Off-line process for laminating magnetic tape to tab stock

Abstract

Abstract The present disclosure is directed to an ''''off-line'''' procedure for preparing magnetic ledger cards and similar articles having paper or plastic substrates containing thin stripes of flexible plastic magnetic tape, wherein a solvent-based adhesive comprised in its essential components of an ethylene-vinyl acetate copolymer with significant amounts of a modified phenolformaldehyde resin and paraffin wax is first applied to a flexible plastic tape previously provided with at least one magnetic layer, film or coating. The adhesive solution is then dried to remove the solvent whereupon the tape can be stored for extended periods of time due to its non-tacky, non-blocking nature at ambient and elevated storage conditions of temperature and humidity. The adhesive is non-blocking at temperatures as high as 130* F. At any desired time thereafter, the thus adhesively coated magnetic tape can be laminated to a paper or suitable ledger or tab stock substrate by the use of heat without requiring any additional, i.e., extraneous, adhesive. The term ''''off-line'''' designates that the adhesive is applied before and frequently in a different location from that in which lamination of the paper base and magnetic tape occurs.

Inventors

• 👤 W Chao

Bibliographic Details