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Rulon Bearings

DuPont Selar® PT 8307 Polyester Barrier Resin  (discontinued **)
Categories: Polymer; Film; Thermoplastic; Polyester, TP; Polyester Film

Material Notes: Selar® PT 8307 is a modified polyester copolymer resin in the high melt viscosity (HMV) series. The HMV modification changes the rheology of the melt and provides better processibility in extrusion operations. It can be processed in conventional extruders designed for polyolefins or polyesters.

Information provided by DuPont Packaging Polymers.

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Physical PropertiesMetricEnglishComments
Density 1.33 g/cc0.0480 lb/in³ASTM D1505
Moisture Vapor Transmission 1.10 cc-mm/m²-24hr-atm2.79 cc-mil/100 in²-24hr-atmMocon Permatran W method
Oxygen Transmission 3.30 cc-mm/m²-24hr-atm8.38 cc-mil/100 in²-24hr-atmASTM D3985
Viscosity Measurement 0.710.71Intrinsic viscosity per DuPont Method (in TFA/CH2 CH12)
 
Mechanical PropertiesMetricEnglishComments
Flexural Modulus 2.76 GPa
@Diameter 3.17 mm
400 ksi
@Diameter 0.125 in
bar; ASTM D790
Secant Modulus, MD 2.10 GPa305 ksiASTM D882
Secant Modulus, TD 2.025 GPa293.7 ksiASTM D882
Impact 6.26.2J/mm Spencer Impact; ASTM D3420
Coefficient of Friction 0.350.35film/film; ASTM D1894
Elmendorf Tear Strength, MD 7.09 g/micron180 g/mil250 µm (10 mil) sheet; ASTM D1922
Film Tensile Strength at Break, MD 62.0 MPa8990 psiASTM D882
Film Tensile Strength at Break, TD 59.0 MPa8560 psiASTM D882
 
Thermal PropertiesMetricEnglishComments
Melting Point 220 °C428 °FDSC/ASTM D3418
Glass Transition Temp, Tg 70.0 °C158 °FASTM D3418
 
Optical PropertiesMetricEnglishComments
Haze 0.20 %0.20 %ASTM D1003
Gloss 100 %100 %45°; ASTM D2457
 150 %150 %20°; ASTM D2457
Transmission, Visible 80 %80 %ASTM D1746
 
Processing PropertiesMetricEnglishComments
Nozzle Temperature 279 °C534 °FExtruder Die
Melt Temperature 271 - 282 °C520 - 540 °F
Drying Temperature 163 - 177 °C325 - 351 °F
Dry Time 6 - 8 hour6 - 8 hourto < 0.005% moisture.

**
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