Abstract
From the previous issue of this journal, a series of papers summarized on “Plastic Lining-Today's Trends” has started to be published with being focused on their recent topics. To begin with, “FRP water proofing lining technologies and resins” has been reported. In our article entitled “FRP Anti-corrosion Technologies and Resins, ” also have been reported vinylester resins which are being more widely applied by years. Indeed, in this application field, epoxy resins, phenolic resins, furan resins and so forth have been traditionally used. These will be discussed in the later issues focusing on some recent topics.
There are many current topics of vinylester resins even in the field of plastic lining. In this article, therefore, the topics on “Lining in the city water and waste water systems” are mainly discussed. The reason why we intend to have a concern in these systems is as follows : the former system have approved vinylester resins as JWWAK 149. and the latter of sewage systems has the larger size of market.
