Nitrile butadiene rubber NBR-3308E

Application

It is an environment-friendly nitrile butadiene rubber in line with the requirements of the European Union. It is used for building, refrigeration system and other thermal insulation foaming, oil-resistant sealing and miscellaneous parts,etc.

Analysis Item	Quality Iandex		Test Results	Experiment method
	Superior product	Qualified product
Volatile matter, % (mass fraction)	≤0.50	≤0.70	0.18	GB/T 24131.1-2018  Hot roller method B2
Ash content, % (mass fraction)	≤0.75	≤0.75	0.65	GB/T 4498.1-2013 A
Bound acrylonitrile, % (mass fraction)	32.5~34.5	32.0~35.0	33.6	SH/T 1157.2-2015, Method A
Mooney viscosity, ML (1+4) 100°C	75~85	75~85	81	GB/T 15340-2008 Over Roll Method GB/T1232.1
300% modulus stress (145℃, 50min type 1 sample, speed 500mm/min), MPa	10.4~14.4	10.1~14.7	13.4	GB/T 34685-2017 ASTM IRB No 8 carbon black GB/T 528-2009 Type I cutter
Tensile strength (145°C, 50min type I sample, speed 500mm/min), MPa	≥26.4	≥25.3	28.9
Elongation at break (145°C, 50min Type I sample, speed 500mm/min), %	≥490	≥460	546