真皮革和胶原纤维革的鉴别研究

Identification of Collagen Fiber Leather and Genuine Leather

胶原纤维革是废革屑、皮渣等皮革废弃物的综合再利用。简单通过眼观、手摸和灼烧法等难以鉴别革的类别。借助溶剂法、撕裂法、TGA分析法和SEM法等进行鉴别。研究发现SEM法可以清晰看到革内纤维束的构型;胶原纤维革在溶剂处理下会收缩,天然革形态无变化;胶原纤维革的撕裂强度远远小于天然革,且纵横向撕裂大小差异较小;胶原纤维革的DTG曲线在400℃附近出现一拐点,此拐点是粘合剂的热解点,而天然革在400℃附近曲线光滑。通过以上几种方法可以快速鉴别革的种类。

Collagen fiber leather is reused by waste leather and it has been become one commercial products. It＇s diffi- cult to identify the type of leather by eye observation, hand touching and ignition test, so solvent, tearing, TGA analysis and SEM methods have been used. Especially by SEM method, fiber bundles steric configuration can be found. Research has found that collagen fiber leather will shrink after the solvent treatment and natural leather structure will keep stable; the tear strength of collagen fiber leather is smaller than that of natural leather, and the difference between vertical and horizontal analysis is insignificant. Through the TGA curves, it＇s clear the collagen fiber leather appears a inflection point which is binding agent decomposition point about 400℃.The types of leather can be identified by the above methods.