Question

In the process of surface treatment before lamination or coating, the surface energy is ______

(a) Constant

(b) Decreased 10 fold

(c) Increased

(d) Decreased

I got this question by my college professor while I was bunking the class.

My enquiry is from Coating and Laminating in Thermoplastics topic in division Thermoplastic Polymers Properties & Processing of Food Packaging Technology

Answer 1

Correct option is (c) Increased

The explanation: In the process of surface treatment before lamination or coating, the surface energy is increased. This is done to improve wet-out and adhesion of coatings, inks and adhesives used. Improved wet-out maximises the contact area and attractive forces between the films.