14results about How to "Reduce fuzz" patented technology

The invention discloses a preparation method of a regenerated colored polyester fiber, the regenerated colored polyester comprises regenerated polyester and pigment, the preparation method comprises the following steps: melting the regenerated colored polyester to obtain a regenerated colored polyester melt, the regenerated colored polyester fiber is prepared from the regenerated colored polyester melt through metering, spinneret plate extrusion, cooling, oiling, stretching, heat setting and winding, and an oil agent adopted in the oiling step at least comprises mineral oil and iso-tridecanol polyoxyethylene ether. According to the invention, the static friction coefficient mu s and the dynamic friction coefficient mu d are adjusted through the oil agent to obtain the cohesive force suitable for the fiber, so that the wear resistance of the fiber is improved, broken filaments generated by breakage of the fiber in the spinning process are reduced, and the machinability of the fiber is improved.

The invention relates to a preparation method of carbon fibers suitable for woven fabrics, and belongs to the field of carbon fiber production. The preparation method comprises the following steps: polymerizing acrylonitrile and a comonomer in a dimethyl sulfoxide solution, separating the monomer, removing gas mixed in a polymerization solution, solidifying and forming into a solidified filament by adopting a wet or dry-wet spinning process, drafting, washing the solidified filament with water, drafting in hot water, oiling the washed and drafted solidified filament, and drying, thereby obtaining the high-strength and high-toughness polyester fiber. The preparation method comprises the following steps: preparing monofilaments, drying and densifying by using a hot roller, drafting the monofilaments by using saturated water vapor, carrying out heat setting on the fibers by using saturated water vapor, collecting the protofilaments to obtain the protofilaments, carrying out oxidation treatment on the protofilaments, carrying out low-temperature carbonization treatment on the pre-oxidized filaments, and carrying out high-temperature carbonization treatment on the filaments subjected to low-temperature carbonization treatment, constant current is applied to the filaments subjected to high-temperature carbonization treatment in an electrolytic solution for surface treatment, washing and sizing are conducted, then the filaments are dried, the dried fibers are subjected to secondary finishing, and the finished carbon fibers are obtained after the carbon fibers are wound.

According to the present application, there are provided a quartz glass cloth constituted by a glass yarn having a high content of silicon dioxide (SiO2) and having less fuzz, and a prepreg and a printed circuit board, etc. containing the same. The glass cloth of the present application is constituted by a glass yarn containing a plurality of filaments as warp and weft, and the content of silicon (Si) of the glass yarn is 95.0 mass% or more and 100 mass% or less as converted into silicon dioxide (SiO2). The thickness (T) of the glass cloth is 80 μm or less, and satisfies {number of warp bundle segments (N) - 0.2} / thickness (T) [μm] < 0.056.

The utility model discloses an engineering seat anti-skid wear-resistant seat surface material, which comprises an anti-skid layer, an enhancement layer, a shock absorption layer and an absorption layer, the upper surface of the anti-skid layer is provided with a bionic shark layer structure, the shock absorption layer is internally provided with a plurality of elastic pieces, the shock absorption layer is internally filled with magnetorheological fluid, the absorption layer is internally provided with a silica gel honeycomb block, and the silica gel honeycomb block is filled with a plurality of elastic pieces. A reinforcing band is arranged in the absorbing layer, and the reinforcing band is filled with polyurethane foam. According to the device, the stability of the static friction coefficient is improved by arranging the bionic shark layer structure, the surface is durable and wear-resistant, scratches and fuzzing are reduced, and by means of hexagonal elastic deformation when the silica gel honeycomb block is pressed, the viscosity of magnetorheological fluid, damping vibration of polyurethane foam in the reinforcing band through a closed-cell structure, elastic deformation of an elastic piece and deformation of an air capsule, the stability of the static friction coefficient is improved. A multi-stage damping mechanism is formed to absorb vibration, local pressure can be dispersed to the whole absorption layer, and the excellent compression resilience performance is achieved.

The present invention relates to the technical field of aramid production, and specifically to a liquid crystal spinning method for heterocyclic aramid fiber, wherein the spinning method is as follows: S1, preparation of heterocyclic aramid polymer powder: diamine monomer, third monomer and terephthaloyl chloride are subjected to polymerization reaction in a twin-screw polymerization reactor, and after the reaction, the powder is neutralized, ground, washed and dried with an alkaline substance to obtain a heterocyclic aramid polymer powder; S2, preparation of heterocyclic aramid fiber: the heterocyclic aramid polymer powder is dissolved, filtered and degassed with concentrated sulfuric acid to obtain a liquid crystal spinning solution, and then subjected to a dry-jet wet spinning process: spinning, coagulation molding, washing, neutralization, washing, drying and heat drawing to obtain the heterocyclic aramid fiber; the neutralizer used in the neutralization process of step S2 is a weak alkali aqueous solution. The heterocyclic aramid fiber obtained by the spinning method of the present invention has higher mechanical properties, less lint and good softness, and can meet the application requirements of aerospace.

The invention provides a polyacrylonitrile precursor, a carbon fiber and a preparation method thereof. The preparation method of the polyacrylonitrile precursor adopts wet spinning and comprises the steps of coagulating bath and hot water drafting, the hot water drafting at least comprises three times of hot water drafting, the swelling degree of the fiber after the second time of hot water drafting is 110-155%, and the total drafting multiplying power of the hot water drafting is 1.5-6.5 times. The modulus of the polyacrylonitrile precursor is 130 to 160 cN / dtex; the breaking strength of the polyacrylonitrile precursor is 5.80 cN / dtex to 6.50 cN / dtex; the average number of broken filaments per 10000 meters of the polyacrylonitrile precursor is not more than 15; the dispersion coefficient of the fineness of the polyacrylonitrile precursor is 3-5. The invention has the advantages of oil demulsification, less deterioration, high mechanical properties of the precursor, small fineness dispersion coefficient, and less broken filaments and broken filaments in a graphitization furnace.

The invention discloses a preparation method of a carbon fiber suitable for a winding process. The method comprises the following steps: S1, polymerizing: polymerizing acrylonitrile and a comonomer in a dimethyl sulfoxide solution; s2, monomer removal and defoaming: separating residual acrylonitrile monomers in the polymerization liquid from a system under a vacuum condition to obtain a stable spinning solution; the spinning solution is output through a spinning metering pump, flows through a buffer, enters a spinneret plate assembly and then is sprayed out, a dry-wet spinning process is adopted, and the spinning solution enters a solidification solution to be solidified and formed into solidified filaments; s4, water washing, S5, hot water drafting, S6, oiling and drying densification, S7, steam drafting, S8, heat setting, S9, protofilament collection, S10, pre-oxidation, S11, low-temperature carbonization, S12, high-temperature carbonization, S13, surface treatment, S14, sizing and S15, carbon fiber rolling. The production process of the carbon fibers is controlled, the carbon fibers with few broken filaments and good abrasion resistance are formed, and production of a winding process is facilitated.

The invention relates to the technical field of reverse osmosis, and discloses a method for preparing a glass fiber layer of a reverse osmosis membrane element. The method is carried out in a winding device for a reverse osmosis membrane element, and comprises the following steps: infiltrating glass fiber gridding cloth in a sealant to obtain glass fiber gridding cloth I, and winding the glass fiber gridding cloth I to enable the glass fiber gridding cloth I to be wound on the surface of the reverse osmosis membrane element; the mesh size of the glass fiber gridding cloth is not larger than 100 mm < 2 >, the gram weight is not larger than 500 g / m < 2 >, and the mesh diameter is not larger than 3 mm; the winding treatment conditions at least comprise that the number of winding turns is 4-7, the winding speed is 5-20 rpm, and the temperature is 10-30 DEG C. The glass fiber gridding cloth with specific parameter types is continuously wound on the outer layer of the reverse osmosis membrane element after being soaked in the large-width glue tank, and the method has the advantages of being easy to operate, short in processing period, high in efficiency and controllable in quality.

The present invention discloses a high-thermal-conductivity and high-modulus carbon fiber fabric and a preparation method thereof. By controlling the surface roughness of a constraint path through which fibers pass in a high-thermal-conductivity and high-modulus carbon fiber weaving device, the roller radius of a fiber contact portion, the curvature radius of a wire guide hole, etc., the wear of high-modulus fibers during weaving and the generation of excessive bending angles are reduced, and the generation of broken and fuzzy fibers is reduced, thereby achieving successful weaving of high-thermal-conductivity and high-modulus carbon fibers while ensuring a high performance retention rate of the fibers.

The invention discloses a hollow three-dimensional crimped fiber with a high compression resilience rate and a preparation process, and relates to the field of fibers, and the hollow three-dimensional crimped fiber comprises the following raw materials by weight: 50-100 parts of bottle flakes; 10 to 50 parts of a soaking material; 5-15 parts of modified zinc oxide; 1 to 5 parts of styrene-methyl methacrylate resin; the modified zinc oxide is prepared from the following raw materials: zinc oxide, polyvinylpyrrolidone, water, chitosan and N, N-dimethylformamide. The compression resilience of the three-dimensional crimped fiber is improved.

The invention relates to a cloth after-finishing agent and wear-resistant antibacterial cloth prepared from the cloth after-finishing agent. The cloth after-finishing agent is prepared from the following components in percentage by weight: 40%-60% of VAE emulsion, 5%-8% of a zinc oxide solution, 10%-20% of heavy calcium carbonate, 0.3%-1% of a defoaming agent, 0.3%-1% of a dispersing agent, 0.5%-2% of a thickening agent and the balance of water. The wear-resistant antibacterial cloth is prepared by taking cloth as a base material and coating the surface of the base material with an after-finishing agent. The cloth after-finishing agent is convenient to produce and low in cost, and a formed coating layer has good low-temperature film-forming property. The ultra-thin coating on the surface of the wear-resistant antibacterial adhesive tape can have certain antibacterial and bacteriostatic effects under the condition that the breathability and comfort degree are not affected, the problem that cotton products are mildewed and damaged is effectively solved, meanwhile, the appearance with good hand feeling and luster is provided, the problem that traditional cloth is poor in wear resistance is solved, and the wear-resistant antibacterial adhesive tape has good application prospects. The bandage can be applied to the fields of repeatedly used bandages (such as Chinese zither finger bandages) and the like.

The invention discloses a carbon fiber sizing agent and a preparation method and application thereof, particularly relates to the technical field of carbon fiber sizing agents, and is characterized in that the carbon fiber sizing agent is prepared from epoxy resin and auxiliaries, the epoxy resin is at least one of bisphenol A epoxy resin or phenolic aldehyde modified epoxy resin, and the auxiliaries are epoxy resin. The auxiliaries comprise a flexibilizer, a soaking agent, a softening agent, a moisture absorbent and an emulsifier, the flexibilizer is one or more of polyether polyol or hydroxyl-terminated polybutadiene, the soaking agent is a nonionic surfactant, the softening agent is one or more of fatty acid ester or fatty acid amide, and the moisture absorbent is one or more of polyisobutylene or polyisobutylene. The moisture absorbent is one or more of glycerol or sorbitol, the emulsifier is a nonionic surfactant, the concentration of the sizing agent is easy to control, the binding force between the sizing agent and the carbon fiber surface is strong, and the compatibility between the sizing agent and a resin matrix is good.

The present invention relates to the technical field of polymer materials, and discloses a polyamide fiber and a preparation method thereof, which comprises: (a) directly feeding a polyamide 5X melt into a spinning manifold through a melt booster pump, or heating a polyamide 5X resin to a molten state to form a polyamide 5X melt and feeding it into a spinning manifold; (b) accurately metering the polyamide 5X melt through a metering pump, and then ejecting it through a spinneret to form a melt stream, while using saturated superheated steam, slow cooling and a monomer suction device to remove oligomers, and then cooling, oiling and winding to obtain the polyamide fiber. The present invention adds a saturated superheated steam device, a slow cooling device and a monomer suction device to reduce oligomers in the spinning process, increase the component shoveling cycle, and reduce the number of broken wires. The obtained polyamide fiber has less hair, low fiber unevenness, less dyeing dark lines, good dyeing effect, and has excellent elongation at break, breaking strength, and low boiling water shrinkage.

The utility model discloses shearing equipment for a carbon fiber braid for reinforcing a composite material, which comprises a shearing machine main body, a discharging roller, a cutting roller and a driving roller are arranged on the shearing machine main body, a cutter is arranged on the surface of the cutting roller, and a dust collection mechanism is arranged at the lower end of the cutting roller; a cooling mechanism is arranged on the shearing machine body, the dust collection mechanism comprises a dust collection cover, a filter box and an air blower, the dust collection cover is located at the lower end of the cutting roller, a flow guide cover is arranged at the upper end of the dust collection cover and arranged at the outer end of the cutter in a sleeving mode, the filter box is installed in the dust collection cover, and the air blower is connected with the bottom of the dust collection cover in a penetrating mode. According to the carbon fiber braid cutting device, the dust collection mechanism is arranged at the lower end of the cutter, and fiber chippings generated in the cutting process are sucked into the filter box through the dust collection mechanism, so that the situation that the chippings are mingled in a carbon fiber braid, and the final product quality is affected is avoided.