Five one-quart glass jars were wrapped with insulating fabrics; wool knit, cotton fleece cotton knit, Polartec200, and Thinsulate. A sixth jar was not insulated to serve as a control. One quart of 120°F water was poured into six glass jars. Metal, threaded lids with laboratory thermometers inserted were screwed on jars. Thermometers were positioned about 2" above base of jars. Jars placed on insulating pad in the refrigerator. Immediately recorded water temperature readings of each treatment & refrigerator air temperature. Continued readings every 15 minutes for two hours. Experiment replicated five times.
Thinsulate was consistently the best insulator of the five sportswear materials tested. Two of the natural fabrics, cotton fleece and wool, performed about the same, but with lower values than Thinsulate. Cotton knit and Polartec performed similarly, but with lower values than cotton fleece and wool. I was surprised by the poor performance of the other synthetic fabric, Polartec, as it scored the lowest ranking of the five fabrics I tested.
Based on my experiment, it seams to me that not all synthetic fabrics are created equal when it comes to living up to their manufacturer's claims of superior performance. In cold weather, I will wear a Thinsulate jacket. If it is just a little bit cold, I will put on my sweatshirt or wool sweater.
This project evaluated five common synthetic and natural sportswear fabrics for their insulating abilities in cold conditions
Science Fair Project done By Andrew L. Zellman