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The CPET containers, made by thermoforming are stable upto what temperature?

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in Food Packaging Technology by (63.0k points)
The CPET containers, made by thermoforming are stable upto what temperature?

(a) 230°C

(b) 150°C

(c) 300°C

(d) 500°C

This question was posed to me in an online interview.

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

1 Answer

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Best answer
Right answer is (a) 230°C

Explanation: CPET (Crystallized Polyethylene terephthalate)containers, made by thermoforming are stable upto 230°C. The optimum amount of crystallinity is 28%–32%. CPET containers must be crystalline enough to be heat resistant but not so crystalline as to be too brittle for the application, for example, impact resistance at freezer temperatures.

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