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Mention de date : 01-02/2011
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A new antifungal agent for the leather industry : S-Hexyl-S'-Chloromethyl-cyanodithiocarbimate (CHED) / Stephen D. Bryant in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 1 (01-02/2011)
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Titre : A new antifungal agent for the leather industry : S-Hexyl-S'-Chloromethyl-cyanodithiocarbimate (CHED) Type de document : texte imprimé Auteurs : Stephen D. Bryant, Auteur ; Elton L. Hurlow, Auteur ; Marilyn Whittemore, Auteur Année de publication : 2011 Article en page(s) : p. 7-10 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antifongiques
Cuirs et peaux -- Conservation
CyanodithiocarbimatesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Raw hides are a rich source of fats and proteins that may serve as metabolic substrates for micro-organisms, especially bacteria and fungi. These micro-organisms that are capable of invading the hide for its nutrients are present on the fresh hide during harvest as well as from the surrounding environment during and after processing at the tanner. Fungal attack on tanned collagen changes the chemical composition of the pelt in the area of growth. These changes along with fungal pigmentation will usually cause discolouration or spots or various colours depending on the infesting organism. This fungal discolouration is difficult to correct and can spoil crust or finished leather. To protect tanned hides (such as wet-blues, vegetable-tanned, free-of-chrome, or oil-tanned lathers), a fungicide is added during the pickle or tanning process. The fungicide must survive the conditions of tannage and adhere to the surface of the tanned hide to protect the leather from the time the tanningprocess is complete until the tanned hide is processed further and finished into a dry leather product. In order to be effective for the leather industry the fungicide should be stable under acid conditions, reasonably stable to UV-light, relatively unreactive with other tanning process chemicals, andhave a high affinity for the hide or skin substrate.
Historically the leather industry made use of chemistries such as organomercurials and chlorophenates which are now banned because of high level dangers regarding environment and human exposure. In recent decades these have been replaced with effective and safer chemistries such as : 2-(thiocyanomethylthio)bentothiazole (TCMTB), 3-iodopropynylbutylcarbamate (IPCB), n-octylisothiazolinone (OIT), diiodomethyl-p-tolylsulfone (DIMTS), and some phenolics.
A needs exists in the leather industry for new compounds that not only are effective fungicides, but also survive the chemical environment of the tanning process. In addition, a valuable strategy for microorganism control is to combine two ormore microbicides to expand the spectrum of control as well as to exploit potential synergies in the biocidal actions This paper describes chemical, biological, and toxicological properties of a new antifungal compound in a class of chemistry known as cyanodithiocarbimates. A patent for the use of this chemistry as a fungicide in the lather industry has been granted.En ligne : https://drive.google.com/file/d/13WPPwLTSkbZpqPvi5mpRyBNX55JUWBD7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10814
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 1 (01-02/2011) . - p. 7-10[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012825 - Périodique Bibliothèque principale Documentaires Disponible Chrome tanning in supercritical carbon dioxide / Cheng Haiming in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 1 (01-02/2011)
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Titre : Chrome tanning in supercritical carbon dioxide Type de document : texte imprimé Auteurs : Cheng Haiming, Auteur ; Chen Min, Auteur ; Liao Longli, Auteur ; Li Zhiqiang, Auteur Année de publication : 2011 Article en page(s) : p. 11-15 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dioxyde de carbone
Fluides supercritiques
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The leather industry is facing a serious problem with water pollution. To eliminate pollution by tanneries' wastewater, carbon dioxide supercritical (SCF-CO2) was put forward to substitute for water as leather making medium. The results showed that chrome tanning in SCF-CO2 medium is an effective new clean method for leather making. In order to achieve a leather with good qualities, the parameters of chrome tanning in SCF-CO2 medium should be controlled so that the chrome tanning temperature is up to 31°C, the initial pH value of the sample was 3.0-3.5 and it was tanned for 2 hours. The tanning procedure could be shortened to 2 hours compared to a traditional time of approximately 20 hours. SCF-CO2 medium has the ability to open up collagen fibres, and it plays a role in the penetration of chrome tanning agents into skin and their fixation to collagen. This research reveals the potential of chrome tanning by using much less water than current technology. En ligne : https://drive.google.com/file/d/1ELx56UypIAv1q92ysaAfh3UnOAH9v_G2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10815
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 1 (01-02/2011) . - p. 11-15[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012825 - Périodique Bibliothèque principale Documentaires Disponible Investigation techniques and conservation methods for historical parchment document / Gomaa Abdel-Maksoud in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 1 (01-02/2011)
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Titre : Investigation techniques and conservation methods for historical parchment document Type de document : texte imprimé Auteurs : Gomaa Abdel-Maksoud, Auteur Année de publication : 2011 Article en page(s) : p. 23-34 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antiquités (objets anciens) -- Conservation et restauration
Cuirs et peaux -- Conservation
Cuirs et peaux de moutons
Fourier, Spectroscopie infrarouge à transformée deIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The historical document studied dates back to the Mamluk period (807-848 AH). It consists of seven pieces and is preserved in the Egyptian National Archives stores. The document suffers from serious damage. Many aspects of deterioration were recorded such as discoloration, warping, stains from different sources, missing parts and gaps. This study aims to document aspects of the deterioration, explain the deterioration mechaism and apply conservation methods.
Non-destructive methods of investigation such as isolation and identification of fungi, shrinkage temperature by using a microscope with a hot table technique and Fourier Transform Infrared Attenuated Total Reflection (FTIR-ATR) were used for damage assessment. The conservation methods used were fixing the ink, disinfection, cleaning, flattening and tensioning, repair of parchment, sewing and preparation for storage. The results of invetigation techniques proved that the deterioration differed in varied parts of the document. The conservation methods improved the appearance andrevealed the aesthetic values of the document.
Historical background : The historical parhcment document studied dates back to the Mamluk period (807-848 AH). It belonged to Khond Tatar(daughter of Eynas El-Yossefy). It is stored in the Egyptian National Archives. It consists of seven differently sized pieces. Both the face and back of each piece are inscribed with carbon ink.Note de contenu : Investigation / Conservation techniques
- CONDITION OF AND DETERIORATION ASPECTS OF THE PARCHMENT
- MATERIALS AND METHODS : New parchment - Isolation and identification of fungi - Measurement of the shrinkage temperature - Fourier Transform Infrared attenuated total reflection (FTIR-ATR).
- RESULTS AND DISCUSSION : Isolation and identification of fungi - Measurement of the shrinkage temperature - Fourier Transform Attenuated Total Reflection (FTIR-ATR).
- CONSERVATION AND METHODS : 1. Solubility test of ink used - 2. Fixing of ink - 3. Disinfection - 5. Flattening and tensioning of the parchment document - 6. Repair of parchment document - 6. The repair of holes and missing parts - 7. Sewing.En ligne : https://drive.google.com/file/d/1WihMuT7yxwEXO10pkhDwlfgTfnCxNDKX/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10816
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 1 (01-02/2011) . - p. 23-34[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012825 - Périodique Bibliothèque principale Documentaires Disponible Contamination of used soak/unhairing baths by nitrogen in comparison with carbon and soluble protein contents in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 1 (01-02/2011)
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Titre : Contamination of used soak/unhairing baths by nitrogen in comparison with carbon and soluble protein contents Type de document : texte imprimé Année de publication : 2011 Langues : Anglais (eng) Catégories : Azote
Bain de trempe
Carbone organique total
Eaux usées -- Analyse
ProtéinesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Contamination of used soak/unhairing baths by nitrogen in comparison with carbon and soluble protein contents --- The leather industry generates highly contaminating liquid effluents with current process methods. In this work, the contamination by nitrogen in wastewater was evaluated for two of the most nitrogen generating steps of beamhouse processing, the soaking and the unhairing/liming steps. Total Kjedahl nitrogen (TKN), ammoniacal nitrogen (N-NH3), total organic carbon (TOC) and soluble protein analyses were realized from bath samples collected at varying times. It was observed that in long duration soaking, nitrogen liberation to the bath eventaully levels out whilst, in unhairing/liming, the nitrogen content did not stabilize even with 27 hours processing.
It was possible to observe a relatioship between nitrogen liberation, TOC and soluble protein contents of the soaking baths.En ligne : https://drive.google.com/file/d/1DHV89FHygImMNUcR-fHJ6_yj7U5YCOB1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10817
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 1 (01-02/2011)[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012825 - Périodique Bibliothèque principale Documentaires Disponible Influence of mechanical properties of sheep nappa leathers on seam efficiency / K. Phebe in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 1 (01-02/2011)
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Titre : Influence of mechanical properties of sheep nappa leathers on seam efficiency Type de document : texte imprimé Auteurs : K. Phebe, Auteur ; Palanisamy Thanikaivelan, Auteur ; K. Krishnaraj, Auteur ; B. Chandrasekaran, Auteur Année de publication : 2011 Article en page(s) : p. 16-22 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Contraintes (mécanique)
Cuir -- Couture
Cuir pleine fleur
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de moutonsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Sewability is one of the essential parameters influencing the garment making process as well as the quality of the final product. In this work, sewability of sheep nappa leathers was measured in terms of seam efficiency and was correlated with related mechanical properties. Seam efficiency was found to be between 44 and 99 % for the sheep nappa leathers employed in this study. Among the various mechanical properties studied, elongation at break seems to influence the seam efficiency significantly as evidenced from the correlation coefficient value of 0.99. While tensile strength and seam strength aslo had fairly good relation with seam efficiency with correlation coefficient values greater than or equal to 0.90. Formability, breaking strength and stitch tear strength (double hole) exhibited a correlation coefficient of >-0.80 with seam efficiency, indicating a high dependency. While most of these parameters had direct relation with seam efficiency, indicating a high dependency. While most of these parameters had direct relation with seam efficiency, initial tensile modulus had an inverse relation. Flexural rigidity did not show any significant relation with seam efficiency. The results obtained in this study would form a basis for designing and fabricating of leather garments. Note de contenu : - EXPERIMENTAL METHODS : Materials
- TEST METHODS : Flexural rigidity - Fabric tensile strength and elongation at break - Initial tensile modulus - Formability - Seam strength - Breaking strength - Stitch tear strength (double hole) - Seam efficiency.
- RESULTS AND DISCUSSION : Seam efficiency - Seam efficiency versus seam strength - Seam efficiency versus stitch tear strength (double hole) - Seam efficiency versus breaking strength - Seam efficiency versus tensile strength - Seam efficiency versus percentage elongation at break - Seam efficiency versus flexural rigidity - Seam efficiency versus initial tensile modulus - Seam efficiency versus formability.En ligne : https://drive.google.com/file/d/12GhBwNaV4lpEj1zi_pn3PAEp-2JOWx3i/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10818
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 1 (01-02/2011) . - p. 16-22[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012825 - Périodique Bibliothèque principale Documentaires Disponible
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Code-barres | Cote | Support | Localisation | Section | Disponibilité |
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012825 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |