Dapol Plastics was founded by brothers David (1911-1991) and Louis Goldrosen, and their friend Peter Salzer. The Dapol name being an amalgamation of the founders' three names: David, Peter and Louis—with Louis' name presumably being flipped to create a better sounding name. Worcester Toy, a sister company to Dapol Plastics which shared their 53 Northboro St. location, would manufacture a variety of toys while Dapol Plastics would produce houseware, lawn and garden products, and holiday decorations. David Goldrosen would oversee Worcester Toy, while Louis Goldrosen and Peter Salzer would be responsible for Dapol Plastics.
Dapol Plastics and Worcester Toy would both be later acquired by Instrument Systems Corporation through a subsidiary: Plascor, Incorporated. David Goldrosen would continue to work at the newly formed “Dapol Plastics Systems” for a few years before leaving to start a new company, Tivoli Toy. Plascor, Incorporated, and by extension Dapol Plastics Systems, would later declare bankruptcy in 1979.
Information courtesy of John Goldrosen via phone interview.