112results about How to "Small fiber diameter" patented technology

The present invention relates to porous bone filling materials prepared by sintering bioactive glass fibers in order to achieve a three dimensional block with interconnecting porosity. Due to the osteoconductive properties the bioactive glass fibers, in block form are an ideal scaffold for new tissue (e.g. bone or cartilage) formation to occur. The manufacturing parameters can be adjusted to achieve porosities as high as 90 vol-%, or the manufacturing parameters can be adjusted to prepare strong porous blocks useful in load bearing application.

Provided are a spinning apparatus capable of stably spinning fibers having a small fiber diameter with a high productivity, an apparatus comprising the same for manufacturing a nonwoven fabric, a process for manufacturing a nonwoven fabric using the nonwoven fabric manufacturing apparatus, and a nonwoven fabric produced by the process.

The spinning apparatus of the present invention comprises one or more exits for extruding liquid, which are capable of extruding a spinning liquid, and one or more exits for ejecting gas, which extend linearly and are located upstream of each of the exits for extruding liquid and which are capable of ejecting a gas, wherein a shearing force by the gas and its accompanying airstream can be single-linearly exerted on the spinning liquid extruded. The apparatus of the present invention for manufacturing a nonwoven fabric comprises a fibers collection means as well as the spinning apparatus. The process of the present invention for manufacturing a nonwoven fabric is a process using the apparatus for manufacturing a nonwoven fabric. The nonwoven fabric of the present invention is a nonwoven fabric produced by the process.

The invention discloses a making method of polyacrylonitile hole-large hole ultra-fine carbon fiber, which comprises the following steps: dissolving polymerization to decompose completely under non-oxidizing environment through heat and polyacrylonitile or polyacrylonitile copolymer in the solvent; preparing super-fine fiber through high-pressure electrostatic spinning method; drying fiber; preoxidizing at 100-300 deg.c; carbonizing at 300-1800 deg.c in the nitrogen or other inert gas environment; decomposing heat-decomposable polymerization to remain 1-200 nanometer millipore in the fiber; fitting for certain large-size particle adsorption and separation (such as virus, bacteria and so on).

The invention relates to a preparation method for a multi-component net-shaped nanofiber membrane. The preparation method includes the detailed steps that step1, mixing and beating are performed on meta-position aramid fibers, halogen salt and organic solvent by the mass ratio of 1:0.004-0.4:2.996-18.6, and a meta-position aramid fiber solution is prepared through mixing; step2, functionality high-molecular polymers and the solvent are mixed by the mass ratio of 1:5.4-98.99, then nano-particles are added, and heating and mixing are performed to prepare a functionality high-molecular solution, wherein the mass fraction of the nano-particles in the solution is 0.01-5%; step3, the meta-position aramid fiber solution obtained in the step1 and the functionality high-molecular solution obtained in the step2 are mixed by the mass ratio of 1:0.05-0.5 in a dripping mode, and then ultrasonic treatment is performed to obtain a spinning solution; step4, under the conditions of 20 DEG C-30 DEG C indoor temperature and 20-70% relative humidity, the spinning solution is used for electrostatic spinning, and finally the multi-component net-shaped nanofiber membrane with a 5nm-20nm net-shaped nanofiber diameter and reaches over 95% in net-shaped structure coverage rate is obtained. The preparation technology is simple and low in cost, tensile strength of material reaches 100MPa-2000MPa, and the functionality advantage is remarkable.

The present invention provides a spunbond nonwoven fabric made of a specific crystalline resin composition having a melt flow rate of 25 to 80 g/10 min and a melting endotherm ΔH of 65 to 100 J/g. More particularly, the invention provides a polypropylene spunbond nonwoven fabric having a very small fiber diameter and providing an excellent feel to the touch, and a polypropylene spunbond nonwoven fabric exhibiting high softness.

The invention discloses a preparing method of a silicon dioxide aerogel nanofiber composite membrane, and relates to nanofiber composite membranes. The method comprises the steps of preparing a silicon dioxide aerogel/organic solvent dispersion liquid; preparing a polymer/SiO2 spinning solution; conducting electrostatic spinning on a polymer/SiO2; conducting post-treatment on the nanofiber composite membrane. Fibers of the prepared silicon dioxide aerogel nanofiber composite membrane are in needle shapes, the average diameter of the fibers is 200-300 nm, and the specific surface area of the silicon dioxide aerogel nanofiber composite membrane can reach 55 m<2>/g; the process is simple, the preparing condition is mild, and the obtained composite nanofiber membrane is large in specific surface area and small in fiber diameter and is expected to be applied to the fields of heat insulation, adsorption, catalysis, bioengineering and the like.

The invention discloses a preparation method of a high-adsorbability cellulose diacetate composite electrostatic spinning nanofiber ordered porous film. The preparation method comprises the following steps: dissolving cellulose diacetate and polycaprolactone, or cellulose diacetate and a lactic acid-glycolic acid copolymer, or cellulose diacetate and polyvinylpyrrolidone into an organic solvent so as to prepare a spinning solution, and preparing the cellulose diacetate composite electrostatic spinning nanofiber ordered porous film by adopting an electrostatic spinning method. The method disclosed by the invention is simple, and cannot pollute the environment in the preparation process. The prepared cellulose diacetate composite electrostatic spinning nanofiber ordered porous film has tiny fiber diameter, good pore diameter and order degree, is good in dry and wet state adsorption performances, is high in water absorption, can be applied to the flue gas and tobacco industry of the dry state and wet state adsorption and filtration separation industry, is wide in market application prospect, and has relatively high application value.

The present invention has an object to provide a filter cartridge for purifying a chemical which can efficiently remove metal ions and impurities in the form of fine particles in a liquid to be filtered. The present invention provides, as the means to achieve the above described object, a filter cartridge comprising a fiber membrane material obtained by introducing ion exchange groups and/or chelate groups into an organic polymer fiber membrane base material having an average fiber diameter of 0.1 μm to 20 μm and an average pore size of 1 μm to 20 μm or a filter cartridge. And also present invention provides, as the means to achieve the above described object, comprising a bi-layered or laminated structure of filter membranes prepared from fiber membrane material obtained by introducing ion exchange groups and/or chelate groups into an organic polymer fiber membrane base material and a micro porous membrane material.

Inorganic fibers consisting substantially of silicon, carbon, oxygen and a transition metal, having a fiber size of no greater than 2 μm and having fiber lengths of 100 μm or greater.

The invention discloses a preparation method of a transparent screen with a PM2.5 fine particle filtering function. The preparation method comprises steps as follows: (1) dissolving a high-molecular polymer in a solvent, and performing stirring for dissolution at 48-55 DEG C for 1.5-2.5 h to prepare a spinning solution with the concentration of the high-molecular polymer being 6-20wt%; (2) preparing a nanofiber membrane on a nylon screen substrate by use of the spinning solution through electrostatic spinning to obtain a composite screen; (3) drying the composite screen in hot air at 65-75 DEG C for 1.5-2.5 h and naturally cooling the composite screen to the room temperature to obtain the transparent screen with the PM2.5 fine particle filtering efficiency being 70%-95% and the transparency being 40%-80%. The prepared transparent screen is high in transparency and good in breathability, has higher filtering efficiency for PM2.5 fine particles and is an excellent material in the indoor air filtering field.

Inorganic fiber paper includes first biosoluble inorganic fibers having an average fiber diameter of 3 to 7 μm, second biosoluble inorganic fibers having an average fiber diameter of 2 to 3 μm, and a binder, the average fiber diameter of the second biosoluble inorganic fibers being smaller than that of the first biosoluble inorganic fibers.

A fiber structure is obtained by spinning of a solution of an L-lactic acid condensate and a D-lactic acid condensate by electrospinning. It is possible to provide a fiber structure comprising fibers with extremely small fiber diameters, as well as excellent heat resistance and biodegradability.

The present invention provides a fine-long animal hair fibre and its production method which can fix its stretched state, do not damage crimp recovery, reduce fibre diameter, increase fibre length and raise fibre glossiness. Its production includes the following steps: (a) for animal hair stripe, implementing twisting procedure; (b) soaking the twisted animal hair stripe in alkaline aqueous solution and making the animal hair stripe undergo the process of swelling and plasticity treatment; (c) reduction procedure for cutting disulfide bond in the swelling plasticity fibre; (d) drawing procedure for actually drawing the swelling plasticity fibre to 1.20-1.60 times; (e) using oxidant to oxidate the drawn animal hair fibre; and (f). using acid to make neutralization.

The invention relates to scaffolds for use as medical devices, for guided tissue regeneration and repair, wherein the relationship between fibre diameter and pore size in a scaffold is decoupled, thereby enabling the small fibre diameters required for cell attachment and proliferation and the large pore sizes needed for cell migration into the scaffold to be achieved.

It is an object of the present invention to provide a nonwoven fabric which is excellent in the heat resistance and the chemical resistance, of which the fiber diameter is small, which is excellent in the strength and of which the maximum pore diameter is small.

A nonwoven fabric made of an ethylene/tetrafluoroethylene copolymer, characterized in that the nonwoven fabric is mutually fused continuous fibers of an ethylene/tetrafluoroethylene copolymer which has a melt viscosity of from higher than 100 to 1,500 Pa˜s at 240° C.

Disclosed is a material for filling bone defects having a three-dimensional steric structure. This material is produced by dissolving or suspending a substance in a solvent to give a solution or slurry, the substance containing a biodegradable resin as a principal component and bearing a siloxane; adding water to the solution or slurry to give a spinning solution, the water having a relative dielectric constant larger than that of the biodegradable resin; subjecting the spinning solution to electrospinning while applying a positive charge to a collector by a voltage supply and grounding a nozzle of a syringe without applying a charge thereto; thereby yielding the material on the collector.

This invention relates to a method for producing carbon fibers having a sufficiently small fiber diameter, and more particularly to (1) a method for producing carbon fibers, which comprising the steps of jetting a polymer material-containing solution by an electrospinning method to form a deposit layer of a fibrous substance comprising the polymer material and firing the deposit layer of the fibrous substance comprising the polymer material to produce carbon fibers, and (2) a method for producing carbon fibers, which comprising the steps of jetting a carbon black-dispersed and polymer material-containing solution by an electrospinning method to form a deposit layer of a fibrous substance comprising the carbon black-dispersed polymer material and irradiating microwaves to the deposit layer of the fibrous substance to produce carbon fibers.