Question

Draw ratios in tender frame process ranges from ______ to _____

(a) 4:1, 10:1

(b) 2:1, 10:1

(c) 3:1, 10:1

(d) 5:1, 10:1

This question was addressed to me in unit test.

The origin of the question is Orientation of Thermoplastic Films in division Thermoplastic Polymers Properties & Processing of Food Packaging Technology

Answer 1

Correct option is (a) 4:1, 10:1

For explanation I would say: Draw ratios in tender frame process ranges from 4:1 to 10:1. It is for both the directions- Machine Direction (MD) and Transverse Direction (TD). In the tender frame process, the thermoplastic film is first stretched in the machine direction and then the transverse direction.