再生涤纶超短纤维的保温性能研究

系统研究了不同形貌结构的再生涤纶的保温效率。研究表明:线密度为0.8 dtex的再生涤纶的直径为12~14μm,线密度为1 dtex的再生涤纶中空纤维的直径为13~20μm,中空再生涤纶的直径分布较宽,而非中空纤维的纤维直径分布更窄;在相同线密度下,开松后纤维的保温率比未开松纤维的高;在切断长度相同的情况下,线密度越高,相同填充量下纤维的保温性能越差;保温填充材料越少,填充切断长度越短的纤维,越有利于保温性能的提升,而纤维长度越长,填充材料越多的保温效率也更高;在相同填充量情况下,中空纤维比非中空纤维具有更高的保温率;此外,开松后的纤维具有更优良的保温效果,且保温材料填充量达到80 g左右时,充填量基本达到饱和,继续添加试样,会造成纤维之间互相挤压,反而对保温效果不利。

Study on the Thermal Insulation Properties of Recycled Polyester Staple Fiber

In this paper, the thermal insulation efficiency of recycled polyester staple fiber with different morphologies was studied. When the density was 0.8 dtex, recycled polyester staple fiber diameter ranged from 12 to 14 μm. When the density was 1 dtex, hollow recycled polyester staple fiber diameter ranged from 13 to 20 μm. SEM results indicated that the diameter distribution of PET hollow recycled polyester staple fibers were wider, and the narrower diameter distribution of solid fiber fibers were detected. At the same den-sity, the releasing fiber had the higher warmth retention rate than the non releasing fiber, and the higher the density, the worse the insulation performance under the same cutting length. The shorter the fiber and the less quantity filling material could improve the insulation performance. When the length of fiber was longer,the more quantity filling material had better heat preservation efficiency, and the hollow fiber had higher insulation efficiency than solid fiber under the same weight. In addition, the release fiber had better insulation effects. Furthermore, when the weight of the insulation material reached 80 g, the amount of filling reached saturation. Much more fiber was loaded into test bag, which would cause the fibers to squeeze each other and caused the insulation decrease.