22results about How to "Improve interlayer bonding performance" patented technology

The invention provides a rigid-flex printed circuit board with an electromagnetic shielding film and a preparation method of the rigid-flex printed circuit board. The rigid-flexible combined board comprises a flexible area and a rigid area connected with the flexible area; the rigid area comprises a rigid sub-board, a bonding sheet, a flexible sub-board, a bonding sheet and a rigid sub-board which are stacked in sequence; the flexible area comprises an electromagnetic shielding film, a covering film, a flexible daughter board, a covering film and an electromagnetic shielding film which are stacked in sequence; the electromagnetic shielding film comprises a conductive adhesive layer, a metal layer and an insulating layer which are sequentially stacked. The metal layer has a concave-convex structure. According to the invention, by adjusting the selection of the electromagnetic shielding film material, the interlayer binding force of the rigid-flexible combined board is improved, and the erosion phenomenon possibly occurring after the flexible area is laminated with the electromagnetic shielding film is avoided; and the preparation method avoids the problems of burrs, electromagnetic shielding film breakage and the like.

The invention discloses a water hammer type molten drop on-demand spraying-laser coaxial composite additive manufacturing device and method, and relates to the field of metal additive manufacturing. A water hammer type molten drop on-demand spraying device and an annular laser light source composed of a plurality of laser units are coaxially integrated, laser power distribution planning is carried out according to a deposition path, and metal component additive manufacturing is achieved through molten drop spraying; and the bonding effect between the adjacent molten drops and the bonding effect between the molten drops and the substrate are improved through coaxial composite laser heating. According to the device and the method, the mechanical property of a component manufactured through the molten drop spraying type metal additive manufacturing method can be improved, meanwhile, the defect that when a single paraxial laser beam is used, the performance of a deposition material is changed due to the fact that the direction of a deposition path is changed is overcome, and due to the use of the water hammer type on-demand spraying device, the device integrated with the annular laser light source is compact in structure; the total volume is small, and the application value is high.

The invention relates to a fiber-containing ceramic product, in particular to a forming die and a forming method of a ceramic matrix composite slender thin-wall shaft part, which are used for solving the problems that an existing preparation method of a ceramic matrix composite slender thin-wall pipe fitting is only suitable for a thin-wall pipe with the diameter smaller than 20mm and cannot meet the requirements of parts with larger sizes; and as the fiber fabric cannot be sewed, the problems of layering and low yield in the forming process are aggravated. The forming mold of the ceramic matrix composite thin-walled shaft part comprises the core mold, the core mold is formed by splicing the multiple sub core molds, demolding operation is simple, the core mold is not affected by sewing fibers when retreating, and the situation that a prefabricated body is layered or cannot be demolded in the demolding process can be effectively avoided.

The invention relates to a preparation method of a high-temperature-resistant, radiation-resistant and stealth multifunctional integrated ceramic matrix composite material. The preparation method comprises the following steps: a, preparing coating slurry containing functional filling particles by ball milling and preparing silicon carbide (SiC) prefabricated cloth by a chemical vapor infiltration (CVI) process; b, uniformly coating the surface of the SiC prefabricated cloth with the mixed slurry, and neatly stacking and fixing; and c, depositing a silicon nitride (Si3N4) matrix on the laminated and fixed prefabricated body by a CVI (Chemical Vapor Infiltration) process for densifying. According to the preparation method provided by the invention, the integration of a high-temperature-resistant, radiation-resistant and stealth multifunctional structure of the ceramic-based composite material is realized, the mechanical property of the ceramic-based radiation shielding material in a high-temperature environment is enhanced, and the multifunctionality and high-temperature environment durability of the ceramic-based composite material are improved; meanwhile, the application range of the ceramic-based composite material is expanded.

The invention is suitable for the technical field of 3D printing, and particularly relates to a method for producing a CF-PPS wire rod with high heat resistance and high dimensional stability, and the method comprises the following steps: carrying out surface modification treatment on carbon fibers to obtain pretreated carbon fibers; the preparation method comprises the following steps: uniformly mixing polyphenylene sulfide, a glycidyl methacrylate grafted modified ethylene-octylene copolymer flexibilizer and glass beads, and putting the mixture into mixing equipment; putting the pretreated carbon fibers into the mixing equipment; feeding plastic is regulated and controlled to control the content of the carbon fibers, extrusion molding is carried out, granulation treatment is carried out, and the carbon fiber reinforced polyphenylene sulfide composite granules are obtained; and extruding and drawing the carbon fiber reinforced polyphenylene sulfide composite granules by a single screw to obtain the CF-PPS wire. The brittleness of polyphenylene sulfide can be improved, the interlayer bonding force of a printed piece can be improved, the prepared wire rod has the characteristics of being tough and not prone to brittle fracture, and the printed piece is low in shrinkage rate, not prone to warping and good in interlayer bonding performance.

The invention discloses a porous carbon graphite plate and a preparation method thereof. The porous carbon graphite plate is prepared from natural flake graphite powder, high-purity silicon powder, mesocarbon microbeads and resin carbon. The preparation process of the porous carbon graphite plate comprises the process links of mixed powder preparation, layer unit pre-forming, high-voltage electrostatic melting 3D printing of an organic matter screen plate, multiple times of repetition, heating and pressurizing secondary forming to obtain a porous carbon graphite plate biscuit, high-temperature sintering to construct a micropore channel, ultrasonic cleaning, drying and the like. The preparation method of the porous carbon graphite plate provided by the invention has the advantages of simplicity, low cost, stability, high efficiency and the like, and is suitable for preparing the porous carbon graphite plate; the obtained porous carbon-graphite plate has the characteristics of high strength, high density, high porosity, controllable pore size and distribution and the like, and can be used for an air floatation transmission device in scenes of supporting and transporting liquid crystal glass substrates and the like.

A heat sink is provided. The heat sink comprises: a film layer; a heat dissipation layer arranged on the film layer and comprising a plurality of through holes; and a first adhesive layer arranged on the heat dissipation layer, the heat dissipation layer comprising a first region, a second region and a third region, the through holes comprising a plurality of first holes arranged in the first region, a plurality of second holes arranged in the second region and a plurality of third holes arranged in the third region, and the average interval between adjacent first holes is smaller than the average interval between adjacent third holes.

This invention discloses a cement-stabilized crushed stone base course material and its construction process, relating to the fields of road engineering and inorganic binder stabilized materials. It includes a load-bearing component A and a moisture-retaining component B, which are mixed separately and laid sequentially. Based on 100 parts by weight of the total dry mass of crushed stone aggregate and mineral shell water-retaining particles in the load-bearing component A, the load-bearing component A comprises 3.8–5.2 parts by weight of silicate cement and 0.4–1.2 parts by weight of mineral shell water-retaining particles. Based on 100 parts by weight of the total dry mass of crushed stone aggregate and mineral shell water-retaining particles in the moisture-retaining component B, the moisture-retaining component B comprises 3.8–5.2 parts by weight of silicate cement and 1.8–4.0 parts by weight of mineral shell water-retaining particles. By placing a larger amount of internal curing water in the upper part of the base course where evaporation is more significant, and placing only a smaller amount of water-retaining particles required for continuous hydration in the lower part of the base course, the effective utilization rate of internal water storage can be improved.

The invention discloses a high-strength power cable which sequentially comprises a special-shaped stranded conductor, a layered tooth-shaped insulating layer, a honeycomb-shaped filling layer, a spiral armor layer and a composite sheath layer from inside to outside. The invention discloses a manufacturing method of a high-strength power cable. The manufacturing method comprises the following steps: S1, manufacturing a special-shaped stranded conductor; s2, forming a layered tooth-shaped insulating layer; s3, assembling the honeycomb-shaped filling layer and the spiral armor layer; and S4, forming the composite sheath layer and processing a finished product. The occlusion type structure of the special-shaped stranded conductor is matched with the graphene modified conductive paste, so that the tensile strength and the structural stability of the conductor are greatly enhanced, and deformation and strand breakage are effectively avoided; the stainless steel wire armor layer which is locked in a reverse spiral mode improves shock resistance and extrusion resistance with high coverage rate and pre-tightening force, and meets flexible laying requirements. And due to the adaptive structure and the wave-shaped design of the composite sheath layer, the interlayer binding force is optimized, and the cable is endowed with excellent wear resistance, aging resistance and bending resistance.

The application discloses a TPU-based damping composite material and a preparation method thereof. The TPU-based damping composite material is composed of two parts of A component and B component arranged alternately, wherein the A component comprises the following components in parts by weight: TPU 1 100; the B component comprises the following components in parts by weight: TPU 2 48~63 phenolic resin, 27~32, filler 10~20; the TPU 1 is a TPU of polyester dihydric alcohol, diphenyl methane diisocyanate (MDI) and 1,4-butanediol (BDO); and the TPU 2 is a TPU of polycarbonate dihydric alcohol (PCDL), diphenyl methane diisocyanate (MDI) and 1,4-butanediol (BDO). The TPU-based damping composite material has a wide effective damping temperature range (tan delta > 0.3) and good mechanical properties; and the preparation method is a continuous process, has high preparation efficiency and low energy consumption.

This invention belongs to the field of metal coating technology, specifically relating to a gradient composite coating, its preparation method, and its application. The composite coating of this invention comprises a multilayer Al3BC / Al composite material coating, wherein the Al3BC content in the Al3BC / Al composite material is 0 wt.% to 80 wt.%, and the Al3BC content increases or decreases sequentially from the inside to the outside of the multilayer coating, wherein the multilayer comprises at least three layers. The gradient Al3BC / Al composite coating of this invention balances high reflectivity, ablation resistance, lateral heat dissipation, longitudinal heat insulation, and low internal stress in laser protection scenarios, as well as high surface hardness, low interfacial stress, and high bonding strength in wear-resistant scenarios. Furthermore, the preparation method of the gradient Al3BC / Al composite coating is simple, with controllable parameters, and suitable for mass production. This invention also provides applications of this coating in the fields of laser protection coatings and wear-resistant coatings.

The invention relates to a production method and a production system of spun-bonded non-woven fabric, and belongs to the technical field of non-woven fabric. A method for producing a spun-bonded nonwoven fabric, comprising a step for melt-spinning a first thermoplastic resin to form continuous crimped fibers, and a step for aggregating the continuous crimped fibers to form a first web and a second web, respectively, a step in which a second thermoplastic resin is melt-blown and spun to form hot staple fibers, and the hot staple fibers are sprayed onto the first web and / or the second web; and a step in which a laminate comprising the first web and the second web is consolidated. The non-woven fabric prepared by the invention comprises two spun-bonded non-woven fabric layers with higher strength and a melt-blown non-woven fabric layer with better filtering performance, and not only has the advantage of good interlayer bonding performance, but also has the advantages of good structural strength of the spun-bonded non-woven fabric and good filtering performance of the melt-blown non-woven fabric.

This utility model discloses a lead frame with extended pins, relating to the field of semiconductor packaging technology. The lead frame includes a base island, a first pin array, and a second pin array. The base island, from top to bottom, includes an electrical shielding layer, a heat diffusion layer, a dielectric isolation layer, a signal transmission layer, a stress conditioning layer, and an interface enhancement layer. The heat diffusion layer is fixed above the electromagnetic shielding layer via interface metallurgical bonding, with its edge extending upwards to form a ring-shaped support platform. The first pin array extends horizontally outwards from the outer wall of the ring-shaped support platform of the heat diffusion layer and extends to the outer side of the base island. The second pin array extends inwards from the central region of the dielectric isolation layer towards the inner side of the ring-shaped support platform. This lead frame with extended pins, through a multi-layer composite base island structure and the coordinated design of the extended pins, achieves performance optimization in electromagnetic shielding, high-frequency signal attenuation reduction, and mechanical strength enhancement.

This invention provides a gradient silicon nitride ceramic femoral head prosthesis and its preparation method, relating to the technical fields of clinical medicine and biomaterials. The femoral head prosthesis is prepared from 88-94 parts of silicon nitride powder, 4-12 parts of sintering aid, 5-20 parts of tungsten carbide titanium, and 0-30 parts of pore-forming agent, wherein the pore-forming agent cannot be 0 parts. The gradient silicon nitride ceramic femoral head prosthesis of this invention retains the advantages of silicon nitride ceramics—low wear, low friction, high strength, high fracture toughness, and good chemical stability—at the interface between the femoral head prosthesis and the liner, while reducing wear on the titanium alloy femoral stem cone caused by the large hardness difference between the femoral head prosthesis and the liner. This reduces the incidence of organ toxicity, periprosthetic osteolysis, and aseptic loosening caused by metal wear debris, improves the survival rate of the femoral head prosthesis and the femoral stem cone, reduces the revision rate of replacement surgery, and saves patients' treatment costs.

The invention discloses a wear-resistant weather-resistant high-strength flame-retardant multi-layer co-extrusion woven fabric and a preparation method thereof. The woven cloth comprises a polyethylene glycol terephthalate (PET) layer and polyamide (PA) layers arranged on the upper surface and the lower surface of the PET layer, and the mass ratio of the PET layer to the PA layers is (38-42): (58-62). The PET layer comprises PET master batch, PTFE powder and a dispersing agent; the PA layer comprises PA particles, a flame retardant, a bridging agent, PTFE powder, an anti-ultraviolet agent and an antioxidant. The preparation method comprises the following steps: carrying out drying pretreatment on the PET master batch and the PA particles; respectively blending with corresponding auxiliaries to obtain pretreated master batches; melting and co-extruding the two pre-treated master batches at 180-265 DEG C, and cooling and drafting to obtain co-extruded flat filaments; and finally weaving into cloth. The obtained woven cloth has excellent wear resistance, weather resistance, high strength and flame retardance.

The invention relates to a composite metal foil with high peel strength, a metal-clad laminated plate and a battery. The high-peel-strength composite metal foil comprises a base film layer and a metal layer, the metal layer is arranged on at least one side face of the base film layer, a plurality of protrusions are arranged on the side face, close to the base film layer, of the metal layer, the height of the protrusions is 0.5-5 micrometers, the protrusions comprise the first protrusions and the second protrusions, the height of the first protrusions is 1.5-5 micrometers, the height of the second protrusions is 1.5-5 micrometers, and the height of the second protrusions is 1.5-5 micrometers. The height of the second protrusions ranges from 0.5 micrometer to 1.5 micrometers. Wherein the second protrusions are arranged between at least 40% of the adjacent first protrusions. The overall design is beneficial to improving the interlayer binding force between the metal layer and the base film layer, the delamination resistance of the composite metal foil can be improved, the working safety of the lithium battery can be improved, meanwhile, the bonding stability of a circuit and the metal foil can be improved when the composite metal foil is used for circuit manufacturing, and the circuit manufacturing quality can be improved.

The utility model discloses a device for staggered embossing of paper handkerchiefs, which comprises a rack, a surface roller and a bottom roller, the surface roller and the bottom roller are erected on the rack, surface roller raised embossing points, line segments and raised bearing platforms are respectively arranged on the surface of the surface roller and the surface of the bottom roller in a staggered manner, and bottom roller raised embossing points, line segments and raised bearing platforms are respectively arranged on the surface of the surface roller and the surface of the bottom roller in a staggered manner. When the paper handkerchief is embossed, the embossing of the surface roller and the convex bearing platform of the aligned bottom roller as well as the embossing of the bottom roller and the convex bearing platform of the aligned surface roller simultaneously extrude and emboss the two surfaces of the paper handkerchief. The surface roller and the bottom roller are in transmission through the synchromesh gear, a kidney-shaped hole is formed in the bottom roller synchromesh gear, and the relative position of the bottom roller synchromesh gear and the bottom roller can be adjusted, so that the embossing positions of the surface roller and the bottom roller are aligned. According to the device, good interlayer combination of the paper handkerchief can be guaranteed, attractive embossed patterns arranged in a staggered mode can be generated, and meanwhile the paper surface can be kept flat and free of deformation.

The invention belongs to the technical field of batteries, and provides a composite metal lithium negative electrode, a preparation method thereof and a battery, the composite metal lithium negative electrode comprises a metal lithium base layer, and a first passivation layer, an intermediate polymer layer and a surface barrier layer are sequentially arranged in the thickness direction of the metal lithium base layer; the first passivation layer comprises lithium sulfide and an organic sulfur derivative; the middle polymer layer comprises a first polymer matrix, a lithium salt and a functional additive; the surface barrier layer comprises a second polymer matrix and an inorganic solid electrolyte. By arranging the first passivation layer, the middle polymer layer and the surface barrier layer on the metal lithium base layer, a gradient functionalized multi-layer synergistic protection structure is formed, a closed loop mechanism of chemical passivation-ion regulation-physical barrier is realized, and the problems of SEI film stability, lithium ion uniform transmission and dendritic crystal growth are solved.

The invention provides a decorative material, a preparation method thereof and electronic equipment. The decorative material comprises a base body; the transition layer is arranged on one side of the base body; the color layer is arranged on the side, away from the base body, of the transition layer; the connecting layer is arranged on the side, away from the transition layer, of the color layer; the coating layer is arranged on the side, away from the color layer, of the connecting layer; the coating layer comprises a plurality of sub-coating layers which are sequentially stacked, the sub-coating layer, close to the connecting layer, in the plurality of sub-coating layers is a first sub-coating layer, the thermal expansion coefficient of the first sub-coating layer is 3 * 10 <-6 > / K-6 * 10 <-6 > / K, the thermal expansion coefficient of the connecting layer is 5 * 10 <-6 > / K-10 * 10 <-6 > / K, and the thermal expansion coefficient of the first sub-coating layer is smaller than that of the connecting layer. Therefore, the decorative material can achieve the colorful effect, meanwhile, the binding force between the layers of the decorative material can be guaranteed, and the problem that the film layer falls off in the using process is solved.

The utility model discloses a light combined bridge deck slab structure which is characterized in that the light combined bridge deck slab structure comprises a steel beam and a combined deck slab arranged on the top face of the steel beam, and the combined deck slab comprises an asphalt surface layer, a high-viscosity high-elasticity modified asphalt stress absorbing layer, an ultrahigh-toughness concrete layer and a steel deck slab which are sequentially arranged from top to bottom; the section of the steel beam is a PK section. The utility model has the advantages of simple structure, good durability, high rigidity, light structure and large span.

The present invention discloses a method for preparing a highly biologically active brushite / β-tricalcium phosphate bone tissue engineering scaffold, comprising the following steps: step 1, fully mixing malic acid-modified hydroxyapatite with β-tricalcium phosphate and anhydrous calcium dihydrogen phosphate to obtain brushite / β-tricalcium phosphate composite powder; step 2, uniformly mixing the brushite / β-tricalcium phosphate composite powder obtained in step 1 with a water-soluble non-aqueous liquid phase to obtain a precursor slurry; then blending the precursor slurry with distilled water to obtain a brushite / β-tricalcium phosphate composite slurry; step 3, extruding the brushite / β-tricalcium phosphate composite slurry obtained in step 2 at room temperature in one step by 3D printing to obtain a brushite / β-tricalcium phosphate bone tissue engineering scaffold. The present invention has the advantages of excellent biological activity and cell activity, and can be extruded at room temperature in one step by 3D printing.