STUDIES ON WATERPROOFING WET-WHITE LEATHER
Journal Title: Revista de Pielărie Încălţăminte - Year 2018, Vol 18, Issue 2
Abstract
Water resistance remains one of the more difficult goals to attain in leather manufacture. Although much is known from a scientific perspective, a problem persists when waterproofing wet-white leathers. The aim of this work was the study of the effect of different retanning agents on the waterproofing of wet-white leather produced by glutaraldehyde and syntan pre-tannage process. For that, a waterproofing process based in a waterproof fatliquor and a fluorocarbon based chemical, was tested applying different retanning resins, vegetable extracts and a dispersing agent to small leather pieces. Water resistance was evaluated by water absorption during 30 min in a static water bath at 25ºC. It was shown that retanning agents reduce water resistance when compared with the standard process without them. The reduction effect is stronger when a normal retanning acrylic resin, natural chestnut extract, and a dispersing agent are used. The water resistance reduction effect of tara extract, mimosa extract, quebracho extract, melamine resin, dicyandiamide resin and styrene maleic resin is not so evident. This work needs to be continued in order to evaluate other retanning chemicals, pass to a larger scale and then evaluate the water resistance by the common methods of the tanning industry.
Authors and Affiliations
Vânia F. M. SILVA, Mayerlys MONCADA, António CRISPIM, T. CRUZ, Filipe CRISPIM
Keywords
Related Articles
- EP ID EP512822
- DOI 10.24264/lfj.18.2.10
- Views 113
- Downloads 0
APPLICATION OF QFD METHOD IN FITNESS FOOTWEAR PRODUCTION
In order to obtain a better product it is important to integrate the consumer requests in all production levels, starting with research, design and till the end of production process. One of the most popular methods used...
DIFFERENCES IN PLANTAR PRESSURE BETWEEN THE DIABETIC AND HEALTHY SUBJECTS
Since varied thresholds were reported in the literature and in what range of peak pressure is safe was not answered, the aim of this study was to compare the plantar pressure between the diabetic and healthy subjects and...
PRESCRIPTION VARIABLES FOR THE MEDICAL FOOTWEAR
Medical footwear is a medical device used in the conservative treatment of foot and lower limb pathomechanics. The standard EN ISO 9999:2016 - “Assistive products for person with disability-Classification and terminology...
Fatliquoring potentials of sulphonated Hura crepitans L. seed oil
Fatliquors are oil-in-water emulsions required in leather processing for the purpose of leather lubrication. They ensure that the collagenic fibres do not stick together on drying and as a consequence make the leather fl...
ANTIBACTERIAL NANOCOMPOUND BASED ON SILICONE RUBBER. PART I – OBTAINING AND CHARACTERISATION
The purpose of this paper is to develop an antibacterial polymer nanocompound based on silicone rubber reinforced with TiO2 nanoparticles and with added crosslinkers - dicumyl peroxide. The antibacterial nanocompound pol...