• fiber
  • heating said deposited slurry to dry said mat, and thereafter heating said dry mat to temperatures about 290 C., to shrink and/or fuse said polytetrafluoroethylene fibrids in said dried mat to form a matrix holding said asbestos fibers in a polytetrafluoroethylene fibrid and asbestos fiber containing diaphragm, said fused deposit containing polytetrafluoroethylene fibrids comprising from about 5 to about 25 percent by weight of said diaphragm. (google.com)
  • heating said deposited slurry to dry said mat, and thereafter heating said dry mat to temperatures above about 290 C., to shrink and/or fuse said polytetrafluoroethylene fibrids in said dried mat to form a matrix holding said asbestos fibers in a polytetrafluoroethylene fibrid and asbestos fiber containing diaphragm. (google.com)