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Short term preservation of hide using vacuum: influence on properties of hide and of processed leather.

Gudro I, Valeika V, Sirvaitytė J - PLoS ONE (2014)

Bottom Line: The microorganisms act for all storage times, but the action is weak and has no observable influence on the quality of hide during the time period mentioned.The hide shrinkage temperature decrease is negligible, which shows that breaking of intermolecular bonds does not occur.Optical microscopy, infrared spectroscopy and differential scanning calorimetry also did not show any structural changes which can influence the quality of leather produced from such hide.

View Article: PubMed Central - PubMed

Affiliation: Textile Material Technology and Design Institute, Riga Technical University, Riga, Latvia.

ABSTRACT
The objective of this work was to investigate vacuum influence on hide preservation time and how it affects hide structure. It was established that vacuum prolongs the storage time without hide tissue putrefaction up to 21 days when the storage temperature is 4°C. The microorganisms act for all storage times, but the action is weak and has no observable influence on the quality of hide during the time period mentioned. The hide shrinkage temperature decrease is negligible, which shows that breaking of intermolecular bonds does not occur. Optical microscopy, infrared spectroscopy and differential scanning calorimetry also did not show any structural changes which can influence the quality of leather produced from such hide. The qualitative indexes of wet blue processed under laboratory conditions and of leather produced during industrial trials are presented. Indexes such as chromium compounds exhaustion, content of chromium in leather, content of soluble matter in dichloromethane, strength properties, and shrinkage temperature were determined. Properties of the leather produced from vacuumed hide under industrial conditions conformed to the requirements of shoe upper leather.

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IR spectra of vacuumed hide samples stored 1 day (A) and 22 days (B).
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pone-0112783-g004: IR spectra of vacuumed hide samples stored 1 day (A) and 22 days (B).

Mentions: Furthermore, possible changes of the supermolecular structure during storage under vacuum were investigated. FTIR spectroscopy (Fig. 4, Table 4) and DSC analysis (Fig. 5, Table 5) were carried out for this purpose. The structural changes reflect in the FTIR spectra as changes of individual bands in both position and intensity [31]. A comparison of the peak area values allows a conclusion to be drawn about the formation of functional groups and the degradation or formation of bonds during hide storage. The most typical bands in the spectra were chosen for evaluation of structural changes.


Short term preservation of hide using vacuum: influence on properties of hide and of processed leather.

Gudro I, Valeika V, Sirvaitytė J - PLoS ONE (2014)

IR spectra of vacuumed hide samples stored 1 day (A) and 22 days (B).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4231101&req=5

pone-0112783-g004: IR spectra of vacuumed hide samples stored 1 day (A) and 22 days (B).
Mentions: Furthermore, possible changes of the supermolecular structure during storage under vacuum were investigated. FTIR spectroscopy (Fig. 4, Table 4) and DSC analysis (Fig. 5, Table 5) were carried out for this purpose. The structural changes reflect in the FTIR spectra as changes of individual bands in both position and intensity [31]. A comparison of the peak area values allows a conclusion to be drawn about the formation of functional groups and the degradation or formation of bonds during hide storage. The most typical bands in the spectra were chosen for evaluation of structural changes.

Bottom Line: The microorganisms act for all storage times, but the action is weak and has no observable influence on the quality of hide during the time period mentioned.The hide shrinkage temperature decrease is negligible, which shows that breaking of intermolecular bonds does not occur.Optical microscopy, infrared spectroscopy and differential scanning calorimetry also did not show any structural changes which can influence the quality of leather produced from such hide.

View Article: PubMed Central - PubMed

Affiliation: Textile Material Technology and Design Institute, Riga Technical University, Riga, Latvia.

ABSTRACT
The objective of this work was to investigate vacuum influence on hide preservation time and how it affects hide structure. It was established that vacuum prolongs the storage time without hide tissue putrefaction up to 21 days when the storage temperature is 4°C. The microorganisms act for all storage times, but the action is weak and has no observable influence on the quality of hide during the time period mentioned. The hide shrinkage temperature decrease is negligible, which shows that breaking of intermolecular bonds does not occur. Optical microscopy, infrared spectroscopy and differential scanning calorimetry also did not show any structural changes which can influence the quality of leather produced from such hide. The qualitative indexes of wet blue processed under laboratory conditions and of leather produced during industrial trials are presented. Indexes such as chromium compounds exhaustion, content of chromium in leather, content of soluble matter in dichloromethane, strength properties, and shrinkage temperature were determined. Properties of the leather produced from vacuumed hide under industrial conditions conformed to the requirements of shoe upper leather.

Show MeSH
Related in: MedlinePlus