Abstract:

The principle of compositionality and temperature-response characteristic of shape-memory polyurethane was introduced and a method to describe this shape-memory properties was given. A series of thermo-sensitive shape-memory woven fabrics which have different structure parameters have been developed and tested. The testing results showed that the shape-memory property was not strengthened obviously with the increasing of shape-memory(SM) fiber line density. Moreover, plain woven fabric had the best shape-memory properties, but there were not obvious differences among other woven structures. In addition, with the increasing of fabric tightness, single-way SM fabric shape recovery ratio(SR) would decline and the shape fixity ratio(SF) would rise slightly, but both the SR and SF of two-way fabric would drop. When using bamboo fiber as the warp yarns, the fabric had the best shape-memory property. However, no evident differences were shown when using other fiber as warp yarn. Furthermore, the SR of two-way SM fabic was higher significantly than that of single-way fabric, but the SF of single-way SM fabric was superior to that of two-way fabric. Finally, the results showed that the other way of single-way SM fabric also had shape-memory function but with lower index, and as to fabrics with SM as weft yarn, the SF in warp direction was totally higher than in weft direction.