ALTERNATIVE LEATHER MANUFACTURING PROCESS - 2. ASSESSING THE LEATHER’S ECO-FRIENDLINESS
It is the aim of this paper to assess the eco-friendliness of a bovine leather, obtained by an improved process that consists in pretanning with an oligomer resin, followed by low-offer chrome tannage. Namely, the leather tendency to release the tanning chemical auxiliaries was tested. The followin...
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| Format: | Article |
| Language: | English |
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Editura Universităţii din Oradea
2018-05-01
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| Series: | Annals of the University of Oradea: Fascicle of Textiles, Leatherwork |
| Subjects: | |
| Online Access: | http://textile.webhost.uoradea.ro/Annals/Vol%20XIX-No%202-2018/Pielarie/Art.%20no.%20338-pag.%20143-148.pdf |
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| author | PRUNEANU Melinda BUCIȘCANU Ingrid MAIER Vasilica BĂLĂU-MÎNDRU Iulia |
| author_facet | PRUNEANU Melinda BUCIȘCANU Ingrid MAIER Vasilica BĂLĂU-MÎNDRU Iulia |
| author_sort | PRUNEANU Melinda |
| collection | DOAJ |
| description | It is the aim of this paper to assess the eco-friendliness of a bovine leather, obtained by an improved process that consists in pretanning with an oligomer resin, followed by low-offer chrome tannage. Namely, the leather tendency to release the tanning chemical auxiliaries was tested. The following analyses were performed to quantify the auxiliaries from aqueous leather extracts: total dissolved solids, organic and inorganic soluble matter, UV-VIS spectroscopy, HPLC chromatography. Experimental data indicated high release rates of oligomer and resorcin from the pre-tanned leather, which proves the reversibility of the pretanning process. The release rates of the same compounds after trivalent chrome tanning and retanning was about 4 times lower. This is due to the supplementary complexation effect of the oligomer resin and resorcin upon the trivalent chrome. Pretanning with oligomer resin and resorcin determined the decrease of chrome salt consumption by 50 ÷ 60 % as compared with the conventional chrome tanning technology, and advanced exhaustion of spent floats. Low-offer chrome tanning preceded by pretanning can contribute to the obtaining of eco-friendly leather, mainly due to lower Cr(III) content of finished leather. Consequently, the occurrence in leather of hexavalent chrome Cr(VI), which is one of the most restrictive indicators for leather eco-friendliness, is mitigated. |
| first_indexed | 2024-04-12T16:22:43Z |
| format | Article |
| id | doaj.art-63baa3434aba4c3e8089785b55a26080 |
| institution | Directory Open Access Journal |
| issn | 1843-813X 2457-4880 |
| language | English |
| last_indexed | 2024-04-12T16:22:43Z |
| publishDate | 2018-05-01 |
| publisher | Editura Universităţii din Oradea |
| record_format | Article |
| series | Annals of the University of Oradea: Fascicle of Textiles, Leatherwork |
| spelling | doaj.art-63baa3434aba4c3e8089785b55a260802022-12-22T03:25:29ZengEditura Universităţii din OradeaAnnals of the University of Oradea: Fascicle of Textiles, Leatherwork1843-813X2457-48802018-05-01XIX2143148ALTERNATIVE LEATHER MANUFACTURING PROCESS - 2. ASSESSING THE LEATHER’S ECO-FRIENDLINESSPRUNEANU Melinda0BUCIȘCANU Ingrid1MAIER Vasilica2BĂLĂU-MÎNDRU Iulia3“Gheorghe Asachi” Technical University of Iaşi, Faculty of Textiles, Leather and Industrial Management, Str. Prof. Dr. Doc. Dimitrie Mangeron, No. 29, 700500 Iaşi, Romania“Gheorghe Asachi” Technical University of Iaşi, Faculty of Textiles, Leather and Industrial Management, Str. Prof. Dr. Doc. Dimitrie Mangeron, No. 29, 700500 Iaşi, Romania“Gheorghe Asachi” Technical University of Iaşi, Faculty of Textiles, Leather and Industrial Management, Str. Prof. Dr. Doc. Dimitrie Mangeron, No. 29, 700500 Iaşi, Romania“Gheorghe Asachi” Technical University of Iaşi, Faculty of Textiles, Leather and Industrial Management, Str. Prof. Dr. Doc. Dimitrie Mangeron, No. 29, 700500 Iaşi, RomaniaIt is the aim of this paper to assess the eco-friendliness of a bovine leather, obtained by an improved process that consists in pretanning with an oligomer resin, followed by low-offer chrome tannage. Namely, the leather tendency to release the tanning chemical auxiliaries was tested. The following analyses were performed to quantify the auxiliaries from aqueous leather extracts: total dissolved solids, organic and inorganic soluble matter, UV-VIS spectroscopy, HPLC chromatography. Experimental data indicated high release rates of oligomer and resorcin from the pre-tanned leather, which proves the reversibility of the pretanning process. The release rates of the same compounds after trivalent chrome tanning and retanning was about 4 times lower. This is due to the supplementary complexation effect of the oligomer resin and resorcin upon the trivalent chrome. Pretanning with oligomer resin and resorcin determined the decrease of chrome salt consumption by 50 ÷ 60 % as compared with the conventional chrome tanning technology, and advanced exhaustion of spent floats. Low-offer chrome tanning preceded by pretanning can contribute to the obtaining of eco-friendly leather, mainly due to lower Cr(III) content of finished leather. Consequently, the occurrence in leather of hexavalent chrome Cr(VI), which is one of the most restrictive indicators for leather eco-friendliness, is mitigated.http://textile.webhost.uoradea.ro/Annals/Vol%20XIX-No%202-2018/Pielarie/Art.%20no.%20338-pag.%20143-148.pdfleather tanningclean technologysyntansmelamine-formaldehyde resinswet-white |
| spellingShingle | PRUNEANU Melinda BUCIȘCANU Ingrid MAIER Vasilica BĂLĂU-MÎNDRU Iulia ALTERNATIVE LEATHER MANUFACTURING PROCESS - 2. ASSESSING THE LEATHER’S ECO-FRIENDLINESS Annals of the University of Oradea: Fascicle of Textiles, Leatherwork leather tanning clean technology syntans melamine-formaldehyde resins wet-white |
| title | ALTERNATIVE LEATHER MANUFACTURING PROCESS - 2. ASSESSING THE LEATHER’S ECO-FRIENDLINESS |
| title_full | ALTERNATIVE LEATHER MANUFACTURING PROCESS - 2. ASSESSING THE LEATHER’S ECO-FRIENDLINESS |
| title_fullStr | ALTERNATIVE LEATHER MANUFACTURING PROCESS - 2. ASSESSING THE LEATHER’S ECO-FRIENDLINESS |
| title_full_unstemmed | ALTERNATIVE LEATHER MANUFACTURING PROCESS - 2. ASSESSING THE LEATHER’S ECO-FRIENDLINESS |
| title_short | ALTERNATIVE LEATHER MANUFACTURING PROCESS - 2. ASSESSING THE LEATHER’S ECO-FRIENDLINESS |
| title_sort | alternative leather manufacturing process 2 assessing the leather s eco friendliness |
| topic | leather tanning clean technology syntans melamine-formaldehyde resins wet-white |
| url | http://textile.webhost.uoradea.ro/Annals/Vol%20XIX-No%202-2018/Pielarie/Art.%20no.%20338-pag.%20143-148.pdf |
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