Seam-sealed filters and methods of making thereof

摘要

A seam-sealed filter in which the seam is sealed with a seam tape comprised of an expanded fluoropolymer, such as ePTFE and copolymers thereof, having a crosswise matrix modulus of greater than 1,950 psi and an enthalpy ratio of less than 0.6 is disclosed. Such seam-sealed filters are capable of undergoing greater than 50,000 pulse-jet or reverse air cleaning cycles without substantial cracking or peeling of the sealed seam. Accordingly, the seam-sealed filters in the form of bags are particularly suitable for use in reducing particulate emissions in cement baghouses and the like.

主权项

1. A seam tape comprising:
a layer of an expanded fluoropolymer and an adhering material to adhere to and seal a seam, wherein the expanded fluoropolymer of the seam tape has a crosswise direction matrix modulus of greater than about 1,950 psi at room temperature, is amorphously locked, and has an enthalpy ratio of less than 0.6.