2791 results about "Hot melt" patented technology

The invention discloses a frozen soil roadbed hot melt settlement laser scanning measurement method and system, and relates to the technical field of measurement, the method comprises the following steps: obtaining gridding surface data, and obtaining an elevation data sequence of each grid point; acquiring an elevation change index of each grid point according to the elevation data sequence of each grid point; acquiring a plurality of grid points adjacent to the ith grid point and taking the plurality of grid points as a plurality of reference grid points of the ith grid point, acquiring each relative difference quantity of the ith grid point, and acquiring a correction proportion of the ith grid point according to the plurality of relative difference quantities of the ith grid point; and obtaining target elevation data of each grid point according to the correction proportion of each grid point and the measured elevation data at the current moment, and forming a measurement result including the gridding surface data according to the target elevation data of each grid point. The method has the advantages of identifying abnormal values, dynamically correcting measurement and improving data reliability.

The invention provides a waterproof and windproof warm-keeping fabric and a production process thereof, and relates to the technical field of textile fabrics, the waterproof and windproof warm-keeping fabric comprises a protective surface layer, a windproof temperature-locking middle layer and a skin-friendly warm-keeping inner layer which are sequentially arranged from outside to inside, and the three layers are compounded through a gradient hot melt adhesive; the protective surface layer is a graphene oxide modified polyester fiber fabric treated by a composite hydrophobic finishing liquid; the windproof temperature-locking middle layer sequentially comprises a non-swelling environment-friendly TPU film, a polytetrafluoroethylene microporous film and a Cs0. 33WO3 modified PA6 / 66 hollow fiber net from outside to inside, and the three are laminated and compounded into an integrated structure through hot pressing; and the skin-friendly warm-keeping inner layer is a bamboo pulp fiber-cotton-skin-friendly antibacterial polyester fiber blended fabric loaded with phase change microcapsules. The fabric disclosed by the invention integrates excellent waterproof, windproof and warm-keeping properties, is suitable for outdoor and cold-proof clothes, and has both functions and comfort.

The invention relates to the technical field of composite pipe machining equipment, and provides a winding device and technology for large-diameter water supply pipe production, the winding device is used for winding a glass fiber belt on the outer wall of a pipe body, the winding device comprises a rack, a moving platform, a pressing wheel and a hot air pipe, the pipe body is rotationally arranged on the rack, the moving platform is movably arranged on the rack, and the hot air pipe is arranged on the rack. The moving platform is located on one side of the pipe body, the moving direction of the moving platform is parallel to the rotating axial direction of the pipe body, the pressing wheel is rotationally arranged on the moving platform and is opposite to the rotating direction of the pipe body, the glass fiber belt is coated with bonding materials, a gap is reserved between the pressing wheel and the pipe body so that the glass fiber belt can penetrate through, and the hot air pipe is arranged on the moving platform and is provided with an air outlet facing the gap. The air outlet is used for outputting hot air hot melting bonding materials to be matched with the pressing wheel to extrude the glass fiber belt to be bonded to the outer wall of the pipe body. According to the winding device, through the pressing wheel and the hot air pipe, stable bonding of the glass fiber belt is achieved, and the technical problem that in the prior art, bonding of glass fibers and a PE pipe body is difficult is solved.

The invention discloses a high-durability reflective hot-melt road marking coating and a preparation method thereof, and belongs to the technical field of coatings. The coating is prepared from the following raw materials in parts by weight: 15-25 parts of modified petroleum resin, 2-5 parts of a plasticizer, 5-15 parts of glass beads, 5-10 parts of pigment, 45-60 parts of filler, 3-8 parts of a durability enhancer and 0.5-1.5 parts of an antioxidant. The modified petroleum resin is obtained by hydrolyzing silane monomers in a specific molar ratio to prepare an epoxy-terminated organic silicon oligomer and then chemically grafting the epoxy-terminated organic silicon oligomer with petroleum resin. The durability reinforcing agent is prepared by compounding nano silicon dioxide, elastic polymer micro powder and a silane coupling agent according to the mass ratio of (1-2): (1-2): 1. Through the synergistic effect of resin modification and the composite reinforcing agent, the coating has excellent wear resistance, high adhesive force, excellent low-temperature flexibility and lasting light reflection performance, and is controllable in cost, convenient to construct and wide in application prospect.

The invention provides a drainage PE pipeline hot melting connecting device and method, and relates to the technical field of pipeline welding. The pair of side frames are rotatably arranged on the two sides of the base frame in the vertical direction respectively; the rotating frame is horizontally hinged to the side frame; the fixing pieces are arranged on the rotating frames on the two sides, and the fixing pieces on the two sides are used for clamping and fixing the to-be-butted pipelines on the corresponding sides correspondingly; the first driving part is arranged on the base frame and is used for synchronously driving the pair of side frames to rotate in opposite directions; the second driving part is arranged on the side frame and used for driving the rotating frame to swing up and down around the hinge shaft of the rotating frame and achieving position locking after swinging. The large-diameter PE pipeline can be controllably bent in limited operation spaces such as a groove, so that pipe ends are smoothly butted, and the safety of the bending process and the stability of a connecting posture are ensured.

The invention belongs to the field of functional composite fabrics, and provides a mosquito-repellent thermoplastic polyurethane composite fabric and a preparation method thereof.According to the mosquito-repellent thermoplastic polyurethane composite fabric and the preparation method thereof, the design that mosquito-repellent microcapsules of a core-shell structure are dispersed in a thermoplastic polyurethane hot melt adhesive layer is adopted, a microcapsule core layer comprises mosquito-repellent active ingredients such as icaridin, deet or dimethyl phthalate, and the mosquito-repellent active ingredients are dispersed in a thermoplastic polyurethane hot melt adhesive layer; the shell layer is made of a polyurea material and is prepared through an interfacial polymerization method, high-load stable dispersion and controllable dot matrix film forming of the microcapsule in a hot melt adhesive system are achieved, the content of the microcapsule can reach 0.5-15 wt%, the particle size is controlled to be 0.1-2.0 m, the drug loading capacity reaches 10-60 wt%, the problem that the mosquito-repelling microcapsule is prone to damage and failure in the high-temperature melting mixing and hot-pressing compounding process is solved, and the mosquito-repelling microcapsule has good application prospects. The prepared composite fabric is high in mosquito repelling rate, still keeps an effective mosquito repelling function after being washed for multiple times, and has a wide application value.

The invention discloses a curtain wall aluminum plate local hot melting welding device, and belongs to the technical field of curtain wall welding, the curtain wall aluminum plate local hot melting welding device comprises a climbing mechanism used for climbing along a keel and crossing an embedded plate, and the climbing mechanism is provided with a carrying mechanism used for driving a curtain wall aluminum plate to move to a designated installation position and a welding mechanism used for welding the curtain wall aluminum plate on the keel; through the climbing mechanism and the crossing module, the device can actively clamp and climb along a vertical keel through the wheel pasting module like a wall climbing robot, and when obstacles such as embedded plates are encountered, the device can alternately retract and lift the crossing module step by step, and lossless crossing is achieved; by means of multi-degree-of-freedom coordinated movement, a curtain wall aluminum plate can be extremely accurately conveyed to a designated installation position in a three-dimensional space, meanwhile, a photoelectric detection module on the welding mechanism can automatically scan and accurately position a seam, and accurate welding of local hot melting welding is achieved in cooperation with a plasma welding gun and an angle-adjustable wire feeding pipe.

The utility model belongs to the technical field of wear-resisting ball casting, and particularly relates to an automatic pouring device for wear-resisting ball casting, which comprises a base and a mounting rack, the top of the base is fixedly connected with a mounting seat, the top of the mounting seat is fixedly provided with a mold for wear-resisting ball casting, and a moving mechanism is arranged between the mounting rack and the base. The top of the mounting frame is fixedly connected with a supporting plate, a quantitative pouring mechanism is arranged between the mounting frame and the supporting plate, a lifting mechanism is arranged below the quantitative pouring mechanism, and the front side of the mounting base is fixedly connected with a control panel. The quantitative pouring device is reasonable in structural design, hot molten iron can be quantitatively pressed into the mold through the quantitative pouring mechanism, the situation that the quality of wear-resisting ball casting is affected due to too much or too little pouring is avoided, the pouring head can be conveniently moved downwards to be inserted into a feeding port of the mold through the lifting mechanism, and the situation that the hot molten iron is spilled and wasted due to the fact that the pouring head is far away from the mold is avoided.

The present invention relates to a hot-melt adhesive composition comprising a biodegradable plastic, a thermoplastic polymer, a tackifier and a plasticizer, wherein the biodegradable plastic includes polyhydroxyalkanoate (PHA). The hot-melt adhesive composition according to the present invention has lower viscosity and higher adhesiveness compared to a petroleum-based hot-melt composition, and can be used as an eco-friendly hot-melt adhesive composition having physical properties corresponding to an excellent recycling criteria grade under recyclability assessment criteria.

The invention provides a polyamide hot melt adhesive containing dynamic reversible covalent bonds and a preparation method thereof, and belongs to the field of high polymer materials. Caprolactam and nylon 66 salt are used as raw materials, a furan ring and a carbon chain with a specific length are introduced, and the polyamide hot melt adhesive containing the dynamic reversible covalent bond is obtained through polymerization with maleimide and a derivative thereof. The melting point of the polymer can be regulated and controlled by regulating and controlling the carbon chain length of aliphatic diamine introduced into the xF salt, a furan ring in the xF salt is subjected to DA addition reaction with maleimide and a derivative thereof, dynamic reversible sites are provided, crosslinking between molecular chains is formed, a net system is formed, and the bonding strength of the material can be greatly improved. By adjusting the ratio of the xF salt to the maleimide and the derivative thereof, the reversible crosslinking behavior of the polymer can be adjusted, and finally the hot melt adhesive which has a lower melting point and excellent bonding strength and can be repeatedly used and recycled is obtained.

The invention discloses an ultrathin rigid phenolic aerogel heat insulation sheet and a preparation method thereof, and belongs to the field of heat insulation materials. The preparation method comprises the following steps: firstly, impregnating a fibrofelt in a sodium silicate-based rigidifying solution, and carrying out mould pressing and drying to form a self-supporting rigid framework; then, the framework is soaked in a phenolic aerogel precursor solution, curing, washing and drying are carried out, and framework pores are filled with phenolic aerogel; and finally compounding the hot melt adhesive film. According to the preparation method, through the specific process sequence of first rigidifying and then compounding, the problems that a traditional aerogel material is poor in rigidity and prone to pulverization, and a silicon dioxide-based material is insufficient in ultra-high-temperature ablation resistance are successfully solved, and the thickness of the obtained heat resisting sheet is 0.1-5 mm; the composite material has excellent rigidity (the compression strength is greater than 2MPa when the deformation quantity is 5%), low heat conductivity coefficient (0.02-0.045 W / (m.K)) and excellent 1200 DEG C high-temperature flame ablation resistance, and is especially suitable for thermal protection in limited spaces such as new energy batteries and the like.

The invention relates to a polyolefin hot melt adhesive, an insulating hot sticking film and a preparation method and application of the insulating hot sticking film, the polyolefin hot melt adhesive comprises the following components in parts by mass: 100 parts of polyolefin, 1-20 parts of tackifying resin, 1-60 parts of flame-retardant filler and 1-15 parts of cross-linking agent, the polyolefin comprises first polyolefin and second polyolefin in a mass ratio of 1: 9-9: 1, the melting point of the first polyolefin is lower than that of the second polyolefin, and the theoretical melting point obtained by proportionally weighting and averaging the melting points of the first polyolefin and the second polyolefin is not lower than 85 DEG C. The invention also provides an insulating hot sticking film used for the surface of the liquid cooling pipe, which comprises a first coating, an insulating film layer, a second coating and a hot melt adhesive layer prepared from the polyolefin hot melt adhesive which are sequentially stacked, and the insulating hot sticking film shows excellent high bonding strength, damp-heat aging resistance, cold and hot impact resistance and salt spray resistance; and the method has a good application prospect in the aspect of power battery liquid cooling.

The invention provides polyurethane serving as a hot melt adhesive and alcosol water as well as a preparation method and application thereof, and relates to the technical field of polyurethane binders. The preparation method comprises the following steps: mixing polydihydric alcohol, diisocyanate, an organic solvent and a catalyst to carry out polymerization reaction, and then mixing with chain extenders (dihydric alcohol containing 2-ureido-4-pyrimidone groups and dihydric alcohol containing bipyridine groups) to carry out chain extension reaction to obtain polyurethane. According to the invention, 2-ureido-4-pyrimidone and dipyridyl groups are introduced into a macromolecular chain of polyurethane, and a formed hydrogen bond can provide strong intermolecular cohesion in the adhesive, so that the strength of the material is improved, and the adhesive force with the surface of a base material can be enhanced; the bipyridine group can form a chelating structure with metal ions on the surface of a metal substrate, so that the bonding strength with the metal substrate is enhanced. According to the invention, a single polyurethane material has dual functions of hot-melt bonding and normal-temperature green solvent bonding, and has excellent bonding performance and milder bonding conditions.

The invention discloses a preparation method for plasticizing and forming a flexible thin bamboo veneer, and belongs to the technical field of processing and application of biomass materials. The method comprises the following steps: soaking a thin bamboo veneer in a polyethylene glycol solution, and drying to obtain a polyethylene glycol impregnated material; uniformly coating the surface of the polyethylene glycol impregnated material with a silane coupling agent, and drying to obtain a coupling agent modified thin bamboo veneer; and hot-pressing and compounding the modified thin bamboo veneer and a hot melt adhesive to obtain the thin bamboo veneer composite material. Through pretreatment of the thin bamboo veneer and process optimization of hot-pressing compounding of the thin bamboo veneer and the degradable material, the tensile elastic modulus reaches 6654.41 N / mm < 2 >, the transverse flexibility and the water resistance are remarkably improved, and the application field of the thin bamboo veneer is expanded.

The invention relates to a method for preparing a hard carbon material from a low-rank coal hot melt, the hard carbon material obtained by using the method, application of the hard carbon material and a sodium ion battery containing the hard carbon material. The method comprises the steps of raw material pretreatment, degradation solvent extraction, precipitation separation, spray granulation, crosslinking, primary carbonization, secondary carbonization, cooling and the like. According to the method, microcrystalline defects of the coal-based hard carbon material are regulated and controlled through self-foaming of the low-rank coal hot melt, effective regulation and control of the hard carbon microcrystalline structure are achieved, the ultrafine grinding process is omitted, meanwhile, in-situ oxygen element doping is achieved, and the surface activity of the material and the first efficiency of the negative electrode material are effectively improved. Through the method, the low-rank coal can be converted into the sodium battery hard carbon negative electrode material in a high-valued manner, the application scene of the low-rank coal is expanded, and the comprehensive utilization level of coal resources is improved.

The invention relates to the technical field of intelligent manufacturing control, and discloses a dynamic continuous polymerization and online block regulation and control method and system for a polyurethane hot melt adhesive. The invention aims to solve the technical problems of long formula development period, black box in the process and poor batch stability in the traditional polyurethane reaction extrusion process. According to the method, a closed-loop adaptive control system of virtual simulation guidance and physical data correction is constructed, so that intelligent optimization from target performance to an optimal process is realized. The core of the method is that space-time alignment of full-cycle data is realized by utilizing a material retention time distribution function, and internal parameters of an aggregation kinetic model are reversely corrected and a formula knowledge base is updated based on actually measured evolution data and theoretical prediction deviation characteristics. By constructing an intelligent manufacturing system with transparent perception and accurate regulation and control, the formula development efficiency and the product quality consistency are remarkably improved, and the self-adaptive regulation capability in the production process is greatly enhanced.

The invention provides a microwave detection method and device for PE pipe hot-melting weld defects, and the method comprises the following steps: 1) taking a hot-melting weld of a PE pipe and a base material near the weld as detection objects, and carrying out axial and circumferential microwave scanning to obtain a reflection coefficient of each position point; 2) carrying out two-dimensional space Fourier transform on the reflection coefficient of each position point; 3) carrying out phase correction on the converted data in the depth direction; 4) carrying out two-dimensional space inverse Fourier transform on the corrected data to obtain a reflection coefficient of the target; 5, image reconstruction is carried out on the reflection coefficient of the target, and information of the defects in the PE pipe hot-melt welding seam is obtained.According to the scheme, the method has the advantages that the defects can be detected, the defect positions can be determined, and conclusion obtaining does not excessively depend on personnel skills.

The invention relates to the technical field of fabric fabrics, in particular to preparation of a stain-resistant and waterproof polyester composite fabric. The invention discloses a stain-resistant waterproof polyester composite fabric and a preparation method thereof, the composite fabric is composed of three layers from outside to inside, the first layer is a polyester filament yarn surface layer subjected to fluorinated graphene and plant source C18 alkylsilane amphiphobic finishing; the second layer is a copolyamide hot melt adhesive net film with a melting point of 105 DEG C; and the third layer is a degradable multifunctional thermoplastic polyurethane elastomer film loaded with silver zeolite antibacterial microcapsules and conductive carbon nanotubes. An amphiphobic finishing liquid is uniformly deposited on the surface of polyester by adopting a supercritical CO2 one-step method, and nanoparticles and fibers are covalently bonded through a chitosan-citric acid cross-linked network, so that the waterproof grade is still greater than or equal to 90 after 30 times of water washing, the oil repellent grade is greater than or equal to 5, and the water contact angle and the oil contact angle are reduced by lt; the temperature is 5.5 DEG C, and the moisture permeability retention rate is gt; the antibacterial rate is 97%, and the antibacterial rate is gt; the compost degradation rate within 180 days is gt; 90%.

The invention relates to an alignment heating and pressing system and method for an automobile radar hot-melt damping fin. The system comprises an outer plate positioning tool table which is provided with a hollow window; the outer side heating module is arranged corresponding to the hollow window; a profiling pressure head is arranged at the tail end of the inner side pressurizing mechanical arm; the feeding and aligning system is used for automatic feeding and visual positioning of the damping fins; and an integrated control system. The method comprises the following steps: S1, feeding and positioning; s2, performing visual alignment and pre-placement; s3, heating and activating the outer side to melt the hot melt adhesive layer; s4, carrying out inner side profiling pressurization lamination, and realizing bubble-free lamination under the combined action of heat and pressure; s5, pressure-maintaining cooling and curing are carried out; and S6, circulation. Through cooperative automatic operation of outer side heating and inner side profiling pressurization, the problems that efficiency is low, attaching is not uniform and bubbles are likely to be generated due to traditional manual rolling are solved, high-quality, high-efficiency and high-consistency installation of the hot-melt damping fin is achieved, and the detection performance of a vehicle-mounted radar is fundamentally guaranteed.

The utility model discloses a shell structure and a battery. The shell structure comprises a shell main body, a pressure relief hole and a sealing element, the shell main body is used for accommodating the battery cell assembly; the pressure relief hole is formed in the shell main body; the sealing piece comprises a connecting piece and hot melt adhesive, the connecting piece is provided with a first through hole, the first through hole is filled with the hot melt adhesive, the sealing piece is connected with the shell body, and the first through hole corresponds to the pressure relief hole in position. Wherein the hole wall of the first through hole protrudes to form a supporting surface and the hot melt adhesive is attached to the supporting surface, and / or the hole wall of the first through hole is sunken to form a supporting surface and the hot melt adhesive is attached to the supporting surface. The shell structure provided by the utility model can simultaneously meet the mechanical drop and hot box test requirements of the battery cell assembly, and can generate a response to thermal runaway in time.

The invention belongs to the technical field of battery manufacturing and detection, and particularly relates to a lithium battery module hot-melt double-sided tape performance detection system, which comprises a dynamic hot-pressing bonding module, an environment simulation and isolation cavity, an in-situ microenvironment mechanical loading module, a multi-physics field coupling sensing and acquisition module and a central process control and data processing unit. The dynamic hot-pressing bonding module can accurately reproduce a temperature-pressure-time process curve; the environment simulation cavity realizes in-situ testing in a temperature field of-40 DEG C to 150 DEG C; the in-situ mechanical loading module supports 180-degree stripping, shearing and creep tests; the multi-physics field sensing module synchronously collects interface temperature, pressure distribution, force and displacement signals; and the central control unit realizes full-process automatic control and data analysis. Through the integrated design, the hot-pressing bonding and dynamic service environment can be integrally simulated, in-situ mechanical property characterization is carried out, and the performance of the adhesive tape in the whole life cycle of the lithium battery module is truly reflected.

The invention belongs to the technical field of digital printing heat transfer printing materials, and particularly relates to a static-free loose-powder DTF transfer printing film and a preparation method thereof. The invention aims to solve the problem of contradiction among antistatic function, ink adsorption and peel strength of the current DTF transfer film. According to the invention, the ionic liquid antistatic agent coated by the polymer microcapsule is dispersed in the water-based resin adhesive to form the lower antistatic network structure layer; meanwhile, the crystallization behavior of the crystalline polyester hot melt adhesive resin taking bio-based 2, 5-furandicarboxylic acid as a rigid component is regulated and controlled through surface modified boron nitride nanosheets, a phase separation curing process is utilized, so that an antistatic network stably exists at the lower part of the coating, and hot melt adhesive resin microcrystals are selectively enriched on the outermost surface of the coating; and a thermally induced phase change bonding layer is formed, so that no static electricity disturbs powder in the printing and powder scattering processes.

The invention provides a hot melt adhesive and a preparation method thereof, and relates to the technical field of adhesives. According to the hot melt adhesive, amorphous polyolefin (APAO) is used as a main body, ethylene-vinyl acetate copolymer (EVA) is added as a compatilizer, and Fischer-Tropsch wax is used as a viscosity modifier. The preparation method comprises the following steps: firstly synthesizing a dopamine functional polymer, and then carrying out melt blending on the dopamine functional polymer, APAO, EVA, tackifying resin and other components so as to stably introduce a catechol group into a hot melt adhesive system. When the hot melt adhesive is bonded with a metal surface, the catechol group can form a firm coordinate bond with metal ions, so that the adhesive force is greatly improved. The product provided by the invention has high adhesive force, excellent flexibility, good compatibility and construction performance, and is suitable for bonding and sealing metal materials.

The invention provides a hot-melt epoxy resin composition, a prepreg, a fiber reinforced composite material and a preparation method, the hot-melt epoxy resin composition comprises 60-70 parts of liquid epoxy resin, 30-40 parts of solid epoxy resin, 10-20 parts of a flame retardant, 5-15 parts of a flexibilizer, 5-15 parts of a curing agent, and 0.5-1.5 parts of an impregnating compound; the prepreg comprises the following components in parts by weight: 30-45 parts of a hot-melt epoxy resin composition and 55-70 parts of a reinforcing material, the fiber-reinforced composite material is obtained by laminating prepregs in a predetermined form and pressing / heating to cure the resin. The carboxyl-terminated nitrile rubber and the polyethersulfone are mixed for toughening, so that the viscosity of a resin matrix in the curing process is effectively ensured while toughening is performed, serious gummosis of the resin matrix is prevented, and the anti-stripping strength of the composite material is improved; the flame retardant and smoke suppression performance of the composite material can meet the requirements of 60s vertical combustion, 30s 45-degree combustion and smoke density test of an aviation system, so that the system realizes halogen-free flame retardance, and the application range of the material is wider.

The invention discloses a preparation device and method of a quick-drying polyolefin hot melt adhesive. The preparation device comprises a rack, and a premixing module, a main material conveying module, a reaction synthesis module and a liquid phase metering and adding system which are arranged on the rack, the pre-mixing module comprises a pre-mixing feeding hopper and a pre-mixing bin located above the pre-mixing feeding hopper, the bottom of the pre-mixing bin is communicated with the pre-mixing feeding hopper through a discharging valve, a weighing module is arranged at the bottom of the pre-mixing feeding hopper and fixedly connected with the rack through a weighing sensor support, and a pre-mixing stirring mechanism is arranged in the pre-mixing bin; the main material conveying module comprises a feeding auger, the feeding end of the feeding auger is connected with the premixing feeding hopper through a discharging valve, and the discharging end of the feeding auger is communicated with the reaction synthesis module; through an automatic device integrated with a central control system and an optimized preparation process, accurate metering, coordinated regulation and segmented treatment in the hot melt adhesive production process are realized, and the product consistency and the production efficiency are effectively improved.

The waterproof breathable device comprises a panel, waterproof breathable cloth and a bottom plate which are sequentially stacked, the panel and the bottom plate are provided with corresponding breathable areas, the waterproof breathable cloth is provided with a plurality of through holes, and the through holes are correspondingly distributed in the breathable areas and the periphery of the bottom plate. And the panel is bonded with the bottom plate through the through hole. The breathable waterproof cloth disclosed by the utility model is subjected to laser drilling treatment, so that the fitting firmness of the hot melt adhesive, the waterproof cloth and the TPU is remarkably enhanced, shoe parts have excellent waterproofness and breathability, and the durability and the use experience of products are improved.

The invention discloses a paper-plastic composite reactive polyurethane hot melt adhesive for low-temperature coating, and belongs to the technical field of polyurethane adhesives, the paper-plastic composite reactive polyurethane hot melt adhesive for low-temperature coating comprises the following components by weight: 50-70 parts of modified polyester polyol, 30-50 parts of modified polyether polyol, 15-24 parts of diisocyanate, and 5-30 parts of tackifying resin, 0.1-1 part of a catalyst, 5-35 parts of a filler, 0.05-2 parts of a polymerization inhibitor and 0.1-0.5 part of an antioxidant; the modified polyester polyol is modified poly (butylene succinate); the modified polyether polyol is modified polypropylene glycol; the polyurethane hot melt adhesive prepared by modifying 5-norbornene-2-methylamine with a strong polar bond-NH and 3, 7-dimethyl octyl-6-ene-1-alcohol containing an insect-proof and mildew-proof functional component with polyhydric alcohol has relatively low melting temperature and viscosity, has initial viscous force of more than 1N and final viscous force of more than 5N at the same time, and has the characteristics of high temperature resistance, high temperature resistance, high temperature resistance and the like. The method can be well applied to paper-plastic compounding for low-temperature coating.

The utility model discloses an internal and external integrated trigger circuit for an excitation fuse, which relates to the technical field of new energy circuit protection, and comprises an external trigger unit, which comprises an external trigger interface, a voltage-regulator tube D5 and a signal output interface; the internal trigger unit comprises an arc ignition fuse, a pulse transformer, a half-bridge rectifier circuit and a signal output interface; the external trigger unit receives an external trigger signal through one-way conduction of a voltage-regulator tube D5, and the external trigger signal is transmitted to the igniter through the signal output interface. According to the utility model, through a double-trigger redundancy design, double insurance is formed by external active trigger and internal self-trigger. When external triggering fails, internal triggering still can independently activate the igniter through the pulse transformer and the half-bridge rectifying circuit, and the risk that protection fails when a single Pyro fuse control loop fails is thoroughly avoided. And the response time of the excitation fuse is shorter than that of a traditional hot-melt fuse, so that the diffusion risk of a short-circuit accident is remarkably reduced.

The utility model relates to new energy battery technical field, concretely provides a battery cover plate assembly and battery, the battery cover plate assembly of the utility model includes the cover plate body, and is located at the insulating piece of the cover plate body one side to pole group, wherein, the insulating piece includes the cover plate gasket and the protective pad of integrative connection, the cover plate gasket is attached to the cover plate body, the protective pad is reversibly connected in the one side of cover plate gasket width direction, and has the buckling state of buckling in the side of cover plate gasket opposite to the cover plate body, the hot melt connecting portion is equipped on the protective pad, and the hot melt portion is correspondingly provided on the cover plate gasket, under the buckling state, the hot melt connecting portion can hot melt solid connection on the hot melt portion, and make the protective pad form the isolation between the welding part of pole post and pole group, the battery cover plate assembly of the utility model guarantees the buckling connection reliability of protective pad on the cover plate gasket, thereby can form the firm and reliable isolation protection to the welding part of the pole lug and pole post of battery.

The application relates to the battery technical field and discloses a gas pressure detection device, a battery cell and a preparation method of the gas pressure detection device. The gas pressure detection device comprises a gas guide pipe and an annular preform, and the annular preform is formed by a hot melt sealing material so that the annular preform can be melted to form a first sealing layer. The annular preform is sleeved on the outer circumferential side of a liquid injection port, and the annular preform is made of a hot melt sealing material. On one hand, the annular preform can be used for realizing the rapid alignment assembly of the gas guide pipe and the liquid injection port, improving the position positioning efficiency of the gas guide pipe and the liquid injection port; on the other hand, the annular preform is heated to be melted, the melted product of the annular preform is uniformly distributed on the circumferential side of the gas guide pipe, the sealing efficiency of the gas guide pipe and the liquid injection port is further improved, and the assembly efficiency of the gas pressure detection device is improved.