5results about How to "Strong replicability" patented technology

The application discloses a paper-based and pulp molded product strong water-based structure resin composition for constructing a fiber matrix, a kit and a preparation and application method thereof, and belongs to the technical field of papermaking wet end chemistry and pulp molding materials. In response to the global trend of replacing plastic with paper and fluorine-free control of food contact materials, the application aims at the pain point of failure of traditional chemicals in a high recycling pulp proportion and a closed water circulation high conductivity system, and constructs an acrylic polycarboxylic acid polymer and inorganic-organic dual charge buffer synergistic system. The scheme realizes the multiplication effect of physical strength such as breaking and ring pressure and the water resistance and oil resistance barrier performance by a unique crosslinking mechanism at a very low dosage, which is better than conventional enhancement technology on the market. The composition is a full water-based system and does not contain perfluorinated compounds, which ensures complete pulp recycling while giving the product excellent wet stiffness and film-forming density, and provides a green solution with high efficiency, low cost advantage and compliance for the papermaking and pulp molding industry.

The utility model discloses a kind of edge alignment devices with batten board, comprising: machine table, backrest, G-type clamp and straight knife;The table top of machine table has aperture;Backrest is placed on the table top, backrest has guide end, the side wall of guide end is divided into upper part and lower part, lower part is straight edge along vertical direction, upper part is bevel edge or straight edge along vertical direction, backrest has slot hole in the position of the side wall of guide end, slot hole is located above aperture;G-type clamp clamps backrest on the table top;Straight knife is set in aperture by passing through slot hole, the outer diameter of straight knife and the lower part of the side wall of guide end keep same straight plane;Wherein, batten board includes board piece and batten, board piece includes board face and milling slot located at the four edges of board face, batten is sleeved in milling slot, the bottom edge of board piece is close to the table top, side edge is close to the lower part of the side wall of guide end.The above technical solution can solve the problem of board piece size error, edge burst, size head.

This invention relates to the field of aluminum alloy investment casting technology, and discloses a method for preparing a mold for aluminum alloy investment casting with a narrow internal cavity structure. The method includes designing a pre-reserved core structure for the mold, mold making, filling the mold cavity, mold assembly, shell fabrication, dewaxing, firing, pouring, cleaning, and inspection. This invention, through the design of the pre-reserved core structure and the design of the slurry composition, ensures the dimensional accuracy of the narrow internal cavity structure of the casting. Furthermore, during the pre-filling process of the mold cavity, α-gypsum powder, chromite sand, wood fiber, and glass fiber are mixed in proportion with solvents such as distilled water and silica sol, ensuring good reproducibility, thermal conductivity, permeability, fluidity, and strength of the slurry material. Vacuuming followed by drainage reduces bubble formation and improves the integrity of the mold. This method achieves high-quality and high-efficiency production of aluminum alloy castings with narrow internal cavities compared to traditional investment casting processes.

This invention discloses a method for improving the microstructure and properties of double-wire submerged arc welded joints for bridge steel, belonging to the field of steel structure welding technology. The method includes: employing a double-sided V-groove design; selecting TMW-C2NiKq welding wire with a Ni content of not less than 0.24% and TMW-B121q flux; maintaining the interpass temperature at 90–130℃ by controlling the current-voltage matching and heat input of the double wires within the range of 80–110 kJ / cm; and effectively suppressing the expansion of the coarse-grained zone and the formation of the weld softening zone by combining alternating positive and negative welding sequences. After welding, the width of the coarse-grained zone of the joint is ≤2.6 mm, the microhardness of the softest zone is ≥140 HV10, and the impact absorption energy at –40℃ is ≥120 J. This method requires no additional equipment, is suitable for the efficient manufacturing of welded structures of 30–50 mm thick bridge steel, and has good process stability and promising engineering application prospects.

The present application relates to the technical field of rotavirus, and particularly relates to a G8P[8] type group A rotavirus CZ-23 and application thereof.A G8P[8] type group A rotavirus CZ-23 has been preserved in the China General Microbiological Culture Collection Center CGMCC on April 11, 2023, the address of the preservation center is No. 1, Xibaheyanli 3, Chaoyang District, Beijing, and the preservation number is CGMCC NO. 45559.The present application provides a new human rotavirus wild type strain, which is first reported to be isolated in China, the virus replication capacity of the strain is strong, the genetic stability is good, the strain can be applied to develop a vaccine strain of human rotavirus vaccine, and is suitable for a live attenuated rotavirus oral vaccine.