39results about How to "Fully solidified" patented technology

The invention relates to a production technology of viscose extinction monofilament. The production technology takes cellulosic fiber pulp as a raw material and obtains viscose extinction monofilament through preparation of a spinning solution, injection before spinning, spinning and aftertreatment, and specifically comprises the following steps of: (A) preparing the spinning solution from the cellulosic fiber pulp through steeping, ageing, yellowing, dissolving, defoaming and filtering; (B) adding a titanium dioxide solution into the spinning solution so that the weight ratio of titanium dioxide to alpha cellulose content in the spinning solution reaches (0.5-5.0):100; and uniformly mixing and feeding for spinning; (C) feeding the spinning solution into a spinning machine, and enabling the spinning solution to pass through a spinneret orifice of a single-hole spray head under pressure, and solidifying and molding the formed viscose trickle to form raw silk strips, wherein the spray head is stretched by +60% to +80%, and an inlet channel of the spinneret orifice is in a parabola shape; and (D) performing aftertreatment: performing desulfurization, bleaching, oiling and drying on the raw silk strips to obtain the viscose flat monofilament. According to the production technology provided by the invention, the filament number of the prepared viscose monofilament is 50-6,000D, the strength is high over 75CN, and the requirements on dyeing, weaving and finished product taking are met; and moreover, the viscose extinction monofilament has gentle color and an extinction effect.

The invention provides a solidification method for preparing para-aramid by adopting dry jet-wet spinning. The method is characterized by comprising the following specific steps: extruding a PPTA-H2SO4 spinning solution from a spinneret plate; enabling liquid flow extruded from the spinneret plate to vertically pass through an air layer and feeding to a solidification bath; leading out through a godet wheel, so as to obtain a nascent fiber; and washing, winding and drying, so as to obtain a para-aramid fiber precursor, wherein the solidification bath is sulfuric acid solution and is formed by sulfuric acid and water; the mass fraction of the solidification bath is 2.0%-15.0%; and the temperature of the solidification bath is 1-12 DEG C. The fineness of the fiber can be significantly reduced under the condition of the solidification bath; the strength of the para-aramid fiber is improved; the apparent defects of the fiber can be reduced; and the fiber quality is improved, thus the stability of a spinning process and the quality of a fiber product can be effectively improved.

The invention discloses a structure capable of preventing railroad bed mud pumping and a paving method thereof. The structure is positioned between a railroad bed and a rail roadway ballast and comprises a first protective layer and a second protective layer. The paving method of the structure comprises the following steps of: 1) paving sand aggregate with an average grain diameter of 0.05-5mm on the surface of the railroad bed so as to form a sand cushion with the a the thickness of 4-6cm; 2) paving the broken stone with an average grain diameter of 5-7mm on the surface of the sand cushion, wherein the a the paving thickness of the broken stone is 3-6cm; 3) filling broken stone clearances with a polymer waterproof coating, wherein thea first protective layer is obtained after the polymer waterproof coating is solidified; 4) spraying a polyurea waterproof coating onto the surface of the first protective layer so as to form thea second protective layer with the thickness of 2-4 mm. Water infiltrating to the second protective layer is discharged through a dewatering slope of the first protective layer; ascending mud is isolated by the first protective layer, and the second protective layer forms thea second protection, so that the mud is effectively prevented from being pumped and extruded towards the railway railroad ballast or towards the outside through the railway ballast.

The invention relates to a multistage stretching technology for manufacture aramid fiber III, which belongs to the technical field of chemical fiber. The multistage stretching technology comprises a negative stretching technology, plasticizing stretching treatment, water washing and plasticizing stretching treatment again to obtain final products. The multistage stretching technology can obviously improve the mechanical property of aramid fiber III, the multifilament stretching strength is increased to 32cN/dtex from 30cN/dtex, and the stretching modulus is increased to 950cN/dtex from 850cN/dtex. High-strength and high-modulus fiber obtained can be applied to applicable fields with higher market requirements.

The invention discloses a pressurizing method for metal mold low-pressure casting of an aluminum alloy cylinder of a diesel engine, which comprises the following steps: step one, performing liquid-raising and pressurizing operations on an aluminum liquid; step two, performing filling type pressurizing operations on the aluminum liquid obtained in the step one; step three, pressurizing a cast obtained in the step two; step four, performing pressure-maintaining operations on the cast obtained in the step three; and step five, performing depressurizing operations on the cast obtained in the step four. The pressurizing method adopts a reasonable pressurizing specification to make the cast filled and molded smoothly and solidified sufficiently so that the structure of the cast is compact without generating hole defects to satisfy the sealing requirement, thus the method can make a high-compactness and high-strength aluminum alloy and a diesel engine cylinder body which is provided with a closed water-cooling cast-in cylinder sleeve.

The invention discloses a controllable cement backfilling grouting method. The method comprises the following steps: punching a grouting hole with aperture of 4-8 cm in the tunnel or the stratum; accessing a grouting pipe and a screw type grouting device in the grouting hole; preparing pasty cement grout according to the preparation proportion of cement grout materials; and performing low-pressuregrouting by adopting an intermittent grouting method until filling up the grouting hole. Since the cement grout is added with flocculant and prepared into the pasty cement grout, the intermittent grouting is performed by adopting an intersection grouting method and a circulation grouting method, the problem that the cement grout is wasted since the water-cement ratio in the prior grouting methodis excessively small, the corresponding additive is not added, and the intermittent grouting method is not adopted is solved, and the cost for tunnel construction or rehabilitation is reduced.

The invention discloses a solidification forming device suitable for manufacturing aramid III fibers through a dry jetting and wet spinning method. The solidification forming device comprises a solidification plate and a U-shaped solidification pipe, wherein the solidification plate is mainly composed of a solidification plate base, a sealing gasket, a solidification liquid distribution net, a solidification plate cover and an overflow tube, the U-shaped solidification pipe is mainly composed of a U-shaped pipe, an adjusting pipe and a fiber outlet pipe, one end of the U-shaped pipe is connected with the solidification plate, and the other end of the U-shaped pipe is movably connected with the adjusting pipe. The height difference between a liquid inlet of the U-shaped solidification pipe and a liquid outlet of the U-shaped solidification pipe can be adjusted according to the requirement for the spinning speed. Rapid and uniform solidification of aramid III nascent fibers can be achieved through the solidification forming device, the spinning speed of the aramid III fibers can be remarkably improved, production efficiency is improved, meanwhile, the manufactured fibers are good in quality, small in the number of burrs and neater in appearance, and due to the fact that the device is small in size and compact in structure, modularized manufacturing and replacement can further be achieved.

The invention discloses a railroad bed waterproof structure and a pavement method thereof. The waterproof structure is located between a railroad bed and railway ballast and comprises a waterproof layer which comprises gravel stacked on the surface of the railroad bed and a waterproof polymer coating arranged in gravel gaps in a filling manner; the waterproof polymer coating is poured or sprayed into the gravel gaps, and the waterproof layer is obtained after solidification of the waterproof coating; the waterproof layer is 3-6 cm thick and is 25-35 cm away from the rail flange, and the horizontal width of a main track is 4-6 m; the average particle size of the gravel is 5-7 mm. With the adoption of the pavement method, the waterproof layers with different thicknesses can be paved according to specific demands, the pavement method is simple and fast; the waterproof structure has excellent waterproof performance and comprehensive mechanical performance; further, the waterproof structure further comprises a sand bed arranged between the railroad bed and the waterproof layer as well as a gravel layer arranged between the waterproof layer and the railway ballast, and the mechanical performance and the waterproof performance of the waterproof structure can be further improved.

The invention provides a method for slitting a cement concrete pavement. Slitting is phased, so that the interior of the cement concrete pavement is sufficiently cooled and solidified. Slits are neat with no rough edges and the internal stress can be sufficiently released without extra cracks.

The invention discloses a sliding-resistant colored pavement surface and a paving method thereof. The paving method comprises the following steps that (1) cement concrete is subjected to blending, paving, vibrating, excess water removing and plastering, and then paved on a base layer of a pavement; (2) after a surface water film disappears and the surface temperature of the cement concrete is 15-45 DEG C, a retarder is sprayed to the surface of the cement concrete; (3) a plastic film is paved on the cement concrete immediately for primary curing; (4) the plastic film on the surface of the cement concrete is uncovered after the primary curing time is due, and uncondensed cement mortar on the surface of the cement concrete is brushed away; (5) secondary curing is conducted till the cement concrete reaches a certain strength; (6) after the cement concrete reaches the certain strength, dust and chips on the surface of the cement concrete are removed, and colored pigment is smeared; and (7) tertiary curing is conducted, and the whole paving process is completed after the cement strength reaches the final strength. According to the sliding-resistant colored pavement surface and the paving method thereof, the construction depth and friction coefficient of the cement concrete pavement surface are additionally considered, and meanwhile, the pavement is colored.

The invention discloses an ultrahigh molecular weight polyoxyethylene fiber and a preparation method thereof. The preparation method comprises the following steps of providing a spinning solution containing ultrahigh molecular weight polyoxyethylene, an antioxidant and a spinning solvent, wherein the spinning solvent comprises water, dimethyl sulfoxide, methanol, tetrahydrofuran, toluene, benzene,N,N-dimethylformamide, 1,4-dioxane and the like, and the molecular weight of the dissolved ultrahigh molecular weight polyoxyethylene is more than 70% of the retention rate of a raw material; and injecting the spinning solution into a coagulating bath for coagulation and fixation to obtain gel filaments by adopting a wet spinning method, then carrying out extraction treatment and drying to obtainultrahigh molecular weight polyoxyethylene extracted and dried fibers, and then carrying out hot drawing to obtain the ultrahigh molecular weight polyoxyethylene fibers. The ultrahigh molecular weight polyoxyethylene fiber disclosed by the invention has better mechanical property, higher fiber molecular weight than the raw material retention rate, high molecular weight and high orientation degree, and the preparation method is stable and feasible and is convenient for large-scale production.

The invention discloses a preparation method of microorganism solidification gel and belongs to the technical field of natural high molecular materials. According to the technical scheme, the preparation method comprises the following steps: firstly, mixing cellulose and oxidized acid liquid and reacting; then filtering, washing and drying to obtain cellulose oxide; after mixing and swelling chitosan, gelatin and water, heating, stirring and dissolving; adding casein and mixed strains; after mixing and fermenting, regulating the pH (Potential of Hydrogen) to be neutral to prepare solidification liquid; then mixing the solidification liquid, the cellulose oxide and saturated lime water and continuously introducing carbon dioxide to react, so as to prepare modified solidification liquid; then stirring and mixing the modified solidification liquid, latex and a solidification auxiliary agent, and standing; pressing, granulating and drying to obtain the microorganism solidification gel. Themicroorganism solidification gel disclosed by the invention has relatively high tensile strength, tearing strength and rigidity and has good mechanical properties.

The invention belongs to the technical field of food science, and in particular relates to a high-expansion-coefficient weight control product and a preparation process thereof. The product in the invention comprises raw materials including konjac glucomannan, pectin, bran and procyanidine. After being eaten, the product in the invention rapidly expands after absorbing water in the stomach to forma three-dimensional reticulated hydrogel and achieve the occupation purpose in the stomach; therefore, the product makes people feel full to reduce eating; and thus, the purpose of losing weight or controlling weight is achieved.

The invention discloses a ceramic tile adhesive. The ceramic tile adhesive is prepared from, by weight, 15-30 parts of modified polymer resin, 50-75 parts of a filler, 0.2-0.4 part of a thickening agent, 0.4-0.5 part of a defoaming agent, 1.0-1.6 parts of a preservative, 0.5-1.0 part of a stabilizer, 1.0-1.5 parts of a brightening agent and 0-5 parts of a color paste, wherein the modified polymerresin is starch grafted resin. The components of the ceramic tile adhesive are reasonably adjusted, the starch-grafted resin is used for improving the water retention capacity and the bonding force ofthe ceramic tile adhesive, water is inhibited from being too fast lost from the adhesive to a substrate or a tile, and the adhesive has enough water to be comprehensively solidified, so the bonding strength of the ceramic tile adhesive is further improved, and the ceramic tile adhesive has a wide application prospect.

The invention discloses an inner strip edge sealing process method of an inner honeycomb plate, and relates to the technical field of edge sealing of inner honeycomb plates. According to the technical key points, the method comprises the following steps: pre-milling; glue spraying; tape conveying; rolling; auxiliary pressing; and cutting. After the edge of a wooden honeycomb plate is milled, a mounting groove is enclosed by a wooden honeycomb plate and two partition plates. A sealing strip is placed in the mounting groove, and the side surface of the sealing strip is attached to the side wall of the mounting groove, so that the wooden honeycomb plate can be blocked through the sealing strip, the effect of protecting the wooden honeycomb plate is achieved, the wooden honeycomb plate can be prevented from being exposed outside, and the effect of improving the attractiveness is achieved.

A preparation method of a tin coating protective agent for a connector lead between gold-plated plates comprises the following steps: uniformly stirring deionized water and acrylic emulsion, adding ammonium polyphosphate, pentaerythritol, melamine and titanium dioxide, uniformly stirring, grinding the obtained slurry to required fineness, adding cellulose ether and a high-temperature-resistant antioxidant, and stirring to obtain the tin coating protective agent. The tin coating protective agent comprises, by mass,10-15% of the acrylic emulsion, 25-35% of the ammonium polyphosphate, 5-15% of the pentaerythritol, 5-8% of the melamine, 10-15% of the titanium dioxide, 1-3% of the cellulose ether and 3-5% of a high-temperature-resistant antioxidant. A gold removing and tin -coating method for the connector comprises the following steps: immersing a lead part needing to be protected in a protective agent, dipping in the protective agent, airing in the air, standing and drying, cooling to room temperature, and carrying out gold-removing and tin-coating. The connector lead is immersed in deionized water, the protective agent is removed, and airing is performed at room temperature to achieve the effects of removing gold and tinning. The protective agent is reasonable and controllable in component concentration, simple and feasible in preparation method, moderate in viscosity, easy to cure, resistant to high temperature, free of corrosion to a substrate and capable of being stripped after being washed with water.

The invention discloses a rapid paraffin sectioning method for plant tissue. The method comprises the following steps: sampling, fixation, dehydration and vitrification, paraffin embedding and sectioning, gluing tablets and spreading tablets, and dyeing and cementing. The invention greatly improves fixation efficiency of paraffin sectioning for plant tissue by 10-20 times, compared with a fixation time of one day in traditional paraffin sectioning; tert-butyl alcohol or n-butanol is used as a dehydrating agent and a transparent agent to simplify the dehydration and vitrification step, and the dehydration and vitrification only consumes 6-7h, which has efficiency improved by more than 3 times compared with a traditional dehydration and vitrification; and infiltration efficiency of the plant tissue in paraffin and embedding quality are improved, and the penetration consumes 4-7h, which has efficiency improved by more than one time compared with the traditional paraffin infiltration method, so as to effectively solve problems of tissue hardening and brittleness caused by high temperature during the paraffin infiltration. The invention has the characteristics of simplified experimental procedures, low equipment price, short production cycle, high sectioning quality, safety and environment-friendliness.

The invention provides a roadbed construction method for a soft foundation area, and relates to the field of roadbed construction. According to the roadbed construction method for the soft foundationarea, a main body is included, side edge layers are arranged on the two sides of the main body correspondingly, stirring piles are arranged in the main body in a penetrating mode, a bonding layer is arranged on the upper end face of the main body, a gravel layer is arranged at the upper end of the bonding layer, and an asphalt layer is arranged at the upper end of the gravel layer. Arc-shaped edges are arranged at the upper ends of the side edge layers and opposite to the two sides of the gravel layer. The stirring piles are effectively used through effective construction, cement and soft soilare fully mixed to form reinforcement, the roadbed is reinforced through the gravel layer and the asphalt layer, the roadbed is waterproof through a waterproof agent with which the asphalt layer is coated, and water is guided through the arc-shaped edges at the side edge layers.