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The Stanley Wolstenholme memorial lecture. The challenge of change / Raymond Blakey in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 6 (11-12/2002)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 6 (11-12/2002) . - p. 229-239 Titre : The Stanley Wolstenholme memorial lecture. The challenge of change Type de document : texte imprimé Auteurs : Raymond Blakey, Auteur Année de publication : 2002 Article en page(s) : p. 229-239 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Industrie et commerce -- Royaume-Uni Production Index. décimale : 675 Technologie du cuir et de la fourrure Note de contenu : - Change - form and future - Britain - a world class economy ? - What is happening to our industry ? - SLTC : where now ? - Global future - Fig. 1 : Let us look at some dictionary definitions of change - Fig. 2 : U.K leather production (million sq. ft) - Fig. 3 : U.K. Leather shoe production (million pairs) - Fig. 4 : Production of bovine hides (million pieces) - Fig. 5 : Production of bovine hides by region (million pieces) - Fig. 6 : Production of bovine leather (million sq. ft.) - Fig. 7 : Production of light bovine leather by region (million sq. ft.) - Fig. 8 : Production of heavy bovine leather ( 000s tonnes) - Fig. 9 : Production of heavy bovine leather by region ( 000s tonnes) - Fig. 10 : Production of sheepskins and lambskins (million pieces) - Fig. 11 : Production of sheepskins and lambskins by region (million pieces) - Fig. 12 : Production of goatskins (million pieces) - Fig. 13 : Production of goatskins by region (million pieces) - Fig. 14 : Production of ovine/caprine leather (millions sq. ft.) - Fig. 15 : Production of ovine/caprine leather by region (millions sq. ft.) - Fig. 16 : Activity index by region - Fig. 17 : Worldwide leather usage (million sq. ft.) - Fig. 18 : Worldwide leather usage % composition En ligne : https://drive.google.com/file/d/1eNuiELclHI1G7aA2_XG83M20a9ugqQW8/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39843 [article]

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Synthesis and application of urea paraformaldehyde polymer as a tanning agent / N. H. El-Sayed in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 6 (11-12/2002)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 6 (11-12/2002) . - p. 240-248 Titre : Synthesis and application of urea paraformaldehyde polymer as a tanning agent Type de document : texte imprimé Auteurs : N. H. El-Sayed, Auteur ; El-Shahat H. A. Nashy, Auteur Année de publication : 2002 Article en page(s) : p. 240-248 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage Analyse sensorielle Copolymère urée formaldéhyde Copolymères -- Synthèse Cuirs et peaux -- Propriétés mécaniques Essais de résilience Essais dynamiques Evaluation visuelle Résistance à la putréfaction Tannage synthétique Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A urea paraformaldehyde polymer has been synthesized under optimum conditions, for use as a tanning agent. The characteristics and effects of this polymer as a tanning agent were investigated. The tensile strength, elongation at break, tear strength, scanning electron microscopy (SEM), shrinkage temperature, shrinkage area, putrefaction resistance and thermal gravimetric analysis (TGA) parameters were studied. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Methods - RESULTS AND DISCUSSION : Polymer synthesis - Scheme 1 : Polymer formula - Scheme 2 : Sulphited polymeric structure - 2- Mechanical Properties - 3- Scanning Electron Microscopy (SEM) - 4- Shrinkage Temperature (ST) - 5- Putrefaction resistance - 6- Thermo Gravimetric Analysis (TGA) of the treated leather - 7- Handle and appearance (Table VI) - 8- Practical Application - Scheme 3 : Application process - Table 1 : Effect of polymer percentages on mechanical properties - Table 2 : Dependence of shrinkage temperature and area on percentage of polymer used - Table 3 : Total soluble proteins of the treated leather after putrefaction - Table 4 : Free amino acids of the treated leather after putrefaction - Table 5 : TGA for raw and tanned leather by chrome and the prepared polymer - Table 6 : Visual evaluation of polymer tanned leather En ligne : https://drive.google.com/file/d/1ze4J_adSjd0DsMbNmgvAeQVkFmancavl/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39844 [article]

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A survey of current bookbinding leathers - Part 2 - organoleptic properties / R. S. Thomson in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 6 (11-12/2002)

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 6 (11-12/2002) . - p. 249-256 Titre : A survey of current bookbinding leathers - Part 2 - organoleptic properties Type de document : texte imprimé Auteurs : R. S. Thomson, Auteur ; T. Codina, Auteur ; F. Ganiari, Auteur ; J. Gopfrich, Auteur ; I. Ionnadis, Auteur ; S. Mehmet, Auteur ; A. Stassinou, Auteur Année de publication : 2002 Article en page(s) : p. 249-256 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Propriétés organoleptiques Evaluation Reliure Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The determination of the overall quality of any type of leather is a subjective assessment depending primarily on the end use to which it will be put. This applies as much to the assessment of bookbinding leathers as to any other material. If one asks a number of bookbinders what makes a good leather, at first sight they each seem to have a different opinion. However, on closer examination these differences appear to arise from how people describe what are complex subjective characteristics rather than actual discrepancies themselves. Individual bookbinders all have personal aesthetic preferences which are associated with the type of grain pattern, colour and the presence or absence of minor surface blemishes. Some bookbinders like to work with skins having a uniform surface appearance. Others prefer more "natural" looking materials. Note de contenu : - Organoleptic Assessment - Table 1 : First stage assessments (in order of priority) - Table 2 : Second stage assessments - Table 3 : Organoleptic assessment results - Table 4 : Organoleptic assessment results Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39845 [article]

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Pressure wet hydrogen peroxide oxidation of chromium sludge / S. Pinho in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 6 (11-12/2002)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 6 (11-12/2002) . - p. 257-262 Titre : Pressure wet hydrogen peroxide oxidation of chromium sludge Type de document : texte imprimé Auteurs : S. Pinho, Auteur ; M. F. Almeida, Auteur ; M. J. Ferreira, Auteur Année de publication : 2002 Article en page(s) : p. 257-262 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Boues résiduaires Déchets -- Elimination Essais (technologie) Oxydation humide Peroxyde d'hydrogène Le peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales. Sédimentation Taguchi, Méthodes de (Contrôle de qualité) Tannage -- Déchets Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : European tanneries generate a large amount of sludge containing chromium and other substances, some of which may be hazardous in post-tanning operations. In the next few years it is expected that landfilling these high organic content residues will be restricted in the EU thus imposing the need for treatment. This work assesses wet oxidation (WO) using hydrogen peroxide as an alternative solution for reducing the volume of sludge and its organic content. The effects of temperature, time, H2O2 dose and pH in the WO of a tannery sludge with chromium are evaluated through laboratory tests carried out in the range of 100-250 oC. Volume of sludge, total solids and volatile solids were determined in the experiments as well as total organic carbon and chromium on most of them. Note de contenu : - EXPERIMENTAL DETAILS : Sludge characteristics - Sedimentation tests - WO experiments - WO blank test - Design of experiments - RESULTS AND DISCUSSION : Characteristics of chromium sludge - Sedimentation tests with chromium sludge - WO blank test - WO experiments - First set of WO experiments - Second and third sets of WO experiments - Selection of temperature, time and H2O2 offer - Table 1 : Results of WO experiments following a 7 factors, 2 levels L8 Taguchi design - Table 2 : Effects of the 7 factors on the performance of WO experiments - Table 3 : Results of the 2nd set of WO experiments following a L4 Taguchi design with temperature, time, pH at the levels of 200/250 oC, 30/120, minutes, pH 1/4 - Table 4 : Effects of the 3 factors on the performance of WO experiments on Table III - Table 5 : Results of the 3rd set of WO experiments following a L4 Taguchi design with temperature, time, pH at the levels of 200/240 oC, 30/120 minutes, pH 2/3 - Table 6 : Effects of the 3 factors on the performance of WO experiments on Table V - Table 7 : Wet oxidation results of a pulp with 2% sludge, initial pH 4, for 15 and 240 minutes at 200oC with different doses of hydrogen peroxide En ligne : https://drive.google.com/file/d/1Lt-W61c8zvLIKmiIYotE7bUGzFDiOkfM/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39846 [article]

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