252results about How to "Retain performance" patented technology

The invention discloses a thermoplastic polyurethane elastomer foam bead and a preparation method thereof. The method comprises the following steps: firstly, adding thermoplastic polyurethane particles and water to a reaction kettle according to the mass ratio of 1 to (0.8-4); adding liquid carbon dioxide to the reaction kettle, and controlling the intensity of pressure and the temperature in the reaction kettle, so that the carbon dioxide in the reaction kettle is in a super-critical state; raising the temperature inside the reaction kettle to 90-140 DEG C; carrying out heat preservation; putting the materials in the kettle into a pressure tank, maintaining pressure, and cooling to below 70 DEG C; foaming the thermoplastic polyurethane elastomer particles once, and controlling the volume ratio of the reaction pressure to the pressure tank to be 1 to (15-30); putting the disposable foam particles into a storage tank, and carrying out secondary normal pressure foaming to obtain thermoplastic polyurethane elastomer foam beads; and removing the surface moisture of the foam beads, and curing the foam beads at normal pressure and normal temperature for over 48 hours, so as to obtain the product. The product disclosed by the invention has the characteristics of even and compact cells, small size, high percentage of closed area, high molding product strength, good rebound resilience and the like.

An improved process for the catalytic partial oxidation of hydrocarbons to produce hydrogen and carbon monoxide is disclosed. The process also utilizes a novel catalyst configuration containing at least two serially aligned layers containing a noble metal or transition metal catalyst supported on a support. Alternatively the process employs only the first layer of a catalytically active metal dispersed on an inert carrier support to partially oxidize hydrocarbons.

The invention relates to a process for preparing sesame oil. The process comprises the following steps of: removing impurities from sesame serving as a raw material, roughly washing the sesame, immersing and flushing the sesame, dehydrating and drying the sesame until the water content is reduced to 4.5 to 7wt%, then baking until the water content is reduced to below 2.5wt%, squeezing by a vertical type hydraulic squeezing machine at low temperature to obtain oil, and performing natural sedimentation and filtration on the squeezed rough oil to obtain the edible sesame oil. The technical steps are reasonable; the process is easy to operate; the prepared sesame oil has no rich sesame oil flavor; the flavor is natural and pure; the gloss is clear and crystal; the taste is mellow; and the original essence in the sesame can be retained to the maximum extent.

The invention relates to protocol stack technologies and discloses a three-layer switch equipment based user mode protocol stack implementation method. The method includes steps: step one, constructing a user mode protocol stack in a user mode, transplanting a layer L2 and a layer L3 to the user mode protocol stack, and keeping a layer L4 and a kernel driver in a kernel mode, wherein the layer L2 is mainly used for management of network equipment interfaces and interaction with network equipment drivers, and the L3 layer is a kernel of the protocol stack and mainly used for realizing various network protocols; step two, establishing communication between the layer L2 and the kernel driver kept in the kernel mode by means of memory mapping, and realizing communication between the layer L3 and the layer L4 through a socket I / O provided by the kernel. By adoption of the method for implementation of the user mode protocol stack, subsequent large-scale development is carried out under the user mode, and accordingly development difficulty is lowered, and performances of a data forwarding plane are improved.

The invention relates to a preparation technology of an artificial bone repairing material in the fields of an inorganic nonmetallic material and a biomedical material, and particularly relates to a three-dimensional ordered porous bracket material of chitosan fiber / bioactive glass and a preparation method of the three-dimensional ordered porous bracket material. The porous bracket material is composite bioactive glass at the surface of a chitosan fiber; the aperture is 80-500mu m; adhesive proliferation of a human bone cell is facilitated; and rapid forming of a new bone is facilitated. The preparation method comprises the steps of: coating mixed pulp of the bioactive glass on chitosan fiber cloth which is reinforced by puncture by a sol-gel dip-coating method, drying and repeating for 0-3 times. The three-dimensional ordered porous bracket material has the advantages of good biological activity, biocompatibility, biological degradability and the like, has obvious mechanical strength and good mechanical property, and can meet the demands of providing stress support to a bone repair part.

The invention discloses a preparation method of an ionic liquid polymer grafted magnetic carbon nanotube. The method comprises the following steps: reacting halogenated hydrocarbon with 1-vinyl imidazole to synthesize an ionic liquid for later use, carrying out acidifying oxidation treatment on an original carbon nanotube by using concentrated sulfuric acid and concentrated nitric acid, and reacting the obtained carbon nanotube with thionyl chloride and ethylene glycol to obtain a hydroxylated carbon nanotube; loading an initiator bromoisobutyryl bromide to the surface of the hydroxylated carbon nanotube, and initiating polymerization of the ionic liquid on the surface of the carbon nanotube; and carrying out one-step simple ion exchange to introduce magnetic anions in order to synthesize the novel magnetic carbon nanotube. The magnetic carbon nanotube prepared in the invention has nanometer dimension and strong magnetism, and can be rapidly separated and enriched through simple magnetic field action.

The invention discloses a microwave radiation reclaiming method for environment-friendly high-strength reclaimed rubber, and belongs to the technical field of waste rubber reclaiming. The method comprises the following steps of: mixing waste rubber outer tire crown powder with the particle size of 20 meshes, rosin and dipentene according to a certain proportion; uniformly feeding the materials with a certain thickness on a roller way conveying device; determining the length of a roller way according to microwave radiation time; arranging a high-frequency microwave radiation device on the roller way; conveying the materials on the roller way for reclaiming the materials by microwave radiation during conveying; continuously putting the reclaimed rubber materials into a cooling device through the roller way; directly discharging the cooled materials to an open mill for performing refining, wherein the refining temperature is controlled to be 35-50 DEG C; and refining at low temperature on the open mill for 20 minutes to obtain a refined rubber sheet with smooth surface and uniform texture. A test result shows that the tensile strength of the reclaimed rubber is more than 18MPa, the breaking elongation is over 400%, and the Weigert plasticity is 0.35-0.45. The microwave radiation reclaiming method has the advantages of environment friendliness, short reclaiming time, low reclaiming temperature, energy conservation and high production efficiency.

The invention discloses synthetic-leather-used UV solidifying and flame-retarding polyurethane and a preparation method thereof. The method is characterized by comprising the steps that low-viscosity liquid dihydric alcohol and diisocyanate serve as raw materials, side-group phosphorus / nitrogen-containing dihidroxy acrylate is introduced into the polyurethane structure in the form of chain extender, and then side-group phosphorus-containing monohydroxy acrylate is used for sealing the end. Both a main chain and a side chain of the obtained UV solidifying polyurethane contain photosensitive perssad, through the UV solidification, the crosslinking degree and relative molecular mass of resin can be improved, the contradiction between the fact that photosensitive perssad in traditional UV solidifying polyurethane is low in content and the fact that the molecular weight of coating polymer is high in requirement is reconciled, and meanwhile the comprehensive performance of the polyurethane such as wear resistance, scratch resistance, waterproofness, heat resistance and solvent resistance is improved; phosphorus / nitrogen flame-retarding ingredients are 'suspended'on the macromolecular side chain of the polyurethane, the flame-retarding effect is good, and fire retardant is not migrated or separated out and is resistant to hydrolysis in the storage and using processes; in addition, no organic solvent is used in the preparation process of the polyurethane, and the synthetic-leather-used UV solidifying and flame-retarding polyurethane has the advantages of being prominent in greenness, environment-friendliness, health, safety and the like and can be used in synthetic leather manufacturing and coating materials such as leather and textiles.

The invention discloses a fluoride rubber and plastic sealing material with good performance and low cost, and a preparation method of the rubber. The sealing material comprises the following raw materials in part by weight: 40-80 parts of fluorous rubber, 5-20 parts of calcium silicate, 5-20 parts of carbon black, 5-20 parts of magnesium oxide and 0.5-2 parts of cross-linking agent. The method comprises the steps of arranging the fluorous rubber in an internal mixer at the temperature of 150-160 DEG C with the plasticating time of 4min-10min, adding the carbon black, 1 / 3 of the magnesium oxide and 1 / 3 of the calcium silicate with the plasticating time of 6min-8min, then adding the rest magnesium oxide and calcium silicate, plasticating, stopping, overturning the warehouse to output the materials for spare use, arranging the materials in an open mill, adding the cross-linking agent at the temperature less than or equal to 65 DEG C, thinly introducing four times after material feed, packing with a triangular bag five times, and feeding plates.