37results about How to "Fast soaking speed" patented technology

The invention discloses a vacuum infusion forming method for a carbon fiber composite structure member. The method comprises the steps as follows: making a large-size carbon fiber composite wind power blade structure member by a vacuum infusion forming technology; bonding and fixing a guide net to a mould by a transparent double-sided tape for preventing deformation of carbon fiber fabrics due to deformation of the guide net to guarantee that carbon fiber sheet is consistent in orientation so as to obtain a composite structure member with higher mechanical performance; preheating a resin mixing solution with a carbon fiber preforming body at first to guarantee the resin mixing solution to be quickly infused in a low-viscosity state; and sealing the upper surface of the carbon fiber preforming body with a unidirectional breathable film to form a surface breathable channel, and enabling the resin mixing solution to permeate from surface and to fill fully under vacuum, thus completing the vacuum infusion forming process. The method is suitable for the carbon fiber fabrics which are shaped by hot melting lines and have different surface densities; and compared with the carbon fiber prepreg forming process, the method has the advantages of long material availability period, high process stability and low product cost, and is favorable for popularization and application.

The invention discloses a special size of chopped twistless roving with ultra-low resin absorbing-capacity, comprising coupling agent, lubricant, antistatic agent A, antistatic agent B, film forming agent A, film forming agent B, film forming agent C and a pH value regulator; all the materials respectively accounts for 1 to 10 percent, 1 to 10 percent, 1 to 5 percent, 1 to 5 percent, 10 to 80 percent, 80 to 10 percent, 1 to 5 percent and 0.1 to 5 percent and water as the rest; the content of the water accounts for 85 to 95 percent of the total weight of the size; the coupling agent adopts silane coupling agent, the lubricant adopts water-soluble grease lubricant, the antistatic agent A adopts organic salt substance with good water absorptivity, the antistatic agent B adopts inorganic salt substance with good water absorptivity, the film forming agent A, the film forming agent B and the film forming agent C respectively adopts one of epoxy emulsion, polyester emulsion, polyvinyl acetate (PVAc) emulsion and polyurethane emulsion; the film forming agent C selects compound with low degree of polymerization, the pH value regulator adopts acid and the pH value of the size is 3 to 11. The size can improve the penetration velocity under the situation of meeting the requirements of the chopped technique, achieves the high content of the glass fibre and ultra-low content of resin, improves the production efficiency of the client and reduces the production cost.

The invention relates to an impregnating compound for enhancing polypropylene plastic-glass fiber chopped yarn. The impregnating compound is prepared from components in percentage by total mass of theimpregnating compound as follows: 3%-22% of an acrylic emulsion, 5.0%-15.0% of epoxy modified polyester emulsion, 1.0%-5.0% of a polyvinyl acetate emulsion, 0.1%-1.0% of a lubricating agent, 0.05%-0.3% of an antistatic agent, 0.1%-0.9% of a pH regulator and the balance of deionized water. Compared with the prior art, the provided impregnating compound can have a good compatibility with polypropylene plastic resin, the plasticity and stiffness of the glass fiber are enhanced, and the impregnating compound has small static electricity and adjustable hardness, can be compatible with multiple resin, is high in resin permeation speed and good in bondability with resin and endows a composite with excellent mechanical properties.

The invention relates to a high-fiber-content fiber-reinforced rigid polyurethane foam composite board and a manufacturing method thereof; the high-fiber-content fiber-reinforced rigid polyurethane foam composite board is made from polyurethane resin and reinforcing fibers as base materials, as well as hybrid polyether polyol, a flame retardant, a rigid foam stabilizer, a coupling agent, a catalyst, a foaming agent, an antioxidant, an ultraviolet screening agent, an isocyanate, and reinforcing fibers, wherein the content of the reinforcing fibers is greater than 60%; by means of various techniques such as using low-hydroxyl value low-functionality hybrid polyether polyol and using the coupling agent, the problem that polyurethane resin is insufficiently steeped to reinforcing fibers is solved, the content of the reinforcing fibers is increased, a fiber-reinforced rigid polyurethane foam article higher than 840 kg/m<3> in density and higher than 60% in reinforcing fiber content can be manufactured, the technical blank of fiber-reinforced rigid polyurethane foam composite boards is filled, product specifications and properties are diversified, and the different technical index requirements are met.

The invention provides a glass fiber sizing agent. The sizing agent comprises a coupling agent, a lubricating agent, a film forming agent A, a film forming agent B, a pH value modifier and water, the coupling agent is one or more of silane coupling agents containing vinyl, methacrylonitrile epoxide, amidogen and epoxy groups, the film forming agent A is polyester resin emulsion, and the film forming agent B is epoxy resin emulsion, wherein the solid mass of the sizing agent accounts for 4%-12% of the total mass of the sizing agent. Different kinds of film forming agents high in content are compounded and matched with the proper coupling agent, lubricating agent and pH value modifier to prepare the sizing agent high in permeation speed and good in compatible effect. Yarn prepared through the sizing agent is soft and high in permeation speed and has excellent pultrusion performance and good resin compatibility. The invention further provides application of the sizing agent in the pultrusion process of alkali-free glass fiber reinforced umbrella frames.

The invention discloses a glass fiber impregnating compound which is prepared from, by weight, 0.02-3.00% of a coupling agent, 3.00-30.00% of a film forming agent, 0.02-2.00% of a lubricating agent, 0.02-0.80% of an antistatic agent, 0.01-2.00% of a pH adjusting agent and deionized water. The film forming agent is prepared by mixing nanosilicon dioxide modified polyester emulsion, PVAc emulsion and polyurethane modified epoxy emulsion, and the content of the nanosilicon dioxide modified polyester emulsion is not smaller than that of the polyurethane modified epoxy emulsion. The invention further provides application of the glass fiber impregnating compound in producing twistless roving. The twistless roving produced through the impregnating compound is high in permeating speed, good in choppability, good in production smoothness and good in compatibility with enhanced resin, production efficiency and the mechanical strength of a produced composite product are greatly improved, and the glass fiber impregnating compound is applicable to an injection process or a centrifugal casting molding process.

The invention provides a batch dyeing and drying treatment process for textile yarn. The process is completed through cooperation of a base, a tightening type turning device, an accelerated dipping device, a sealing cover, a drying frame and a wiping device, and can solve the problems that dust particles may be attached to the surface of the yarn in a conveying process, and the state during conveying is not in a tightening state, so that the above-mentioned conditions influence a dip dyeing effect; and the traditional dip dyeing time is short, the yarn is possibly not soaked thoroughly, dye separation is facilitated, and the dye on the separated yarn is distributed unevenly, so that part of the redundant dye is directly attached to the yarn after being dried, and thus a solidified fuel layer appears on the surface of the yarn, and the percent of pass of the yarn is influenced.

The invention discloses a wear-resistant and anti-corrosion glass fiber impregnating agent. Ethylene glycol phthalate 0.2‑1%, bis(acetylacetone) ethoxy isopropoxy titanate% 0.1‑0.4, sodium dodecyl diphenyl ether disulfonate 0.03‑0.15%, new Pentylene glycol diglycidyl ether 0.4-0.8%, nano-magnesium oxide 0.2-0.6%, glacial acetic acid 0.1-0.4%, and deionized water as the balance. The glass fiber produced by the formula of the invention has good dispersibility, fast soaking speed, no static accumulation, and good bonding performance with resin.

The invention relates to glass fiber-aramid fiber mixed fabric and a production method thereof. The glass fiber-aramid fiber mixed fabric comprises warp fiber bundles, weft fiber bundles and chopped strands, wherein the warp fiber bundles and the weft fiber bundles are uniformly distributed respectively; the warp fiber bundles and the weft fiber bundles are mutually staggered in a crossing way and are laminated; a layer of chopped strands is uniformly scatted between the warp fiber bundles and the weft fiber bundles; the warp fiber bundles are large-strand aramid fibers; the weft fiber bundles are large-strand glass fibers; the warp fiber bundles, the weft fiber bundles and the chopped strands are woven into fabric in a warp knitting and binding way. The conventional technology that single glass fibers are woven into fabric is changed, and by the production method, the warp fiber bundles, the weft fiber bundles and the chopped strands are woven into a low-cost and high-toughness complex structure in a warp knitting and binding way, so that the glass fiber-aramid fiber mixed fabric has both rigidness and flexibility and is impact-resistant; through arrangement of the chopped strands, the impregnating speed during impregnation of a finished product is greatly improved.

The invention provides a modified polyvinyl acetate emulsion, which comprises a vinyl acetate monomer, a dispersion medium, a protection colloid, an emulsifier, an initiator, a pH value adjuster and an internal plasticizer, wherein the internal plasticizer is unsaturated polyester, and the emulsifier is the mixture of a nonionic emulsifier and an anionic emulsifier. According to the present invention, with the modified polyvinyl acetate emulsion, the plasticizer migration and other related technical problems can be effectively solved, the mechanical property of the glass fiber mat and the penetration speed to the resin can be effectively improved, the performance is excellent, and the production cost is reduced. The invention further provides a preparation method and uses of the modified polyvinyl acetate emulsion.

The invention provides a high-efficiency seed soaking and germination accelerating device for planting, and relates to the technical field of agricultural equipment, the high-efficiency seed soaking and germination accelerating device comprises a main body frame, the bottom of the main body frame is fixedly provided with a motor; a gear A is arranged on an output shaft of the motor, and the gear A is an incomplete gear; a seed soaking frame is fixedly mounted at the top of the main body frame; a supporting frame is fixedly mounted on the outer side of the seed soaking frame; a vertical guide rod is fixedly mounted at the top of the seed soaking frame; and a liquid cylinder is mounted on the vertical guide rod in a sleeving and sliding manner. The device is provided with the up-down movement mechanism, the left-right movement mechanism and the seed stirring mechanism, seeds can be always in a movement state during soaking through the three mechanisms, the problem that the seed soaking efficiency is low due to standing soaking of the seeds is avoided, and the problem that when an existing device is used, most of the seeds are soaked in a water tank in a standing mode, and the soaking efficiency is poor is solved. And the standing of the seeds causes the problem that the soaking speed is too slow and the purpose of efficient seed soaking cannot be achieved.

The invention discloses a glass fiber polyester needled felt. The needled felt comprises a needled felt body, wherein a glass fiber precursor pierces the interior of the needled felt body; PTFE protective layers are arranged on the upper surface and the lower surface of the needled felt body; the needled felt body comprises a base cloth layer; a first superfine fiber layer and a second superfine fiber layer are respectively arranged on the upper surface and the lower surface of the base cloth layer; and a first composite fiber layer and a second composite fiber layer are arranged on the sides,away from each other, of the first superfine fiber layer and the second superfine fiber layer correspondingly. The glass fiber precursor pierces the interior of the needled felt body in a needling manner, so the needled felt is free of adhesive suture lines in the forming process, and a product is more attractive; the needled felt body is well protected under the action of the PTFE protective layers, so the service life of the needled felt body is prolonged; and the needled felt has the advantages of long service life, good dust removal effect, high strength and high abrasion resistance.