First U.S. Commercial Sulfar Fiber Production: 1983, Phillips Fibers Corporation, A Subsidiary of Phillips 66 Company

Current U.S. Sulfar Fiber Producers: Fiber Innovation Technology (FIT)

Federal Trade Commission Definition for Sulfar Fiber: A manufactured fiber in which the fiber forming substance is a long synthetic polysulfide in which at least 85% of the sulfide (-Sn-) linkages are attached directly to two (2) aromatic rings. (Complete FTC Fiber Rules here.)

Basic Principles ofSulfar Fiber Production — The PPS (polyphenylene sulfide) polymer is formed by reaction of sulfur with dichlorobenzene and then extruded by melt spinning to produce both staple and filament fibers.

Sulfar Fiber Characteristics

  • Sulfar is a specialty fiber characterized by remarkable resistance to thermal and chemical attack
  • Outstanding resistance to heat
  • Outstanding resistance to acids and alkalies
  • Excellent resistance to mildew, aging, sunlight and abrasion
  • Nondyeable
  • Resistant to bleaches and solvents under normal conditions

Major Industrial Sulfar Fiber Uses — Filter fabric for coal-fired boiler bag houses; papermakers’ felts; electrical insulation, electrolysis membranes, filter fabrics for liquid and gas filtration; high-performance composites, gaskets and packings.