Dartec

A registered trademark originally for DuPont (Canada) for a Thermoplastic, nylon film composed of Nylon 6,6. Dartek® is a clear, strong, tear-resistant film that has low oxygen and moisture permeability, abrasion resistance, excellent gas and oil barrier protection, and tensile strength. Capable of absorbing up to 10% of its weight in moisture resulting in greater pliability over irregular surfaces. The soft, transparent, stretchable film will conform to any shape using vacuum or gentle heating, such as with a hair dryer.
Of the Dartek® films available, C-917 is the most commonly used for art packing, storage, and conservation as it has no plasticizers or surface coating (PACCIN), contains a heat stabilizing additive (melt point of 510°F), and is low-shrink.
Dartek® is used in industry for lamination and packaging. Manufactured by Transcontinental as of 2007.

roll of Dartek film
Credit: Ashley Distributors
As of 2020 all Dartek varietals listed below were discontinued [4]:
B-601 : Barrier film, 25 micron thickness, used for thermoforming, laminating and film extrusion
B-602 : Barrier film, 25 micron thickness, PVDC coated
F-101 : Forming film, 25 micron thickness no additives; can be printed, laminated or extrusion coated
N-201 : Non-forming film, 25 micron thickness