Bacardit, A.; Olle, L.; Borras, M.D.; Cobos, M.; Jericó, A.; Solé, O. Journal of the Society of Leather Technologists and Chemists Vol. 94, num. 3, p. 117-123 Data de publicació: 2010-06-17 Article en revista
In the current economic climate leather factories need to redesign their processes to add value to their production in order to increase their competitiveness. In this respect, the use of a cross-linker opens up opportunities for the leather industry to obtain both high performance and eco-friendly articles. This study explores the cross-linking reaction between a polycarbodiimide and both acrylic resins and polyurethanes. A comparison of results shows that polycarbodiimide is a very selective cross-linker since it presents both different reticulation speeds and different cross-linking reaction rates depending on the type of binder employed. In addition, and depending on the type of tanned/retanned leather used, different amounts of polycarbodiimide are required in order to obtein optimum results.
Bacardit, A.; Borras, M.D.; Soler, J.; Herrero, V.; Jorge, J.; Olle, L. Journal of the American Leather Chemists Association Vol. 105, num. 2, p. 51-61 Data de publicació: 2010-02-11 Article en revista
Leather is a natural material with many applications: automotive, domestic upholstery, buildings, aviation, maritime, personal safety, etc. For each of these sectors, fire behavior is a field of particular interest. Unfortunately, there are many testing methods and different flammability standards depending on material application and end use. Therefore, there are different ways of approaching the whole flammability issue. In this work, different approaches for analyzing the fire resistance of leather are examined: (i) influence of the type of tannage, (ii) influence of the type of leather, (iii) influence of the type of retannage, (iv) influence of the type of fatliquor, and (v) influence of the use of flame retardants. The results indicate that leather presents natural fire resistance. However, the type of leather, type of tannage, retannage and fatliquor effect the flammability behavior of leather. In addition, the use of flame retardants slightly improves the smouldering properties of leather.