Sumitomo Bakelite North America RX® 640 Fiberglass Reinforced Phenolic Resole

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Sumitomo Bakelite North America RX® 640 Fiberglass Reinforced Phenolic Resole
Categories:	Polymer; Thermoset; Filled/Reinforced Thermoset; Phenolic; Phenolic, Resole, Glass Fiber Filled
Material Notes:	RX® 640 is a fiberglass reinforced, ammonia-free, phenolic resole compound, with good dimensional stability and good strength at elevated temperatures. Meets ASTM D-5948 Type GPI-5. Information supplied by Sumitomo Bakelite North America.
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Physical Properties	Original Value	Comments

Bulk Density	0.80 g/cc	Powder; ASTM D1895
Density	1.76 g/cc	ASTM D792
Water Absorption	0.06 % @Time 86000 sec	ASTM D570
	0.22 % @Time 170000 sec	ASTM D570
Linear Mold Shrinkage	0.002 cm/cm	ASTM D955

Mechanical Properties	Original Value	Comments
Hardness, Rockwell E	90	ASTM D785
Tensile Strength, Ultimate	86 MPa	ISO 527
Flexural Strength	186 MPa	ISO 178
Flexural Modulus	14.5 GPa	ISO 178
Compressive Strength	248 MPa	ISO 604
Charpy Impact, Notched	0.40 J/cm²	ISO 179

Electrical Properties	Original Value	Comments
Dielectric Strength	11.8 kV/mm @Frequency 60 Hz	Wet, step-by-step; ASTM D149
	14.0 kV/mm @Frequency 60 Hz	Wet, short time; ASTM D149
Arc Resistance	160 sec	ASTM D495

Thermal Properties	Original Value	Comments
CTE, linear, Parallel to Flow	14.0 µm/m-°C @Temperature 23.0 °C	TMA; ASTM E381
Thermal Conductivity	0.550 W/m-K	ASTM F433
Maximum Service Temperature, Air	150 °C	UL Temperature Index; UL 746B
Deflection Temperature at 1.8 MPa (264 psi)	280 °C	As Molded; ASTM D648A
	>= 282 °C	Post Baked; ISO 75 A
Flammability, UL94	V-0 @Thickness 1.60 mm
	V-0 @Thickness 3.20 mm

Descriptive Properties
Available Molding Grades	Compression, Transfer, Injection
Color	Black
Form	Granular

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