90 results about "Composite strength" patented technology

The invention provides an intelligent temperature control method for a corrugating machine, and belongs to the technical field of corrugated paper products.The intelligent temperature control method comprises the steps that a steam temperature sensor set and a linear speed detection device are installed on a corrugating machine production line, and a speed-steam temperature dynamic compensation mathematical model based on nonlinear regression analysis is established; a feedforward control system architecture is constructed to realize real-time calculation and transmission of a steam temperature compensation value, a double-layer game optimization model is established to coordinate steam energy consumption minimization and composite quality optimization targets, and a self-adaptive adjustment algorithm is started according to composite strength and appearance quality feedback signals to dynamically adjust model parameters. Steam temperature coordination control is implemented to optimize temperature distribution, a steam temperature control effect evaluation system is established for real-time evaluation, and the technical problem that in the prior art, steam temperature dynamic compensation control cannot be achieved according to the speed change of a production line in the production process of the corrugating machine is solved.

The utility model relates to the technical field of paper box production, and specifically to a punching machine for high-composite-strength paper box production, comprising a working platform and an impact drill, a plurality of mounting grooves are symmetrically and evenly arranged on both sides of the top of the working platform, a positioning component for positioning is clamped in the mounting groove, a mounting frame is installed on the top of the working platform, a cylinder is installed on the top of the inner cavity of the mounting frame, a quick-install component is cooperatively installed on the telescopic end of the cylinder, an impact drill for punching is cooperatively installed on the quick-install component, an impact hole is opened in the middle of the working platform, and a control panel is arranged on the side wall of the working platform, and when in use, a second plug-in block is driven to be telescoped in a placement groove by pulling and releasing a pulling block, so that the positioning component is quickly positioned in different mounting grooves, so as to achieve the advantage of changing the size between the positioning components and facilitating the positioning of cardboards of different sizes.

The invention discloses a multi-material composite injection molding method and system, and the method comprises the steps: carrying out laser surface etching on a continuous fiber reinforced substrate to form a microgroove array, and spraying an activator to generate an activated fiber preform; performing infrared partition heating on the marginal area, constructing a temperature gradient field, positioning the marginal area to a mold cavity, injecting engineering plastic melt into a mold, synchronously collecting mold vibration frequency spectrum and infrared thermal imaging data, establishing a mapping relation between vibration dominant frequency characteristics and temperature gradient values, and dynamically regulating and controlling injection molding pressure and pressure maintaining switching time. A foaming elastomer material is injected into a reserved groove position of the matrix-fiber composite blank, a self-foaming reaction is triggered through blank waste heat, and a composite structural part is generated; based on vibration frequency spectrum and infrared thermal imaging data continuously collected in the injection molding process, the process health index is calculated, the product qualification is judged, control over a multi-material interface is achieved by fusing infrared thermal imaging, and efficient and low-consumption production is achieved while the composite strength and the sealing performance are improved.

The utility model discloses a fireproof low-energy-consumption disassembly-free thermal insulation external formwork, which belongs to the field of building materials and comprises a steel wire mesh frame, a thermal insulation board and protective layers respectively arranged on two sides of the thermal insulation board. The steel wire net frame comprises two steel wire net pieces, the two steel wire net pieces are bound and connected at the edge portions through steel wires to form the steel wire net frame, and the heat preservation plate is arranged in the steel wire net frame. According to the fireproof low-energy-consumption non-dismantling heat preservation outer formwork, the protective layers on the two sides are connected through the steel wire net frame, the heat preservation plate is wrapped in the steel wire net frame and the protective layers, the interlayer composite strength of the heat preservation plate and the protective layers is guaranteed, and the strength of the protective layers is improved; more importantly, the steel wire mesh frame structure reduces connecting points between the steel wire meshes on the two sides, the cold and hot bridge effect is reduced, and the excellent effect of reducing energy consumption is achieved.

The invention aims to disclose a high-strength and high-conductivity copper-aluminum-copper composite material and a preparation process thereof, and relates to the technical field of metal composites.The copper-aluminum-copper composite material sequentially comprises a first high-strength copper alloy layer, a first aluminum layer, a second aluminum layer, a third aluminum layer and a second high-strength copper alloy layer from top to bottom; the ratio of the thickness of the first high-strength copper alloy layer to the thickness of the first aluminum layer to the thickness of the second aluminum layer to the thickness of the third aluminum layer to the thickness of the second high-strength copper alloy layer is (0.2-0.3): (0.05-0.07): (0.5-0.7): (0.05-0.07): (0.2-0.3); the cast-rolling composite aluminum alloy plate has the beneficial effects that the first aluminum layer and the third aluminum layer are both made of 8011 aluminum alloy or 1060 aluminum alloy, the first aluminum layer and the first high-strength copper alloy layer have high wettability, and the cast-rolling composite strength is high; the second aluminum layer is made of 7A52 aluminum alloy or 6013 aluminum alloy, has the characteristics of light weight and high strength, and is compounded between the first aluminum layer and the third aluminum layer through hot rolling, so that a high-strength composite interface is formed among the first aluminum layer, the second aluminum layer and the third aluminum layer, and the high-strength and high-conductivity copper-aluminum-copper composite material is formed.

The invention discloses an elastic low-melting cotton fiber and a preparation method thereof, the elastic low-melting cotton fiber comprises hollow inner-layer polyester and surface-layer polyester compounded on the surface of the inner-layer polyester by adopting a treating agent, the raw material of the surface-layer polyester is TPEE, the raw material of the hollow inner-layer polyester is one or more of PET, PBT and PTT, and the treating agent is stearate; the fiber has high hollowness, high compression amount and high resilience amount, after the composite surface of the inner-layer polyester and the surface-layer polyester of the elastic low-melting cotton fiber is treated by a stearate treating agent, chemical connection with higher composite strength can be integrally formed on the composite surface, and the inner-layer polyester cannot be easily torn after being stretched; particularly, the stretching processing performance of the high-hollowness fiber is remarkably improved, so that the hollow fiber still has high compression amount and high compression resilience amount after being stretched under the high-hollowness condition.

The invention discloses polyurethane synthetic leather for vulcanized shoes and a preparation method of the polyurethane synthetic leather. The polyurethane synthetic leather sequentially comprises a cotton-velvet-like base cloth layer, a solvent-free bonding layer, a water-based dry-process middle layer and a water-based dry-process surface layer from inside to outside, the preparation method comprises the following steps: coating water-based dry-process surface layer slurry on release paper, and controlling gradient temperature for drying and curing to form a water-based dry-process surface layer; coating the inner side surface of the water-based dry-method surface layer with water-based intermediate layer slurry, and controlling gradient temperature for drying and curing to form a water-based intermediate layer; the water-based middle layer is coated with solvent-free A / B material resin slurry, and after a high-temperature reaction, the high-density knitted imitation lint base cloth is compounded through a pair roller; the preparation process provided by the invention is simple, green and environment-friendly, and the prepared polyurethane synthetic leather for the vulcanized shoes has high composite strength, high wear resistance and folding resistance, and is suitable for manufacturing the vulcanized shoe leather.

The utility model discloses composite bag production equipment, and relates to the technical field of composite bag production, the composite bag production equipment comprises a rack, a lower hot press roll and an upper hot press roll, the lower hot press roll and the upper hot press roll are used for carrying out a composite process on a first base material and a second base material, fixed columns are fixedly mounted on the rack, a pair of fixed columns is provided with sliding chutes, and sliding rods are arranged in the sliding chutes in a penetrating manner; a lifting assembly is further arranged on the sliding rod and used for adjusting the position of the pressing roller, a pair of supporting columns is fixedly installed on one side of the rack, fixing bases are fixedly installed on the supporting columns, a rectangular frame is rotationally connected between the fixing bases through bearings, and tensioning assemblies are further arranged between the supporting columns and the rectangular frame. The tensioning assembly comprises a pair of tensioning rollers rotationally installed on the rectangular frame and a semicircular gear fixedly installed on one side of the rectangular frame. Compared with the prior art, by arranging the lifting assembly, control over the base material compounding strength by the pressing roller is achieved, and the base material compounding quality is improved.

The invention relates to a metal piece and engineering plastic composite product and a preparation process thereof, in particular to a high-composite-strength metal and engineering plastic injection molding composite product and a preparation process thereof. Through a metal surface treatment process, micron-sized holes are formed in the surface of metal through laser etching, and further surface treatment is carried out on the surfaces of the micron-sized holes, so that strong combination of the metal and engineering plastic is realized. According to the composite product and the preparation process thereof, the technical difficulties that the injection molding bonding strength of a metal part and engineering plastic is not high, a metal part rubber coating mold is difficult to design, and the process environment is not friendly are effectively solved.

The invention is suitable for the field of composite non-woven fabric processing, and provides a composite non-woven fabric hot-rolling film laminating device which comprises a workbench, the workbench is fixedly connected with a hot-pressing box, one side of the hot-pressing box is provided with a supporting frame A, the supporting frame A is connected with two discharging machines used for discharging non-woven fabric and films, and the two discharging machines are connected with the workbench. A corona mechanism is arranged between the feeding machine and the hot pressing box and used for conducting corona treatment on the non-woven fabric and the thin film, and the other side of the hot pressing box is connected with a winding machine used for winding through a supporting frame C. The problem that the interface bonding force is weakened due to uneven temperature distribution in the non-woven fabric film covering process is solved, and the wrinkle defect caused by heat shrinkage of the material is effectively inhibited. Through the synergistic effect of bidirectional gradient heating and stretching, the bonding uniformity of the film and the non-woven fabric is improved, and meanwhile, the composite strength of the edge area of the wide material is enhanced.

The invention relates to the technical field of non-woven materials, in particular to a composite non-woven fabric processing method and system and a composite non-woven fabric. Firstly, the first fiber net layer is subjected to electrostatic treatment, so that the surface of the first fiber net layer is provided with electrostatic charges, then hot melting polymer powder is sprayed on the surface of the second fiber net layer, then the two fiber nets are overlapped, the powder is evenly transferred to the first fiber net layer through the electrostatic adsorption effect to form a pre-composite green body, and then the pre-composite green body is subjected to ultrasonic needling through an ultrasonic needling device. According to the method, accurate distribution and transfer of the powder are achieved through electrostatic adsorption, efficient combination of fibers is achieved at the normal temperature through the synergistic effect of electrostatic adsorption and ultrasonic needling, the structural strength of the non-woven fabric is effectively improved, and the non-woven fabric has the advantages of being simple in preparation process, low in cost and easy to popularize and use. The composite strength of the composite non-woven fabric is improved while the fluffy structure and the inherent characteristics of the raw materials are kept.

The invention discloses an automobile crash dummy skin material composite strength detection device and method, and relates to the technical field of material mechanics analysis, and the automobile crash dummy skin material composite strength detection device comprises a main body support unit, an impact unit, a stretching unit, an alignment unit and a control unit. The main body support comprises a cross beam, the impact unit is provided with an impact force regulation and control assembly with a punch, a clamping structure on the stretching unit is arranged on the cross beam, a two-dimensional translation sliding table bearing belt turntable is arranged below the cross beam, and the alignment system comprises a cross laser projector and a machine vision unit which are arranged on the cross beam. The height of the impact and stretching unit is adjusted by adjusting the height of the cross beam, the impact force is accurately adjusted by the impact unit, and the dynamic force sensor collects mechanical data in real time; and the stretching unit feeds back adaptive clamping force by means of a multi-force sensor, so that the result is prevented from being influenced. The alignment system realizes translation and rotation of a sample through a two-dimensional translation sliding table and a turntable, and laser positioning and machine vision precise position control are combined, so that the dispersion is reduced. The device can accurately detect the impact and tensile composite strength of the polyurethane material, reduce manual intervention and shorten the test time.

The invention relates to high-performance fiber composite fabric production equipment and a process thereof, and belongs to the technical field of composite fabric production. In order to solve the problem that glue bubbles of existing equipment affect quality, the equipment comprises a rack, a discharging roller, a collecting roller, a guide roller, a defoaming mechanism, a flattening mechanism, a scraping mechanism and a glue spraying mechanism. The defoaming mechanism generates hot air through a fan and a heating wire, and the hot air is uniformly blown to glue through a rotatable blowing pipe to promote bubbles to be broken; the dust extraction pipe is matched with the fan to extract fabric batting, so that the composite strength is improved. The process comprises the steps of fabric feeding, glue spraying, strickling, flattening, defoaming and dust removal. According to the scheme, through hot air defoaming, airflow dispersion through rotating the blowpipe and fluff removal, the fabric finished product quality is improved, and the device is suitable for being applied to outdoor clothes, automobile interiors and the like.

The application relates to the technical field of filter materials, and discloses a kind of ultra-low resistance high-efficiency air filter screen material and preparation method thereof, the material includes filter layer, first grid layer that is attached with filter layer and second grid layer that is bonded with filter layer, the surface of second grid layer is provided with adhesive, adhesive includes 30~45 parts low melting point EVA, 5~8 parts high crystalline EVA and 10~20 parts curing agent, curing agent is arranged on the surface of crystalline EVA, and the raw material of curing agent is thiol and epoxy compound with mass ratio 0.16~2.68:1;The curing time of the second grid layer of the material can be extended to 5~10 min when being combined with filter layer, the adhesive can be fully infiltrated on the surface of filter layer when being combined, the composite strength of grid cloth and filter layer can be guaranteed, the influence of adhesive on filter material can be significantly reduced, and the air resistance of filter material can be reduced to 0.5~0.7 Pa.

The invention discloses a special back-drilled composite aluminum foil for a PCB (Printed Circuit Board), which relates to the technical field of composite aluminum foils and comprises an aluminum foil layer, a hot-melt composite layer and a waterproof insulating layer which are sequentially laminated and attached, the hot-melt composite layer is prepared from the following components in percentage by weight: 40%-60% of hot-melt polymer particles, 15%-25% of a stabilizer, 10%-20% of nano reinforced particles and 5%-15% of an inorganic filler; the waterproof insulating layer is prepared from the following components in percentage by weight: 40%-50% of reinforced fiber fabric, 30%-40% of thermosetting resin, 8%-12% of a hydrophobic coupling agent and 8%-12% of nano filler. According to the back-drilled composite aluminum foil special for the PCB, the composite strength is improved, the defect of interlayer stripping is effectively overcome, and the occurrence rate of cloak and entangling is reduced; the waterproof performance is excellent, the moisture absorption problem of a traditional base material is solved, and the back drilling precision and the signal integrity are ensured.

The present invention relates to the technical field of pad processing, and specifically to a flame-retardant paving pad production equipment, comprising: a molding component, the molding component includes a composite bin, one side of the composite bin is provided with a discharge port, the other side is provided with a feed port one and two feed ports two, the open ends of the feed port one and the feed port two are both connected with an extrusion bin; the composite bin is located at one end of a guide frame and is connected thereto, the upper and lower sides of the guide frame are provided with through grooves, and the outer side of the guide frame is provided with a cooling component; the beneficial effect is: by providing a composite bin at one end of the guide frame, the upper and lower surfaces of the pad extruded and molded in the inner cavity of the feed port one can form multiple groups of strip-shaped grooves, which can increase the contact area with other pads, and because the compression belt only fits the uppermost and lowermost sides of the three-layer pad, the surface of the three-layer pad can be quickly cooled and shaped, while the interior still maintains a high temperature, thereby improving the composite strength of the hot melt.

The utility model discloses a heat-insulating anti-aging hose, which belongs to the technical field of hoses and comprises a lining layer, a reinforcing layer, a heat-insulating layer and a protective layer which are sequentially wrapped and fixed from inside to outside. The heat insulation layer is formed by winding and coating an aerogel felt tape outside the reinforcing layer, the aerogel felt tape comprises an aerogel body and a connecting body, and the aerogel body is fixedly connected with the connecting body. The heat insulation layer of the hose is high in composite strength and not prone to delaminating, the heat insulation effect can be effectively achieved for a long time, and the service life of the heated radiation pipe body can be prolonged.

The invention relates to the technical field of composite materials, in particular to a composite material capable of keeping golden appearance of basalt fibers as well as a preparation method and application of the composite material. The composite material provided by the invention contains the transparent thermoplastic material to improve the discoloration problem, so that the golden appearance of the basalt fiber can be well maintained for a long time, and popularization and application of the basalt fiber in the fields of automotive upholstery, bags and the like are facilitated; besides, the problems of discoloration, poor composite strength and the like are solved by adding a thermoplastic material, the discoloration problem is solved by controlling process conditions in the preparation process, and the finally prepared composite material has relatively good durability and does not discolor after being used for a long time; the preparation process is environment-friendly, and the preparation method is simple.

The invention provides a multilayer mixed-color fiber wear-resistant carpet as well as a preparation system, method and application thereof, and belongs to the field of layered resin fiber carpet materials. Polyamide 6 and color master batch are synchronously mixed in different screw extruders to prepare fiber yarns with different colors, the fiber yarns are processed to prepare color-mixed fiber bundles, tufting is continued to obtain a base cloth layer and a pile layer, and different functional layers are continued to be overlaid to prepare the multilayer color-mixed fiber wear-resistant carpet. The mixed-color fiber bundles in the layer structure of the carpet form a high-density cut pile structure after being tufted by a tufting machine, the bulked crimp structure of the mixed-color fiber bundles can endow pile layers with high resilience, the pile layers are not prone to collapse after being treaded for a long time, the appearance flatness is kept, and the composite strength of the carpet is improved through arrangement of different layers.

The utility model relates to the technical field of fabric compositing, in particular to a composite structure for enhancing fabric compositing strength, which comprises a first unwinding component and a second unwinding component. A first fabric unwound by the first unwinding assembly and a second fabric unwound by the second unwinding assembly sequentially enter the compounding assembly and the drying oven and then are wound by the winding assembly, and the spraying assembly is arranged on the upper side of the first fabric between the first unwinding assembly and the compounding assembly. A first box body is arranged on the lower side of the first fabric between the spraying assembly and the compounding assembly, a first negative pressure opening is formed in the upper end face of the first box body, a second box body is arranged on the upper side of the second fabric between the compounding assembly and the drying oven, a second negative pressure opening is formed in the lower end face of the second box body, and extraction openings are formed in the first box body and the second box body; according to the air suction device, the permeation of an adhesive to the fabric can be effectively enhanced, and the composite strength of the fabric is enhanced.

The invention provides a composite material strength parameter inversion method considering an in-situ effect in an ultralow-temperature environment, and the method comprises the steps: obtaining the elastic section test data of a composite material one-way plate and a composite material laminated plate in the ultralow-temperature environment, and employing a composite material finite element model and a particle swarm optimization (PSO) algorithm, taking consistency of a response value of finite element simulation of the composite material and strain response of an elastic section measured by a test as a target, performing inversion to obtain constitutive parameters of the composite material, and establishing a progressive failure model of the composite material in combination with a failure criterion of the composite material and a rigidity degradation model; and finally, according to test data of the damaged sections of the composite unidirectional plate and the composite laminated plate, a composite progressive failure model and a PSO optimization algorithm are adopted, and composite strength parameters are obtained through inversion. The method solves the problem that the strength parameters of the composite material considering the in-situ effect are difficult to accurately obtain in the ultralow-temperature environment, is convenient to operate and accurate in parameter obtaining, can be repeatedly applied, and is used for simulation modeling, strength evaluation and the like of the composite material.

The utility model discloses flame-retardant compression-resistant luggage leather which comprises a base cloth layer, a bonding layer is fixedly compounded on the surface of one side of the base cloth layer, a compression-resistant layer is fixedly bonded on the surface of one side of the bonding layer, a flame-retardant layer is fixedly compounded on the surface of one side of the compression-resistant layer, and a decorative layer is fixedly compounded on the surface of one side of the flame-retardant layer. The interior of the compression-resistant layer is fixedly filled with transverse reinforcing strips, the interior of the compression-resistant layer is fixedly filled with longitudinal reinforcing strips, the longitudinal reinforcing strips are fixedly connected to one sides of the transverse reinforcing strips, the other sides of the transverse reinforcing strips are fixedly connected with connecting strips, and supporting strips are embedded in the compression-resistant layer; the bending positioning strip is arranged on the surface of the supporting strip, the positioning strip is arranged at one end of the supporting strip, the overall composite strength can be enhanced, the compression resistance can be improved, stripping is reduced, the rebounding effect can be achieved through the winding structure, combined use is facilitated, and adaptability is high.

The present invention relates to the technical field of desiccant packaging materials, and in particular to a tear-resistant and moisture-proof desiccant packaging material and a production method thereof. The tear-resistant and moisture-proof desiccant packaging material comprises: a polyester non-woven fabric, and a polypropylene film and a polyethylene film respectively attached to both sides of the polyester non-woven fabric; the raw materials of the polyester non-woven fabric comprise: polyester fibers and prefabricated fibers. The polyester non-woven fabric is prepared by the following specific operations: prefabricated fibers are dispersed on the mesh curtain of the mesh machine to form a bottom layer, and then the polyester fibers are evenly dispersed on the surface of the bottom layer to form an intermediate layer, and then the prefabricated fibers are dispersed on the surface of the intermediate layer to form a surface layer, and then hydroentangled. Theoretically, without glue, hot pressing alone cannot achieve good composite strength. The present invention enhances the strength of the packaging material in a specific way. At the same time, the product is environmentally friendly and efficient, and improves the problems of water seepage and powder leakage of the desiccant packaging material. Compared with products on the market, the present invention has stronger tear resistance and improves the quality of the packaging material.

The application provides a paper-plastic sealing film and a preparation method and application thereof, and relates to the technical field of sealing films.The preparation method of the paper-plastic sealing film comprises the following steps: S1, a single-component polyurethane adhesive is coated on one side of a paper base layer to form a first adhesive layer, a printing layer is first combined with the first adhesive layer, winding is performed, and first aging is performed; S2, a single-component polyurethane adhesive is coated on the other side of the paper base layer to form a second adhesive layer, a polyester film layer is secondly combined with the second adhesive layer, winding is performed, and second aging is performed; and S3, a two-component polyurethane adhesive is coated on the side of the polyester film layer which is not combined to form a third adhesive layer, a polyolefin film is thirdly combined with the third adhesive layer, winding is performed, and third aging is performed.The paper-plastic sealing film prepared by the method has the advantages of improved flatness, excellent composite strength, no delamination, and no bubbles after heat sealing.

The application belongs to the technical field of toilet paper preparation, and particularly relates to water-absorbing and soluble toilet paper and a preparation method thereof, which comprises the following steps: S1, dosing and spreading pulp: long-fiber pulp board and short-fiber pulp board are taken according to a weight ratio to prepare long-fiber pulp and short-fiber pulp; S2, pulp refining: the long-fiber pulp is delivered to a refiner for refining, and the short-fiber pulp is delivered to a fiber defibrator for defibration; S3, pulp mixing: the long-fiber pulp and the short-fiber pulp after the treatment in step S2 are mixed to obtain mixed pulp, then modified inorganic fillers and composite strength improvers are added, water is added to dilute the pulp to a concentration of 0.1-0.3%, the pH of the pulp is adjusted to be less than or equal to 7, and a papermaking base material is obtained; S4, web forming; S5, pressing and drying; S6, doctor blade creping; and S7, winding into paper. The water-absorbing and soluble toilet paper provided by the application has reliable strength in a dry state, can maintain a complete structure in a wet state, and can be quickly dispersed after meeting water.

The present invention relates to the technical field of composite films, and provides a PE light-sealing film and a preparation method thereof, as well as a light-sealing packaging bag composite film. The present invention uses low-density polyethylene and linear low-density polyethylene to blend in the outer layer, which has the characteristics of good processing performance and high composite strength; the middle layer uses medium-density polyethylene and metallocene low-density polyethylene to blend, which has the characteristics of high strength, good stiffness and easy processing; polyolefin-modified α-olefin copolymer is added to the inner layer, and the polyolefin-modified α-olefin copolymer is blended with polyolefin as a modifier, which can achieve the effect of controlling the heat-sealing strength of the film and realize the light-sealing function. The PE light-sealing film of the present invention is used to prepare a light-sealing packaging bag composite film, and the obtained composite film has the characteristics of low heat-sealing strength, easy to tear the seal, no drawing, and no residue, and can be used for the packaging of common daily necessities such as nuts, milk powder and cosmetics.

The invention discloses an aluminum-wood edge-wrapped composite board which comprises a composite board body, the composite board body comprises an upper wrapping aluminum sheet, a lower wrapping aluminum sheet and wrapped double-layer hollow boards, and a filling layer is arranged between the double-layer hollow boards; the double-layer hollow plate comprises an upper wood plate and a lower wood plate, and a supporting cylinder of an I-shaped structure is fixedly installed between the upper wood plate and the lower wood plate through rivets. According to the aluminum-wood edge-covered composite board, the supporting cylinders are supported between the upper wood board and the lower wood board, use of wood is reduced, compositing is firm, the compositing strength is high, and the supporting force is enhanced; the gap between the upper wood board and the lower wood board can be filled with any material and is not affected by toughness, flexibility and adhesion resistance of the material, the thickness can be reasonably selected according to the height of the supporting cylinder, a thicker heat preservation layer can be provided, and softer, lighter and heat preservation foam can be selected as the material. And the strength, the supporting force and the like are not influenced.

The utility model relates to the field of plastic packaging barrels, and discloses a multilayer composite strength polymer plastic packaging barrel which comprises a barrel body, the barrel body comprises an inner barrel, a supporting layer is fixedly arranged on the outer side of the inner barrel, a buffering structure is arranged in the supporting layer, the buffering structure comprises two air cavities which are symmetrical up and down, and the air cavities are communicated with the supporting layer. Springs are fixedly arranged on the inner walls of the upper sides and the lower sides of the two air cavities, pistons are fixedly arranged at the other ends of the springs, the pistons are slidably arranged in the air cavities in a sleeved mode, an anti-collision structure is fixedly arranged on the outer side of the supporting layer, and the anti-collision structure comprises a plurality of anti-collision pipes. The multiple anti-collision pipes are equally divided into an upper group and a lower group, connecting pipes fixedly sleeve the positions, close to the buffering structures, of the anti-collision pipes, and air guide pipes fixedly sleeve the sides, close to the supporting layers, of the connecting pipes. According to the anti-collision bucket, the anti-collision capacity of the bucket body can be enhanced through the cooperation of the anti-collision structure and the buffering structure, the flowing-out speed of liquid is reduced through the flow slowing cover, and splashing is prevented when the liquid is poured out.

The invention relates to the technical field of production of metal and graphite composite self-lubricating materials, in particular to a closed-loop preparation method of a self-lubricating composite material with copper embedded into a graphite hole net, which comprises the following steps: taking graphite powder, corn micro powder and lead powder as raw materials, fully and uniformly mixing all the raw materials according to a proportion, adding a forming agent, and uniformly stirring; placing the parison at the bottom of a crucible in vacuum furnace equipment, covering the parison with a graphite pore plate with holes, and placing a copper block capable of covering the volume of the parison after melting on the graphite pore plate; sintering the parison under vacuum according to a preset heating curve, decomposing and evaporating the corn micro-powder after being heated and expanded to form a through air hole structure, decomposing and carbonizing the forming agent, and connecting with the graphite powder to form the parison with through grids. According to the method, the mesh rate uniformity of the parison is remarkably improved, and higher permeation efficiency and composite strength are provided for subsequent molten copper infiltration; and holes in the parison are further dredged, and the permeability of the molten copper is enhanced.

The invention relates to the technical field of geomembranes, in particular to a multi-layer composite geomembrane and a preparation method thereof, which are used for solving the problems of insufficient anti-seepage performance, mechanical strength, puncture resistance and aging resistance of the existing composite membrane. The geomembrane is of a five-layer composite structure, a fortress layer, an adhesive layer, an anti-seepage layer and an oyster sand surface layer are laminated, hot-pressed and compositely molded through a unique layered structure design and a material formula, so that the geomembrane has excellent mechanical strength and composite strength; the fortress layer provides top layer protection; the carbon black, the light stabilizer and the antioxidant synergistically improve the anti-aging performance; the anti-seepage layer has good anti-seepage performance and serves as a main anti-seepage core, the processing fluidity of the anti-seepage layer is improved through low-density polyethylene, and internal defects are reduced; the nano SiO2 in the sand surface layer provides higher surface hardness and puncture resistance; the adhesive layer firmly combines all the layers through chemical bonding, interface defects among all the layers are eliminated, and good impermeability and adhesive performance are provided.