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Alternative materials to leather update 2022 / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 55 (09-10/2022)
[article]
Titre : Alternative materials to leather update 2022 Type de document : texte imprimé Auteurs : Karl Flowers, Auteur Année de publication : 2022 Article en page(s) : p. 64-70 Langues : Anglais (eng) Catégories : Composites
Cuir reconstitué
Enduction textile
Textiles et tissus
Tissés
TricotTags : Cuir 'Matériaux alternatifs' Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the past, ILM has written about the latest alternative materials that were beginning to circulate with brands and manufacturers (Flowers, 2018). A myriad of new materials has flooded onto the market and early data suggests that, instead of them disrupting the leather market, they have in fact started impacting the 3.1 trillion sq m synthetic material market. In trying to copy leather, the leather alternative companies find that their consumers seem to identify with their materials more as synthetic materials, rather than genuine leather alternatives.
Litre the altemative-to-meat market, the alternative materials just simply cannot seem to impress the final consumer and, as a result, their performance are stinging investors who cannot seem to draw out a dividend of these start-up companies due to falling share values and poor cash flows.
The materials can be broadly categorised as follows :
- Reconstituted leather composites
- Materials that are woven, knitted or composited (with a coating, as the coating or without a coating)
- Grown sheets (or grown and re-composited).
The history of these materials goes back to the middle of the last century when materials were cast, calendared (formed between two rollers) or coated onto a textile underlay. The early materials were based on polyvinyl chloride and were usually coated onto a woven textile backing (for strength). Early materials were not breathable and were replaced in some instances with poromeric materials (materials that had deliberate pores impregnated into the structure).
The use of leather fibre wastes was also inevitably going to see beneficiation into fabricated sheets that were bonded together to resemble genuine leathers. Coated, laminated and heavily finished leathers also meant that tanners could move low-grade materials through their factory. Foils, laminates and corrected grain finishes produced a range of synthetic-looking materials that blurred what the consumer could discern as leather or not.Note de contenu : - Reconstituted leather fibres
- Woven/knitted/composites/coated textiles
- Woven/knitted
- Compositing
- Misleading ingredient composition
- Gown sheets (or grown and re-composited)En ligne : https://drive.google.com/file/d/1genlk30WeHpT4cc-zaGmFyeAuQu5odlg/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38117
in INTERNATIONAL LEATHER MAKER (ILM) > N° 55 (09-10/2022) . - p. 64-70[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23578 - Périodique Bibliothèque principale Documentaires Disponible Comparative analysis of moisture permeability of natural sheepskin and regenerated leather with temperature and time / Zhong Anhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 5 (09-10/2023)
[article]
Titre : Comparative analysis of moisture permeability of natural sheepskin and regenerated leather with temperature and time Type de document : texte imprimé Auteurs : Zhong Anhua, Auteur ; Chen Xiaoting, Auteur ; Huang Zhuo, Auteur ; Fang Songchun, Auteur Année de publication : 2023 Article en page(s) : p. 186-188 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir reconstitué
Cuirs et peaux -- Analyse
Cuirs et peaux -- Effets de l'humidité
Cuirs et peaux de moutons
Microscopie électronique à balayageIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : This paper mainly compares and analyses the moisture permeability of natural sheepskin and regenerated leather with temperature and time. It was found that the effect of temperature on the moisture permeability of natural sheepskin and regenerated leather was significantly greater than that of time. The performance and trend of moisture permeability of recycled leather under both time and temperature are similar to that of sheepskin as a whole. At a low temperature below 50°C, the moisture permeability of recycled leather is comparable to that of natural sheepskin ; as the temperature rises, its moisture permeability gradually opens up the gap with that of sheepskin. By SEM characterisation, it was found that the fibrous tissues of the natural sheepskin papilla layer were tightly connected and the fibrous tissues of the reticulated layer were loose and disordered ; the recycled leather mainly consisted of crushed fibrous waste and adhesive, and the fibres were stuck with adhesive between them. Note de contenu : - EXPERIMENTAL PROCEDURES : Material preparation - Experimental equipment - Experimental procedure
- RESULTS AND DISCUSSION : Comparison of the effects of different times and temperatures on the moisture permeability of natural sheep leather and regenerated leather - SEM microscopic analysisEn ligne : https://drive.google.com/file/d/19_K5w4JRk7fENRhV_VkOeN0gSwHJCM8I/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39958
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 5 (09-10/2023) . - p. 186-188[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24238 - Périodique Bibliothèque principale Documentaires Disponible Correlation analysis and microscopic simulation of temperature, time and moisture permeability of natural sheepskin and regenerated leather / Zhong Anhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 5 (09-10/2023)
[article]
Titre : Correlation analysis and microscopic simulation of temperature, time and moisture permeability of natural sheepskin and regenerated leather Type de document : texte imprimé Auteurs : Zhong Anhua, Auteur ; Chen Xiaoting, Auteur ; Huang Zhuo, Auteur ; Fang Songchun, Auteur ; Guo Yizi, Auteur Année de publication : 2023 Article en page(s) : p. 183-185 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir reconstitué
Cuirs et peaux -- Effets de l'humidité
Cuirs et peaux -- Effets de la température
Cuirs et peaux de moutons
PerméabilitéIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, the comprehensive effects of environmental temperature and time on the moisture permeability of natural sheepskin and regenerated leather were compared and analysed by using MATLAB fitting and least square method and their regression equations were constructed respectively.
The microstructure comparison shows that both natural and recycled leathers are composed of protein fibres, which have many hydrophilic groups in their chains, therefore both have good moisture permeability which varies significantly with temperature. The moisture permeability of regenerated leather is slightly weaker than that of natural sheepskin leather. The reason is that latex molecules fill between the collagen fibres, which reduces the gaps through which water vapour can pass, while the papillary layer of natural sheepskin has a tight structure and has a wicking effect that regenerated leather does not.Note de contenu : - Correlation analysis between temperature and time of the moisture permeability of natural sheepskin and regenerated leather
- MicrosimulationEn ligne : https://drive.google.com/file/d/1dECUNRpYQHcHuWQNxz85sR9fAtC5hvN5/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39957
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 5 (09-10/2023) . - p. 183-185[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24238 - Périodique Bibliothèque principale Documentaires Disponible Fabrication and characterization of regenerated leather using chrome shavings as raw materials / Cuicui Ding in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 5 (05/2017)
[article]
Titre : Fabrication and characterization of regenerated leather using chrome shavings as raw materials Type de document : texte imprimé Auteurs : Cuicui Ding, Auteur ; Min Zhang, Auteur ; Libo Dai, Auteur ; Yingying Qi, Auteur ; Ronghui Shi, Auteur ; Junhui Yang, Auteur Année de publication : 2017 Article en page(s) : p. 145-152 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse mécanique dynamique
Analyse thermique
Cuir reconstitué
Microscopie électronique à balayage
Polymères en émulsion
Polyuréthanes
Pressage à chaud
ThermogravimétrieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Regenerated leather billet (semi-finished product) was prepared via hot pressing with chrome shaving and environment-friendly polymer waterborne polyurethanes (WPU) as the materials. The influence of WPU/chrome shaving ratios (w/w) on the performance of the billet was investigated by mechanical property test, dynamic thermal mechanical analysis, thermogravimetric analysis, differential scanning calorimetry and field-emission scanning electron microscopy. Furthermore, the ability of heat storage and temperature regulation was endowed for the regenerated leather by the addition of paraffin microcapsules. The results showed that a strong interface interaction could be achieved for the regenerated leather billet, which could be due to the formation of hydrogen bonds and the entanglement between WPU and leather shavings. In this way, WPU/leather shaving composites with favorable mechanical properties, thermal stability, ability of heat storage and temperature regulation were obtained. Note de contenu : - MATERIALS AND METHODS : Materials - Sample preparation - Mechanical properties tests of regenerated leathers - Dynamic mechanical analysis (DMA) - Thermogravimetric analysis (TGA) - Field-emission scanning electron microscopy (FESEM) - Differential scanning calorimetry (DSC) - Dynamic thermal mechanical properties of regenerated leathers - Thermogravimetricc analysis of regenerated leathers - Morphology of regenerated leathers - DSC thermograms of regenerated leathers En ligne : https://drive.google.com/file/d/11sHls5bq_Vn7T2GYgPB0sR1XXAgRmOI6/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28550
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 5 (05/2017) . - p. 145-152[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18894 - Périodique Bibliothèque principale Documentaires Disponible Factors influencing the wet properties of leather board / Yingchua Ma in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)
[article]
Titre : Factors influencing the wet properties of leather board Type de document : texte imprimé Auteurs : Yingchua Ma, Auteur ; Dongsheng Xin, Auteur ; Runting Xia, Auteur ; Shaolan Ding, Auteur ; Fei Ma, Auteur Année de publication : 2020 Article en page(s) : p. 33-38 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caoutchouc
Colles:Adhésifs
Cuir reconstitué
Cuirs et peaux -- Déchets -- Recyclage
Cuirs et peaux de bovins
Humidité -- Absorption:Eau -- Absorption
Mouillabilité
Polychloroprène
Pressage à chaudIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The bonded leather board was prepared by hot pressing. Waste chromed cow leather was used as raw materials and bonded with chloroprene rubber adhesive (CR adhesive). The effect of process factors on the surface wettability and the water absorption under complete immersion conditions of the finished product were studied in this article. The study Pound : When the amount of the CR adhesive was enhanced, the effect was to reduce the surface wettability and the 15 minutes and 24 hours water absorption of the bonded leather; when the temperature increased, the effect was to increase the surface wettability and reduce the 15 minutes and 24 hours water absorption of the bonded leather; the time has no effect on the wet characteristics of the bonded leather; when the pressure was increased, the effect was to reduce the surface wettability of the bonded leather, and the time has no effect on the water absorption. In general, the CR adhesive-prepared bonded leather is an hydrophobic material. Note de contenu : - PREPARATION OF LEATHER BOARD
- WET CHARACTERISTICS OF BONDED LEATHER : The surface wettability - Water absorption
- FACTORS INFLUENCING THE WET CHARACTERISTICS OF THE CR ADHESIVE-PREPARED BONDED LEATHER AND ANALYSIS OF THE EFFECTS : Effects of adhesive sizing amount on the wet characteristics of the bonded leather - Effects of hot-pressing temperature on the wet characteristics of the bonded leather - Effects of hot-pressing time on the wet characteristics of the bonded leather board - Effects of hot-pressing pressure on the wet characteristics of the bonded leather boardEn ligne : https://drive.google.com/file/d/1yHlKuPx20Ceea2-i-kZ7KnQTIaLswbTr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33541
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 1 (01-02/2020) . - p. 33-38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21508 - Périodique Bibliothèque principale Documentaires Disponible Optimisation of preparation process and regulation of properties for composite material made from pineapple leaf fibre-natural latex-regenerated leather (RL-NL-PLF) used as home decor / Fugin Zhou Pengli in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 108, N° 1 (01-02/2024)
PermalinkProperties of regenerated leather prepared using fibrous biomass / Chan-Wook Park in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 108, N° 4 (07-08/2024)
PermalinkReconstituted leather made using a core-shell polyacrylate adhesive / Yi Jie in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 2 (03-04/2013)
PermalinkA 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)
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