262 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 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.

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.

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 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.

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°.

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.

This invention relates to a nanofiber highly breathable medical protective clothing fabric and its preparation method. The fabric comprises an outer protective fabric, a middle nanofiber membrane, and an inner fabric, which are sequentially composited. It mainly relies on nanofibers for filtration. The nanofibers have small diameters, large specific surface areas, high filtration efficiency, high porosity, and high moisture permeability, exceeding 9000 g / (m2·24h), which is far higher than the standard requirements for moisture permeability of existing disposable medical protective clothing, thus increasing the wearing comfort of medical personnel.

The application discloses a preparation method of a collagen membrane material which can exist stably in a body for a long time. A dense and transparent collagen membrane with a transparence of more than 95% is formed by using an electric field to control assembly of collagen fibers, the fiber structure is once physically cross-linked and solidified, and further chemical strengthening cross-linking is carried out, the cross-linking strength is improved through different reaction sites, and then the shielding of the in-vivo enzymatic cutting site is carried out. The advantage is that the collagen assembly fiber diameter can be controlled to be 30-50nm by applying high electric field energy, the collagen assembly fiber is densely and orderly arranged, the collagen assembly fiber arrangement is bionic to natural tissue collagen protein fiber arrangement, has high bionics, and can exist stably in a body for a long time.

The embodiment of the invention relates to a processing method and device for measuring the diameter of a fiber based on a scanning electron microscope graph. The method comprises the following steps: constructing and training a prediction model; receiving an SEM graph X0 of any fiber sample, and inputting the SEM graph X0 into the prediction model to obtain corresponding edge point and center point probability graphs; utilizing a graph theory algorithm to extract a unique path of each fiber according to the central point probability graph to obtain a plurality of fiber center lines; identifying the radius of each point of each center line in the positive and negative normal directions according to the edge point probability graph to obtain a corresponding radius sequence; performing center line diameter optimization on each radius sequence according to a sub-pixel refinement method driven by an energy function; performing abnormal diameter elimination based on the global statistical distribution characteristics of each diameter sequence; and performing fiber diameter visual marking on the X0 based on each fiber center line and the corresponding diameter sequence. According to the invention, the measurement precision and the measurement robustness of the fiber diameter can be improved.

An optical fiber cable (10) comprises: first optical fibers (11) each provided with a first resin part (11b) that surrounds the outer periphery of a first glass optical fiber part (11a) including a core part, the outer diameter of the first resin part (11b) being a first fiber diameter; second optical fibers (12) each provided with a second resin part (12b) that surrounds the outer periphery of a second glass optical fiber part (12a) including a core part, the outer diameter of the second resin part (12b) being a second fiber diameter larger than the first fiber diameter. At least a portion of the first optical fiber (11) is disposed in a region (A) surrounded by the outer peripheral surfaces of two second optical fibers (12) adjacent to each other and a virtual plane (VS) that is in contact with the outer peripheral surfaces of the two second optical fibers (12) and that is on the same side with respect to the central axes of the two second optical fibers (12).

To provide a polymer electrolyte membrane which is excellent in the strength and the surface property, and which can achieve a low membrane resistance when applied to a water electrolyzer, a membrane electrode assembly, a water electrolyzer, and a method for producing the polymer electrolyte membrane.A polymer electrolyte membrane comprising a fluorinated polymer having ion exchange groups and a nonwoven fabric, wherein the nonwoven fabric contains polyphenylene sulfide fibers; in a fiber diameter distribution histogram of fibers constituting the nonwoven fabric, the maximum frequency peak appears in a range of 100 to 900 nm; and the polymer electrolyte membrane has a thickness of 30 to 90 μm.

A purpose of the present invention is to provide a crosslinked-gelatin nanofiber filter which has satisfactory flexibility, is less apt to break when in use, and can have controlled solubility under specific temperature conditions. The crosslinked-gelatin nanofiber filter comprises gelatin, a thickening polysaccharide, and a cyclic sugar, does not dissolve in 20°C pure water, has a dissolution time in 25°C pure water of 60 minutes or shorter, and has an average fiber diameter of 300-600 nm.

The present application relates to a kind of humidity response type graphene fiber, fabric and its preparation method.The fiber has skin-core structure, core layer is the viscose material comprising hygroscopic expansion graphene microspheres, skin layer is viscose material;The diameter of the core layer is not more than 2 / 3 of the diameter of skin-core structure graphene / viscose fiber, the mass percentage of hygroscopic expansion graphene microspheres in core layer is 1%~5%.By setting the ratio of coil span L and the coil span L0 in basic organization as 1.2~2.5, reserve deformation space for skin-core structure graphene / viscose fiber, make the fiber that expands 8%~20% in axial after absorbing moisture produce out-of-plane buckling in coil interior, to improve local interface pressure.In the embodiment condition, the local contact pressure of wet state relative to dry state increases 5~15mmHg.

Provided is an artificial leather, which exhibits light transmitting properties and maintains its texture and touch while being dark-colored and having a medium or higher density, the artificial leather including a fiber entangled body formed of ultrafine fibers having an average single fiber diameter of 0.1 to μm; and an elastomer, in which the artificial leather has a thickness of 0.4 to 1.2 mm and a weight per unit area of 80 to 450 g / m2, where one surface of the artificial leather is a design surface colored with a dye and / or a pigment and satisfies the following Formulas (1) to (3):L*1≤55 . . .  (1)L0>50 . . .  (2)ΔL* <−5 . . .  (3)where L*1, L*0 and ΔL* are as defined.

The utility model provides a humidity-sensing dry and comfortable fabric, the fabric comprises a first material and a second material, the first material is water-absorbing swelling fibers, the yarn arrangement path number of the first material and the second material in the fabric is 3-20, the second material is non-water-absorbing swelling fibers, the first material and the second material respectively form an area A and an area B, and the area A and the area B are arranged in the area A and the area B respectively. The areas A and the areas B are arranged in a staggered mode, the areas A are of protruding structures, and the surfaces of the areas B are lower than the surfaces of the areas A; when a human body sweats in a large amount, the first material can rapidly absorb sweat of the human body, the first material is expanded under the action of immersion liquid, the diameter of fibers is increased, the curvature radius of the fibers at the interweaving points of the fabric is forced to be increased, the length of the fabric is shortened, the protruding A area is formed, and the B area is kept in the original state. Therefore, more obvious concave-convex alternate areas are formed on the surface of the fabric, the air permeability of a human body microenvironment is improved, sweat evaporation is accelerated, and the sticky feeling of a human body during wearing is reduced.

The application belongs to the field of advanced ceramic materials, and relates to a high-entropy polyacetylacetone compound precursor and a preparation method of high-entropy ceramic nanofiber aerogel, which solves the problems of easy grain growth and crystallization pulverization of traditional ceramic aerogel at high temperature. The preparation steps are as follows: synthesizing high-entropy polyacetylacetone compound precursor powder, preparing a spinning solution and adding a phase stabilizer and a polymer spinning aid, obtaining precursor fibers through far-field electrospinning, and obtaining high-entropy ceramic nanofiber aerogel with a fiber diameter of 200-2000 nm through gradient high-temperature annealing treatment. The material has good flexibility and thermal stability, and is suitable for efficient heat insulation scenes in extreme environments such as aerospace thermal protection.

To provide a carbon fiber bundle and a method for manufacturing a carbon fiber bundle that can exhibit high strength without reducing the elastic modulus, even when the diameter of the single fiber is increased. [Solution] A carbon fiber bundle in which multiple carbon fiber single fibers are bundled together, wherein the diameter of the single fibers is 6.5 μm or more and 8.5 μm or less, the strand strength is 4.5 GPa or more, and the strand modulus is 310 GPa or more, or a carbon fiber bundle in which multiple carbon fiber single fibers are bundled together, wherein the diameter of the single fibers is 6.5 μm or more and 8.5 μm or less, the strand strength is 4.5 GPa or more, and the product of the diameter of the single fiber and the strand strength is 31 or more.

The invention relates to the technical field of spinning, in particular to a coagulating bath device and application thereof. The device comprises a coagulating bath main body, a coagulating liquid outlet piece and a coagulating liquid inlet piece which are communicated with the coagulating bath main body, a spinning piece arranged in the coagulating bath main body, and a spinning stock solution feeding piece communicated with the spinning piece, the shortest distance between the center of the cross section of the liquid outlet of the solidification liquid inlet piece or a plane formed by the center of the cross section or a line segment formed by the center of the cross section and the surface of the spinneret piece is 1 / 10-1 of the diameter of the spinneret plate; the liquid inlet end of the solidification liquid outlet piece is located on the side, away from the spinning component, of the spinning solution feeding piece, and the distance between the outer wall of the solidification liquid outlet piece and the outer wall of the spinning solution feeding piece does not exceed the outer diameter of the spinning solution feeding piece. The coagulating bath device disclosed by the invention can be used for well improving the motion state of coagulating liquid; when the device is applied to preparation of large-tow carbon fibers, the diameter unevenness and the broken yarn content of the large-tow carbon fibers can be reduced, and meanwhile the tensile strength of the large-tow carbon fibers is improved.

The invention discloses a glass fiber production abnormal working condition intelligent analysis and auxiliary diagnosis method, and relates to the technical field of intelligent analysis, and the method comprises the following steps: S1, collecting real-time data, S2, calculating a mean value and a standard deviation, S3, determining a derivation index value, S4, calling a threshold rule, and S5, outputting an actual state. According to the method, key derived indexes such as the air-fuel ratio deviation and the wire diameter variable coefficient are calculated in real time and compared with a dynamic multi-stage threshold rule, and early warning can be carried out on process deviation, equipment abnormity or quality fluctuation, which means that an operator can take corrective measures before waste products are not caused by problems or equipment shutdown, so that the operation efficiency is improved. Production interruption is converted into predictable and plannable maintenance from sudden failure, and production continuity and planning performance are remarkably improved.

The invention belongs to the technical field of radiochemistry, and particularly relates to a nanofiber filter membrane as well as a preparation method and application thereof. The electrostatic spinning technology is adopted, and the nanofiber filter membrane which is uniform in structure, fine in fiber and free of defects is prepared. By regulating and controlling spinning conditions, optimal fiber diameter distribution is obtained, no spindle exists, and the mechanical property of the filter membrane is improved while the trapping efficiency of the filter membrane on ultrafine particles is improved. The obtained nanofiber filter membrane can keep mechanical stability and low resistance while capturing superfine radioactive particles, the average diameter and the pore diameter of nanofibers are extremely small, the nanofiber filter membrane has a larger comparison area and a porous structure, a large number of contact sites can be provided, and especially the nanofiber filter membrane has excellent capturing efficiency on superfine particles smaller than 100 nm.