Trial spinning was done at 11 blending ratios (of Outlast fiber/cotton), namely 0/100, 10/90, 20/80, 30/70, 40/60, 50/50, 60/40, 70/30, 80/20, 90/10 & 100/0. By test, analysis and calculation to the targets of breaking strength, moisture regain, fusion enthalpy, crystallization enthalpy, etc. and curve simulation to them with origin7.5, an unique objective function was set in the way of objective optimization. Then lingo9.0 was applied to determine the optimal blending ratio of Outlast fiber/cotton blending yarn and it was concluded that at about 60% of Outlast fiber content, the ratio is the best, i.e. the blending yarn has the best targets in general.

On the ground of its development and thermoregulation theory, thermoregulation property of Outlast fiber was subjected to test and analysis by means of thermal analysis. Specifically over the applied sample of Outlast acrylic fiber, it was concluded by test that the ranges of fusion heat absorption and crystallization heat release were 22.11°C～25.84°C and 27.45°C～20.07°C, peak temperatures of heat absorption and release were 25.84°C and 20.07°C, and enthalpy data of fusion & crystallization were 7.887J/g and 9.667J/g respectively. Outlast fiber, therefore, has been certified its obvious capability of temperature regulation, as a foundation for further study in the future.