44results about How to "Improve waterproof and breathable" patented technology

The invention discloses a soft wet-method waterproof air-permeable water-permeable polyurethane resin and a preparation method thereof. The resin comprises the following components in percentage by mass: 12% to 15% of poly adipic acid-1, 4-butanediol ester glycol, 7% to 9% of diphenyl-methane-diisocyanate MDI, 1% to 2% of a mixing chain extendor, 0.5% to 0.6% of a terminating agent, 0.3% to 0.5% of a high-speed penetrating agent OT, 0.02% to 0.04% of a catalyst, 0.3% to 0.5% of filling material, 0.1% to 0.2% of a stabilizer UV-329, and the balance of an organic solvent. As the polyurethane resin and the preparation method thereof adopt the mixing chain extendor, and measures such as adding an organic solvent DMF and the filling material CMC twice, the prepared polyurethane resin has excellent waterproof moisture permeable properties ( water-fast pressure larger than and equal to 3000 mm H2O, and moisture permeable property larger than and equal to 5000 g/m 2.24 Hr), and is good in rebound resilience and peel strength, high in water-fast pressure, and soft, plump, and fine and smooth in handfeel.

The invention discloses a waterproof and breathable non-woven fabric and a production process thereof. The waterproof and breathable non-woven fabric comprises the following raw materials in parts byweight: 50-70 parts of polypropylene, 5-10 parts of polyester resin, 3-5 parts of an additive, 5-10 parts of a flame retardant, and 3-5 parts of a dyeing agent. In the invention, the production process of the waterproof and breathable non-woven fabric is strictly controlled, by strictly controlling the proportion of all components of the waterproof and breathable non-woven fabric and production process parameters, and by adding the flame retardant to the raw material additive, the flame retardant performance of the produced non-woven fabric is improved, the additional sodium thiosulfate can improve the light resistance of the fabric, meanwhile heat degradation masterbatch and a softener can effectively improve the softness of the fabric and enhance the comfortableness. Meanwhile, under thecontinuous conveying of a web forming conveyor belt, a PE polymer gas-permeable membrane is added to improve the waterproof and breathable performance of the non-woven fabric, so that the non-woven fabric is suitable for extensive promotion.

The invention discloses a preparation method of a waterproof and breathable nanofiber membrane. The preparation method comprises the following step of A, preparing a basement membrane: smashing thermoplastic polyurethane, polymeric nanofibers, graphene, polyethylene, hydroxyethyl cellulose, nanometer titania and nanosilicon dioxide particles, and feeding into a smelting furnace. According to the preparation method of the waterproof and breathable nanofiber membrane provided by the invention, the basement membrane is firstly prepared, a layer of hydrophilic membrane is injected on the surface of the basement membrane, a hydrophobic membrane is injected on the bottom face of the basement membrane, and a coiled thin membrane is finally obtained through extruding, drying, winding and cutting,so that the waterproof and breathable performances of the overall thin membrane can be effectively improved; and in addition, the basement membrane adopts the thermoplastic polyurethane, the nanometertitania, the nanosilicon dioxide particles, the graphene and the like as raw materials, so that the toughness, antibacterial effect, ultraviolet-resistance and strength of the overall thin membrane can be effectively improved, the application range and the service life of the overall thin membrane are improved, the market competitiveness is improved, and the method is in line with the interests of the enterprise.

The invention discloses a polyurethane self-adhesive film waterproof roll as well as a preparation method and application thereof. The polyurethane self-adhesive film waterproof roll sequentially comprises an epoxy modified polyurethane film, a self-adhesive layer and a protective liner from top to bottom, the preparation method of the epoxy modified polyurethane film comprises the following steps: dispersing 10-15 parts by mass of a reactive flame retardant in 20-30 parts by mass of tetrahydrofuran, uniformly mixing with 40-60 parts by mass of a polyurethane prepolymer, 15-20 parts by mass of epoxy acrylate and 5-10 parts by mass of fluorinated epoxy resin, heating to 50-55 DEG C, carrying out pre-reaction for 0.5-1 hour, heating to 70-80 DEG C, adding 1-2 parts by mass of bis (dimethylaminoethyl) ether, carrying out heat preservation and stirring reaction for 3-6 hours, and cooling to room temperature to obtain the epoxy modified polyurethane film. Pouring the mixture into a mold, carrying out hot-pressing curing for 1-3 hours at 90-110 DEG C, heating to 130-150 DEG C, and continuing hot-pressing curing for 0.5-1 hour, so as to obtain the epoxy modified polyurethane film. The thermal decomposition temperature of the prepared epoxy modified polyurethane film reaches 300 DEG C or above, and the epoxy modified polyurethane film can be used for a long time in a high-temperature environment of 150 DEG C and has high tension, high tensile force, water resistance, air permeability, obdurability, aging resistance, cold resistance and chemical corrosion resistance.

The invention discloses a preparation process of a 3D pattern anti-leakage high-breathability film. The preparation process comprises the steps of material selection, material blending, moisture absorption and drying, shearing and mulling, melt extrusion, chilling and sheet casting, online thickness measurement, multi-stage stretching, 3D cooling and embossing, corona surface roughening treatment, rolling and product slitting. A material comprises breathable particles with constant deformation performance, breathable particles with a good tensile property, high-strength polyethylene, polyimide resin, epoxy resin, high-strength and puncture-resistant breathable particles containing nanoscale calcium carbonate and antistatic particles. The 3D embossing steel roller with a special effect is manufactured by arranging the 3D embossing steel roller and the specific rubber compression roller and utilizing the principle that light rays refract different patterns at different angles, a specific engraving process is verified and developed, and an applicable manufacturing process is formulated in cooperation with pattern requirements, so that a product can better highlight the 3D effect after being formed, and is more attractive to consumers.

The invention discloses a production process of a novel window roller shutter cloth material with heat insulation, shading and noise reduction functions. The production process comprises the following steps: A, performing shaping treatment on cloth to be manufactured on a shaping machine at the temperature of 150-180 DEG C; b, calendering the cloth; c, whitewashing the cloth; d, the composite TPU shading black film is attached to the cloth through a PUR hot melt adhesive or a PU adhesive; e, the composite PET aluminum laminated film is attached to the composite TPU shading black film through a PUR hot melt adhesive or a PU adhesive; f, printing colors; and G, performing high-temperature embossing operation on the cloth obtained in the step F by using an embossing machine. The shading black film is attached to the fabric, so that the waterproof and breathable performance of the fabric can be improved, and the effects of preserving heat and moisture and resisting strong sunlight and infrared irradiation can be achieved; the light barrier property, the moisture resistance, the heat resistance and the puncture resistance of the cloth can be improved by attaching the composite PET aluminum laminated film; the density of the cloth can be reduced through the multiple layers of covering films, and finally the effect of reducing noise is achieved.

The invention discloses a waterproof breathable spray head which comprises a spray head main body, a breathable film and a fixing part. A center hole and an internal thread hole are formed in the spray head main body from the center of one end to the center of the other end in a communicating mode, the inner diameter of the internal thread hole is larger than that of the center hole, the outer surface of the spray head main body is sequentially provided with a connection section, a transition section and a first external thread section from one end to the other end, the outer contour size of the transition section is larger than that of the connection section and the first external thread section, and the breathable film is installed on the internal thread hole in the spray head main bodythrough the fixing part. The waterproof breathable spray head is convenient to assemble and disassemble, flexible to install and high in protection grade and has the efficient water and dust prevention function.

The invention discloses a comfortable high-breathability composite material which comprises a soft cotton layer, a melt-blown layer and a carrier layer. According to a preparation method of the composite material, polypropylene master batch is extracted, heating, melting and molding are conducted, the molded raw material is extruded into filaments, hot-air stretching is conducted, a non-woven fabric is taken as the carrier layer and is glued, the stretched raw material is sprayed on the carrier layer, supporting net cooling is conducted, the raw material is cooled into the melt-blown layer, the melt-blown layer is covered with the soft cotton layer, then pressing is conducted together, and finally rolling, slitting and packaging are conducted. The moisture permeability of the formed composite material can reach 4000 g/m/4 hr, the water pressure resistance can reach 30 mbar or above, and the formed composite material has the advantages of being high in waterproofness, breathability, light and softness. The composite material is suitable as a base film composition material of disposable hygienic products such as protective clothing, diapers, sanitary towels, breast pads and the like.

The invention discloses a high-rise modular building and a construction method thereof, comprising several layer module units, the layer module units include several steel columns, main beams, and a modular box body, the modular box body includes wall modules, box body let The column module, the bottom surface module and the top surface module, the bottom surface module and the top surface module are respectively fixedly connected with the wall module and the box letting column module, the box letting column module corresponds to the position of the steel column, and the outside of the steel column is provided with a sealing plate, The sealing plate and the steel column are fixed, and the sealing plate and the box allow the column module to enclose the steel column. The high-rise modular building disclosed by the present invention is constructed by using steel columns, main beams and modular boxes directly processed in the factory. The construction method is simple, the installation process is simple, and a temporary connecting beam is built between the steel columns to improve the safety of the installation process.