| abstract |
A two-step method of laminating at least two plastic films of same or different nature, comprising contacting intimately said films at a temperature in the range from ambient up to the melting temperature of the film having the lowest melting point of said films in order to form a low peel strength composite, and subsequently subjecting the composite to a treatment at a temperature within the range from 60 DEG to 180 DEG C., the 60 DEG to 180 DEG C. temperature being below the melting or softening temperature of the constituents in the composite having the lowest melting or softening temperature, in order to form a high peel strength laminate, non-surface treated films being used and the composite of the first step being subjected to the treatment of the second step in a condition substantially free of tension and pressure. |