446 results about "Fiber diameter" patented technology

Provided is a versatile nonwoven fabric having excellent heat resistance and mechanical strength and applicable to applications requiring heat resistance; or a nonwoven fabric having excellent heat resistance, mechanical strength, and permeability. Moreover, provided is a separator for electrochemical elements having excellent heat resistance and mechanical strength. Furthermore, provided is a membrane support having excellent heat resistance, mechanical strength, and ion permeability.The nonwoven fabric of the present invention comprises a polymethylpentene component and a polyethylene component, wherein the polyethylene component is fused, and wherein the polymethylpentene component accounts for 30% by volume or more of the total fibers constituting the nonwoven fabric, and the polyethylene component accounts for 30% by volume or more of the total fibers constituting the nonwoven fabric. The separator for electrochemical elements of the present invention comprises the nonwoven fabric. Another nonwoven fabric of the present invention comprises core-sheath composite fibers having a polyethylene component as a sheath component and a polymethylpentene component as a core component, wherein the polyethylene component as the sheath component of the core-sheath composite fiber is fused, wherein the polymethylpentene component accounts for 30% by volume or more of the total fibers constituting the nonwoven fabric, and the polyethylene component accounts for 30% by volume or more of the total fibers constituting the nonwoven fabric, wherein a thickness of the nonwoven fabric is 100 μm or less, and the nonwoven fabric has a direction with a tensile strength per mass per unit area of 2.0 N / 5 cm-width or more, or wherein a ratio (L / D) of a fiber diameter (D, unit: μm) to a length (L, unit: μm) of the core-sheath composite fiber is 350 or more. The membrane support of the present invention comprises the other nonwoven fabric.

The invention discloses an intelligent analysis and self-adaptive regulation and control system for a glass fiber wiredrawing forming process, which relates to the technical field of high silica glass fiber product processing and comprises a multi-modal data acquisition unit, a process prediction model unit, a reference process model unit, a self-adaptive regulation and control decision unit and a control execution unit. By introducing the prediction model and the self-adaptive decision-making unit, two strong coupling parameters of speed and temperature can be decoupled, collaborative optimization regulation and control are carried out, precise control over the wire drawing process is achieved, the uniformity of the fiber diameter is remarkably improved, the future process trend can be predicted on the basis of real-time data, and the method has good application prospects. Traditional feedback control is improved into predictive feedforward control, fine adjustment is carried out before process parameters are obviously deviated, the rate of finished products is greatly improved, meanwhile, the optimal production process is solidified into a reference model, complex regulation and control logic is precipitated into a decision algorithm, and dependence on artificial experience is eliminated.

The present application relates to a kind of superfine alkali earth hexaaluminate inorganic fiber and its preparation method, the diameter of the alkali earth hexaaluminate inorganic fiber described is 0.1 μm-3.0 μm, and it is continuously adjustable in this range, the prepared alkali earth hexaaluminate fiber keeps fiber flexibility in the temperature range of room temperature to high temperature 1300 DEG C, and keeps fiber crystal phase stability and fiber form integrity at high temperature 1400 DEG C.The preparation method is to mix aluminum sol, alkali earth salt, high molecular polymer and dissolve in water to obtain sol, then electrospinning precursor fiber is obtained, and the precursor fiber is obtained by high-temperature heat treatment to obtain alkali earth hexaaluminate inorganic fiber.The present application has low cost, and fiber structure stability is good, has wide application prospect in the fields such as catalyst, catalyst carrier, fiber structure reinforcement, heat insulation and the like.

This invention relates to a rare earth aluminate inorganic fiber and its preparation method, wherein the main crystalline phase of the rare earth aluminate is composed of ReAl. 11 O 18 Composed of ReAlO3 (Re = La, Ce, Pr, Nd), the relative content of the two phases is continuously adjustable within the range of 0–100 wt%. The fiber diameter ranges from 0.2 μm to 6.0 μm. The fiber maintains flexibility under high-temperature conditions from room temperature to 1450℃ and maintains microstructure and crystalline phase stability from room temperature to 1650℃. The preparation method uses aluminum sol as the aluminum source, rare earth salts as the rare earth source, and a polymer as a spinning aid. Precursor fibers are obtained by electrospinning or centrifugation, and the precursor fibers are then heat-treated to obtain rare earth aluminate inorganic fibers. This invention features sol stability, good spinnability, simple preparation process, and low cost. The prepared inorganic fibers have a stable and controllable structure, intact morphology, and good flexibility, showing promising applications in thermal insulation, flexible electronics, flue gas dust removal, and battery separators.

The invention discloses an ultra-wideband heterogeneous five-core anti-resonance optical fiber for transmission from ultraviolet to intermediate infrared, and belongs to the technical field of optical fiber communication. The heterogeneous five-core anti-resonance optical fiber sequentially comprises a perfect matching layer, an outer cladding layer, a first light guide unit, a second light guide unit, a third light guide unit, a fourth light guide unit and a fifth light guide unit from outside to inside along the fiber diameter, wherein the first light guide unit, the second light guide unit, the third light guide unit, the fourth light guide unit and the fifth light guide unit are arranged in the outer cladding layer. A plurality of nesting tube assemblies and gap tube assemblies with the same or different structures are arranged in each light guide unit in the circumferential direction at equal intervals, and a central air fiber core area, a left upper air fiber core area, a right lower air fiber core area, a right upper air fiber core area and a left lower air fiber core area are defined by the assemblies and work at the wave bands of 0.15-2.0 m, 2.0-3.0 m, 3.0-4.0 m, 4.0-6.0 m and 6.0-7.0 m correspondingly. And all the components show extremely low restrictive loss, dispersion close to zero and a relatively low nonlinear coefficient.

To provide a liquid crystal polymer composition that exhibits excellent compoundability and enhanced thermal conductivity while maintaining mechanical strength, toughness, fluidity, and heat resistance of a liquid crystal polymer.SOLUTION: A liquid crystal polymer composition of the present invention comprises a liquid crystal polymer, a plate-like filler having an aspect ratio of 3 or more, a glass fiber having an average fiber diameter of 5 to 15 μm, and a polybenzazole fiber having an average fiber diameter of 5 to 15 μm.SELECTED DRAWING: None

The invention discloses a polyamide cable material as well as a preparation method and application thereof. The cable material is prepared from the following raw materials in parts by weight: 100 parts of polyamide, 10 to 40 parts of nano magnesium hydroxide whisker, 1 to 5 parts of silane coupling agent, 1 to 5 parts of amphiphilic block copolymer, 1 to 10 parts of pentaerythritol triacrylate and 1 to 5 parts of antioxidant, wherein the fiber length of the nano magnesium hydroxide whisker is 200 to 1000 nm, and the fiber diameter of the nano magnesium hydroxide whisker is 30 to 80 nm. The polyamide cable material has good temperature resistance (can tolerate the high temperature of 135 DEG C for a long time), flame retardance (the limit oxygen index can reach 31% or above, preferably 33.5%), mechanical properties (excellent tensile strength and low-temperature impact resistance) and relatively high volume resistivity.

The invention provides a high-precision simulation method for filtering performance of a mining dustproof mask fiber structure. The high-precision simulation method comprises the following steps: establishing a randomly distributed fiber aggregate model; a transient state is activated in Fluent, a turbulence model Realizable k-epsilon is selected, the pressure drop of a mining dust mask and the flow field characteristics of nanoscale fiber gaps are simulated and predicted, a DPM model is activated, the migration track of 0.3-10 [mu] m inhalable particles is tracked, and the dust trapping process of a fiber structure is simulated in the transient state environment. By simulating the influence of different fiber diameters, fiber volume fractions, airflow flows and the like on the filtering performance of the fiber structure of the mining dust mask, the research and development of the high-filtering-performance mining dust mask can be guided in a targeted manner, and the influence of the internal fiber structure of the dust mask on the filtering performance of the dust mask is mastered.

There is provided a method for producing a product by cells, the method including filtering a cell broth through a porous membrane to obtain a product by the cells, in which the porous membrane has a liquid contact surface having at least any one selected from the group consisting of an opening ratio of 57.5% or less, a pore diameter having a coefficient of variation of 0.5 or less, and a ratio of pore diameter / fiber diameter of 1.3 or less, and the liquid contact surface has at least any one selected from the group consisting of a structural anisotropy of 0.97 or more and 1.03 or less and a ratio of long pore diameter / short pore diameter of 1.8 or less, and a shear stress due to a flow of the cell broth on the liquid contact surface is set to 4.0 N / m2 or less.

This film-forming composition for skin contains the following components (A) to (E). A phospholipid (A) A sterol ester (B) A C10-24 higher alcohol (C) Water (D) Water-insoluble fibers (E) having an average fiber diameter of 0.3 μm to 5 μm and an average fiber length of 20 μm to 300 μm In the film-forming composition for skin, the mass ratio (B) / (E) of component (B) to component (E) is 1 to 15. The water-insoluble fibers of component (E) preferably have a variation coefficient value of the fiber length of 40% to 100%.

Provided is a carbon material containing carbon fibers having a structure in which cylindrical carbon hexagonal net surfaces are laminated in the fiber thickness direction, and having an average fiber diameter of 140 nm or more and an average fiber length of less than 5.0 μｍ.

The application discloses a SiON micro-nano fiber membrane with electromagnetic wave transmission and high-temperature heat insulation, and a preparation method and application thereof, and relates to the technical field of ceramic fibers.The fiber membrane is formed by overlapping SiON micro-nano fibers; the arrangement mode of the SiON micro-nano fibers in the fiber membrane is disordered or directional; the diameter of the SiON micro-nano fibers is 100 nm to 1.3 mu m; the content of Si element in the SiON micro-nano fibers is greater than 35 at.%, the content of O element is greater than 30 at.%, the content of N element is greater than 12 at.%, and the content of C element is less than 7 at.%. The SiON fiber membrane prepared by the application has the component / structure characteristics of micro-nano fiber diameter (100-1200 nm), low carbon and amorphous, and exhibits the characteristics of light weight, porosity, wave transmission, heat insulation, high-temperature stability and the like, and is a novel wave transmission and heat insulation integrated fiber material with wide application prospect.

The application relates to the technical field of refractory metal material processing, in particular to a vacuum smelting system and method for high-purity molybdenum and a fiber-structure molybdenum material, the vacuum smelting system for high-purity molybdenum comprises a three-layer composite crucible, the vacuum smelting method for high-purity molybdenum comprises the following steps: step S1): under the condition of a vacuum degree of less than or equal to 5*10 ‑3 Pa, a three-layer composite crucible is used to perform consumable smelting on molybdenum raw materials; step S2): a directional solidification rate is controlled to be 8-12 mm / min, and a longitudinal temperature gradient is formed to be greater than or equal to 100 DEG C / cm; step S3): multi-stage plastic deformation is implemented on a solidified ingot, and a total deformation amount is greater than or equal to 90%; the fiber-structure molybdenum material is formed with a longitudinal continuous fiber structure in the material, a grain length-diameter ratio is greater than or equal to 10:1, a fiber diameter is less than or equal to 5 microns, hydrogen content is less than or equal to 5 ppm, oxygen content is less than or equal to 50 ppm, and a room-temperature tensile strength is greater than or equal to 780 MPa; the application can prepare high-purity fiber-structure molybdenum material, and improves the problem of insufficient axial performance caused by the isotropy of a traditional equiaxed crystal structure.

The application discloses a preparation method of MTO catalyst. The method comprises the following steps: a) treating a phosphosilicate aluminosilicate molecular sieve in a titanium acid ester-containing alcohol solution, and drying to obtain a modified molecular sieve; b) mixing the modified molecular sieve obtained in the step a), a liquid medium, a matrix material, a structure reinforcing material and a binder to form a suspension; the structure reinforcing material is ceramic fiber with a diameter of 2-6 microns and a length-diameter ratio of 1-15; c) high-speed shearing the suspension obtained in the step b), and spray drying to obtain a microsphere catalyst; and d) calcining the microsphere catalyst obtained in the step c) to obtain a finished catalyst. The catalyst solves the problems of poor catalytic performance and high abrasion index of the fluidized bed catalyst in the prior art.

A method of forming spun fibers (e.g., glass fibers) having a more uniform or constrained fiber diameter and / or length distribution is disclosed. Spun fibers having improved property distributions across the fiber volume facilitate the formation of improved nonwoven fiber mats and products (e.g., coated glass facings) formed from the mats. The coated glass facings are suitable for use as facing materials, such as for gypsum or polyisocyanurate boards. Because the nonwoven mats are formed from a blend of smaller and larger fibers, and because the coating applied to the mats includes filler components having smaller and larger particle sizes, the faced wallboard can have improved air permeability properties, which allows for better prevention of leaks, blotching, and other visual defects.

According to one embodiment, provided is an electrode including a plurality of active material particles and fibrous carbon. The fibrous carbon includes a first portion having a fiber diameter W1 within a range of 60 nm or more and 500 nm or less and a second portion having a fiber diameter W2 smaller than the fiber diameter W1. At least part of the second portion is in contact with plurality of the active material particles.

The invention discloses a coating mold used after tapered optical fiber drawing and a using method thereof, and relates to the technical field of tapered optical fibers. A fiber penetrating opening is formed in the axis of the die body, a feeding connector communicated with the fiber penetrating opening is fixed to the peripheral side face of the die body, the die lip is fixed to the inner bottom end of the fiber penetrating opening, an air sealing ring is fixed to the top end of the die body, an air cavity is formed in the air sealing ring, and the inner hole face of the air sealing ring is flush with the inner wall of the fiber penetrating opening. And a plurality of air ports are annularly and uniformly formed in the inner side of the air seal ring. Through the design of the adapter pipe and the storage pipe, supply of a coating material can be actively supplemented or reduced according to fiber diameter changes of an optical fiber body, the device is close to a coating mold, the coating pressure in the mold can be rapidly controlled, the problem of uneven supply of the coating material is avoided, pressure balance in the mold is ensured, the coating effect is ensured, meanwhile, the situation of coating material leakage is avoided, and the production efficiency is improved. The method is suitable for tapered optical fibers.

The invention relates to a curable fluoroelastomer composition having low swelling tendency, comprising: A) a curable fluoroelastomer; B) a curing system; and C) 0.1 wt.-% to 30 wt.-% of a nitrogen-containing polymer, selected from polyimide, polyimide, mixtures and / or copolymers thereof, each relative to the total weight of fluoroelastomer and nitrogen-containing polymer, the nitrogen-containing polymer being present in particulate form of an average particle size in the range of 0.15 to 70 μm and / or in fiber form having an average fiber diameter in the range of 0.15 to 70 μm.

The invention discloses a method for measuring and calculating the diameter of a carbon fiber by a weighing method, which comprises the following steps: pretreatment: removing a sizing agent on a carbon fiber tow to be measured and calculated to obtain a pretreated carbon fiber tow; and calculating: selecting more than two carbon fibers from the pretreated carbon fiber tow as samples, and calculating the d average of the carbon fibers in the pretreated carbon fiber tow according to d average = square root of [4m / (epsilon pi rho L total)]. The to-be-measured carbon fiber tow is pretreated, so that the interference of a sizing agent can be eliminated, and the authenticity of diameter measurement is guaranteed; actual density rho is introduced to replace a general value, and the influence of batch fluctuation can be overcome; a plurality of sampling and correction coefficients epsilon are adopted, and the non-circularity and representativeness of the section are considered. The above means cooperate to make the weighing method really adapt to the material characteristics and structural characteristics of the carbon fibers, system errors are inhibited from the source, and the accuracy and repeatability of measurement results are significantly improved.

A filter sheet media (1) for air / gas filtering applications fulfilling the criteria of standard EN779:2012 class M6 filter media, the filter sheet media (1) comprises: a first group of glass fibers (20) having a fiber diameter in a range of greater or equal to 6 μm up to 20 μm; a second group of glass fibers (30) having a fiber diameter in a range of 0.2 μm to less than 6 μm; a binder (40); the second group of glass fibers (30) have a fiber distribution gradient over the thickness (13) of the filter sheet media (1) so that the second group of glass fibers (30) are distributed through the thickness (13) of the filter sheet media (1), the filter sheet media (1) having more second group of glass fibers (30) near the first surface (11) than the second surface (12). Also disclosed is a method for manufacturing.

The application relates to a silk fibroin-based fabric processing method with personal heat and moisture management capability, and belongs to the technical field of functional textile processing. The prepared silk fibroin-based fabric with personal heat and moisture management capability comprises, from outside to inside, a fabric A layer, a fabric B layer and a heptadecafluorodecyltrimethoxysilane coating layer; the fabric A layer is a silk fibroin fiber containing nano-aluminum oxide and polyethylene oxide, and the fabric B layer is a silk fibroin fiber containing nano-boron nitride. The prepared heat and moisture management silk fibroin-based fabric adopts nano-aluminum oxide to enhance the sunlight reflectivity of the fabric, adopts nano-boron nitride to improve the heat conductivity coefficient of the fabric in the vertical direction and the parallel direction, realizes excellent directional sweat-releasing effect by using the fiber diameter, pore distribution and wettability gradient difference of each layer, has excellent biodegradability, has service comfort, and realizes cooling in an outdoor high-temperature environment.

A fiber diameter measuring device, an inorganic fiber sheet producing device, a method for measuring a fiber diameter, and a method for producing an inorganic fiber sheet, capable of guaranteeing continuous safeness of the fiber diameter of an inorganic fiber in an inorganic fiber sheet is provided. A method further capable of measuring the fiber diameter of the inorganic fiber in the inorganic fiber sheet, not only after the production of the inorganic fiber sheet but also during the production of the inorganic fiber sheet is provided. The fiber diameter measuring device includes a sampling section capable of sampling a predetermined amount of the inorganic fiber in an entire area of the inorganic fiber sheet; and a measuring section configured to measure a fiber diameter of the sampled inorganic fiber.

The invention relates to the technical field of lithium ion batteries, and discloses a polyethylene oxide nanofiber modified lithium iron phosphate positive electrode material, a polyethylene oxide nanofiber modified lithium iron phosphate positive electrode plate and a lithium ion battery. The polyethylene oxide nanofiber modified lithium iron phosphate positive electrode material comprises lithium iron phosphate and polyethylene oxide nanofiber in a content mass ratio of (90-98): 1, the polyethylene oxide nanofiber is obtained by electrostatic spinning of a spinning solution containing polyethylene oxide; the fiber diameter of the polyethylene oxide nanofiber is 50-500 nm, and the specific surface area of the polyethylene oxide nanofiber is 30-50 m < 2 > / g. When the polyethylene oxide nanofiber modified lithium iron phosphate positive electrode material provided by the invention is used in a lithium ion battery, the lithium ion transmission efficiency can be improved.

Provided is an artificial leather that achieves both a soft texture and excellent durability, and a method for manufacturing the same, the leather comprising: a fibrous base material formed from superfine fibers having an average single fiber diameter of 0.1-10 μm; and a polymeric elastic body, where the polymer elastic body comprises a compound having a hydrophilic group and a compound having an ethylene oxide skeleton, the content of the compound in the polymeric elastic body of the artificial leather being 0.1-5 parts by mass per 100 parts by mass of the polymeric elastic body.

The invention relates to the technical field of biochemical engineering, and particularly discloses a polyester fiber membrane and a preparation method thereof. The polyester fiber membrane is prepared from a copolymer shown in the formula I through electrostatic spinning. The prepared polyester fiber membrane is uniform in fiber diameter, good in gas permeability and high in relative cell survival rate, and has wide application prospects in the field of biomedicine. I

This invention relates to a nonwoven fabric (1) for use as a toner sealant to prevent toner leakage from the outer peripheral surface of the end of a rotating body carrying powder toner in an image forming apparatus. The surface of the nonwoven fabric (1) has recesses (2) and protrusions (3) extending along the length direction (4) of the nonwoven fabric. The recesses (2) are groove-shaped. The average fiber diameter of the constituent fibers (6) is 14.0 μm or less. The orientation of the constituent fibers (6) of the nonwoven fabric (1) is orthogonal or inclined relative to the length direction (4) of the nonwoven fabric (1). The constituent fibers (6) are not thermally bonded to each other. The angle of the orientation of the constituent fibers (6) relative to the length direction (4) of the nonwoven fabric (1) is preferably 45° to 135°.

A nanodiamond-reinforced nanofiber scaffold system for skin regeneration, consisting of a multilayered, electrospun nanofiber matrix formed from one or more biocompatible polymers selected from polycaprolactone (PCL), poly(lactic-co-glycolic acid) (PLGA), chitosan, gelatin or collagen, wherein nanodiamonds are present in an amount of 0.1 to 5 wt.-% are incorporated and surface-functionalized with oxygen, hydroxyl, or carboxyl groups to ensure homogeneous dispersion within the polymer matrix, the scaffold being characterized by a controlled fiber diameter in the range of 100 to 800 nm, an interconnected porosity between 60 and 90%, a tensile strength of 2 to 10 MPa, a degradation time of 2 to 8 weeks, and the ability to improve cell adhesion, proliferation, and migration of fibroblasts and keratinocytes, while simultaneously exhibiting antioxidant activity, reduced formation of reactive oxygen species, and the optional incorporation of bioactive agents selected from growth factors, antioxidants, or antimicrobial compounds to accelerate wound healing and skin tissue regeneration.

The present invention relates to a negative electrode material and a preparation method thereof, and to a lithium ion battery. [Solution] The anode material comprises a core and a first coating layer covering at least a portion of the surface of the core, the core comprising a silicon-based material, the first coating layer comprising a carbon material, a fibrous material distributed on at least a portion of the surface of the first coating layer, and the fibrous material and the anode material satisfy the mathematical formula (I). The presence of the fibrous material on the surface of the first coating layer of the present invention allows the anode material to accept electrons and lithium ions at a high speed, improving the conductivity of the anode material and thereby improving the rate performance of the anode material. TIFF2025538257000009.tif17170 (In formula (I), D wire is the minimum fiber diameter (nm) of the fiber material, and D 10 is the particle size (nm) corresponding to when the cumulative particle size distribution number of the negative electrode material reaches 10%, and ρ is the powder conductivity (S / cm) of the negative electrode material.

The application relates to the technical field of biomaterial modification, and particularly relates to a method for carrying out directional enzymolysis treatment on the surface of defatted cotton through composite plant protease, which comprises the following steps: physically pretreating the defatted cotton to enhance the surface activation degree; preparing a composite enzyme solution containing bromelain, pectinase and xylanase; contacting the pretreated defatted cotton with the composite enzyme solution to carry out directional enzymolysis under controlled conditions; controlling the enzymolysis depth by adjusting the reaction temperature and pH value in stages; after the reaction is completed, the enzyme activity is terminated through heat treatment, pH adjustment or addition of chemical reagents; finally, the treated defatted cotton is cleaned and dried to obtain a surface-modified defatted cotton product, selective directional enzymolysis of the outer layer of the defatted cotton is realized, the surface fiber diameter is reduced by 8-12%, the internal fiber structure is kept intact, the tensile strength retention rate is greater than or equal to 85%, and the problem that the depth of the existing enzymolysis technology is uncontrollable is solved.