13912results about "Non-woven fabrics" patented technology

Sanitary tissue products of the present disclosure may comprise at least about 70% short fibers and / or having a weight weighted mean fiber length of less than about 1.4, and may have one or a combination of premium performance parameter(s). One or more of said sanitary tissue products may form part of an array of sanitary tissue products.

A graphene-infused fabric is provided as a sound reducing acoustic layer for object such as a pickleball paddle. The graphene-infused fabric is made from polymer fibers, at least one of which is a graphene-infused polymer fiber. Graphene is blended into a polymer material, and fibers are manufactured from said material such as by extrusion. The graphene-infused polymer is combined with other fibers to be made into a woven or non-woven fabric.

The invention provides a composite nanofiber membrane applied to detection of a C4F7N gas decomposition component C3F6, a preparation method of the composite nanofiber membrane and a sensing device. The composite nanofiber membrane comprises a polymer nanofiber substrate and a metal organic framework dispersed in the polymer nanofiber substrate, the metal organic framework is MIL-101 (M), and M represents a metal element and comprises at least one of Cr, Cu and lanthanide series metal elements; the surface of the interdigital electrode is coated with the composite nanofiber membrane, and the composite nanofiber membrane serves as a sensing device and is used for detecting C3F6 gas. The sensor disclosed by the embodiment of the invention can generate response within 25s, still has certain sensitivity (which is 3% or above) to 10ppm of C3F6 gas, and meets the requirements on high sensitivity and quick response in detection of a C4F7N gas decomposition product C3F6.

Sanitary tissue products of the present disclosure may comprise at least about 70% short fibers and / or having a weight weighted mean fiber length of less than about 1.4, and may have one or a combination of premium performance parameter(s). One or more of said sanitary tissue products may form part of an array of sanitary tissue products.

The invention discloses a hydrophobic-hydrophilic Janus water collecting film and an efficient preparation method thereof, and belongs to the field of water collecting materials. An electrostatic spinning process is adopted, and a hydrophobic polymer is accurately deposited on the surface of a hydrophilic substrate in the form of a nanofiber array, so that the Janus composite membrane with an asymmetric wetting gradient structure is successfully constructed. The unique double-sided wettability difference drives the liquid drops to realize directional transmission, and the core mechanism of the liquid drops is derived from capillary force regulation and control caused by interfacial wetting potential energy difference. The Janus membrane shows excellent performance in the aspect of air moisture trapping, the ultra-fast moisture absorption characteristic and the surface regeneration capacity are achieved, and compared with a traditional single-layer hydrophilic membrane, the water collecting efficiency is remarkably improved by 110%. A one-step forming process is adopted for preparation, the diameter of the nanofibers is controllable, complex post-treatment procedures are not needed, and energy consumption required by equipment is low. The high-performance water collecting film has important application value in the fields of atmospheric water taking in arid regions, dehumidification of precise instruments and the like.

The invention belongs to the technical field of composite fiber materials, and relates to a functional thermal management fabric, in particular to a phase change microcapsule doped flexible cooling fiber fabric and a preparation method thereof. The fabric has a controllable double-layer structure and is formed by assembling nanofibers and micro-nanofibers doped with a large number of phase change microcapsules. Wherein the micro-nano fiber layer has relatively high sunlight reflectivity and atmospheric window wave band emissivity, and shows an excellent radiation cooling effect; the microcapsule content of the nanofiber layer doped with a large amount of phase change microcapsules is not less than 10 wt%, and the nanofiber layer has no rupture phenomenon, has high heat storage capacity, not only makes up for the deficiency of radiation cooling capacity, but also effectively slows down temperature fluctuation. The radiation cooling technology and the phase change latent heat technology are combined, so that the long-time temperature control performance of the fabric is realized, and the thermal shock resistance is enhanced. In addition, the fabric also has excellent mechanical property, flexibility, washability, air permeability, moisture penetrability and sunscreen property.

The invention belongs to the technical field of biomedical engineering, and particularly relates to a biological rotator cuff patch with a double-gradient structure and a preparation method of the biological rotator cuff patch. The preparation method comprises the following steps: carrying out electrostatic spinning on a spinning solution, controlling the rotating speed of a receiving roller to increase at a constant speed in the electrostatic spinning process, and obtaining a nanofiber membrane after electrostatic spinning; l-polylactic acid and D-polylactic acid are simultaneously dissolved in the spinning solution; the minimum value of the rotating speed of the receiving roller is 100-500 rpm, and the maximum value of the rotating speed of the receiving roller is 3000-4000 rpm. The finally prepared biological rotator cuff patch with the double-gradient structure presents an orientation degree gradient and a piezoelectric effect gradient at the same time on the thickness scale, and has mechanical supporting capacity and biocompatibility, and bionic healing promotion of the patch with the gradient structure is achieved.

The invention discloses a preparation method of an ultrahigh-reflectivity radiation refrigeration fiber membrane, which comprises the following steps: dissolving a polymer in an organic solvent to prepare an electrostatic spinning precursor solution, and adjusting parameters such as the concentration of the electrostatic spinning precursor solution, spinning voltage, spinning distance, roller rotating speed, liquid supply rate, slide rail reciprocating rate and the like to prepare the ultrahigh-reflectivity radiation refrigeration fiber membrane. And preparing the ultrahigh-reflectivity radiation refrigeration fiber membrane with a porous structure, wherein the reflectivity of the ultrahigh-reflectivity radiation refrigeration fiber membrane is greater than 95% at the sunlight wave band of 0.3-2.5 microns. In the dissolving process of the polymer in the organic solvent, the water bath stirring temperature is 20-60 DEG C, the stirring time is 3-6 hours, a bilateral multi-nozzle opposite layout is adopted in electrostatic spinning, the spinning distance is 15-30 cm, the electrostatic spinning voltage is 20-50 kV, the rotating speed of a roller is 400-1000 r / min, the spinning liquid supply rate is 8-30 ml / h, the reciprocating rate of a sliding rail is 3-10 mm / s, and the thickness of the ultrahigh-reflectivity radiation refrigeration fiber membrane is 300-500 microns. The radiation refrigeration film prepared through the method can be prepared in batches, has good flexibility and can be widely applied to the fields of clothes, buildings, equipment and the like.

The invention provides a Janus polylactic acid fiber membrane for cooling and a preparation method of the Janus polylactic acid fiber membrane. The method comprises the following steps: S1, synthesizing silicon dioxide nanoparticles; s2, dissolving silicon dioxide nanoparticles, a surfactant and polylactic acid in an organic solvent to obtain an electrostatic spinning solution A; s3, uniformly dissolving polylactic acid to obtain an electrostatic spinning solution B; s4, preparing an inner layer of the Janus fiber membrane; and S5, preparing the Janus polylactic acid fiber membrane. According to the method disclosed by the invention, the introduction of the silicon dioxide nanoparticles and the spectral selective regulation and control of the fiber diameter enable the polylactic acid fiber membrane to have high infrared emissivity and high sunlight reflection capability, and the wetting gradient of the fiber membrane can be used for rapidly conveying water from the inner layer to the outer layer. The fiber membrane not only has excellent radiation refrigeration effect and rapid moisture absorption and sweat releasing capability, but also has good biocompatibility and degradability, the preparation process is simple, and the fiber membrane is an individual cooling material with wide application prospect.

The invention relates to a method and a machine for producing a fibrous web, preferably a tissue, paper or cardboard web or a nonwoven web, with a low-water raw material preparation of cellulose-containing fibers, preferably virgin pulp as bales and / or recycled fibers, into individual fibers and / or fiber bundles; wherein the individual fibers and / or fiber bundles are formed and solidified in an air stream into a planar fiber layup on a, preferably permeable, forming belt by a dry forming process; and wherein a fluid, preferably water and / or a water-additive mixture, is applied to the, preferably planar, fiber layup and the fibrous web is dried. The invention is characterized in that the total amount of fluid applied is distributed over at least two application steps.

A nonwoven fabric comprises a first surface, a second surface, and a visually discernible pattern on at least one of the first and second surfaces. The visually discernible pattern has a regular, repeating pattern of three-dimensional features. Each of the three-dimensional features define a microzone comprising a first region and a second region. The first and second regions having a difference in values for an intensive property. The first surface has a TS7 value in the range of about 1 dB V2 rms to about 15 dB V2 rms. The second surface has a TS7 value in the range of about 1 dB V2 rms to about 15 dB V2 rms. A ratio of the TS7 value of the first surface to the TS7 value of the second surface is in the range of about 1 to about 3.

The invention discloses a phase change energy storage waterborne polyurethane nanofiber membrane and a preparation method thereof. Lignin-based phase change microcapsules are prepared by combining ultraviolet crosslinking with lignin shell packaging, and then the nanofiber membrane containing the phase change microcapsules is prepared through an electrostatic spinning technology. And finally, constructing the waterborne polyurethane phase change fiber membrane with asymmetric wettability through a low-temperature plasma technology. According to the invention, lignin is self-assembled to form nanoparticles, and ultraviolet light induces free radical polymerization to form a polymer film, so that the packaging capability of the phase change material is improved. The phase change microcapsule prepared by the method is high in packaging efficiency and excellent in phase change performance, the preparation process is green and environment-friendly, the technological operation is simple, the temperature of the prepared phase change energy storage waterborne polyurethane nanofiber membrane conforms to the comfortable temperature range of a human body, and the phase change energy storage waterborne polyurethane nanofiber membrane has excellent temperature regulation, waterproof and moisture permeable performance and is suitable for being used in the field of water treatment. Good application prospects are realized in the field of functional textiles with functions of intelligent temperature regulation, water resistance and air permeability and the like.

The invention belongs to the technical field of medical materials, and particularly relates to a seawater self-adhesive wound dressing capable of rapidly stopping bleeding and a preparation method of the seawater self-adhesive wound dressing. The electrospun fiber wound dressing provided by the invention contains an efficient hemostatic, and can quickly promote blood coagulation, shorten the hemostasis time and provide timely and effective first-aid measures for patients. By means of the multi-layer structural design, especially the self-adhesive waterproof layer, seawater permeation can be effectively prevented, wounds are protected against seawater erosion, and the infection risk is reduced. The composite breathable film with the gradient aperture design is adopted, it can be guaranteed that water vapor in the wound area is discharged smoothly, invasion of outside moisture and bacteria can be blocked, and the wound is kept dry and clean. The electrospun fiber wound dressing provided by the invention has the advantages of rapid hemostasis, seawater erosion prevention, excellent self-adhesion, good air permeability, structural stability and the like, and is a wound dressing suitable for wound treatment in marine emergency rescue and daily marine activities.

The present invention is an electrospun web including a carrier substrate and an electrostatically charged nanofiber. The electrospun web has a pressure drop of about 5 mmH2O or less, a percent penetration of about 50% or less, and a clarity of about 80% or more.

The invention relates to the technical field of film material preparation, and discloses a polylactic acid antibacterial packaging film and a preparation method thereof, the polylactic acid antibacterial packaging film comprises the following raw material components by weight: 60-80 parts of polylactic acid, 10-20 parts of polyvinyl alcohol, 10-20 parts of nano zinc oxide, 0.5-1.5 parts of nano cellulose, 1-3 parts of an antibacterial agent, and 10-15 parts of corn starch; the antibacterial agent is prepared from the following components in parts by weight: 5-10 parts of carboxymethylated chitosan and 0.5-2 parts of a dynamic disulfide bond cross-linking agent, the substitution degree of the carboxymethylated chitosan is greater than or equal to 80%, the antibacterial agent is prepared from tea tree essential oil and eugenol, and the dynamic disulfide bond cross-linking agent is bis (3-aminopropyl) disulfide. By adopting a composite system of carboxymethylated chitosan and a dynamic disulfide bond cross-linking agent, the technical effects of humidity-triggered self-repairing and mechanical property synergistic improvement are achieved, and compared with a packaging film with a single polymer base material in the prior art, the problem of antibacterial failure caused by mechanical damage is solved.

Provided is an electroconductive sheet 10 comprising an aromatic polyamide pulp, a fluororesin, a carbon-based electroconductive substance, and an electrode catalyst. Also provided is a production method for the electroconductive sheet, the method comprising: a step X1, in which a slurry X1 including an aromatic polyamide pulp, a fluororesin, a carbon-based electroconductive substance, and an electrode catalyst is prepared and the slurry X1 is formed into a sheet by wet laying to obtain an electroconductive-sheet precursor X1; and a step Y1, in which the electroconductive-sheet precursor X1 is hot-pressed in air at a temperature of 100-350°C and a linear pressure of 10-50 N / m and thereafter fired in an inert gas at 200-500°C. Use may be made of a method in which either one of a slurry X2-1 containing no electrode catalyst and a slurry X2-2 containing the electrode catalyst is formed into a sheet by wet laying to obtain the electroconductive-sheet precursor, and the other slurry is formed into a sheet by wet laying on one surface of the electroconductive-sheet precursor.

The invention discloses a C5F10O mixed gas decomposition component adsorption material as well as a preparation method and application thereof. The adsorption material is a metal organic framework / nanofiber composite membrane which is prepared by uniformly dispersing a metal organic framework material on a nanofiber membrane obtained by an electrostatic spinning technology through a spraying doping method and is used for adsorbing decomposition components of C5F10O mixed gas. According to the adsorption material provided by the invention, through mutual cooperation of the metal organic framework material and the porous nanofiber membrane base material, a formed composite membrane has a larger specific surface area and more metal active sites, adsorption of gas molecules is promoted, permeation and diffusion of the gas molecules are also facilitated, and the adsorption efficiency is improved. Therefore, the gas sensitivity and the adsorption effect of the adsorption material are remarkably improved.

The invention discloses a preparation method and application of a bimetal organic framework composite fiber membrane, and the preparation method comprises the following steps: 1) adding polyacrylonitrile, an organic ligand and a pore-foaming agent into an organic solvent, uniformly stirring and mixing at room temperature, carrying out electrostatic spinning to obtain primary fibers, and soaking the primary fibers to remove the pore-foaming agent, so as to obtain primary fibers; drying to obtain a polyacrylonitrile nanofiber membrane containing the organic ligand; 2) placing the polyacrylonitrile nanofiber membrane in a mixed solution of bimetallic salt to prepare a fiber membrane containing bimetallic MOF (Co / Zn-MOF) crystal nucleus, and washing the fiber membrane with deionized water for three times; and 3) immersing the fiber membrane into an organic ligand solution, reacting at room temperature, washing with deionized water, and drying to obtain a target product. The antibacterial rate of the bimetallic MOF modified nanofiber membrane prepared by the method in 24 hours can reach 99.5% or above, the removal rate of a common anionic dye solution is 80% or above, and the purpose of efficiently and safely treating industrial wastewater is achieved.

The invention discloses a preparation method of a composite phase-change temperature-adjusting organic fiber membrane with a flexible core-shell structure, and belongs to the field of intelligent textile materials.The preparation method comprises the following steps that polyacrylonitrile (PAN) serves as a sheath layer material, n-octadecane serves as a core layer phase-change material, and the composite phase-change fiber membrane is prepared through a melt spinning method and a coaxial electrostatic spinning technology. According to the invention, the fiber membrane with high melting enthalpy value (171.6 J / g), excellent thermal stability (the latent heat is still 117.7 J / g after 100 times of heating-cooling circulation) and excellent mechanical properties (the tensile strength is 2.418 MPa, the tensile yield stress is 2.331 MPa, the tensile strain at break is 36.5%, and the elastic modulus is 58.226 MPa) can be prepared; a new thought is provided for preparing intelligent textiles with good flexibility and efficient heat management capability.

The invention discloses a multifunctional composite hydrophobic membrane and a preparation method thereof, in the hydrophobic membrane, nano silicon dioxide, hydroxyl multi-walled carbon nanotubes and perfluorooctyl ethyl acrylate are polymerized to obtain a modified composite material, the modified composite material is added into a polyvinylidene fluoride-hexafluoropropylene copolymer, fibers are formed through an electrostatic spinning method, the fibers are deposited on a polyester net base lining, and the multifunctional composite hydrophobic membrane is prepared. Nano-silica and hydroxyl multi-walled carbon nanotubes are modified, agglomeration is effectively avoided, the hydrophobic membrane has good mechanical strength and toughness, and microcosmic multi-dimensional roughness of the surface of the membrane can be achieved by introducing an inorganic-organic nano hybrid material. Fluorine atoms in a perfluorooctyl ethyl acrylate structure have relatively low surface energy, so that the surface energy of the film can be remarkably reduced, the surface of the film has low surface energy and a rough structure, and the film is high in hydrophobicity and good in chemical stability.

Methods of manufacturing a substrate including a component, such as superabsorbent material, having a volatile hydrophobic coating are disclosed. The method can include providing a fluid supply including a liquid and providing a supply of the component. The component can include a volatile hydrophobic coating. The method can include introducing the component to the fluid supply. The method can also include transferring the component in the fluid supply to provide the substrate. The method can further include applying heat to the substrate. The heat can remove the volatile hydrophobic coating from the component.

Methods of manufacturing an article of apparel that include moving a plurality of first projection sets positioned on a conveyor into a work zone. Each first projection set includes a plurality of projections disposed around a winding field. The methods include winding a respective continuous thread on each respective first projection set to form a thread layer including a plurality of thread lines, with each thread line extending between two respective projections and across the winding field. The methods also include, after winding the respective continuous threads, advancing the conveyor to move the first projection sets out of the work zone and to move a plurality of second projection sets into the work zone.

Articles of apparel and methods of making articles of apparel comprising one or more continuous threads wound around anchor points. In some embodiments, the methods can comprise winding a continuous thread around a plurality of projections to form a thread layer comprising a plurality of thread lines and impregnating at least a portion of the continuous thread with a flowable liquid polymer. In some embodiments, the methods can comprise bonding a thread layer to a rigid plate such that one or more thread lines extend across an opening formed in the rigid plate.

A system for manufacturing an article of apparel includes a plate with a plurality of projections. The system also includes a winding head with a plurality of adjacent thread guides. The thread guides among the plurality of thread guides are configured to simultaneously dispense respective continuous threads. The system also includes an actuator configured to move the winding head over the plate to wind the continuous threads around the plurality of projections on the plate.

The invention relates to the technical field of production of automobile roofs, and particularly discloses a fiber-reinforced thermoplastic composite automobile interior ceiling and a preparation method thereof. A fiber-reinforced thermoplastic composite material automotive interior ceiling comprises a base material and a fabric, and the base material sequentially comprises a bottom layer non-woven fabric, a first adhesive film, a blend fiber felt and a second adhesive film from bottom to top; the blend fiber felt is made of reinforced fibers and thermoplastic fibers through a non-woven process. The preparation method comprises the following steps of: preparing the base material by a dry method, forming the framework and compounding the fabric by using a set of mold to obtain a ceiling prototype, and then punching by using a cold mold and integrally curling and covering the base material and the fabric of the skylight opening to obtain the ceiling. The automobile interior ceiling made of the fiber-reinforced thermoplastic composite material has excellent dimensional stability and is more low-carbon and environment-friendly, and raw material leftover materials generated in the production process and products produced after the life cycle is ended are easy to recycle.

The invention relates to a fluoride-free polyimide-based film and a preparation method thereof. The method comprises the following steps: S1, preparing a polyamide acid solution; s2, fluorine-free organic silicon serving as a modifier is added into the polyamide acid solution and dispersed, a blended spinning solution is formed, and the solubility parameter difference value of the fluorine-free organic silicon and polyamide acid is 2.0 (MPa) 1 / 2 or below; s3, carrying out electrostatic spinning on the blended spinning solution to form a polyamide acid-based nanofiber layer; and S4, carrying out thermal imidization on the polyamide acid-based nanofiber layer to obtain the fluoride-free polyimide-based film. The film has a structure formed by three-dimensional cross-linking and winding of polyimide-based nanofibers, and the polyimide-based nanofibers are composed of a polyimide base material and fluorine-free organic silicon dispersed in the polyimide base material. The method does not involve fluorine-containing raw materials, and is environment-friendly and high in process compatibility. The film provided by the invention has excellent waterproofness, air permeability and mechanical properties at the same time.

In its main aspect, the invention relates to a flame shield for an electric vehicle battery, in particular a lithium-ion battery, and to a method for manufacturing it. The flame shield according to the invention comprises at least one flame-resistant layer consisting of a porous fibrous non-woven impregnated with polyurethane, wherein the fibers comprised in the porous fibrous non-woven have a melting temperature of at least 1100°C, the polyurethane does not comprise any flame retardant and the polyurethane impregnates the fibrous-non woven in such a way that the flame-resistant layer is impervious to airflow. In a second aspect, the invention concerns a battery housing wherein the battery lid and / or the battery tray comprise such a flame shield.

The invention relates to the field of hygienic products, and particularly discloses a probiotic hygienic product and a preparation method thereof. The probiotic hygienic product comprises a probiotic non-woven fabric, the probiotic non-woven fabric contains fibers rich in probiotics, and a preparation method of the fibers rich in the probiotics comprises the following steps: dissolving soybean protein isolate and calcium chloride to obtain a receiving solution; performing coaxial electrostatic spraying on the shell layer solution and the core layer solution to obtain probiotic embedded particles; carrying out electrostatic spinning on polyethersulfone to obtain a polyethersulfone nanofiber membrane; adding the probiotic embedded particles into a pectin solution to obtain a spraying solution, and spraying the spraying solution on the polyether sulfone nanofiber membrane to obtain blended powder; and mixing the blended powder with PE resin and an auxiliary agent according to a mass ratio, extruding, granulating to obtain a shell material, and carrying out composite spinning on the shell material and PET slices. The probiotic hygienic product disclosed by the invention has the advantages of high survival rate of probiotics, good storage stability, high activity retention rate, high water-holding capacity and good antibacterial activity.