49results about How to "Stable and durable" patented technology

The invention provides a method for constructing a super-hydrophilic layer of a polyvinylidene fluoride hollow fiber ultrafiltration membrane and belongs to the technical field of materials. The method comprises the following steps of: generating C-C unsaturated bonds, hydroxyls and carboxyls on the surface of the polyvinylidene fluoride (PVDF) ultrafiltration membrane through pretreatment by using the mixed solution of a strong base and potassium permanganate, respectively grafting hydrophilic acrylic acid and alcohol monomers to the surface of the PVDF ultrafiltration membrane by free radical grafting reaction and esterification reaction under the actions of an inorganic acidic catalyst and an organic peroxide initiator, wherein a stable super-hydrophilic layer is constructued on the surface of the membrane under the synergic action of the two monomers to obstruct the adsorption and deposition of organic matters on the surface of the membrane efficiently. Consequently, the PVDF hollow fiber ultrafiltration membrane is provided with high resistance to organic matter pollution and super hydrophilicity; after super hydrophilic modification treatment, the water flux of the PVDF hollow fiber ultrafiltration membrane is 100-200% higher than before.

The invention discloses a plastic shell structure. The plastic shell structure comprises a plastic shell and a PET composite decorative film attached to the inner side surface of the plastic shell. The PET composite decorative film comprises a PET substrate, and the PET substrate comprises a fitting surface and a decoration surface. The decoration surface of the PET substrate is provided with an ink printing layer, a UV grain layer and an optical coating layer in sequence; the optical coating layer of the PET composite decorative film is provided with an LDS antenna. The invention also discloses a manufacturing method of a plastic shell structure. The large-area waterproof and dustproof antenna manufactured in the plastic shell solves the industrial problems that the surface of the fragmented and dispersive electronic component assembly structures in a traditional 3C electronic product plastic shell has no enough space to design a 5G signal antenna, and when the antenna is made at thesurface of the plastic shell, the product appearance decoration effect is influenced, the antenna is easy to be damaged to cause whole damaging of the product and difficult to maintain. The plastic shell structure has glass or ceramic appearance effects, is light and fashion and novel in appearance, and is anti-fall and waterproof.

The invention relates to an industrial gas synergist. The industrial gas synergist is prepared by 80 percent of carbon alkane (C5H12), 4 percent of n-propanol (C3H80), 3.7 percent of hexane (C6H14), 0.8 percent of cyclohexane (C6H12), 8 percent of Mobil (isoparaffin solvent), 3.5 percent of kerosene (CH3(CH2)nCH3) and 0.025 percent of paint. The preparation method of the industrial gas synergist comprises the following steps: taking the carbon alkane (C5H12); adding n-propanol (C3H80) and Mobil (isoparaffin solvent) and stirring for 3 hours; then, adding the hexane (C6H14) and the cyclohexane(C6H12) and suitably sealing for 8 hours; controlling temperature to be about 30 DEG C; adding the kerosene (CH3(CH2)nCH3) and stirring for 1 hour; and finally adding the paint to prepare a finished product. The industrial gas synergist is innoxious and noncorrosive and has special efficacy, such as combustion supporting, polymerization suppression, catalysis, cracking, and the like.

The present invention provides a meningococcal conjugate vaccine for groups A, C, Y and W135, which is a tetravalent conjugate vaccine comprising polysaccharide-protein conjugates obtained by respectively conjugating a capsular polysaccharide of Neisseria meningitides groups A, C, Y and W135 to a outer membrane vesicle protein selected from a group consisting of Neisseria meningitides group B serotypes 4 and 15 outer membrane vesicle proteins. The meningococcal conjugate vaccine provided by the present invention may effectively avoid the risk of affecting the immune response to vaccines resulting from immune tolerance and competition between antigenic sites existing in multivalent conjugate vaccines prepared from a single carrier protein; the meningococcal conjugate vaccine provided by the present invention may avoid the safety risk of allergic reactions, toxicity reversion and the like which exist in conjugate vaccines prepared by using TT and DT as carrier proteins; and the meningococcal conjugate vaccine provided by the present invention may enhance immunity to Neisseria meningitides group A and provide a bactericidal antibody having relatively extensive protective effect against Neisseria meningitides group B. Meanwhile, the present invention provides a complete production process of a meningococcal conjugate vaccine for groups A, C, Y and W135, which is applicable to large-scale production. Studies have demonstrated that the present vaccine has good immunogenicity, reliable safety and stable immunity persistence.

The invention relates to a preparation method of a primary-taste modified rice fresh keeping agent material, and belongs to the technical field of food additive materials. The technical scheme adoptedby the invention lies in that the primary-taste modified rice fresh keeping agent material is prepared by using rice husks as raw materials; the rice husks contain rich antioxidation peptide, the rice husks are subjected to enzymolysis and collection, the rice husks are coated with essential oil, and a microcapsule structure is formed; the microcapsule structure can effectively relieve the releasing efficiency of the essential oil, so that the essential oil material has excellent slow release performance; in the storage course, due to massive release of the essential oil at the initial stage,after the essential oil disappears at the later stage, due to the effects of the antioxidation peptide, the fresh keeping agent material continues forming antioxygenic properties, so that the antioxidation durability of the rice fresh keeping agent material can be effectively improved; an adsorbent material is prepared by using the rice husks as raw materials, so that when the adsorbent materialis added to fresh keeping agent microspheres, the adsorbent material can effectively adsorb surplus essential oil smell; and besides, excellent pore canal structure of the fresh keeping agent materialcan be maintained, and the releasing properties and the durability of the fresh keeping agent material can be stable.

The inventio discloses a knee arthroscope joint distraction device for orthopedics department. The knee arthroscope joint distraction device includes an extension column in a hollow column shape, a control board capable of swinging up and down is arranged at the front end of the extension column, and distraction heads capable of moving up and down and swing front and back are arranged at the top ends and the bottom ends of the control board correspondingly; a disc-shaped rotating disc is rotatably connected to the outer circumference of the rear end of the extension column, the rear end surface of the extension column is fixedly connected with a pointer plate, the rotating disc is hinged to the inner side of an annular positioning ring, inserting plates which can move back and forth are arranged at the left and right ends of the positioning ring, and clamping plates capable of swing left and right are hinged to the front ends of the inserting plates; the bottom ends of the clamping plates are connected by clamping straps; and the left ends and the right ends of the clamping straps extend out of the clamping plates and connected by velcros. The problems that distraction devices havehigh excessively requirements on incisions and cannot effectively distract a knee joint of a patient for a long time in current knee arthroscopic surgery are effectively solved.

The invention discloses an inner hole pressing and positioning mechanism, and belongs to the technical field of workpiece positioning. The inner hole pressing and positioning mechanism comprises a support leg structure, a workbench structure and a positioning and pressing structure, the support leg structure is arranged on the horizontal plane, the workbench structure is arranged on the support leg structure, and the positioning and pressing structure is arranged at the center of the workbench structure; and the positioning and clamping structure is provided with a telescopic fixing structureand a power structure, and the power structure is installed at the lower end of the telescopic fixing structure. According to the inner hole pressing and positioning mechanism, an inner hole of a workpiece is positioned and pressed through an arranged telescopic fixing structure, pressing and loosening are completed under the action of the power structure, and therefore the inner hole pressing andpositioning mechanism is high in workpiece positioning and pressing stability and convenient to operate, meanwhile, dust and chippings can be prevented from leaking into the inner hole pressing and positioning mechanism in the positioning and pressing process, abrasion is low, and the service life of staff is long.

The invention discloses a high density polyurethane foam. The polyurethane foam is prepared from the following components in parts by weight: 55-65 parts of amino-terminated hyperbranched polyurethane, 8-16 parts of a 2,3-quinolindicarboxylic acid/2,4-diamino-6-diallylamino-1,3,5-triazine polycondensate, 3-5 parts of 1,2-epoxy-4-vinyl cyclohexane, 0.5-1 part of a foam stabilizer, 5-10 parts of a foaming agent and 1-2 parts of an initiator. The invention also discloses a preparation method of the high-density polyurethane foam. The high-density polyurethane foam disclosed by the invention is high in density, sufficient in rebound resilience and compression resistance, and good in durability, stability, aging resistance and flame retardance.

The present invention relates to a beverage product comprising a container, a liquid and a dairy foam on top of the liquid covering its surface. The dairy foam comprises 9Q to about 100 wt% milk and milk fat, 0-10 wt% sweetener, and from 0.1 to about 1,5 wtl, preferably from 0.1 to about 1,0 wt% of a stabilizer. According to the invention the dairy foam has been applied first to an inner wall of the container along the entire circumference of said container before filling up the complete surface of the liquid so that it sticks to said inner wall. The present invention also relates to a method for manufacturing such a beverage product.

The invention provides a preparation method of red pitaya wine. Fresh red pitayas are selected, and through blanching, mashing, deodorization treatment through alcohol, extraction, rough filtering, clarification, dilution and blending, the red pitaya wine is prepared. The red pitaya wine prepared by adopting the preparation method has bright color and lustre, the fruit aroma coordinates with the wine aroma, the flavor is good, the sweet and sour taste is suitable, and the red pitaya wine has a typical red pitaya style; moreover, according to the prepared red pitaya wine, the betanin content ishigher, much betanin of the red pitayas are preserved, and the red pitaya wine has the efficacy of resisting fatigue, enhancing the immunity and the like, so that the value of the red pitayas is further improved.