10results about How to "Excellent mechanical properties" patented technology

The present application relates to the technical field of bamboo fiber composite material, in particular to a purification preparation method of bamboo fiber reinforced natural polymer composite material. The bamboo raw material is crushed and treated by steam explosion to obtain primary bamboo fiber; the primary bamboo fiber is sequentially subjected to organic solvent dewaxing treatment and oxidation system selective delignification treatment to obtain purified bamboo fiber; the purified bamboo fiber is treated in a tannin acid solution to form a polyphenol interface layer on the surface thereof; and a solution containing polyvalent metal ions is added to the treated bamboo fiber to form a coordination cross-linking interface layer on the surface of the bamboo fiber. The present application constructs a stable interface layer between the fiber and the natural polymer matrix. The interface layer can effectively transfer stress, significantly improve the tensile strength, bending strength and shear strength of the composite material, and solve the problem of weak interface and easy delamination of traditional natural composite materials.

This invention relates to polyimide composite powders containing silane agents and methods for preparing the same. More specifically, the method for preparing the polyimide composite powder includes: step a), preparing polyamic acid by means of dianhydrides and diamines; and step b), imidizing the polyamic acid prepared in step a) by adding a silane agent. This invention uses a silane agent in a specific ratio and employs aqueous polymerization, thereby improving flowability and dispersibility without reducing mechanical properties.

Examples relate to thin films, transparent laminates, applications as cover films, and multilayer electronic devices incorporating the thin film, which possess excellent optical properties such as refractive index, haze, and yellowness, as well as excellent mechanical properties. The thin film includes an elastic layer with a refractive index of 1.48 to 1.58 and a low-temperature damage index (the difference between tensile modulus and tensile strength at a specific temperature), wherein the low-temperature damage index of the elastic layer at -40°C is below 1300 MPa.

Provided is a stereoscopic molding resin composition containing a multifunctional urethane (meth) acrylate having a molecular weight of 700 or more and 1,300 or less.

This application provides a stator core, stator, motor, powertrain, and vehicle, including: multiple stator laminations; the multiple stator laminations are stacked along the axial direction of the stator core, and each stator lamination includes N layers of first amorphous alloy sheets, where N≥1; wherein, the ratio of the axial dimension of the stator lamination along the stator core to the maximum radial dimension of the stator lamination along the stator core is the stator lamination diameter coefficient, which is 0.19‰~1.68‰. During the stamping process of obtaining stator laminations, by controlling the ratio of the axial dimension of the stator lamination along the stator core to the maximum radial dimension of the stator lamination, i.e., the stator lamination diameter coefficient, within a suitable range, the possibility of edge warping or even breakage of the stator laminations can be reduced, which is beneficial to improving the yield rate of the stator laminations.

The present application relates to the technical field of ore dressing equipment, in particular to a large-scale flip-flop screen with an octagonal tube supporting structure, a supporting beam comprising an octagonal tube and end plates arranged at both ends of the octagonal tube and fixed to the inner side wall of a screen box; a fixed hoop is clamped on the octagonal tube; a supporting strip comprises a strip-shaped plate fixed to the top of the fixed hoop, a sleeve ring fixed to the strip-shaped plate, a vertical rod slidingly sleeved in the sleeve ring, a spherical shell fixed to the top end of the vertical rod, a ball head rotatably sleeved in the spherical shell, and an internally threaded pipe fixed to the top end of the ball head; a lower strip arranged above the strip-shaped plate is provided with perforations three; a plurality of strip-shaped screen meshes are arranged in a horizontal staggered manner, and both sides of the strip-shaped screen mesh are provided with perforations one; a connecting piece is sequentially sleeved with the perforations one, three, and the internally threaded pipe; the top surface of an edge beam fixed to the inner side wall of the screen box and located below the strip-shaped screen mesh is provided with a threaded hole; and the problem that the flexible screen mesh in the large-scale flip-flop screen is inconvenient to assemble and maintain is better solved.

This invention relates to a food packaging material and a method for manufacturing the food packaging material. The food packaging material of this invention comprises a paper substrate having a first side and a second side, the second side being opposite to the first side, wherein the paper substrate is coated with a coating on at least the first side or the second side, the coating comprising wax and a copolymer selected from styrene-butadiene copolymers and / or styrene-acrylic copolymers.

The utility model discloses a hollow ball screw quenching device belongs to ball screw processing technical field, including the feeding platform, the one side fixed mounting of feeding platform has the cooling platform, the one side fixed mounting of cooling platform has the sectional quenching box, the inside of feeding platform is provided with the sliding slot, the inside fixed mounting of sliding slot has the sliding board, in the utility model, through setting telescopic cover and fixed clamp, through the moving program of control box setting, will the feeding tray move to first heating chamber, after heating, through controlling the feeding tray to move to second heating chamber and heat finally, after heating, through controlling the feeding tray to move to the one side of sectional quenching box, control fixed clamp to the hollow ball screw after heating and take the inside of cooling groove and move, through a plurality of cooling spray pipe and carry out hollow ball screw cooling, and quenching process makes hollow ball screw in lightweight, high accuracy, long life etc. Contradictory demand obtains the best balance.

This specification provides a structure for in vitro blood perfusion that can effectively remove reactive oxygen species (ROS) that cause inflammation in the blood, an in vitro blood perfusion tube including the structure and an in vitro blood purification device, a method for preparing the structure, and an in vitro blood purification method using the in vitro blood purification device, wherein the structure for in vitro blood perfusion includes cerium dioxide nanoparticles and a carrier loaded with cerium dioxide nanoparticles.

The application provides a preparation method of a composite dielectric elastomer film and a dielectric elastomer film actuator. The preparation method comprises the following steps: step 1: mixing BTRU@CDs giant electro-rheological particles with an electro-rheological liquid dispersion phase to obtain a suspension; step 2: uniformly mixing silicone rubber with the suspension to obtain a composite dielectric elastomer prepolymer, wherein the mass ratio of the silicone rubber to the suspension is 15:1 to 1:1, and the mass ratio of the BTRU@CDs giant electro-rheological particles in the composite dielectric elastomer prepolymer is 5-40%; and step 3: film forming is performed on the composite dielectric elastomer prepolymer to obtain a composite dielectric elastomer film. The composite dielectric elastomer film prepared by the preparation method of the composite dielectric elastomer film has better actuating performance, better mechanical performance and better cycle stability than traditional rubber elastomers. The problems of high driving voltage, large pre-stretching ratio, limited actuating strain, poor fatigue resistance and easy breakdown of existing dielectric elastomer materials are solved.