Table 7. Test Result of Mixed Compound with NBR2255 and KNB25LM. (ACN 23.2%)

Property		T-10	T-11	T-12	T-13	T-14	T-15
Hardness(shore A)		67	65	65	64	63	62
Tensile strength(Mpa)		12.8	13.4	13.2	12.6	12.8	12.6
Elongation(%)		275	360	335	335	335	335
Compression set(%)		+27	+27	+28	+29	+28	+29
Ozone-resistance(50pphm, 40°C, 3day)		No Crack	No Crack	No Crack	No Crack	No Crack	No Crack
Low temperature resistance(TR-10)		−47.7	−48.3	−49.6	−50.9	−52.7	−53.0
Heat resistance (120°C, 70hr)	Hardness change(%)	+10	+12	+10	+11	+10	+10
	Tensile strength change(%)	−6.3	−7.5	+13.9	+17.5	+3.9	+2.4
	Elongation change(%)	−40	−50	−38.8	−38.8	−45.1	−44.8
Oil resistance (ASTM IRM 901, 120°C, 70hr)	Hardness change(%)	+4.0	+4.0	+4.0	+5.0	+5.0	+5.0
	Tensile strength change(%)	+3.9	+3.7	+12.1	+14.3	−2.3	+22.2
	Volume change(%)	−3.4	−4.3	−5.2	−5.2	−7.0	−8.5
Oil resistance (ASTM IRM 903, 120°C, 70hr)	Hardness change(%)	−6.0	−5.0	−6.0	−6.0	−5.0	−5.0
	Tensile strength change(%)	−12.5	−9.0	−6.8	−10.3	+1.6	+6.3
	Volume change(%)	+20	+18.3	+19.0	+16.7	+15.4	+13.8