BMC Eletric Motors Good Aging Resistance
BMC Eletric Motors (DMC) material is the abbreviation of Bulk (Dough) molding compounds, that is, mass molding compound. Domestic often known as unsaturated polyester molding compound. The main raw material from the GF (chopped glass fiber), UP (unsaturated resin), MD (filler calcium carbonate) and a variety of additives by the full mixing of the pellet-like prepreg. DMC materials in the 1960s in the former West Germany and the United Kingdom, first applied, and then in the 1970s and 80s, respectively, in the United States and Japan have been a greater development. BMC Eletric Motors cluster molding compound with excellent electrical properties, mechanical properties, heat resistance, chemical resistance, but also to adapt to a variety of molding process, you can meet the performance requirements of a variety of products, so more and more users favorite.
Batch molding (BMC Eletric Motors) is a thermosetting plastic in which various inert fillers, fiber reinforcements, catalysts, stabilizers and pigments are mixed to form an adhesive "greasy" composite for compression molding or injection molding The The bimetallic molding (BMC Eletric Motors) is highly filled and reinforced by short fibers, with glass fiber reinforcements between 10% and 30% and typically between 1/32 and 1/2 inch (12.5 mm) in length.
According to the different final application areas, the preparation of composite materials can be precisely controlled size, good flame resistance and resistance to electric marks, with high dielectric strength, corrosion resistance and stain resistance, excellent mechanical properties, low shrinkage Color stability. The flow molding properties and insulation and flame retardancy of the batch molding compound (BMC Eletric Motors) are excellent and are suitable for a wide variety of applications requiring precise detail and size. The material has 75 colors to choose from, can withstand powder coating or water-based paint.
Nature: chopped glass fiber and unsaturated polyester paste mixed with the group of prepreg. It is suitable for molding by molding, transfer molding, injection molding and so on. The obtained products have good mechanical properties, high dimensional stability, good surface finish, water resistance, oil resistance, excellent corrosion resistance and good heat resistance and electrical properties. Arc resistance can reach about 190s. According to the formula dubbed resin paste, the main component with the sheet molding compound, filler increased, generally without thickener, and then resin slurry and chopped glass fiber (length of about 3 ~ 25mm) fully mixed in the system. Mainly used in electrical appliances, motors, radio, instrumentation, machinery manufacturing, chemical equipment, construction, transportation, defense and other departments.
⒈ general performance: BMC Eletric Motors larger proportion, between 1.3 ~ 2.1; product appearance bright, feel good, there are hard and heavy feeling; with fire will produce a lot of fumes, and styrene smell; some varieties of BMC Eletric Motors Flame retardant, but some varieties and easy to burn, after burning left inorganic material.
⒉ dimensional stability: BMC Eletric Motors linear expansion coefficient is (1.3 ~ 3.5) × 10-5K-1, smaller than the average thermoplastic, which makes the BMC Eletric Motors has a high dimensional stability and dimensional accuracy. The effect of temperature on the dimensional stability of BMC Eletric Motors is very small, but the effect of humidity is more serious, BMC Eletric Motors will expand after moisture absorption. BMC Eletric Motors linear expansion coefficient and steel, aluminum is very close, so it can be combined with.
⒊ mechanical strength: BMC Eletric Motors tensile, bending, impact strength and other properties than thermoplastic, creep resistance is better than thermoplastic.
⒋ water and solvent: BMC Eletric Motors on water, ethanol, aliphatic hydrocarbons, grease, oil has good corrosion resistance, but not resistant to ketones, chlorinated hydrocarbons, aromatic hydrocarbons, acid and so on. BMC Eletric Motors water absorption is low, soaking a day after the insulation performance is still very good.
⒌ heat resistance: BMC Eletric Motors heat resistance than the general engineering plastics are good, heat distortion temperature HDT 200 ~ 280 ℃, long-term use at 130 ℃ temperature.
⒍ Aging resistance: BMC Eletric Motors anti-aging performance is very good, in the room available 15 to 20 years, outdoor exposure 10 years after its strength retention rate of 60% or more.
⒎ electrical performance: BMC Eletric Motors arc resistance of the most prominent, can reach about 190 seconds.
⒏ low odor: BMC Eletric Motors styrene crosslinking agent used in the curing will still have 0.1% residual, heating will be issued when the smell. Therefore, BMC Eletric Motors used in food utensils (such as microwave utensils) should be used without residual styrene monomer type UP resin.