The characteristics of thermosetting BMC plastics

The characteristics of thermosetting BMC plastics

BMC molded plastic pellets have excellent electrical properties, mechanical properties, heat resistance, chemical corrosion resistance, and are also suitable for various molding processes, which can meet the performance requirements of various products. Therefore, they are increasingly favored by users.

BMC molding compound is a thermosetting plastic that mixes various inert fillers, fiber reinforced materials, catalysts, stabilizers, and pigments to form an adhesive "putty like" composite material used for compression molding or injection molding. BMC molding materials are highly filled and reinforced with short fibers, with glass fiber reinforced materials accounting for 10% to 30% and typically ranging in length from 1/32 inch to 1/2 inch (12.5mm).

According to different final application fields, the prepared composite materials can be precisely controlled in size, have good flame retardancy and resistance to electric traces, high dielectric strength, corrosion resistance and stain resistance, excellent mechanical properties, low shrinkage, and stable color. The flow characteristics, insulation, and flame retardancy of BMC molding materials are excellent, making them very suitable for various applications that require precise details and dimensions. There are 75 colors of materials to choose from, which can withstand powder spraying or water-based coatings.

Nature:

A clustered prepreg made by mixing short cut glass fibers with unsaturated polyester slurry. Suitable for molding using molding, transfer molding, injection molding and other processes, the resulting products have good mechanical properties, high dimensional stability, good surface smoothness, excellent water and oil resistance, corrosion resistance, heat resistance, and excellent electrical performance, especially the arc resistance can reach about 190s.

1. General performance: The proportion of BMC molding compound (DMC) is relatively high, ranging from 1.3 to 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 fumes and a smell of styrene; Some varieties of BMC molding compounds (DMC) are difficult to ignite, but some varieties are extremely flammable, leaving inorganic substances after combustion.

2. Dimensional stability: The linear expansion coefficient of BMC molding compound (DMC) is (1.3-3.5) × 10-5K-1, which is smaller than that of general thermoplastic plastics, making BMC molding compound (DMC) have high dimensional stability and accuracy. Temperature has little effect on the dimensional stability of BMC molding materials (DMC), but humidity has a more severe impact. BMC molding materials will expand after absorbing moisture. The linear expansion coefficient of BMC molding compound (DMC) is very close to that of steel and aluminum, so it can be composite with it.

3. Mechanical strength: BMC molding materials (DMC) have higher tensile, bending, impact strength, and creep resistance than thermoplastic materials.

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