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Ultrasound-assisted process intensification in leather making : diffusion rate enhancement in retanning process / Venkatasubramanian Sivakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 7 (07/2013)
[article]
Titre : Ultrasound-assisted process intensification in leather making : diffusion rate enhancement in retanning process Type de document : texte imprimé Auteurs : Venkatasubramanian Sivakumar, Auteur ; P. T. Anusha, Auteur ; Radhika Narayan, Auteur ; M. Shravya, Auteur Année de publication : 2013 Article en page(s) : p. 277-287 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption
Cuirs et peaux
Cuirs et peaux -- Finition
Diffusion (physique)
Granulométrie
MélamineLa mélamine, de nom chimique 1,3,5-triazine-2,4,6-triamine, est parfois dénommée cyanuramide ou cyanurotriamine. Sa formule brute est C3H6N6.
Les "résines mélamine-formaldéhyde" ou "mélamine-formol" (sigle MF) sont appelées "mélamine" dans le langage courant. Elles font partie de la famille des aminoplastes qui regroupe des résines thermodurcissables aminées, issues d'un comonomère tel l'urée ou la mélamine, parfois le thiocarbamide, le cyanamide hydrogène ou le dicyandiamide ; le second comonomère étant le formaldéhyde.
Phénols
Polyacryliques
Retannage
Statistique
Syntans
UltrasonsIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Retanning is one of the essential steps in leather processing. It follows the primary tanning process, utilizing synthetic tanning agents (syntans) in order to impart certain functional properties to the final leather. This research study aimed at investigating the effect of ultrasound (US) on the uptake of syntans in the retanning process as compared to magnetic stirring (MS) process control. Different types of syntans based on phenolic, melamine resin and acrylic compound were investigated. The influence of process parameters such as US power, process time, float, syntan offer, US pulse mode were studied. The effects of pre-sonication of substrate (leather) as well as substance (syntan solution though particle size analysis) were also investigated. There was the possibility of about 10% to 60% increase in exhaustion due to the use of US over MS for different syntans under various process conditions. The Apparent Diffusion coefficient (D) of syntan through the leather matrix was calculated from the experimental uptake data, which indicates significant improvement (~1.5 times) in the D value due to US over MS under the given process conditions. Therefore, the present study clearly indicates positive influence of ultrasound on diffusion of these special types of organic compounds (syntans) through more complex porous matrix such as leather, leading to significant improvements in diffusion rate of syntans, considerable savings in process time and subsequent enhancement in the quality of retanned leathers. Note de contenu : - Ultrasound in leather application
- Experimental set-up
- Process details (all the % based on shaved wet-blue weight) - Analytical procedure
- Calculation of process intensification parameters enhancement in uptake of retanning agents
- Diffusion co-efficient of syntans through leather matrix
- Effect of process parameters, effect of ultrasound and type of syntan on uptake on syntan
- Effect of ultrasound on apparent diffusion coefficient of syntans - Effect of ultrasound on substrate : pre-sonication of leather
- Effect of ultrasound on substance : particle-size analysis of syntans - Effect of ultrasound pulse mode
- Effect of combination of syntans
- Effect of retanning with two pieces
- Effect of ultrasound and type of syntan on uptake on syntan (a. phenolic syntan, b. melamine resin syntan, c. acrylic syntan)
- Statistical analysisEn ligne : https://drive.google.com/file/d/1nEKS3fHXRhiWa_xxak8YLWRhXXNFjYET/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19012
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 7 (07/2013) . - p. 277-287[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15337 - Périodique Bibliothèque principale Documentaires Disponible Upgrading keeping leather's elegance / M. Pasquet in WORLD LEATHER, Vol. 18, N° 8 (12/2005 - 01/2006)
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Titre : Upgrading keeping leather's elegance Type de document : texte imprimé Auteurs : M. Pasquet, Auteur ; M. Kurwan, Auteur ; R. Schneider, Auteur Année de publication : 2005 Article en page(s) : p. 25-29 Langues : Anglais (eng) Catégories : Cuirs et peaux -- Défauts
Cuirs et peaux -- Finition
MasquageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Upgrading' is a widely used term in leather manufacturing today. In general, the term describes a masking or covering process that applies to all sorts of leather surface damage. This process can be a mechanical operation (e.g. sand blasting of the base coat) and/or the use of a special chemical system or product. In most cases, upgrading cases place in the first coats of the finishing process so, for this reason, usually includes sophisticated pre-grounds and base coat applications. Note de contenu : - The importance of upgrading
- The central objective
- Components for the successful upgrade of leathers : The pre-base coat - Pre-bottoms and mill grounds - Pre-grounds and grounds - Mechanically generated foam systems - Compact finishing - Thermo-active fillers - Pull-up oils and waxes - Water-based transfer finishing - Colourants and pigments
- Panel 1 : 1/1 : Production line - 1/2 : Split with release paper - 1/3 : Finished split, taken off from the realised paper
- Table : Summary of the most relevant upgrading finishing products respectively finishing techniquesEn ligne : https://drive.google.com/file/d/1_PCoXRTr0j-brebVPMDkCVuJSHIFNhz3/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32500
in WORLD LEATHER > Vol. 18, N° 8 (12/2005 - 01/2006) . - p. 25-29[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006188 - Périodique Bibliothèque principale Documentaires Disponible Upgrading of shoe upper leather in finishing (part 1) in LEATHER INTERNATIONAL, Vol. 211, N° 4794 (10/2009)
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Titre : Upgrading of shoe upper leather in finishing (part 1) Type de document : texte imprimé Année de publication : 2009 Article en page(s) : p. 34-38 Langues : Anglais (eng) Catégories : Chaussures
Cuirs et peaux -- FinitionIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Quite a lot of information has been shared concerning the upgrading of leather. the focus of this article is on shoe upper and fine leathers, but is there a difference between upgrading these leathers and upgrading in general ? Yes and no !
Some points and mechanisms are similar, some are special as Hartmut Huber, technical manager finishing, Clariant Produkte (Deutschland) GmbH reviews the various upgrading techniques.En ligne : https://drive.google.com/file/d/1PssDAdSwxrkWdDMQEaUwWmo67ffVJ7nX/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6484
in LEATHER INTERNATIONAL > Vol. 211, N° 4794 (10/2009) . - p. 34-38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011726 - Périodique Bibliothèque principale Documentaires Disponible Upgrading of shoe upper leather in finishing (part 2) / Harmut Huber in LEATHER INTERNATIONAL, Vol. 211, N° 4795 (11-12/2009)
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Titre : Upgrading of shoe upper leather in finishing (part 2) Type de document : texte imprimé Auteurs : Harmut Huber, Auteur Année de publication : 2009 Article en page(s) : p. 40-42 Langues : Anglais (eng) Catégories : Cuirs et peaux -- Finition Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Finishing of shoe upper leathers by looking in greater detail at pre-base coats, base coats and finishing effects.
En ligne : https://drive.google.com/file/d/1qdV0a2adIJdMb7iiSX5i0zoZj79xI_Ia/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8263
in LEATHER INTERNATIONAL > Vol. 211, N° 4795 (11-12/2009) . - p. 40-42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011936 - Périodique Bibliothèque principale Documentaires Disponible Urethane polymers in leather finishing / John J. McCarthy in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXX (Année 1975)
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Titre : Urethane polymers in leather finishing Type de document : texte imprimé Auteurs : John J. McCarthy, Auteur Année de publication : 1975 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Finition
PolyuréthanesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : As a class of polymers, the polyurethanes are unsurpassed in their versatility, in that products are available covering a wide range of processing and property variations. They are produced today in considerably different physical states and possessing substantially dissimilar physical properties.
They can be divided into three broad classes consisting of foams, coating systems, and millable systems. The millable types can be further divided into groups as cross-linkable rubbers, and thermoplastic and thermosetting polymers. For adhesive and coating formulating, the thermoplastic types are most useful ; and it bas been our experience that the polyester urethanes give better adhesion than the polyether types. These polymers are compatible with a wide range of resins, making it possible to increase adhesion, abrasion, and plating or embossing properties.Note de contenu : - Urethane chemistry
- Raw materials
- Two-component systems
- Elastomers
- Advantages of elastomers in leather finishing
- Urethane aqueous emulsions
- Need for urethanes in leather finishingEn ligne : https://drive.google.com/file/d/1Xah58GI5m4VDixPy4VE7JpxlXjAwD-tH/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38785
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXX (Année 1975)[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008509 - Périodique Archives Documentaires Exclu du prêt Use of natural fat emulsions in fatliquoring process and investigation of fatty spue formation / Gökhan Zengin in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 3 (03/2011)
PermalinkL'utilisation des finissages acryliques réactifs pour les cuirs d'entretien facile / A.-G. Marriott in TECHNICUIR, N° 9 (11/1972)
PermalinkPermalinkUV curing polymers in leather finishing / M. A. Knight in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 62, N° 1 (01-02/1978)
PermalinkUV curing polymers in leather finishing / M. A. Knight in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
PermalinkUV curing polymers in leather finishing / M. A. Knight in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 62, N° 1 (01-02/1978)
PermalinkUV protection against photoageing of garment leathers by ZnO nanoparticles : application of nano ZnO in finishing process as photocatalyst / Bekir Yilmaz in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 6 (11-12/2016)
PermalinkVertically integrated sheepskin processing / Peter Robinson in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 4 (07-08/2010)
PermalinkWater based finishes / John J. McCarthy in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXII (Année 1977)
PermalinkWater based nitro cellulose clear authors special / Mukund Hulyalkar in PAINTINDIA, Vol. LXXI, N° 1 (01/2021)
PermalinkWaterproof leather for high performance footwear / C. D. Hey in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 67 (Année 1983)
PermalinkXIII Kongress der Internationalen Union der Lederchemikere-Verbände / Union Internationale des Sociétés de Chimistes du cuir / IULCS (1973)
PermalinkZinc oxide (Zno) nanoparticles for enhancement of fastness properties in cationic finishing / RamKumar Kothandam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 5 (05/2017)
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