CarboBreak - releasing alveolar fibrous carbon fiber fragments / Dominic Kehren in CHEMICAL FIBERS INTERNATIONAL, Vol. 72, N° 1 (03/2022)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > Vol. 72, N° 1 (03/2022) . - p. 31-32 Titre : CarboBreak - releasing alveolar fibrous carbon fiber fragments Type de document : texte imprimé Auteurs : Dominic Kehren, Auteur ; Sabine Plitzko, Auteur ; Daphne Bäger, Auteur ; Anna GroBe, Auteur ; Romy Naumann, Auteur ; Marcel Hofmann, Auteur ; Nuoping Klemm-Zhao, Auteur Année de publication : 2022 Article en page(s) : p. 31-32 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Contraintes (mécanique) Eclatement (matériaux) Essais dynamiques Fibres de carbone -- Propriétés mécaniques Fragmentation Traction (mécanique) Index. décimale : 677.4 Textiles artificiels Résumé : Carbon fibers (CF) are exposed to high mechanical stress within the process chain starting from fiber treatment to textile and composite production up to recycling and reuse. Splinter fractures of the fibers can produce alveolar fragments which, according to the WHO criteria (length >5 pm, diameter <3 pm, length : diameter > 3 : 1), must be assumed to have an asbestos-like effect. So far, it has not been clarified which carbon fibers are proue to this splinter fracture behavior and in which concentration fragments are released. The aim of the CarboBreak project (Funding ID : 03XP0197A) is to gain in-depth knowledge of the fracture behavior of carbon fibers and to investigate the release of respirable fragments under mechanical stress. Note de contenu : - Fig. 1 : Carbon fiber fragments created during tensile testing and shater fracture testing - Fig. 2 : Close-up of the milling head and the clamped specimen and the dust produced after the milling test - Fig. 3 : SEM evaluation of a filter sample from the workplace measurement in the Center for Textile Lightweight Engineering at the STFI En ligne : https://drive.google.com/file/d/1vBUw-IIWQgNUqjkfDBzKKmLHMwYMYg4H/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37395 [article]

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Correlation analysis concerning the physical and mechanical properties of composites made of chromium leather scraps-chloroprene rubber adhesive RL-CR / Dongsheng Xin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 3 (05-06/2023)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 3 (05-06/2023) . - p. 83-87 Titre : Correlation analysis concerning the physical and mechanical properties of composites made of chromium leather scraps-chloroprene rubber adhesive RL-CR Type de document : texte imprimé Auteurs : Dongsheng Xin, Auteur ; Yurui Xin, Auteur ; Yinghua Ma, Auteur Année de publication : 2023 Article en page(s) : p. 83-87 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Allongement à la rupture Assemblages collés Caoutchouc Composites -- Propriétés mécaniques Composites -- Propriétés physiques Cuirs et peaux -- Déchets -- Recyclage Eclatement (matériaux) Humidité -- Absorption:Eau -- Absorption Mouillabilité Perméabilité Polychloroprène Traction (mécanique) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, the pearson product moment correlation coefficient analysis method is used to show that the tensile strength of RL/CR is highly positively correlated with the elongation at break, the bursting height is highly positively correlated with the bursting strength, the tensile strength is highly positively correlated with the bursting strength, and the bursting height is negatively correlated with the elongation at break. The air permeability of RL/CR is not correlated with 15 minutes water absorption, but is negatively correlated with 24 hours water absorption and surface wettability ; The 15 minutes water absorption of RL/CR is negatively correlated with the 24 hours water absorption and the surface wettability ; The surface wettability is positively correlated with 24 hours water absorption. The tensile strength of RL/CR is negatively correlated with air permeability, highly positively correlated with 15 minutes and 24 hours water absorption, and highly negatively correlated with surface wettability. The bursting strength of RL/CR is negatively correlated with air permeability and 15 min water absorption, and highly positively correlated with 24 hours water absorption and surface wettability. Note de contenu : - Introduction to correlation analysis of RL/CR - Theoretical basis of correlation analysis method - Experimental design of the orthogonal preparation of RL/CR and determination of its physical and mechanical properties - Calculation of correlation coefficient of physical and mechanical properties of RL/CR - Correlation analysis of physical and mechanical properties of RL/CR - Table 1 : Factors and levels of orthogonal test - Table 2 : Hot pressing process with orthogonal test - Table 3 : Mechanical properties of orthogonal test - Table 4 : Physical performance of orthogonal test - Table 5 : Correlation analysis of physical and mechanical properties of L5 - Table 6 : Correlation analysis of physical and mechanical properties of L9 - Table 7 : Correlation analysis of physical and mechanical properties of L3 - Table 8 : Correlation analysis of physical and mechanical properties of L5, L9, L3 - Table 9 : Relevance of physical and mechanical properties of RL/CR En ligne : https://drive.google.com/file/d/1Vw7-aw4Zt9ocWQM7WPhmaKQWLEg0gqAG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39577 [article]

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Studies on the correlation between surface and sewability properties of crust leather / C. Niklesh in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 5 (05/2023)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 5 (05/2023) . - p. 175-182 Titre : Studies on the correlation between surface and sewability properties of crust leather Type de document : texte imprimé Auteurs : C. Niklesh, Auteur ; Gladstone Christopher Jayakumar, Auteur ; Phebe Aaron, Auteur Année de publication : 2023 Article en page(s) : p. 175-182 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Allongement (mécanique) Angle de contact Brillance (optique) -- Mesure 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 -- Couture Eclatement (matériaux) Essais de résilience Hydrophilie Post-tannage Traction (mécanique) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The surface properties of leather are critical factors that influence the aesthetic quality of the leather. Commonly, organoleptic properties are evaluated for leathers to ascertain the bulk properties such as compactness, smoothness, softness and general grain appearance. Though these parameters are very subjective, still these properties are essential for leather product manufacture. In the current research, we discuss the correlation between the surface parameters and sewability of the leathers. In our earlier studies, we discussed the influence of syntans and fatliquors on sewability. In aligning to a similar subject, the impact of surface properties has been evaluated through contact angle measurements and correlated with the sewability properties of the leather. From the spread ability measurements, it can be inferred that the sewability properties are better towards the surface of the leather, which is more hydrophilic. This result agrees that the fatliquoringof leathers has enhanced the stitch ability; moreover, the studies provide biophysical parameter importance for qualifying leather sewability. Note de contenu : - MATERIALS AND METHODS : Contact angle analysis - Gloss meter analysis - Sewability analysis - Physical testing of the sample - Optical microscopic studies - RESULTS AND DISCUSSION : Contact angle evaluation - Significance of hydrophibicity - Hydrophilicity on sewability property - Gloss meter evaluation - Microscopic evaluation - Table 1 : Post tanning process - Table 2 : Sewability measurements - Table 3 : Lastometer ball burst test - Grain crack - Table 4 : Tensile strength and elongation measurements DOI : https://doi.org/10.34314/jalca.v118i5.7358 En ligne : https://drive.google.com/file/d/1pIfoadkYHNsVBshv19m5lRJbY9AhD1kX/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39302 [article]

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