초록 ▼

A plastic coating machine comprising means for continuously delivering the transparent film to be applied to the paper material support, a set of application rollers intended for spreading a thin layer of a solvent-free adhesive onto one side of said film, a pair of synchronized pressure rollers tha

A plastic coating machine comprising means for continuously delivering the transparent film to be applied to the paper material support, a set of application rollers intended for spreading a thin layer of a solvent-free adhesive onto one side of said film, a pair of synchronized pressure rollers that carry out the operation of uniting said film with said paper material which is supplied by an automatic feeder or any other feeding system, a reel that picks up the plastic coated material, and means for adjusting the film tension over its whole path from said spreading group to the joining rollers.

대표청구항 ▼

[ I claim:] [1.] A method for uniting separate material sheets of paper or cardboard material or a continuous web of paper material with a transparent or clear protective film in a plastic coating machine comprising:(a) supplying a continuous film from a roll of film;(b) tensioning said film;(c) app

[ I claim:] [1.] A method for uniting separate material sheets of paper or cardboard material or a continuous web of paper material with a transparent or clear protective film in a plastic coating machine comprising:(a) supplying a continuous film from a roll of film;(b) tensioning said film;(c) applying a solvent-free adhesive comprising a polyurethane compound of the single component type onto only one side of said film under tension by an adhesive spreading assembly;(d) establishing a long, generally horizontal flight path with a plurality of transmission rollers that is sufficiently long to dry partially said adhesive on said film to a desired tackiness without the use of hot air while said film is moved at a high speed over said transmission rollers;(e) guiding and moving said adhesive treated film at a high speed over said long flight path while partially drying said adhesive on said film without the use of hot air to a desired tackiness of the adhesive where it will immediately grip the paper or cardboard material to which it is to be laminated without slippage therebetween;(f) tensioning said film after said film exits said flight path; and,(g) feeding said tensioned adhesive tacky film to a pair of compression rollers and joining said film together with said paper or cardboard material by said pair of compression rollers.