Embossing Polyester Film

Embossing Polyester Film
Polyester films from DuPont Teijin Films provide excellent strength, durability and appearance for graphic and tactile layers of membrane switches when key embossing parameters are monitored:

• Platen dishing, which can lead to a series of high and low areas in embossed parts, occurs in the centers of platens following many forceful cycles.
• Leading edge pre-strike can occur when platens are misaligned. This can be prevented by securing, leveling and balancing the press.
• Temperature variations across platens can result from age, and can cause inconsistent embossing.
• Processing conditions that require attention include heating of both platen and polyester film to specifications, and pressing for an extended multi-dwell rather than a constant dwell.
• Die specifications, which should be carefully followed when embossing polyester films.