The extractions of collagen from tannery wastes by acid, alkali, enzyme, oxidation etc were introduced. The application of collagen fiber in papermaking and its developing tendency were also analyzed.
介绍了采用碱处理法、酸处理法、氧化法、酶处理法等从皮革废弃物中提取胶原蛋白的几种方法，还介绍了这些胶原蛋白在造纸中的应用现状及发展趋势。
Excellent thermal and oxidation stability enable to provide a wider temperature range of applications with lower tendency to form carbon residue.
具有特佳之耐热及氧化稳定性，能在宽阔的温度范围下应用，不容易产生积垢及碳化。
The more the content of residual copper in steel, the more severely the oxidation corrosion occurs on grain boundary and matrix, the greater the hot brittleness tendency;
残余铜含量越高，晶界与基体界面氧化腐蚀越严重，热脆性倾向越大；
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