Tailoring the Curing Kinetics of NBR-Based Rubber Compounds for Additive Manufacturing of Rod Seals

Table 6

Numerical values of tensile tests of S2 specimens (from 3D-printing, recipe #3, Batch 3) after vulcanization at 160°C are compared with the results of conventional heat press.

Sample/test direction	Maximum strength (MPa)	Elongation at break (%)	Stress at 50% strain (MPa)
Heated press (conventional)	18.0 ± 0.5	261.4 ± 16.6	3.2 ± 0.1
0° to printing direction	16.0 ± 0.3	282.1 ± 14.1	2.2 ± 0.1
90° to printing direction	9.2 ± 1.0	167.7 ± 15.2	2.0 ± 0.1

The data are based on the median values of a test series each of n = 10.