Micarta FBE

Product Description

Westinghouse Micarta FBE was an asbestos-paper reinforced phenolic-resin laminate produced for industrial electrical insulation applications. The FBE grade — like FBG and FBI variants — was paper-phenolic construction using asbestos paper rather than cellulose paper as the reinforcement web, providing higher temperature resistance and dimensional stability than standard paper-phenolic grades.

Micarta FBE was used in switchgear arc chutes, motor brush holders, terminal blocks, transformer coil supports, and similar electrical-insulation applications. Customer fabrication operations included sheet cutting, machining, and drilling — all of which generated asbestos-bearing dust from the cured laminate.

Asbestos Content

Litigation records document that Micarta FBE was alleged to have contained asbestos fiber as a functional filler or reinforcing agent. Asbestos fibers were incorporated into industrial materials of this category to enhance heat resistance, mechanical strength, dimensional stability under thermal cycling, and electrical-insulation properties.

Plaintiffs alleged that asbestos fibers in Micarta FBE were typically chrysotile, amosite, or a combination thereof — consistent with industry practice for the asbestos era. When the cured material was subjected to mechanical operations (drilling, grinding, sanding, machining, cutting) or when raw material was handled and processed, those fibers could become airborne.

How Workers Were Exposed

Litigation records document multiple exposure pathways for workers who handled Micarta FBE:

Raw material handling: Workers who received, weighed, blended, or transferred the material in production environments could disturb settled asbestos fibers and generate airborne dust.

Manufacturing operations: Workers operating the production equipment — molding presses, lamination presses, compounding mixers, cutting saws — were exposed during normal operation, equipment cleaning, and routine maintenance.

Machining and finishing of finished material: Secondary operations including drilling, reaming, turning, grinding, sanding, sawing, and routing of Micarta FBE generated fine dust containing asbestos fibers. These operations were performed by machinists, toolmakers, electricians, and assembly workers who may not have been informed that the material contained asbestos.

Maintenance and tooling work: Maintenance workers responsible for cleaning equipment, servicing presses and mixers, and disposing of accumulated dust in facilities that produced or processed Micarta FBE could encounter substantial exposure during cleaning and repair operations.

The occupational exposures associated with asbestos-containing industrial laminates and molding compounds are consistent with patterns recognized by OSHA and NIOSH. The latency period for asbestos-related diseases is typically 20-50 years between initial exposure and diagnosis, meaning workers exposed to products like Micarta FBE during the mid-twentieth century may be receiving diagnoses today.

See also

References to manufacturers, products, and litigation history reflect what has been alleged or documented in publicly filed asbestos litigation. This information does not constitute a finding of fact or liability.