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Nonwovens applications using lyocelle short curt fibers for wetlaid-spunlace fabrics / Stefanie Schlager in CHEMICAL FIBERS INTERNATIONAL, Vol. 69, N° 4 (12/2019)
[article]
Titre : Nonwovens applications using lyocelle short curt fibers for wetlaid-spunlace fabrics Type de document : texte imprimé Auteurs : Stefanie Schlager, Auteur ; Thomas Maier, Auteur ; Susanne Jary, Auteur ; Shayda Rahbaran, Auteur ; Stephan Kulka, Auteur Année de publication : 2019 Article en page(s) : p. 226-228 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Fibres cellulosiques
Fibres courtes
Filature au mouilléProcédé dans lequel une solution de substance fibrogène est extrudée dans un milieu liquide de coagulation où le polymère est régénéré, comme dans la fabrication de la viscose ou de la rayonne cuproammoniacale.
Lingettes
Nontissés
Papier hygiénique
Résistance à la tractionIndex. décimale : 677.6 Tissus obtenus par des procédés spéciaux, quelle que soit leur composition : jacquard, feutres tissés et non tissés, tapisseries, tissus ajourés Résumé : In this work the possibilities of wetlaid-spunlace wipes containing Lenzing Lyocell short cut fibers that meet the requirements of high-performance nonwovens as well as of quick disintegrating or dispersing wet wipes respectively will be displayed. Note de contenu : - Fig. 1 : Blends for moist toilet tissue (MTT) fabric with wood pulp and cellulosic fibers at different contents. Blends containing lower amounts of Lenzing Lyocell short cut than competitor viscose short cut always show higher tensile strengths in wet state
- Fig. 2 : Blends of 60 g/m2 fabrics containing 20% of 1.4 dtex Lenzing Lyocell short cut fibers show adjustable tensile strengths in a high range by varying the fiber cut length
- Fig. 3 : Extended portfolion of Lenzing Lyocell short cut fibers showing the new development of 1.15 dtex fibers. Model moist toilet tissues of 60 g/m2 containing 20% Lenzing Lyocell shortcut and 80% wood pulp, processed in the same way, show versatile tensile strengths depending on the titer chosen and achieve disintegration requirements already after 30 min
- Fig. 4 : Example of different fluhable wipes of different basis, weight containing 20% of 1.15 dtex 10 mm Lenzing Lyocell short cut fibers and 80% wood pulp. Variation of spunlace energy gives another opportunity to adjust the wet tensile strength
- Fig. 5 : Lenzing Lyocell short cut fibers in high-tenacity fabrics. High tensile strength values are obtained by varying basis weight and spunlace energyEn ligne : https://drive.google.com/file/d/1CH5XMELIKoa_J-85GoUT4syUaqctRSeX/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33593
in CHEMICAL FIBERS INTERNATIONAL > Vol. 69, N° 4 (12/2019) . - p. 226-228[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21388 - Périodique Bibliothèque principale Documentaires Disponible Optimisation of hot-pressing technique for bonded leather with CR adhesive / Yinghua Ma in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 2 (03-04/2020)
[article]
Titre : Optimisation of hot-pressing technique for bonded leather with CR adhesive Type de document : texte imprimé Auteurs : Yinghua Ma, Auteur ; Dongsheng Xin, Auteur ; Runting Xia, Auteur ; Shaolan Ding, Auteur ; Fei Ma, Auteur Année de publication : 2020 Article en page(s) : p. 77-82 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Contre-collage
Cuir -- Collage
Cuirs et peaux -- Déchets -- Recyclage
Latex
Pressage à chaud
Résistance à la tractionIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Large quantities of waste chrome leather shavings are produced during the tanning process. Recycling waste chrome shavings is carried out in a clean, simple, low-consumption manner inspired by the technology of solid wood particle board in the furniture industry, thus making high value products. This paper prepared bonded leather (BL) using CR adhesive and a vulcanising machine, the BL prepared had gond gas permeability, water absorption, and adequate tensile strength, the optimal hot-pressing conditions and formulae used were: (1) latex ratio 20%, 70°C, 5 minutes and 3MPa; (2) latex ratio 23%, 80°C, 4 minutes and 3MPa; (3) latex ratio 18%, 80°C, 5 minutes and 6MPa. Note de contenu : - METHODOLOGY : Main materials - Hot-press forming process - Measurement of physical-mechanical properties for BL
- RESULTS ANALYSIS : Single factor test - Orthogonal testEn ligne : https://drive.google.com/file/d/1IlQ8709yBLKJp57zK_Aiom5y2cA23YqW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33912
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 2 (03-04/2020) . - p. 77-82[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21654 - Périodique Bibliothèque principale Documentaires Disponible Optimization and application of UVC irradiation for prevention of fungal biodeterioration of vegetable tanned and chrome tanned leather / Eshita Jhahan in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 4 (Année 2022)
[article]
Titre : Optimization and application of UVC irradiation for prevention of fungal biodeterioration of vegetable tanned and chrome tanned leather Type de document : texte imprimé Auteurs : Eshita Jhahan, Auteur ; Subarna Bhattacharyya, Auteur ; Anirban Chaudhuri, Auteur ; Nirmal Sarkar, Auteur ; Shaheen Akhtar, Auteur ; Punarbasu Chaudhuri, Auteur Année de publication : 2022 Article en page(s) : 14 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aspergillus
Biodégradation
Cuir
Rayonnement ultraviolet
Résistance à la traction
Tannage au chrome
Tannage végétalIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : UV-C irradiation critically effects the growth of micro-fungi and also deteriorate leather materials. In the present study vegetable tanned and chrome tanned leather were infected with pure cultures of Aspergillus niger and Aspergillus flavus, which were isolated from stored leather materials. UV-C light (λ = 254 nm) was applied on infected leather for 15 and 60 min. The changes in leather qualities were examined through weight, tensile strength, scanning electron microscope, energy dispersive X-ray and Fourier transform infrared spectroscopy study after 15 and 30 days of fungal inoculation. Vegetable tanned leather was more vulnerable in case of fungal attack than chrome tanned leather while A. flavus showed more influence on leather deterioration than A. niger. The results showed that weight loss after 30 days for 15 and 60 min irradiation exposure was 1.3% compared to A. flavus infected leather (3.93%). The tensile strength of vegetable and chrome tanned UV irradiated leather was increased by 44% and 7% respectively. The scanning electron microscopic images exhibit the limited presence of conidiophores in UV-C exposed leather which confirmed the potentiality of irradiation for controlling fungal growth. The infrared spectral analysis of UV-C exposed infected leather samples showed neither shifting of wavenumber nor displacement of any functional groups. Altogether the efficacy of UV-C irradiation against biodeterioration of leather was concluded to be effective. This method can be used to control fungal growth without compromising the leather quality. Note de contenu :
- MATERIALS AND METHODS : Isolation and identification - Biodeterioration study on leather - UV exposure study on fungal infected leather - Analysis
- RESULTS AND DISCUSSION : Weight loss measurement - Physical strength analysis - FT-IR analysis - SEM and SEM–EDX analysis - Conceptual model for UV-C irradiation
- Table 1 : Tensile strength and percentage of elongation at break of vegetable tanned leather sample
- Table 2 : Tensile strength and percentage of elongation at break of chrome tanned leather sample
- Table 3 : Elemental analysis of vegetable tanned leather sample after 30 days
- Table 4 : Elemental analysis of chrome tanned leather sample after 30 daysPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38222
in JOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 4 (Année 2022) . - 14 p.[article]Oxazolidines - A new class of tanning agents / Samir Dasgupta in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61, N° 5 (09-10/1977)
[article]
Titre : Oxazolidines - A new class of tanning agents Type de document : texte imprimé Auteurs : Samir Dasgupta, Auteur Année de publication : 1977 Article en page(s) : p. 97-105 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Chaleur humide
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuir -- Teneur en chrome trivalent
Cuirs et peaux -- Analyse
Cuirs et peaux de moutons
Oxazolidine
Résistance à la déchirure
Résistance à la traction
Tannage au chrome
Tannage combinéLe tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en œuvre par exemple Chrome-Végétal ou Chrome-Synthétique
Tannage végétal
TranspirationIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Oxazolidines are heterocyclic derivatives obtained by the reaction of aminohydroxy compounds with aldehydes. The bifunctional behaviour of these oxazolidines is responsible for their cross-linking reactions with phenols and proteins. Two typical oxazolidines, namely 4,4-Dimethyl-1,3-oxazolidine and 1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane have been studied extensively for their use as tanning agents and it has been found that both these oxazolidines react with hide protein and impart special characteristics to leather when tanned in conjunction with syntan, chrome or vegetable tanning materials.
4,4-Dimethyl-1,3-oxazolidine has been found especially suitable for pretanning of greasy pickled sheepskins, subsequently to be degreased with aqueous degreasing systems. Pickled sheepskin even at 3-5 % level of application gives shrinkage temperatures around 70-75°C within an hour of treatment and unlike glutaraldehyde, the pretanned leather remains natural white and so may be finally tanned with syntan or zirconium for white leather.
1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane on the other hand has been found suitable for chrome or vegetable combination tannages of all kinds of leather, especially wool skin tannages where the wool remains spotless white even if the pH of the exhaust chrome liquor moves up to 4.5. Vegetable tanned leather pre-treated with 1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane gives higher degree of tannage, higher shrinkage temperature and about 50 % lower water solubles than conventional tannage. Normal vegetable tanned leather when retanned with about 10 % of 1-Aza-3,7-dioxa-bicyclo-5-ethyl (3,3,0) Octane for an hour gives a shrinkage temperature around 100°c. Fuither, it has been found that the use of oxazolidine affords better utilisation of chrome when used in chrome tanning. The reduced chrome content in the exhaust liquors helps in pollution control.Note de contenu : - EXPERIMENTAL : Effect of initial pH and time - Effect of concentration - Tannage in combination with chrome - Tannage in combination with vegetable tanning materials - Comparison with glutaraldehyde-chrome combination tannages. Oxazoliding I vs. glutaraldehyde on pretannages of skins - Oxazolidine II vs. Glutaraldehyde on chrome tanning of sheepskins - Oxazolidine II vs. glutaraldehyde on vegetable tannage of sheepskins
- Table 1 : Typical properties of oxazolidines
- Table 2 : Chrome content of finished leather
- Table 3 : Tear strength of finished leather
- Table 4 : Tensile strength of finished leather
- Table 5 : Effect of moist heat on leather
- Table 6 : Effect of perspiration solution on leather
- Table 7 : Tensile strength of vegetable tanned crust leather
- Table 8 : Tear strength of vegetable tanned crust leather
- Table 9 : Chemical analysis of vegetable tanned crust leather
- Table 10 : Effect of moist heat on vegetable leather
- Table 11 : Effect of perspiration solution on vegetable tanned leatherEn ligne : https://drive.google.com/file/d/1G6mpUYSZp3ekgWrtLRMORyPSpD2O_avE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34125
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61, N° 5 (09-10/1977) . - p. 97-105[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007114 - Périodique Bibliothèque principale Documentaires Disponible Oxazolidines - A new class of tanning agents / Samir Dasgupta in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
[article]
Titre : Oxazolidines - A new class of tanning agents Type de document : texte imprimé Auteurs : Samir Dasgupta, Auteur Année de publication : 1978 Article en page(s) : p. 97-105 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Chaleur humide
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuir -- Teneur en chrome trivalent
Cuirs et peaux -- Analyse
Cuirs et peaux de moutons
Oxazolidine
Résistance à la déchirure
Résistance à la traction
Tannage au chrome
Tannage combinéLe tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en œuvre par exemple Chrome-Végétal ou Chrome-Synthétique
Tannage végétal
TranspirationIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Oxazolidines are heterocyclic derivatives obtained by the reaction of aminohydroxy compounds with aldehydes. The bifunctional behaviour of these oxazolidines is responsible for their cross-linking reactions with phenols and proteins. Two typical oxazolidines, namely 4,4-Dimethyl-1,3-oxazolidine and 1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane have been studied extensively for their use as tanning agents and it has been found that both these oxazolidines react with hide protein and impart special characteristics to leather when tanned in conjunction with syntan, chrome or vegetable tanning materials.
4,4-Dimethyl-1,3-oxazolidine has been found especially suitable for pretanning of greasy pickled sheepskins, subsequently to be degreased with aqueous degreasing systems. Pickled sheepskin even at 3-5 % level of application gives shrinkage temperatures around 70-75°C within an hour of treatment and unlike glutaraldehyde, the pretanned leather remains natural white and so may be finally tanned with syntan or zirconium for white leather.
1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane on the other hand has been found suitable for chrome or vegetable combination tannages of all kinds of leather, especially wool skin tannages where the wool remains spotless white even if the pH of the exhaust chrome liquor moves up to 4.5. Vegetable tanned leather pre-treated with 1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane gives higher degree of tannage, higher shrinkage temperature and about 50 % lower water solubles than conventional tannage. Normal vegetable tanned leather when retanned with about 10 % of 1-Aza-3,7-dioxa-bicyclo-5-ethyl (3,3,0) Octane for an hour gives a shrinkage temperature around 100°c. Fuither, it has been found that the use of oxazolidine affords better utilisation of chrome when used in chrome tanning. The reduced chrome content in the exhaust liquors helps in pollution control.Note de contenu : - EXPERIMENTAL : Effect of initial pH and time - Effect of concentration - Tannage in combination with chrome - Tannage in combination with vegetable tanning materials - Comparison with glutaraldehyde-chrome combination tannages. Oxazoliding I vs. glutaraldehyde on pretannages of skins - Oxazolidine II vs. Glutaraldehyde on chrome tanning of sheepskins - Oxazolidine II vs. glutaraldehyde on vegetable tannage of sheepskins
- Table 1 : Typical properties of oxazolidines
- Table 2 : Chrome content of finished leather
- Table 3 : Tear strength of finished leather
- Table 4 : Tensile strength of finished leather
- Table 5 : Effect of moist heat on leather
- Table 6 : Effect of perspiration solution on leather
- Table 7 : Tensile strength of vegetable tanned crust leather
- Table 8 : Tear strength of vegetable tanned crust leather
- Table 9 : Chemical analysis of vegetable tanned crust leather
- Table 10 : Effect of moist heat on vegetable leather
- Table 11 : Effect of perspiration solution on vegetable tanned leatherEn ligne : https://drive.google.com/file/d/1G6mpUYSZp3ekgWrtLRMORyPSpD2O_avE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35215
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 97-105[article]Exemplaires (1)
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