BMC (bulk molding compound) or DMC (double molding compound) is called bulk molding compound (formerly known as BT-3), which, like sheet molding compound, is a thermosetting molding compound reinforced with short cut fibers.
Nowadays, in the United States, Japan, and China, BMC and DMC generally refer to the same type of material. According to the definition of SPI in the United States, BMC is a chemically thickened DMC.
Fenghua BMC Data Presentation
It has a series of excellent physical functions such as impact resistance, compression resistance, bending resistance, tensile resistance, high electrical capacity, high surface resistance, high insulation strength, high arc resistance, as well as non-toxic, corrosion-resistant, flame-retardant, etc. It particularly has excellent molding characteristics such as good fluidity, low molding pressure, short molding time, and low molding temperature.
It is widely used in the following categories:
1、 Electrical and electronic components: shells and structural components of various high and low voltage electrical switches, explosion-proof electrical components for chemical and mining industries, overall packaging of motors and solenoid valves, busbar frames, terminal blocks, insulation rods, insulators, various specifications of insulation boards, etc.
2、 Car industry: car body, bumper, headlight bracket, headlight bowl, trunk and other interior and exterior components and functional parts.
3、 Exterior industry: exterior frames, exterior shells, control levers, etc.
4、 Civilian products: sanitary ware, decorations, dishwasher liners, utensils, etc. (66-10MW microwave oven vessel specific BMC data, non-toxic and heat-resistant)
Five other aspects: electronic copiers, printing machinery, structural components of working machinery, electronic computer parts, etc. The basic characteristics of BMC are: mostly chemically thickened; The glass fiber content is between 9% and 25% higher than SMC (abbreviation for Sheet Molding Compound, which has superior electrical and corrosion resistance, lightweight, and simple and flexible engineering design advantages. Its mechanical function can be comparable to some metal materials, so it is widely used in transportation vehicles, construction, electronics/electrical and other professions.) Therefore, its physical and mechanical functions are slightly lower; The short cutting length scale is 3-25mm; The filler content is mostly higher than SMC; The material flowability, molding processability, and apparent quality of the product will be better than SMC; Products with precision and intricate structures such as thin-walled and narrow shapes highlight their advantages. But the molding conditions, process handling, defect countermeasures, and mold methods are similar to SMC technology.
