ELEMENTAL ANALYSIS OF FINAL MIXES OF TECH NICAL RUBBER GOODS BY LASER-INDUCED EMISSION-SPECTROMETRY

Laser-induced emission spectral analysis (LIESA) developed by Krupp as an in-stream elemental analysis method with broad applications has be en investigated towards its applicabilities and limits for the quality control of final mixes of technical rubber goods for the automotive i ndustry (RELMA, remote laser microanalysis). In particular the correla tion of RELMA data with physical parameters was of great interest. It could be demonstrated that beside detection of mistakes in weighing an d detection of mixing inhomogeneities, the identification of particles and the control of incoming raw material are attractive RELMA potenti als in the chemical laboratory. Except for rheovulcametry a number of physical tests can be omitted. In contrast to the tyre factory, on-lin e monitoring of mixes for technical rubber goods is not possible due t o great matrix variety and frequent recipe changes.