Effect of Calcium in Delimed Hide on Leather Quality

IF 0.4 4区工程技术 Q4 CHEMISTRY, APPLIED

Journal of The American Leather Chemists Association Pub Date : 2023-03-01 DOI:10.34314/jalca.v118i3.6814

Chao Lei, Xunsen Chen, Yunhang Zeng, Bi Shi

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引用次数: 2

Abstract

The efficient removal of calcium from delimed hide is essential to leather quality, but few reports have elaborated on how residual calcium in delimed hide affects leather quality. In this study, four delimed hides containing different calcium content were first prepared by using ammonium sulfate and sodium gluconate. Energy dispersive X-ray spectrometry results showed that the atomic percentages of calcium on the grain surfaces of the four delimed hides were 8.17%, 4.82%, 2.34%, and 0.25%, respectively. The bating, chrome tanning, and post-tanning performances of the four delimed hides were then analyzed to evaluate the effect of calcium in delimed hide on leather quality. Results showed that the removal efficiency of non-collagenous protein from hide in enzymatic bating, the evenness of chromium distribution, the shrinkage temperature of wet blue, and the physical properties of crust leather all increased as the calcium content of delimed hide decreased. Furthermore, efficient calcium removal from the grain surface of delimed hide played a key role in the color brightness and uniformity of wet blue and crust leather. The results draw our attention to the importance of considering the effectual removal of calcium from delimed hide for obtaining high-quality leather.

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划边皮中钙对皮革质量的影响

从定界皮革中有效去除钙对皮革质量至关重要，但很少有报道详细说明定界皮革中残留的钙如何影响皮革质量。本研究首先用硫酸铵和葡萄糖酸钠制备了4种不同钙含量的定界皮。能量色散x射线光谱分析结果表明，四种划皮颗粒表面钙的原子百分率分别为8.17%、4.82%、2.34%和0.25%。分析了四种定界革的软化性能、铬鞣性能和鞣后性能，评价定界革中钙含量对皮革质量的影响。结果表明，酶解软化皮革中非胶原蛋白的去除率、铬分布均匀性、湿蓝收缩温度和皮皮的物理性能均随着划边皮革钙含量的降低而提高。此外，划边皮颗粒表面钙的高效脱除对湿蓝皮和湿皮的颜色亮度和均匀性起着关键作用。这一结果提醒我们考虑从划边皮革中有效去除钙对于获得高质量皮革的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The American Leather Chemists Association 工程技术-材料科学：纺织

CiteScore

1.30

自引率

33.30%

发文量

审稿时长

3 months

期刊介绍： The Journal of the American Leather Chemists Association publishes manuscripts on all aspects of leather science, engineering, technology, and economics, and will consider related subjects that address concerns of the industry. Examples: hide/skin quality or utilization, leather production methods/equipment, tanning materials/leather chemicals, new and improved leathers, collagen studies, leather by-products, impacts of changes in leather products industries, process efficiency, sustainability, regulatory, safety, environmental, tannery waste management and industry economics.