Abstract

In the production of functional nonwovens with sustainable fibers, kapok, with unique qualities, becomes an excellent candidate for the production of thermal insulation textiles. However, the development of 100% raw kapok fiber structures is a challenge, since their mechanical resistance and inter-fiber cohesion is very low. In this work, the thermal behavior of new needle punched bi-layered nonwovens produced from 100% raw kapok fibers is studied. These innovative structures were obtained through dry heat-pressing of needle punched nonwovens, developed according to a novel method designed. The results obtained have shown that the heat-pressing conditions (temperature and number of cycles) affected the thermal properties of the nonwovens and the thermal performance profile of an insulating arrangement. The bi-layered nonwoven structures reinforced in one heat-pressing cycle at 100 °C showed the higher thermal resistance and the lower thermal conductivity and heat flux and led to the highest delay (decrement delay) of the heat transfer from the outside to the inside of the insulating assembly and vice-versa, acting as an effective thermal insulator.

摘要

在具有可持续纤维的功能性非织造布的生产中，具有独特品质的木棉成为绝热纺织品生产的极佳候选者。但是，由于其机械强度和纤维间的内聚力非常低，因此开发100％的原始木棉纤维结构是一项挑战。在这项工作中，研究了由100％的原始木棉纤维制成的新型针刺双层无纺布的热性能。这些创新的结构是通过对针刺无纺布进行干式热压而获得的，根据设计的新方法开发而成。所获得的结果表明，热压条件（温度和循环次数）影响非织造布的热性能和绝缘装置的热性能曲线。