TANNING PROCESS FOR PRODUCING LEATHER WITH HIGH ELASTIC PROPERTIES AND LEATHER OBTAINED

摘要

In a wet phase of the tanning process, the skins or hides are subjected to a treatment of so- called "rubberizing" in which in the treatment environment, whether it be the inside of a drum, a washing machine, a steady tub or other suitable means of treatment, are introduced certain elastomers that penetrate deeply into the dermis giving the leathers peculiar aesthetic and functional properties. The rubberizing procedure preferably occurs according to certain parameters of absolute humidity of the leather, temperature of the bath and duration of treatment, together with the retanning, dyeing or fatliquoring operations and yet may advantageously also be performed at other wet phases of the tanning process, possibly also after the leather has already suffered finishing operations. The tanning process which comprises the rubberizing treatment also includes the subsequent preservation of the leather immersed in water until the beginning of the drying operations which include, preferably, a vacuum drying.