8results about How to "Improve even distribution" patented technology

The invention discloses an LED (light-emitting diode) packaging adhesive material and a preparation method thereof, and the LED packaging adhesive material comprises the following components in parts by weight: 100 parts of silicone oil, 1-3 parts of catalyst and 0.1-1 part of inhibitor, the silicone oil contains titanium-zirconium-containing vinyl silicone oil, hydrogen-containing silicone oil and vinyl silicone oil in a weight ratio of 1: (5-12): (2-10). According to the LED packaging adhesive material synthesized by selecting the titanium-zirconium-containing vinyl silicone oil, the hydrogen-containing silicone oil and the vinyl silicone oil with specific types and dosages, phenyl, titanium, zirconium and alkyl in the LED packaging adhesive material are high in uniform distribution degree, a formed three-dimensional network structure is compact and stable, the LED packaging adhesive material has relatively high crosslinking density, and the service life of the LED packaging adhesive material is prolonged. And the high hardness of the LED packaging adhesive material can be improved. In addition, the LED packaging adhesive material provided by the invention has high refractive index and high light transmittance.

The invention discloses a preparation method of a bamboo fiber mixed with phenolic resin molded composite material, comprising the following steps: S1, removing lignin and hemicellulose from a plurality of bamboo fibers; S2, mixing brown oligosaccharide and salt particles and evenly distributing them on the bamboo fibers; S3, spraying water on the surface of the bamboo fibers to obtain a bamboo fiber coated structure and subjecting the bamboo fibers to microwave radiation treatment, so that the generated oxygen functional groups and salt particles generate attraction, and the salt particles and brown oligosaccharide are attracted to the pores of the bamboo fibers to obtain a reinforced bamboo fiber structure; S4, soaking the reinforced bamboo fiber structure in a phenolic resin solution; S5, weaving a plurality of reinforced bamboo fiber structures into a bamboo fiber braided structure; S6, subjecting the composite material to molded curing treatment. The above preparation method subjects the bamboo fiber membrane structure to microwave radiation treatment with brown oligosaccharide and salt particles, activates the oxygen functional groups in the fibers and generates attraction with the salt particles, and further enhances the degree of fixation of the phenolic resin on the bamboo fibers.

The invention discloses a hot-melt sealant for an electric vehicle lamp and a preparation method thereof, and relates to the technical field of hot-melt sealers.The preparation method comprises the following steps that S1, raw materials needed for production of the hot-melt sealant are put into a mixing kettle according to the proportion, and the raw materials are heated and stirred through the mixing kettle so that the raw materials can form viscous glue liquid; s2, further adding a proper amount of high-temperature-resistant defoaming agent into the mixing kettle, and stirring at a constant temperature; s3, pouring the adhesive viscous liquid into a mold at a constant speed, carrying out casting molding, and curing the poured silicone sealant at room temperature; s4, the solid colloid is cut into strips, so that the solid colloid can be conveniently packaged and transported with packaging bags; according to the present invention, with the setting of the defoaming agent, the appropriate amount of the defoaming agent is added on the basis of the raw materials required by the original traditional hot-melt sealant production so as to change the foam structure in the hot-melt sealant and make the hot-melt sealant unstable, such that the foam is rapidly eliminated, and the adhesion and the stability of the hot-melt sealant are effectively improved.

The utility model relates to a barite powder modifying and activating device for drilling fluid, and belongs to the technical field of barite powder processing. The device comprises a modification mixing bin, a material dispersing mechanism and a convection mechanism, air inlet holes are formed in the side face of the modification mixing bin, and a feeding mounting pipe is arranged at the upper end; the material dispersing mechanism is composed of a material distributing assembly and a material dispersing driving part, the material distributing assembly is located in the feeding installation pipe and is driven by the material dispersing driving part to reciprocate, it is guaranteed that barite powder is evenly dispersed into the modification mixing bin, local accumulation is avoided, and it is guaranteed that particles make full contact with a modifier; the convection mechanism comprises a convection assembly and is installed in the air inlet, airflow circulation is formed by generating pushing force, the uniform distribution condition of the barite powder in the modifier is remarkably improved through combination of the material dispersing mechanism and the convection mechanism, dynamic contact between the barite powder and the modifier is promoted, interaction between the barite powder and the modifier is further enhanced, and the service life of the modifier is prolonged. The modification is more thorough and consistent, and the modification efficiency and quality are improved.

The invention discloses a forming method for improving the density of a fiber-reinforced ceramic-based composite material, and belongs to the technical field of composite material preparation. According to the method, the specific precursor mixture is selected as an impregnation matrix material and then combined with a high-temperature pressure sintering process, process parameters of different composite stages are regulated and controlled, the problem that a matrix formed by cracking of polyborosilazane in an existing process is non-uniform in distribution is solved to the maximum extent, internal defects of the material are reduced, and the performance of the material is improved. The non-uniform degree and the density of the composite material are greatly improved, and the damage degree to the fibers is reduced by reducing the number of compounding times, so that the fibers can exert better reinforcing and toughening effects, the tensile property, the bending property and other mechanical properties of the composite material are effectively improved, and finally the high-performance silicon-boron-nitrogen fiber reinforced silicon-boron-nitrogen composite material can be obtained.

The invention discloses a high-protection-level unidirectional thyristor electrostatic protection device, comprising a P-type substrate; a first N-type deep well and a second N-type deep well are arranged in the substrate; a P-well is arranged on the right side of the second N-type deep well; a first P+ injection area and a first N+ injection area are arranged in the first N-type deep well; a second P+ injection area and a second N+ injection area are arranged in the second N-type deep well; a fourth N+ injection area connected across is arranged between the first N-type deep well and the second N-type deep well; a third P+ injection area and a third N+ injection area are arranged in the P-well; the first P+ injection area, the first N+ injection area, the second P+ injection area and the second N+ injection area are connected together and serve as the anode of the device, and the third P+ injection area and the third N+ injection area are connected together and serve as the cathode of the device.

The invention discloses an ammonia spraying and mixing unit, which is applied to a dust-free flue gas denitration system and is mounted in a flue, and comprises a main pipe, which is arranged in the flue in a direction vertical to the flow direction of flue gas and is used for introducing ammonia gas or ammonia-air mixed gas; the plurality of branch pipes are communicated with the main pipe and extend along the flue gas direction; the free end of the branch pipe is sleeved with a bearing, one end of the bearing is fixedly connected with the branch pipe, and the other end of the bearing is connected with a hollow rotating shaft which is communicated with the branch pipe. The distribution pipes are arranged on the hollow rotating shaft and are in a communicated state, and the distribution pipes are uniformly distributed in the circumferential direction of the hollow rotating shaft; a plurality of ammonia gas spraying holes are formed in the distribution pipe; a certain included angle is formed between the spraying direction of the ammonia gas spraying holes and the flue gas flow direction; and the rotational flow blade is fixedly connected to the middle part of the branch pipe in the flue and is used for converting axial airflow into radial rotational airflow in the mixing process of the flue gas and the ammonia gas. The invention is suitable for the flue gas denitration device with lower allowable installation height and no dust or lower dust amount in the denitration transformation of the old boiler.

The application discloses a high-voltage switch cabinet based on a modular structure, which has a cabinet body and an external pipe extending from the cabinet body, an instrument room, a handcart room, a busbar room and a cable room are arranged in the cabinet body, an instrument for measurement is arranged in the instrument room, a handcart is arranged in the handcart room, a contact box is arranged in the interior of the cabinet body, the upper contact box is connected with a busbar connecting piece through a busbar, the lower contact box is connected with a current-voltage transformer, a non-flat partition plate is arranged between the busbar room and the cable room, a handcart room cover plate, a busbar room cover plate and a cable room cover plate are arranged above the handcart room, the busbar room and the cable room respectively, a cover plate joint piece which is not integrated with the cover plate is arranged on the handcart room cover plate, the busbar room cover plate and the cable room cover plate, and the safety of the high-voltage switch cabinet is improved.