35results about How to "Less fuzz" patented technology

The invention discloses a carbon fiber emulsion sizing agent. The sizing agent comprises a main sizing agent, an auxiliary agent, an organic solvent and de-ionized water, wherein the auxiliary agent accounts for 5 to 15 percent of the mass of the main sizing agent; the mass ratio of the organic solvent to the main sizing agent is 20-50 to 50-80; and the mass ratio of the de-ionized water to the main sizing agent is 50-90 to 10-50. The invention also discloses a preparation method and application of the sizing agent. The sizing agent has low cost and environment friendliness and can be appliedto different types of resin matrixes by varying the ratio of the components in the sizing agent. The preparation method is simple to operate and easy to implement. The sizing agent can improve the processability of the carbon fiber and the mechanical property of carbon fiber-enhanced resin-based composite materials when used in carbon fiber.

The invention discloses a method for preparing a self-emulsifying carbon fiber sizing agent component, which comprises the following steps of: performing graft polymerization reaction on epoxy resin by adopting an emulsion polymerization method to prepare modified epoxy emulsion; and standing the modified epoxy emulsion at 80 DEG C for two hours, adding dropwise ammonia water into the solution after demulsification to make the solution alkaline, standing the solution at 95 DEG C in a sealing way, stirring and hydrolyzing the solution for 3 hours, taking the solution out, acidifying and neutralizing the redundant ammonia water, drying and rinsing the solution to produce modified bisphenol A epoxy resin, placing the synthesis product in the step and the bisphenol A epoxy resin into a container according to a certain weight ratio, and performing phase-inversion emulsification on the mixture at 70 DEG C to prepare a modified epoxy emulsion sizing agent component with certain solid content. The prepared carbon fiber sizing agent component has the characteristics of storage time longer than 12 months, high high-temperature stability, and high dilution stability, so that the method has huge breakthrough compared with the prior art. Carbon fibers sized by the sizing agent have high machining performance and improved inter-layer shear strength.

The invention discloses an emulsion type carbon fiber sizing agent, which comprises main size, an emulsifier, an aid and deionized water. The aid comprises a diluent and a penetrant, wherein the emulsifier is 5 to 15 mass percent of the main size, the diluent is 0 to 120 mass percent of the main size, the penetrant is 1 to 5 mass percent of the main size, and the mass ratio of the deionized waterto the main size is 50-90:10-50. The invention also discloses a preparation method and application of the sizing agent. The sizing agent is suitable for unsaturated polyester resin and solves the problem of poor adhesion of the unsaturated polyester resin and the carbon fiber. After the sizing agent is used for sizing, the wear resistance of the carbon fiber is improved, and the broken filament amount is reduced, the post-processing performance of the fiber is improved, the interface adhesion of the carbon fiber and matrix resin is better, the shear strength between layers is improved, and the performance of composite materials is also improved.

The invention discloses a temperature-resistant type emulsion sizing agent for a carbon fiber. The temperature-resistant type emulsion sizing agent comprises the following materials: main size, an emulsifying agent, an additive and deionized water, wherein the main size is glycidyl amine type epoxy resin modified by dodecanamine, and in modification, the mass ratio of dodecanamine to the epoxy resin is (10-40) to (60-90); the mass of the emulsifying agent is 5-15% of the mass of the main size; the additive comprises a diluting agent and a penetrating agent, the mass of the diluting agent is 0-100% of the mass of the main size, and the mass of the penetrating agent is 1-5% of the mass of the main size; the mass ratio of the deionized water to the main size is (50-90) to (10-50). The invention also discloses a preparation method and application of the sizing agent. The sizing agent disclosed by the invention is high in stability and does not cause pollution to the environment, and the preparation method is simple; in the presence of a flexible molecule, namely dodecanamine, the carbon fiber has relatively high operability; proved by experiments, after the carbon fiber is treated by the sizing agent, the post processability is obviously improved; and the interface temperature resistance and the interlaminar shear strength (ILSS) of the carbon-fiber-enhanced epoxy resin composite material are also obviously improved.

The invention discloses a system for water-washing drying, sizing and drying setting of carbon fiber. The system comprises a water-washing drying hot roller unit, a sizing system, an extruding rubber roller set and a sizing drying hot roller setting unit, the water-washing drying hot roller unit is used for drying moisture of the carbon fiber in a water-washing section and comprises a first hot roller unit and a first heating system, the sizing system is connected to the water-washing drying hot roller unit, the extruding rubber roller set is connected to the sizing system and used for extruding spare sizing agent in tows of the carbon fiber and comprises a first extruding roller and a second extruding roller in parallel arrangement, and the sizing drying hot roller setting unit is connected to the extruding rubber roller set and used for drying moisture in the sizing process and expanding silk width of the carbon fiber and comprises a second hot roller unit and a second heating system. The system saves space and can remarkably reduce broken filament amount of the carbon fiber and increase the silk width.

The invention discloses an unsaturated acid modified epoxy resin universal carbon fiber sizing agent, and a preparation method and an application thereof. The universal carbon fiber sizing agent comprises the following components: bisphenol A based epoxy resin, aliphatic binary monounsaturated acid with double end groups which are carboxyl, an aromatic active diluent containing one epoxide group in molecule, an inorganic polymerization inhibitor, and a quaternary ammonium bromide catalyst. The sizing agent is suitable for sizing 1K-12K small filament bundle carbon fiber for aerospace, the maximum decomposition peak temperature of reaction products is higher than 325 DEG C, sized carbon fiber and epoxy resin, phenolic resin, bismaleimide resin and other thermosetting resin substrates have good interface bonding strength with good versatility, and especially interface bonding strength of phenolic resin is substantially improved.

The invention relates to a waterborne self-emulsifying carbon fiber sizing agent applicable to thermoplastic resin and a preparation method thereof and belongs to the technical field of production of carbon fibers. The waterborne self-emulsifying carbon fiber sizing agent is prepared from an amphiphilic polymer A and / or an amphiphilic polymer B and de-ionized water. The preparation method comprises the following steps: dissolving the amphiphilic polymer A and / or the amphiphilic polymer B into a small amount of a proper organic solvent at a room temperature or a heating condition, and stirring by using a high-speed shearing and dispersion emulsifying machine to stir, wherein the stirring speed is 1000-25000; adding the de-ionized water until phase transferring occurs, and further stirring for 0.5-2 hours; and then carrying out rotary evaporation on the solution to remove the organic solvent to obtain the waterborne self-emulsifying carbon fiber sizing agent. The sizing agent prepared by the invention is the waterborne self-emulsifying sizing agent, has low cost and stable performances, is convenient to use, does not pollute the environment and belongs to a green environment-friendly product.

Provided is an enzymatic treatment on polyester / cellulose blend textile by contacting the textile with a cutinase and preferable with cellulose as well.

The invention discloses a macromolecular emulsifier self-emulsifying epoxy resin sizing agent for carbon fibers. The components include main slurry, macromolecular emulsifier, diluent and deionized water. The mass ratio of macromolecular emulsifier to main slurry is 10~40:60~90, the mass ratio of diluent to main slurry is 10~30:70~90, and the mass ratio of deionized water to main slurry is 50 ~90:10~50. The main slurry is a glycidyl ether type epoxy resin, and the macromolecular emulsifier is obtained by hydrophilically modifying the glycidyl ether type epoxy resin with ethanolamine, allyl polyoxyethylene polyoxypropylene epoxy ether and glacial acetic acid. The invention also discloses a preparation method and an application method of the sizing agent. The preparation method of the sizing agent is simple and easy to implement, and the flexible macromolecular emulsifier can improve the brittleness of the composite material interface. The sizing agent is used for carbon fiber and can improve the processing performance of the fiber and the mechanical properties of the carbon fiber reinforced resin matrix composite material.

The invention discloses a universal carbon fiber sizing agent for modified epoxy resin, and a preparation method and an application thereof. The carbon fiber sizing agent comprises epoxy resin, an aliphatic binary monounsaturated acid with two end groups being carboxyl groups, an aromatic active diluent with the molecule containing an epoxy group, an inorganic polymerization inhibitor and an imidazole catalyst. The sizing agent prepared in the invention is suitable for sizing 1-12 K small-filament bundle carbon fibers for aviation and spaceflight, the maximum decomposition peak temperature of a reaction product is more than 330 DEG C, and sized carbon fibers have good interface binding strength with the epoxy resin, phenolic resin, bimaleimide resin and other thermosetting resin matrixes, have strong versatility, and especially have substantially improved interface bonding strength with the bimaleimide resin.

The invention relates to a preparation method of a sizing agent for self-emulsifying waterborne epoxy resin carbon fiber and solves the technical problems that products prepared by existing methods have room for improvement in mechanical performance, are low in mechanical tensile strength, cause environment pollution and are ideal in resistance to dampness and heat. The preparation method includes following steps: synthesizing a surfactant containing epoxy functional group; synthesizing self-emulsifying waterborne epoxy resin polymer containing surfactant functional group; emulsifying the self-emulsifying waterborne epoxy resin polymer containing the surfactant functional group. The preparation method is widely used in the field of preparing the sizing agent for carbon fiber.

The invention discloses a novel sizing and shaping system for carbon fibers and a sizing technology. The sizing and shaping system comprises an upper layer sizing tank, a lower layer sizing tank, an inlet filament stretching system, an upper layer outlet filament stretching system and a lower outlet filament stretching system, wherein the upper layer sizing tank comprises a first temperature control system with a jacket, and two stainless steel polished rollers; the lower layer sizing tank is distributed in the vertical direction of the upper layer sizing tank, and the lower layer sizing tank comprises a second temperature control system with a jacket, and two stainless steel polished rollers; an inlet of the upper layer sizing tank and an inlet of the lower layer sizing tank are jointly connected with the inlet filament stretching system; the upper layer outlet filament stretching system is connected with an outlet of the upper layer sizing tank; the lower layer outlet filament stretching system is connected with an outlet of the lower layer sizing tank; the inlet filament stretching system, the upper layer outlet filament stretching system and the lower layer outlet filament stretching system each comprise two parallel supporting rollers, and bearings at the two ends of every two supporting rollers are arranged in same slide ways respectively. According to the sizing and sizing system and the sizing technology, adhesion of adjacent carbon filaments is avoided, so that the consistency of the width and sizing amount of the carbon fiber filaments is greatly improved.