2929 results about "Impact resistance" patented technology

The invention provides a force and acceleration composite sensor with a calibration function and a working method, and belongs to the field of composite sensors, the force and acceleration composite sensor with the calibration function comprises a test base, the test base is provided with a test through hole, and the test through hole is provided with a mounting hole; a pressure sensitive diaphragm II and a pressure monitoring core body are mounted in the mounting hole; an impact head limiting and fixing upper base is mounted on the test base, an impact head is mounted in a sliding through hole of the impact head limiting and fixing upper base, a first pressure sensitive diaphragm is arranged at the lower end of the impact head, and an acceleration monitoring core body is mounted at the lower end of the first pressure sensitive diaphragm; a third pressure sensitive diaphragm is installed at the bottom of the test through hole, a calibration base is arranged at the lower end of the test base, a calibration groove is formed in the calibration base, and a standard pressure sensor and a tested pressure sensor can be installed on the side wall of the calibration groove. The device has the beneficial effects that the device has multiple advantages of synchronous monitoring of force and acceleration, flexible impact resistance and integrated calibration.

The invention belongs to the technical field of architectural ceramics, and particularly relates to a tempered high-strength impact-resistant ceramic sheet and a preparation method thereof. The toughened high-strength impact-resistant ceramic thin plate comprises a ceramic thin plate blank and a toughened coating which is arranged on the surface of the ceramic thin plate blank and is obtained by firing toughened coating slurry. A ceramic sheet reinforcing process is developed by referring to a stress structure of tempered glass, and the impact resistance and the bending strength of the material are remarkably improved by establishing the pressure stress layer on the bottom surface of the green body and cooperating with the pressure stress layer of the glaze layer, so that the application field of the ceramic sheet is widened.

The invention discloses steel fiber reinforced metakaolin-based recycled concrete and a preparation method thereof, and belongs to the technical field of civil engineering materials. The concrete is prepared from the following components in percentage by mass: 60wt%-80wt% of recycled aggregate, 20wt%-40wt% of a cementing material, 0.5 wt%-1.4 wt% of steel fibers and 0.1 wt%-0.7 wt% of an additive, wherein the cementing material comprises cement and metakaolin, and the mass ratio of the metakaolin to the cement is (1-3): (7-9). A nano silicon dioxide coating is arranged on the surface of the steel fiber. The preparation method adopts a step-by-step stirring process. The problem that dynamic impact resistance and green low carbon are difficult to cooperate in the prior art is solved, through component optimization and process control, the dynamic compressive strength of the concrete is improved, the energy absorption capacity is improved, the damage mode is converted into ductility from brittleness, fiber distribution is uniform, and the concrete is suitable for impact-resistant projects such as airport runways and protective structures.

The invention discloses a novel permanent magnetic mechanism suitable for a permanent magnetic circuit breaker and a ring main unit, which is characterized in that a static iron core and a movable iron core are oppositely arranged in an aluminum alloy shell along the axial direction, an internal pull rod penetrates through the axis of the aluminum alloy shell, and the internal pull rod movably penetrates through the static iron core and is connected with the movable iron core; a shaft fixing ring is movably arranged on an inner pull rod of the aluminum alloy shell, the shaft fixing ring movably abuts against the side, away from the static iron core, of the movable iron core, and the two sides of the shaft fixing ring are axially limited through a locking nut and a total stroke adjusting nut which are connected to the inner pull rod in a threaded mode. The mechanism is provided with a total stroke adjusting mechanism, an overtravel adjusting mechanism and a switching-on and switching-off speed adjusting mechanism, respective adjustment is achieved through special nuts, the problem of synchronous change of the opening distance and the overtravel of a traditional mechanism is solved, an aluminum alloy shell and a closed magnetic circuit are adopted, magnetic leakage is reduced, the magnetic field utilization rate and the impact resistance are improved, and spring pre-tightening force is changed through spring adjusting nuts; the switch-on and switch-off speed is accurately controlled, various loads are adapted, and the breaking risk is reduced.

The invention relates to the technical field of cables, and discloses a high-voltage cable with high safety performance. The cable comprises a conductor, a conductor shielding layer, an insulating layer, an insulating shielding layer, an inner buffer layer, a protective layer, a reinforced steel cable, an outer buffer layer and an outer protective layer which are sequentially and coaxially arranged from inside to outside. The protective layer is composed of a plurality of sets of protective units arranged in an array mode in the axial direction, and each protective unit is of an annular structure defined by a plurality of protective pieces in the circumferential direction. The inner wall and the outer wall of the protection piece are arc-shaped, steel cable grooves are formed in the two sides of the protection piece, and hollow grooves are formed in the protection piece; the multiple protection units are in staggered butt joint to form a continuous spiral surrounding structure. And the reinforcing steel cable is spirally wound and embedded in a spiral channel formed by the steel cable grooves of the protective sheets. Uniform conversion and dispersion from axial tension to radial stress are realized, the design of the rhombic protection sheets and the hollowed-out grooves is combined, the tensile resistance, extrusion resistance, impact resistance and cutting resistance of the cable are remarkably improved, and the cable is suitable for a complex laying environment.

The invention discloses a full-spectrum protective anti-fingerprint resin lens and a preparation method thereof. The full-spectrum protective anti-fingerprint resin lens comprises a functionalized resin base material and a gradient composite functional coating. The base material takes polyurethane acrylate as a matrix, and nano cerium oxide, nano barium titanate and nano tungsten oxide functional particles are uniformly dispersed through in-situ polymerization, so that base material intrinsic protection on ultraviolet rays, harmful blue light and near-infrared light is realized. The gradient coating comprises an adhesion promoting layer, a full-spectrum repairing and protecting layer and an anti-fingerprint layer from inside to outside, a stable composite system is formed through chemical bonding, protection is further reinforced, and the lens is endowed with super-hydrophobic and oleophobic anti-fingerprint characteristics. Through the integrated design of base material modification and coating compounding, the technical problems that an existing lens is single in protection wave band, not lasting in performance and prone to being stained with fingerprints are solved, and meanwhile the lens has high light transmittance, low reflection, excellent wear resistance and impact resistance and excellent comprehensive performance.

The automatic injector comprises an injection assembly, the injection assembly comprises a sound production base, and the periphery of the sound production base is movably sleeved with a sound production part and a release part; a limiting block and a boss located on one side of the limiting block are arranged on the periphery of the sound production base, a boss slope is arranged on the side, facing the limiting block, of the boss, a limiting groove is formed between the boss slope and the limiting block, and the release piece is provided with a first protrusion capable of being clamped in the limiting groove. The first protrusion is provided with a first end face matched with the inclined face of the boss, a second end face matched with the limiting groove and a third end face matched with the limiting block. The automatic injector is reliable and practical, false triggering of the automatic injector can be effectively prevented under the accidental conditions such as falling, the impact resistance and the stability of a product structure after injection are remarkably improved, the problem of limiting failure caused by accidental stress is avoided, early sound production caused by early displacement of a push rod linkage piece can be effectively prevented, and the service life of the automatic injector is prolonged. And the stability of the sounding function of the automatic injector after injection is improved.

The invention discloses a cable with a co-extrusion self-foaming ceramic fireproof layer and a preparation method of the cable, and belongs to the technical field of polyolefin cables. The cable comprises a conductor, an insulating layer and a fireproof layer from inside to outside, comprising the following raw materials: 40-60 parts of an ethylene-vinyl acetate copolymer, 20-40 parts of a polyolefin elastomer, 20-30 parts of a ceramic precursor filler, 5-10 parts of a compatilizer, 5-10 parts of a cosolvent, 3-5 parts of a flexibilizer, 2-4 parts of a main foaming agent, 1-2 parts of an auxiliary foaming agent, 1-3 parts of a lubricant and 0.5-1.5 parts of an antioxidant. The compatilizer is siloxane containing sulfydryl and phosphaphenanthrene groups, and the flexibilizer is silane coupling agent modified quartz fibers containing double bonds. In a matrix of the ethylene-vinyl acetate copolymer and the polyolefin elastomer, the compatilizer and the flexibilizer are added, so that the fireproof layer is endowed with better impact resistance and flame retardance.

The invention discloses a polypropylene corrugated pipe composite material and a preparation method of a composite polypropylene corrugated pipe, and the polypropylene corrugated pipe composite material is prepared from the following raw materials in parts by weight: 90-100 parts of polypropylene, 15-20 parts of modified talcum powder, 2-3 parts of a compatilizer, 0.5-1 part of a lubricant and 0.5-0.8 part of an antioxidant. According to the polypropylene corrugated pipe composite material disclosed by the invention, rigid pyromellitic dianhydride and flexible castor oil are sequentially grafted on the surface of talcum powder, so that the obtained modified talcum powder has multiple functions of interface compatibility, heterogeneous nucleation, rigidity enhancement, flexible toughening and the like, and then the modified talcum powder is added into a polypropylene matrix as a functional filler; the polypropylene corrugated pipe composite material has the advantages of high ring stiffness, excellent toughness and impact resistance, simple formula and clear process route, and the prepared corrugated pipe has excellent comprehensive performance and high industrial application value.

The present invention addresses the problem of providing a hollow molded article that can be suitably applied to propeller blades for UAMs and drones, is lightweight, and has exceptional impact resistance. In order to solve the aforementioned problem, a hollow molded article comprises: a skin part (skin part (A)) composed of a composite material that contains a resin and reinforcing fibers, the skin part forming the outer surface of the hollow molded article; and a hollow part and a porous body in the internal space of the skin part (A), the hollow molded article being characterized in that, in regard to three planes (plane a, plane b, and plane c, in order from the plane with the greatest area) forming a rectangular parallelepiped that circumscribes the hollow molded article and has the smallest volume, the ratio (α / β) is 1.5-150, where α (cm) is the length of the long side of the plane a and β (cm) is the arithmetic average value of the lengths of the long and short sides of the plane c, and in that conditions 1 and 2 are satisfied.　Condition 1: The porous body has a specific gravity of 0.3 or lower, and at least one porous body is in contact with all or part of the inner surface of the skin part (A) forming a ridge line from either or both of a point and a surface in contact with the plane b to the plane c in top view seen from the plane a.　Condition 2: In all cross-sections perpendicular to the longitudinal direction at positions where the hollow molded article is equally divided into four sections in the longitudinal direction, the area occupied by the hollow part is 50-95%, where 100% is the sum of the area occupied by the hollow part and the area occupied by the porous body.

The invention discloses a jacquard vamp material based on bio-based degradable polylactic acid (PLA) and a preparation method thereof, and relates to the technical field of shoe materials. The jacquard vamp material is of a three-layer jacquard structure formed by integrally weaving PLA composite filaments through a jacquard warp knitting machine. The PLA composite filament is prepared from the following raw materials in parts by weight: 80-95 parts of polylactic acid (PLA) slices, 5-15 parts of poly (butylene adipate / terephthalate) (PBAT), 3-8 parts of a flexibilizer, 1-3 parts of a compatilizer, 0.5-2 parts of an anti-hydrolysis agent and 0.5-1.5 parts of a lubricant. According to the invention, the bio-based PLA is used as a main raw material and is matched with degradable auxiliaries such as PBAT, so that the whole vamp material can be completely biodegraded under a composting condition, the problem of environmental pollution of a traditional vamp is fundamentally solved, and meanwhile, through blending modification of PBAT and the flexibilizer, the flexibility and impact resistance of the PLA material are remarkably improved, and the vamp material has good application prospects. The requirements of the vamp material on softness, wear resistance and durability can be met.

The invention relates to a high-solid-content epoxy glass flake heavy anti-corrosion coating for an offshore wind power foundation, which consists of a component A and a component B, the component A is prepared from raw materials in percentage by weight as follows: 10%-20% of bisphenol A epoxy resin, 20%-40% of modified hydrogenated epoxy resin, 5%-10% of liquid petroleum resin, 1%-2% of a rheological aid, 0.1%-1% of a dispersant, 0.1%-1% of a defoaming agent, 1%-3% of a silane coupling agent, 5%-10% of modified glass flakes, 20%-40% of functional filler and 0-10% of a composite environment-friendly solvent; and the component B is a mixed amine epoxy curing agent. The epoxy glass flake coating disclosed by the invention can be thickly coated at one time, has excellent adhesive force, hardness, wear resistance and impact resistance, is high in drying speed, excellent in chemical corrosion resistance, seawater soaking resistance and cathodic disbonding resistance, and meets the performance requirements of NORSOK M-501: 2022 (edition VII) Surface Treatment and Protective Coating.

The invention discloses a forming mold and a preparation method of a surface reinforced thermoplastic composite material, and belongs to the field of high-performance thermoplastic composite material manufacturing, the forming mold comprises an upper mold, a lower mold and a frame; a plane boss is arranged at the bottom of the upper die, a reinforcing rib boss is detachably arranged at the bottom of the plane boss, and transverse lugs used for being locked by a locking mechanism are arranged on the two sides of the plane boss and the reinforcing rib boss respectively. The upper die and the lower die are matched through a frame, and the side face of the lower die is provided with a temperature detection hole used for containing a thermocouple. The surface reinforced thermoplastic composite material with excellent interface performance, dimensional stability and impact resistance can be prepared, the excellent mechanical property of a continuous fiber reinforced composite material and the manufacturing flexibility of a long fiber reinforced composite material can be integrated, and the surface reinforced thermoplastic composite material has a wide application scene.

The invention relates to the technical field of multi-layer material preparation, in particular to a high-light-transmittance weather-proof impact-resistant striped sound insulation board. The problem that transparency, weather resistance and sound insulation effect of a traditional stripe material are difficult to consider at the same time is solved. The light scattering and absorption center is reduced and high transparency and low haze are realized through reactive extrusion of the recycled material, combination of high-temperature adsorption activated carbon, multi-stage high vacuum and deep purification of a reactive decolorizing agent, and matching of transparent dispersion diffusion master batch and a compatilizer. The surface layer adopts the core-shell weather-resistant master batch and the secondary high-energy UV fluorosilicone curing coating for double shielding of ultraviolet and inhibition of photodegradation and yellowing; styrene-maleic anhydride damping resin is introduced into the middle layer, and uniform inclined micropores and asymmetric stripes formed by supercritical CO2 are combined, so that the medium and low frequency sound insulation index is improved; the bottom layer is repaired and guaranteed to be durable in impact resistance by virtue of a core-shell toughening agent and molecular chain extension; the defects of traditional products are overcome, and the service life requirement of sound barriers for expressways and rail transit is met.

The invention provides a high-strength corrosion-resistant CPVC plate and a preparation method thereof, and belongs to the technical field of high polymer materials, the preparation method comprises the following steps: S1, preparing Si-MBS; s2, mixing CPVC resin powder, Si-MBS, chlorinated polyethylene, a stabilizer, a processing aid, a lubricant and a coupling agent-hollow microsphere, melting, plasticizing, extruding, calendaring to form a plate, and cooling and shaping to obtain a CPVC base material; and S3, spraying the coating slurry containing ZIF-67 / GO-coated BTA / PEI powder on the surface of the CPVC base material, vacuumizing, and curing to obtain the high-strength corrosion-resistant CPVC plate. The overall strength and impact resistance can be improved, and meanwhile the overall corrosion resistance is improved.

The utility model discloses an impact-resistant vortex shedding flowmeter with a tough structure, which relates to the technical field of vortex shedding flowmeters and comprises a vortex shedding flowmeter main body, pipeline impact-resistant components and a lower impact-resistant component, the pipeline impact-resistant components are mounted at two ends of the vortex shedding flowmeter main body, rubber impact-resistant parts are arranged in the pipeline impact-resistant components, and the lower impact-resistant component is mounted in the lower impact-resistant component. The vortex shedding flowmeter comprises a vortex shedding flowmeter body, a lower impact-resistant assembly is installed at the bottom of the vortex shedding flowmeter body, an elastic telescopic piece is arranged in the middle of a rubber impact-resistant piece and comprises a plurality of first rubber elastic rings and second rubber elastic rings, and the size of the first rubber elastic rings is larger than that of the second rubber elastic rings. The vortex shedding flowmeter solves the problems that an existing vortex shedding flowmeter carries out anti-impact operation mainly in the mode that a damping assembly is additionally arranged outside, the structure mainly aims at the influence of surrounding vibration, the effect of weakening vibration transmitted by a pipeline connected with the vortex shedding flowmeter is poor, cost is high, and installation is inconvenient.

The invention belongs to the technical field of insulating materials, and particularly provides an epoxy glass fiber composite insulating material and a preparation method and application thereof. An epoxy glass fiber composite insulating material comprises epoxy resin, modified glass fiber cloth, modified carbon fiber cloth, epoxy POSS (polyhedral oligomeric silsesquioxane), a curing agent and a diluent, and the modified glass fiber cloth is prepared by modifying a composite modification liquid and a silane coupling agent; the modified carbon fiber cloth is prepared by oxidation of mixed acid and modification of composite modification liquid; the composite modified liquid is prepared by compounding a hydrophobic modified lignin solution and modified MOF; the modified lignin solution is prepared from oleic acid and lysine modified lignin; the modified MOF is prepared from MOF modified by polydopamine. The epoxy glass fiber composite insulating material prepared by the invention has good flame retardance, impact resistance, corrosion resistance and self-repairing performance.

The invention provides a BIM-based open bench blasting blast hole fine charging design optimization method, and relates to the technical field of electric digital data processing, and the method comprises the following steps: collecting related characteristic parameters of a blasting project; establishing a blasting wave and range mathematical model, and outputting a blasting wave and coefficient corresponding to the current initial explosive charge; acquiring the upper limit of the shock resistance margin of the explosive, collecting the average distance between adjacent blasting holes, and calculating the blasting coherence index by combining the blasting sweep efficiency; and setting a coherence threshold value, and comparing the blasting coherence index with the set coherence threshold value. According to the method, the blasting interference risk between the adjacent blast holes is quantitatively evaluated by introducing the blasting coherence index, and the problem of explosive load design deviation caused by the fact that a conventional scheme only depends on an empirical formula or static parameters is solved; and a closed-loop feedback optimization algorithm is adopted to automatically adjust the explosive load until a coherence threshold value is met, collaborative operation guarantee of the blasting sequence is realized, and the blasting safety and the resource utilization efficiency are remarkably improved.

The invention relates to the technical field of flame-retardant materials, in particular to flame-retardant polyurea for a masonry surface in a petrochemical industry park and a preparation method of the flame-retardant polyurea. Through mutual cooperation and support of the reaction type phosphorus-containing flame retardant, the additive type modified flame retardant and the environment-friendly intumescent flame retardant, a'reaction type + additive type + intumescent type 'multi-flame-retardant system is constructed, so that the flame-retardant polyurea has good flame retardance and excellent mechanical properties, and is low in price, simple in manufacturing process and suitable for industrial production. The material has the advantages of excellent mechanical properties, impact resistance, flame retardance, high efficiency and environmental protection.

The invention discloses a production method of a high-structural-strength insulating steel tape armored multi-core power cable. The power cable comprises a conductor unit and an insulating layer from inside to outside, wherein the conductor unit is formed by twisting and pressing a conductor with a copper base material, the conductor unit is wrapped outside the conductor, the overlapping rate of the conductor unit is larger than or equal to 50%, and the insulating layer is formed by semi-conductive ceramic silicone rubber and / or crosslinked polyethylene. The double-layer wrapping tape is composed of ceramic silicone rubber filling strips and assists the insulating core wires to be twisted into a cable and is of a filling structure; an inner sheath made of a ceramic silicone rubber material; the composite armor layer is composed of an inner-layer galvanized steel band and an outer-layer stainless steel band; the buffer layer is composed of an aramid fiber woven mesh or a ceramic fiber belt; and the outer sheath is composed of ceramic silicone rubber or a low-smoke halogen-free flame-retardant material of which the oxygen index is greater than or equal to 40. The cable is high in structural strength, good in temperature resistance and high in impact resistance, high-temperature mechanical locking is achieved through tension-controlled double-layer reverse wrapping, and the performance of the cable is greatly improved.

The utility model relates to a bottle cap assembly and a container, the bottle cap assembly comprises an inner plug piece, an inner cap piece, an inner sleeve piece and an outer piece, the inner plug piece is arranged on a first liquid flow opening of the inner sleeve piece, the inner cap piece is plugged on a second liquid flow opening of the inner sleeve piece, the inner sleeve piece comprises a first inner sleeve and a second inner sleeve which are made of different materials, and the outer piece is arranged in the first inner sleeve; the second inner sleeve is arranged on the peripheral face of the first inner sleeve in a surrounding mode, and the outer part is arranged on the inner cover part and the second inner sleeve in a sleeving mode and attached to the peripheral face of the second inner sleeve. According to the bottle cap assembly and the container, the first inner sleeve and the second inner sleeve are made of different materials, so that the first inner sleeve connected with the inner plug piece and the inner cap piece can be made of materials which do not affect contact with liquid, and the safety requirement is met; and the second inner sleeve connected with the outer part can be made of a material which is excellent in temperature resistance and impact resistance and is prohibited from being in contact with liquid, so that the inner sleeve part is not easy to pull out, and the bottle body or the outer part can be damaged when the inner sleeve part is forcibly pulled out, and the aim of preventing counterfeiting is fulfilled.

The application belongs to the technical field of building ceramics, and particularly relates to a tempered high-strength impact-resistant ceramic sheet and a preparation method thereof. The tempered high-strength impact-resistant ceramic sheet comprises a ceramic sheet blank and a tempered coating layer obtained by firing a tempered coating slurry on the surface of the ceramic sheet blank. The ceramic sheet strengthening process is developed by referring to the stress structure of tempered glass. By establishing a compressive stress layer on the bottom surface of the blank, the compressive stress layer of the glaze layer is coordinated, the impact resistance and the bending strength of the material are significantly improved, and the application field of the ceramic sheet is widened.

The invention discloses a flame-retardant impact-resistant MPP electric power tube and a preparation method thereof, belongs to the technical field of MPP electric power tube preparation, and aims to solve the technical problem that the flame retardance, impact resistance and mechanical strength of an MPP electric power tube in the prior art are further improved. The composite material specifically comprises the following components in parts by weight: 60-65 parts of modified polypropylene, 20-25 parts of a flame retardant, 3-5 parts of silicon dioxide coated aluminum oxide, 4-6 parts of modified nano calcium carbonate and 2-3 parts of an auxiliary additive. According to the flame-retardant and impact-resistant MPP electric power tube, the flame-retardant property, the impact resistance and the mechanical strength of the prepared flame-retardant and impact-resistant MPP electric power tube are further improved through the modified polypropylene, the flame retardant, the silicon dioxide coated aluminum oxide and the modified nano calcium carbonate.

The application provides a polyamide composition and application thereof, the polyamide composition comprises the following components in parts by mass: polyamide 40-99.5 parts, reinforcing material 10-45 parts, and flame retardant 5-35 parts; the flame retardant comprises the following components in parts by mass: diethyl phosphinate 30-90 parts, ethyl phosphinate 0.01-3 parts, dihydrocarbyl phosphite 5-67 parts, and hydrocarbyl phosphite 0.01-5.5 parts. The application can play the effect of efficient flame retardation by introducing specific flame retardants, so that the polyamide composition has excellent flame retardation and excellent impact resistance.

The invention discloses a wear-resistant and corrosion-resistant modified polyethylene special pipe and a preparation method thereof, and relates to the technical field of high polymer materials. The high-density polyethylene composite material is prepared from the following raw materials in parts by mass: 360 to 440 parts of high-density polyethylene, 100 to 120 parts of an ethylene-1-octylene copolymer, 15 to 20 parts of modified nanotubes, 20 to 25 parts of a composite flame retardant, 8 to 10 parts of a cold-resistant toughening agent, 0.2 to 0.4 part of an antioxidant 1010 and 0.2 to 0.4 part of an antioxidant 168. The modified nanotube is prepared by the following steps: pretreating a multi-walled carbon nanotube with a nitric acid aqueous solution, compounding the pretreated multi-walled carbon nanotube with tetrabutyl titanate and aluminum nitrate nonahydrate, heating to 800 DEG C in a nitrogen atmosphere, treating the multi-walled carbon nanotube with a mixed gas of methane, nitrogen and ammonia gas for 2-3 hours at 800 DEG C, and finally cooling the multi-walled carbon nanotube in the nitrogen atmosphere. And due to the introduction of the composite flame retardant and the like, the impact resistance, wear resistance, flame retardance and corrosion resistance of the polyethylene pipe are effectively improved.

The invention discloses a polyamide cable material as well as a preparation method and application thereof. The cable material is prepared from the following raw materials in parts by weight: 100 parts of polyamide, 10 to 40 parts of nano magnesium hydroxide whisker, 1 to 5 parts of silane coupling agent, 1 to 5 parts of amphiphilic block copolymer, 1 to 10 parts of pentaerythritol triacrylate and 1 to 5 parts of antioxidant, wherein the fiber length of the nano magnesium hydroxide whisker is 200 to 1000 nm, and the fiber diameter of the nano magnesium hydroxide whisker is 30 to 80 nm. The polyamide cable material has good temperature resistance (can tolerate the high temperature of 135 DEG C for a long time), flame retardance (the limit oxygen index can reach 31% or above, preferably 33.5%), mechanical properties (excellent tensile strength and low-temperature impact resistance) and relatively high volume resistivity.

The invention discloses an artificial biological reef for naturally repairing coral, a system and a preparation method. The artificial biological reef body comprises a main body structure made of a cement-based composite material, and at least one hollow cavity is formed in the main body structure; the ecological through holes penetrate through the wall thickness of the main body structure and are used for promoting water flow exchange and marine organism channels; the biological affinity surface layer is arranged on the surface of the main body structure, is made of cement-based materials mixed with seaweed extracts and has rough textures so as to promote attachment of coral larvae; and a reinforcing framework formed by a corrosion-resistant fiber reinforced material embedded in the main body structure improves the overall structural strength and impact resistance. The system comprises a plurality of reefs, special connecting pieces and a foundation stabilizing platform, and can be combined into an array for simulating a natural reef space structure. The preparation method comprises the steps of seaweed extract preparation, bioactive slurry preparation, assembly prefabrication, integrated pouring forming, maintenance and function integration, and preparation of the eco-friendly, stable-structure and multifunctional artificial reef is achieved.

The invention relates to the technical field of coatings, and discloses a heat-insulating powder coating as well as a preparation method and application thereof. The heat insulation powder coating is prepared from the following preparation raw materials in parts by mass: 160 to 220 parts of organic silicon modified polyester resin, 10 to 30 parts of modified hollow glass beads, 30 to 70 parts of modified sericite powder, 40 to 60 parts of titanium dioxide, 3 to 5 parts of hydrophobic SiO2 aerogel and 10 to 20 parts of curing agent, wherein the organic silicon modified polyester resin is prepared by melting and blending weather-proof polyester resin and organic silicon resin according to the mass ratio of (4-9): 1; the temperature of melt blending is 90 to 130 DEG C. According to the coating, the excellent heat insulation performance that the solar reflectance is larger than or equal to 0.87 and the heat conductivity coefficient is smaller than or equal to 0.075 W / m.K is achieved, the excellent mechanical strength, adhesive force, impact resistance and long-acting weather resistance are achieved, and heat loads on the surfaces of building outer walls, industrial furnace shells, household appliances and the like can be remarkably reduced.

The invention discloses a waterproof and pressure-resistant acceleration impact sensor, and relates to the technical field of impact detection, the waterproof and pressure-resistant acceleration impact sensor comprises a base, the bottom of the base is provided with a mounting screw groove, the top of the base is fixedly provided with a supporting stud, the outer ring of the supporting stud is sleeved with an inner protective shell in a threaded manner, and the inner protective shell is internally provided with a sensitive element. The device comprises an inner protective shell, the outer side of the inner protective shell is wrapped with an outer protective shell in a protective mode, a buffer reset mechanism is installed at the top of the outer protective shell, and an outer ring damping mechanism is installed in the buffer reset mechanism. The waterproof sealing performance, the impact resistance and pressure resistance and the signal transmission stability are remarkably improved, the problems that a traditional sensor is prone to leakage, signal distortion and connection looseness in extreme environments such as underwater explosion are effectively solved, and the sensor is suitable for complex application scenes such as wide temperature and high-frequency impact.

The invention discloses a method for preparing a high-impact-resistance cosmetic bottle material through PET regeneration, belongs to the technical field of PET regeneration and utilization, and aims at solving the technical problem that in the prior art, when PET is regenerated for preparing an impact-resistance cosmetic material, the mechanical property and the transparency of the material need to be further improved. Comprising the following steps: crushing waste PET into PET powder with the particle size of 2-5mm, and then performing alcoholysis regeneration on the PET powder to obtain BHET. According to the invention, the waste PET is taken as a raw material, the regenerated PET with reaction activity is obtained through depolymerization, amination and repolymerization, and the regenerated PET is reinforced through the polyurethane elastomer and the activated silicon dioxide, so that the bending stress and the impact resistance of the cosmetic bottle material are effectively improved, and the transparency of the cosmetic bottle material is also improved; the high-valued application of the waste PET regenerated material in the field of high-end cosmetic packaging is realized.