Method of preserving hides and skins
AssigneeLeatherteq Limited
InventorPeter J. Holicza
Life of this patent
Estimating the term…
Abstract
A method for preserving hides, skins and pelts prior to tanning, without salt-curing. The preliminary steps of washing, fleshing, liming, unhairing, deliming and bating the hides are followed by the steps of fatliquoring, pickling and drying. The method avoids the environmental damage caused by salt-curing. The treated hides are dry, flexible and readily rehydrated for further processing.
Claims10
A method for preserving hides prior to tanning without salt-curing the hides with sodium chloride, in which the hides are subjected to preliminary steps comprising washing, fleshing, liming, unhairing, deliming and bating, characterized in that the method comprises the steps, after the step of bating, of fatliquoring, pickling and lastly drying, wherein either:
- (a) the step of fatliquoring is done before the step of pickling, with an anionic fatliquor that is 1-15% by weight relative to the weight of the hide being fatliquored;
- or
- (b) the step of fatliquoring is done after the step of pickling, with a cationic fatliquor that is 1-15% by weight relative to the weight of the hide being fatliquored;
- or
- (c) the step of fatliquoring comprises a first step of fatliquoring with an anionic fatliquor and a second step of fatliquoring with a cationic fatliquor, the step of pickling is done between said first step and said second step, and the fatliquors are each 1-15% by weight relative to the weight of the hide being fatliquored.
A preserved, washed, fleshed, limed, unhaired, delimed, bated, fatliquored, pickled, dried, untanned, non-salt-cured with sodium chloride hide.
A method for preserving hides prior to tanning, in which the hides are subjected to preliminary steps comprising washing, fleshing, liming, unhairing, deliming and bating, characterized in that the process comprises the steps, after the step of bating, of fatliquoring, pickling and lastly drying.
Dependencies are inferred from the claim text.