TFL Ledertechnik AG

Basel, Switzerland

TFL Ledertechnik AG

Basel, Switzerland
SEARCH FILTERS
Time filter
Source Type

Christner J.,TFL Ledertechnik AG | Doeppert F.,TFL Ledertechnik AG | Fennen J.,TFL Ledertechnik AG | Pelckmans J.T.,TFL Ledertechnik AG
Journal of the American Leather Chemists Association | Year: 2012

Chrome Tanning, being still the most used tanning method, has been challenged more and more in the recent past. The main reasons were questions of sustainability and the fact that chromium VI can be formed in leathers tanned with chromium III compounds. From a technical point of view, many solutions exist for using the chrome tanning agent in a most economical and ecological way. In this paper another way is shown for maximizing the distribution of chromium in the cross section of the hide as well as the exhaustion of chromium from tanning float, thus reducing the total chromium emission into the environment. Also the leaching of chrome from wet blue during retanning operations will be considered. The type of chemicals used and the process conditions play an important role in this regard, as well as the type of chrome tannage used to manufacture the wet blue. Various measures and solutions will be discussed in this presentation. The role of chromium VI in tanning is looked at with special attention to the real risks associated with it. Finally the formation of chromium VI will be discussed as well as methods to prevent its formation. A new additive (anti oxidant), which is able to eliminate existing chromium VI and reduce the likelihood of reformation, will be introduced.


Patent
TFL Ledertechnik GmbH | Date: 2015-01-28

The present invention is directed to a process for retanning leather comprising the steps of:a) providing tanned or pre-tanned leatherb) treating the tanned leather of step a) with a composition comprising hollow microspheres, preferably as an aqueous composition, the hollow microspheres have a true density of from 0.01 to 0.10 g/cm^(3) (25C) and/or a bulk density of the dry powder of 0.005 to 0.06 g/cm^(3) (25C),c) drying, whereby the temperature of the leather during drying does not exceed 75 C.as well as to leather obtained by said process.


Patent
Tfl Ledertechnik Gmbh | Date: 2014-07-25

The present invention is directed to a process for retanning leather comprising the steps of: a) providing tanned or pre-tanned leather b) treating the tanned leather of step a) with a composition comprising hollow microspheres, preferably as an aqueous composition, the hollow microspheres have a true density of from 0.01 to 0.10 g/cm^(3 )(25 C.) and/or a bulk density of the dry powder of 0.005 to 0.06 g/cm^(3 )(25 C.), c) drying, whereby the temperature of the leather during drying does not exceed 75 C. as well as to leather obtained by said process.

Loading TFL Ledertechnik AG collaborators
Loading TFL Ledertechnik AG collaborators