276results about How to "Good dimensional stability" patented technology

This invention discloses a method for preparing high-purity oxygen-free copper, relating to the field of metallurgical technology. The method includes multi-stage electrolytic refining, gradient-heating vacuum melting, inert gas-protected refining, electron beam melting, hydrogen plasma arc melting, directional solidification, and post-treatment steps. The multi-stage electrolytic refining utilizes a specific component electrolyte and periodically commutated current; vacuum melting is combined with bidirectional electromagnetic stirring; inert gas-protected refining is combined with a gradient reduction composite covering agent; electron beam and hydrogen plasma arc melting achieve deep purification and deoxidation; and directional solidification and two-stage annealing ensure product performance. The high-purity oxygen-free copper prepared by this invention has a conductivity of 102.3% IACS, a copper content ≥99.9999%, and an oxygen content <1.0 ppm. It exhibits high purity, low oxygen content, and excellent conductivity. The process is stable and controllable, making it suitable for high-end electronics applications.

The invention discloses a polyhydroxyalkanoate composition and a preparation method thereof. The polyhydroxyalkanoate composition comprises the following components in parts by mass: 100 parts of polyhydroxyalkanoate; 0.5 to 5 parts of unsaturated D-polylactic acid; 0.5 to 5 parts of poly (L-lactic acid); the preparation method comprises the following steps: S1, carrying out melt blending on the polyhydroxyalkanoate and the unsaturated D-polylactic acid, and enabling the polyhydroxyalkanoate and the unsaturated D-polylactic acid to fully react, so as to obtain an intermediate product; and S2, carrying out melt blending on the intermediate product obtained in the step S1, poly-L-lactic acid and an ester exchange inhibitor to finally obtain the polyhydroxyalkanoate composition with excellent thermal stability, high melt strength and high crystallization speed.

The invention discloses a thermoplastic engineering plastic and a preparation method thereof, and the thermoplastic engineering plastic comprises the following components by weight: 83-93% of ABS resin, 3-10% of flake alumina and 3-4% of a processing aid; wherein the surface of the flaky aluminum oxide is connected with a lipophilic group. According to the invention, the surface-modified flaky aluminum oxide is adopted as a functional filler and is compounded with the ABS resin to prepare the ABS thermoplastic engineering plastic, and the flaky aluminum oxide can realize single-sheet stripping after being subjected to surface treatment, so that the characteristics of portability, impact resistance, weather resistance and great improvement of dimensional stability can be achieved only by using 3-10% of additive amount; meanwhile, the production cost of the ABS plastic and the increase amplitude of the overall weight are reduced due to the low filler addition amount, and no obvious adverse effect is generated on the mechanical property of the plastic; the preparation method does not need to change the forming processing technology of the existing ABS plastic, the production cost is low, and the product can be recycled.

The utility model discloses a kind of polytetrafluoroethylene section bar production molds, including upper receiving part and lower forming part, upper receiving part and lower forming part are detachably connected, lower forming part includes cavity part and support part, cavity part is located inside support part and both outer wall and inner wall abut, cavity part and support part are also detachably connected. The mold is designed as detachable structure by upper receiving part and lower forming part, cavity part and support part, realizes the modularization replacement of component, without integral replacement mold can be adapted to different shape or size section bar production, reduce replacement cost and shorten replacement time, while the abutment support of support part to cavity part can effectively reduce cavity deformation in high-pressure moulding process, improve the forming precision and production efficiency of polytetrafluoroethylene section bar, applicable to the production demand of many varieties small batch.

This invention discloses a high-wear-resistant polyetherimide composite material, its preparation method, and its applications. The high-wear-resistant polyetherimide composite material comprises the following components by weight: 60-90 parts polyetherimide, 10-40 parts polyketimide, 1-5 parts antioxidant, 10-20 parts hollow glass microspheres, and 5-10 parts toughening agent. The high-wear-resistant polyetherimide composite material is prepared by compounding the two polymers and simultaneously adding wear-resistant additives. The composite material prepared by this invention achieves a Rockwell hardness of over 105 and possesses excellent mechanical properties, making it suitable for application in high-temperature and wear-resistant aerospace fields.

The invention provides a low-water-absorption glass bead modified PBT (polybutylene terephthalate) material and a preparation method thereof. The low-water-absorption glass bead modified PBT material comprises the following components in parts by weight: 70-100 parts of PBT resin; 0 to 30 parts of solid glass beads; 0-5 parts of a toughening agent; 0-2 parts of an antioxidant; 0-2 parts of a lubricant; 0-2 parts of black color master batch; 0-2 parts of a coupling agent; 0-5 parts of polytetrafluoroethylene wax; wherein the average particle size of the solid glass beads is 1-50 [mu] m; the average particle size of the polytetrafluoroethylene wax is 3-15 [mu] m, and the weight-average molecular weight of the polytetrafluoroethylene wax is 10000-30000 g / mol; the weight ratio of the solid glass beads to the polytetrafluoroethylene wax is (5-10): 1. According to the invention, the polytetrafluoroethylene wax is added into the solid glass bead modified PBT material, so that the shrinkage difference between the material flow direction and the vertical flow direction is effectively reduced, the water absorption rate of the material is remarkably reduced, the preparation process is simple, and the production process is easy to control.

The application provides a mold partition heating control method for electric energy metering box production, comprising: obtaining a three-dimensional model of a multi-table position partition intersection area and an adjacent thin-walled area in a mold cavity of electric energy metering box production, calculating a volume ratio of corresponding mold steel materials of the two areas, and identifying a thermal inertia difference caused by a thick-thin transition interface; inputting the thermal inertia difference and a preset initial heating power into a support vector regression machine to predict a transient temperature difference zone formed between the intersection area and the thin-walled area in a heating stage, and extract a maximum temperature difference peak and valley and a time period when the maximum temperature difference peak and valley occur; evaluating resin local overheating and thin-walled solidification risk through the maximum temperature difference peak and valley, determining a first heating power according to the evaluated risk; analyzing an influence of a mismatch between a pushing speed of the intersection area and a pushing speed of the thin-walled area on residual internal stress accumulation at the multi-table position partition intersection, evaluating power redistribution requirements accordingly, and generating an output power distribution scheme of each independent heating circuit.

The application provides a high-refraction cycloolefin copolymer and a preparation method thereof, and has a structure of formula I. The cycloolefin copolymer can obtain a cycloolefin copolymer resin with high thermal stability due to high steric hindrance of the cycloolefin monomer. The refractive index of the cycloolefin copolymer resin is greatly improved due to R3 and R4 on the cycloolefin monomer, and is first broken through to above 1.70, while maintaining high light transmittance of 91.0-96.0%, extremely low water absorption (<0.01%), and a glass transition temperature of 219 DEG C. The application prepares the cycloolefin copolymer resin with high activity, adjustable molecular weight and glass transition temperature by adjusting the reaction conditions. The copolymer resin has high refractive index, high light transmittance, heat resistance, low birefringence and moisture absorption, excellent fluidity, moldability and dimensional stability.

The utility model relates to a spinning equipment technical field, concretely to a hollow silk spinning equipment, including the shell, be provided with extrusion mechanism on the shell, the extrusion mechanism includes: the input slot, the input slot is set up on the inner wall of shell, the inner wall of shell is fixedly connected with hollow block, the inner wall of hollow block is provided with mixing chamber, the inner wall of hollow block is provided with the hole ring block, the bottom of hollow block is fixedly connected with ring type cylinder, the top of hollow block is fixedly connected with trachea, the inner wall of hollow block is seted up with the air -jet mouth. The utility model discloses the extrusion mechanism is set up, and the two layers of mesh round disc of hole ring block are used to melt forcedly divide into multiple thin small stream bundle and cross confluence, effectively reduce the problem that material distribution is uneven, and nitrogen is injected to the middle part of blank simultaneously through trachea and forms rigid support, prevent high temperature melt from collapsing because of low self -strength, ensure that blank maintains the preset big hollow form.

This invention provides a composite solid-state electrolyte membrane and its preparation method, relating to the field of lithium battery technology. It comprises the following components in parts by weight: 15-25 parts flame-retardant microcapsules with a core-shell structure; the shell being EDTA-modified LATP nanoparticles and the core being expanded monomers; 20-30 parts amino-modified carbon nitride; 60-80 parts bacterial cellulose membrane; and 40-60 parts polyethylene oxide particles. The composite electrolyte membrane exhibits high thermal stability and dimensional stability. The uniform deposition of each component in the microstructure forms a continuous phase, providing a rapid channel for ion migration and conduction, significantly improving battery performance and safety.

The utility model belongs to the technical field of decoration material relates to a multilayer heterochromatic composite structure's floor, including the surface decorative layer, and the composite substrate layer and the back balance layer of downward in turn, be equipped with first glue layer and second glue layer between each layer of composite substrate layer, the composite substrate layer is by three layers and above -mentioned super -thin moisture -proof density board, PVC carbon crystal board and inorganic straw board base material layer group billet and is formed, the colour of each base material layer is red, black, xylophone colour, blue, green, yellow, brown etc. The utility model discloses the composite substrate layer structure is by the super -thin moisture -proof density board, PVC carbon crystal board, inorganic straw board of different colour combination and is formed, has strong stability, surface level, is not easy to crack deformation, and the characteristics such as suitable ground heating environment. The floor disclosed effectively combines the advantages of various substrates, and is superior to ordinary floor in size stability, heat and moisture resistance, fire resistance, corrosion resistance, etc. The cost is reduced, and the product added value is obviously improved.

This invention discloses a traction winding and unloading device, belonging to the field of roll material production technology. The device includes a traction device, a floating fly knife device, a dual-shaft alternating winding device, and an unloading device. The traction device has edge trimming and tension adjustment functions. The floating fly knife device is equipped with a floating roller assembly and an L-shaped flipping guide groove to achieve clamping traction during cutting and automatic knife lifting after cutting. The dual-shaft alternating winding device realizes alternating winding of the two air-expanding shafts at two workstations through a flipping disc and a clamping assembly, and is equipped with a moving pressure roller that adjusts with the roll diameter. The unloading device consists of a moving trolley, a shaft pulling device, and an unloading trolley, which can automatically complete full roll grabbing, shaft pulling, air release unloading, and transfer. This invention realizes full-process automation from traction, edge trimming, fixed-length cutting, continuous winding to automatic unloading, and has the advantages of high production efficiency, good cutting and winding accuracy, stable operation, and wide applicability. It is suitable for the continuous production of roll materials such as film, non-woven fabric, paper, and aluminum foil.

The present application relates to magnesium alloy rod processing equipment technical field, specifically for magnesium alloy rod peeling processing device, including horizontal lathe, the horizontal lathe is provided with auxiliary disc and thimble, further including at least two interval arrangement in the same straight line support assembly, each support assembly is arranged between the auxiliary disc and thimble, each support assembly includes support frame, arc-shaped support plate and at least three steel balls, the lower end of the support frame is fixedly connected to the horizontal lathe, the arc-shaped support plate is arc-shaped and is in the upper opening structure, and the upper end of the corresponding support frame is connected to the inner side of the corresponding arc-shaped support plate, and each steel ball is uniformly distributed, and is rotatably connected to the corresponding arc-shaped support plate. The present application can improve the current magnesium alloy rod clamping machining mode, the problem that the magnesium alloy rod may appear axial deviation, leading to the problem of increased peeling size error.

The invention belongs to the technical field of polyurethane compositions, and particularly relates to all-water foaming stone-like polyurethane foam as well as a preparation method and application thereof. The all-water foaming stone-like polyurethane foam is composed of a component A and a component B in a mass ratio of 1: (1-1.15), and the component A comprises the following raw materials: polyether polyol 1, polyether polyol 2, polyether polyol 3, a composite catalyst, a flame retardant, a surfactant and water; and the component B is polymethylene polyphenyl isocyanate. According to the all-water foaming stone-like polyurethane foam provided by the invention, polyethers with different viscosities are combined and cooperate with different types of catalysts, and an all-water foaming mode is adopted, so that the fluidity of a system is improved, the characteristic of rapid curing is maintained, bubbles on the surface of a product can be effectively eliminated, and the performance of the product is improved. The hard polyurethane product with clear texture and flat and stone-like surface is obtained; the invention also provides a preparation method thereof.

The invention discloses a strain rate sensitive composite foam material and a preparation method thereof, and relates to the technical field of high polymer materials, and the preparation method comprises the following steps: mixing hydroxyl-terminated polydimethylsiloxane, thermoplastic polyurethane powder, a microsphere foaming agent, boric acid and a derivative thereof, and foaming in a temperature range of 65-120 DEG C to obtain the strain rate sensitive composite foam material, the mass ratio of the hydroxyl-terminated polydimethylsiloxane to the thermoplastic polyurethane powder is within the range of 1: (1-10); the addition amount of the microsphere foaming agent is 0.02-15wt% of the total mass of the foaming powder; the molar weight of the boric acid and the derivative thereof is 1-10 times of the molar weight of the hydroxyl-terminated polydimethylsiloxane; the strain rate sensitive composite foam material prepared by the invention has good size and structural stability, good strain rate effect and impact energy absorption effect, and the preparation method is simple.

The invention relates to the technical field of building waterproof composite materials, in particular to an organic silicon modified resin building waterproof composite material and a preparation method thereof. Comprising a waterproof roll and a waterproof coating arranged on the surface of the waterproof roll, the waterproof coating is prepared from the following components in parts by weight: 20 to 32 parts of silane modified polyether, 15 to 30 parts of organic silicon modified resin, 5 to 10 parts of polysaccharide-based composite polylactic acid, 8 to 12 parts of plasticizer, 1 to 3 parts of curing agent, 0.5 to 2 parts of titanium dioxide and 0.5 to 3 parts of water removal agent. An organic silicon structure in the prepared waterproof composite material has the characteristic of low surface energy, so that the surface of a coating presents strong hydrophobicity, and liquid water permeation is effectively blocked; the waterproof coating can be matched with a compact cross-linked network structure to form a continuous and seamless waterproof film, realizes high hydrostatic pressure resistance and low water absorption, and is suitable for key waterproof parts such as roofs, basements and toilets.

The invention discloses an oil cooler space ring and a high-precision manufacturing method thereof.The oil cooler space ring comprises an annular body, an oil through hole is formed in the center of the annular body, four positioning bosses are evenly distributed at one end of the annular body in the circumferential direction, and a first sealing groove is formed in the peripheral face of the annular body; a second sealing groove is formed in the inner circumferential face of the annular body, a thread auxiliary groove is formed in the oil through hole, a flow guide groove is formed in the end, away from the positioning boss, of the annular body and distributed in a spiral shape, the positioning boss is used for axial positioning and circumferential positioning of the space ring in the oil cooler, and the assembly precision is guaranteed. The flow guide grooves are formed in the end face of the annular body and distributed in a spiral shape, the number of the flow guide grooves is six, the spiral flow guide grooves can guide a cooling medium to form ordered spiral flow on the surface of the space ring, the contact area of the cooling medium and the space ring is increased, the contact time of the cooling medium and the space ring is prolonged, and therefore the heat exchange efficiency is improved.

The invention relates to the technical field of artificial board processing, in particular to a preparation method of green low-toxicity flame-retardant plywood. The method comprises the following steps: S1, green synthesis and step-by-step dipping treatment of a complexing phosphorus-nitrogen flame retardant; s2, preparation of a flame-retardant adhesive and construction of an interface intumescent flame-retardant system; s3, stepped layered assembly and hot press molding; s4, conducting ion regulation and anti-rust treatment; wherein the complexing phosphorus-nitrogen flame retardant in the step S1 takes phosphorus and nitrogen as core flame-retardant elements and is synthesized through a complexing rapid reaction and cross-linking reaction technology, the reaction temperature is 80-100 DEG C, and the reaction time is 30-60 minutes; the mass ratio of the phosphorus-containing metal complex precursor to the nitrogen source compound to the chitosan to the catalytic substance is (2-3): (5-6): (1-3): (0.5-1). According to the flame-retardant plywood prepared through the method, the combustion rate growth index is smaller than 100 W / s, the 600-s total heat release amount is smaller than 7.0 MJ, the smoke generation rate index of the smoke generation characteristic is smaller than or equal to 30 m / s, the 600-s total smoke generation amount is smaller than or equal to 50 m, and multiple technical defects of traditional flame-retardant plywood are overcome.

This invention discloses a highly corrosion- and weather-resistant silicate glass material and its preparation method, comprising the following components by weight: 60-80 parts of a main network component, which forms a silicon-oxygen network framework after melting; 5-15 parts of a network-modifying component, which is distributed within the silicon-oxygen network framework; 5-12 parts of a lattice-stabilizing component; 2-8 parts of a compacting reinforcing component; and 3-10 parts of a lattice-strengthening component, which are dispersed within the silicon-oxygen network framework to form a dense silicate glass matrix. This invention can improve the weathering resistance, groundwater erosion resistance, and long-term structural stability of the glass material, and enhance the internal purity and density of the glass matrix, meeting the needs of deep underground burial and long-term information preservation applications.

This invention relates to the field of polymer materials technology, specifically to a method for preparing and applying a rigid polyimide foam reinforced with aluminum honeycomb. The method for preparing the rigid polyimide foam reinforced with aluminum honeycomb provided by this invention includes steps such as surface pretreatment of the aluminum honeycomb core material and fixing the pretreated aluminum honeycomb core material into a molding die. The rigid polyimide foam material reinforced with aluminum honeycomb obtained by this invention not only possesses high specific strength and high specific stiffness, but also inherits the excellent properties of polyimide foam such as high temperature resistance, flame retardancy, low smoke, and thermal insulation. The introduction of the aluminum honeycomb skeleton also improves the material's impact resistance and dimensional stability, making it an ideal multifunctional integrated lightweight structural material with promising application prospects.

The invention relates to the technical field of drying ovens for processing, and discloses a drying oven for water-based PU leather processing and a drying method.The drying oven comprises a preheating cavity and a primary drying cavity formed in one side of the preheating cavity, a main cavity is fixedly assembled on the side, away from the preheating cavity, of the primary drying cavity, and a final drying cavity is fixedly assembled on the side, away from the primary drying cavity, of the main cavity; a sliding rail mechanism is fixedly mounted on the inner side wall, perpendicular to the primary drying cavity, of the preheating cavity, a winding roller is slidably assembled on the side, away from the preheating cavity, of the sliding rail mechanism, and a medium-wave infrared lamp tube is fixedly mounted at the top end, facing the winding roller, of the interior of the preheating cavity. A first lamp tube set is fixedly installed on the inner side wall, perpendicular to the medium-wave infrared lamp tube, of the primary drying cavity. According to the invention, a sectional structure of the preheating cavity, the primary drying cavity, the main cavity and the final drying cavity is adopted, and differential heating assemblies of all the cavities are matched, so that a gradient drying process is realized, and the defects caused by rapid drying of a single cavity are thoroughly avoided.

This invention relates to the field of high-temperature alloy investment casting technology, and discloses an inert ceramic core for high-temperature alloy hollow castings and its preparation method. The preparation method includes the following steps: using yttrium-stabilized zirconia as the matrix material, yttrium oxide powder as a mineralizer, alumina-toughened zirconia powder as a toughening agent, yttrium aluminum garnet powder as an additive, and thorium oxide as a grain inhibitor, the above powders are mixed evenly, a paraffin-based plasticizer is added, and the mixture is vacuum stirred to form a slurry with fluidity and thermoplasticity; the slurry is added to a hot-pressing core-casting machine, and a core blank is prepared using the hot-pressing method; the core blank is embedded with sand and then sintered at high temperature, and cleaned after sintering to obtain the ceramic core. This invention improves the chemical inertness, high-temperature strength, and dimensional stability of the ceramic core through the synergistic effect of yttrium-stabilized zirconia, yttrium oxide powder, alumina-toughened zirconia powder, yttrium aluminum garnet powder, and thorium oxide, making it suitable for the internal cavity forming of high-temperature alloy hollow castings.

The present application relates to the technical field of high-temperature-resistant electronic components, and particularly relates to a high-temperature-resistant electronic component, which adopts the following technical scheme: a frame body is provided with a glue-filling sealed electromagnetic coil at the center of the frame body, and the frame body is made of high-temperature-resistant plastic material; a manufacturing process of the high-temperature-resistant electronic component comprises the following steps: S1, selecting a suitable coil body and an outer frame with a pin; S2, sealing the middle part of the coil body in the outer frame to provide mechanical support, heat dissipation and electrical connection; and S3, connecting the coil motor and the inner lead of the outer frame by using a fine metal wire (gold wire, aluminum wire or copper wire) to realize electrical conduction. The molten material in the discharge bucket can be dispersed into different cavities respectively, and the bubbles in the dispersed molten material are more easily extracted, so that the residual bubbles in the molten material are reduced.

The application discloses a kind of double-wrapped wool synthetic fiber high count high strength cotton spinning and its preparation method and application, belong to textile technical field.The method includes wool pretreatment, opening, carding, drawing, roving, spinning (add the first synthetic fiber filament), bobbin, doubling and twisting reverse wrapping (add the second synthetic fiber filament) and the like steps.The application adopts two synthetic fiber filaments to cross double-wrapped processing to wool or wool and synthetic short fiber blended yarn, and adopts positive and negative direction twisting direction combination in spinning and twisting process, effectively eliminates internal stress of yarn, eliminates yarn setting process.The prepared yarn is high in strength, has less hair, and even in evenness, can solve the problems of low production efficiency and poor yarn quality of high-count wool blended yarn, and is suitable for weaving processing of thin high-grade fabrics.

The utility model relates to a GRPS composite outer formwork, and belongs to the technical field of outer formwork production. Comprising formwork bodies, when every two adjacent sets of formwork bodies are spliced, splicing seams of Z-shaped groove structures are formed between lap joint protruding heads A and lap joint protruding heads B on different formwork bodies, each formwork body is of a multi-layer structure and comprises a heat preservation layer and a heat preservation transition layer, and an outer side bonding layer is arranged between each heat preservation layer and the corresponding heat preservation transition layer. An inner side bonding reinforcing layer is arranged on the inner side face of the heat preservation layer, an outer side reinforcing protective layer is arranged on the outer side face of the heat preservation transition layer, and the heat preservation layer is a GRPS heat preservation plate. The GRPS composite outer formwork has the advantages that the GRPS composite outer formwork is made of the GRPS heat preservation plate, due to the fact that the GRPS heat preservation plate is of a micro closed-cell structure and is combined with the pressing extrusion technology, the GRPS composite outer formwork has excellent weather resistance, durability and dimensional stability, is suitable for severe environments, retains the characteristics of light weight and easy construction of polystyrene and is suitable for ultra-low energy consumption buildings.

This invention discloses an impact-resistant plastic granule and its preparation method, belonging to the technical field of polyamide modified materials. The preparation method includes the following steps: raw material drying pretreatment, premixing and activation treatment, overall material blending, twin-screw oriented melt extrusion, cooling granulation, and post-treatment sieving. A twin-screw extruder, combined with a stretching die, induces hydroxyapatite (HAP) nanowires to orient orderly along the melt flow direction, forming a biomimetic enamel-like framework structure. Simultaneously, utilizing the B-N coordination between the terminal amino groups of polyamide and boric acid, and the dehydration esterification reaction of the terminal hydroxyl groups introduced by the hydroxylated graft compatibilizer with boric acid and HAP surface hydroxyl groups, dynamic borate ester covalent bonds and B-N coordination bonds are generated in situ, supplemented by Ca coordination bonds and hydrogen bonds to construct a multi-interface bonding system. This invention completely eliminates the use of elastomer toughening agents, increasing the notched impact strength of the cantilever beam from 5 kJ / m of pure PA6 to 12–15 kJ / m, and the flexural modulus from 2.5 GPa to 3.2–3.8 GPa, achieving a simultaneous improvement in rigidity and toughness.

This invention belongs to the field of engineered wood products manufacturing, specifically a method for preparing low-formaldehyde finger-jointed boards based on bio-based modified adhesives. The method includes preparing an adhesive composed of modified soybean protein, non-formaldehyde crosslinking agents, micro / nano cellulose, nano-silica, and epoxidized vegetable oil elastomers; pre-treating the wood and cutting the finger joints; applying a sealing liquid via atomization for end-face damping treatment; performing quantitative adhesive application and stepped butt joint molding; and employing a multi-stage hot-pressing process involving preheating penetration, high-temperature curing, and cooling and pressure holding. Through the above technical solution, this application can achieve the formation of a dense adhesive film at the finger joint interface, significantly improving bonding strength and stability while reducing formaldehyde release.

The invention relates to the technical field of composite films, in particular to a flame-retardant composite film and a preparation method thereof. The composite film is of an ABA type symmetrical three-layer co-extrusion structure, and functional division and synergistic interaction are achieved by concentrating a main flame-retardant function on a core layer (B layer) and distributing hydrolysis resistance and mechanical enhancement functions on a surface layer (A layer). The layer A comprises crystalline polyester, reinforcing master batch and an interface reinforcing agent; the layer B comprises crystalline polyester and composite flame-retardant master batch; the preparation method mainly comprises the following steps: respectively preparing the reinforced master batch and the composite flame-retardant master batch; respectively mixing the raw materials of the layer A and the layer B, drying and melting; co-extruding and casting through a three-layer co-extrusion die head with gradient temperature field control, and quenching a cast sheet; and preheating the cast sheet, and then carrying out synchronous two-way stretching, heat setting and cooling rolling. The film prepared by the invention has excellent halogen-free flame retardance, outstanding damp-heat aging resistance and high mechanical strength, and is suitable for the field with strict requirements on safety and durability.

The present application relates to the technical field of gel electrolyte for supercapacitor, in particular to a gel electrolyte based on lysozyme amyloid fibers and application thereof. The ion conductivity of the conventional plant protein-based gel electrolyte is poor, and the electrical performance needs to be further improved. In view of the above problems, the present application provides a gel electrolyte based on lysozyme amyloid fibers. The lysozyme in the formula self-assembles into amyloid fibers under acidic conditions, and the surface of the amyloid fibers is rich in polar groups such as hydroxyl, carboxyl and amino groups, which can effectively promote the dissociation of lithium salt. At the same time, the three-dimensional network structure formed by the self-assembly of the fibers. Glycerol as a small molecule plasticizer inserts between the polymer chains. Lithium perchlorate and other lithium salts can provide high concentration of free lithium ions due to the large anion volume and low dissociation energy. The above components synergize and jointly act, effectively improving the comprehensive electrical performance of the gel electrolyte.

This application relates to the field of engineered wood panel manufacturing technology, and discloses a flexible, shapeable technological board and its preparation method. The technological board comprises two layers of reconstituted decorative veneers and a modified polyolefin adhesive film layer located between them. The adhesive film layer is made of metallocene propylene-based elastomer, polyolefin elastomer, maleic anhydride-grafted polyolefin initiator, crosslinking aid, and silane coupling agent. The preparation method includes: coating the surface of resin particles with liquid-phase additives, and obtaining an adhesive film with latent reactive activity through low-temperature extrusion casting; stacking the veneers and adhesive film layers, initiating crosslinking reaction and interfacial bonding through high-temperature hot pressing, and then holding the pressure and cooling for shaping. This invention solves the problems of high formaldehyde content and brittleness of traditional adhesives and poor heat resistance of ordinary thermoplastic films. The resulting board has excellent flexibility, heat creep resistance, and water-resistant bonding strength, meeting the requirements for irregular curved surface shaping.