Difference between revisions of "Fatliquoring of hides and skins"
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=== General description === | === General description === | ||
| + | Leathers must be lubricated to achieve product-specific characteristics and to re-establish the fat | ||
| + | content lost in the previous procedures. The oils used may be of animal or vegetable origin, or | ||
| + | may be synthetics based on mineral oils. | ||
| + | Stuffing is an old technique used mainly for heavier vegetable-tanned leather. The sammed | ||
| + | leather is treated in a drum with a mixture of molten fat. [11, Heidemann 2000] | ||
| + | |||
| + | The retanned, dyed, and fatliquored leather is usually washed before being piled onto a 'horse' to | ||
| + | 'age' (letting the fat migrate from the surface to the interior of the material). | ||
| + | |||
| + | |||
| + | |||
| + | ==== Use of fat recycled from sheepskin degreasing in fatliquors ==== | ||
| + | |||
| + | ''' Description''' | ||
| + | The fatty residue from sheepskin degreasing is used as a partial replacement for sulphonated | ||
| + | fish oil in the preparation of fatliquoring agents. | ||
| + | |||
| + | |||
| + | '''Achieved environmental benefits''' | ||
| + | |||
| + | Reuse of the fat residue from sheepskin degreasing and reduction in the use of raw materials. | ||
| + | |||
| + | |||
| + | '''Economics''' | ||
| + | |||
| + | Partial replacement of an expensive raw material priced at approximately EUR 630 per tonne is | ||
| + | possible. | ||
| + | |||
| + | |||
| + | '''Status of development''' | ||
| + | A demonstration project has been completed. | ||
| + | |||
| + | Reference literature | ||
| + | [133, Inquimica 2003]. | ||
Source: (BAT) Reference Document for the Tanning of Hides and Skins, 2013 | Source: (BAT) Reference Document for the Tanning of Hides and Skins, 2013 | ||
Back to [[Subsection DC leather]] | Back to [[Subsection DC leather]] | ||
Revision as of 09:15, 23 August 2016
Back to Subsection DC leather
General description
Leathers must be lubricated to achieve product-specific characteristics and to re-establish the fat content lost in the previous procedures. The oils used may be of animal or vegetable origin, or may be synthetics based on mineral oils.
Stuffing is an old technique used mainly for heavier vegetable-tanned leather. The sammed leather is treated in a drum with a mixture of molten fat. [11, Heidemann 2000]
The retanned, dyed, and fatliquored leather is usually washed before being piled onto a 'horse' to 'age' (letting the fat migrate from the surface to the interior of the material).
Use of fat recycled from sheepskin degreasing in fatliquors
Description The fatty residue from sheepskin degreasing is used as a partial replacement for sulphonated fish oil in the preparation of fatliquoring agents.
Achieved environmental benefits
Reuse of the fat residue from sheepskin degreasing and reduction in the use of raw materials.
Economics
Partial replacement of an expensive raw material priced at approximately EUR 630 per tonne is possible.
Status of development
A demonstration project has been completed.
Reference literature [133, Inquimica 2003].
Source: (BAT) Reference Document for the Tanning of Hides and Skins, 2013
Back to Subsection DC leather
