41results about How to "Good fiber opening effect" patented technology

Provided is a fiber sizing agent capable of imparting sufficient sizing properties and fiber spreading properties to reinforced fiber bundles for producing fiber-reinforced composite materials. A fiber sizing agent composition (E) which contains a fiber sizing agent (A), said fiber sizing agent having a viscosity at 35oC of 50-3,000 Pas, and has a thixotropic index of 3-15. As the sizing agent (A), an epoxy resin, a polyester rein, a polyurethane resin, a polyether resin and a vinyl ester resin are preferred.

The present invention pertains to a cellulose fiber in which some of the hydroxyl groups of the cellulose are substituted with carboxyl and / or formyl in an amount of 0.1mmol / g or more relative to the weight of the cellulose fiber and are further substituted with a chemically modifying group other than carboxyl and formyl.

The invention provides a glass fiber impregnating compound. The glass fiber impregnating compound comprises a coupling agent, a lubricant, an unsaturated polyester emulsion, a polyvinyl acetate emulsion, an epoxy emulsion, a polyurethane emulsion, a pH value regulating agent and water. The content of each of the above components is studied in the invention. The glass fiber impregnating compound provided by the invention can change the physical and chemical properties of the surface of glass fiber, effectively improves the flowability and splitting performance of the glass fiber, and enhances the compatibility of the glass fiber with matrix resin; and a prepared SMC product has the characteristics of uniform glass fiber distribution, a smooth surface without lines, good mechanical properties, etc. The invention also provides application of the glass fiber impregnating compound to manufacturing of grid beams.

The invention discloses a water-based-epoxy sizing agent and a preparing method thereof. The water-based-epoxy sizing agent is prepared from, by weight, 100 parts of epoxy resin, 10-30 parts of a hyperbranched emulsifying agent, 1-5 parts of an auxiliary emulsifying agent, 1-5 parts of a dispersing agent and 100-300 parts of deionized water. A hyperbranched structure of a modified epoxy emulsifying agent has a large quantity of holes, the holes are added into the epoxy resin, the viscosity of a system can be reduced, and the grain size of emulsion can be decreased in the phase transformation process to improve wetting of the sizing agent to the surface of a carbon fiber. According to the water-based-epoxy sizing agent and the preparing method thereof, the solvent problem caused by the large viscosity in a traditional emulsification epoxy process is solved, the grain size of the sizing agent prepared with the method is 200 nm or below, the sizing agent can be evenly spread on the surface of the carbon fiber, and the carbon simultaneously has good bundling and splitting properties accordingly. The interlaminar shear strength of an epoxy composite material prepared from the carbon fiber sized through the sizing agent can be 70 MPa or above.

The invention provides a production method of dustless cloth with high shrinkage and high dust removing efficiency as well as the produced dustless cloth. The production method comprises the following main steps: polyester / nylon superfine fiber yarns are woven to gray cloth by using a knitting machine; the gram weight of the produced gray cloth is 130-180 g / m2; the gray cloth is poured in a dye vat by the bath ratio of 1: 5-7; penetrating agent, sodium hydroxide, EDTA-4Na and degreasing agent are added in the dye vat; the gray cloth is cleaned in a manner of discharging while washing; acetic acid is added for cleaning again; splitting agent is added for treating, and the cleaning is performed; soaping agent is added; and the gray cloth is cleaned again in the manner of discharging while washing. According to the production method of the dustless cloth with high shrinkage and high dust removing efficiency provided by the invention, the produced dustless cloth has excellent absorbability and good dust and dirt removing effect.

The invention provides a ramie biological degumming device, which includes a ramie peeling machine, a ramie stalk grinder, a ramie biological degumming tank, a ramie stalk dissolving pool, an anaerobic bioreactor, a nutrient pool, an outlet water alkalinity adjustment pool, and biogas storage tank; the discharge port of the ramie stripping machine is connected with the feed port of the ramie biological degumming tank, the waste of the ramie stripping machine is connected with the ramie stalk grinder, and the output of the ramie stalk grinder is stored in the water outlet The alkalinity dissolution pool, the ramie stalk dissolution pool is connected to the water inlet of the anaerobic bioreactor, the nutrient pool is connected to the water inlet of the anaerobic bioreactor, the external circulation port of the anaerobic bioreactor is connected to the inlet of the ramie biological degumming tank The water port is connected, the exhaust port of the anaerobic bioreactor is connected to the biogas storage tank, the water outlet of the ramie biological degumming tank is connected to the water inlet of the anaerobic bioreactor, and the water outlet of the anaerobic bioreactor is connected to the effluent alkalinity adjustment tank connect. The invention has the advantages of environmental protection, low cost and simple process.

The invention provides a method for preparing an ultra-thin continuous fiber reinforced thermoplastic prepreg, which includes processing a metal mold with a micro-cone hole array feature, remanufacturing a fiber-spread board with a micro-cone protrusion array feature, and initial opening of an ultra-thin fiber cloth. Vibration dusting of fiber and matrix resin powder, second fiber opening, first turning to even powder, second turning to mold conversion, vacuum heating and melting and hot pressing. An array of tapered holes is processed on the surface of the metal mold, and the high-performance thermoplastic PEEK resin sheet is used to reproduce the fiber-spreading board with the characteristics of a micro-conical protrusion array, so as to realize the full fiber-opening and fiber-opening effect of the ultra-thin continuous reinforced fiber cloth. Good; with the three-coordinate movable nozzle with controllable flow and two high-frequency and low-amplitude vibration dusting of the expanded fiberboard, the matrix resin powder can be evenly distributed inside the reinforced fiber cloth, which effectively solves the problem of the penetration of the molten resin matrix into the continuous fiber. Difficult problems within the bundle.

The invention discloses a mechanical opening machine for producing polyester nylon ultrafine fiber dust-free cloth, and relates to the field of dust-free cloth opening equipment. It includes an obliquely arranged cylinder. The lower end of the cylinder is provided with an upwardly bent elbow. The circumference of the elbow is provided with a cloth inlet pipe connected to it. The opening of the cloth inlet pipe is provided with a sealing cover. The inside of the elbow is The cloth lifting roller is installed horizontally and rotates, and the outer wall of the elbow is provided with a driving device to drive the rotation of the cloth lifting roller; the inside of the elbow is fixedly connected with a nozzle, and the inside of the cylinder is provided with a cloth running pipe along its axis, and one end of the cloth running pipe extends To the inside of the elbow and communicate with the nozzle; the circumference of the cylinder is provided with a water inlet pipe, the bottom of the cylinder is provided with a drain pipe, the circumference of the elbow is provided with a water spray pipe connected to the nozzle, and the bottom of the cylinder is provided with A circulation pump is arranged between the water return pipe, the water spray pipe and the water return pipe, and a heat exchange device is arranged around the water spray pipe. The invention has the advantages of good fiber opening effect, low fiber weight loss rate and reduced waste water discharge.