SMC is the abbreviation of Sheet molding compound, that is, sheet molding compound. The main raw materials are composed of SMC special yarn, unsaturated resin, low shrinkage additives, fillers and various additives. It first appeared in Europe in the early 1960s. Around 1965, the United States and Japan developed this technology one after another. In the late 1980s, my country introduced advanced SMC production lines and production techniques from abroad.
SMC has excellent electrical properties, corrosion resistance, light weight, easy and flexible engineering design, and its mechanical properties can be comparable to some metal materials, so it is widely used in transportation vehicles, construction, electronics/electrical and other industries.
The most prominent advantage of smc composite manhole cover is that it does not use steel frame reinforcement, but is reinforced by glass fiber composite, which is a GRC type product. Therefore, it has the advantage of being unaffected under the current situation of rising steel prices. Because it does not contain a bit of iron, it is more anti-theft than stone plastic and fiber concrete manhole covers.
The curing speed of smc composite manhole cover is several times faster than fiber concrete, and it can be demoulded in 8 hours. If it is produced in three shifts, it can be demolded three times in 24 hours. Although the amount of mold is more than that of stone plastic, it is only about 1/6 of fiber concrete manhole cover. , Can also reduce mold investment. With an annual output of 10,000 sets of manhole covers, only 10 sets of molds are needed.
smc composite manhole cover has high precision and corrosion resistance. After high temperature molding production, it has good acid and alkali resistance and corrosion resistance, which effectively prolongs the service life of the composite manhole cover.
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Post time: Sep-17-2021