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Green evaluation method of leather production under river ecological environment : Comparison of eco-indicator 99 and CML2001 evaluation methods / Fan Shan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 4 (07-08/2023)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 4 (07-08/2023) . - p. 129-133 Titre : Green evaluation method of leather production under river ecological environment : Comparison of eco-indicator 99 and CML2001 evaluation methods Type de document : texte imprimé Auteurs : Fan Shan, Auteur ; Wang Yujuan, Auteur Année de publication : 2023 Article en page(s) : p. 129-133 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chaussures -- Conception et construction Chaussures -- Industrie -- Aspect de l'environnement Cours d'eau -- Salubrité Cuirs et peaux -- Industrie -- Aspect de l'environnement Ecologie des eaux Environnement -- Etudes d'impact Evaluation Procédés de fabrication Production Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : With the advancement of science and technology and increasing industrialisation, more and more the waste produced by industry has entered the natural and ecological environment, especially with reference to the environmental pollution effects on freshwater rivers and their surroundings and this River ecological environment is gradually deteriorating. The development of the leather manufacturing industry as represented by shoe industry has caused serious damage to the environment. In order to explain the concept of green production based on the River ecological environment, the article compares the situation of River ecological environment and resource consumption in actual leather production based on Eco-indicator99 and CML2001 evaluation methods. The results show that both the Eco-indicator99 and CML2001 evaluation methods are helpful to evaluate and study the manufacturing process of leather products more completely and at the same time we are able to put forward measures to improve production. Note de contenu : - STATE OF THE ART - METHODOLOGY : River ecological environment analysis method - Eco-indicator99 and CML2001 evaluation analysis - RESULTS ANALYSIS AND DISCUSSION - Fig. 1 : Assessment of river ecological environment based on leather production - Fig. 2 & 3 : Environmental impact factors - Table 1 : Influence of type of normalisation and weight - Table 2 : Normalised effects of actual leather footwear on ecological environment En ligne : https://drive.google.com/file/d/1QNZmR2lEeIFU47oAjc7kKe5nJowYQVJm/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39685 [article]

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Establishment of mathematical model for the influence of physical and mechanical propertis of RL-CR composites / Yinghua Ma in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 4 (07-08/2023)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 4 (07-08/2023) . - p. 134-138 Titre : Establishment of mathematical model for the influence of physical and mechanical propertis of RL-CR composites Type de document : texte imprimé Auteurs : Yinghua Ma, Auteur ; Yurui Xin, Auteur ; Dongsheng Xin, Auteur Année de publication : 2023 Article en page(s) : p. 134-138 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caoutchouc Colles:Adhésifs Composites -- Propriétés mécaniques Composites -- Propriétés physiques Cuirs et peaux -- Déchets -- Recyclage Modèles mathématiques Polychloroprène Produits et matériaux recyclés Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, the AHP (Analytic Hierarchy Process ) method is used to establish the mathematical model of four influencing factors, namely the amount of sizing, hot pressing temperature, hot pressing pressure and hot pressing time, regarding the physical and mechanical properties and comprehensive properties of RL/CR (RL recycled leather, CR chloroprene rubber adhesive). The analysis shows that the influencing laws of each factor on the total physical and mechanical properties of RL/CR and each of the typical physical and mechanical properties is basically consistent. The influence weights in order from high to low are: the amount of sizing, hot pressing pressure, hot pressing temperature and hot pressing time, among which the influence of hot pressing time on RL/CR performance is very weak and can be ignored. Note de contenu : - Clarify the problem and establish a hierarchical structure - Single ranking level, construct judgment matrix - Check the consistency of the judgment - Calculate the single ranking influence weight of factors on each physical and mechanical properties of RL/CR - Establish mathematical models of physical and mechanical properties of RL/CR - Establish the total mathematical model of physical and mechanical properties of RL/CR - Analysis of model - Fig. 1 : The arrangement structure style of properties and factors of RL/CR - Table 1 : The tablet and its meanings of the judgement matrix - Table 2 : The random index of 1~9 room of positive and negative matrix - Table 3 : The influence of factors on physical and mechanical properties of RL/CR En ligne : https://drive.google.com/file/d/1Yi0O5QgV1cbX8-vCVuaoPPb7P9b_ZNAR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39686 [article]

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Preparation and property analysis of composite plate for furniture decoration made from regenerated leather, CR adhesive and pineapple leaf fibre (RL/CR/PLF) / Yali Ou in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 4 (07-08/2023)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 4 (07-08/2023) . - p. 139-144 Titre : Preparation and property analysis of composite plate for furniture decoration made from regenerated leather, CR adhesive and pineapple leaf fibre (RL/CR/PLF) Type de document : texte imprimé Auteurs : Yali Ou, Auteur ; Hongwei Yi, Auteur ; Yinghua Ma, Auteur Année de publication : 2023 Article en page(s) : p. 139-144 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ameublement -- Conception et construction Ananas et constituants Caoutchouc Colles:Adhésifs Composites à fibres végétales Composites à fibres végétales -- Propriétés mécaniques Composites à fibres végétales -- Propriétés physiques Etudes comparatives Matériaux -- Régénération Plaques (ingénierie) Polychloroprène Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this experiment, composite furniture decoration plate was prepared by a hot pressing process with pineapple leaf fibre added into the composite material made using Regenerated leather/Chloroprene Rubber Adhesive (RL/CR/PLF). It was found that the best appearance of the composite plate was that prepared by adding 15% pineapple leaf fibre. Compared with the composite plate without pineapple leaf fibre, it was found that the tensile strength, elongation at break, collapse height, collapse strength and air permeability were reduced compared with the original, while the water permeability, surface wettability and water absorption were greatly improved. Note de contenu : - PREPARATION OF COMPOSITE PLATE : Made with regenerated leather, CR adhesive and pineapple leaf fibre (RL/CR/PLF) - Preparation of RL/FR/PLF composites plates - APPEARANCE OF RL/CR/PLF - MECHANISM ANALYSIS OF INFLUENCE OF PINEAPPLE LEAF FIBRE SUPPLEMENTAL LEVEL ON RL/CR/PLF PROPERTIES - ANALYSIS OF PHYSICAL AND MECHANICAL PROPERTIES OF RL/CR/PLF COMPOSITE PLATE : Comparative analysis of mechanical properties of RL/CR/PLF and RL/CR - Comparative analysis of the physical properties of CR/PLF and RL/CR - Table 1 : The physical and mechanical properties of RL/CR/PLF and RL/CR En ligne : https://drive.google.com/file/d/17KU-NRVqlOkZEyasTU7cJmeec7sXOQgO/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39687 [article]

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Comparative analysis of the mechanical properties of cattle leather in different parts / Zhong Anhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 4 (07-08/2023)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 4 (07-08/2023) . - p. 145-147 Titre : Comparative analysis of the mechanical properties of cattle leather in different parts Type de document : texte imprimé Auteurs : Zhong Anhua, Auteur ; Huang Zhuo, Auteur ; Zhou Meng, Auteur ; Chen Xiaoting, Auteur ; Fang Songchun, Auteur Année de publication : 2023 Article en page(s) : p. 145-147 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux de bovins Microscopie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Because of its inherent growth, the cattlehide varies from one part to another. The purpose of this study is to test and analyse the mechanical properties of different parts of cattlehide. It was found that : the same piece of cattlehide has a large difference in mechanical properties in the transverse direction and in the longitudinal direction. Fracture strength: neck > butt > belly, elongation at break : butt > belly > neck, tensile strength : butt > neck > belly. Fibre density is positively correlated with the fracture strength. The fibre density of the belly was 53% with poor bundling. The butt had a fibre density of 59%, with good bundling and large pores between fibres. The fibre density of the neck was 65%. There were small pores between fibres with loose fibre weaving, and disordered fibre arrangement. Differences in the structural shape of the fibres in the corium layer resulted in differences in the strength of the components. Note de contenu : - EXPERIMENTAL PROCEDURE : Experimental parameters - Experimental materials and apparatus - RESULTS AND DISCUSSION : Analysis of the stress-strain curves for different parts - Comparison of the mechanical properties of different parts - Characterisation of different parts by microscopy - Microscopic molecular analysis of three parts En ligne : https://drive.google.com/file/d/10XKMt60gISMkg8x5JmekXZjDw_sZgKs-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39688 [article]

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Influence of the collagen fibre bundle arrangements on the qualitative aspect of Nile Tilapia (Oreochromis niloticus) leather in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 4 (07-08/2023)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 4 (07-08/2023) . - p. 148-157 Titre : Influence of the collagen fibre bundle arrangements on the qualitative aspect of Nile Tilapia (Oreochromis niloticus) leather Type de document : texte imprimé Année de publication : 2023 Article en page(s) : p. 148-157 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux de Poissons Essais de résilience Essais dynamiques Peau -- Histologie Retannage Tannage Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Mechanical tensile and tear tests are used for qualitatively evaluating leather. The tests express the physical response of the tanned collagen fibre bundles subjected to stretching. Unlike mammals, the collagen fibre bundles in fishskins form overlapping layers, oblique to each other. This arrangement can influence the mechanical behaviour of the material and, therefore, must be taken into account when establishing the specimenʼs directions. Despite this peculiarity and due to the absence of specific technical norms for the position and preparation of specimens for testing, qualitative research with fish leather has used parameters established for mammals. Thus, this study aimed to verify the influence of the collagen fibre bundle arrangement as observed by scanning electron microscopy (SEM), on the qualitative aspects of Nile Tilapia (Oreochromis niloticus) leather. The skins were tanned with chrome, associated with oxazolidine. Tilapia leathers were analysed for their physical-mechanical properties, adopting cut directions of parallel, perpendicular, dorsal-ventral and ventral-dorsal, all with reference to the Tilapia cephalocaudal axis. Skin and leather evaluation through scanning electronic microscopy (SEM) revealed layers with continuous fibres bundles interspersed by layers of continuous fibres arranged in an oblique direction. The data revealed no statistical difference for the side (right and left) from which the specimens were taken. However, different behaviours of tensile strength, percentage elongation, and tear strength were observed. The tensile strength of the orange-brown leather was higher for the perpendicular direction and lower for cutting in the parallel direction. Regarding stretching, the parallel cut presented the highest value, lower for the dorsal-ventral and ventral-dorsal cuts. As for tear strength, higher values, were observed for the perpendicular and ventral-dorsal cuts. Results showed the influence of skin organisation on leather resistance and the need for method standardisation, elaborating specific norms for the qualitative evaluation of fish leather. Note de contenu : - MATERIAL AND METHODS - RESULTS AND DISCUSSION : Proximate composition of Tilapia skin - Histological Tilapia skin analysis - Scanning Electron Microscopy (SEM) of Tilapia leather - Qualitative properties of Tilapia leather - - Table 1 : Technical dagta of reagents used in Tilapia skin tanning process - Table 2 : Pre-tanning process conditions of Tilapia skin - Table 3 : Tanning process conditions of Tilapia skin - Table 4 : Retanning process conditions of Tilapia leather - Table 5 : Proximate composition of Tilapia skin - Table 6 : Data on tensile strength, percentage of elongation and tear strength of dark brown Tilapia leather - Table 7 : Data on tensile strength, percentage of elongation and tear strength of orange-brown Tilapia leather En ligne : https://drive.google.com/file/d/1j9G655gXEqUbT4gfDS_f3N6YBWNyVNs7/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39689 [article]

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Optimisation of cationic starch modified bioflocculant for the removal of total nitrogen from tannery wastewater / Guangyu Ran in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 4 (07-08/2023)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 4 (07-08/2023) . - p. 158-163 Titre : Optimisation of cationic starch modified bioflocculant for the removal of total nitrogen from tannery wastewater Type de document : texte imprimé Auteurs : Guangyu Ran, Auteur ; Zihan Zhao, Auteur ; Jinpin Dai, Auteur ; Jinwei Hu, Auteur ; Peng Yang, Auteur ; Huilin He, Auteur ; Changqing Zhao, Auteur Année de publication : 2023 Article en page(s) : p. 158-163 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amidon cationique Biofloculant Eau -- Épuration -- Élimination des composés organiques Eaux usées -- Epuration Eaux usées -- Teneur en azote total Tannage -- Déchets Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Tannery wastewater contains a high concentration of total nitrogen, and its direct discharge will lead to eutrophication of water bodies, thus the treatment of total nitrogen in tannery wastewater has become the focus of environmental protection. In this paper, total nitrogen removal rate in tannery wastewater was investigated as an index, and sm-A3 cationic starch was used as an initiator to optimise the modification process of flocculant produced by Bacillus cereus CZ1001. In the modification optimisation process, single-factor optimisation experiments and orthogonal optimisation experiments were conducted on the dosage of cationic starch, bioflocculant, initiator, reaction time, reaction temperature, pH and rotational speed of the reaction system. The results showed that with cationic starch (2mL) 0.3 g/L, bioflocculant (25mL) 4.5g/L, initiator (0.02mol/L) dosage 2mL, reaction time in the first stage 7.5min, reaction temperature 55°C and the reaction system pH7.0, the highest total nitrogen removal rate of 89.22% was achieved for the tannery wastewater, and finally, we produced a cationic starch modified bioflocculant with high nitrogen removal rate. This research result reduced the environmental impact of tannery wastewater and broadened the treatment pathway of tannery wastewater. Note de contenu : - EXPERIMENTAL PROCEDURE : Material and method - RESULTS AND DISCUSSION : Single-factor optimisation of modified conditions - Orthogonal optimisation of modified conditions - Table 1 : ANOVA test for second stage reaction time - Table 2 : Factor level table for preparation of cationic starch modified bioflocculant - Table 3 : Experimental design and range analysis of cationic starch modified bioflocculant - Table 4 : Analysis of variance for cationic starch modified bioflocculants En ligne : https://drive.google.com/file/d/1Ukunt4ZZUNREcNbMjL24hIny7DOLMTkU/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39690 [article]

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