Closed molding

Closed molding means a grouping of processes for fabricating composites in a way that HAP-containing materials are not exposed to the atmosphere except during the material loading stage (e.g., compression molding, injection molding, and resin transfer molding). Processes where the mold is covered with plastic (or equivalent material) prior to resin application, and the resin is injected into the covered mold are also considered closed molding.

Source

40 CFR § 63.5935

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Scoping language

Terms used in this subpart are defined in the CAA, in 40 CFR 63.2, and in this section as follows:

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