Precision Polymer Engineering R70D Natural Rubber

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Precision Polymer Engineering R70D Natural Rubber
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Natural Rubber, 65-75 °IRHD. Formulated to Defence Standard 93-30, Type QX, Grade 70 (NRQX70). Applications: Natural rubber offers low compression set, high tensile strength, high resilience and excellent resistance to tear and abrasion. The designation `Type QX` indicates that the material is suitable for certain applications where a high degree of compatibility with explosives is a requirement. However, compatibility with all explosives in all environments has not been established and design authorities should seek advice on particular applications from the Director, Defence Research Agency (Military Division), Fort Halstead, Sevenoaks, Kent, TN14 7BP.
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Mechanical Properties	Original Value	Comments

Hardness, Shore A	70	°IRHD; ASTM D1415
	70 - 74	°IRHD, -0/+4 change after 168 hours @ 70°C; ASTM D1415
Tensile Strength, Yield	10.2 MPa	-15% change after 168 hours @ 70°C; ASTM D412
	12.0 MPa	ASTM D412
Elongation at Break	255 %	-15% change after 168 hours @ 70°C; ASTM D412
	300 %	ASTM D412
Compression Set	35 % @Temperature 70.0 °C, Time 86400 sec	ASTM D395

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	100 °C
Minimum Service Temperature, Air	-50.0 °C
Flash Point	>= 300 °C

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PPRECI170 / 57894

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