Bulk molding compounds (BMCs) are ready-to-mold, glass-reinforced polyester materials. They’re pre-mixed to achieve special characteristics. When molded, the finished product offers these characteristics inherently. Depending on the product and final application, the right BMC can achieve certain properties. For example, Mar-Bal produces electrical standoff insulators using a BMC featuring flame retardant polymer and track-resistant glass.
BMCs encompass a broad range of practical applications. Thanks to their composition — which includes proportions of plastic resin, inert fillers, reinforced fibers, catalysts, stabilizers, and dyes — BMCs are incredibly versatile. Depending on the blend, a BMC could imbue any or all of the following properties in a molded product:
Add to this the fact that BMCs can be compression or injection molded and it’s easy to see why so many applications benefit from molded products.
BMCs are molded into thermoset composites, which find practical application across industries. Some of the most common places BMCs contribute their benefits include:
The common theme among all the above applications is mass production. The speed and convenience of thermoset molding — combined with the versatility of BMC formulation — lends itself to the demand for rapidly produced, replicable, cost-effective components. For most mass-produced goods, this is a winning combination that keeps costs low and ensures quality control.
The right BMC is an invaluable asset. Considering the vast number of molded products in use across industries today, the ability to customize a formulation for a specific application unlocks a wealth of possibilities for companies.
Mar-Bal is the leading integrated compounder and molder of BMC thermoset composite products and value-added finishing services. If you have a custom project or want to discuss engineered BMC and thermoset composite materials with our knowledgeable team, contact us today at 440-543-7526 or through our website.
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