Oil extracted from seal hides: characterization and use as leather fat liquor

Extracting natural grease from leathers and skins is a necessary process designed to avoid the appearance of undesirable blemishes in finished articles. Also, degreasing of pickled skins is an important preliminary step in which excess fats are removed. Fat content of some skins is high. In this pap...

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Bibliographic Details
Published in:Journal of the American Oil Chemists' Society 1998-08, Vol.75 (8), p.1015-1019
Main Authors: Cuq, M.H. (Institut National Polytechnique Ecole Nationale Superieure de Chimie Laboratoire de Catalyse Chimie Fine et Polymeres, Toulouse, France.), Benjelloun-Mlayah, B, Delmas, M
Format: Article
Language:English
Subjects:
ACEITES ANIMALES
ANIMAL OILS
Anionic surfactant
Applied sciences
Chemical industry and chemicals
chrome tanning
CUERO
CUEROS Y PIELES
CUIR
CUIRS ET PEAUX
degreasing
Exact sciences and technology
EXTRACCION
EXTRACTION
fat‐liquoring
FOCA
HIDES AND SKINS
HUILE ANIMALE
LEATHER
lipids
Miscellaneous
oil characterization
Oils and fats
PHOQUE
seal oil
SEALS
sulfation
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Summary:Extracting natural grease from leathers and skins is a necessary process designed to avoid the appearance of undesirable blemishes in finished articles. Also, degreasing of pickled skins is an important preliminary step in which excess fats are removed. Fat content of some skins is high. In this paper, we study the characteristics of the extracted fatty substances from seal skins. Extracted fats, which were considered waste, can be used as fat liquors in leather manufacture. The primary function of leather lubricant is to prevent adhesion of the leather fibers and to influence the degree of fiber cohesion that takes place during drying of wet leathers. In mineral tannage or semimineral tannage (e.g., semi‐chrome), this is achieved by the fatliquoring of leather, for which purpose mostly anionic emulsifiable oil products are used. Seal oil is made into an emulsifiable anionic product by sulfation or by addition of anionic emulsifiers. We tested these products in lambskin fat‐liquoring and we studied the physical properties of leather and fatty spue (white efflorescences that appear sometimes on the surface of leather) formation after aging for 3 mon. The oil extracted from seal skins has good characteristics as fat liquor, and the quality of the resulting leather is comparable to leathers fat‐liquored with a commercial reference material.
ISSN:0003-021X
1558-9331
DOI:10.1007/s11746-998-0280-8