Processing improvements in applying polyester onto a metal substrate

摘要

The invention is a laminating process which is directed toward economical production methods for scalable amounts of production which develop properties suitable for a broad based product line. In particular, the product is capable of important key components of commercial properties such as adhesion, scratch resistance, chemical inertness, and bending without failure.

主权项

1. Processing steps for laminating a metal substrate with a polymer film to create desirable simultaneous commercial properties comprising:
a. processing a metal substrate on a processing line, wherein said metal substrate is flat rolled, b. cleaning a first major side of said metal substrate, c. increasing the surface energy of said first major side by at least one of:
i. said cleaning of said first major side, andii. surface energy treatment equipment, d. preheating said metal substrate to at least 200° F., e. preselecting a biaxially oriented first film for bonding to said first major side, f. pressing said first film onto said first major side by use of a first roll thereby creating a metal polymer laminate, wherein said first film is primarily polyester and comprises at least one layer, g. post treating said metal polymer laminate by heating said metal polymer laminate to at least a final bonding temperature of said first film to said metal substrate, and h. cooling said metal polymer laminate to result in a finished product,whereby said finished product has said desirable simultaneous commercial properties comprising:
i. bonding of said first film onto said metal substrate of at least 43 ounces per inch, j. a pencil hardness of at least 2B, and k. successfully passing metal can pack testing of at least thirty days.