| 摘要 |
<p>The object of this invention is to provide a cooling or warming sheet which is a sheet-like structure comprising an aqueous gel layer and covering layers that surround the gel layer, wherein the sheet can be used two or more times and shows a low-resilient property depending on physical properties of the aqueous gel layer. A cooling or warming sheet is used, that comprises a fibrous layer a , an air-impermeable sheet layer a , an aqueous gel layer, and an air-impermeable sheet layer b in this order, wherein the aqueous gel layer is unexposed, and characterized in that the aqueous gel layer has a jelly strength of 200 to 3,000g when the jelly strength is determined under the following conditions:
(Conditions for determining jelly strength)
Measuring apparatus: Compression-type analyzer for determining physical properties
Atmospheric conditions for determination: 20 degrees celsius, 65%RH
Shape to be compressed and area: Circle having a diameter of 30mm, 7.065cm 2
Quantity to be compressed (Amount of displacement): 2mm
Compression rate: 1mm/second
Size of test sample: 20cm x 30cm x 6mm (thickness).</p> |
