257results about How to "Good waterproof effect" patented technology

The invention relates to a construction method for applying polyurea to the old flexible waterproof roof for renovation transformation, which comprises the steps of: (1) base layer cleaning; (2) field maintenance; (3) primer brush application: adopting epoxy modified polyurethane type materials with the 100 percent solid content as primer to be directly coated and brushed on the base layer; (4) polyurea waterproof layer formation through polyurea spraying and coating on the primer surface, wherein the spraying and coating construction is completed by regions, the construction overlap edge is designed into 150 to 200mm, the secondary construction is carried out, the solvent cleaning is carried out before secondary polyurea spraying and coating at time intervals more than 6h, then, the primer is coated and brushed, the polyurea is then sprayed and coated, and the thickness of the polyurea waterproof layer is not lower than 1.5mm; and (5) facing formation through finish coat brush application within 6h after the polyurea spraying and coating: the finish coat adopts aliphatic polyurethane materials, and the facing thinness is not lower than 0.2mm. Roofs after renovation transformation by the construction method have the advantages that the waterproof effect is good, and in addition, the appearance is attractive.

The invention discloses a method for simulating soil slope instability induced by groundwater. The method is characterized by comprising the following steps: a, putting a physical model on a centrifugal machine; b, raising the height of an external water tank, opening a water outlet valve and a water inlet valve, carrying out water seepage into a soil layer according to the thickness of a saturated soil layer and completing the saturation process of a soil mass; c, closing the water inlet valve, reducing the height of the external water tank, improving the centrifugal acceleration to solidifyand disperse the internal pore water pressure of the physical model; d, after the solidification is finished, opening the water inlet valve, raising the height of the external water tank to the corresponding height according to the preset water level height of an internal water tank; obtaining different infiltration capacity of the water to the slope when the water in the internal water tank seepsinto the soil layer and stays at different heights, and observing the wetting front change and the slope deformation condition of the physical model. The method disclosed by the invention has the advantages that the height of the groundwater level can be accurately adjusted in real time and washing of water current to the slope body is prevented; in the whole test process, high operability, highreliability and good test effect are realized.

The invention discloses a handheld stable balancing device, comprising a tripod head assembly, a handle component and waterproof structures, wherein the tripod head assembly comprises a first rotating part, a second rotating part, a third rotating part and a fixed part which are sequentially connected, a rotating shaft of the first rotating part, a rotating shaft of the second rotating part and a rotating shaft of the third rotating part are respectively vertical to one another two by two, and the fixed part is connected with the first rotating part; the handle component is connected with the third rotating part and is electrically connected with the tripod head assembly; the waterproof structures are respectively arranged at the connecting parts of all the parts of the handheld stable balancing device. According to the handheld stable balancing device provided by the invention, a camera is fixed on the tripod head assembly, and a handle is electrically connected with the tripod head assembly, so that the tripod head assembly can be controlled to rotate at all angles by means of the handle, and the angle of the camera is further adjusted; furthermore, the waterproof structures are respectively arranged at the connecting parts of all the parts, so that the handheld stable balancing device has a better waterproof effect.

The invention belongs to the field of water-proofing agents and discloses a fluoroalkyl-modified composite organosilicon water-proofing agent and a preparing method and application thereof. The fluoroalkyl-modified composite organosilicon water-proofing agent is prepared from, by mass, 10-15% of short-carbon-chain alkyl siloxane, 10-15% of long-carbon-chain alkyl siloxane, 40-45% of fluoroalkyl siloxane, 2-3% of complex emulsifier, 2-5% of polyvinyl alcohol, 1-5% of silane coupling agent, 1-3% of aluminum sulfate and the balance water. Short-carbon-chain alkyl siloxane, long-carbon-chain alkyl siloxane and fluoroalkyl siloxane are adopted for being used together to form a composite system, and it is ensured that the water-proofing agent has a good waterproof property and has excellent permeability and weather resistance; the water-proofing agent is W/O/W type pasty, and capable of being widely applied to the waterproof fields of concrete, bricks, mortar and the like, and the antifouling fields of glass and the like, and stability of the water-proofing agent is effectively achieved.

The invention discloses a production method for a sealing gasket, which is characterized by comprising the following steps of: 1, according to a prescription, stirring graphite powder, rubber, reinforced fibres and an antiager in a stirrer, uniformly mixing, and then discharging; 2, adding an accelerant in the mixture after discharging, uniformly mixing, then placing the mixture in a mould, and tabletting at normal temperature; 3, adding a metal layer between two tablets to form a composite tablet, and performing rolling vulcanization on the composite tablet in a vulcanization machine having a vulcanization temperature which is controlled to be 165-200 DEG C, so as to obtain a semi-finished product; and 4, stamping the semi-finished product after vulcanization into the needed sealing gasket, namely, the finished product. Compared with the prior art, the production method disclosed by the invention has the advantages that the production process is simple, and the operation is safe and convenient; natural rubber is high in elasticity, so that the produced sealing gasket is good in elasticity and plasticity, and resistant to corrosion and wear; and the sealing gasket is not easy to age via the rolling vulcanization.

The invention relates to a preparation process of water swellable rubber which relates to the technical field of waterproof materials for concrete road and bridge building and is characterized rubbery being prepared by mixing, milling and vulcanizing natural rubber, a modified starch grafted acrylate copolymer and an additive, wherein raw materials are in the following parts by weight: 10-60 parts of natural rubber, 10-40 parts of modified starch grafted acrylate copolymer, 0.3-3 parts of sulfur, 1-2 parts of vulcanization accelerator, 1-5 parts of zinc oxide and 0.5-2 parts of stearic acid. The preparation process is simple and has unique principle; and a prepared product has better elasticity, strength and extensibility, particularly has water swelling property, higher swelling rate and good water preventing and stopping effects and simultaneously has corrosion resistance to organic solvents, such as acid, alkali, salt, oil and the like, superior aging resistant performance, no flow at high temperature, no embrittlement cracking at low temperature, long service life, convenient construction, lower cost, no toxicity, no pollution and wide application range.

The invention discloses a waterproof frame of a solar cell assembly. The waterproof frame has two types. One side of the waterproof frame and an outboard frame groove of the solar cell assembly are installed together cooperatively, and the other side of the waterproof frame and a roof structure are installed together. Besides, the two types of waterproof frames are formed by direct bending of thin iron sheets. According to the invention, the waterproof frame, which is used for connection between a photovoltaic cell assembly and a roof structure, has a good waterproof effect; besides, the frame is easy to manufacture and can be installed and replaced conveniently.

The invention discloses a rainy season wet soft roadbed filling construction method. The method comprises the following steps of S1, soil filling water content testing and quicklime doping amount design; S2, test section construction; S3, material preparation; S4, lower bearing layer treatment; S5, measurement and lofting; S6, paving; S7, mixing; S8, leveling and light pressing; S9, rolling; S10,maintenance; and S11, later inspection. According to the rainy season wet soft roadbed filling construction method, during the construction, the quality of the subgrade filling can be ensured, the phenomena of subgrade deformation, subgrade bed frost boiling and mud pouring can be reduced, the roadbed construction efficiency can be accelerated, the construction period and cost can be saved, and the construction quality and efficiency of rainy season roadbeds are guaranteed; and meanwhile, the roadbed filling quality is guaranteed, the roadbed filling construction progress is accelerated, the construction site personnel and machinery idling phenomenon is reduced, and the time for waiting for passing along the vehicles is reduced.

The invention discloses a waterproof anti-explosion box for a cable middle connector. The waterproof anti-explosion box comprises an upper cavity and a lower cavity connected through bolts, the upper cavity and the lower cavity are covered to form a middle connector bin, fast sand filling ports are formed in the upper portion of the upper cavity, end heads are arranged at the two ends of the upper cavity and at the two ends of the lower cavity, a plurality of waterproof grooves are formed in the inner walls of the end heads, and seal rings are arranged on the waterproof grooves. Cover bodies are arranged on the fast sand filling ports, and sealing flat gaskets are arranged between the cover bodies and the fast sand filing ports. The waterproof grooves and the seal rings are arranged on the upper cavity and the lower cavity, the waterproof effect is good, the fast sand filling ports are formed in the upper portion of the upper cavity, and the upper cavity can be conveniently filled with waterproof anti-explosion sand. The waterproof anti-explosion box for the cable middle connector is simple in structure, and can effectively prevent water from entering the anti-explosion box in the state of 1M water depth and provide the good operation environment for the middle connector. By means of the waterproof anti-explosion box for the cable middle connector, the waterproof performance of the cable middle connector is improved, cable faults caused after the middle connector is soaked in water are avoided, and the stable operation of a power grid is maintained.

The invention discloses a waterproof down coat which comprises a coat body and coat liner. The coat body is provided with an outer layer made of high-density water-repellent fabric and an inner layer made of warp-weft high-density coated fabric. The down liner comprises 80-85% of white goose down and 15-20% of white duck down. The outer layer of the down coat is made of the high-density water-repellent fabric, so that the waterproof down coat is highly waterproof and breathable. In addition, the down liner is subjected to waterproofing coating, so that waterproofing is improved further. The waterproof down coat is resistant to damp-induced deformation even in rainy days, and using effect and wearing comfort are totally unaffected.

The invention discloses an embedded-module solar photovoltaic system. The system comprises a plurality of photovoltaic modules, wherein the photovoltaic module comprise photovoltaic components, longitudinal brackets and transverse brackets; the photovoltaic components are embedded in a grid consisting of the longitudinal brackets and the transverse brackets and are connected with the longitudinal brackets through self-tapping screws; longitudinal directions of the photovoltaic modules are connected with one another through a radial flow groove, and transverse directions of the photovoltaic modules are connected with one another through a pressure plate; the tail ends of the photovoltaic modules are sealed by an edge sealing plate; the photovoltaic components comprise solar cell panels and component frames; the upper surfaces of the component frames are partially provided with convex marks; one side of each component frame is provided with an extending oblique part on which a vertical eave is arranged, and the other side of each component frame is provided with a cavity and a groove; the solar cell panels are arranged in the groove; and the component frames are fastened by frame corner connector. The embedded-module solar photovoltaic system realizes modular installation, brings convenience to the maintenance and replacement of the photovoltaic components, has good water resisting effect, can replace a conventional building enclosing member and realize the integration of photovoltaic buildings.

The invention belongs to the field of photovoltaic materials, and in particular to a doped perovskite solar cell and a method for preparing the same. The doped perovskite solar cell successively includes a FTO conductive glass substrate, a NiOx cavity transmission layer, a perovskite absorption layer, an electronic transmission layer, a buffering layer and a metal electrode layer which are successively laminated from bottom to top. The perovskite absorption layer is doped with MoS2 which has strong hydrophobic property and high charge transmission property, which can effectively increase the photoelectric property and stability of the solar cell. The doped perovskite solar cell has the characteristics of simple components, easy preparation, excellent repeatability, no hysteresis effects, and suitability for industrial production.

The invention discloses a new type material integrating decoration, waterproof and heat insulation and the preparation method, which is characterized in that: the new type material comprises a heat preservation and insulation layer; an anti-crack and protective waterproof layer is combined between the heat preservation and insulation layer and a decoration waterproof layer; the invention adopts the preparation steps that: the heat preservation and insulation layer is combined with the anti-crack and protective waterproof layer, and the anti-crack and protective waterproof layer is combined with the decoration waterproof layer. The invention has the advantages that: two waterproof layers and one heat insulation layer are provided; the first waterproof layer is made of one of the metal plate, polymerization cement mortar or the anti-crack and waterproof powder crack sealer; the decoration waterproof layer is coated on the metal plate, polymerization cement mortar or anti-crack and waterproof powder crack sealer, which forms the second waterproof layer; a color sand finish is formed by an external surface, integrating three functions of beautification and decoration, crack resistance and waterproof and heat insulation; the wall surface or the house surface has good waterproof, anti corrosive and anti-crack effects; the color sand facing is a flexible waterproof layer, and the house surface or the wall surface with high strength is wholly crack resistant.

The invention provides a home decoration toilet pipe-side floor drain treatment process. The treatment process comprises the steps of S1, digging out a groove in the concrete floor around the root of a pipeline, removing residue in the groove and cleaning the groove by use of water, S2, coating the groove with an interface waterproof agent once or twice under the condition of moist, S3, evenly mixing a multifunctional emulsion with quick-setting cement in the weight ratio of (0.3-0.5): 1 into a paste, applying the paste into the groove, and compacting and trowelling, S4, after the filler in the groove is solidified, coating the root and the four sides of the pipeline with a secondary pipe fixation waterproof glue. According to the home decoration toilet pipe-side floor drain treatment process, at least three waterproof layers, namely the interface waterproof agent layer, the mixed layer of the multifunctional emulsion and the quick-setting cement, and the waterproof layer of the pipe fixation waterproof glue are provided. Due to triple waterproofing operations, the waterproof effect is excellent and the service life is long.

The invention discloses a corrosion-resistant waterproof coating for environmental protection equipment and a preparation method of the corrosion-resistant waterproof coating. The coating is prepared from the components as follows: epoxy resin, polyvinyl alcohol, polyether polysiloxane copolymer, silane coupling agent, graphene, boron nitride, ultrafine mica powder, glass fibers, aluminium oxide, nano titanium dioxide, paste attapulgite, filler and anti-foaming agent. The preparation method comprises the following steps: firstly, carrying out reaction among the epoxy resin, the polyvinyl alcohol, the polyether polysiloxane copolymer and the graphene; then adding the boron nitride, the aluminium oxide, the nano titanium dioxide and the ultrafine mica powder which are ground; adding the silane coupling agent again to carry out reaction; mixing with the paste attapulgite, the filler, the glass fiber and the anti-foaming agent after the reaction is completed so as to obtain the coating; then spraying the coating on a surface of the environmental protection equipment. The coating has a preferable waterproof effect and also has preferable corrosion resistance performance and abrasion resistance performance; moreover, the service life of the equipment is prolonged, and the using cost of the equipment is reduced.

The invention discloses a laser cutting die processing method and particularly discloses a processing method for a laminated composite cutting die plate. The processing method comprises the steps of rotary cutting for obtaining a veneer, grinding the veneer in a beveled way, splicing the veneer in a beveled way, soaking the veneer, soaking a glass fiber cloth, drying, gluing onto PVC, assembling and thermally pressing, reconditioning and the like. Aiming at solving the problems of poor weather resistance, poor corrosion resistance, easy deformation at high temperature and the like existing in a wooden laser cutting die plate, a product obtained through the processing method disclosed by the invention comprises an upper surface layer and a lower surface layer which are both PVC thin layers, a secondary outer layer which is the bevel connection veneer, and other layers which are formed by laminating the glass fiber cloth and wooden layers in a staggered manner. The obtained product by adopting the method provided by the invention has the advantages of light weight, high strength, strong thermal stability, difficulty in deformation and the like and has significant economic benefit and market value.

The invention discloses a pond field experimentation device and a using method thereof and relates to a device for experimental study of pond water area ecology and a using method thereof. The problems that the water oxygenation effect is bad, the water inlet and drainage are inconvenient, fishes are difficult to escape and the requirements of experimental study of pond water area ecology cannot be met in the conventional field experimentation enclosure ecosystem are solved. The pond field experimentation device comprises waterproof cloth, a U-shaped pipe, an oxygenation aeration device, an anti-escape net, two filtering nets, two straight pipes, four upright rods and four transverse rods, wherein the four upright rods are arranged in an array; a cross rod is connected between two upright rods; and the four upright rods and four transverse rods form a square frame. The field enclosure experimentation method mainly comprises the following steps: 1, inserting the upright rods on the square frame into the bottom of the pond; 2, injecting water into the square frame with the waterproof cloth; 3, oxygenating and aerating in water; and 4, draining water in the square frame. The pond field experimentation device is used for research of pond water area ecology.

The invention discloses a mothproof waterproof magnesium oxide refractory slab. The refractory slab is prepared by mixing the following mixed raw materials in parts by weight: 72-98 parts of light calcined magnesia, 25-35 parts of magnesium chloride, 5-8 parts of perlite, 8-20 parts of wood bits, 4-8 parts of talcum powder, 1-8 parts of wollastonite powder, 1-10 parts of camphor, 0.1-1 parts of mothproof essential oil, and 2-5 parts of neoprene latex. The mothproof waterproof magnesium oxide refractory slab disclosed by the invention is quite good in halogen resistance, less in warping, deformation and cracking possibility, mothproof and quite long in service life.

The invention provides a cave type prefabricated assembly comprehensive pipe rack and a method for mounting the same. The cave type prefabricated assembly comprehensive pipe rack comprises arc-shapedroofs, partition plates, bottom plates and groove-shaped supports. The arc-shaped roofs, the partition plates, the bottom plates and the groove-shaped supports are prefabricated of waterproof concrete; free ends of the arc-shaped roofs are lapped in grooves formed in the tops of the corresponding partition plates and are fixed by the aid of waterproof concrete by means of pouring; the bottoms of the partition plates are inserted in the groove-shaped supports and are fixed by the aid of waterproof concrete by means of pouring; the groove-shaped supports are arranged at the upper ends of the bottom plates, and integral components are formed by the groove-shaped supports and the bottom plates; each pipe section is enclosed by the upper portion, two sides and the lower portion of an integral component which is formed by the corresponding arc-shaped roofs, the corresponding partition plates, the corresponding bottom plates and the corresponding groove-shaped supports, and the pipe sectionsare sequentially connected with one another to form a pipe rack. The cave type prefabricated assembly comprehensive pipe rack and the method have the advantages that the cave type prefabricated assembly comprehensive pipe rack can be conveniently prefabricated in factories and is convenient to transport; the cave type prefabricated assembly comprehensive pipe rack with the excellent integrity andstability can be excellent in performance in the aspects such as waterproof effects.

The invention relates to an intelligent cable connector. The intelligent cable connector has functions of a cable extending connector and an insulated connector. Besides, the intelligent cable connector is provided with a photoelectric extending connector which comprises semiconductive photoelectric separation fingerstalls, optical fiber protective jackets, an optical fiber connector, and heat-insulation binding belts, wherein the semiconductive photoelectric separation fingerstalls are both cylindrical heat shrinking tubes which are prefabricated with selective semiconductive material and are of one-in and two-out structure or one-in and multi-out structure, and are fastened to a metal shielding layer through the heat-insulation binding belts, the optical fiber protective jackets are metal jackets replacing a temperature measuring unit, and are matched with the photoelectric separation fingerstalls to protect temperature measuring fibers from being damaged, the number of the photoelectric separation fingerstalls is two, and the photoelectric separation fingerstalls ensure photoelectric separation. According to the intelligent cable connector, an original insulator structure and an original electric field structure are not damaged, photoelectric performance of an original product is not reduced, and meanwhile a function of on-line accurate monitoring of cable temperature is achieved.

The invention relates to a structure for grouting reinforcement of an existing subway tunnel by inserting profile steel into a grouting pipe. The structure comprises a tunnel segment ring, the grouting pipe, a grouting positioning device, the section steel and a stratum. The structure and a method of the structure have the beneficial effects that a tip is arranged at the bottom of a grouting steelfloral tube, and small holes arranged in a plum-blossom-shaped mode are formed from the middle surface to the bottom surface from a sparse mode to a dense mode, so that the smooth inflow and outflowof grout are guaranteed, and the grouting reinforcement effect is improved, and meanwhile, a main grouting pressure releasing area is moved backwards to the bottom of the grouting pipe, so that the situation that due to the fact that the secondary disturbance of grouting is too large, the deformation of an existing tunnel segment ring is caused, and then the deformation of a whole tunnel structureis caused is avoided; and multiple times of material blocking is carried out, and a waterproof cushion layer, a rubber ring and the like are arranged, so that the problem of possible leakage during tunnel grouting construction and subsequent steps is well solved, and compared with an existing reinforcement structure and an existing construction method, the novel structure and the method are greatly improved in waterproof performance.

The invention relates to a prefabricated underground diaphragm wall and a construction method thereof, and belongs to the technical field of underground enclosure structures and construction. The prefabricated underground diaphragm wall comprises a prefabricated joint and a prefabricated diaphragm wall body, wherein the prefabricated joint and the prefabricated diaphragm wall body are connected with each other, the section of the prefabricated joint is in an I shape, the concave surfaces on the left side and the right side are in a semi-arc shape and are made of reinforced concrete, an impact-resistant pipe is arranged in the middle, and joint reserved bolt holes are formed in the upper surface and the lower surface. The prefabricated diaphragm wall body is composed of a plurality of prefabricated diaphragm wall body sections with rectangular sections, the upper surfaces and the lower surfaces of the prefabricated diaphragm wall body sections are provided with wall reserved bolt holes,and the left sides and the right sides of the prefabricated diaphragm wall body sections are provided with convex bodies, grooves and connecting reserved bolt holes. The groove of the prefabricated diaphragm wall body section connected with the prefabricated joint is semicircular, and a water stop rubber pad is arranged on the contact surface. The prefabricated underground diaphragm wall is highin fabricating degree, convenient to lift and assemble, good in waterproof stress effect and high in maneuverability, and the problems that hoisting is inconvenient, sandy soil is backfilled at the joint and poured concrete is prone to streaming around can be effectively avoided.

The invention discloses a repair structure for a transition area of an intelligent highway concrete bridge expansion joint and a construction method thereof. The repair structure comprises a bonding layer, a reinforcing layer, an anti-deformation layer and a passing layer, wherein the bonding layer is arranged on the surface of a reserved groove of the bridge expansion joint; the reinforcing layercomprises reinforcing beams, a first connecting chain, a second connecting chain, a bushing and concrete; the two reinforcing beams are symmetrically arranged on two inner side edges of the reservedgroove; the first connecting chain is arranged between the reinforcing beams and the reserved groove; two ends of the second connecting chain are separately welded to the two reinforcing beams; the bushing is arranged on the second connecting chain in a sleeving manner; the concrete is poured between the two reinforcing beams; the anti-deformation layer comprises a silica gel gasket, an H-shaped rack, a wire rope and a rubber block; and the H-shaped rack is arranged on the reinforcing beams, the wire rope is connected to two inner side walls of the H-shaped rack, the rubber block fills the H-shaped rack, and the silica gel gasket is arranged between the H-shaped rack and the reserved groove. The repair structure avoids upheaval or breakage of a bridge floor due to thermal expansion and cold contraction while playing a reinforced connecting role to two sides of the bridge expansion joint, and has a very good shock absorbing effect to driving.

The invention relates to a ventilating waterproof LED display module box which comprises a bottom shell and a waterproof cover plate. The waterproof cover plate covers the rear of the bottom shell, an inner cavity is enclosed by the waterproof cover plate and the bottom shell, electronic elements of an LED display module are arranged in the inner cavity, an air inlet and an air outlet are arranged on the waterproof cover plate, the air inlet comprises a plurality of air inlet slotted holes, water retaining ribs projecting outwards from the inner surface of the waterproof cover plate are arranged above the uppermost air inlet slotted hole and below the lowermost air inlet slotted hole, waterproof baffle plates cover the water retaining ribs, a waterproof ventilating cavity is enclosed by the water retaining ribs and the waterproof baffle plates, and the air outlet direction of airflow flowing out of the air outlet is parallel to the waterproof cover plate in ventilation and heat dissipation.

The invention discloses an electric vehicle charging connector assembly comprising a connector female portion and a connector male portion. The connector male portion comprises a male portion seat and a male needle assembly which is fixedly installed in the male portion seat; the connector female portion comprises a female portion seat, a female needle assembly and a connecting seat, and the female needle assembly is fixedly installed in the female portion seat and is connected to the male portion seat in a plugged manner; the electric vehicle charging connector assembly is characterized in that the portion of the male portion seat extending into the female portion seat is sleeved with a sealing sleeve, a sealing ring is fixedly arranged in the connecting seat, the female portion seat is fixedly connected to the sealing ring and is in radial clearance fit with the connecting seat, and the sealing ring is provided with a radial position adjusting mechanism integrally. The electric vehicle charging connector assembly has the advantages that after the connector female portion and the connector male portion are connected in a plugged manner, the fine waterproof effect of the male needle assembly and female needle assembly is achieved, and the charging reliability and safety are improved.

The invention discloses a waterproof joint structure for a door/window hole. The waterproof joint structure comprises a building main body, a component, a flashing belt and a sealant, wherein a hole for mounting the component, the flashing belt and the sealant are arranged on the building main body; the flashing belt is attached to an overlapping part of the hole and the component, and the overlapping boundary of the hole and the component is completely covered by the flashing belt; a heat-preservation layer and a decorative layer are sequentially arranged on the outer sides of the flashing belt and the building main body; the sealant is adhered to a gap between the decorative layer and the component. According to the waterproof joint structure, by virtue of double-effect treatment of the flashing belt and the sealant, optimal waterproof effects are achieved; the flashing belt has the characteristics of excellent aging resistance, persistent adhesion, excellent stretching ductility, convenience in construction and capability of effectively preventing water leakage and seepage, and the problems of non-ideal using effects of a rigid flashing plate for a wall body hole and a component part and difficulty in the use of the rigid flashing plate are solved.

The invention discloses an improved waterproof construction of an underground structure deformation joint. The improved waterproof construction comprises a main structure. A deformation joint is formed in the main structure, and internally provided with a waterproofing membrane, a waterproof strengthened story, an embedded steel edge rubber water stop, a pre-melting mode liquid expansion rubber water stop and a water receiver from an enclosure structure to the main structure in sequence. The deformation joint is internally provided with a base plate which is disconnected at the position of theembedded steel edge rubber water stop and the pre-melting mode liquid expansion rubber water stop; and the outer side of the base plate is provided with a PE foam rod. According to the waterproof construction, the waterproofing membrane, the waterproof strengthened story, a back type water stop, the embedded steel edge rubber water stop, the pre-melting mode liquid expansion rubber water stop, the water receiver and the like are arranged at the position of the deformation joint, so that the problem of low waterproof ability at the position of the deformation joint is solved. The improved waterproof construction of the underground structure deformation joint has the advantages of easy construction and installation, good waterproof effect and high usability.

The invention discloses a mobile phone shell with a dustproof net and a manufacturing method thereof. the mobile phone shell comprises a body and filter net foam, wherein the body is a hard plastic material; a sound guide hole passes through the inner surface and the outer surface of the body; the inner surface of the body is provided with a concave cavity; the sound guide hole is communicated with the concave cavity; the filter net foam is embedded in the concave cavity and seals and covers the sound guide hole; the filter net foam comprises a first double-faced adhesive layer, a dustproof net, a second double-faced adhesive layer, a waterproof breathable film, a Mylar layer and a release film stacked sequentially from outside to inside. As the filter net foam with a specific structure is adopted and the waterproof breathable film adopting a specific formula is matched, the filter net foam is embedded in the concave cavity for long-time sealing and bonding, water can not penetrate to the concave cavity from the sound guide hole, good waterproof effects are realized, the waterproof grade can reach IP68, dust can be blocked on the dustproof net and can not enter the waterproof breathable film, cleaning is facilitated, and good sound guide effects can be kept.

The invention relates to a hydrophobic coating, a preparation method thereof, an application thereof and an absorbable implantable device. The hydrophobic coating is the coating formed by cross-linking of hydrophobic monomers, and the hydrophobic monomer is a segmented copolymer comprising a hydrophobic block, a degradable block, and a cross-linking functional group. When the hydrophobic coating provided by the invention covers the surface of a degradable material, the hydrophobic block enables the hydrophobic coating to function as a good water-resisting effect at an early stage, so that thedegradable material hardly degrades; in the later stage, the degradable block is degraded, and the porosity of the hydrophobic coating is increased, so that the body fluid can contact the degradable matrix material through the pores of the hydrophobic coating to promote the degradation of the matrix material.

The invention provides a synthesis method of a silicone fluoride-free water-proofing agent modified with polyurethane and acrylic acid. The silicone fluoride-free water-proofing agent modified with the polyurethane and the acrylic acid is obtained through the steps of synthesis of single-end aminoalkylsilicone and double-end hydroxyalkyl silicone, synthesis of a polyurethane-modified silicon macromonomer, free radical emulsion polymerization of the macromonomer, and the like, a special molecular structure is adopted, compared with the prior art, the silicone fluoride-free water-proofing agentmodified with the polyurethane and the acrylic acid has a better water-proof effect and a good hand feeling, and the laundering durability is more excellent.