing to obtain primary granules of super absorbent resin; and spray-coating the surfaces of the primary granules with surface crosslinking liquid, and performing reaction at high temperature to obtain a final product of the super absorbent resin. The super absorbent resin prepared by the method has the characteristics of high absorbing rate, high absorbing speed, high water-retaining property, excellent return permeability resistance and the like.

A preparation method of a magnesium diboride-doped superconducting material comprises the following steps: respectively weighing magnesium powder and boron powder based on a mol ratio of 1:0.7-2.5; weighing a dopant based on the ratio of the total mass of the magnesium powder and the boron powder to the mass of the dopant of 1:0.01-1, wherein, the dopant is one of sorbic acid or sorbate; evenly mixing the magnesium powder, the boron powder and the dopant powder to obtain mixed powder; and sintering the mixed powder under the protection of argon atmosphere at the sintering temperature of 600 DEG C-1200 DEG C, and keeping the temperature for 0.5-12 hours, thus obtaining the superconducting material. The method has the advantages of short preparation time, low reaction temperature, high efficiency and low cost, and is especially suitable for industrialized production. The magnesium diboride superconducting material obtained by the method has obviously increased critical current density especially very high critical current density in a high magnetic field, which is beneficial to the application of the superconducting material to the high magnetic field; and the superconducting material has strong practicability.

The invention discloses a microcellular foaming polyimide based electromagnetic shielding composite material. A preparation method of the microcellular foaming polyimide based electromagnetic shielding composite material comprises the following steps: firstly, carrying out surface etching treatment on a CNT (Carbon Nanotube) by adopting a hydrothermal high-temperature and high-pressure method and using sodium hydroxide; secondly, synthesizing a polyamic acid solution by taking pyromellitic dianhydride and 4,4'-diaminodiphenyl ether as raw materials, dispersing and mixing the polyamic acid solution with the CNT after the surface etching treatment, uniformly coating the surface of the CNT with the polyamic acid solution through ball milling-stirring treatment under a room temperature, and then carrying out microcellular foaming treatment by adopting a phase separation method after solidifying a mixed solution; finally, carrying out thermal imidization, thus obtaining the electromagnetic shielding composite material. In the preparation method disclosed by the invention, the CNT after the surface etching treatment is uniformly dispersed in a polyimide material through ball milling-stirring technological treatment, and a conductive network can be favorably formed in a polyimide-based material by the CNT, so that the electromagnetic shielding effectiveness can be effectively increased.

A fastening device (1) for fastening polyurethane screening panels (6,7) to a screen (8) is made up of a composite fastener and a disc stringer support. The composite fastener is a steel bolt (2) and nut (3) with a polyurethan holding component (4) and a polyurethane cover (9) for the bolt head. The disc and stringer support is a stringer (31) serving as a joist spanning between girders of the screen frame, the stringer (31) having no flange and being narrow and deep, with discs (35) set in the top surface of the stringer at spaced apart positions, having a hole (36) in each disc for the bolt and nut and a recess (38) in the stringer underneath each disc for the nut. The bolt and nut have a toggle (14) which allows insertion into the hole in the disc and tightening the bolt and nut entirely from above the screen.

An all-suture suture anchor system includes an all-suture anchor, an inserter, and a specially designed drill. The drill is used to enlarge the hole and create a pocket under the bone surface from the pre-drilled hole. The created pocket is intended to accommodate the expansion of the anchor when deployed into the bone, generating a true mechanical interference under the bone surface. The anchor is loaded on the inserter and placed at full length vertically inside the drilled hole. While holding the inserter on top of the drilled hole, so that a feature on the inserter keeps the anchor to a desired depth below the bone surface, tension is applied to the suture limb that is connected to the bottom end of the anchor. This tensioning step causes the length of the anchor to contract vertically and the anchor is simultaneously expanded circumferentially to fill the pocket previously created by the drill. Since the pocket created by the drill is intended to contain the deployed anchor, the deployed position of the anchor is consistently predictable.

The invention relates to a method for producing an adhesive closure element made of a thermoplastic synthetic material, by means of an extruder, which is produced without the need for screens, using a tempered forming cylinder (3) coated in rubber and a pressure cylinder in the form of a tempered pressure and smoothing cylinder. According to the invention, the synthetic material of a strip of film (2) is compressed by a wide split nozzle (1) of the extruder into pin holes (4) embodied as pocket holes in a rubber layer (7) which is arranged on the tempered forming cylinder (3), said layer of rubber (7) and the pin holes being provided with a teflon covering. The pin strip (5) is guided by means of a tempered withdrawal cylinder (10) between a gap with a gap with a pression cylinder (9) heated to a temperature greater than 230° C. and covered with PTFE at a low speed of between approximately 1 m/min. and 20 m/min. Alternatively, the pin heads (11) are formed by a plasma device (13) or by a plasma are (14) produced therefrom and the strip is displaced at a speed of between 12 m/min. and 200 m/min.

The invention discloses a method for preparing a filter material cleaning agent for agricultural planting sewage treatment, and relates to the field of cleaning agents. The method comprises the following steps that (1) cotton straw powder, soybean starch and vinyl triethoxysilane are mixed to be uniform, and sintering is carried out in a nitrogen protection atmosphere furnace; (2) a modified aluminum oxide molecular sieve, activated carbon, polytetrafluoroethylene and magnesium silicate are added into the mixture, and the materials are mixed to be uniform and subjected to ball milling; (3) theprepared mixture is pressed into thin blocks through a press, sizing is carried out in a high-temperature high-pressure environment, and then a copper sulfate solution is sprayed; (4) natrii laurylissulfas, fatty alcohol-polyoxyethylene ether and sodium bicarbonate are add into the prepared mixture, and mixing, sintering, cooling and grinding are carried out; (5) the prepared mixture is dissolved in deionized water, hydrochloric acid is dropwise added until the PH value ranges from 5 to 6. The prepared cleaning agent can remove harmful matter adsorbed by a filter material, the filter material is repeatedly recycled, resources are saved, and the sewage purification cost is reduced.

A driven disc assembly is provided wherein a clutch disc has enlarged holes for connection of opposing backing plates. The backing plates have semi-pierced sections that are insertable within mounting holes of the clutch disc. The thickness of the backing plates are enlarged from their normal thickness causing a top surface of the backing plates to axially clear heads of conventional rivets. The thickness of the friction buttons on the backing plates can then be reduced to their minimal effective use thickness.

The present invention discloses an electroluminescent element implemented by a zinc oxide nanoparticle-containing organic-inorganic composite film. In the present invention, a spin-coating technology together with a phase-segregation technology is used to fabricate zinc oxide nanoparticles and an organic electrically-conductive material into a layered organic-inorganic composite film, and an electroluminescent element is fabricated with the layered structure, which can increase the probability of the electron-hole pair recombination in zinc oxide nanoparticles. Thereby, the present invention can realize a low-cost blue light-emitting element having a large emitting area and an extensive application field.

The invention discloses high-salt-tolerance high-water-absorption resin, a preparation method and applications thereof. The preparation method comprises: S1, dissolving an alkaline compound in deionized water, and adding an acrylic monomer and an acrylamide monomer solution to obtain a neutralization solution; S2, adding chitosan into an acetic acid solution, sequentially adding an initiator, n-dodecyl mercaptan, the neutralization solution, a cross-linking agent and a foaming agent, and carrying out a polymerization reaction; S3, adding ethanol to precipitate the product, carrying out suctionfiltration, carrying out vacuum drying on the obtained precipitate filter cake, and crushing to obtain resin particles; and S4, mixing the resin particles and tricalcium phosphate powder, soaking inan organic solvent dissolved with titanium dioxide, drying, and spraying with a surface cross-linking solution. According to the invention, the high-salt-tolerance high-water-absorption resin can be used for disposable paper diapers, and has advantages of high absorption rate, high liquid absorption speed, excellent water retention performance and excellent salt resistance.

The invention relates to a pipe gallery explosion venting interval measurement device and a measurement method thereof. The measurement device comprises a vacuum pump, a rotary valve, a pipe gallery, explosion venting openings, manhole covers, weights, a pressure gauge, an ignitor, a gas storage bottle, a knob valve, a pressure reducing valve, a pressure gauge and a rotary valve, wherein the vacuum pump is connected with the rotary valve, one end of the rotary valve is connected with the pipe gallery, the pipe gallery is provided with openings adopted as the explosion venting openings, the pipe gallery is also provided with the manhole covers and the weights, the manhole covers cover the explosion venting openings, the pipe gallery is further provided with the first pressure gauge and the ignitor, the gas storage bottle is provided with the rotary valve, the pressure reducing valve and the second pressure gauge sequentially, and the gas storage bottle is connected with the pipe gallery through the rotary valve. With the pipe gallery explosion venting interval measurement device and the measurement method thereof of the invention adopted, an appropriate explosion venting interval can be determined, so that requirements for the safety of explosion venting can be satisfied, and at the same time, fewer explosion venting openings are adopted, so that economical performance can be realized.

The present invention discloses a high-voltage ground line device. The high-voltage ground line device comprises a dual-ring ground terminal and an insulating rod. A lantern ring 11 is arranged at one side of the dual-ring ground terminal; and the insulating rod comprises a pickup ground line special plug which is provided with two connecting plugs, and the length of one connecting plug located at the top is longer than the length of the connecting plug located at the bottom. The insulating rod dual-plug connecting plug can control the angle of the ground line connecting plug and the line when the ground line is hooked and dismounted, workers can control the lines to be located at the lower portion of a spring clamp, the dual-ring structure can ensure that the ground line connecting plug cannot rotate, and the ground line connecting plug can be easily hanged on the lines when the insulating rod is pulled down. The structure is simple and reasonable so as to greatly satisfy the requirement of the electric power system work.

The invention relates to novel oil absorption cotton. The novel oil absorption cotton comprises a porous cotton cloth layer, a filtering layer and a graphene aerogel layer with a 3D (Three Dimensional) porous framework, which are arranged in a laminated manner, wherein the graphene aerogel layer is nitrogen-doped graphene aerogel, and the doping mass percent of nitrogen is 50 percent to 80 percent; the porous cotton cloth layer is made of super-hydrophobic/super-oleophilic polypropylene. The porous cotton cloth layer comprises a first cotton cloth layer and a second cotton cloth layer; the filtering layer comprises a first filtering layer and a second filtering layer; the first filtering layer and the second filtering layer are arranged on two opposite side faces of the graphene aerogel layer respectively; the first cotton cloth layer is arranged at one side, far away from the graphene aerogel layer, of the first filtering layer; the second cotton cloth layer is arranged at one side, far away from the graphene aerogel layer, of the second filtering layer. The novel oil absorption cotton provided by the invention can be repeatedly utilized and the oil absorption efficiency is not remarkably reduced; the novel oil absorption cotton has an ultrahigh oil absorption rate and ultrahigh oil absorption efficiency.

The invention discloses a production technology of cotton-soybean fiber-polypropylene fiber quick-to-dry fabric. The production technology comprises the steps of preparation of raw material fiber, spinning, weaving, dyeing, shaping and softening finish, and the knitted fabric is subjected to double-faced weft-knitting by body yarn, wherein the body yarn is prepared from, by weight, 20-40% of cotton fiber, 30-40% of soybean fiber and 30-50% of micro-thin polypropylene fiber; the body yarn spinning working procedure comprises microwave treatment of the cotton fiber and the soybean fiber in the raw material fiber. The microwave treatment can change the crystal structure of cellulose, therefore the moisture regain of the cotton fiber and the soybean fiber is increased, the moisture absorptionof the fabric is optimized, subsequent treatment can further increase the number of holes in the surface of the raw material fiber, the moisture drainage performance of the fabric is improved throughthe capillary effect of the holes, the absorption and diffusing efficiency of moisture on the fabric is improved, finally, the moisture absorption and moisture drainage performance of the fabric is excellent, and the cotton-soybean fiber-polypropylene fiber quick-to-dry fabric has the quick-to-dry performance and is particularly applicable to preparing summer clothes.