An improvement of the technology of manufacturing supple leather through enzymatic plasticizing of a structured semi-finished product

Authors

  • Anatoliy Danylkovych Kyiv National University of Technologies and Design Nemirovich-Danchenko str., 2, Kyiv, Ukraine, 01011, Ukraine https://orcid.org/0000-0002-5707-0419
  • Victor Lishchuk Kyiv National University of Technologies and Design Nemirovich-Danchenko str., 2, Kyiv, Ukraine, 01011, Ukraine

DOI:

https://doi.org/10.15587/1729-4061.2016.73376

Keywords:

enzymatic plasticizing, chrome­tanned semi­finished product, leather material, output area

Abstract

We have developed a technology of enzymatic plasticizing of chrome­tanned semi­finished leather with using protosubtilin G3x in the production of leather. To develop the enzymatic plasticizing technology, the used material was a semi­finished product of the method of chrome tanning after a neutralization process; it had been derived from large pig hides with an average area of 180 dm2 (a weight of 6.8 kg) and cattle (heifers) with an average heavy weight of 24.3 kg. The average area of the finished leather material was 133.0 dm2 and 316.0 dm2. Enzymatic plasticizing was produced by applying protosubtilin G3x at a temperature of 54 oС. Enzymatic plasticizing of semi­finished leather compared with the control technology ensures the formation of the material structure with deformation and plastic properties increased by 28.0–44.0 % and 26.0–43.0 %, respectively from hides of pigs and heavy heifers.

The process of enzymatic plasticizing of chrome­tanned semi­finished leather is enabled by the destruction of hydrogen and natural links between the lateral radicals of collagen macromolecules as a result of forming temporary enzyme­collagen complexes, followed by blocking released functional groups with fat emulsion particles. This twice reduces the duration of mechanical plasticizing after the processes of drying and moisturizing.

The current technology used by the PJSC “Chinbar”, which includes enzymatic plasticizing by enzymaz 10TD, provides an increased output area of the leather material from semi­finished hides of pigs and heavy heifers compared with the control technology, respectively by 3.5 % and 4.0 %, and an opportunity to get an economic benefit of 1.2 thousand UAH and 3.3 thousand UAH per 100 m2 of the finished material.

The use of protosubtilin G3x in the developed technology of enzymatic plasticizing in optimal conditions helps reduce the duration of mechanical plasticizing two times and increase the output area by 6.3 % and 5.4 %, respectively for leather obtained from hides of pigs and cattle, which can provide an economic benefit of 1.86 thousand UAH and 4.45 thousand UAH per 100 m2 of the finished material compared with the control technology.

The developed energy­efficient and more cost effective technology of enzymatic plasticizing of chrome­tanned semi­finished leather from cattle hides and large pig hides can be considered rather promising for introduction into the manufacturing of supple leather materials.

Author Biographies

Anatoliy Danylkovych, Kyiv National University of Technologies and Design Nemirovich-Danchenko str., 2, Kyiv, Ukraine, 01011

Doctor of Technical Sciences, Professor

Department of Biotechnology, leather and fur

 

Victor Lishchuk, Kyiv National University of Technologies and Design Nemirovich-Danchenko str., 2, Kyiv, Ukraine, 01011

Doctor of Technical Sciences, Professor

Department of Biotechnology, leather and fur

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Published

2016-08-24

How to Cite

Danylkovych, A., & Lishchuk, V. (2016). An improvement of the technology of manufacturing supple leather through enzymatic plasticizing of a structured semi-finished product. Eastern-European Journal of Enterprise Technologies, 4(6(82), 18–22. https://doi.org/10.15587/1729-4061.2016.73376

Issue

Vol. 4 No. 6(82) (2016): Technology organic and inorganic substances

Section

Technology organic and inorganic substances

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Copyright (c) 2016 Anatoliy Danylkovych, Victor Lishchuk

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