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The orientation % in BOPP by the double bubble process lies between _________

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in Food Packaging Technology by (63.0k points)
The orientation % in BOPP by the double bubble process lies between _________

(a) 200-1000

(b) 200-800

(c) 700-800

(d) 700-1000

I got this question in quiz.

My query is from Orientation of Thermoplastic Films topic in section Thermoplastic Polymers Properties & Processing of Food Packaging Technology

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The correct option is (c) 700-800

To explain I would say: The orientation % in BOPP by the double bubble process lies between 700-800%. This happens because of the elastic memory of Polypropylene, which leads to shrinkage of the film after orientation.

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