35results about How to "Less fuzz" patented technology

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 water to 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 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 applied to 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 carbon fiber water-soluble epoxy resin sizing agent and a preparation method thereof. The sizing agent comprises main slurry and deionized water as main components, wherein the mass ratio of the main slurry to the deionized water is (50-80):(20-50); and the main slurry consists of modified phenol-formaldehyde epoxy resin and allyl polyoxylethylene ether (AEPH), and the mass ratio of the modified phenol-formaldehyde epoxy resin to AEPH is (60-90):(10-40). The preparation method of the sizing agent comprises the following steps: firstly reacting phenol-formaldehyde epoxy resin with diethanolamine to obtain water-soluble phenol-formaldehyde epoxy resin; and then mixing the water-soluble resin with AEPH in proportion, and performing dilution to reach a certain concentration by using the deionized water to obtain the sizing agent. The sizing agent disclosed by the invention is good in stability and low in cost, cannot cause environmental pollution, and is simple in preparation method; good post-processing performance of carbon fibers can be provided by adding flexible molecular AEPH; experiments show that after the carbon fibers are coated with a proper amount of the sizing agent, the post-processing performance can be significantly improved; and the performance of a carbon fiber epoxy resin composite material can be improved.

The invention discloses a thermoplastic emulsion sizing agent for carbon fiber. The thermoplastic emulsion sizing agent comprises main pulp, an emulsifying agent, an organic solvent and deionized water. The main pulp is Acrylonitrile-Butadiene-Styrene (ABS) formed by modifying N-Phenylmaleimide-Styrene-Maleic anhydride (NSM). And the mass ratio of the ABS and the NSM is 50-100:0-50. The mass of the emulsifying agent accounts for 10-40% the mass of the main pulp, the mass of the main pulp accounts for 0.5-1.5% the mass of the organic solvent, and the mass of the main pulp accounts for 0.5-1% the mass of the deionized water. The invention further discloses the preparation method of the sizing agent and the application of the sizing agent. The sizing agent is good in stability, low in environmental pollution and simple in preparation method. The NSM can assist a carbon fiber rubber layer generated after sizing is conducted in keeping better completeness in the composite material hot press molding process. It is tested by experiment that the post-processability of the carbon fiber is obviously improved after the carbon fiber is processed through the sizing agent, and the inter-laminar shear strength (ILSS) of the carbon fiber reinforced ABS composite material is obviously improved as well.

The invention discloses a pre-oxidation furnace. The pre-oxidation furnace comprises a furnace body shell, a roller, a circulating fan and an exhaust fan, wherein the circulating fan and the exhaust fan are connected with the furnace body shell by virtue of connecting pipelines, two ends of the furnace body shell are provided with furnace end humidifying devices, a humidifying pipe is arranged inside each furnace end humidifying device, a humidifying hole is formed in the humidifying pipe, and each humidifying pipe is connected with a humidifying liquid storage tank by virtue of a connecting pipeline. Two ends of the pre-oxidation furnace are provided with the furnace end humidifying devices, so that in the pre-oxidation production process, the mechanical abrasion and damage of carbon fibers can be greatly reduced, the quantity of broken filaments on the surface of the carbon fibers can be greatly reduced, a pre-oxidized filament obtained by pre-oxidizing carbon fiber crude filaments by virtue of the pre-oxidation furnace basically has no skin-core structure or has a slightly skin-core structure, the tensile strength and the tensile elastic modulus of the carbon fibers prepared by carbonizing the pre-oxidized filament are greatly improved, and the carbon fibers are not prone to break.

The invention discloses a small silk bundle universal carbon fiber sizing agent as well as a preparation method and application of the small silk bundle universal carbon fiber sizing agent. The small silk bundle universal carbon fiber sizing agent comprises the following components: bisphenol A epoxy resin, aliphatic binary monounsaturated acid of which both end groups are carboxyl, an aliphatic reactive diluent of which a molecule comprises one epoxy group, a hydroquinone polymerization inhibitor and a quaternary ammonium bromide catalyst. The small silk bundle universal carbon fiber sizing agent disclosed by the invention is applicable to sizing of industrial 1K-12K small silk bundle carbon fiber, the number-average molecular weight of a reaction product is 2500-2700, sized carbon fiber has good interface bonding strength with thermosetting resin matrixes such as epoxy resin, phenolic resin and bismaleimide resin, is good in universality, and is particularly remarkably improved in interface bonding strength with the epoxy resin and the phenolic resin.

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 the technical field of plied yarn processes, in particular to a production device and process method of plied yarn for ground retreating. The production process method of the plied yarn for external retreating on the ground comprises the following steps: rotating a raw yarn cake to a creel, firstly passing through a probe yarn guide eye on the creel, then passing through a yarn guide bar on a suspension yarn regulator, continuously passing through a stand column yarn guide eye, then passing through a yarn guide eye beam splitting wheel on the ground, and finally passing through a yarn guide eye of a winder and a V-shaped guide wheel in the horizontal direction to enter the winder; plied yarns are obtained; and the yarn enters the winder at an angle of 42 degrees through the V-shaped guide wheel. According to the production process method for the ground twisted yarn for external retreating, the use efficiency of the twisted yarn product for external retreating is improved, and the quality requirement of customers for the product is guaranteed. The invention also provides a production device.

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 relates to the technical field of thermoplastic chopped yarn production processes, and in particular, relates to an impregnating compound for thermoplastic chopped yarn production, a preparation method of the impregnating compound and a method for producing the thermoplastic chopped yarn after modification of the glass fiber filaments. Process waste generated in the glass fiber production process is chopped by a tiger's guillotine, granulated by a granulator, sprayed with the independently developed impregnating compound, dedusted by a dedusting device, finally enters a vibrated fluidized bed and is dried to finally produce the reinforced thermoplastic chopped yarn. The impregnating compound is prepared from the following raw materials in percentage by weight: 0.3-1% of a coupling agent, 1-15% of a film-forming agent A, 1-16% of a film-forming agent B, 0.6-2% of a lubricating agent, 0.05-0.3% of a cross-linking agent, 0.05-0.2% of an antistatic agent and the balance being deionized water. The preparation method of the impregnating compound is optimized. The treatment process is simple and reasonable, and the final product is clean and good in quality.