Questions about Thermoset Composites?

Custom Formulated Bulk & Sheet Molding Compounds - Technology

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Technology

The most common thermoset resins are polyester, vinyl ester, polyurethane, and epoxy. Each of these resins has its own price and performance characteristics, so selection is based on the functional and cost requirements of the application. For instance, design engineers might choose vinyl ester resin for corrosion-resistant products, epoxy resin for high-strength applications, or polyester resin when good overall performance and cost are the driving factors.

Bulk Molding Compounds (BMC) and Sheet Molding Compounds (SMC) are both fiber reinforced materials, typically utilizing glass strand fibers of varying lengths. SMC uses slightly longer length fibers than BMC, and typically has a higher percentage of reinforcement fibers than BMC. Fiber Lengths range from 1/32-inch in BMC up to 1-inch in some SMC's, resulting in various strength characteristics which can be customized for individual needs. IDI also offers carbon fiber reinforcement for applications that require exceptional strength coupled with severe weight restrictions in our Structural Thermoset line of products.

For more information, on Sheet Molding Compounds and Bulk Molding Compounds.

Custom Formulated Sheet & Bulk Molding Compounds

Material Performance

Material Description

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

Low Density

This class of Sheet Molding Compound is available in two types of applications: Appearance critical parts that require a Class A paintable finish and structural applications that require high strength and stiffness but are not appearance critical.

S80

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

DielectriteTM is suitable for 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 Rosite 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.

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