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Which film is used for improving barrier properties of PET bottles?

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in Food Packaging Technology by (63.0k points)
Which film is used for improving barrier properties of PET bottles?

(a) PVC

(b) PED

(c) DLC

(d) GLC

The question was posed to me in unit test.

My doubt stems from Blending and Vapor Deposition in Thermoplastics in chapter Thermoplastic Polymers Properties & Processing of Food Packaging Technology

1 Answer

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Best answer
Right answer is (c) DLC

The best I can explain: DLC (Diamond like Carbon) film is used for improving barrier properties of PET bottles. There is deposition of a very thin DLC film on the inner surface of PET bottle by PECVD mechanism. DLC film provides gas barrier properties, flavour barrier, UV barrier, chemical inertness, recyclability, etc.

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