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BMC electric motorsIn today's fast-growing electric vehicle industry, technological innovation is the core driving force for industry progress. Among them, BMC electric motors, with their unique techn...
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SMC insulation boardsmc insulatorIn today's rapidly developing automotive industry and electrical fields, progress in materials science is a key force driving innovation in the industry. Among them, h...
BMC molding compound Bulk molding compound has excellent electrical properties, mechanical properties, heat resistance, chemical corrosion resistance, and adapts to various molding processes, which can meet the performance requirements of various products, so it is more and more popular among users. Depending on the end application, the formulated composites provide precise dimensional control, good flame retardancy and tracking resistance, high dielectric strength, corrosion and stain resistance, excellent mechanical properties, low shrinkage and color stability. Bulk Molding Compounds (BMC Molding Compounds) have excellent flow properties and excellent insulation and flame retardancy, making them ideal for a wide variety of applications where detail and dimensional accuracy are required. Materials are available in 75 colors and are resistant to powder spray or water-based paint.
1. Properties of BMC plastic
Bulk prepreg made of chopped glass fiber mixed with unsaturated polyester slurry. It is suitable for molding by molding, transfer molding, injection molding and other processes. The obtained products have good mechanical properties, high dimensional stability, good surface finish, water resistance, oil resistance, corrosion resistance, heat resistance, and electrical properties. In particular, the arc resistance can reach about 190s.
2. Characteristics of BMC plastics
(1) General performance
The proportion of BMC plastic is relatively large, between 1.3 and 2.1; the product has a bright appearance, good hand feel, and a hard and heavy feeling; heating with fire will produce a lot of oil smoke and styrene odor; some varieties of BMC molding compounds ( BMC) is not flammable, but some varieties are extremely flammable, leaving inorganic substances after burning.
(2) Dimensional stability
The linear expansion coefficient of BMC plastic is smaller than that of general thermoplastics, which makes BMC molding compound have high dimensional stability and dimensional accuracy. Temperature has little effect on the dimensional stability of BMC molding compound (BMC), but the influence of humidity is more serious. BMC molding compound will expand after absorbing moisture. The linear expansion coefficient of BMC molding compound (BMC) is very close to that of steel and aluminum, so it can be compounded with it.
(3) Mechanical strength
The tensile, bending, impact strength and other properties of BMC plastics are higher than those of thermoplastics, and the creep resistance is also better than that of thermoplastics.
(4) Water and solvent resistance
BMC plastics have good corrosion resistance to water, ethanol, aliphatic hydrocarbons, grease, and oil, but are not resistant to ketones, chlorohydrocarbons, aromatic hydrocarbons, acids and bases. BMC molding compound (BMC) has low water absorption, and the insulation performance is still good after soaking for one day.
(5) Heat resistance
The heat resistance of BMC plastic is better than that of general engineering plastics, and the heat distortion temperature HDT is 200-280 ℃, which can be used at a temperature of 130 ℃ for a long time.
(6) Aging resistance
The aging resistance of BMC plastic is very good. It can be used indoors for 15-20 years, and its strength retention rate is above 60% after 10 years of outdoor exposure.
(7) Electrical properties
The arc resistance of BMC plastic is the most outstanding, which can reach about 190 seconds.
(8) Low odor properties
The styrene cross-linking agent used in BMC plastics will still have 0.1% residue after curing, and it will give off an odor when heated. Therefore, the BMC molding compound (BMC) used for food utensils (such as microwave tableware) should choose UP resin with no residual styrene monomer.
As a leading BMC/SMC molds and BMC/SMC molded products manufacturer in China, Aobang Technology Company Limited provide various products, BMC/SMC molds including but not limited to motor mold, auto parts mold, SMC cable bracket moulding and frame molding; BMC/SMC molded products including but not limited to BMC/SMC motor, SMC auto parts. The high-composite precision molds produced by Waiwai Tree have the characteristics of low energy consumption; our SMC and BMC molds have no waste, and there is no need to clear the inner cavity. Having only a small temperature difference, our SMC/BMC composites have stable mold temperature, good appearance, and high efficiency. Thus, they are now widely used in new energy vehicles, high-speed rail, and electric motors. Feel free to contact us if you have any related need!
