STUDIES ON THE PEELING OF THE OUTER BARK OF THE PHLOEM

Abstract

In consequence of some chemical analysis of “Kurokawa” and “Amakawa (structure under cuticle layer)” of Mitsumata and Kozo, we confirmed the fact that the alcoholbenzene extract was much in “Amakawa” of the phloem of them.According to the above result and the consideration about the phloem, we suggested theoretically that the surface active agents were to be effective on the loosening and peeling of the outer bark of it, therefore we carried out laboratory and industrial experiments and found the new effective loosening and peeling method of applying surface active agents instead of the former manual primitive method.On the laboratory test, we used the following surface active agents and obtained good results. - Mikesoap as a commercial soapless soap, alkyl benzene sulphonate as an anionic agent, alkyl polyester alcohol as a nonionic agent, cetyl trimethyl ammonium chloride as a cationic agent.On the industrial trial, in case of Mitsumata, we used the commercial soapless soap and the most suitable industrial treating condition given by authors is as follows.Treating temperature 70 - 120°CAmount of soapless soap 5 - 11% to “Kurokawa”Amount of water 7 - 15 parts to “Kurokawa”Treating time about 60 minutesThen the yield of available fibres from “Kurokawa” increased about 5% in comparison with the former method.