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A study on characteristics of lightweight split leather using foam technology / Eun-Chul Shin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 2 (03-04/2023)
[article]
Titre : A study on characteristics of lightweight split leather using foam technology Type de document : texte imprimé Auteurs : Eun-Chul Shin, Auteur ; Young-Woo Kim, Auteur ; Won-Ki Lee, Auteur Année de publication : 2023 Article en page(s) : p. 49-54 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymères
Cuirs et peaux
Fixation (chimie)
Matériaux expansés
Microcapsules
Moussage (chimie)
Pénétration (physique)
Polyacryliques
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Natural leather is traditionally a high-quality material that is widely used for vehicle interior materials (e.g., automobiles, trains and airplanes) and fashion items (e.g., handbags, shoes and gloves). However, it is heavier than materials such as various fibres and synthetic leather, which makes it unsuitable for modern applications that prioritise lightness, portability and fuel efficiency. In addition, animal skins used as raw materials are structured with collagen protein, which limits the ability to ability to reduce the weight by altering the thickness and chemicals used in its preparation. In this study, we investigated the penetration, fixation, and foaming methods of thermally expandable microcapsules (TEM) in leather manufacturing procedures to reduce the weight of natural leather. Dyeing and fatliquoring were suitable processes for applying TEM to leather, and the combined use of acryl polymers enabled TEM to attach efficiently to the leather tissue. The manufacture of foamed leather under conditions of 20% TEM and 3% fixing agent resulted in an increase in the thickness by >20% and enabled the production of foamed leather with excellent physical properties. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Apparatus - Process of leather manufacturing and measuring of physical properties - Measurements
- RESULTS AND DISCUSSION : TEM application experiments for each leather - TEM content-specific application experiments in dyeing/fatliquoring processes manufacturing procedure - Foaming characteristics with time - Fixing agent application experiments
- Table 1 : Characteristics of chemicals
- Table 2 : Expansion ratio according to leather processEn ligne : https://drive.google.com/file/d/1vj_BfNFpV9Ndk1h5_K2xhj5V36BwyZy3/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39062
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 2 (03-04/2023) . - p. 49-54[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24024 - Périodique Bibliothèque principale Documentaires Disponible A study on characteristics of low-density regenerated leather using chromium-tanned shaving waste / Eun-Chul Shin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 2 (03-04/2023)
[article]
Titre : A study on characteristics of low-density regenerated leather using chromium-tanned shaving waste Type de document : texte imprimé Auteurs : Eun-Chul Shin, Auteur ; Young-Woo Kim, Auteur ; Won-Ki Lee, Auteur Année de publication : 2023 Article en page(s) : p. 43-48 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir reconstitué
Cuirs et peaux -- Déchets -- Recyclage
Dérayage
Matériaux expansés
Microsphères
Moussage (chimie)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Shaving scrap is collagen fibre, that is the leather waste occurring during thickness adjustment during the natural leather manufacturing process, and may cause problems such as environmental contamination because of the chromium (Cr) contained when it comes to reclaiming processes. Various studies applying to shaving scrap are currently being conducted in many countries across the world with an initiative by the EU. Amongst those applications, the regenerated leather is being highlighted as a substitute for natural leather. However, since the regenerated leather uses latex as a binder, it accordingly entails a high weight, which is deemed as a disadvantage due to its dense internal tissues compared to other synthetic leathers. To address such disadvantages, this study employed the thermally expandable microspheres (TEMs) to improve its density and light weight by alleviating the internal structure. This is a study on the manufacturing of foamed regenerated leather using shaving scraps. In the study, the shaving scraps were forced to foam at under 100~120°C with consideration for the heat resistance of collagen fibre after applying the thermally expandable microsphere, and then the effect was analysed. In the analysis results, the most effective foaming rate was exhibited when the shaving scraps were treated at under 110°C for 8 minutes using TEMs T110. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Manufacture of regenerated leather - Measurements
- RESULTS AND DISCUSSION : Optimisation of foaming conditions - Foaming studies by microsphere content
- Table 1 : Microsphere used in this study
- Table 2 : SEM images of foaming conditions
- Table 3 : Physical properties according to content of microsphere
- Table 4 : WVP* and density according to content of microsphereEn ligne : https://drive.google.com/file/d/11Uz81wHKO5x9AAvLwpedwpNOepWJST2F/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39063
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 2 (03-04/2023) . - p. 43-48[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24024 - Périodique Bibliothèque principale Documentaires Disponible Study on possibility of oil migration according to fatliquoring agent characteristics / Jae-Hyung Park in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 5 (09-10/2018)
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Titre : Study on possibility of oil migration according to fatliquoring agent characteristics Type de document : texte imprimé Auteurs : Jae-Hyung Park, Auteur ; Young-Woo Kim, Auteur ; Won Ju Kim, Auteur ; In-Kye Paik, Auteur ; Eun-Ji Kim, Auteur ; Hyun-Dae Cho, Auteur ; Hyung-Joon Youn, Auteur ; Han-Do Kim, Auteur ; Eun-Chul Shin, Auteur Année de publication : 2018 Article en page(s) : p. 247-250 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir dans les automobiles
Cuirs et peaux -- Analyse
Cuirs et peaux -- Détérioration
Fourier, Spectroscopie infrarouge à transformée de
Huiles et graisses
Hydrolyse
Produits chimiques -- Migration
Produits de nourriture du cuir
Réflexion totale atténuéeIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The natural leather used for car interior materials is a traditional and high-quality material that can be applied to diverse purposes such as the steering wheel, knob, seat and internal trim. However, continuous friction and sweat from the driver causes the hydrolysis of high-molecular resins and the painted surfaces weakened under the high-temperature conditions of the car interior often lead to slipperiness and increased lustre owning to the migration of the fatliquoring agent. Thus, this study investigated the bonding between the leather and different types of fatliquoring agent, and their influence on oil migration by facilitating ageing (hydrolisis). The results revealed that the silicon- and lecithin-based fatliquoring agents had a significant influence on oil migration owning to the low bonding to the leather under the ageing condition. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials and apparatus - Process of leather manufacturing and measuring of physical properties
- RESULTS AND DISCUSSION : Fat content in leather - Oil migration after hydrolisis - Attenuated total reflection-Fourier transform infrared characterisation of oil migration
- Table 1 : Characteristics of fatliquoring agent
- Table 2 : Process for fatliquoring with chrome-tanned steer hide leather
- Table 3 : Extraction solvents of fat in leather
- Table 4 : Oil contents of leather sample treatment with fatliquoring agent according to extraction solvents
- Table 5 : The results of monitoring of the oil migration on each specimen
- Table 6 : Oil absorption film after oil migration
- Table 7 : Main component of migration oilEn ligne : https://drive.google.com/file/d/1R2nzOqKwZm8GXwa9AsqB8OCMZcyvdHUp/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31108
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 5 (09-10/2018) . - p. 247-250[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20281 - Périodique Bibliothèque principale Documentaires Disponible