STUDY OF VEGETABLE EXTRACTS EFFECT ON WET-WHITE LEATHER
Journal Title: Revista de Pielărie Încălţăminte - Year 2018, Vol 18, Issue 3
Abstract
Although the worldwide leather production is based on chromium tannage, there is an increasing share of chrome and metal free tannages. This is mainly due to the growing demand for chrome free leathers in the automotive industry. The aim of this work was the study of vegetable extracts effect on the retannage of wet-white leather, produced by the glutaraldehyde and syntan pre-tannage process, evaluating the bath exhaustion and physical-mechanical leather properties. For that, the leather thickness was adjusted to 1.4 mm and a retanning process was applied to small leather pieces by neutralization, retanning with vegetable extracts, dyeing and fat-liquoring. It was shown that the absorption of vegetable extracts by the leather was greater and faster for the hydrolysable tannins (natural chestnut vegetable extract) than for condensed tannins (mimosa vegetable extract). Different vegetable extracts: natural chestnut, sweetened chestnut, quebracho, gambier, mimosa, tara and cashew, were applied in order to evaluate their effects on leather properties. Properties, as physical-mechanical tests for tear strength, and for ball burst test (to evaluate the grain cracking), and leather behavior regarding softness and grain firmness, were evaluated for the different leather pieces.
Authors and Affiliations
Daniela MARTINS, Liliana DUARTE, Vânia F. M. SILVA, António CRISPIM, E. BEGHINI, Filipe CRISPIM
Keywords
Related Articles
- EP ID EP511084
- DOI 10.24264/lfj.18.3.6
- Views 143
- Downloads 0
CLASSIFICATION OF DIABETIC FEET IN TERMS OF RISK OF ULCERATION
Diabetic feet are common complications in diabetes mellitus, but its classification in terms of risk of ulcer based on multiple measures was rear reported. Therefore the aim of this study was to establish a classificatio...
THE DEVELOPMENT OF SHOE DESIGN AND FOOTWEAR SECTOR IN BULGARIAN GEOGRAPHY FROM THE PRE-MILESTONE PERIODS TO THE PRESENT
The footwear has an important role in human life from the past to the present due to its ability to protect the human foot and provide comfortable walking. In time, different nations have created their own national shoes...
CHARACTERISTICS OF CHROME COMPLEXES IN NEUTRALIZING EFFLUENT
In order to explain the reason of chromium released from chrome tanned leather to effluent in neutralizing, the chromium complex composition, structure and property in neutralizing effluent were characterized. Hide powde...
INFLUENCE OF ADDING FUNCTIONALIZED MICROPARTICLES ON THE PHYSICAL-MECHANICAL, STRUCTURAL, AND PROCESSABILITY PROPERTIES OF THERMOPLASTIC RUBBER
The aim of this paper was to assess the influence of powders, modified on the surface with organic-inorganic compounds, on the block copolymer styrene-butadiene-styrene (SBS) type thermoplastic rubber properties, obtaine...
Rigid antimicrobial polymeric composite with PVC matrix and ZnO and TiO2 functionalized nanoparticles
In this paper, rigid antimicrobial polymeric nanocomposites were developed - polymeric material based on chemically functionalized nanoparticles with polydimethylsiloxane (PDMS) – dispersed in a plastomer matrix. By disp...