7results about How to "Improve pull strength" patented technology

The application provides a kind of composite modified asphalt with anti-ultraviolet and anti-salt corrosion aging and a preparation method thereof, and the preparation raw materials include base asphalt, linear SBS, GN, LDHs-PABA-CA, a compatibilizer and a stabilizer.The base asphalt is heated to a molten state to obtain molten asphalt.Under the condition of constant temperature heating and continuous stirring, linear SBS is added to the molten asphalt to make linear SBS swell in the molten asphalt, and then shear mixing is carried out to obtain SBS composite modified asphalt.GN and LDHs-PABA-CA are added to the SBS composite modified asphalt and stirred uniformly, and shear mixing is continued to obtain a composite modified asphalt base with anti-ultraviolet and anti-salt corrosion aging.A compatibilizer and a stabilizer are added to the composite modified asphalt base with anti-ultraviolet and anti-salt corrosion aging, and then the mixed system is stirred under constant temperature conditions to obtain a composite modified asphalt with anti-ultraviolet and anti-salt corrosion aging.

The present application relates to a kind of preparation methods of coating material, in particular to a kind of preparation methods of neodymium iron boron nano coating material.It includes the following steps: substrate pretreatment;Coating preparation: spray preparation nano coating, the binder of nano coating belongs to silicon-titanium modified polymer system, coating thickness is controlled at 20-25 μm, curing process: 50-70 ℃ surface dry 5-20 min, 160-200 ℃ baking and curing 40-60 min;Coating plasma treatment: plasma treatment 2-4 times.The present application nano gray coating can significantly improve surface tension after plasma treatment, the durability of coating surface tension treated under the condition that air is gas source is obviously superior to nitrogen, surface tension is still above 50 mN / m after room temperature is placed and naturally aged 6 months;After coating surface plasma treatment, drawing strength is also improved simultaneously.

The present invention provides a power cable and a manufacturing method thereof, which suppresses a gap between a sheath layer and an insulation layer and improves a tensile strength on an inner side than the sheath layer. The power cable has: (a) a core having a conductor (2) and an insulation layer (4) on an outer periphery thereof; and (b) a sheath layer (9) formed on an outer periphery of the core, and has the following configuration. The sheath layer is formed of a resin composition containing a base polymer, a silane coupling agent, and a peroxide, the content of the silane coupling agent is 2 parts by mass or more, and the content of the peroxide is 4 parts by mass or more, with respect to 100 parts by mass of the base polymer, and the tensile strength on the inner side than the sheath layer is 10 kgf or more. By adding the silane coupling agent and the peroxide as cross-linking agents within the range, cross-linking can be performed at a lower temperature, a gap between the insulation layer and the sheath layer can be suppressed, and the tensile strength can be ensured even in a case where the insulation layer is thick and the linear expansion coefficient is large and the influence of thermal expansion and contraction is large.

The present application relates to a kind of emulsified rubber asphalt material and its preparation method, the emulsified rubber asphalt material includes composite colloidal particle modified asphalt and emulsified soap solution, composite colloidal particle modified asphalt in emulsified rubber asphalt material The weight ratio is 40-60%;The preparation method of the composite colloidal particle modified asphalt is: first, low mooney reclaimed rubber is prepared, then low mooney reclaimed rubber and SBS, maleic anhydride are melt blended in closed mill, and composite colloidal particle is prepared by screw extrusion granulation, then composite colloidal particle is added to matrix asphalt, and then rubber oil is added to obtain;The emulsified soap solution is composed of compound cationic emulsifier, self-emulsifying waterborne epoxy resin, stabilizer, pH regulator and deionized water.The emulsified rubber asphalt material prepared by the present application has high emulsification stability, significant high-temperature deformation resistance, low-temperature crack resistance and durability advantage.

The utility model discloses a PIN connecting structure for an electromagnetic valve, which comprises a circuit board, the circuit board is connected with PINs through tin soldering, an electromagnetic valve coil framework is arranged below the PINs, the upper surface of the electromagnetic valve coil framework is provided with PIN mounting grooves, and the lower ends of the PINs are inserted into the PIN mounting grooves. The V-shaped soldering lug used for electric resistance welding is designed in the middle of the PIN, connection between the electromagnetic valve PIN and a copper wire is achieved through electric resistance welding, and compared with tin soldering, the technological process is simplified; the pin of the electromagnetic valve PIN is of a corrugated structure and is connected with the coil framework through a buckle, so that the connection reliability is improved; in addition, gluing treatment can be carried out during connection, and the drawing strength is improved while the connection reliability is improved.

The application discloses an electrode rod welding structure and a manufacturing method, and belongs to the technical field of welding structure of electrode rod. The electrode rod welding structure comprises a ceramic electrode base, an electrode assembly and a threaded sleeve. The ceramic electrode base is provided with a threaded hole, and the bottom of the threaded hole is provided with a first assembly part. One end of the electrode assembly is provided with a second assembly part. The electrode assembly is installed in the threaded hole, and the second assembly part is installed in cooperation with the first assembly part. The outer circumferential side of the electrode assembly is formed with a first step part and a welding wire groove. The first step part is located between the second assembly part and the welding wire groove. The welding wire groove is used for placing a welding wire. The threaded sleeve is in a hollow structure. The inner side wall of the threaded sleeve is formed with a second step part matched with the first step part. The threaded sleeve is sleeved on the outer circumferential side of the electrode assembly, and the threaded sleeve is threadedly connected with the threaded hole, so that the electrode assembly is locked in the threaded hole. The application reduces the risk of cracking of the ceramic electrode base, has good sealing air tightness, and is not easy to be de-welded.

The invention relates to the technical field of geosynthetic materials, in particular to an earthwork standard room node connecting structure and a method thereof.The earthwork standard room node connecting structure comprises a belt body and two fasteners buckled with each other, each fastener is provided with a boss and a groove, each groove is sequentially provided with a melting cavity and a negative pressure cavity from top to bottom, and a pre-sealed fusible flow choking film is arranged between the two cavities; and the bottom of the melting cavity laterally extends to form an expansion cavity. And in an ultrasonic welding state, the end part of the boss is heated and melted and instantly burns through the fusible choked flow film, so that the negative pressure cavity in a sealed state is instantly communicated. The generated negative pressure suction effect is utilized to actively counteract repulsive force generated by thermal expansion of plastic, and the two fasteners are driven to be continuously and tightly attached. And meanwhile, the high-viscosity molten material is strongly guided by negative pressure to transversely flow into dead corners of the expansion cavity, and a seamless T-shaped physical locking structure is formed after cooling. According to the method, the problems that traditional ultrasonic welding is prone to rebound and seam disengaging, and undercut filling is not full are thoroughly solved, and the anti-drawing strength and the anti-stripping strength of the joint are greatly improved.