[Objective]

Thermographical examination was carried out to observe the basic properties of fabric treated with Prethermo C-25.

[Test method]

Fabric treated with Prethermo C-25 (20% of the fabric weight) was placed on a heat-insulating material (styrofoam), as shown in Picture 1, on which a stainless beaker containing water, approx. 40°C, was placed (Picture 2). The beaker was removed after about 1 minute, changes in temperatures on the fabric surface were observed using Neo Thermo TVS-700 (Nippon Avionics Co., Ltd.)(Picture 4). This test was carried out at a room temperature of 20°C.

Picture 1	Picture 2	Picture 3

Picture 4	Picture 5

[Results]

Thermographs taken in this test are shown blow. Graph 1 shows changes in the average surface temperature of fabric treated with Prethermo C-25 and untreated fabric. The average surface temperature here refers to the average temperatures of the surface of the semi-circular areas shown in Picture 5. The average surface temperature was plotted every 10 seconds, starting right after the removal of the stainless beaker. After the removal of the beaker, both temperatures on the treated and the untreated fabric dropped slowly, and it was determined that the speed at which temperature falls towards the ambient temperature was slower in Prethermo-treated fabric because of latent heat around the solidification point of 25°C.

Thermographs
The right half:	untreated
The left half:	treated with Prethermo C-25

Before test	Placing a stainless beaker	Right after the removal of the beaker
After 120 sec	After 180 sec	After 300 sec

Graph 1 Temperature changes on treated fabric