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

The invention provides a self-crosslinking polyvinyl acetate film-forming agent, wherein the raw materials comprise vinyl acetate, deionized water, modified polyvinyl alcohol, an emulsifier, a reactive emulsifier, a cross-linking monomer, an initiator and a pH value adjuster, and the cross-linking monomer is an amide compound. According to the present invention, through the mutual cooperation of the components, the prepared film-forming agent has characteristics of strong precursor bundling property, excellent high-temperature performance, high stiffness, good self-crosslinking property, goodsolvent resistance and the like. The invention further provides a preparation method and uses of the self-crosslinking polyvinyl acetate film-forming agent.

The invention discloses an ultra-high-performance electronic glass fiber cloth production process which specifically includes the steps: A, slightly splitting electronic glass fiber cloth; B, drying the slightly split electronic glass fiber cloth; C, deeply splitting the dried electronic glass fiber cloth; and D, drying the deeply split electronic glass fiber cloth so that ultra-high-performance electronic glass fiber cloth is obtained. During slight splitting, cloth surfaces are humidified by a water-washing oscillating trough, so that warp and weft yarns are bulked, and fibers are loosened; and during deep splitting, purified water is sprayed from holes of nozzles to be directly jetted to the cloth surfaces, the front and the back of the glass fiber cloth are sprayed by water columns, the warp and weft yarns are broken apart after the cloth surfaces are subjected to impact pressure of the purified water columns, the compactness of the glass fiber cloth is greatly reduced, and gaps among the warp and weft yarns are mostly filled by loose single fibers to be smaller, so that the surfaces of the glass fiber cloth become dense and uniform, and the surfaces of the glass fiber cloth are smoother after splitting.

The invention discloses a glass fiber sizing agent, comprising the following components. The content of each component is expressed as a weight percentage: 0.4-1.2% of a silane coupling agent, 6.0-35.0% of a film-forming agent, and 0.08-2.0% of a lubricant , 0.06-2.8% of pH regulator, 59-93.46% of water; wherein, the film-forming agent is a composition of acrylic modified epoxy resin emulsion and silane coupling agent modified cross-linked PVAc emulsion. The untwisted roving for transparent sheet produced by this sizing formulation has the characteristics of good chopped performance, less hairiness, good dispersion in resin and high transparency, which can meet the quality requirements of customers.

The invention provides a vacuum perfusion technology. The vacuum perfusion technology comprises the following steps: providing a perfusion space; paving a reinforcing material on the perfusion space;paving a flow guide pipe, wherein the flow guide pipe is provided with a perfusion opening, a first flow channel, a second flow channel and a filling opening, the first flow channel is communicated with a first region and the second flow channel is communicated with a second region; perfusing a wetting material; enabling the wetting material to enter the corresponding first region and second region from the first flow channel and the second flow channel respectively; blocking the flow guide pipe; when the reinforcing material reaches a first pre-set wetting degree, filling the flow guide pipewith a filling material through the filling opening, so as to enable the filling material to gradually block the first flow channel, reduce the flowing of the wetting material in the flow guide pipe toward the first region, and increase the flowing the wetting material toward the second region through the second flow channel. By adopting the vacuum perfusion technology, a condition that excessivewetting materials are retained in the flow guide pipe can be avoided and one or more aims of improving the vacuum perfusion efficiency and reducing the vacuum perfusion cost can be realized.

The invention discloses a glass fiber sizing and its preparation method and application. The glass fiber sizing contains solid components and water; the mass of the solid components accounts for 3-8% of the total mass of the sizing; the solid components contain the following components , the ratio of the mass of each component to the total mass of the solid component is as follows: silane coupling agent 3-10%, lubricant 1-10%, film-forming agent A 20-70%, film-forming agent B 20-70%, Film-forming agent A+film-forming agent B 80-96%; wherein, the silane coupling agent is an amino-containing silane coupling agent, and the film-forming agent A and film-forming agent B are polyurethanes with different relative molecular weights. The glass fiber products produced by using this sizing agent can meet the requirement of less hairiness under high tension in the polyurethane winding process, have good compatibility with the polyurethane matrix resin, fast soaking speed, and high mechanical properties of the subsequent products.

The invention discloses a glass fiber sizing agent for yarns used for manipulator spraying, and belongs to the technical field of glass fiber sizing agents. The glass fiber sizing agent for the yarn used for manipulator spraying includes: a two-component coupling agent, a two-component film-forming agent, a two-component lubricant, an antistatic agent, a pH value regulator and deionized water. The spray yarn produced by the glass fiber sizing agent of the present invention can be used for spraying by a manipulator, has good chopping property, excellent slip performance, good dispersibility, fast soaking speed, static electricity accumulation, good bonding performance with matrix resin, and stable quality.