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In general, temperatures for melt phase thermoformed Polypropylene is greater than SPPF Polypropylene.

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in Food Packaging Technology by (63.0k points)
In general, temperatures for melt phase thermoformed Polypropylene is greater than SPPF Polypropylene.

(a) True

(b) False

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

This question is from Thermoforming topic in section Thermoplastic Polymers Properties & Processing of Food Packaging Technology

1 Answer

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Best answer
Right choice is (a) True

To explain: The above statement is true. In general, temperatures for melt phase thermoformed Polypropylene is greater than SPPF(Solid phase pressure formed) Polypropylene. It is melt phase thermoformed at 154°C–157°C and SPPF at 141°C–146°C, where it is still virtually a solid with high viscosity, requiring the application of strong forces.

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