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PET was first developed by two British chemists, John Rex Whinfield and James Tennant Dickson of British Callico Printers in 1941. It was originally designed for use in synthetic fibers. The patent rights were sold to DuPont and ICI, which later distributed regional licenses among other companies.
PET was first used in films for packaging in the mid 1960's. At the beginning of the 1970's, the technique for "blowing" bioriented bottles was commercially developed.
Bottles are responsible for the large majority of PET resin consumption.
At the beginning of the 1980's, Cpet (crystallized polyethylene terephthalate) was developed. This material can be used in both microwaves and conventional ovens.

More recently, PETG ("polyethylene terephthalate glycol) surfaced as an environmentally correct alternative for the plastic card market in general (it is used for credit cards, for example). PETG is also used in other applications that require thermoforming.

PET is a transparent, resistant and extremely light product.

These characteristics contribute greatly to the success of the films as bottles.

For example, soft drinks generate pressure inside the bottle that can reach above 6 bar. However, thanks to the alignment of macromolecules (crystallization) that occurs during resin production and during the "blow" modeling process, this high pressure does not deform the bottle or cause it to explode.

The PET-based films also have a higher resistance that most plastics: stress resistance = 45 N/mm² and stretch until rupture = 300%.

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