8results about How to "Improve surface strength" patented technology

The utility model relates to the technical field of aluminum alloy sections, in particular to a high-strength aluminum alloy section for a combined energy-saving curtain wall, which comprises a stand column, a plurality of rib columns distributed at equal intervals are arranged on the inner side of the stand column, and ribs are arranged on the periphery of each rib column. The cross beams are located on the front side and the rear side of the stand column, fixing cylinders are arranged on the inner sides of the cross beams, and reinforcing fins are fixedly connected between the peripheries of the outer surfaces of the fixing cylinders and the inner walls of the cross beams. Under the action of the rib columns, the ribs and the honeycomb fiber braid layer, the aluminum alloy profile has the advantages of high strength and large bearing load, and the problem that the aluminum alloy profile for the combined energy-saving curtain wall possibly has insufficient strength in certain specific application scenes is solved; in particular, in a large-span, high-wind-pressure or complex-modeling curtain wall system, most traditional aluminum alloy sections are designed into single cavities, and deformation is prone to occurring when large loads are borne.

The utility model discloses a tantalum capacitor shell packaging structure that improves mechanical strength relates to tantalum capacitor shell packaging technical field, including outer layer packaging shell and middle layer packaging shell, the inside of outer layer packaging shell is provided with middle layer packaging shell, and the inside of middle layer packaging shell is provided with inner layer packaging shell, and the top surface of outer layer packaging shell is provided with first reinforcing rib, and the left and right sides of outer layer packaging shell all are provided with second reinforcing rib. This tantalum capacitor shell packaging structure that improves mechanical strength, through being provided with the outer layer packaging shell of layer -by -layer nesting structure, middle layer packaging shell, inner layer packaging shell, utilize the cooperation of the structure between three, can provide structural protection for internal component as far as possible, to guarantee the operation stability of whole, cooperate the structural setting of base, first reinforcing rib and second reinforcing rib, can further guarantee the mechanical strength of whole packaging structure like this.

The present application relates to a kind of water-based quick-drying coating for casting and its preparation method, the water-based quick-drying coating is prepared by the following raw materials according to weight percentage, refractory aggregate 60~80%, binder 3~10%, suspending agent solution 0.5~5%, quick-drying aid 0.2~1.0%, dispersing agent 0.2~1.0%, defoaming agent 0.1~1.0%, water-reducing agent 0.2~1.0%, carrier liquid 14~25%.The water-based casting coating of the present application has the characteristics of short drying time, small gas evolution, high surface strength.

The invention discloses a preparation method and application of a composite paper surface reinforcing agent. The surface reinforcing agent comprises a cross-linked amphoteric polyacrylamide emulsion and an alkyl ketene dimer (AKD) emulsion. The cross-linking type amphoteric polyacrylamide emulsion is a cross-linking type polyacrylamide emulsion with an interpenetrating network structure, which is prepared by taking a polyvinylamine-co-sodium acrylate amphoteric polymer as a polymer emulsifier through soap-free polymerization. The preparation method comprises the following steps: firstly, taking N-vinylformamide and acrylic acid as raw materials, carrying out water solution free radical polymerization to obtain a poly (N-vinylformamide-co-acrylic acid) copolymer, and then carrying out alkaline hydrolysis to obtain a polyvinylamine-co-sodium acrylate amphoteric polymer; and performing soap-free emulsion polymerization on the amphoteric polymer serving as an emulsifier, an acrylamide monomer, a crosslinking monomer and the like to obtain the crosslinking amphoteric polyacrylamide emulsion. The surface reinforcing agent is compounded with AKD emulsion for use, the ring crush compression resistance, folding strength, bursting strength, tensile strength and surface strength of paper can be remarkably improved, and meanwhile, the surface reinforcing agent has good water resistance and moisture regain resistance and is environmentally friendly and non-toxic.

This invention provides a method for preparing coated notebook paper, comprising the following steps: S1, preparing base paper; S2, coating the surface of the base paper to form a coating layer, the coating layer comprising pigments and adhesives, wherein the adhesives comprise polyvinyl alcohol and enzyme-converted starch, comprising 100-110 parts by weight of pigment, 3-5 parts by weight of polyvinyl alcohol, and 10-14 parts by weight of enzyme-converted starch; S3, subjecting the base paper treated in step S2 to a second drying, calendering, and winding process to obtain the coated notebook paper. This application also provides coated notebook paper prepared by the above method. The coated notebook paper prepared by the method provided in this application has a fine surface, smooth writing, minimal pen wear, minimal ink bleeding, and rapid drying. It also possesses good coating strength and anti-bleed-through properties, making it particularly suitable as high-grade notebook paper.

The utility model relates to the technical field of wainscots, and discloses a wainscot for indoor decoration, which comprises an anti-corrosion layer, a waterproof layer, a reinforcing layer, a wormwood fiber layer, a shock absorption layer, a sound absorption layer, an isolation layer and an anti-collision layer, the waterproof layer is fixedly connected to the upper surface of the anti-corrosion layer, and the reinforcing layer is fixedly connected to the upper surface of the waterproof layer. The anti-corrosion layer is formed by laying the bamboo wood fiber boards, the bamboo wood fiber boards are light in material, not prone to deformation and aging and good in anti-corrosion effect, the service life of the attached position of the wall protection board and a wall can be guaranteed, the waterproof layer is formed by laying the plastic film, water can be prevented from permeating into the wall protection board, and the service life of the wall protection board is prolonged. The reinforcing layer is formed by laying PVC boards, the internal strength of the wall protection board can be improved, the wormwood fiber layer is formed by pressing wormwood fibers and has certain flexibility and elasticity, and when the wormwood fibers are impacted by external force, the wormwood fibers can absorb and disperse impact energy through deformation of the wormwood fibers.

The application discloses a light autoclaved aerated concrete block and relates to the technical field of concrete blocks.The light autoclaved aerated concrete block comprises the following raw materials: cement, lime, base material, modified palygorskite, calcium sulfate dihydrate, aluminum paste, foam stabilizer and deionized water.In the application, the fibrous structure of the modified palygorskite can form a network framework in the slurry, fill the internal pores and block the capillary channels, so that the overall structural compactness and surface strength of the block are improved, and the drying shrinkage and water absorption are reduced.The alkyl benzene sulfonic acid sodium in the foam stabilizer can reduce the surface tension of the slurry and promote the generation of a large number of bubbles.Nano silicon dioxide can form a rigid support framework in the bubble liquid film to prevent the bubbles from merging or breaking.Polyvinyl alcohol forms an elastic protective film on the bubble surface, prolongs the bubble life, greatly improves the block closed porosity, guarantees the light weight of the block, reduces the drying shrinkage due to the uniformity of the pores, and improves the impermeability and overall strength.

The utility model provides a kind of prestressed composite steel beam, it is related to composite steel beam technical field, the utility model includes steel frame, the steel frame is the H-shaped steel of the outer surface shape as H, the outer surface of steel frame is equipped with several threaded holes, the both sides of steel frame are provided with reinforcing device, the reinforcing device includes reinforcing plate, the outer surface of reinforcing plate is equipped with several through holes, the inner wall of through hole is slidably inserted with bolt, the inner wall of threaded hole is threadedly connected with bolt, the angle between the end of support plate away from reinforcing plate and reinforcing plate is perpendicular to each other, the utility model is connected by setting reinforcing device, reinforcing plate is adhered to the outer surface of steel frame using bolt, reinforcing plate and steel frame, reinforcing plate and support plate are installed on the outer side of steel frame, the vertical shear prestress of steel frame and the bearing capacity of core are enhanced, and different positions on the surface of steel frame can be reinforced according to the need installation in different positions of steel frame.