37results about How to "Guaranteed bonding performance" patented technology

The invention relates to the technical field of photovoltaic packaging materials, and discloses a black high-reflection infrared integrated packaging material and a preparation method thereof, and the black high-reflection infrared integrated packaging material comprises a bonding packaging layer, a light management layer, a mechanical transition layer and an insulating supporting layer which are arranged from top to bottom; all the layers are subjected to integrated melting and co-extrusion to obtain the packaging material; the first melting point of the bonding packaging layer is 70-100 DEG C, the second melting point of the bonding packaging layer is 110-130 DEG C, and the content of the cross-linked gel after irradiation is 5-30%; the melting point of the light management layer is 70-130 DEG C, the light management layer comprises a perylene black surface layer and a white light reflecting layer which are sequentially arranged, the visible light absorptivity of the perylene black surface layer is larger than or equal to 90%, and the infrared light transmittance of the perylene black surface layer is larger than or equal to 50%; the melting point of the mechanical transition layer is 90-130 DEG C; and the melting point of the insulating support layer is 120-180 DEG C. According to the invention, the high transmittance of infrared light is maintained while the deep black appearance is realized, the secondary absorption of the infrared light can be realized, and the overall efficiency of the assembly is improved.

The invention provides a silicon-based negative pole piece and a lithium ion battery comprising the same, and relates to the technical field of lithium ion batteries. Comprising a negative electrode current collector, a second active material layer arranged on at least one surface of the negative electrode current collector, and a first active material layer arranged on the surface of the second active material layer. The design of the two active material layers ensures high energy density, and meanwhile, the formula design is optimized by combining the bonding characteristic of the interface layer, so that large internal stress is prevented from being generated in the charging and discharging process; the organic porous cross-linked polymer is applied to the negative pole piece, and the polymer is loose and porous and can be subjected to cross-linked polymerization in a high-temperature process, so that negative pole particles are tighter, expansion of a silicon negative pole in a charging and discharging process can be buffered, and stripping and cracking of the pole piece are prevented.

The invention discloses a method for improving the bending and shearing resistance of a height difference beam through CFRP cloth. The method comprises the steps that a to-be-reinforced position is determined; performing surface treatment; repairing and leveling; pasting the carbon fiber cloth; the surface of the to-be-reinforced area is coated with an interface agent; the method comprises the following steps: uniformly smearing a structural adhesive in a to-be-reinforced area at the top of a structural beam, and adhering carbon fiber cloth to the surface of the to-be-reinforced area; inverted-cone-shaped first chemical anchor bolts and inverted-cone-shaped second chemical anchor bolts are driven into the first chemical anchor bolt holes and the second chemical anchor bolt holes correspondingly; steel plate pressing strips I and II are adhered to the surfaces of the chemical anchor bolts I and II by using structural adhesive; seventhly, the high-angle end and the low-angle end of the structural beam are reinforced; a third inverted-cone-shaped chemical anchor bolt and a fourth inverted-cone-shaped chemical anchor bolt are hit into the third chemical anchor bolt hole and the fourth chemical anchor bolt hole correspondingly; inverted-cone-shaped chemical anchor bolts V and VI are driven into the positions of the chemical anchor bolt holes V and VI respectively; the L-shaped angle steel I and the L-shaped angle steel II which are matched with each other in size are respectively adhered to the outer sides of the high-angle end and the low-angle end by using structural adhesive. According to the method, the bending resistance and the shearing resistance of the height difference beam can be improved at the same time.

The invention provides ceramic ink-jet 3D printing supporting ink, a preparation method of the ceramic ink-jet 3D printing supporting ink and a ceramic ink-jet 3D supporting printing method, and relates to the technical field of 3D printing. The ceramic ink-jet 3D printing supporting ink provided by the invention comprises the following preparation raw materials in parts by mass: 10-50 parts of solid particles, 40-80 parts of a solvent, 0-9 parts of a dispersing agent and 0-2 parts of a binder, and the mass parts of the dispersing agent and the binder are not 0. The supporting ink provided by the invention is relatively low in cohesiveness and easy to remove after ceramic ink-jet 3D printing is completed, and the integrity of a sample after removal is ensured; in addition, the supporting ink and the solid ink have good matching performance. According to the ceramic ink-jet 3D supporting printing method, the supporting ink and the entity ink are matched to print the mixed supporting structure, the problem that in the ceramic ink-jet 3D printing process, due to supporting cracking, a green body is damaged is solved, and it is guaranteed that printing is conducted smoothly.

The invention discloses a dispersing agent and a preparation method and application thereof, negative electrode slurry and a preparation method thereof, a negative electrode plate and an electrochemical device. On one hand, by reducing the chain length of the sodium carboxymethyl cellulose polymer, the crystallinity of the sodium carboxymethyl cellulose polymer is reduced, the rigidity of the sodium carboxymethyl cellulose polymer is reduced, the problem of cracking of the negative electrode slurry in the high-speed thick coating process is solved, the energy density of the battery is improved, and the efficiency of the battery is improved. On the other hand, the copolymer is obtained by polymerizing unsaturated bond-containing carbon chain groups on part of hydroxyl groups of the sodium carboxymethyl cellulose polymer, so that the copolymer has a plurality of branches, and the branches provide flexible chain segments for the sodium carboxymethyl cellulose polymer and reduce the rigidity of the sodium carboxymethyl cellulose polymer; and thus, the problem of cracking of the negative electrode slurry in the high-speed thick coating process is solved, the energy density of the battery is improved, and the efficiency of the battery is improved.

The invention discloses a composite material for repairing concrete cracks by regulating and enhancing polyurea through few-layer hydrotalcite, which comprises the following three steps: S1, adding hydrotalcite and a modifier into deionized water, heating to 70-85 DEG C, carrying out constant-temperature stirring reaction for 10-12 hours, after the reaction is finished, cooling, filtering and collecting solids, cleaning with deionized water, and then freeze-drying to obtain a composite material; further carrying out ball milling treatment to obtain modified few-layer hydrotalcite; s2, uniformly mixing the modified few-layer hydrotalcite with polyether polyol, and carrying out vacuum dehydration at the temperature of 100-160 DEG C for 1-3 hours; and S3, adding the dehydrated mixture into isocyanate, quickly and uniformly mixing, and then pouring the mixture into a mold for molding. By adding the modified few-layer hydrotalcite, the tensile strength of the polyurea composite material can be regulated and controlled between 20 MPa and 32 MPa, the tensile strength of the polyurea composite material is basically matched with the concrete while the interface bonding performance of the polyurea and the concrete is guaranteed, and the long-term use performance of the repaired concrete is improved.

The utility model belongs to the technical field of water stop structures, and particularly relates to an LUUI closed type rubber water stop belt and a water stop structure used at the joint of a new building and an old building. The water stop belt comprises a double-U-shaped sealing belt, an L-shaped wing plate belt and an I-shaped wing plate belt. The double-U-shaped sealing belt is formed by oppositely buckling two U-shaped belts to form a sealed whole; the L-shaped wing plate belt and the I-shaped wing plate belt are fixed to the two opposite sides of the double-U-shaped closed belt respectively. The water stop structure comprises an L-shaped groove body formed in the side, close to a joint, of an original building, and an L-shaped wing plate strip is matched with the L-shaped groove body and fixed to the L-shaped groove body. The double-U-shaped sealing belt is arranged in a joint of an original building and a new building, and the width B of the double-U-shaped sealing belt is matched with the width of the joint. And the I-shaped wing plate strip is poured in a new building. The LUUI closed type rubber waterstop and the waterstop structure can adapt to telescopic displacement and uneven settlement difference between new and old building concrete, so that the waterstop does not lose efficacy due to overlarge settlement difference and vibration dislocation, and potential safety hazards caused by premature tearing failure are avoided.

The present invention provides a packaging film, composite glass and photovoltaic building integrated components. The packaging film comprises a first adhesive layer, a reinforcement layer and a second adhesive layer stacked in sequence, wherein the reinforcement layer comprises a matrix resin and an active agent dispersed therein; the structural formula of the matrix resin is as follows: wherein, and 65%≤a≤95%, 15%≤b≤80%; the active agent contains at least two active groups that can react with ‑COOH. By controlling the values ​​of a and b within the above range, the packaging film has high strength and transmittance, and the safety glass comprising the packaging film has excellent long-term aging reliability, simple lamination process, high yield and low cost.

The invention discloses a hysteresis flexible sound insulation board and a manufacturing method, which belongs to the field of industrial sound insulation and vibration isolation. A hysteresis flexible sound insulation board manufacturing method comprises the following steps: stirring flexible particles, ferromagnetic particles and glue for 15 to 20 minutes to form a mixture, then moving the mixture into a mold, slowly applying pressure to the mixture for molding, and applying a magnetic field to the mixture while applying pressure, so that the ferromagnetic particles adjust their directions due to the magnetic field, stopping pressurization and applying the magnetic field after the mixture is formed, taking out the formed mixture, applying the magnetic field again after cooling, and applying the magnetic field to the mixture again, wherein the applied magnetic field strength is the same as the magnetic field strength applied during the molding process, and stopping applying the magnetic field after 25 to 35 minutes to form a hysteresis flexible sound insulation board. The hysteresis flexible sound insulation board and the manufacturing method of the invention improve the strength, rigidity and damping effect of the hysteresis flexible sound insulation board, and improve the sound insulation and vibration isolation effects of the hysteresis flexible sound insulation board.

The application discloses a single-component transparent silicone sealant and a preparation method thereof. The single-component transparent silicone sealant is prepared from alpha, omega-dihydroxyl polydimethylsiloxane, a hydroxyl-terminated phenyl-modified resin, heat-resistant fillers, a hydroxyl scavenger, a crosslinking agent, a coupling agent and a catalyst. The crosslinking agent is composed of butanone oxime silane and siloxane oligomers. The hydroxyl-terminated phenyl-modified resin is modified from methyl-terminated phenyl MQ resin. The MQ ratio of the methyl-terminated phenyl MQ resin is 0.5-1, and the phenyl content is 5%-30%. The silicone sealant can maintain high transparency, and has good heat resistance and curing performance. The silicone sealant is a single-component system, and can be applied to the market. After being applied to the market, the silicone sealant can be constructed by using simple glue coating equipment, and the construction cost of enterprises is reduced.

The invention discloses a nested structure applied to a transverse connection cast-in-place section of a UHPC-NC laminated T-beam, which comprises a reinforced concrete T-beam, an ultra-high performance concrete reinforcing thin layer, nested channel steel, studs and connecting straight bars, and can also provide a steel bar frame foundation for the cast-in-place section. In addition, the invention further relates to an assembling and overlapping method of the ultra-high-performance concrete-common concrete overlapping bridge deck structure, which comprises the following steps of: after prefabricating the T-shaped beam in a factory, performing corresponding interface treatment on the surface on a construction site, punching to reserve holes conforming to the sizes of the studs, and then pouring the ultra-high-performance concrete thin layer to form the ultra-high-performance concrete-common concrete overlapping bridge deck structure. And meanwhile, reserving of holes is paid attention to during pouring of the UHPC thin layer, and the nesting structure prefabricated in a factory is mounted before pouring of the cast-in-place section between the beams in a project. The construction condition is simple, the construction speed is high, the high tensile toughness of materials can be brought into full play, the anti-cracking performance of the bridge deck in the hogging moment area is effectively improved, the bonding anti-sliding effect of the common concrete layer and the ultra-high performance concrete thin layer is effectively enhanced, the foundation of a steel bar system of a cast-in-place section can be formed, and the working procedures are effectively reduced.

The present invention discloses a fully automatic sealing line auxiliary device for insulating glass, comprising: a glue spraying assembly, wherein the glue spraying assembly comprises a glue guide tube and a glue spraying head, wherein the glue guide tube is fixedly connected to the upper end of the glue spraying head and is internally connected to the glue spraying head, wherein the glue spraying head is flat and is tilted as a whole; a compacting assembly, wherein the compacting assembly comprises a pressing wheel, a connecting arm and a rotating shaft, wherein two connecting arms are rotatably arranged on both sides of the glue spraying head through an elastic shaft, wherein the rotating shaft is rotatably arranged between the two connecting arms, and wherein the pressing wheel is rotatably arranged on the rotating shaft; and a scraping assembly, wherein two scraping assemblies are symmetrically arranged on both sides of the pressing wheel through a limiting assembly, wherein the scraping assembly comprises a connecting block, a shaft block and a scraper, wherein the connecting block is fixedly connected to the limiting assembly, wherein the shaft block is elastically rotated at the end of the connecting block, and one end of the scraper is fixedly connected to the shaft block. The present invention discharges the air in the colloid and ensures the connection between the glasses.

The utility model discloses a drying device for mortar production, which relates to the technical field of mortar drying and comprises a working table, a plurality of groups of supporting legs are arranged at the bottom end of the working table, a mortar conveying belt is arranged in the working table, a working cover is arranged at the top end of the working table, and a discharging box is arranged on one side of the working cover through two groups of abutting blocks. A rolling assembly is arranged on one side of the discharging box. A stirring assembly and a control panel are arranged at one end of the working cover, and a drying assembly is arranged at the other end of the working cover. Through the arrangement of the rolling assembly, mortar falling into the discharging box can be rolled through the two sets of pressing rollers, the mortar with large particles is pulverized into small particles, then the strength and stability of the mortar are improved, the bonding performance of the mortar is guaranteed, and the production quality of the mortar is improved.

The invention relates to the technical field of low-temperature upgrading, and discloses a coking coal caking property improving method and system based on low-temperature upgrading, and the method comprises the following steps: carrying out data acquisition on a target coking coal sample to obtain a basic coal quality parameter set; performing finite element numerical simulation on the carbonization behavior to obtain physical state structure hierarchical data; mapping the state structure hierarchical data to a preset volatile component release kinetics database to obtain a volatile component extraction rate curve; carrying out correlation analysis on a co-evolution behavior between a melting layer and a colloid layer in the target coking coal sample to obtain an initial deformation coefficient and an initial air permeability coefficient; performing global optimization on the low-temperature upgrading process parameter combination to obtain a deformation coefficient, an air permeability coefficient and an optimal process parameter group; when the technological requirements are met, outputting an optimal technological parameter group to obtain an optimal technological parameter message; according to the invention, the efficiency of improving the caking property of the coking coal can be improved.

The utility model relates to the technical field of endoscopes, and discloses an endoscope insertion tube and an endoscope, and the endoscope insertion tube comprises a metal elastic layer, a metal braid layer and a self-repairing layer. The self-repairing layer comprises a self-repairing resin layer and a self-repairing coating layer; the self-repairing resin layer is arranged outside the metal braid layer, the self-repairing coating layer is arranged outside the self-repairing resin layer, and the material of the self-repairing coating layer comprises a coating with self-repairing capability. The outer surface of the endoscope insertion tube with the structure is the self-repairing layer, when the outer surface of the insertion tube is scratched or damaged due to improper use of an operator, the self-repairing layer can automatically repair the outer surface of the insertion tube under the conditions of heating, illumination or radiation and the like, the outer surface of the insertion tube is convenient to repair, the repairing cost is low, and the service life of the insertion tube is prolonged. The service life of the insertion pipe can be effectively prolonged; when the outer surface of the insertion tube is damaged, the insertion tube does not need to be replaced, so that the repair and maintenance cost of medical equipment can be reduced.

The present invention relates to an assembled shear-resistant reinforcement device for a small concrete box girder based on a UHPC prefabricated board and a reinforcement method thereof, comprising a UHPC prefabricated board assembled on the outer surface of the small box girder; a plurality of anchor bolt reserved holes are reserved on the outer surface of the UHPC prefabricated board, and correspondingly, anchor bolts corresponding to the anchor bolt reserved holes are pre-buried in the small box girder, the anchor bolts are inserted into the anchor bolt reserved holes, and are fastened by bolts to fit the UHPC prefabricated board to the outer surface of the small box girder; the advantages of the present invention are that a shear-resistant reinforcement method for a small box girder by enlarging the cross section method and the excellent performance of UHPC materials are combined, and from the perspective of assembly, the newly thickened UHPC prefabricated board is prefabricated in a factory and steam-cured at high temperature, which avoids on-site pouring and curing of concrete, and can fully guarantee the performance of the UHPC material; and there is no problem of later durability after reinforcement, and maintenance-free after reinforcement can be achieved.

The invention provides a roof waterproof structure and a construction method thereof, and relates to the technical field of constructional engineering.The roof waterproof structure comprises a wedge-shaped groove formed in a parapet wall, a waterproof roll, a sealing structure and a waterproof layer structure, and a closing head of the waterproof roll is arranged in the wedge-shaped groove; the sealing structure is arranged in the wedge-shaped groove and used for sealing the waterproof roll and the wedge-shaped groove and enabling the surface of the wedge-shaped groove to be flush with the surface of the parapet wall; the waterproof layer structure is arranged on the surface of the parapet wall. The method has the beneficial effects that the bonding of the waterproof coiled material and the base layer at the waterproof closing head can be ensured to the maximum extent, the common quality problems of falling, hollowing and the like of the waterproof coiled material before the construction of the next working procedure are effectively avoided, the leakage problem is greatly avoided, the waterproof closing head is really hidden, and the service life of the waterproof coiled material is prolonged. The problem of leakage at the coiled material closing position is effectively avoided, and the overall impression of the vertical face of the parapet wall is guaranteed.

The invention discloses a wavelength conversion device and a preparation method thereof, and the device comprises a fluorescent ceramic layer, a dielectric film reflection layer, a transition layer, a first soldering-aid layer, a soldering tin layer, a second soldering-aid layer, and a heat sink substrate, the first weld-aid layer and the second weld-aid layer are made of platinum, gold and nickel metal elementary substances or alloy of any two or three of platinum, gold and nickel metal elementary substances, the transition layer is made of titanium, chromium and nickel metal elementary substances or alloy of any two or three of titanium, chromium and nickel metal elementary substances, and the dielectric film reflecting layer is a tantalum oxide, titanium oxide and silicon oxide composite layer. The reflecting layer of the wavelength conversion device is completely not eroded by the soldering tin layer, and the wavelength conversion device is good in heat dissipation effect and reflecting effect and high in light emitting efficiency.

The utility model relates to the technical field of ice-making machines, in particular to an ice-making machine which comprises an outer shell, the outer shell is provided with a containing cavity, the containing cavity is provided with an ice-making assembly and a heat dissipation assembly, and the ice-making assembly comprises an ice-making part, a refrigerating part located on the lower side of the ice-making part and a heat conduction part connected between the refrigerating part and the heat dissipation assembly. Insulating glue is arranged between the refrigerating part and the ice making part, and insulating glue or heat conducting glue is arranged between the heat conducting part and the heat dissipation assembly. Compared with the prior art, the insulation paste adopted by the utility model has good temperature resistance and moisture resistance, and can better maintain the bonding performance in a vibration state in an environment with large temperature difference and large humidity, thereby reducing the condition that the heat conductivity coefficient is reduced due to the loosening of the refrigeration piece caused by environmental change, and improving the reliability of the refrigeration piece. The arrangement of the heat conduction part can better improve the heat transfer between the refrigeration piece and the heat dissipation assembly, and the normal ice making effect of the ice maker is ensured.

The invention relates to the technical field of lithium ion batteries, in particular to a binder for a diaphragm, a preparation method of the binder and a lithium ion battery diaphragm, and the preparation method of the binder for the diaphragm comprises the following steps: mixing a coating / grafting monomer, an initiator A, alkali liquor and water to obtain a mixed solution; preparing a microsphere seed emulsion by utilizing the seed microsphere monomer through emulsion polymerization; and dropwise adding part of the mixed solution into the seed microsphere emulsion, keeping the temperature at 80-85 DEG C, terminating the reaction, dropwise adding the remaining mixed solution, keeping the temperature, cooling to 60-70 DEG C, adding an initiator B, keeping the temperature, heating to 85-90 DEG C, reacting, and filtering to obtain the binder for the diaphragm. According to the invention, microsphere seeds are used as a template, polymerization is continued on the surface of the microsphere seeds to form a coating layer and a hydrophilic molecular chain is grafted on the surface of the microsphere seeds, and polymer macromolecules with high Tg are further prepared in the emulsion, so that on the basis of ensuring the adhesive property and improving the heat resistance, the breathable value-added value is reduced.

The present invention discloses a reinforcement method for a bridge main beam damaged by impact, which belongs to the field of bridge engineering and includes the following steps: cleaning the impact damage area, roughening the concrete of the main beam web at the edge of the impact damage area; roughening the auxiliary reinforcement area, dividing the auxiliary reinforcement area into a deep roughening interface area and a shallow roughening interface area; installing the formwork, pouring ultra-high performance concrete, removing the formwork after the ultra-high performance concrete reaches the design strength, grinding off the protruding reinforcement material around the joint, painting the entire beam, unifying the appearance of the main beam, and completing the reinforcement work. The present invention can not only ensure the bonding performance between the reinforcement material and the existing beam body, but also utilize the high tensile strength of the ultra-high performance concrete to improve the cracking strength of the interface between the damaged area and the undamaged area.

The application relates to the field of road construction materials, and particularly discloses a road base mixture based on construction waste recycled aggregate and a preparation method thereof, the road base mixture is prepared from the following raw materials in parts by weight: recycled aggregate 80-100 parts, cement 20-30 parts, mineral powder 10-20 parts, fly ash 5-10 parts, water 14-20 parts, anti-shrinkage stabilizer 2-5 parts and reinforcing material 2-6 parts; and the preparation method comprises the following steps: S1, uniformly mixing and stirring the recycled aggregate, the cement, the mineral powder and the fly ash to obtain initial mixture; and S2, uniformly mixing and stirring water, the anti-shrinkage stabilizer and the reinforcing agent in the initial mixture to obtain finished mixture; the road base mixture has the advantages of high strength and good durability.

The present invention discloses a repair structure of a compartment sandwich panel, the compartment sandwich panel comprises a core material and a first skin and a second skin respectively laid on both sides of the core material in the thickness direction, and the first skin is a metal skin, the repair structure comprises a repair hole opened on the compartment sandwich panel, the repair hole is formed by cutting the first skin toward the core material along the thickness direction of the compartment sandwich panel, the repair hole does not penetrate the second skin, a filling block is filled in the repair hole, a repair skin covers the repair hole, the material of the repair skin is the same as that of the first skin, and the repair skin is welded to the first skin; the filling block is cut from the same material as the core material. The present application also discloses a construction method of the repair structure. By using the present application, the repair process can be effectively simplified, the safety of the repair structure can be improved, and the waterproof performance can be improved.

This invention relates to the field of photovoltaic module encapsulation materials technology, specifically a thermoplastic polyolefin carrier film, comprising 10-100 parts of thermoplastic polyolefin, 0.1-5 parts of a crosslinking agent, 0.1-5 parts of a tackifier, and 0.1-5 parts of a light stabilizer. The thermoplastic polyolefin, crosslinking agent, tackifier, and light stabilizer are stirred evenly, and the raw materials are melt-extruded through a screw extruder, controlling the extrusion temperature and screw speed to obtain a single-layer or multi-layer TPO carrier film. After casting, embossing, cooling and shaping, thickness measurement, traction, slitting, and winding, the thermoplastic polyolefin carrier film is obtained. The thermoplastic polyolefin carrier film is irradiated to form a crosslinked network through electron beam radiation. This invention utilizes γ-methacryloyloxypropyltrimethoxysilane and vinyltrimethoxysilane to ensure the adhesion between the carrier film and the BC solar cell after high-temperature aging, improve the high-temperature resistance of the module, and effectively reduce the generation of EL shadows in the module under high-temperature conditions.

The invention discloses a curing process of a PUR hot melt adhesive for bookbinding, and belongs to the technical field of PUR hot melt adhesive processing.The curing process of the PUR hot melt adhesive for bookbinding comprises the specific implementation steps that firstly, the PUR hot melt adhesive is heated and melted; secondly, the PUR hot melt adhesive and book paper sheets are attached; step 3, cooling and solidifying the PUR hot melt adhesive; and step 4, finishing the surface of the cured PUR hot melt adhesive. By controlling the temperature, the humidity and the melting time of the PUR hot melt adhesive in each stage of melting, adhesive injection and curing, the humidifying and curing efficiency of the PUR hot melt adhesive can be effectively guaranteed, meanwhile, the humidifying and curing stability of the PUR hot melt adhesive is guaranteed, the hardness and the bonding force of the finally cured PUR hot melt adhesive are guaranteed, and the use quality of the PUR hot melt adhesive is guaranteed.

The invention belongs to the technical field of electronic packaging testing, and particularly relates to a potting material and printed board bonding strength testing structure and method.The potting material is poured between two printed boards, the two printed boards and the potting material form a printed board potting piece, after a positioning ring and a potting ring are removed, positioning baffles are fixed to the upper end and the lower end of a clamping handle, and the potting material is fixed to the upper end and the lower end of the clamping handle; the two clamping handles are clamped on the outer sides of the two printed boards through a strong adhesive under the constraint of the two positioning baffles, so that the printed board potting piece and the two clamping handles form a test sample piece; the two positioning baffles are removed, clamping handles at the two ends of the printed board potting piece are pulled outwards through a universal tensile testing machine, tensile force data are recorded till the printed board is separated from the potting material, the tensile force is the maximum when the printed board is separated from the potting material, and the bonding strength is calculated through the tensile force data. The connection mode of the tested piece and the clamping handle through the strong adhesive gets rid of the limitation of the installation space and the structural form, and the application range and the feasibility of interconnection are improved.

The invention discloses a colored high-performance water permeable brick and a preparation method thereof. Bauxite is adopted as coarse aggregate of the bottom layer material, superfine auxiliary cementing materials metakaolin and silica fume are used in a matched mode, the overall strength of the aggregate binder is guaranteed, in addition, a small amount of nanocellulose is added, and the bonding strength between aggregates is further enhanced. The surface layer material adopts quartz sand as aggregate, the binder raw material adopts white cement, metakaolin and white silica fume, and is matched with a powdery concrete coloring agent, and the coloring agent is added into the surface layer mixed material based on an ultrasonic dispersion technology before the brick body is not formed, so that the surface layer of the water permeable brick is uniformly and stably colored. The water permeable brick subjected to pressure forming and curing has good strength, and the high-strength cement-based binder ensures reliable connection among aggregates; the bauxite is used as a high-strength aggregate, so that the strength of the whole water permeable brick is better improved; and the nano cellulose plays a bridging role, so that the overall toughness is improved.

The utility model provides a groove wall self-adaptive expanding and extruding device for lap joint of a composite waterproof blanket, which comprises a vertical rod, a groove wall self-adaptive expanding and extruding device, a groove wall self-adaptive expanding and extruding device and a groove wall self-adaptive expanding and extruding device, one end of each swing arm is connected with the vertical rod, and the number of the swing arms is two; rotating shafts are fixedly arranged at the two ends of the extrusion rollers, the rotating shafts are rotationally connected with the ends, away from the vertical rods, of the swing arms, and the extrusion rollers are located on the two sides of the vertical rods; the two ends of the elastic piece are connected with the rotating shafts on the two sides respectively. The device has the advantages that under the action of elastic force of the elastic part, the extrusion roller extrudes the geotechnical cloth on the two sides, the geotechnical cloth is attached to the inner side wall of the groove, the lap joint position of the two pieces of geotechnical cloth is coated with bentonite paste, the bonding effect and the sealing effect of the lap joint position are guaranteed, the extrusion roller is attached to the side wall of the groove all the time due to the design of the elastic part, and the service life of the groove is prolonged. And the method is suitable for uneven grooves.

The invention discloses a fluorine-containing modified high-performance polyurethane crack pouring adhesive material. The fluorine-containing modified high-performance polyurethane crack pouring adhesive material comprises a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 20 to 35 parts of polyether polyol, 20 to 35 parts of filler, 5 to 10 parts of fluorine-containing modifier, 5 to 10 parts of cross-linking agent, 5 to 10 parts of chain extender, 10 to 20 parts of plasticizer and 2 to 5 parts of diluent; the component B comprises modified isocyanate, and the mass ratio of the component A to the component B is 2: 1. The grouting material has good flowability and is convenient to use in construction and crack pouring; secondly, a fluorine-containing modifier with relatively low surface energy is introduced, so that the surface energy of the material is reduced, and the hydrophobic property is enhanced; finally, a crosslinking agent with a maleic anhydride functional group is adopted, and the adhesion with a mixture is remarkably improved through a grafting reaction on a polymer chain.

The present invention provides a ceramic aluminum-based silicon carbide layered composite material and a preparation method thereof, which relates to the technical field of aluminum-based composite materials, and comprises the following steps: S1: preparing a first ceramic slurry, coating the first ceramic slurry on the surface of an aluminum substrate, sintering through a first pretreatment, and obtaining a first ceramic layer; S2: chemically treating and / or mechanically treating the surface of the first ceramic layer; S3: preparing an aluminum-based silicon carbide slurry, coating the aluminum-based silicon carbide slurry on the surface of the first ceramic layer, sintering in an atmosphere protection, and obtaining an aluminum-based silicon carbide layer; S4: preparing a second ceramic slurry, coating the second ceramic slurry on the aluminum-based silicon carbide layer, sintering through a second pretreatment, and obtaining a second ceramic layer; and cooling to obtain a ceramic aluminum-based silicon carbide layered composite material. The layered composite material prepared by the present invention can effectively improve the fracture toughness and strength of the composite material.