Open Molding

Information About Open Molding

openmold-2Employee exposure is now regulated by an Occupational Safety and Health Administration (OSHA) workplace airborne threshold limit value (TLV) of 50 parts per million (ppm) in many states including Minnesota. Releases to air are regulated by the Clean Air Act (CAA) National Emission Standards for Hazardous Air Pollutants (NESHAP) for reinforced plastic composites and boat manufacturing. Neither of these standards can be met cost-effectively without implementing pollution prevention methods and technologies that reduce styrene emissions.

Styrene reduction strategies rely on minimizing resin contact with air and can be achieved in a number of different ways. In open molding situations, maximizing the transfer of resin into the mold through operator training and improved resin application techniques is preferable. Additionally, switching to low-styrene emission resins is an important step to take.

SPECIAL PROJECT: Reducing Emissions from FRP Shops

MnTAP is partnering with the Minnesota Pollution Control Agency (MPCA) on an effort to help Minnesota’s fiber-reinforced plastics (FRP) industry reduce styrene emissions. As you may be aware, styrene was recently listed as a chemical of high concern by the Minnesota Department of Health. MnTAP believes that eliminating styrene has environmental and occupational benefits and can lower energy costs, potentially reduce part weight, and reduce reporting requirements and fees. Learn more about the project and how you can participate by clicking here.

Resources for Reducing FRP Emissions from Open Molding

MnTAP Industry Case Studies