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Chrome tannage using high-intensity ultrasonic field
E Mäntysalo1, M Marjoniemi, M Kilpeläinen
1Fiber, Textile and Clothing Science, Fur and Leather Division, Tampere University of Technology, Finland. esa@ee.tut.fi
Ultrasonics Sonochemistry
|April 1, 1997
Summary
This study introduces a rapid chrome tannage method for leather production using ultrasound, reducing process time from hours to minutes. This innovative technique significantly accelerates leather tanning while maintaining quality.
Area of Science:
- Leather Manufacturing
- Materials Science
- Chemical Engineering
Background:
- Traditional chrome tannage for leather production is time-consuming, often requiring several hours.
- Optimizing chrome penetration into hides is crucial for leather quality and durability.
Purpose of the Study:
- To investigate a novel, accelerated chrome tannage process for leather manufacturing.
- To evaluate the efficiency of chrome liquor penetration using a new method.
Main Methods:
- Employing an elastic compression cycle followed by high-intensity ultrasonic irradiation.
- Measuring shrinkage temperature after basification in chrome liquor.
- Analyzing the steepness of the shrinkage temperature-processing time curve to determine chrome penetration efficiency.
Main Results:
- The novel process significantly reduces chrome tannage time to a few minutes.
- An initial slope of approximately 20°C min⁻¹ was observed for the shrinkage temperature-processing time curve.
- Leather stable to boiling was achieved with only 2 minutes in chrome liquor, plus basification and storage.
Conclusions:
- High-intensity ultrasound combined with elastic compression offers a highly efficient method for rapid chrome tannage.
- This accelerated process drastically cuts down production time compared to conventional methods.
- The method provides a quantifiable measure of chrome penetration efficiency, enabling faster leather production.