Preparation and Properties of Reflective Heating Polyethylene Terephthalate Fiber

Reflective heating polyester fiber is the fiber prepared by adding nanoparticle with reflecting infrared radiation into the polyester. The human body loses 60% of the total heat by heat radiation, but reflective heating fiber can reflect the body's infrared radiation back to the human body to minimize the loss of heat. In this paper, the purchased GTO powder is modified by silane coupling agent KH560, which is added into PET as a reflective heating powder, and PET fiber containing different content of GTO(0.3wt%,0.6wt%,0.9wt%) is prepared through adding masterbatch method. The particle size test shows that the average size of GTO powder modified by KH560 is about 180nm and the distribution is narrow, which meets the basic requirements of spinning. Through the SEM analysis of PET fibers cross-section, it is found that the GTO powder modified by KH560 were dispersed well in the PET substrate. The results of DSC and mechanical tests show that the fiber with 0.6wt% content of GTO powder have the improved elongation and the crystallinity degree. For the infrared thermal imaging and UV-VIS-NIR tests of the fabric, with the increase of the proportion of powder the infrared emissivity and reflectivity of the fabric increased, the warmth retention is also improved.