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DuPont Teijin Films Mylar® X842 Polyester Film, 48 Gauge

Category Polymer , Film , Thermoplastic , Polyester, TP , Polyester Film
Manufacturer DuPont Teijin Films (DTF)
Trade Name Mylar®
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF DuPont Teijin Films Mylar® X842 Polyester Film, 48 Gauge.pdf
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Material Notes:
Mylar® X842 is a clear polyester film that has been chemically treated on both sides for the packaging converting market. One side is chemically treated for metal adhesion. The other side is chemically treated for print/PE extrusion. Approvals: FDA Food Contact Status - All gauges of Mylar® X842 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.
Physical Properties Metric English Comments
Density 1.40 g/cc
0.0506 lb/in³
Water Vapor Transmission 43.5 g/m²/day

@Temperature 38.0 °C
2.80 g/100 in²/day

@Temperature 100 °F
90% RH; ASTM F1249
Mechanical Properties Metric English Comments
Film Elongation at Break, MD 110 %
110 %
ASTM D882A
Film Elongation at Break, TD 70 %
70 %
ASTM D882A
Coefficient of Friction, Dynamic 0.40
0.40
ASTM D1894
Film Tensile Strength at Break, MD 214 MPa
31000 psi
ASTM D882A
Film Tensile Strength at Break, TD 290 MPa
42000 psi
ASTM D882A
Thermal Properties Metric English Comments
Specific Heat Capacity 1.17 J/g-°C
0.280 BTU/lb-°F
Typical Mylar®
Melting Point 254 °C
489 °F
Typical Mylar® via DSC
Maximum Service Temperature, Air 121 °C
250 °F
Shrinkage, MD 1.25 %

@Temperature 150 °C,
Time 1800 sec
1.25 %

@Temperature 302 °F,
Time 0.500 hour
Unrestrained
Shrinkage, TD 0.50 %

@Temperature 150 °C,
Time 1800 sec
0.50 %

@Temperature 302 °F,
Time 0.500 hour
Unrestrained
Optical Properties Metric English Comments
Haze 3.5 %
3.5 %
ASTM D1003
Transmission, Visible 90 %
90 %
ASTM D1003
Descriptive Properties Value Comments
Gas Permeability (Base film) 6 cc/100 in2
O2, metallized; ASTM D1434
Yield (nominal) 42200 in2/lb
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