US 12,467,573 B1
Pipe liners, pipe liner coatings, and associated methods
Mark Lee Chandler, Stoneville, NC (US); and Matthew Timberlake, Harrisburg, NC (US)
Assigned to United Felts, Inc., Martinsville, VA (US)
Filed by United Felts, Inc., Martinsville, VA (US)
Filed on Nov. 22, 2024, as Appl. No. 18/956,964.
Claims priority of provisional application 63/665,112, filed on Jun. 27, 2024.
Int. Cl. F16L 55/165 (2006.01); D06N 3/04 (2006.01); D06N 3/12 (2006.01); D06N 3/18 (2006.01)
CPC F16L 55/1656 (2013.01) [D06N 3/045 (2013.01); D06N 3/123 (2013.01); D06N 3/125 (2013.01); D06N 3/183 (2013.01); D06N 2211/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A pipe liner comprising:
a fabric sheet comprising two longitudinal edges joined together to form a longitudinally extending tube,
a multilayer coating disposed on the fabric sheet, the multilayer coating comprising:
a first layer disposed on the fabric sheet, the first layer comprising about 60 percent by weight to about 80 percent by weight of a first thermoplastic and about 3 percent by weight to about 15 percent by weight of a first tie resin;
a second layer disposed on the first layer, the second layer comprising polyamide; and
a third layer disposed on the second layer, the third layer comprising a second thermoplastic and a second tie resin.