Solvent Recovery in Transfer Ribbon Manufacture
Original Publication Date: 1981-Jul-01
Included in the Prior Art Database: 2005-Feb-11
Resins cast in typewriter ribbon manufacture and the like in solutions of dichloromethane (CH(2)Cl(2)) or tetrahydrofuran (THF) are removed by immersing the cast layer directly into a low viscosity mineral oil. The process avoids removal of the solvent by evaporation, thus eliminating the concern that vapor will enter the atmosphere during evaporative extraction.