Study of Adhesion Strength in Waterlogged Wood Treated for Various Impregnating Methods

近年来，人们对淹水木材的保护方法进行了许多研究和开发，其中有一些实际用于出土木制品的保护，如糖醇法、高级醇法和脂肪酸酯法。对于这些新的方法，报道了合适的浸渍周期、尺寸稳定性、材料感觉以及储存时的时间变化等研究结果；另一方面，大多数物品在被一定的物理力量掩埋后变质，进行了修改、破碎和丢失。为了赋予更高的考古资料价值，在药物浸渍加固后，必须进行粘接、补充等工作，以进行重建。许多用新方法保存的物品在许多情况下都是用相同的材料和技术修复，而不考虑粘接特性的差异。在本研究中，通过对胶粘剂弯曲强度的粘接测试，发现环氧型树脂粘合剂的粘接强度不足是显著的，尤其是脂肪酸酯方法，而对于仅由冲压工具制备的胶粘剂的剪切强度测试，乙醇对粘接强度的影响是负面的。此外，用脂肪酸酯法浸渍的试材粘贴在胶粘剂上用于油性表面时，也能获得良好的效果。1)即使是不用水保存的物体，也要控制储存的温度和湿度。2)由于对胶粘剂的不良影响很大，必须小心处理乙醇。3)粘附性问题最严重的是聚乙二醇法和脂肪酸酯法。前者应视储存环境而定。我认为后者可以通过不断检查油性表面上使用的粘合剂来改进。

In recent years, research and development in many conservation methods of waterlogged wood is done, and there are some which are actually used for conservation of excavated wooden artifacts like the sugar alcohol method, the higher alcohol method, and the fatty acid ester method. About these new method, research results, such as the suitable impregnating period, size stability, material feeling, and time-dependent change when storage, are reported.On the other hand, most of objects deteriorate while being buried with a certain physical power, modification, breaking and missing has done. In order to give the higher value as archaeological data, after strengthening by medicine impregnation, the work of adhesion, supplementation, etc. must be done in order to reconstruct. Many of objects conserved by their new methods are restored in many cases by the same material and technique as usual regardless of the difference in the adhesion characteristic.In this research, with the adhesiveness test for flexural strength of adhesives it adhesive strength insufficiency of epoxy type resin adhesives is remarkable in especially the fatty acid ester method, and with the test for shear strength of the sheet prepared from adhesive only by punch tool the ethanol gives negative effect. Furthermore, the good result could be obtained, when the sample wood impregnated with the fatty acid ester method was pasted up on the adhesive for use on oily surface.1) It should manage the temperature and the humidity of storage, even if it is the objects that conserved without using water.2) Since the bad influence to adhesives is remarkable, you have to deal with ethanol carefully.3) "Adhesion" becomes a problem most are the PEG method and the fatty acid ester method. The former should settle by storage environment. I think that it is the latter may be able to improve by continual examining an adhesive for use on oily surface.