DuPont Teijin Films Mylar® 840 Polyester Film, 48 Gauge

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DuPont Teijin Films Mylar® 840 Polyester Film, 48 Gauge
Categories:	Polymer; Film; Thermoplastic; Polyester, TP; Polyester Film
Material Notes:	Mylar® 840 is a one-side pretreated polyester film for improved metal or cold seal adhesion. The packaging industry is constantly setting higher standards for product protection using flexible packaging films. Improved barriers as well as package strength and stiffness are key characteristics of Mylar® 840 polyester which has made it a premier packaging film. Approvals: FDA Food Contact Status - All gauges of Mylar® 840 comply with the Food and Drug Administration regulation 21 CFR 177.1630 -- Polyethylene phthalate polymers, sections (f) and (h). These regulations describe films that can safely be used in contact with all types of foods, excluding alcoholic beverages. The films listed above can be used to contain foods during oven cooking at temperatures up to and above 250°F. Information provided by DuPont.
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Physical Properties	Original Value	Comments

Density	1.40 g/cc
Thickness	0.480 mil

Mechanical Properties	Original Value	Comments
Film Elongation at Break, MD	110 %	ASTM D882A
Film Elongation at Break, TD	80 %	ASTM D882A
Coefficient of Friction, Dynamic	0.40	A-B; ASTM D1894
Coefficient of Friction, Static	0.50	ASTM D1894
Film Tensile Strength at Break, MD	32200 psi	ASTM D882A
Film Tensile Strength at Break, TD	39000 psi	ASTM D882A

Thermal Properties	Original Value	Comments
Specific Heat Capacity	1.17 J/g-°C	Typical Mylar®
Melting Point	254 °C	Typical Mylar® via DSC
Maximum Service Temperature, Air	250 °F
Shrinkage, MD	1.26 % @Temperature 150 °C, Time 1800 sec	Unrestrained
Shrinkage, TD	1.28 % @Temperature 150 °C, Time 1800 sec	Unrestrained

Optical Properties	Original Value	Comments
Refractive Index	1.64 - 1.67	typical of Mylar®
Transmission, Visible	88.5 %	TLT; ASTM D1003

Compliance Properties	Original Value	Comments
FDA	Yes	See notes for details.

Descriptive Properties
Bond Strength @ Ambient Conditions (metallized)	750 g	77°F and 50% RH
Gas Permeability (Base film)	1.6 cc/100 in²	Nitrogen; ASTM D1434 (24 hrs @ 77°F and 75% RH @ 1 ATM)
	31.0 cc/100 in²	Carbon Dioxide; ASTM D1434 (24 hrs @ 77°F and 75% RH @ 1 ATM)
Yield (nominal)	42200 in²/lb

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PDTZ9268 / 139590

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