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Molten tube of thermoplastic is called _______

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in Food Packaging Technology by (63.0k points)
Molten tube of thermoplastic is called _______

(a) Parison

(b) Thermotube

(c) Parrison

(d) Tubling

I have been asked this question in an online quiz.

This key question is from Blow Molding in Thermoplastics in section Thermoplastic Polymers Properties & Processing of Food Packaging Technology

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Right choice is (a) Parison

To elaborate: Molten tube of thermoplastic is called parison. It is a long plastic tube, with a hole, to let compressed air pass through it. Making parison is the first step of blow moulding.  Parison is also known as Preform.

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