170results about How to "High water pressure resistance" patented technology

The invention relates to waterproof moisture permeation polyurethane paint used for textiles and a preparation method. The waterproof moisture permeation polyurethane paint is prepared from methyl diphenylene diisocyanate, toluene di-isocyanate, polyether glycol (with the molecular weight of 2000), linear dihydroxylated alkylsiloxane (with the molecular weight of 1000), polyester dihydric alcohol (with the molecular weight of 2000), trimethylolpropane, chain extending agents, sealing compounds, dibutyl tin laurate and solvents through the processes of pre-polymerization reaction, chain extension reaction and sealing reaction. The production process is simple, and the products have the advantages of self-crosslinking effect, soft hand feeling, good cold resistance performance, high moisture permeation performance, high water pressure resistance and little reduction after water pressure resistance washing.

The invention relates to a waterproof and moisture-permeable coating agent composition, wherein, a certain amount of microporous lignocellulose fine powder is added into the coating agent with waterproof function, so that the coating agent has moisture permeable performance. The waterproof and moisture-permeable coating agent composition which is used as the coating agent for non-woven fabric, knitted fabric or woven fabric can be made into coated fabric and synthetic leather with waterproof and moisture permeable performances. Compared with the prior at, the invention has the advantages that: 1. the raw material is easy to be added, the process is available with high adaptability, no need to add new equipment; 2. on the premise that the waterproof performance is not decreased, the amount of moisture permeated is increased obviously and the anti-adhesion is improved; 3. the coated fabric and superfine fiber and artificial cover synthetic leather made by the invention has the advantages of fine moisture permeability, high resistance to water pressure and that the physical performance does not decrease.

The invention provides a preparing method of an environment-friendly solvent-type electrostatic spinning waterproof and moisture-permeable membrane. The preparing method is characterized by comprisingthe steps of 1, preparing a high-molecular polymer solution with water or environment-friendly alcohols being solvents, adding a corresponding water-soluble or alcohol-soluble water repelling agent and cross-linking agent, and preparing a hydrophobic fiber membrane through an electrostatic spinning technology; 2, conducting aftertreatment on the fiber membrane to trigger a chemical crosslinking reaction between a polymer matrix and the cross-linking agent, reinforcing the water resistance of the fiber membrane and regulating the pore structure of the fiber membrane to obtain the environment-friendly solvent-type electrostatic spinning waterproof and moisture-permeable membrane. In the production process, no waste gas, waste water and solid waste are generated, the environment cannot be damaged, the prepared waterproof and moisture-permeable membrane does not contain toxic solvents, and in the actual application, the healthy of a wearer cannot be damaged; the resistance to water pressure of the fiber-based waterproof and moisture-permeable membrane is larger than or equal to 150 kPa, the moisture permeability is larger than or equal to 15,000 g/m<2>/d, the tensile breaking strengthis larger than or equal to 30 MPa, and the environment-friendly solvent-type electrostatic spinning waterproof and moisture-permeable membrane has a large application prospect in the field of functional protective clothes.

Disclosed is a water-proof and dust-proof membrane assembly and applications thereof. The water-proof and dust-proof membrane assembly comprises a body and a supporting member. The body is of membrane and has a first surface, a second surface, and an asymmetric porous structure formed between the first surface and the second surface of the body. The asymmetric porous structure has a thickness ranging between 1 μm and 1000 μm, a first volumetric porosity ranging between 5% and 99%. The asymmetric porous structure has plural pores, and each pore has a pore diameter between 0.01 μm and 15 μm. The supporting member is of a polymeric material and has a first contacting surface, a second contacting surface, and a second volumetric porosity which is greater than the first volumetric porosity. The first contacting surface of the supporting member is adhered to the first surface of the body.

A polyethylene nonwoven fabric is produced by the meltblowing process using a resin composition comprising a polyethylene (A) and a polyethylene wax (B). The fabric is made up with fine fibers having a small fiber diameter and good formation. A nonwoven fabric laminate containing at least one layer comprising the polyethylene nonwoven fabric is excellent in softness, water impermeability and interlaminar bond properties. In particular, the laminate of a meltblown nonwoven fabric comprising the polyethylene nonwoven fabric and a spunbonded nonwoven fabric made up with a conjugate fiber comprising a propylene-based polymer (a) and an ethylene-based polymer (b) provides good uniformity and excellent softness, gas permeability, water impermeability and interlaminar bond strength. The laminate is advantageously used as substrate materials for sanitary goods such as disposable diapers and for packaging materials.

The invention relates to an optical cable connector, and provides an underwater optical cable connector, which is capable of meeting requirements on water tightness and tensile performance, and providing detachable and movable connection. The underwater optical cable connector is characterized in that mutually matched cone structures are arranged on a plug shell and a socket shell respectively sothat the plug shell and the socket shell can be in gapless sealing connection by means of insertion, a sealing connection structure is arranged between a plug and an optical cable, the space between the plug shell and a tensile taper sleeve is sealed by an 'O'-shaped sealing ring, and a sealing tail sleeve for sealing is formed in the space between the optical cable and a tail part of the whole plug by mean of integral die casting. The movable sealing connection structure is arranged between the plug and a socket of the underwater optical cable connector, the two shells are connected by cones, no gap is reserved between the inner cone and the outer cone, the space between the cones is sealed by the 'O'-shaped sealing ring, the inner cone and the outer cone are locked by a connecting nut, and the underwater optical cable connector is simple in structure, reliable in performance, extremely high in water pressure resistance and convenient in connection and detachment.

The invention discloses a coating fabric with high water pressure resistance and high moisture penetrability, which comprises a bearing layer, a waterproof layer coated on the bearing layer, a micropore layer coated on the waterproof layer and a protective layer coated on the micropore layer, wherein the protective layer is a wear-resistant coating with a micropore structure and is a hydrophilic waterproof and penetrable polyurethane coating with a hydrophilic function; the micropore layer in the middle is a micropore waterproof and penetrable polyurethane coating with a micropore structure; and the bottom layer of the fabric coating is a waterproof layer which has favorable film formation property and can provide a hydrophilic waterproof and penetrable polyurethane coating with high water pressure resistance. The fabric provided by the invention has the characteristics of higher water pressure resistance, high penetrability and wearing comfortability.

The invention discloses a bionic robotic dolphin for water quality monitoring. The bionic robotic dolphin comprises a bionic robotic dolphin body and an upper computer monitoring system. Information interaction between the bionic robotic dolphin body and the upper computer monitoring system is achieved in a radio frequency mode. According to the bionic robotic dolphin body, killer whale spindle low-resistance streamline appearance is adopted, a pressure-resistance shell is manufactured with polyformaldehyde engineering plastic, and the bionic robotic dolphin body comprises a water quality sensor module, a transparent head cabin, a pectoral fin cabin, a master control cabin and a tail joint cabin. The water quality sensor module is provided with different types of water quality sensors according to water quality monitoring requirements. A pectoral fin driving module is mounted in the pectoral fin cabin. The master control cabin is provided with a dorsal fin driving module and a tail joint driving module. The tail joint cabin is provided with a tail fin driving module. Maneuvering motions of advancing, steering, diving, floating and the like of the bionic robotic dolphin body can be achieved. By utilizing high maneuvering, low disturbance, non-pollution and the like of the bionic robotic dolphin body, water quality monitoring tasks are completed in narrow, complex and dynamic underwater environments by carrying the water quality sensors.

The invention relates to a method for implementing super-hydrophobic modification on a polypropylene hollow fiber membrane material, in particular to a method for preparing a lasting super-hydrophobic modified polypropylene hollow fiber membrane. The method comprises the following steps of: respectively dissolving fluorine ester containing unsaturated double bonds, acrylate containing a long alkyl chain, dithiol and a photo-initiator into an acetone solution to prepare a modification solution, soaking a polypropylene membrane treated by normal pressure plasmas into the modification solution, performing ultraviolet irradiation, washing, airing, and thus obtaining a fluorine-containing and long alkyl chain grafted modified polypropylene membrane material. A uniform, lasting and stable super-hydrophobic layer containing fluothane and the long alkyl chain is formed on the surface of the polypropylene membrane material, so that the hydrophobic polymer membrane is endowed with excellent super-hydrophobic property, high water pressure resistance and high air permeability; and the method is simple, good in treatment effect and low in cost, does not produce environment pollution, and is efficient and energy-saving.

The invention relates to a polyfluortetraethylene nanofibre membrane and a preparation method thereof. The aperture distribution of the polyfluortetraethylene nanofibre membrane is concentrated within a range of +/-100 nanometers and occupies more than 90 percent of the total volume of each level aperture; the stretching process of the preparation method adopts low-temperature segmenting stretching, thus the stretching temperature is stable, the polyfluortetraethylene nanofibre membrane is uniformly heated, and giant molecule segmers are equally unfolded; the produced polyfluortetraethylene nanofibre membrane has concentrated aperture distribution and high uniformity so as to generate high water pressure resistance, long water resistant time and high membrane fibering degree, and the obstructing efficiency of bacteria reaches more than 99.99 percent, thereby the polyfluortetraethylene nanofibre membrane can meet the requirement of oil-water separation and high-end gas filtration of an operation isolation mattress with high-pressure steam filtration and high water pressure resistance and can be used in fields of superclean room entering air filtration, and the like, such as medical treatment and health protection, health matter cultivation, semiconductor devices, integrated circuit, medicine, and the like.

The invention relates to an electrostatic spinning method and device of a fiber-based waterproof moisture-permeable film high in moisture-permeable flux. The electrostatic spinning method includes that during electrostatic spinning, polymer solution jet flow is injected at a certain included angle with air of a certain temperature and/or lateral air flow of non-solvent steam, and polymer molecules in the jet flow are quickened to be separated and solidified into fibers; water-pressure resistance of the electrostatic spinning film, namely the fiber-based waterproof moisture-permeable film high in moisture-permeable flux is greater than or equal to 100kPa, and the moisture-permeable flux is greater than or equal to 15000g/m<2>/d. The electrostatic spinning device is composed of an electrostatic spinning box, a high-voltage direct-current power supply, an electrostatic spinning hydraulic system, a spinning jet and a receiving base material, and a steam generation and air supply system is mounted on one side of the electrostatic spinning box. The fiber-based waterproof moisture-permeable film produced by the method has the advantages of small bore diameter, controllable adhesion degree and high porosity; the film is high in water-pressure resistance and moisture-permeable flux when used in the waterproof and moisture-permeable areas, and is wide in actual application prospect.

The invention discloses a superfine fiber high-density fabric and a production method thereof. Warp yarns and weft yarns consist of superfine fiber yarns completely, and the cover coefficient of the finished product is over 2,600. The production method comprises that: the warp yarns and the weft yarns adopt the superfine fiber yarns having a precursor filament number or fiber-opened filament number of below 1.10 D for weaving, and a gray fabric is prepared. The fabric has the advantages of plump and soft handfeel, certain body, excellent mouldability, and comfort. The fabric also has water pressure resistance of 600 mm H2O after washing for 20 times, has excellent windproof and anti-acarien function, and is an ideal material for sports and casual wear.

The invention discloses a micro porous dry-method waterproof and moisture-permeable fabric and a production method thereof. The fabric can be used for outdoor functional sportswear, brand readymade clothes, jackets, sport shoes, bedding and the like. The production method comprises the following steps of: uniformly coating a moisture-permeable fabric and a waterproof backing material on release paper in sequence; giving grains by rolling compound base fabrics through a transfer method; and volatilizing non-solvents and solvents in the fabric and the backing material at different degrees by baking with an oven at different degrees to make the fabric have the waterproof and moisture-permeable functions. The fabric produced by the method overcomes the defect of poor water-resisting property because the conventional hydrophilic imporous thin film fabric swells when wet, has good moisture permeability and hydraulic pressure performance and widens applied range of the waterproof and moisture-permeable fabric.

The present invention relates to an ultra-high-flux nano-fiber waterproof gas-permeable membrane and a preparation method thereof, and belongs to the field of textile technology material synthesis. The ultra-high-flux nano-fiber waterproof gas-permeable membrane is prepared from the following two components such as bifunctional group-modified nano-silica particles and a polymer nano-fiber membrane, wherein the nano-fiber membrane uses the bifunctional group-modified nano-silica particles as the adhesive between fibers, such that the rub resistance of the membrane material can be enhanced, the nano-fiber surface roughness can be increased, and the water resistance of the fiber membrane can be increased. According to the present invention, the prepared ultra-high-flux nano-fiber waterproof gas-permeable membrane has characteristics of small pore size, high porosity and enhanced adhesion structure, can provide advantages of high water resistance, high moisture permeable flux and high strength in the waterproof and moisture permeation field, has the moisture permeation flux of more than or equal to 18000 g/m<2>/d, has the water resistance of more than or equal to 100 kPa, and has wide practical application prospects.

The invention provides water-based dry method foaming raincoat leather and a preparation method thereof. A water-based thickening agent, a defoaming agent, a flatting agent and other preparations are added into waterborne polyurethane resin, slurry on the surface layer, the middle layer, and the foaming layer and the bottom layer of waterborne polyurethane resin slurry is prepared through mixing and vacuum defoaming; through a dry method film moving processing method, release paper is firstly coated with the surface layer, the surface layer is coated with the middle layer after being dried and cooled, the middle layer is coated with the foaming layer after being dried and cooled, and the foaming layer is coated with the bottom layer after being dried and cooled; after low-temperature drying, base cloth is attached at high temperature, drying, curing and cooling are carried out, the release paper is stripped, split rolling and surface aftertreatment are carried out, and the water-based dry method foaming raincoat is obtained. The obtained water-based dry method foaming raincoat has good washing and water pressure resistance, and the water pressure resistance is still 10,000 MPa or above after washing; the water-based dry method foaming raincoat leather is soft in hand feeling, resistant to wrinkles, high in real leather sense, good in breathability and high in washing and water pressure resistance and completely meets the needs of the market for raincoat leather.

The invention discloses a preparation method of a polyacrylate-modified polyurethane aqueous coating emulsion with high water pressure resistance which is used for textile. The emulsion is prepared from isophorone diisocyanate, bis(hydroxymethyl) butyric acid, polybutadiene diol, neopentyl glycol, isophorone diamine, triethylamine, deionized water, styrene, butyl acrylate, hydroxyethyl methacrylate and initiator. The preparation method is simple and convenient, the solid content is 45%, and the prepared emulsion has the advantages of soft handfeel, good cold resistance, solvent resistance andfirmness, high water pressure resistance and aqueous environmental-friendliness.

The invention discloses an underground coal mine water hole prevention and control high-water-pressure water jacking directional drilling tool and drilling method. The directional drilling tool comprises a drill string body and a directional drill bit which are connected in sequence, and an inner annular hollow flow channel is arranged around the external of the drill string body; a ''Y-type'' structure flush fluid circulation flow channel consisting of a central flow channel and the inner annular hollow flow channel and an outer annular hollow flow channel formed between the drilling tool anda bore wall, the flush liquid is always flowing in the ''low back pressure'' state, the ''reactive'' load of a mud pump is substantially reduced, the effective utilization rate of the hydraulic energy can be improved by 15% or above, and it is ensured that the normal working and output torque parameters of the hole bottom power drilling tool do not change significantly under the working conditionof large water inrush of the high water pressure formation towards the inside of a hole. The drilling tool can normally directionally drill in the formation water outlet pressure condition of 6.0MPaor above, so that the downhole directional drilling water pressure resistance is improved by 50% or above, and the water jacking directional drilling hole-forming depth is 500m or above.

The invention discloses a water-based polyurethane dispersoid for a dry coating primer as well as a preparation method and application thereof. The polyurethane is obtained by polymerizing the following raw materials: a) at least one diisocyanate; b) at least one polyether glycol and/or polyester glycol; c) at least one polyether or polyester polyol with functionality degree more than or equal to3; d) at least one micromolecular polyol chain extender containing active hydrogen; e) at least one carboxylic acid hydrophilic chain extender containing active hydrogen; f) at least one polyamine micromolecular chain extender containing active hydrogen; and g) at least one organosilicone polyol containing active hydrogen, wherein the molecule side chain contains organosilicone. The water-based polyurethane dispersoid for the dry coating primer can achieve good anti-adhesion effect on the premise of guaranteeing soft hand feeling of resin.

The invention provides a fabric super-hydrophobic surface preparation method. The method at least includes steps: well mixing polydimethylsiloxane, hydroxyl polydimethylsiloxane, polymethylhydrosiloxane and a cross-linking agent to obtain polysiloxane finishing liquid; coating the fabric surface with the polysiloxane finishing liquid, and uniformly spreading a layer of sodium chloride particles onthe fabric surface to obtain a deposited coating; curing the deposited coating, subjecting the cured fabric to water-bath ultrasonic treatment, and drying to form the fabric super-hydrophobic surface. A super-hydrophobic fabric prepared according to the method is excellent in chemical stability and mechanical durability and has great water pressure resistance and breathability, a static contact angle of the super-hydrophobic surface reaches 155.47 degrees, a rolling angle is 5.5 degrees, breathability reaches 90.06mm/s, water pressure resistance reaches 2733Pa, and hydrophobicity of the fabric is almost unchanged after repeated washing and wear.

The invention discloses an automatic cleaning system for a video capture window of an underwater monitoring device. The automatic cleaning system comprises a disc-shaped base, a video capture module and a transparent window cover. The outer surface of the window cover is a rotation curved surface which is formed in the manner that a busbar with one end on the center axis rotates around the center axis by a circle. The center axis of the window cover is coaxial with the center axis of the base. A cleaning scraper is arranged on the outer wall of the window cover in a striding manner. The inner edge of the cleaning scraper is attached to the outer surface of the window cover in a matched manner. The cleaning scraper is hinged to the window cover and can rotate around a hinge shaft. The part, between the cleaning scraper and the window cover, of the hinge shaft is coaxial with the center axis of the window cover. The cleaning scraper is driven by external force to rotate around the hinge shaft.

The invention discloses polyurethane resin for synthetic leather with high water pressure resistance. The polyurethane resin is mainly prepared from the following raw materials in parts by weight: 80-120 parts of polyester glycol, 80-120 parts of polyether glycol, 5-15 parts of glycol, 65-80 parts of diisocyanate, 600-700 parts of solvent, 0.01-0.05 part of catalyst and 0.1-0.5 part of terminator. By adopting the technical scheme, the prepared polyurethane resin disclosed by the invention has excellent water pressure resistance and has the characteristics of water resistance, hydrolysis resistance and the like; the synthetic leather prepared in a manner that the polyurethane resin is adopted as a surface layer has excellent water resistance and weatherability.

The invention discloses a lead-free bronze alloy and an application thereof. The lead-free bronze alloy comprises the following chemical components by mass percent: 2.3-4.3 percent of stannum, 5.0-10.0 percent of zinc, 0.6-1.7 percent of bismuth, 0.002-0.02 percent of misch metal, equal to or less than 0.05 percent of lead, equal to or less than 0.25 percent of iron, equal to or less than 1.0 percent of nickel, equal to or less than 0.03 percent of phosphor, equal to or less than 0.002 percent of silicon, equal to or less than 0.002 percent of aluminum and the balance of copper, wherein the misch metal contains 80-90 percent of lanthanum, 5-8 percent of cerium, 4-10 percent of praseodymium and equal to or less than 1.0 percent of neodymium by mass percent. The alloy basically contains no lead, is harmless to human bodies and environments, is easily cut and suitable for low pressure casting and gravity casting, and has good erosion resistance; and the bronze alloy is suitable for casts of a drinking water system.

The waterproof sound-transmissive cover is characterized by providing a frequency response curve with a difference between a maximum sound pressure level and a minimum sound pressure level of 13.0 dB or less in the range of frequencies from 3 kHz to 8 kHz, and an insertion loss at 1 kHz of less than 14.0 dB, and said cover comprising: a porous film having (1) a water pressure resistance measured according to JIS L1092 water penetration test method B (high pressure method) of 20 kPa or more, and air permeability measured according to JIS L1096 method A (Frazier type method) of 3.0 cc/cm²·sec or more, and (2) a tensile strength measured according to ASTM standards D412 of 5.5N or more.

The invention discloses a preparation method for a highly water-pressure-resistant, highly air permeable and highly wet permeable garment film. The preparation method comprises the following steps of: mixing dispersed polytetrafluoroethylene resin powder with a solvent and a surfactant in a certain mass ratio; and performing maturing, blank-making, extrusion molding, calendering, one-time drawing, desolventizing, intermediate-temperature secondary longitudinal drawing, low-temperature secondary transverse drawing, high-temperature thermal treatment and sizing and the like. The method is simple in batch production process, and controllable and environmental-friendly in production process, quality is stable and appearance is good. The film has the characteristics of being highly water-pressure-resistant, great in air and wet permeability, washable, stable in chemical property and the like. The film is particularly suitable for the field of outdoor waterproofness, air permeable and wet permeable garments, shoes, military uniforms and the like.