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本文用凝胶层析法和紫外分光光度法对电影胶片掉胶问题进行了研究,得出初步结论: 1)证实了在电影胶片和加工药液中确实存在着可溶解的明胶(多肽)。 2)在室温下可从商品明胶分离得到“溶胶”和“凝胶”两个组份,“溶胶”由于复性能力较弱而易于降解。 3)提胶温度和深度是影响“溶胶”含量的重要工艺参数,先在45℃下萃取,再在50℃下提胶,可以得到“溶胶”含量很低的明胶产品,但随着提胶过程的继续进行,“溶胶”含量又将逐道增高。
In this paper, gel chromatography and UV spectrophotometry were used to study the problem of plastic film dropping. The preliminary conclusions are drawn as follows: 1) The existence of soluble gelatin (polypeptide) indeed exists in motion picture film and processing liquid. 2) The two components “sol” and “gel” can be separated from the commercial gelatin at room temperature. The “sol” is easily degraded due to the weak refolding ability. 3) The temperature and depth of the gum lift are important process parameters affecting the “sol” content. Extraction at 45 ° C and then at 50 ° C can result in a gelatin product with very low “sol” content. However, Processes continue, “sol” content will increase one by one.