AUTOMATED CLEAN LEATHER DYEING ASSISTED BY WRINGING, ULTRASOUND AND MICROWAVE

作者：Gong, Ying; Cheng, Kang; Zhang, Tao; Chen, Wuyong^*

来源：Journal of the American Leather Chemists Association, 2011, 106(4): 127-132.

• POWER ULTRASOUND
• DIFFUSION

A "clean" leather dyeing was designed with wringing (8-10kg/cm(2)), ultrasound (28kHz, 2.4W/cm(2)) and microwave (2450MHz, 10W/L). Twenty leathers were successively colored with this method in lab scale. The dye exhaustion (%), the color values and the color rub fastnesses were determined respectively. Also, the grain surface and the cross-section of the leathers were analyzed before and after dyeing. As presented, it only needed 5min to color with this method and the dye exhaustion averages 2.3% a leather, which were helpful for the recycle of the dye solution. The color for the first ten leathers just varied within a small range (Delta E < 1), when the solution was directly recycled without dye replenishment. The color fastnesses reached up to 4-5 scale (dry rub) and 3 scale (wet rub) after the leathers were coated as a common shoe upper finishing formula. Furthermore, the grain and the collagen fibers were not damaged during the dyeing process, which were proved by Scanning Electron Microscope and X-ray diffraction analysis. In short, this clean and quick dyeing is a potential choice for leather dyeing.

• 出版日期2011-4
• 单位四川大学