Abstract
A new form of dismantlable adhesisve technology has been developed.This is a revolutionary development in the construction industry, which makes it possible for the bonded compound of building materials to be separated by the simple application of heat after use and therefore to boad apted to recycling.Heating over 100℃ causes the adhesive polymer to soften, and at the same time the thermally expansive particles expand, resulting in loss of bond strength and thus enabling their easy separation.This article describes the dismantlement behavior of joints having the adherends of steel plate and these materials (cement board, plaster board, and plastic board).At the elastomer type dismantlable adhesive, the weight fraction of thermally expansive particles from 5 to 15% is suitable for both bond strength and dismantlement.The bond strength of joints could not decrease after durability test at 60℃ for 30days, and then it was separated easily by infrared rays heating at 150～180℃ or 2 minutes.At this technology, manufacturing is equal to conventional adhesives, and time of heating for dismantlement is quite short, so that it is efficient for not only performance (adhesive and dismantlement), but also manufacturing and cost.
