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Which of the plastics cannot be extrusion blown?

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+1 vote
in Food Packaging Technology by (63.0k points)
Which of the plastics cannot be extrusion blown?

(a) HDPE

(b) PP

(c) PVC

(d) PET

I had been asked this question during an online exam.

I need to ask this question from Blow Molding in Thermoplastics in section Thermoplastic Polymers Properties & Processing of Food Packaging Technology

1 Answer

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Best answer
Right option is (d) PET

The explanation: The common grades of PET(Polyethylene Terephthalate) cannot be extrusion blown. Extrusion blow moulding is widely used with the following resins: HDPE- High Density Polyethylene, PP- Polypropylene, PVC- Polyvinyl Chloride. The most common blow molding resin is HDPE used to produce containers ranging in size from 30 mL to 200L.

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