407 results about "Liquid layer" patented technology

Disclosed are a standing wave acoustofluidic device for sorting exosomes in body fluids and a method for using same. The standing wave acoustofluidic device for sorting exosomes in body fluids comprises an upper microfluidic chip and a lower acoustic wave excitation apparatus. The microfluidic chip comprises a channel chip and a cover plate, and the acoustic wave excitation apparatus comprises a piezoelectric transducer and an acoustic wave coupling liquid layer. The piezoelectric transducer is reversibly connected to the cover plate by means of the acoustic wave coupling liquid layer. The piezoelectric transducer is a piezoelectric ceramic. The channel chip is provided with a body fluid sorting channel, and the cover plate is provided with a micro-channel groove array structure corresponding to the body fluid sorting channel. The micro-channel groove array structure adjusts acoustic waves excited by the piezoelectric transducer, such that the acoustic waves are modulated in a space composed of the channel chip and the cover plate to form a required standing wave acoustic field. The present invention has advantages such as not affecting cell activity, being unaffected by temperature and the like, offering a stable sorting process, a simple manufacturing process, and low regulation difficulty, and eliminating the need to match the width, depth, and the like of microfluidic channels with the half-wavelength of acoustic waves.

The embodiment of the invention relates to the technical field of glass fiber mobile phone rear covers, and provides a glass fiber mobile phone rear cover and a manufacturing method thereof, and the method comprises the steps: 1, providing a base material which is a PET film; step 2, forming a release texture layer on the base material by using UV release glue; step 3, coating a dual-curing hardening liquid on the release texture layer, and carrying out baking and pre-curing treatment to form a hardening liquid layer; 4, forming a transfer printing inner texture layer on the hardening liquid layer by using UV transfer printing glue through a roll-to-roll transfer printing process; step 5, depositing a dielectric film layer of 30-300nm on the inner texture layer through magnetron sputtering; step 6, carrying out silk-screen processing on the dielectric film layer to form a silk-screen layer, and obtaining an initial thin film; and step 7, carrying out curing and mold pressing treatment on the prepared initial thin film to prepare the glass fiber mobile phone rear cover, so that the yield of the glass fiber mobile phone rear cover can be improved.

The invention provides an ultrathin liquid metal thermal interface material based on dynamic infiltration regulation and a preparation method, the ultrathin liquid metal thermal interface material is composed of a high-purity liquid metal main body and liquid metal dynamic infiltration adhesion layers connected to the two sides of the high-purity liquid metal main body, the material of the liquid metal dynamic infiltration adhesion layer is the same as that of the high-purity liquid metal main body, and the liquid metal dynamic infiltration adhesion layer is spread on the surface of the heating substrate and the surface of the heat dissipation substrate respectively. According to the method, the ultrathin metal liquid layer formed through dynamic infiltration is directly used as a heat transfer medium, molecular-level seamless attachment between the liquid metal and the substrate material interface is achieved, the ultrathin thermal interface with the minimum thickness of only nanoscale 1-1000 nm can be obtained, the contact thermal resistance is greatly reduced, the actually measured interface thermal conductivity can reach 25.9-47.1 W / m <-1 >. K <-1 >, and the thermal conductivity of the interface is greatly improved. The measured value far exceeds the measured value of the current commercial thermal interface material; the dynamic infiltration regulation and control means provided by the invention has universality and can be widely applied to various different heating and heat dissipation substrate materials.

The invention discloses a neutralization liquid layering tank and layering process for sucralose production, and particularly relates to the technical field of layering tanks, the neutralization liquid layering tank mainly comprises a layering tank, a stirring rod and a sliding groove column, the stirring rod is located in the layering tank, the sliding groove column is fixed to the top end of the stirring rod, and the outer wall of the sliding groove column is rotationally connected with the layering tank; a linkage transverse blocking mechanism is arranged on the inner wall of the sliding groove column; the linkage transverse blocking mechanism comprises a rotating ring arranged on the inner wall of the sliding groove column in a sliding mode. A linkage transverse blocking mechanism is adopted, the bottom end of a sleeve rod drives a push shaft to move horizontally, a sliding strip and an inclined rod synchronously drive a spacing sealing plate to move rightwards, the spacing sealing plate drives a rubber pressing strip to move rightwards, and the spacing sealing plate and a stirring strip can block and buffer neutralizing liquid flowing in the layering tank in sucralose production; a neutralization solution in sucralose production is quickly stood, so that quick layering operation is realized, and the layering efficiency is greatly improved.

The present invention relates to a method of manufacturing a surface-modified material wherein the method comprises the steps of applying a coating composition onto at least one surface of a substrate to form a porous coating thereon wherein the coating composition comprises mineral particles selected from the group consisting of calcium carbonate, calcium phosphate, hydromagnesite and mixtures thereof and a binder, and impregnating the porous coating with at least 150% by weight of an impregnating liquid composition based on the total weight of the porous coating to form a constraining liquid layer within and on the porous coating wherein the impregnating liquid composition is chemically inert to the substrate and the porous coating. Furthermore, the invention relates to a corresponding surface-modified material, an article comprising the same and the use of such a material.

The invention provides an underground water sampling device with a protective structure, and relates to the technical field of underground water sampling, the underground water sampling device comprises a sampling bottle, the bottom of the sampling bottle is sleeved with a protective sleeve; a mounting cover is arranged at the top end of the sampling bottle; a sealing plug is arranged at the position, close to the top end, in the sampling bottle, two hooks are adjusted in the opposite directions to relieve hooking of a limiting clamping block, the sealing plug is driven to slide downwards along a limiting frame through the rebound pulling effect of a first extension spring, and underground water can enter the sampling bottle through a gap between a water inlet and the limiting frame; opening can be controlled according to the underground water collection position, accurate collection of different liquid layers is achieved, the accuracy of sample detection is guaranteed, and the problems that in the process of sampling different water levels, a sampling bottle needs to be controlled to be adjusted to be opened and closed, operation is troublesome, and time and labor are wasted are solved. And unsteady opening and closing control is easy to cause mixing of groundwater at different depths, so that the accuracy of groundwater analysis and detection is influenced.

The robot simulation skin structure comprises a temperature control unit and an evaporation heat dissipation unit, the temperature control unit comprises a flexible base layer and a silver electrode layer, the silver electrode layer covers the flexible base layer, the flexible base layer is made of a flexible PTC material, the evaporation heat dissipation unit comprises a liquid storage layer and an opening and closing door, and the opening and closing door is made of a flexible PTC material. The opening and closing door covers the liquid storage layer, the opening and closing door is a shape memory alloy opening and closing door or a shape memory polymer opening and closing door, and heat dissipation liquid is arranged in the liquid storage layer. Therefore, according to the simulated skin structure, the temperature sensing function, the self-adaptive heating function and the evaporative heat dissipation function are integrated into a single flexible structure, the autonomous response of local heat management can be achieved without an external complex control system, and therefore an extra sensor, an extra controller and an extra complex circuit are omitted; independent work and quick response of each local area are realized, and the system structure is greatly simplified.

The invention belongs to the technical field of pressure analysis, and discloses a pressure analysis method for an external liquid storage structure under the action of an explosive shock wave load, which comprises the following steps: analyzing the dynamic response process of the external liquid storage structure under the action of the explosive shock wave load according to the dynamic response process of a non-liquid-storage structure, and theoretically calculating and solving the dynamic response process of the external liquid storage structure. The displacement and deformation theoretical solution of the external liquid storage structure is obtained, and the calculation time is greatly shortened. The method comprises the following steps: establishing a structural dynamic response theoretical model of an external liquid storage structure under the action of explosive shock wave load, taking a liquid storage container and a liquid medium as the additional mass mw of the structure, determining a structural dynamic response process according to the thickness of a liquid layer and considering the restrictive action time of the liquid medium on structural deformation, and calculating the structural dynamic response by solving a structural displacement solution. The deformation condition of the external liquid storage structure under the action of the explosive shock wave load is obtained, the solving efficiency is greatly improved, and the defects that finite element simulation solving is low in efficiency and long in consumed time are overcome.

A display panel and a manufacturing method therefor, and a display device. A display panel (20) comprises: a substrate (21), a light-transmitting substrate (22), an electrophoretic liquid layer (23), a plurality of light converging and reflecting structures (24), and a plurality of corresponding scattering structures (25). The light converging and reflecting structures (24) reflect and converge light incident into the display panel (20), and direct the reflected light to the corresponding scattering structures (25), such that the reflected light passes through the scattering structures (25) and emerges from the display panel (20); and the scattering structures (25) can expand the irradiation area of the emergent light and improve the visual uniformity of the emergent light, thereby improving the display effect of the display panel (20). Moreover, the area of the orthographic projections of the scattering structures (25) on the substrate (21) is smaller than the area of the orthographic projections of the light converging and reflecting structures (24) on the substrate (21), such that at least part of the light incident to the light converging and reflecting structures (24) does not need to pass through the scattering structures (25), thereby reducing the loss of light, improving the reflection efficiency of the display panel (20), and improving the display effect of the display panel (20).

The utility model discloses a gluing roller structure of a wood sheet, a central shaft rod is coaxially fixed on a roller in a penetrating manner, the circumferential side wall of the roller is coaxially coated with an annular rubber pipe, the surface of the circumferential side wall of the annular rubber pipe is coaxially provided with a plurality of annular bulges, and the annular bulges are distributed along the circumferential direction of the annular rubber pipe at equal intervals; the height of the annular protrusions relative to the outer side wall of the annular rubber pipe ranges from 1 mm to 2 mm, and the axial groove width of an annular rubber reserving groove formed between every two adjacent annular protrusions ranges from 2 mm to 5 mm. According to the gluing roller structure of the wood sheet, through the effect of the annular protrusions, the outer side wall of the annular glue pipe can effectively gather glue liquid, a glue liquid layer is formed on the surface of the circumferential side wall of the annular glue pipe, it is guaranteed that when the gluing roller makes contact with the sheet material for gluing, enough glue liquid is applied to the sheet material, and the gluing quality is improved. The gluing effect is guaranteed, and the surface of the wood sheet can be prevented from being crushed by the roller through the arrangement of the annular glue pipe.

A sample analysis system (10), comprising a sample storage apparatus (100), a sample measurement apparatus (200), a sample container transfer apparatus (300), a first photographic apparatus (400) and a control apparatus (500). The control apparatus (500) is configured to obtain a first target image on the basis of an image captured by means of the first photographic apparatus (400) executing a first photographing action, and to output at least one of the following pieces of information: the first target image, a determination result for indicating whether there are clots in an intermediate layer liquid (32), and a determination result for indicating the degree of coagulation in a blood sample (30), wherein the first target image at least includes an image showing an interface liquid surface (321) or an interface liquid layer in a two-dimensional form and / or a three-dimensional form for use as a basis for determining whether there are clots in the intermediate layer liquid (32) and / or as a basis for determining the degree of coagulation in the blood sample (30). The probability of missed detection of early coagulation in the blood sample (30) is reduced, and the accuracy of determining whether clots have formed in the blood sample (30) before aspiration is improved.

The invention relates to the technical field of wafer jacking, in particular to a wafer chip jacking structure which comprises a base, a jacking pipe is fixed to the top face of the base, a jacking table is vertically and slidably connected into the jacking pipe, an electric cylinder is fixed between the bottom of the jacking table and the base, the wafer chip jacking structure further comprises multiple ejector pins, and each ejector pin comprises a U-shaped part and a vertical part; the vertical part is fixed to one end of the U-shaped part, the U-shaped part is rotationally connected to the ejecting table, a motor is fixed to the ejecting table, and the motor is fixedly connected with a rotating shaft of the U-shaped part. According to the blue film ejecting device, the balls are arranged at the ends of the ejector pins and make rolling contact with a blue film, blue film vibration caused by sliding friction is reduced, and a liquid storage groove is formed in each ejector pin; and the balls are filled with the lubricating liquid, so that a lubricating liquid layer is formed between the balls and the blue film, the vibration of the blue film caused by the friction effect can be further reduced, and the stability of the wafer chip can be ensured when the position of the wafer chip is adjusted.

The invention provides an adhesive tape, a preparation method of the adhesive tape, an electrochemical device and electric equipment. The adhesive tape comprises a bonding layer and a liquid absorption layer. And a plurality of through holes are formed in the bonding layer. The liquid absorbing layer is arranged on one side of the bonding layer, and the liquid absorbing layer is provided with a pore structure. And one side, deviating from the liquid absorption layer, of the bonding layer is used for bonding a corner region of a pole piece in the electrode assembly. The adhesive tape can protect the corner area of the pole piece, and the risks of pole piece breakage and material falling caused by large inner ring pressure in the hot pressing process are reduced. The multiple through holes in the bonding layer and the pore structure of the liquid absorption layer can provide channels for ion movement, the risk that active substances on the pole piece in the corner area lose activity is reduced, the liquid absorption layer can also absorb and store a certain amount of electrolyte, the electrolyte is provided for later circulation, the dynamic performance of the battery is guaranteed, and the phenomena of lithium precipitation and black spots at the corner are improved.

The utility model discloses a manganese lithium solution extraction device, which relates to the technical field of waste battery recovery and comprises an extraction tank, a plurality of joints are rotatably arranged on the side wall of the extraction tank along the height direction, one end of each joint facing the extraction tank is fixedly communicated with a bent pipe, and the end part of each bent pipe far away from the corresponding joint is positioned in the extraction tank. An observation window is arranged on the outer wall of the extraction tank; and the joint is a self-closing quick joint. By means of the device, when liquid of a needed layer is taken out, a pipeline is connected to the connector, the elbow is driven to rotate by rotating the connector, the end, away from the connector, of the elbow is made to be close to the inner bottom of the corresponding liquid layer, then the liquid of the layer can be discharged, and the problem that the outer wall of the extraction device makes contact with the liquid of different layers is solved; therefore, mixed pollution is avoided, and the extracted solution is ensured to have high purity. And the liquid is discharged without depending on a power source, and the required liquid layer can be discharged by virtue of the gravity and water pressure of the liquid in the extraction tank, so that more energy is saved.

The invention belongs to the technical field of metal processing technologies, and particularly relates to a gradient heat treatment steel strengthening and toughening technology optimization method which comprises the steps that a cooling tank is arranged, a vertical channel is formed in the inner side face of the cooling tank and communicates with a liquid layer in the cooling tank and the outer portion of the cooling tank, and quenching liquid is added into the cooling tank till the vertical channel is submerged; a proper amount of quenching oil is added, so that the quenching liquid and the quenching oil are layered, and a lower liquid layer and an upper oil layer are formed respectively; gradient heating is conducted on a target area of the workpiece in a local heating mode, and austenitizing is achieved; after the workpiece is austenitized, subarea gradient cooling is conducted, the workpiece is put into a cooling tank, quenching oil wraps the workpiece through an oil layer and continues to penetrate into a liquid layer, the surface layer of the workpiece reaches the martensite transformation termination temperature, and austenite is transformed into a martensite structure; the influence of a steam film generated when quenching liquid is used for quenching on the machining stability and the machining quality of a workpiece can be reduced.

The invention provides an electronic component phase change cooling device. The electronic component phase change cooling device comprises a heat dissipation body and a liquid supply assembly. The liquid supply assembly comprises a liquid inlet pipe, two liquid outlet pipes and a cooling part used for cooling the liquid inlet pipe, one ends of the liquid outlet pipes and the liquid inlet pipe are mutually connected, and the other ends of the liquid outlet pipes and the liquid inlet pipe are connected with the heat dissipation body through a second liquid inlet hole and a second liquid outlet hole respectively; the heat dissipation main body comprises a liquid separation layer, a liquid collection layer and a heat dissipation layer; a main distribution flow channel and uniformly distributed first liquid inlet holes are formed in the liquid separation layer; the main distribution flow channel is connected with the first liquid inlet holes through a multi-stage distribution flow channel group; the liquid collecting layer is provided with two symmetrical main collecting flow channels and uniformly distributed first liquid outlet holes, and the main collecting flow channels are respectively connected with the first liquid outlet holes through a multi-stage collecting flow channel group; the heat dissipation layer is provided with evenly-distributed micro-channels, the first liquid inlet holes are communicated with the two ends of the micro-channels, and the first liquid outlet holes are communicated with the middles of the micro-channels. The electronic component phase change cooling device solves the problem that an electronic component phase change cooling device which is high in universality and good in heat dissipation uniformity is lacked in the prior art.

This plasma processing apparatus includes: a processing container configured to be capable of decompression; a support part provided in the processing container and configured to support a workpiece; a heat-transfer-layer-forming part configured to form a deformable heat transfer layer for the workpiece, the heat transfer layer made from at least one of a liquid layer and a solid layer, on a placement surface of the support part on which the workpiece is placed; an exhaust line configured to perform exhaust from a processing space in the processing container; and a bypass line for bypassing the exhaust line. The bypass line is provided with a trap configured to collect the gaseous heat transfer layer included in the exhaust from the processing space.

The invention provides a liquid preparation system based on a multifunctional pilot platform and a liquid preparation chromatography system thereof. The liquid preparation system comprises a first input main pipeline and a second input main pipeline which are respectively connected with a plurality of input pipelines; the outlet end of each input pipeline is connected with a liquid inlet port of the corresponding movable installation module, and each movable installation module is further provided with a plurality of liquid outlet ports. Each liquid outlet port is connected with a plurality of collecting pipelines through an output pipeline; the first input main pipeline is respectively connected with the two collecting pipelines through valves; the second input main pipeline is respectively connected with the plurality of collecting pipelines through valves; the second input main pipeline is connected with the first input main pipeline through a valve; the first input module is connected with an external pump module through a valve; a plurality of chromatographic columns are mounted in an inner shell of the movable mounting module; the device has the advantages that ternary liquid preparation and quaternary online dilution liquid preparation can be realized through a single pump and double pumps, and online liquid preparation chromatography is realized.

The invention relates to a hygienic product with a flow guide structure and production equipment and process thereof. The hygienic product comprises a bottom layer, an absorption layer and a surface layer, the absorbing layer is positioned between the bottom layer and the surface layer; the absorption layer comprises an absorption core body and a liquid permeable layer, the absorption core body is coated with the liquid permeable layer, the absorption core body is provided with a first liquid absorption area and a plurality of flow guide structures, and the flow guide structures are used for diffusing liquid absorbed by the absorption core body; the flow guide structure is integrally formed in the adsorption forming process of the absorption core body, the absorption core body comprises a second liquid absorption area, and the second liquid absorption area comprises the flow guide structure and the edge of the flow guide structure which extends outwards by 1 mm. The ratio of the fluff pulp density of the first liquid absorption area to the fluff pulp density of the second liquid absorption area ranges from 80% to 100%. The application has the effect of preventing the absorption core body from forming a high-density area.

The present disclosure generally relates to an absorbent pad (100) for a garment (200) and a garment (200) including the absorbent pad (100). The absorbent pad (100) includes a liquid-impermeable barrier layer (120), a functional assembly (110) attached thereto, and a peripheral assembly (130) attached to the periphery of the functional assembly (110), and is at least partially liquid-impermeable. The functional assembly (110) includes an absorbent layer (112) for absorbing liquid, the absorbent layer (112) attached to the barrier layer (120), and a wicking layer (114) for transferring liquid to the absorbent layer (112), the wicking layer (114) attached to the absorbent layer (112) and positioned to face the skin of a user in use. The wicking layer (114) and absorbent layer (112) are attached at discrete points (116) therebetween to facilitate liquid transport from the wicking layer (114) to the absorbent layer (112) around the periphery of the discrete points (116).

The invention discloses a shape memory alloy-based 3D IC self-adaptive heat dissipation structure, which comprises an upper cover plate, a first semiconductor device layer, a first liquid collection layer, a first fin layer, a second semiconductor device layer, a second liquid collection layer and a second fin layer, and is characterized in that the edge of each layer is provided with an inlet and an outlet; the first liquid collecting layer, the first fin layer, the second liquid collecting layer and the second fin layer are respectively provided with a concave cavity for guiding cooling liquid to flow, fin arrays are arranged on the concave cavity of the first fin layer and the concave cavity of the second fin layer, the fins are made of shape memory alloy, and when the change of the temperature of a heat source is sensed, the fin arrays are connected with the first fin layer and the second fin layer. The shape of the temperature-sensitive shape memory alloy is rapidly changed, so that the temperature-sensitive shape memory alloy is changed from a vertical state to a bending and twisting state, the size and the strength of vortexes near the fins are changed, and self-adaptive adjustment of the convection heat exchange coefficient of the channel wall surface is achieved accordingly. The micro-channel has the advantages that the local heat exchange coefficient of the micro-channel is automatically adjusted according to the working condition of a chip, and the working efficiency of the micro-channel is improved. And the high-heat-flux chip can be effectively cooled.

The utility model discloses a sampling pipe capable of being adjusted along with a liquid level, a sampling device, a reaction device and a storage device. The sampling pipe comprises a connecting pipe, a movable pipe and a buoyancy component, wherein the movable pipe is telescopically connected with the connecting pipe in an inserted manner; the buoyancy component is matched with the liquid level and drives the movable pipe to axially move on the connecting pipe along with the change of the liquid level; and a sealing piece is arranged between the movable pipe and the connecting pipe. According to the scheme, the sampling position can be automatically adjusted according to the liquid level height, accurate sampling from a target liquid layer is ensured, and sampling errors caused by liquid level changes or liquid layering are avoided.

1. Name of the Design Product: Homogenizer. 2. Use of the Design Product: Based on the interaction between a high-speed rotating rotor and a stator, the homogenizer enables materials to be efficiently, rapidly and evenly distributed into one or more immiscible phases into another continuous phase under the combined action of strong shear, extrusion, liquid layer friction and turbulence in the narrow gap between the stator and the rotor. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph Best Showing the Design Key Points: Perspective view. 5. The claimed design includes color.

The invention discloses an amplitude-phase decoupling type metasurface, and relates to the technical field of electromagnetic metasurfaces. The invention aims to solve the problem that there is no amplitude-phase decoupling metasurface at present. The graphene composite board sequentially comprises a graphene adjustable structure, a foam board layer, a first metal patch, a second metal patch, a first substrate layer, a metal ground, a bonding layer and a second substrate layer from top to bottom, the graphene adjustable structure sequentially comprises a first lining plate layer, a first graphene layer, an ionic liquid layer, a second graphene layer and a second lining plate layer; the first metal patch and the second metal patch are arranged on the upper surface of the first substrate layer and are connected through the diode; a third square patch is further arranged on the upper surface of the first substrate layer, and the third square patch is connected with the second metal patch through an inductor; one end of the second metal conductive column is connected with the lower surface of the second substrate; the other end of the first metal conductive column is connected with the lower surface of the first metal patch. The invention is used for controlling electromagnetic waves.

A digital PCR system has at least one droplet forming assembly and a droplet spraying hole assembly. The droplet forming assembly has at least one droplet collecting tank; the droplet spraying hole assembly is connected below the droplet forming assembly. The droplet spraying hole assembly has a plurality of droplet spraying holes in communication with the droplet collecting tank. Vaporization parts are provided in the droplet spraying holes and used for vaporizing digital PCR solution liquid layers in the droplet spraying holes and quickly pushing the vaporized digital PCR solution liquid layers into droplet forming oil in the droplet collecting tank to form digital PCR droplets.

The invention relates to the technical field of detection and sampling, in particular to a naphtha production multi-process detection and sampling system which comprises a closed sampler, the closed sampler comprises a liquid storage tank used for temporarily storing naphtha, and a liquid suction mechanism used for stretching into different depth positions in a reaction kettle for sampling is arranged on the lower side of the closed sampler. According to the closed sampler, a liquid guide pipe in the liquid suction mechanism is matched with an opening and closing assembly, the sliding depth of the liquid guide pipe and opening and closing of a flow guide opening of a blocking cover are manually adjusted, and the closed sampler can accurately stretch into different liquid layer positions in a reaction kettle for sampling; by adopting the synergistic effect of the annular floating plate, the scraping frame and the constant-force spring in the cleaning mechanism, the annular floating plate slides up and down along with the floating of the liquid level to drive the spiral scraping plate of the scraping frame to rotationally scrape the inner wall of the liquid storage tank, high-viscosity naphtha residues are effectively removed, and cross contamination of different batches of samples is avoided.

The invention relates to a process for operating a mass transfer column comprising internals and at least one liquid distributor (1) for distributing a multi-phase liquid, wherein the liquid distributor (1) comprises a trough (9) for collecting the multi-phase liquid to be distributed onto internals in the mass transfer column, the trough (9) having a bottom (19) and side walls (7), wherein openings (17) for distributing the multi-phase liquid are formed in the trough (9) and / or in drip tubes (15) extending through the bottom (19) into the trough (9), wherein the openings (17) are arranged in at least three different heights. In the process, different phases of the multi-phase liquid separate into different layers in the trough, and the phases flow through openings at different heights, respectively.

The utility model relates to the technical field of disposable absorption articles, and provides a pair of pull-ups with wavy rubber bands, which not only can reduce the compression of the pull-ups to improve the comfort level, but also can improve the wearing stability, and comprises a liquid-tight layer, an absorption core layer and a liquid-permeable layer, and the front waist part and the rear waist part of the liquid-tight layer are also provided with elastic wrapping layers; the elastic wrapping layer comprises an outer surface layer, an elastic layer and an inner surface layer; the elastic layer comprises at least two elastic plied yarn layers, namely a first elastic plied yarn layer and a second elastic plied yarn layer; the first elastic plied yarn layer is composed of a plurality of first elastic threads, the second elastic plied yarn layer is composed of a plurality of second elastic threads, and at least one of the first elastic threads and the second elastic threads is arranged in a wave shape; the first elastic lines on the first elastic plied yarn layer and the second elastic lines on the second elastic plied yarn layer are continuously and mutually staggered to form a plurality of four-direction tightening areas.

The invention relates to the technical field of nanocrystal materials, in particular to a preparation method for pure-phase 001 crystal orientation Ni3S2 nanocrystals based on a reverse epitaxial growth method, which comprises the following steps: S1.1, pretreating a metal substrate to fully remove impurities such as sweat stain, oil stain, oxide skin and residual acid liquor on the surface; s1.2, in the atmosphere, placing the mutagenesis seed crystal in a hydrothermal kettle, adding 45-50 mL of a liquid-phase transmitter, suspending the pretreated metal substrate under a liquid layer by using a polytetrafluoroethylene wire, sealing and storing, heating at 155-160 DEG C for 10-12 hours, cooling, taking out the metal substrate, and washing with ethanol and deionized water in turn for three times to obtain Ni3S2 nanocrystals; the substrate structure is selectively mutated by adopting a reverse epitaxial growth method and utilizing the reactivity of the film, so that the growth direction of the Ni3S2 crystal is effectively controlled, the pure-phase Ni3S2 crystal with a specific crystal face is obtained, meanwhile, the mutated seed crystal automatically falls off in the form of metal powder after participating in the reaction, the procedure of product separation is omitted, and the technological process is simplified.

The utility model relates to a valve sealing property testing arrangement, including detection case and support platform, its technical key point is: support platform is hollow round table and is equipped with with its intercommunication lower positioning ring on the upper surface, the lower surface of support platform is equipped with the extension pipe of inserting detection case bottom liquid layer, the outer circumferential surface of support platform is equipped with lower horizontal air inlet pipeline, the side of detection case is equipped with cantilever frame, and the longitudinal cylinder is fixed in cantilever frame top plate end, and the lower end of the cylinder rod of longitudinal cylinder is fixed with upper pressure seat, and upper pressure seat is hollow seat and is equipped with with its intercommunication upper positioning ring on the lower surface, and the center line of upper positioning ring and lower positioning ring coincides, and the outer circumferential surface of upper pressure seat is equipped with upper horizontal air inlet pipeline, and upper horizontal air inlet pipeline is equipped with the longitudinal air escape pipeline that end extends to the below of detection case bottom liquid layer. The device solves the problem that the accuracy of one-way detection needs to be improved, and the sealing property detection accuracy of valve body is significantly improved through bidirectional detection structure.