Pipe liners, pipe liner coatings, and associated methods

A pipe liner, comprising:

• a fabric sheet comprising two longitudinal edges joined together to form a longitudinally extending tube;
• and
• a coating disposed on the fabric sheet, the coating comprising:
• about 60 percent by weight to about 80 percent by weight of a thermoplastic;
• and
• about 3 percent by weight to about 15 percent by weight of a tie resin.

A piper liner, comprising:

• a substrate comprising two longitudinal edges joined together to form a longitudinally extending tube;
• and
• a multilayer coating disposed on the substrate, the multilayer coating comprising:
• a 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;
• and
• a second layer disposed adjacent to the first layer, the second layer comprising polyamide;
• and
• a third layer disposed adjacent to the second layer, the third layer comprising a second thermoplastic and a second tie resin.

A method for making a pipe liner, comprising:

• providing a fabric sheet;
• depositing a multi-layer coating on the fabric sheet by:
• depositing a first layer 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;
• depositing a second layer on the first layer, the second layer comprising polyamide;
• and
• depositing a third layer disposed on the second layer, the third layer comprising a second thermoplastic and a second tie resin;
• aligning two longitudinal edges of the fabric sheet and multi-layer coating such that the two longitudinal edges are adjacent to one another;
• and
• creating a seam between the two longitudinal edges.