67results about How to "Does not affect water resistance" patented technology

The invention provides a readily-foaming emulsifying agent. The readily-foaming emulsifying agent consists of the following components in percentage by weight: 60 to 40 percent of surfactant and 40 to 60 percent of wetting and stabilizing agent, wherein the surfactant at least comprises S-80 with high hydroxyl value. The main components and compounded products of the emulsifying agent are dissolved into oil easily; and the emulsifying agent is emulsified with aqueous solution of ammonium nitrate inorganic salt to form a latex matrix, and after the latex matrix is added into aqueous solution of sodium nitrite, bubbles are generated to sensitize the latex matrix into emulsion explosive.

The invention discloses a flexible display panel and a display device. A substrate, a first barrier dam, a second barrier dam, an organic electroluminescent structure, a package film layer and routing above the package film layer are comprised. Since at least one opening is arranged in the first barrier dam and the second barrier dam, the routing sequentially runs through the opening in the first barrier dam and the opening in the second barrier dam to extend to the edge of the substrate, the routing does not need to climb a high wall formed by the first barrier dam and the second barrier dam, and large segment difference is avoided. Nonuniform routing width caused by segment difference can be avoided. The problem of routing breaking or short circuit is avoided. Due to the fact that the positive projection of the opening in the first barrier dam on the second barrier dam does not overlap with the opening in the second barrier dam, the waterproof capacity of the barrier dams is not affected by the openings in the first barrier dam and the second barrier dam.

The invention discloses an environment-friendly fireproof coating and a preparation method thereof, and relates to the field of building coatings. The environment-friendly fireproof coating is prepared from the following raw materials: a macromolecular emulsion film forming matter, an inorganic film forming matter, an intumescent organic flame retardant, a non-intumescent inorganic heat-insulating filler, an intumescent inorganic heat-insulating filler, reinforced fibers, nano rare earth oxide, a coupling agent, a coalescing agent, a dispersing agent, a thickening agent, a pH regulator, deionized water and the like, wherein the intumescent organic flame retardant is an intumescent flame retardant containing N-P cage type macromolecules. The coating is excellent in fireproof performance, high in expansion multiple and fireproof performance, long in fire-resistant time and excellent in waterproof performance. The invention further discloses a preparation method of the environment-friendly fireproof coating.

The invention relates to borate antiwear and extreme pressure additive and a preparation method thereof. The additive mainly comprises oil media, dispersant and macromolecule polymerization borate, and the weight percentage is as follows: 10 to 50 percent of oil media, 1-5 percent of dispersant and 50 to 90 percent of macromolecule polymerization borate; the oil media is the mixture of mineral base oil, synthetic base oil, mineral oil and synthetic oil; the dispersant adopts C12-C22 fatty acid metallic soap or C12-C22 hydroxyl fatty acid metallic soap; the preparation method is, firstly, according to the molar ratio of 1:1 to 0.2:1, caustic potash and boric acid are added in a certain amount of water in sequence, and heated to 70 to 90 DEG C and react for a certain time; secondly, one or several types of the above base oil is added, and heated to 100 to 200 DEG C, the water is evaporated, and then heated to 200 to 230 DEG C, and polymerization reaction lasts for 0.5 to 1h; thirdly, the mixture is cooled down to approximate 180 DEG C, one or several types of the above dispersant is added, and continuously cooled down to approximate 110 DEG C, took out of the reaction vessel, homogenized under high pressure with a homogenization pump, and the finished product is obtained; the invention has the advantages that the technology is simple; the operation is easy; the water resistance is good; the steadiness is good; the antiwear and extreme pressure property is excellent; and the application range of the borate is widened.

The invention relates to an anti-corrosion mobile floating island. The anti-corrosion mobile floating island comprises a working platform, a plurality of first buoys, a plurality of second buoys and a connecting component, wherein the connecting component is used for fixedly connecting the working platform, the plurality of the first buoys and the plurality of the second buoys; the connecting component comprises a plurality of first connecting units; and each first connecting unit comprises a first connecting column and a second connecting column, wherein two ends of the first connecting column are fixedly connected with the working platform and the side surface of one first buoy, respectively; the radial section of the first connecting column is elliptical; elliptical semi-major axis where the first connecting column is placed is vertical to the axial direction of the first buoy; two ends of the second connecting column are fixedly connected with the side surface of one first buoy and the side surface of one second buoy, respectively; the radial section of the second connecting column is elliptical; the elliptical semi-major axis where the second connecting column is placed is vertical to the axial direction of the first buoy; and the axial direction of the second connecting column of each first connecting unit is coincided with the axial direction of the first connecting column. The anti-corrosion mobile floating island provided by the invention has the advantage of good seakeeping capability.

The invention discloses a square tube sealing connector. An upper connecting strap comprises an upper strap and a side strap perpendicular to the upper strip, one end of the upper strap is in the form of a slope, a waist-form hole for installing an upper tightening bolt is formed in the close side of the slope, the lower end of the side strap perpendicular to the upper strap is in the form of a sliding plate, and a waist-form hole for installing a lower tightening bolt is formed in the close side of the sliding plate. A lower connecting strap comprises a lower strap and a side strap perpendicular to the lower strap, one end of the lower strap is in the form of a slope, a hole for installing a lower tightening bolt is formed in the close side of the slope, the upper end of the side strap perpendicular to the lower strap is in the form of the sliding plate, and a hole for installing an upper tightening bolt is formed in the close side of the sliding plate. The upper connecting strap and the lower connecting strap are connected through the upper tightening bolts, the lower tightening bolts and corresponding connecting nuts. The square tube sealing connector is reasonable in structure, good in tightening and sealing performance and convenient to use.

The invention belongs to the technical field of photovoltaic application and particularly discloses a waterproof structure of a household roof photovoltaic power generation system. The waterproof structure comprises photovoltaic assemblies. A flow guide groove is formed between two adjacent rows of photovoltaic assemblies in the slope direction. On the higher side of a roof slope, the high-position ends of the photovoltaic assemblies in the same row are connected and installed through first support members. On the lower side of the roof slope, the low-position ends of the photovoltaic assemblies in the same row are connected and installed through second support members. In the roof slope direction, the adjacent ends of the photovoltaic assemblies in the front row and the rear row which are adjacent are connected through front row and rear row connection assemblies. Waterproof side baffles are arranged on the left side and the right side of each photovoltaic assembly in the flow guide groove direction. The waterproof structure is good in waterproof performance, reduces air flow speed to some extent while effectively cooling the photovoltaic assemblies, reduces the possibility that a photovoltaic array is blown away by the wind and improves safety of roof overall structure.

The invention discloses a concrete support with a temporary support being used as a permanent structure in a cover-excavation method and a construction method of the concrete support. The constructionmethod comprises the following steps that S10, ground leveling is conducted, and enclosure structures on both sides are constructed; S20, middle temporary vertical columns corresponding to road shoulders are constructed; S30, a foundation pit is excavated until the height where a top plate is located after a station is built is reached; S40, a first section of top plate is constructed, and the temporary top support is formed between the first section of top plate and the enclosure structure on the other side through construction of the concrete support; S50, the foundation pit is continuouslyexcavated, and a middle support and a bottom support are constructed; S60, longitudinal beams are constructed, and pouring construction is conducted; and S70, the other section of top plate is constructed with the concrete support serving as an inner support and connected with the first section of top plate. According to the concrete support with the temporary support being used as the permanentstructure in the cover-excavation method and the construction method of the concrete support, the temporary concrete support can be used as the permanent top support, and the problems in aspects suchas construction period delaying, resource waste and environmental protection caused by dismantling of the top plate of the temporary support can be avoided.

The invention discloses a roof tile connecting structure of a solar photovoltaic panel. The roof tile connecting structure comprises a base and a bearing. The bearing is connected with the upper part of the base, and the top part of the bearing is fixedly connected with the solar photovoltaic panel, and in addition, by adopting the bearing, the solar photovoltaic panel is capable of moving upwards and downwards with respect to the base. The roof tile connecting structure is characterized in that the base comprises a support, an adjusting base, and supporting pins, and the support is connected with the bearing disposed on the upper part of the support; the adjusting base is connected with the support, and is disposed on the lower part of the support; one end of every supporting pin is fixedly connected with the adjusting base, and the other end is inserted in the gap between the tiles of the roof, and is fixedly connected with a beam under the tiles. The roof tile connecting structure of the solar photovoltaic panel is advantageous in that the solar photovoltaic panel is fixedly connected with the tile roof, and the disassembly and the assembly are very convenient; the adjustment of the height of the solar photovoltaic panel is facilitated, and the debugging and the better use of the solar energy are facilitated; the roof tile connecting structure can be fixedly connected with various tile roofs without affecting the waterproof performance of the tile roof.

The invention discloses an extreme pressure anti-wear additive. The extreme pressure anti-wear additive is prepared from the following raw materials in parts by weight: 10-20 parts of sublimed salicylic acid, 80-100 parts of boric acid, 3-4 parts of lithium hydroxide, 4-6 parts of calcium hydroxide, 40-60 parts of potassium hydroxide, 70-90 parts of water, 120-160 parts of base oil A, and 60-80 parts of base oil B. The sublimed salicylic acid and the lithium hydroxide are adopted, the calcium hydroxide is added, it is ensured that borate can be well dispersed through a special production technology, in the application process, the adverse effects on lubricant performance are minimized, the water-resisting property and the extreme pressure anti-wear property of a product are greatly improved, and the problem that the borate is prone to sedimentation is also solved effectively. The prepared extreme pressure anti-wear additive has the extremely-high extreme pressure anti-wear property andheat stability, four-ball test PB is greater than or equal to 2000 N, PD is greater than or equal to 8000 N, and the good anti-wear extreme pressure property is still be achieved when the using temperature reaches to 250 DEG C or above.

The invention provides a replaceable device for monitoring water seepage of prefabricated assembly type subway station connectors, and belongs to the technical field of underground engineering. A water seepage monitoring device formed by combining a concrete member, water-swelling rubber and a pressure sensor is arranged on the sides, close to underground space, of splicing members. The pressure sensor is embedded into the water-swelling rubber which is embedded in a reserved groove of the concrete member, and the water-swelling rubber is not connected with the concrete member at all. The concrete member is embedded in a reserved groove of the splicing members and not connected with the splicing members at all. The replaceable device for monitoring water seepage of the prefabricated assembly type subway station connectors has the beneficial effects and advantages that waterproofness of the integral structure cannot be affected by arrangement of the device; after the connectors are subjected to water seepage, the water-swelling rubber swells, signal data of the pressure sensor changes, and effective monitoring can be conducted on the portions subjected to water seepage; the concrete member and the water-swelling rubber can be conveniently disassembled, assembled and replaced, and the operating cost of an underground structure is greatly reduced.

The invention relates discloses a windproof locking clamp device of a roof boarding, which relates to a device used for connecting the roof boarding with a T-shaped code in a roof boarding system so as to fix the roof boarding, and is particularly suitable for the roof boarding systems with larger wind loads. The windproof locking clamp device of the roof boarding comprises an aluminum-section locking clamp, a group of arc rubber gaskets and limiting devices, wherein the limiting devices are limiting clamp strips or limiting screws; the aluminum-section locking clamp consists of a locking clamp section I and a locking clamp section II; the group of rubber gaskets are respectively fixed in arc clamps at the lower parts of the locking clamp sections I and II through mounting bosses; when the locking clamp sections I and II are assembled, an aluminum-section locking clamp assembling boss in the middle of the locking clamp section II is inserted in an aluminum-section locking clamp assembling groove in the middle of the locking clamp section I; and the limiting clamp strips or the limiting screws are arranged at the upper parts of the locking clamp sections I and II and used for carrying out limiting, fixing and positioning.

The invention discloses a cable intermediate joint insulator aging diagnosis method, system and device. The method comprises the following steps: carrying out ultrasonic detection on a cable intermediate joint insulator; carrying out spectral analysis on an ultrasonic wave reflected by the cable intermediate joint insulator to obtain an ultrasonic wave velocity V and an aging degree parameter pad;and determining the aging degree of the cable intermediate joint insulator through the ultrasonic wave velocity V and the aging degree parameter pad. According to the embodiment of the invention, thereal-time monitoring of the insulation aging state of the cable intermediate joint is realized through a built-in ultrasonic probe with the transceiving function; compared with existing online monitoring modes for the temperature and partial discharge, the disclosed method enables the real-time performance of the insulating material to be represented well; the defect that in the prior art, the intrinsic performance of the insulating material in the intermediate joint of the cable joint cannot be directly represented is overcome; and the method has guiding significance in practical application.

The invention discloses a controlling cable which comprises a plurality of wires. The wires are twisted to form two sets, the outside of each set of wires is covered with an insulating layer, and the outsides of the insulating layers of the two sets of wires are together covered with a low smoke zero halogen flame retardant belt wrapping layer. An H-shaped nylon skeleton is arranged in the low smoke zero halogen flame retardant belt wrapping layer, and the H-shaped nylon skeleton is wrapped with the two sets of wires. The outside of the low smoke zero halogen flame retardant belt wrapping layer is sequentially coated with a semiconductive shielding layer, a polyester silk knitting tear-resistant layer and a jacket layer. The gap between the polyester silk knitting tear-resistant layer and the PVC jacket layer is filled with a mixture of water stopping paste and water stopping powder. According to the controlling cable, the inner structure layer is simple, various properties such as insulation, water resistance and compression resistance of the entire cable cannot be affected, mounting is convenient, and the practicability can be achieved.

The invention relates to the technical field of paper board processing, in particular to a production process for high-strength waterproof corrugated boards and application of the corrugated boards tocartons. The corrugated boards produced by the process have good waterproofness and high strength. The production process includes the steps that S1, raw paper is heated by a heater; S2, the heated raw paper is subjected to embossing treatment by utilizing corrugated rollers so as to form wavy corrugated paper; S3, modified corn starch glue is used for pasting flat corrugated paper to the wavy corrugated paper so as to obtain two-layer corrugated paper; S4, the modified corn starch glue is used for pasting two pieces of two-layer corrugated paper obtained in the step S3 so as to obtain four-layer corrugated boards; S4', the side walls of the corrugated boards are coated with the modified corn starch glue.

The invention relates to a double-wall-layer intumescent fireproof flame retardant co-microcapsule, which comprises a core material, wherein the outer layer of the core material is coated with a first layer of wall material, the outer layer of the first layer of wall material is coated with a second layer of wall material, the core material is a mixture of an intumescent fireproof flame retardant acid source, a carbon source and a gas source, and the first layer of wall material is epoxy resin; and the second layer of wall material is made of melamine-formaldehyde resin. A two-step coating method is adopted to carry out double-layer microencapsulation on an acid source ammonium polyphosphate with relatively strong hydrophilicity, a carbon source pentaerythritol completely soluble in water and melamine slightly soluble in water, so that the coating efficiency is improved, and meanwhile, the hydrophobicity is enhanced; when the material is added into the fireproof coating, the water resistance of the coating is not influenced, and meanwhile, a relatively good fireproof effect can be achieved. According to the technical scheme, the possibility is provided for preparing the water-based paint with fireproof and anti-corrosion functions at the same time.

A disclosed adhesive-adjusting special composite powder is composed of the following raw materials by weight: 2-3% of acrylamide, 1-1.5% of starch ether, 1-1.5% of xanthan gum, 8-12% of bonding adhesives powder, 10-15% of wood powder and 67-78% of alkalized sodium solonchak. The adhesive-adjusting special composite powder helps to save the usage amount of industrial flour, is a non-toxic odorless fireproof deterioration-free mildew-free green environment-friendly functional material, is formed by processing and combining an organic material and an inorganic material through a special production technology, is a novel material with a unique molecular structure and chemical characteristics, and has the characteristics of large specific surface area, more gaps, good fluidity, dispersibility, moisture retention and absorptivity, good viscosity, and low hardness. After mixed with a resin glue, the adhesive-adjusting special composite powder is good in caking property, suspension property, dispersibility, fluidity, absorptivity and thixotropy. The adhesive-adjusting special composite powder is mainly applied to building templates of melamine glue.

The invention discloses a simple-installation type RJ-45 connector. The connector comprises a middle outer shell, a male end outer shell, a fixing ring and a rubber ring, wherein the middle outer shell and the male end outer shell are fixedly installed together, the fixing ring and the rubber ring are arranged in the male end outer shell, the male end outer shell is annular, the diameter of a middle round hole of the male end outer shell is larger than the width of a crystal head, a first opening is formed in the rubber ring, one or more fixing heads are arranged at one end of the fixing ring, a second opening is formed in the fixing ring, and the rubber ring is arranged in the fixing ring. The simple-installation type RJ-45 connector can carry out cable installation easily and conveniently and can be maintained conveniently, and the waterproof performance of a whole product is not affected.

The invention discloses a GRC (glass fiber reinforced concrete) curtain wall plate capable of being provided with solar water heaters and a novel building-integrated GRC exterior wall system. The novel building-integrated GRC exterior wall system comprises the GRC wall plate, a window frame and the solar water heaters, wherein the window frame and the solar water heaters are fixedly connected with the GRC wall plate. The GRC wall plate comprises a back frame and a GRC face plate fixedly connected with the back frame. The window frame is fixedly connected with the back frame, the GRC face plate is provided with a solar water heater accommodating portion, connecting pipes are pre-buried in the solar water heater accommodating portion and are detachably connected with clamping fasteners, and the solar water heaters and the GRC face plate are fixed through clamping fasteners. The GRC curtain wall plate capable of being provided with the solar water heaters and the novel building-integrated GRC exterior wall system have the advantages that solar utilization and sun shading are integrated, so that attractiveness and functionality are integrated effectively; the solar water heaters are fixed on the GRC face plate through the pre-buried connecting pipes and the clamping fasteners, and accordingly convenience in mounting is achieved without destroying a wall, and waterproofing performance of the wall cannot be affected.

The invention discloses a glass magnesium board with a good sound insulation effect. The glass magnesium board is prepared from the following raw materials in parts by weight: 60-70 parts of high-activity magnesium oxide, 30-40 parts of magnesium chloride, 6-8 parts of alkali-resistant glass fiber cloth, 5-10 parts of plant fiber, 5-7 parts of magnesite water-resistant powder, 20-30 parts of filler and 20-30 parts of modified polyurethane. The glass magnesium board is prepared through the following steps of: material preparation; ingredient stirring; forming; and curing and edge cutting. In the process of synthesizing the glass magnesium board, the activity of the magnesium oxide has an important influence on the performance of the final glass magnesium board, so that the high-activity magnesium oxide is synthesized, and the polyurethane is subjected to graft modification by adopting organic silicon, and therefore, the obtained modified polyurethane combines the polyurethane and effective components in the glass magnesium board into a whole through a bonding effect, and sound insulation function of the glass magnesium board is enhanced while the waterproof performance and hardnessof the glass magnesium board are improved.

The invention belongs to the technical field of aluminum-based copper-clad plates, and particularly relates to an EB curing copper-clad aluminum-based plate heat dissipation coating which comprises the following components in parts by weight: 20-30 parts of acrylic resin, 10-20 parts of active monomers, 30-60 parts of phase change capsules, 0.1-0.5 part of a flatting agent, 0.1-0.5 part of a dispersing agent, 0.1-0.5 part of a defoaming agent, 5-10 parts of absolute ethyl alcohol and 10-20 parts of modified inorganic powder. According to the EB curing copper-clad aluminum substrate heat dissipation coating, the phase change capsule is added, heat dissipated by an aluminum-based copper-clad plate can be rapidly absorbed and further dissipated through the surface of the coating, and the phase change capsule is obtained by coating an organic phase change material with an organic matter and has good compatibility with a coating system; and the transparency of the coating and the original texture and texture of the material are not influenced while the heat dissipation effect is improved, excessive solvents do not need to be added, and the method is more environment-friendly.

The invention relates to a vehicle-mounted radar device housing with a waterproof, heating and drying function and a manufacturing method thereof. The vehicle-mounted radar device housing comprises ashell, a heating wire fixing plate, a heating wire and heating wire terminals; the heating wire terminals and the heating wire fixing plate are molded in an embedded manner so as to form an integratedbody; the heating wire is wound on the heating wire fixing plate and is fixedly welded to the heating wire fixing plate; the head end and tail end of the heating wire are welded and connected to theheating wire terminals respectively; the heating wire, the heating wire fixing plate and the heating wire terminals are assembled so as to form a heating wire fixing disk; and the heating wire fixingdisk and the shell are molded in an embedded manner so as to form an integrated body. According to the vehicle-mounted radar device housing provided by the invention, since the heating wire is adopted; the heating wire can be connected with an external device through the two heating wire terminals, so that a heating and drying function can be realized; and at the same time, the shell is molded inan embedded manner so as to form an integrated structure, therefore, the vehicle-mounted radar device housing has good waterproof performance.

The invention provides a post-cast strip of a basement floor and relates to the technical field of building construction. The post-cast strip of the basement floor comprises a concrete cushion, a first waterproof roll layer, a fine aggregate concrete layer and a base plate, wherein the concrete cushion, the first waterproof roll layer, the fine aggregate concrete layer and the base plate are located on the two sides of a post-cast strip area and arranged in sequence from bottom to top. A groove is formed in the portion, below the post-cast strip area, of the concrete cushion. A second waterproof roll layer is arranged between the concrete cushion and the first waterproof roll layer. The second waterproof roll layer is arranged in the groove and extends towards the two sides of the groove. Upper arches are arranged in the middle of the first waterproof roll layer and the middle of the second waterproof roll layer. Gaps are formed between the upper arches and the concrete cushion. A first yellow sand layer is arranged on the portion, located in the groove, of the first waterproof roll layer. A second yellow sand layer is arranged on the first yellow sand layer. According to the post-cast strip of the basement floor, the two middle waterproof layers and the two middle arches are adopted, the effect that the waterproof requirement is met is guaranteed through the two waterproof layers, and the gaps are reserved through the arches so that movement clearances can be reserved for rolls. Landfilling is conducted through yellow sand by two times, the waste removal work is low, and the structural safety and waterproof performance of the post-cast strip are not affected.

The invention discloses a method for improving the color fastness of a waterproof polyester-cotton fabric. The method comprises the specific process as follows: firstly, carrying out water boiling onthe waterproof polyester-cotton fabric in a dyeing vat containing a detergent 6501; then carrying out water boiling and washing in pure water; then after immediately carrying out cold water washing, adding a chlorine-resisting color fixing agent F-323 and enabling the chlorine-resisting color fixing agent F-323 to impregnate the waterproof polyester-cotton fabric; then taking out the waterproof polyester-cotton fabric from the dyeing vat and drying and roasting in sequence; finally, enabling the color fastness of the waterproof polyester-cotton fabric to be remarkably improved under the condition that the waterproof performance of the waterproof polyester-cotton fabric is not influenced. According to the method disclosed by the invention, the color fastness grade of the waterproof polyester-cotton fabric is effectively improved under the condition that the waterproof performance of the waterproof polyester-cotton fabric is not influenced and the waterproof polyester-cotton fabric has arelatively good utilization effect; the method has a simple technology and is convenient to operate, so that further popularization and application of the method are facilitated.

The invention discloses a waterproof and radiation-proof fabric. The waterproof and radiation-proof fabric is prepared from the following components in parts by weight of 10-15 parts of polythiophene with an alcohol amine group on a side chain, 45-65 parts of 2,3,5,6- tetrafluoro-terephthalyl alcohol / isocyanate-terminated polyurethane prepolymer condensation polymer, 3-5 parts of isocyanatopropyltriethoxysilane modified fluorinated graphene and 1-3 parts of triethylamine. The invention further provides a preparation method of the waterproof and radiation-proof fabric. The waterproof and radiation-proof fabric disclosed by the invention is remarkable in waterproof and radiation-proof effect, good in comprehensive performance and good in performance stability, air permeability, durability and wearing comfort.

The invention discloses a street lamp for carrying a 5G communication base station and belongs to the technical field of 5G communication equipment. The invention discloses a street lamp for carrying a 5G communication base station. The street lamp comprises a base, wherein a base is fixedly arranged on the top face of the base, annular grooves are formed in the middle of the top face of the base and the middle of the top face of the base, a shell is arranged above the base, a 5G base station mounting assembly is arranged at the position, opposite to the inner side of the shell, of the middle of the top face of the base, and a lower part of the outer wall of the shell is annular and equidistant and is provided with a plurality of through grooves, a sealing strip is embedded in the top face of the penetrating groove, baffles are arranged on the lower side in the penetrating groove, a plurality of protruding blocks are fixedly arranged on the top faces of the baffles linearly at equal intervals, blocking plates are fixedly arranged at the outer side ends of the baffles, connecting rings are fixedly arranged at the lower ends of the blocking plates, and a plurality of air inlets are annularly formed in the positions, between every two adjacent baffles, of the top face of the shell at equal intervals. The 5G communication base station body installed in the 5G communication base station can be overhauled easily, time and labor waste caused by using equipment such as an aerial ladder vehicle is avoided, and maintenance cost is saved.

The invention discloses a waterborne polyurethane coating agent. The waterborne polyurethane coating agent comprises the following components in parts by weight: 80-100 parts of a waterborne polyurethane prepolymer, 40-50 parts of small molecular spirulina peptide, 30-50 parts of deionized water and 3-5 parts of hyperbranched cationic polyacrylamide. The waterborne polyurethane coating agent has the advantages of high hydrophobicity, yellowing resistance and the like, and a preparation technology is simple and easy to operate.

The invention discloses a water swelling type water-blocking belt. The water-blocking belt includes a matrix layer, a water-absorbing layer and a protective layer; the inner wall of the matrix layer is in contact with the external of an optical cable or a cable; the bottom of the water-absorbing layer is connected to the outer wall of the matrix layer; the protective layer externally wraps the part, other than the junction part of the water-absorbing layer and the matrix layer, on the water-absorbing layer; the bottom of the protective layer covers the junction part of the water-absorbing layer and the matrix layer; the water-absorbing layer contains a superabsorbent expansion material; the protective layer is a thin film which can be dissolved after absorbing water; a bonding layer can bearranged between the matrix layer and the water-absorbing layer; and the matrix layer is preferred to be metal. The water-blocking belt is strong in water absorbing and blocking performance, less inlayer, simple and light in structure, high in water swelling multiple, high in water-absorbing efficiency and good in water blocking performance; influences on the using of the optical cables or the cables cannot be caused; and the water-blocking belt has advantages of shielding signals and preventing rats from biting.