The internationally recognized corrosion-resistant vinyl resin is not only widely used in the chemical industry, but also in other fields, including the automotive industry. Thickening properties of vinyl resin has always been the direction of major manufacturers. With the application of BMC / SMC in automotive parts, thickened vinyl resins can withstand higher impact than conventional unsaturated resins with good creep and fatigue resistance. Thickening vinyl ester resin is a resin that allows the curing process to be carried out in stages, for prepregs or sheet molding compounds, allowing the curing reaction to proceed to the first stage, followed by hot press forming. The resin must have chemical thickening properties, but also to retain the unsaturated molecules, so that when the molding can be cross-linked curing. For this purpose, acidic functional groups are introduced into the vinyl ester molecules for thickening reactions. This resin is more permeable to glass fibers than polyester resin and has better fluidity so that the pressure during hot pressing can be reduced and the second stage has a very fast reaction speed. This epoxy vinyl ester resin sheet molding compound, can be used for molding structural parts, especially automotive components to reduce weight. In the wheels, seats, cooling rack, the engine valve sleeve and other automotive parts are applied.
In recent years, with the increasing use of carbon fiber composites in automotive applications, European thermoset resin composite resin companies have introduced vinyl ester carbon fiber SMC (CF-SMC) for semi-structured and structural automotive parts on non-A-surface, . The raw materials and molding equipment for the new Vinyl Carbon Fiber are supplied by Ludwigshafen, Germany. The produced CF-SMC offers excellent moldability, light weight and high mechanical properties. Components are AtlacXP810 vinyl ester resin and dispersion large tow (48K) carbon fiber reinforcement.
At present, in our country, resin stamping dies have been successfully applied in the trial production of domestic cars. FAW Mold Manufacturing Center designed and manufactured 12 sets of resin molds are trunk, hood, front and rear fenders and other large and complex internal and external cover of the tensile mold. Its main feature is the mold surface to CAD / CAM processing of the main model as a benchmark, the use of high-strength resin, low shrinkage of epoxy vinyl ester resin molding, punch die gap using imported wax accurately control the mold, high dimensional accuracy, The manufacturing cycle can be shortened by 1 / 2-2 / 3. Resin stamping mold technology for our car trial and small batch production has opened up a way, is a national initiative.
Domestic vinyl ester resin began production in the late 1970s, but because of higher product prices, insufficient popularity and other reasons, the output is still small, and the promotion and application are still not satisfactory. Vinyl resin in the country to expand the application from a number of overseas development and application of vinyl resin resin-based enterprises in the late 1990s into the Chinese market as a result. In recent years, with the development of high-performance composite materials led to the growth of vinyl resin. In smelting chemical industry, precision high-energy electrical appliances industry, land, sea and air transport industry, traditional energy conservation and renewable energy development and many other fields, with unique properties, high performance composite material in the important base material.
With the development of automobile manufacturing industry, the use of high-performance materials has greatly improved the structure and performance of composite materials, improved molding speed and manufacturing quality, and accelerated the practical application of composite materials in automobiles. The vinyl resin in the automobile manufacturing will also be increasingly widely used.
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