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Custom Formulated Bulk & Sheet Molding Compounds
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Sheet Molding Compounds

Sheet Molding Compounds (SMC)

Sheet Molding Compound Offers Superior Strength and Electrical Insulation

Sheet Molding Compound (SMC) is a compression molding compound often used for larger parts where higher mechanical strength is needed. SMC is a fiber reinforced thermoset material. Glass reinforcement is between 10% and 60%, and glass length is slightly longer than Bulk Molding Compound (BMC) - between 1/2-inch and 1-inch (25mm).

Sheet Molding Compound ProductionThermoset Sheet Molding Compound (SMC) is a mixture of polymer resin, inert fillers, fiber reinforcement, catalysts, pigments and stabilizers, release agents, and thickeners and possesses strong dielectric properties. Manufacture of sheet molding compounds is a continuous in-line process. The material is sheathed both top and bottom with a polyethylene or nylon plastic film to prevent auto-adhesion. The paste is spread uniformly onto the bottom film. Chopped glass fibers are randomly deposited onto the paste. The top film is introduced and the sandwich is rolled into a pre-determined thickness. The sheet is allowed to mature for 48 hours.

Sheet molding compounds can be molded into complex shapes. Superior mechanical properties and surface appearance, plus excellent electrical insulation make this thermoset material ideal for automotive Class A body panels, high-strength electrical parts, business equipment cabinets, personal watercraft, and various structural components.

Bulk Molding Compounds

Bulk Molding Compounds (BMC)

Bulk Molding Compound Offers Excellent Flow Characteristics

Bulk Molding Compound (BMC) is a thermoset plastic resin blend of various inert fillers, fiber reinforcement, catalysts, stabilizers, and pigments that form a viscous, 'puttylike' injection molding compound. Bulk Molding Compound (BMC) is highly filled and reinforced with short fibers. Glass reinforcement represents between 10% and 30%, with glass length typically between 1/32-inch and 1/2-inch (12.5mm). Depending on the end-use application, bulk molding compounds are formulated to achieve close dimensional control, flame and track resistance, electrical insulation, corrosion and stain resistance, superior mechanical properties, low shrink, and color stability. Its excellent flow characteristics, dielectric properties, and flame resistance make this thermoset material well-suited to a wide variety of applications requiring precision in detail and dimensions as well as high performance. The material is available in a broad selection of colors, and can tolerate powder-coat or water-based paint.
Custom Formulated Bulk & Sheet Molding Compounds

Material Grade
(Classification)

Proposed Application

SMC Series
Number

BMC Series
Number
General
Purpose
General purpose composite materials with a wide range of applications. Suitable applications are typically structural in nature with no flammability requirements. S10 B10
Heat and
Corrosion Resistant
Composite materials intended for use in sanitary, cookware, appliance and indirect food contact applications. S20 B20
Low Shrink Materials Low shrink composite materials. Well suited for applications requiring shrink <0.1%. S30 B30
Low Profile,
Zero Shrink
Intended for use in automotive or transportation body panels that require painting. These composite materials exhibit a zero or near zero shrink characteristic. S31
Low Smoke & Flame Spread These materials provide low smoke generation and flame spread in accordance with ASTM E162, E662 and E84 standards. S42
UV Stable These materials are suitable for use in applications requiring superior colorfastness & physical property retention upon exposure to UV and visible light S51 B51
Low Smoke & Flame Spread These materials provide low smoke generation and flame spread in accordance with ASTM E162 and E662 standards. S52
Corrosion Resistant These composites are typically unsaturated polyester or epoxy vinyl ester materials formulated to meet the strict performance requirements of pumps, pipe flanges & underground applications that are impacted by corrosive environments. S90 B90
Dielectric &
Flame Resistant
Electrical applications requiring a composite material that possesses a UL Yellow card and flammability performance from UL94 HB, V-0 & 5VA. These materials can be found in Underwriters Laboratory file E53587. E200 Series 40 Series
Electrical Insulators & Flame Resistant These high strength BMC composites are suitable for use in electrical applications requiring materials that possesses dielectric properties and flammability performance from UL94 HB, V-0 & 5VA. These materials can be found in Underwriters Laboratory file E53587. 3000 Series
6000 Series
Flame Resistant & Low Smoke Generation This composite is certified as a low smoke toxicity material with a UL94 V-0 flame rating. It's physical characteristics have been certified to meet several US Municipal Transit Authority specifications. 46-16-60
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