Composite SMC Material data
All of our composite access covers, manhole covers in round, square and rectangular, gully gratings and frames, gully tops, rain gratings, inspection Chambers, recessed access covers, Bridge Drainage and Tank Sumps etc are made of composite SMC(sheet moulding compound), SMC is Unsaturated polyester resins reinforced with glass fibers. What is the Sheet Molding Compounds (SMC) SMC is an abbreviation for Sheet Molding Compound, which is a high strength glass fiber reinforced thermoset,moulding material which is normally compression moulded. It combines glass fiber and unsaturated polyester/ phenolic/ Vinyl and Acrylic modified resins, fillers(Calcium carbonate), catalysts, pigments and stabilizers, release agents to produce a high strength moulding compound. Glass reinforcement is between 10% and 60%, and glass length is between 1/2-inch and 1-inch (25mm). Manufacture of sheet molding compounds is a continuous in-line process. The material is sheathed both top and bottom with a polyethylene or nylon plastic film to prevent auto-adhesion. The paste is spread uniformly onto the bottom film. Chopped glass fibers are randomly deposited onto the paste. The top film is introduced and the sandwich is rolled into a pre-determined thickness. The sheet is allowed to mature for 48 hours. Delivered as sheet usually 2.5-6mm and 1000-1200mm wide. SMC is ideal for large structural components due to its high strength-to-weight ratio. SMC offers additional benefits in part design allowing localised rib reinforcement and bosses for fastening attachments and sub assemblies. Significant tooling investment and overall component cost savings result from part consolidation. With the same coefficient of thermal expansion as Steel and excellent corrosion resistance, SMC is an ideal alternative to Steel and can be used in the same fluctuating temperature environments. The main benefit however is a typical 25% weight reduction achieved at similar strength to Steel. The heat stability, mechanical and electrical properties of SMC are key attributes to its success in a number of industries including the automotive sector where it is commonly used in painted body panels, lightweight structural panels such as bumpers, valve covers, and engine shields. SMC is also extensively used in the production of electrical enclosures, lighting, solar, shower bases, walls, and sinks. SMC Manufacturing Process Manufacturing process including pulping, premix, placing glass fibers, steeping and rolling etc. Why SMC material is superior ? All parts of our covers are used high strength of thermoset SMC composites which made by our company. SMC—Sheet Moulding Compounds, Refers to the reinforced unsaturated glass fiber resin sheet molding compound which is mainly composed of unsaturated resin, glass fiber, filler and functional additives, is one kind of high performance composites used for compression molding. The main components including glass fiber, unsaturated polyester resi...