This study surveys the physical properties of coolness materials. The basic mechanical properties of coolness specimens and the moisture responded transformable coolness covering specimens such as tenacity, breaking strain and initial modulus were mea...
This study surveys the physical properties of coolness materials. The basic mechanical properties of coolness specimens and the moisture responded transformable coolness covering specimens such as tenacity, breaking strain and initial modulus were measured and their dry and wet thermal shrinkages were also measured and discussed. In addition, Qmax was measured by KES-F7. And the mechanical properties of knitted fabrics were assessed using FAST system. Also, the dyeing properties of coolness materials were invested by Computer Color Matching. The results were as follows.
•Coolness specimens
-. The initial modulus of coolness hydrophilic PET SDY was higher than that of hydrophilic PET DTY and lower than that of regular PET DTY.
-. The bending rigidity of knitted fabrics by coolness hydrophilic PET SDY was much higher than those of knitted fabrics by hydrophobic and regular PET DTY.
-. The shear modulus of knitted fabrics by coolness hydrophilic PET SDY was higher than those of knitted fabrics by hydrophobic and regular PET DTY.
-. The compressibility and extensibility a little stiff hand of coolness hydrophilic PET SDY were much lower than those of knitted fabrics by hydrophobic and regular PET DTY.
-. The Qmax of coolness hydrophilic PET SDY treated with dyeing temp 110℃ and time 30min was higher than those treated with other condition and good coolness was not shown comparing to other comparison material.
※ Hydrophilic PET SDY showed good physical properties and revealed good dimensional stability from mechanical properties such as high shear rigidity , low compressibility and high bending rigidity of knitted fabrics by hydrophilic PET SDY .
•MRT coolness covering specimens
-. The K/S values of HEF-PET was higher than that of HEF-Aerocool and Spandex.
-. The bending rigidity, compressibility and shear modulus of knitted fabrics by HEF was lower than those of knitted fabrics by Spandex.
-. The extensibility of knitted fabrics by HEF was higher than those of knitted fabrics by Spandex.
-. The absorption of knitted fabrics by HEF was much higher than those of knitted fabrics by Spandex.
※ HEF-PET showed good thermal characteristic and revealed good hand from mechanical properties such as high extensibility and low bending rigidity of knitted fabrics by HEF-PET yarns.