43results about How to "Reduce filling" patented technology

The invention provides an excitation fuse with a tubular structure, which comprises a closed insulating shell, and a first connecting end and a second connecting end are arranged at two ends of the insulating shell; a closed cavity is formed in the insulating shell, a movable block and two limiting parts with conductive performance are arranged in the closed cavity, a limiting gap is formed between the two limiting parts, and the two limiting parts are electrically connected with the first connecting end and the second connecting end respectively; the movable block comprises a first end and a second end which are opposite, and the first end is provided with an excitation source; the two sides of the second end are in tight fit connection with the two sides of the limiting gap respectively, and the two limiting parts are in conductive connection through the second end; a receding space is formed between the second end and the inner wall of the closed cavity. According to the tubular structure excitation fuse with the structure, the filling amount of an excitation source can be effectively reduced, and the design difficulty of the insulating shell is reduced; in addition, the melt part is compact in overall structure and convenient to use in occasions with strict space requirements.

The invention provides silicone rubber for a composite insulator and a preparation method of the silicone rubber for the composite insulator. The silicone rubber composition is prepared from the following raw materials in parts by weight: 20 to 80 parts of first methyl vinyl silicone rubber raw rubber, 10 to 50 parts of second methyl vinyl silicone rubber raw rubber, 20 to 60 parts of white carbon black, 1 to 15 parts of hydroxyl silicone oil, 80 to 120 parts of aluminum hydroxide, 1 to 10 parts of P-N-Si tracking-resistant auxiliary agent, 0.1 to 2.2 parts of first silane coupling agent, 1 to 4 parts of dimethyl silicone oil and 0.01 to 1 part of release agent. The preparation raw materials of the P-N-Si tracking resistant auxiliary agent comprise a second silane coupling agent, phytic acid and melamine, the aluminum hydroxide is silane modified aluminum hydroxide, and the particle size D50 of the aluminum hydroxide is 1-5 [mu] m. Through cooperation of the P-N-Si anti-tracking auxiliary agent and the silane modified aluminum hydroxide, the filling amount of the aluminum hydroxide can be reduced while the anti-tracking performance of the composite insulator silicon rubber is improved, and the problems of processability and poor mechanical performance are effectively solved.

The invention provides a welding method of a box beam, a bogie frame and a railway vehicle. The welding method comprises the steps that the groove angle, the truncated edge length and the gap of a to-be-welded position are determined, and the dry extension length of a welding wire is determined; the angle of the groove is not higher than 45 degrees; sequentially forming a backing welding layer and a cosmetic welding layer at an outer side welding seam between the vertical plate and the lower cover plate through a deep penetration welding process; a cosmetic welding layer is formed at the inner side welding seam between the vertical plate and the lower cover plate through a deep penetration welding process, and a backing welding layer and a cosmetic welding layer are sequentially formed at the outer side welding seam; forming a backing weld layer and a cosmetic weld layer at the butt weld between the two vertical plates through a deep penetration welding process; the bogie frame is machined through the welding method, and the railway vehicle comprises the bogie frame. According to the welding method of the box beam, the bogie frame and the railway vehicle, the machining time can be saved, the assembling difficulty is reduced, raw material waste is avoided, and the welding efficiency and the welding seam quality are improved.

The invention belongs to the field of artificial intelligence and financial science and technology, and relates to a dynamic form generation method, which comprises the following steps: preprocessing unstructured text data requested by a client form to obtain preprocessed text data; inputting the preprocessed text data into an intention recognition model to obtain an intention category; form keywords are selected according to the weights, and the incidence relation of the form keywords is obtained; retrieving a candidate record set from historical query records according to the form keyword; calculating probability distribution of the candidate record set by adopting a maximum entropy model to obtain a prediction probability; according to the prediction probability, determining a candidate record most related to the client form request as a form generation reference knowledge base; and generating a personalized form based on the form generation reference knowledge base. The invention further provides a dynamic form generation device, computer equipment and a storage medium. In addition, the invention further relates to a block chain technology, and historical query records can be stored in a block chain. According to the invention, personalized services can be provided, the business process is simplified, and the error rate is reduced.

The invention provides a self-adaptive welding method for a bracket special for a freeze-drying barrel, and belongs to the field of laser welding. The self-adaptive welding method for the support special for the freeze-drying barrel comprises the steps of assembling the self-adaptive welding system for the support of the freeze-drying barrel, calculating the variable quantity of a welding gap, setting the range of the welding gap, selecting the diameter of a welding wire, installing a workpiece, adjusting the gap and starting welding. The non-uniform gap interface self-adaptive welding system comprises a rotating assembly, a pressing assembly, a workbench, a multi-axis moving device, a laser filler wire welding system, a visual inspection system and a control system. The size of a welding connector gap between a freeze-drying barrel and a support is detected in real time through a visual detection sensor, the moving speed of a multi-axis moving device is adjusted in real time, and a laser welding gun of a laser wire filling welding system is driven to achieve the welding speed self-adaptive welding process, so that wire filling and heat input at different positions of a welding connector are matched with the size of the gap, and the welding speed self-adaptive welding effect is achieved. A stable and reliable welding seam is obtained through one-time welding of a non-uniform gap connector.

The invention relates to a 1500MPa deep sea steel welding material with the thickness larger than 30mm and a welding method of the 1500MPa deep sea steel welding material. The welding wire is prepared from, by mass, 0.08%-0.13% of C, 1.2%-1.6% of Mn, 0.3%-0.6% of Si, smaller than or equal to 0.002% of S, smaller than or equal to 0.005% of P, 4.5%-8.5% of Ni, 5%-11% of Co, 0.1%-0.3% of Mo, 0.1%-0.3% of Cr, 0.05%-0.08% of Ti and the balance Fe and inevitable impurities. The welding method comprises the steps of designing a groove, machining the groove, and confirming an assembly gap of a welding joint based on the thickness of a steel plate; in the welding process, high-pressure gas cools the surface of a weld joint on line; after one welding seam is completed and the temperature of the welding seam is monitored to reach a preset value, laser remelting treatment is started; and after the welding seam is subjected to laser remelting treatment and the temperature of the welding seam is monitored to reach a preset value, next welding work is carried out, and after one welding seam is welded, welding continues according to the process till the whole welding work is finished.

The invention relates to the technical field of offshore wind power generation pipe pile manufacturing, in particular to a welding method of an offshore wind power large and thick steel plate barrel, which comprises the steps of beveling, barrel rolling, preheating, positioned welding, backing welding, inner groove welding, carbon arc air gouging back gouging and outer groove welding. Flame cutting is matched with mechanical milling to manufacture a semi-narrow gap groove, the sectional area of the groove is improved, the semi-narrow gap submerged arc automatic welding process is achieved, and the welding efficiency is improved. Due to the V + U-shaped design of the inner groove, the good fusion ratio of the root is guaranteed, and the defects of incomplete penetration and hot cracks of the root are reduced; and the back gouging depth of an outer side welding seam is reduced, the labor intensity of an operator is reduced, the mechanization degree is improved, carbonization of a base metal groove is reduced, and the internal welding quality is improved. The V + U-shaped groove form is easy to weld, the groove is regular, and the appearance is attractive; compared with a traditional V-shaped groove, the angle of the V + U-shaped groove is smaller, the filling amount of welding materials is reduced, and the production cost is saved.

The utility model discloses a carbon dioxide combined dehydration system, which relates to the field of carbon dioxide dehydration and comprises a dehydration line of a filter separator, a freezing dryer, a first separator, a dehydration tower and an outlet filter which are sequentially connected. The regeneration line is connected to the output end of the dehydration line and is communicated with a compressor; the compressor is communicated with a cold medium inlet of a heat exchanger; a hot medium outlet of the heat exchanger is communicated with a heater; the heater is communicated with a bottom inlet of a regeneration tower; and the condenser is connected with the second separator. The dehydration mode that low-temperature pre-cooling is conducted firstly, separation is conducted firstly, and then fine dehydration is conducted is adopted, the dehydration depth is higher, regenerated gas is taken from dehydrated purified gas, and the drying capacity is higher.

The invention belongs to the technical field of conductive adhesives, and particularly relates to an ultralow-hardness silver-copper conductive adhesive and a preparation method thereof. The ultralow-hardness silver-copper conductive adhesive comprises the following components in parts by weight: 50-100 parts of liquid silicone rubber, 30-80 parts of a diluent, 1-10 parts of a chain extender, 0.1-5 parts of a heat-resistant agent, 0.1-5 parts of a coupling agent, 0.1-5 parts of an inhibitor and 100-400 parts of conductive filler. The shielding performance of the ultralow-hardness silver-copper conductive adhesive can reach 100 dB, the tensile strength is larger than 1 Mpa, the volume resistivity is smaller than 0.005 ohm.cm, and the hardness is smaller than 30 ShoreA. On the premise that the requirements of products for mechanical strength and shielding effectiveness are met, the ultralow-hardness silver-copper conductive adhesive has lower product hardness, the internal stress of the adhesive to electronic components is greatly reduced, and market requirements are met.

The invention discloses a preparation method of a multilayer sphere-like composite wave-absorbing material, and the preparation method comprises the following steps: (1) adding nickel nitrate hexahydrate, trimesic acid and polyvinylpyrrolidone into a solvent, and mixing to prepare a mixed solution; (2) transferring the mixed solution into a polytetrafluoroethylene lining reaction kettle for reaction to prepare a spherical Ni-MOF material; (3) the spherical Ni-MOF material and the Ti < 3 > C < 2 > T < X > powder are mixed, and Ni-MOF / Ti < 3 > C < 2 > T < X > mixed powder is prepared; and (4) the Ni-MOF / Ti3C2TX mixed powder and melamine are mixed, melamine mixed powder is prepared, the melamine mixed powder is transferred into a tubular furnace to be sintered, and a finished product is prepared. When the thickness of the prepared wave-absorbing composite material is 1.75 mm, RLmin is-65.1 dB, and the effective absorption frequency band is as high as 6.50 GHz.

The adsorbent according to the present disclosure is a adsorbent for removing an adsorbate from a moisture-containing gas that is a gas containing moisture and the adsorbate, and is characterized in that the adsorbent contains a metal-organic structure that contains at least one metal ion selected from the group consisting of aluminum ions, iron ions, and copper ions, trimesic acid, and an aromatic carboxylic acid compound. The aromatic carboxylic acid compound is a benzoic acid compound represented by formula (1) or an isophthalic acid compound represented by formula (2). R in the formula (1) and the formula (2) is any one of a methyl group, a fluoro group, a chlorine group, an iodo group and a bromo group. # imgabs0 #

A novel plate heat exchanger absorption chiller belongs to the field of heat exchange equipment technology. It employs a two-stage low-temperature heat return system, a refrigerant plate heat exchanger, and a first-stage low-temperature heat return system connected in series and in parallel with the low-temperature heat exchanger. A dilute solution is heated by heat from the shell side and collected before entering the plate low-temperature regenerator. In the plate low-temperature regenerator, it is heated by high-temperature refrigerant vapor from the plate high-temperature regenerator, concentrating it into an intermediate concentration solution. This intermediate concentration solution is then pumped through an intermediate liquid pump, exchanging heat with the high-temperature heat exchanger and the parallel high-temperature heat return system, before entering the plate high-temperature regenerator. There, it is heated by external steam to generate refrigerant vapor, concentrating it into a high-concentration absorbent. Finally, it returns to the absorber to absorb refrigerant vapor generated from evaporation in the evaporator, diluting it into a dilute solution. This invention effectively reduces the overall solution filling volume and unit cost, significantly improves the unit's heat exchange efficiency, effectively stabilizes the liquid level, ensures stable unit operation, and enhances the unit's operational safety.

The present application belongs to welding process, and particularly relates to a narrow-gap all-position TIG automatic welding process. The narrow-gap all-position TIG automatic welding process comprises the following steps: 1) performing backing welding on a root bevel and a bottom of the bevel; 2) performing filling welding on a lower bevel and a groove, wherein the filling welding is single-layer multi-pass welding; and 3) performing covering welding on a top of the groove, wherein the covering welding adopts linear welding or oscillating welding. The present application has the following beneficial effects compared with the prior art: the groove of the narrow-gap automatic welding process is narrow, the filling amount of the welding deposited metal is small, and the welding cost is relatively low. The weld is lossless, and the pass rate of the physical and chemical detection is relatively high.

A desulfurizing agent according to the present disclosure is a desulfurizing agent for removing a sulfur compound from a raw material gas containing the sulfur compound, the desulfurizing agent containing a metal-organic structure containing copper ions, trimesic acid, and a benzoic acid compound, the benzoic acid compound is a compound obtained by substituting a hydrogen atom, which is meta-or para-position relative to a carboxyl group, of benzoic acid with a substituent, and the electron donating property of the benzoic acid compound is higher than that of benzoic acid.

The utility model provides a hub bearing, and particularly relates to the field of bearings. The hub bearing comprises a hub shell and a bearing body installed in the hub shell, the bearing body comprises a bearing inner ring and a bearing outer ring, and a step for positioning the bearing outer ring is arranged on the hub shell. The hub bearing further comprises a first sealing piece and a second sealing piece, the first sealing piece is fixedly connected with the step, and the first sealing piece and the bearing are coaxially arranged. The second sealing piece is fixed with the inner ring of the bearing and is coaxially arranged with the bearing; the first sealing piece and the second sealing piece form a labyrinth sealing structure used for preventing lubricating grease from flowing out of the bearing. When the hub bearing is used, the filling amount of the lubricating grease is reduced, the utilization rate of the lubricating grease can be increased, the maintenance time of a vehicle is prolonged, and the whole hidden danger can be effectively reduced.

Provided is equipment 6 for winding a filling rod TR, the winding equipment 6 continuously wrapping a flavor raw ingredient in rollable paper P while molding the flavor raw ingredient into a filler B through a process for transporting the flavor raw ingredient together with the rollable paper P along a transport path 4, wherein: the winding equipment 6 comprises a garniture tape 8 that travels along the transport path 4, and a molding bed 10 having a molding groove 14 in which the garniture tape 8 travels; the rollable paper P is supported on the garniture tape 8 and travels in the molding groove 14 together with the garniture tape 8; the filler B is supported on the rollable paper P, and is continuously wrapped in the rollable paper P via the garniture tape 8 traveling in the molding groove 14 and is molded into the filling rod TR; the molding bed 10 has a suction chamber 32 for suctioning a groove space 30 in the molding groove 14; and the garniture tape 8 has a suction hole 36 opened therein and applies suction force from the suction chamber 23 to the rollable paper P via the suction hole 36.

The invention discloses a carbon-based reinforced heat-conducting high-viscosity shaped phase-change material as well as a preparation method and application thereof. The carbon-based reinforced heat-conducting high-viscosity shaped phase-change material comprises the following components in parts by weight: 20-60 parts of a basic phase-change material, 1-30 parts of a polymeric elastomer, 1-25 parts of a tackifying material, 0.1-0.2 part of an antioxidant, 1-3 parts of a coupling agent and 5-30 parts of carbon-based heat-conducting particles. The carbon-based filler reinforced heat-conducting high-viscosity shaped phase change material prepared by the invention has the advantages of high initial viscosity, flexibility, heat resistance, shape stability, low filling amount and the like, overcomes the defect that the characteristics of the current phase change material cannot be combined, and can be applied to heat-conducting interface materials of electronic components, such as heat dissipation of a CPU (Central Processing Unit), a GPU (Graphic Processing Unit) and the like, heat management of a battery and the like. Flexible wearable equipment thermal management and the like.

The invention discloses high-conductivity silicone rubber with excellent processability and a preparation method thereof, and relates to the technical field of rubber materials, the high-conductivity silicone rubber comprises the following components by weight: 20-40 parts of raw rubber, 50-60 parts of a conductive filler, 5-15 parts of white carbon black, 1.5 parts of a structured control agent, 1.04 parts of a silane coupling agent, 0.05 part of a release agent, and 3 parts of a vulcanizing agent. The raw rubber is compounded by two or three different methyl vinyl silicone rubber, and the conductive filler is one or more of nickel-coated iron, nickel-coated graphite and furnace black. According to the high-conductivity silicone rubber with excellent processability and the preparation method thereof, the nickel-coated graphite and the furnace black are compounded for use, so that target resistance can be achieved with a smaller dosage, and the high-conductivity silicone rubber has the characteristics of small dosage of the conductive filler, low specific gravity and low cost.

The invention provides a multi-energy-field composite welding method and device for enhancing penetration of a super-thick plate. The multi-energy-field composite welding method for enhancing penetration of the super-thick plate comprises the following steps that a plasma environment is constructed in a Y-shaped groove structure through a laser heat source, and the Y-shaped groove structure is arranged at the butt joint position of two to-be-welded plate bodies; a laser heat source and a plasma environment jointly act on an electric arc heat source, so that the electric arc heat source forms a long electric arc, and the long electric arc at least can reach the bottom of the Y-shaped groove structure. According to the method, a long electric arc is induced under the combined action of a laser heat source and a plasma environment, so that the long electric arc can deeply act on the bottom of a Y-shaped groove structure, single-side welding and double-side forming are realized, the defects of difficulty in penetration of a welding groove and difficulty in penetration of the root of the butt joint of the super-thick plate in traditional arc welding and laser arc welding are effectively overcome, and the welding quality is improved. The advantages of deep penetration of a welding groove, high penetration capacity, low filling amount, small welding seam deformation and the like are achieved, and the welding stability is effectively improved.

The utility model discloses a VPSA technology oxygenerator, including main air inlet, compressor, solenoid valve, molecular sieve bucket no. 1, molecular sieve bucket no. 2, communication valve and air reservoir, through setting up two molecular sieve bucket, when air flows into one of molecular sieve bucket through the communication pipe, the nitrogen that passes through the molecular sieve bucket is adsorbed, oxygen flows into the air reservoir, and the oxygen is absorbed by the molecular sieve bucket. Meanwhile, nitrogen in the other molecular sieve barrel is pumped out through a negative pressure air inlet of the compressor to be vacuumized, the two molecular sieve barrels are communicated by opening the communicating valve, a small part of oxygen in the other molecular sieve barrel can be pumped into the molecular sieve barrel with air to further blow out the nitrogen, the communicating valve is closed again, the nitrogen is exhausted thoroughly, and almost no nitrogen is left; the utilization rate of the molecular sieve is improved, the required filling amount of the molecular sieve is obviously reduced, the single flow in the device is small, the pressure in the system is small, the service life of the molecular sieve can be effectively prolonged, the power demand of the compressor is small, and the noise of the product is low.

An ultrasonic probe with a coupling liquid compensation function, wherein a compensating member (3) is built into a receiving chamber (11), and the compensating chamber (31) is located in the receiving chamber (11) and is sealed and separated from each other. The gas inlet and outlet (32) of the compensating chamber (31) are openly arranged so that it can be connected to the outside, thereby ensuring that the gas in the compensating chamber (31) has the same pressure as the outside. The compensating member (3) is at least partially made of a deformable flexible material, and the coupling liquid is filled in the receiving chamber (11) and also acts on the outer wall of the flexible material of the compensating member (3). When the coupling liquid pressure changes, the flexible material of the compensating member (3) can be deformed, thereby adjusting the coupling liquid pressure by changing the storage space of the coupling liquid. The compensating member (3) is built into the receiving chamber (11), and the compensating member (3) itself occupies a part of the space of the receiving chamber (11), thereby reducing the amount of coupling liquid filled, and the compensating member (3) built into the receiving chamber (11) does not increase the overall volume of the probe, making the ultrasonic probe more compact and more conducive to miniaturization design.

The utility model relates to the technical field of cables, aims at solving the technical problems that some existing communication cables are too large in outer diameter and high in construction difficulty, and provides a communication cable which comprises a plurality of neutral lines, a plurality of wires and a reinforcing piece, and the plurality of neutral lines and the plurality of wires are twisted around the reinforcing piece in a star quad mode. The number of the neutral lines is an even number and is larger than or equal to four, the number of the wires is an even number and is larger than or equal to four, one neutral line is arranged between every two adjacent wires, and every two opposite wires form a communication group. The neutral line has a first outer diameter, the lead has a second outer diameter, and the first outer diameter is smaller than the second outer diameter. The beneficial effects of the utility model are that the external diameter and the installation difficulty of the communication cable are reduced.

A film forming method of forming a film made of a curable composition, includes an arranging step of arranging the curable composition on an underlayer of a substrate including a base member and the underlayer arranged on the base member, a contact step of bringing the curable composition and a mold into contact with each other after the arranging step, a curing step of curing the curable composition after the contact step, and a separation step of separating the curable composition and the mold after the curing step, wherein a gas filling a space between the underlayer and the mold exists in the contact step, and a solubility coefficient of the gas with respect to the underlayer is 0.5 kg / m3•atm or more and 10 kg / m3•atm or less.

The invention belongs to the technical field of welding, and particularly relates to an oil and gas pipeline TIG automatic welding narrow gap welding method and application thereof. The method at least comprises root welding, wherein an ER80S-G solid welding wire is adopted for root welding; root welding is conducted through TIG welding; and a narrow-gap groove is adopted for root welding. According to the technical scheme, the welding efficiency can be greatly improved to meet the requirement for large-scale pipeline construction, high-quality welding seams are guaranteed to enhance the safety and reliability of the pipeline, the welding material cost is saved through the narrow-gap groove form, the labor intensity of welders is relieved, high-performance steel such as X80 pipeline steel is well matched, and high-quality safe operation of the pipeline is guaranteed.

The invention relates to the technical field of fish scale pattern welding, in particular to a fish scale pattern welding control method. Comprising a plurality of welding periods which are continuously carried out, the welding periods are added into an arc stabilizing stage, and the arc stabilizing stage comprises a first stage, a second stage, a third stage and a fourth stage which are sequentially carried out. Periodic welding control is carried out, an arc stabilizing stage is added in each welding period, and welding wires can stay in a molten pool for a certain time in the arc stabilizing stage of each welding period so as to calm the molten pool. Therefore, in the whole welding process, the molten pool can be killed discontinuously, so that the molten pool keeps good stability continuously, and the purpose of improving the fish scale pattern welding quality is achieved.

The utility model discloses a three -phase five -column voltage transformer relates to electric power measuring equipment technical field, including main insulator adopts epoxy resin vacuum casting forming, and its inside is formed with resin -coil integrated structure, five -column structure sets up in the inside of main insulator, including A, B, C three -phase body and zero sequence body, wherein A, B, C three -phase body is arranged in the front of five -column structure, and zero sequence body is arranged in the rear of five -column structure, A, B, C three -phase iron core is correspondingly embedded in A, B, C three -phase body inside respectively, and every phase iron core is connected with corresponding phase resin -coil integrated structure, and the european C -shaped joint is along the lateral parallel distribution in the top of A, B, C three -phase iron core, is integrated in the top of main insulator. The application introduces five -column type iron core structure, provides low magnetic resistance loop for zero sequence magnetic flux. Possesses the comprehensive advantage such as high measurement accuracy, good functional integration, stable and reliable operation, compact structure and good economy.

The invention discloses a high-flexibility energy storage cable and a preparation method thereof, and the preparation method comprises the following steps: modifying nano white carbon black, compounding with magnesium-aluminum double hydroxide, and compounding with modified boron carbide in an organic solvent to obtain a flame-retardant modifier; extruding a flame-retardant modifier, natural rubber, silicone rubber, an anti-aging agent, tackifying resin, a vulcanizing agent and a vulcanization accelerator through a twin-screw extruder, granulating to serve as protective sleeve layer granules, and performing a non-crosslinking three-layer co-extrusion method on the protective sleeve layer granules, a conductor and a conductor shielding layer to obtain the high-flexibility energy storage cable. According to the high-flexibility energy storage cable prepared by the invention, the flame retardant modifier is formed by compounding the flame retardant and is uniformly dispersed in the rubber protection layer of the energy storage cable, so that the flame retardance of the energy storage cable is improved, meanwhile, the heat conductivity of the energy storage cable is greatly improved due to the high heat conductivity of the flame retardant modifier, the heat accumulation of the energy storage cable is reduced, and the service life of the energy storage cable is prolonged. The degree of thermo-oxidative aging effect is reduced, the filling amount of the filler and the flame retardant is reduced, and the flexibility of the energy storage cable is improved.

A longitudinal coupling acoustic filter relates to a film radio frequency acoustic wave filter. Comprising a coupling layer and two piezoelectric transduction structure layers arranged above and below the coupling layer. The piezoelectric transduction structure layer sequentially comprises a first electrode layer, a piezoelectric layer and a second electrode layer from top to bottom, and the second electrode layer of the piezoelectric transduction structure located above the coupling layer and the first electrode layer of the piezoelectric transduction structure located below the coupling layer are jointly grounded; the coupling layer comprises a plurality of cavity parts and supporting parts, the plurality of cavity parts are arranged in an array, and the plurality of supporting parts form a grid structure. The coupling layer composed of the cavity part and the supporting part is adopted, the air filling amount is effectively reduced, the acoustic impedance of the coupling layer is weakened, acoustic connection of the piezoelectric transduction structures at the upper end and the lower end is affected, and then stray generated near a pass band is restrained.

The utility model discloses an anti-scratch backlight FPC structure which comprises a backlight module, the backlight module comprises shading glue and a backlight FPC, one end, facing the backlight FPC, of the shading glue extends to a front single-layer area of the backlight FPC, and the shading glue on the single-layer area is provided with a reinforcing structure for preventing scratch. The size of the reinforcing structure is equal to that of the single-layer area. The shading glue on the front face of the backlight extends to the single-layer area of the backlight FPC, a non-sticky PET film is additionally arranged at the upper end, the thickness of the PET film is 1-2 microns, the added shading glue and the PET film body are soft, the bending performance of the backlight FPC in the single-layer area is not affected, the tearing risk of the backlight FPC can be reduced, the problems of surface scratching and the like of the single-layer area of the backlight FPC can be avoided, and the service life of the backlight FPC is prolonged. The FPC can be prevented from being torn only by laying a layer of copper plate on the single-layer area, and the copper plate is in a grid shape and is composed of copper wires in the staggered direction, so that the copper filling amount can be reduced, the flexibility of the copper laying area is improved, and the production cost is saved.

This invention relates to the field of polymer materials technology, specifically disclosing a halogen-free flame-retardant unsaturated polyester resin material for energy storage battery casings and its preparation method. The halogen-free flame-retardant unsaturated polyester resin material for energy storage battery casings comprises the following components by weight: 35-45 parts unsaturated dicarboxylic acid, 15-30 parts polymeric polyol, 15-25 parts small molecule diol, 35-45 parts styrene, 15-25 parts phosphorus-nitrogen-silicon modified aluminum hydroxide, 8-15 parts organic phosphinate, 0.5-2 parts organometallic catalyst, 0.01-1 part polymerization inhibitor, and 1.2-2.0 parts curing agent. The phosphorus-nitrogen-silicon modified aluminum hydroxide and organic phosphinate are compounded to construct a synergistic halogen-free flame-retardant system. The two work synergistically to improve the flame-retardant effect under halogen-free conditions, while simultaneously suppressing smoke, meeting the fire safety requirements of energy storage battery casings.