Bayer MaterialScience, Pittsburgh, will acquire the U.S. polycarbonate sheet business of Arkema Inc., Philadelphia. The acquisition includes Arkema’s Tuffak line of products for aerospace, transportation, and heavy equipment. Bayer, already a major producer of PC sheet, will also acquire sheet production equipment from Arkema. The deal is expected to be finalized this month. Tuffak is produced by Arkema’s Altuglas International unit, which continues to produce Plexiglas acrylic sheet and resins. The North American base for Bayer’s sheet business is at the former Sheffield Plastics in Sheffield, Mass.