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Which of the following materials is the outermost lamination layer in tetrapacks?

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+2 votes
in Food Packaging Technology by (63.0k points)
Which of the following materials is the outermost lamination layer in tetrapacks?

(a) Polyester

(b) Polypropylene

(c) Polyethylene

(d) Polystyrene

The question was asked by my school teacher while I was bunking the class.

I want to ask this question from Coating and Laminating in Thermoplastics in portion Thermoplastic Polymers Properties & Processing of Food Packaging Technology

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Best answer
Right choice is (a) Polyester

The best explanation: Polyester is the outermost lamination layer in tetrapacks. Polyester provides strength to the tetrapack. It also acts as an excellent printable surface. Polypropylene is the innermost layer, the food contact layer. Polyethylene and polystyrene is not used in tetrapacks.

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