At Filtration 2009, DuPont Protection Technologies introduced DuPont Nomex KD, a new technology that combines Nomex and Kevlar fibers in a unique nonwoven filter material that improves upon the capabilities of existing filter materials. Designers of industrial air filters used in high-temperature applications such as asphalt production and cement clinker coolers will be able to use Nomex KD to create more efficient, more effective and potentially less costly filtration solutions.
“DuPont has been supplying Nomex fiber for use in hot-gas air filtration for many years,” said Kathy Kowalski, global marketing manager for Performance Materials—DuPont Protection Technologies. “With this new technology we have combined Nomex, known for its ability to withstand extreme temperatures, with Kevlar, an exceptionally strong fiber used for ballistic protection. The resulting fabric delivers up to 60% better filtration performance than standard Nomex.”
DuPont Nomex KD is produced in a nonwoven process forming fibrillated microfibers that increase the filtration surface area. The larger surface area leads to greater filtration efficiency and less dust leakage. High dimensional stability could improve durability and extend bag life, and in applications requiring spark resistance, the stability of Nomex KD in heat and flame conditions helps maintain bag integrity.