| 摘要 |
The invention relates to a method and apparatus for laminating a film (e.g. of transparent polypropylene) to a substrate (e.g. paper stock bearing printed matter). The method and apparatus comprises coating the film at a station incorporating a pair of contra-rotatable rollers rotatable about parallel, horizontal axes and defining a nip. One roller has a portion of its periphery immersable in a bath of water-based adhesive, (e.g. a mix of ethylene and vinyl acetate). The coated film is stripped from the roller and fed to a first infra-red heater tuned to a frequency which evaporates the water content of the adhesive; a laminating station comprising a first pair of contra-rotatable pinch rollers comprising a metal roller and a rubber roller rotatable about parallel axis and defining a nip; a second infra-red heater, also tuned to a frequency that activates the solids of the adhesive adhering to the film; and a second pair of pinch rollers comprising two metal rollers defining a nip. |
