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In thermoforming, plastic sheets are heated to ________

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in Food Packaging Technology by (63.0k points)
In thermoforming, plastic sheets are heated to ________

(a) Boiling point

(b) Tg point

(c) Sag point

(d) Melting point

The question was asked in homework.

My question is based upon Thermoforming topic in division Thermoplastic Polymers Properties & Processing of Food Packaging Technology

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The correct answer is (c) Sag point

For explanation I would say: In thermoforming, plastic sheets are heated to Sag point. It is the temperature at which the plastic softens and extends under its own weight, i.e., when the plastic begins to sag.

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