Tir«$tone A N N O U N C E S A N E W
HIGH
IMPACT
468
CHEMICAL
AND
ENGINEERING
NEWS
RESIN
with optimum properties at minimum cost
EXON 872
Exon 872—the latest result of Firestone laboratory development program—is a pure resin, composed of tough, rigid modified styrene alloy. Thiis new resin has exceptional physical properties and costs less than resins of comparable quality. Exon 872 can be easily compounded and proc essed—readily, calendered, compression or transfer molded. Products made from Exon 872 can be machined, sawed, drilled, tapped, turned, sanded and cemented. Calendered sheets can be embossed,
polished, laminated and vacuum drawn in sheet or plate form. Colors can be blended directly into the formulation. The combination of properties found in Exon 872 makes it suitable for a wide variety of uses including hardware, electrical equipment, parts for automo biles, refrigerators, toys, radios and television sets. For further information about Exon 872—or any member of the ever-growing Firestone line—write or call Chemical Sales Division.
EXON 8 7 2 CALENDERING A N D L A M I N A T I N G TYPE Average Physical Properties of Laminated Sheets* Rockwell Hardness R81 Tensile Strength, psi 3400 Elongation, % 10 to 15 Heat Distortion @ 66 psi, °C. 88 to 89 Flexural Modulus, psi 2.8 χ 10 5
Izod Impact Strength, ft. Ibs./in. Notched, Vs" Bar + 25°C. 5.0 - 25°C. 2.8 Specific Gravity 1.01
^•Physical properties were obtained by cutting the test specimens from laminated stock in such a manner that the length dimensions were parallel to the grain of the calendered stock.
Bmom
Fusion Temp., °F. Calendering Temp., °F.
Processing Conditions: 280-300 Laminating Temp., °F. Forming Temp., °F. 340-350
355 355
CHEMICAL SALES D I V I S I O N DEPT. 21Ε · FIRESTONE PLASTICS COMPANY, POTTSTOWN, PA· VOLUME
3 2, N O .
6
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FEBRUARY
8,
1954
469
