Measures against heat are required in various situations of daily life. One of the things that textile-fashion industries are working on to make a comfortable life for people is, the “Heat-ray shielding performance”. Traditionally, sports clothing and interior products such as curtains have been the mainstream; however, in recent years, it has also been applied to general clothing.

“Heat ray shielding performance” is a function to suppress temperature rise by blocking solar radiation by special structural fibers such as a core sheath, or the shape, texture, and post-finishes. JIS L 1951 test method regulate the evaluation of this performance.

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