Table 3 : Properties of radial inner liner containing different parts per hundred rubber (phr) either reclaimed (RR) or crumb (CR).

Phr of reclaimed rubber (RR) or
crumb rubber (CR)
Tension property test Rebound % Specific gravity
g/ml
Hardness (SI unit) Oscillating disk cure meter test Mooney
scorch
(m.m)
300% Modulus (MPa*) Tensile
(MPa*)
Elongation % L min
(dN.m)§
Tsc
(m.m)#
L max (dN.m) CR¤
(m.m)
zero 13.4 18.7 430 100.0 1.165 64.0 12.3 1.43 70.7 2.23 37.14
20 RR 12.8 17.9 439 93.2 1.160 63.0 13.2 1.50 68.8 2.28 36.34
25 RR 12.7 17.2 442 92.9 1.160 63.0 13.7 1.53 68.0 2.32 35.84
30 RR 12.3 16.7 445 91.7 1.160 62.5 14.3 1.57 67.3 2.35 35.32
35 RR 11.7 16.0 449 90.2 1.155 62.0 14.8 1.60 66.7 2.38 35.15
40 RR 11.3 15.5 451 89.0 1.155 62.0 15.5 1.65 66.0 2.45 34.44
20 CR 12.8 17.6 436 95.2 1.160 63.5 13.3 1.50 68.3 2.30 36.03
25 CR 12.6 17.1 439 94.5 1.160 63.5 13.8 1.53 67.7 2.32 35.34
30 CR 12.1 16.5 444 93.9 1.155 63.0 14.5 1.57 67.3 2.35 35.21
35 CR 11.6 15.8 446 93.6 1.155 63.0 15.2 1.62 66.7 2.40 34.93
40 CR 10.9 15.1 450 93.3 1.155 62.5 15.7 1.63 66.0 2.42 34.81
specifications Not <12.5 Not <17 Not <380 Not <70 1.153-1.173 59-67 9-17 1.05-1.85 65-79 1.9-2.7 Not <25

*MPa Mega Pascal (pressure measurement unit)                                                           
§Minimum torque in deci-neuton per meter        
#Scorch Time in minute per minute
¤Cure Rate     

Hussein et al.Journal of Environmental Engineering and Ecological Science  2014 3:5DOI : 10.7243/2050-1323-3-5