125 results about "Fiber size" patented technology

A method for improving the wear resistance of carbon fibers sized with polyimide, the method relating to the field of materials. The method for improving the wear resistance of carbon fibers in the present invention comprises the following steps: using an impregnation method to attach a water-based sizing agent to carbon fibers for surface sizing, and drying same at 140-260℃. The wear resistance of the carbon fibers is improved by changing the drying temperature in the carbon fiber sizing process. The sized carbon fibers have the advantages of good wear resistance and minimal fuzzing, thus being capable of withstanding further weaving and processing.

The invention relates to the technical field of high polymer materials and preparation, and discloses a high-temperature-resistant ceramic polymer-derived ceramic precursor resin molding compound and a preparation method thereof. The high-temperature-resistant composite material is prepared from the following raw materials: 100 parts of high-molecular methyl hydrogen solid polysilazane resin, 1.0 to 5.0 parts of organic silicon plastic modifier, 30 to 40 parts of hybrid fiber, 1.0 to 5.0 parts of fiber sizing agent, 20 to 25 parts of high-temperature-resistant active filler, 10 to 15 parts of fluxing agent, 1.0 to 5.0 parts of high-temperature-resistant lubricant, 0.01 to 2.50 parts of curing agent, 0.1 to 5.0 parts of release agent and 1.2 parts of high-temperature-resistant pigment. Wherein the fiber sizing agent is one or more of epoxy resin, hexamethyldisilazane and polydopamine. The high-temperature-resistant ceramizable polymer derived ceramic precursor resin molding compound provided by the invention has good processability and relatively high ceramic yield.

The invention discloses a carbon fiber sizing agent composition suitable for thermoplastic resin, sized carbon fiber, a carbon fiber sizing agent as well as a preparation method and application of the carbon fiber sizing agent, belongs to the technical field of carbon fiber sizing agents, and solves the problem that a sizing agent in the prior art cannot meet excellent mechanical properties and high temperature resistance at the same time. The composition is prepared from the following components in parts by weight: 15 to 35 parts of modified polyaryletherketone resin matrix, 0.3 to 2 parts of neutralizer, 1 to 3 parts of emulsifier, 1.5 to 3 parts of defoaming agent and 57 to 80 parts of deionized water. The sizing agent containing the composition has good wettability and film-forming property on the surface of the carbon fiber, and meanwhile, the sizing agent is matched with other components with specific contents in the composition, so that the carbon fiber sizing agent containing the carbon fiber sizing agent composition has excellent heat resistance, can bear processing at the high temperature of 350 DEG C or above, and has good application prospects. And the composite material containing the sizing agent has excellent interlaminar shear strength.

Disclosed are methods for the direct production of short fibers using microdecortication processes and the production of densified particles and short fiber products, sourced from hemp or other bast plants, hemp fiber products, methods for the production of hemp fiber-reinforced polymeric materials, and the polymeric materials resulting therefrom. An embodiment of the method for the production of densified hemp fiber products involves microdecortication with the utilization of particle size reduction equipment to cut all or a portion of hemp stalk, bast fiber, and hurd to produce short fibers and particles. Some embodiments make use of microdecortication to cut whole hemp stalk directly into short hemp fiber. Equipment with cutting action may provide for more adequate control of fiber size and aspect ratio while using the whole hemp stalk to produce short fibers, as opposed to the production of short hemp fibers by cutting long hemp fibers originating from decortication.

The invention relates to the field of fiber sizing agents and polymer-based composite materials thereof, in particular to a sulfonated polyetheretherketone / amino graphene composite sizing agent of aramid fibers and application of the sulfonated polyetheretherketone / amino graphene composite sizing agent. The sizing agent is composed of sulfonated polyetheretherketone, amino graphene, a reinforcing agent and a solvent, sulfonated polyetheretherketone and amino graphene are prepared through a specific process, and the sulfonated polyetheretherketone and the amino graphene are combined with the reinforcing agent to form a stable covalent bond and a cross-linked structure. The surface wettability and mechanical property of the aramid fiber are remarkably improved, the interface bonding force of the aramid fiber and thermoplastic resin is improved, the mechanical strength and toughness of the aramid fiber composite material are improved, and the method is suitable for the field of high-performance composite materials and has important industrial value.

The embodiment of the invention provides a carbon fiber sizing agent, a modified carbon fiber, a composite material and a method, and relates to the technical field of carbon fiber surface treatment. The carbon fiber sizing agent comprises the following components: polyetherimide, amino-functionalized ZIF-8 and an organic solvent, wherein the mass of the amino-functionalized ZIF-8 is 1%-10% of the mass of the polyetherimide. According to the carbon fiber sizing agent, the modified carbon fiber, the composite material and the method provided by the embodiment of the invention, the interface bonding strength and the heat resistance of the carbon fiber and the resin matrix in the carbon fiber composite material can be improved.

The disclosure describes a kind of anti-resonant hollow fiber size parameter measurement system and measurement method, the measurement system includes sequentially connected incident light source, light source processing module, fiber to be measured, data acquisition module and data processing module, data processing module is filtered to the spectrum formed by the coherent superposition of multiple scattering light beams, Fourier transform group delay spectrum is obtained, and peak retrieval is carried out to the group delay spectrum, and the group delay difference caused by the coherent superposition of each light beam in group delay spectrum is obtained, and the size parameters of anti-resonant hollow fiber are obtained based on the multi-beam interference geometric optics model and the group delay difference between each light beam. Thus, the simultaneous on-line measurement of multiple parameters of anti-resonant hollow fiber can be realized, and the drawing efficiency and output efficiency of anti-resonant hollow fiber can be further improved, and the fiber manufacturing cost is reduced.

The present application relates to a kind of synergistic repair sizing polyimide fiber sizing agent and its preparation method and application, the raw material of the polyimide fiber sizing agent is composed of solute A and solvent B, the solute A is multifunctional epoxy resin, the solvent B is low-boiling solvent, the low-boiling solvent is acetone or ethanol, the proportion of the solute A and the solvent B is as follows: A 0.1%~10%;B 90%~99.9% by weight percentage.The polyimide fiber sizing agent of the present application can be used to repair the internal structure defect of high-performance polyimide fiber and improve the chemical activity of fiber surface, can improve the roughness of fiber surface in a short time, ensure the surface chemical reactivity, repair the internal defect of fiber by the formation of internal crosslinking point, the tensile strength and compression strength of fiber are improved, and waste liquid is easy to recover, low in cost.

The application discloses a self-emulsifying degradable carbon fiber sizing agent and a preparation method and application thereof. Raw materials of the self-emulsifying degradable carbon fiber sizing agent include the following components in parts by weight: diglycidyl ester epoxy resin monomer 20-30 parts, fatty amine 1-3 parts, amine curing agent 5-10 parts, sodium p-aminobenzenesulfonate 1-3 parts, water 15-20 parts and acetone 20-30 parts. The self-emulsifying degradable carbon fiber sizing agent can significantly improve wear resistance of the carbon fiber and interface performance of a composite material, and can be degraded under mild conditions, and the carbon fiber recovered has good performance.

The present application provides a kind of sizing agent for aqueous carbon fiber and its application, belong to fiber sizing agent technical field, according to the total mass is 100 parts, sizing agent includes: component 1: sulfonated polyarylether A 0.1-15 parts, component 2: sulfonated polyarylether B 0.1-10 parts, deionized water 75~99.8 parts, wherein the glass transition temperature of component 2 is higher than that of component 1.Sulfonated polyarylether A, sulfonated polyarylether B can be self-emulsified in water to form hydrophilic microparticles, which can be adsorbed on the surface of carbon fiber, and the two microparticles are stacked on the surface of carbon fiber to form a sizing agent layer after sizing.The sizing agent can also contain a small amount of non-ionic emulsifier;Or, mixed with general anionic, non-ionic sizing agent, improve wear resistance, temperature resistance and other properties.The sizing agent provided by the present application has the characteristics of water-soluble, heat-resistant, wear-resistant, good biocompatibility and the like.Using the sizing agent can form a mechanical interlocking structure in the fiber / matrix resin interface layer, thereby effectively improving the performance of fiber reinforced polyarylether composite material.

The application discloses a self-emulsifying high-wear-resistance vinyl carbon fiber sizing agent composition and a preparation method and application thereof. The application improves the wear resistance of the fiber by reducing the content of rigid groups such as benzene rings and double bonds, introduces hydrophilic groups such as amide bonds and ether bonds, adopts a self-emulsifying technical route, eliminates the weak boundary layer of the interface, and improves the interface performance of the fiber and the vinyl resin, so that the prepared self-emulsifying high-wear-resistance vinyl carbon fiber sizing agent composition has the advantages of self-emulsification, high wear resistance, seawater resistance, excellent carbon fiber composite material interface performance and outstanding smoke resistance, and has a wide application prospect in the preparation of carbon fiber composite materials suitable for marine environments.

Fibrous materials and methods of manufacturing fibrous materials are disclosed. In particular, this application discloses methods of making and processing serially deposited fibrous structures, such as serially deposited fibrous mats. Serially deposited fibrous mats may be used in implantable medical devices with various characteristics and features. Serially deposited fibrous mats of various mat thickness, fiber size, porosity, pore size, and fiber density are disclosed. Additionally, serially deposited fibrous mats having various amounts of fiber structures (such as intersections, branches, and bundles) per unit area are also disclosed.

The present application provides a sizing agent and a preparation method thereof, carbon fiber and composite material, belonging to the technical field of carbon fiber sizing agents. The sizing agent is in the form of an emulsion, and the sizing agent includes a main sizing agent and water; the main sizing agent includes the following components in parts by weight: 20 to 30 parts of polyphenol oxide resin, 10 to 20 parts of epoxy resin and 10 to 20 parts of emulsifier; wherein SiO2 is covalently linked to the epoxy resin. The present application covalently links SiO2 to the epoxy resin of the sizing agent, which can not only significantly increase the surface roughness of the carbon fiber after the sizing agent treatment, but also increase the number of active functional groups on the surface of the carbon fiber after the sizing agent treatment, and can also reduce the fiber fuzzing amount of the carbon fiber after the sizing agent treatment, thereby improving the interface bonding strength between the carbon fiber after the sizing agent treatment and the matrix resin, and can improve the mechanical properties of the composite material formed by the carbon fiber and the matrix resin.

The utility model belongs to the technical field of tablecloth production, particularly relates to a short fiber slasher for producing tablecloth, and aims to solve the problems that the slasher effect is not ideal due to the fact that the existing slasher is tedious to operate and size is easy to precipitate, the following scheme is provided: the slasher comprises a table body, and supporting legs are fixed at four corners of the bottom end of the table body; a feeding roller and a receiving roller are rotationally arranged on the upper side of the table body, a containing box is fixed in the table body, a slurry storage groove used for containing slurry is formed in the containing box, and a guide roller used for guiding tablecloth is rotationally arranged in the slurry storage groove; an inverted-U-shaped frame is fixed to the top end of the table body, the movable adjusting roller and the fixed adjusting roller are both arranged in the inverted-U-shaped frame and used for extruding tablecloth, and a set of adjusting assembly is arranged in the inverted-U-shaped frame and used for adjusting the distance between the movable adjusting roller and the fixed adjusting roller. The reciprocating assembly is arranged to drive the filter box to reciprocate, so that accelerated filtration of the slurry is realized, the filtration efficiency is improved, and the purity of the slurry is ensured.

The application relates to the papermaking technical field, in particular to a high-barrier food packaging paper and a production process thereof. The application aims to solve the problem of how to reduce the cost while improving the barrier performance of the packaging paper. To this end, the production process of the high-barrier food packaging paper can reduce the fiber size, improve the fiber dispersion uniformity, strengthen the internal structure of the packaging paper and improve the barrier performance of the packaging paper by homogenizing the primary fiber slurry. In addition, the secondary fiber slurry, sodium alginate sol, alkyd resin and talcum powder are used as raw materials, the production cost is reduced, the barrier performance of the food packaging paper is improved, the oil resistance of the packaging paper is improved, and the tensile strength and breaking strength of the packaging paper are also improved.

The utility model belongs to the technical field of carbon fiber processing, and discloses a carbon fiber sizing device. The stirring structure comprises stirring rods rotationally connected to the inner wall of the box body and distributed in a linear array and three belt pulleys A located on the front face of the box body and fixedly connected with one ends of the three stirring rods, and a belt pulley B is installed on the front face of the belt pulley A located in the middle. Through the design of a stirring structure, a roller structure and a drying structure, a servo motor is started to drive pressing rollers to start to rotate, synchronous rotation of the two pressing rollers is achieved under close fit of a belt pulley D and a belt pulley C, finally power is transmitted to a belt A and three belt pulleys A, a stirring rod rotates in a box body, and drying is achieved. The slurry in the box body is stirred, a high-quality soaking environment is provided for infiltration of the carbon fibers, after the slurry is uniformly stirred, the carbon fibers are pressed into the box body by the pressing rod to be fully soaked, and in the advancing process of the carbon fibers, the carbon fibers are in contact with the scraping plate, so that the redundant slurry is scraped off.

The application discloses a double-layer micro-nano fiber fabric with a daytime cooling function and a preparation method thereof. Micro-nano fiber yarn is prepared through micro-nano fiber spinning technology, and then the micro-nano fiber yarn is knitted into a double-layer micro-nano fiber fabric. In the double-layer micro-nano fiber fabric, the warp yarns of the lower fabric correspond to the gaps between two adjacent warp yarns in the upper fabric, and the weft yarns of the lower fabric correspond to the gaps between two adjacent weft yarns in the upper fabric. The upper fabric has hydrophilicity, high mid-infrared emission and high thermal conductivity, and the lower fabric has hydrophobicity, high mid-infrared emission and high thermal conductivity. The lower fabric contains hydrophilic contact points. The special double-layer fabric structure design, micro-nano fiber size structure distribution and material-specific radiation cooling performance make the fabric integrate multiple cooling paths such as daytime radiation cooling, evaporation heat absorption and heat conduction, which not only helps to improve the cooling performance, but also is soft and wearable, and can be applied to human body cooling under outdoor strong sunlight irradiation conditions.

The invention belongs to the technical field of railway track supporting, and particularly relates to a preparation process of a plant fiber cement railway sleeper, which comprises the following specific steps: selecting plant fibers, screening out fibers with the length of 0.3-3 cm and the diameter of 0.05-3 mm according to requirements, removing impurities, grading by a vibrating screen, and ensuring that the sizes of the fibers are uniform; the plant fiber cement sleeper with the density of 1.2-1.6 g / cm < 3 > can be prepared by mixing the plant fibers with the cement and performing semi-dry compression molding, and the novel composite material sleeper with long service life and excellent elasticity can be prepared by combining the characteristics of the plant fibers and the cement material; the plant fiber reinforced cement sleeper is lighter than a traditional steel bar material, and the material is easy to obtain; a semi-dry method is used for high-pressure compression molding, and compared with a pouring process, a final product is higher in strength, a bleeding channel is more uniform, and the surface is free of bubbles; a high-filling plant fiber scheme is adopted, so that carbon sequestration can be carried out.

Filter media, methods of manufacture, and filters are disclosed. The filter media includes thermally cleavable fibers to reduce the fiber size of at least some components of the fibers within the filter media. This reduced fiber size increases the overall efficiency of such filters to capture contaminants, particularly those contaminants having a size ranging from about 0.1 to about 10 microns, without compromising other important characteristics of the filter. The filter media includes one or more bicomponent fibers, each bicomponent fiber having a first component and a second component. The first component includes a thermoplastic elastomer material and a thermoplastic material and has a higher shrinkage ratio / percentage / rate than the second component such that at least a portion of the first component is separated from the second component upon application of heat or thermal energy to the fiber.

This disclosure describes meltblown methods, assemblies, and systems for polymer production. In one such implementation, a meltblown system provides improved uniform output and reduction of fiber size given certain polymer material and production rate. In certain meltblown implementations, the equipment may be ready and quickly swapped while provided in hot standby mode such that the maintenance down time is minimized. The disclosed meltblown equipment may include a polymer beam and air chamber and a die tip assembly. The die tip assembly, in certain embodiments, may quickly be attached onto or removed from the polymer beam and air chamber. In preferred embodiments, the meltblown system includes a single input (e.g., a specific type of polymer material). The meltblown system includes some tapered structures that facilitate polymer flow. The assembly mechanisms used in the meltblown system enables cleaning of the polymer distribution components with each use.

The utility model discloses carbon fiber sizing equipment. The carbon fiber sizing equipment comprises a sizing tank and a filtering assembly arranged in the sizing tank, a slurry outlet is formed in one end of the sizing tank, and an overflow port is formed in the other end of the sizing tank; the filtering assembly is located behind the soybean milk outlet and in front of the overflow opening. Impurities in the sizing tank can be effectively removed, and the carbon fiber quality and the production efficiency are improved.

The invention discloses a carbon fiber reinforced bismaleimide resin composite material and a preparation method thereof, belongs to the technical field of carbon fiber sizing agents, and solves the problems of relatively low interlayer shear strength and bending strength of a carbon fiber composite material in the prior art. According to the carbon fiber reinforced bismaleimide resin composite material, sizing carbon fibers are prepared through a specific sizing agent, the mechanical property of the sizing carbon fibers can be remarkably improved, and then the sizing carbon fibers are used for preparing the carbon fiber reinforced bismaleimide resin composite material through a specific method. The prepared carbon fiber reinforced bismaleimide resin composite material has high interlaminar shear strength and bending strength.

The present disclosure pertains to: polyamide fibers for an airbag which are characterized in that the fiber size thereof is 200-800 dtex, inclusive, and the stress retention rate thereof when obtained using a prescribed procedure is at least 3.0%; and a method for producing said polyamide fibers for an airbag, the method being characterized in that during the thermosetting step and the relaxing step thereof, the contact time between thread and a roller which is at least 190° C. is at least 30 msec and less than 110 msec, the temperature of the thermosetting roller is 190-205° C., inclusive, the temperature of the relaxing roller is greater than 100° C. and less than 190° C., and the speed ratio of the relaxing roller to the thermosetting roller satisfies this equation: 1.00<relaxing roller speed / thermosetting roller speed<1.10.

The present invention aims to provide a fiber bundling agent composition that exhibits excellent bundling and unbundling properties, produces fiber bundles with minimal fluffing, provides high adhesion between the fibers and the matrix resin, and has excellent storage stability. [Solution] A fiber sizing agent composition comprising a compound having a urethane group (A), a polyester resin (B), a bisphenol A type epoxy resin (C), and a nonionic surfactant (D), wherein the number average molecular weight of the compound having a urethane group (A) is 1000 to 10000, the compound having a urethane group (A) is water-insoluble, and the polyester resin (B) is composed of a diol component (b1) and a dicarboxylic acid component (b2), and 5 to 100% by weight of the diol component (b1) is a bisphenol A alkylene oxide adduct (b11).

The invention provides a sizing agent for carbon fibers, a preparation method of the sizing agent and a method for sizing the carbon fibers, the sizing agent for the carbon fibers comprises 20-60 parts by weight of modified epoxy resin, 1-20 parts by weight of an emulsifier and 50-300 parts by weight of deionized water, the modified epoxy resin is prepared by reacting first epoxy resin with a curing agent and a first catalyst, the emulsifier is prepared by grafting epoxy resin with a hydrophilic chain segment PEG (Polyethylene Glycol). By adopting the sizing agent for the carbon fibers, the shear strength of a material interface can be improved.

The invention discloses a carbon fiber epoxy waterborne sizing agent and a preparation method thereof, and belongs to the technical field of composite materials. The carbon fiber sizing agent disclosed by the invention is prepared from the following components in parts by weight: 100 parts of epoxy resin, 10-25 parts of an emulsifier, 1-5 parts of fatty alcohol-polyoxyethylene ether, 1-3 parts of nano silicon dioxide and 100-300 parts of deionized water. The thermoplastic polyaryletherketone resin is introduced into the molecular structure of the emulsifier, so that the toughness of the epoxy resin can be improved, and the water absorption rate of the carbon fiber is reduced. The average particle size of the epoxy sizing agent is 150 nm or below, the epoxy sizing agent has good wettability to carbon fibers, and the highest shear strength of a composite material short beam prepared from the carbon fibers treated by the sizing agent reaches 100 MPa.

The invention discloses a low-temperature RTM forming method for a high-temperature-resistant composite material wedge, and belongs to the technical field of manufacturing of resin-based composite material parts. The low-temperature RTM forming method comprises the following steps: preparing a steel tool and a carbon fiber sizing fabric loaded with a sizing agent; carrying out blanking and pre-forming to obtain a sharp-corner core material, placing the sharp-corner core material in a core mold laying and transferring mold, laying a sizing fabric layer by layer, and carrying out vacuum pre-compaction on every two layers to obtain a pre-formed body; and compacting the preformed body by an autoclave, assembling the compacted preformed body to an RTM forming mold, closing the mold, injecting glue, curing, and demolding to obtain the high-temperature-resistant composite material wedge. According to the manufacturing method, through combination of the split tool and the RTM process, high-precision integrated manufacturing of the complex wedge structure is achieved; by adopting a polybenzoxazine system, the forming temperature is remarkably reduced, production can be carried out through conventional equipment, and the product is high in size precision and good in surface quality and can meet the requirements for high temperature resistance and weight reduction of an aircraft cabin tail area.

The invention provides a continuous directional fiber sizing device and method based on airflow division-electrostatic spraying coupling, and relates to the field of fiber composite material preparation, the continuous directional fiber sizing device comprises a liquid storage circulating system, a liquid storage circulating system, a liquid storage circulating system and a liquid storage circulating system, the liquid storage circulating system comprises an upper liquid storage tank, a lower liquid storage tank and a backflow device; the atomization and filament separation synergistic spray head is connected to the lower part of the upper liquid storage tank and comprises a high-voltage electrostatic atomization system and a high-pressure gas device; the high-voltage electrostatic loading power supply is used for forming an upper high-voltage electrostatic loading layer on a nozzle of the high-voltage electrostatic atomization system and forming a lower high-voltage electrostatic loading layer above the surface of the lower liquid storage tank, so that an electrostatic field area for fiber bundles to pass through is formed between the upper loading layer and the lower loading layer; the fiber transmission and post-processing system comprises an unwinding and wire feeding device, a bundling device and a winding device which are sequentially arranged in the fiber advancing direction. According to the sizing agent, the problems of fiber fluffing and fiber breakage in the fiber separation process are effectively avoided, fiber damage is remarkably reduced, and the covering uniformity of the sizing agent and the bonding performance of the sizing agent and the fibers are fundamentally improved.

The invention relates to a sizing method based on fiber size allowance control, belongs to the technical field of fiber sizing, and solves the problems of non-uniform fiber sizing thickness and size waste in the prior art. The sizing method comprises the steps that S1, the lifting mechanism moves the fiber sizing mechanism downwards into the sizing tank; s2, aramid fibers are conveyed to a fiber sizing mechanism through a fiber feeding mechanism, and fiber tows are guided into a sizing tank for sizing; during sizing, the aramid fibers are transversely stretched in a reciprocating mode through the fiber sizing mechanism, so that fiber tows are infiltrated by size; s3, the fiber sizing mechanism is moved out of the sizing pool, the fibers are transversely and longitudinally stretched through the fiber sizing mechanism, and meanwhile the aramid fibers are extruded by a guide roller shaft to remove redundant size; and S4, winding the sized aramid fibers through a fiber winding mechanism. According to the invention, dynamic sizing of aramid fibers and dynamic control of the sizing amount are realized.

This application provides a sizing agent and its preparation method, carbon fiber, and composite materials, belonging to the technical field of carbon fiber sizing agents. The sizing agent is in emulsion form and includes a main sizing agent and water. The main sizing agent comprises the following components by weight: 80-120 parts of phenolic epoxy resin, 100-150 parts of epoxy vinyl resin, and 10-20 parts of surfactant. By simultaneously adding phenolic epoxy resin and epoxy vinyl resin to the sizing agent, this application improves the heat resistance and wear resistance of the sizing agent-treated carbon fiber through the synergistic effect of the two resins, making it suitable for use in high-temperature environments. Furthermore, the sizing agent-treated carbon fiber exhibits strong interfacial bonding strength with thermosetting matrix resins such as epoxy resin, phenolic resin, and vinyl resin, demonstrating strong versatility. The sizing agent also exhibits good stability and good wettability to carbon fiber, resulting in a wide range of applications.