Patent ID: 7829165

Claim:
A thermoplastic composite liner for use as an inner wall of a trailer, the thermoplastic composite liner comprising: a) a glass reinforced thermoplastic sheet permanently affixed by a lap seam ultrasonic weld joint to a glass reinforced thermoplastic scuff panel along a length of the scuff panel by ultrasonic welding; b) the scuff panel being positioned relative to the thermoplastic sheet such that an edge portion of a first side of the thermoplastic sheet overlaps and is welded to an edge portion of a first side of the scuff panel along the length of the scuff panel; and c) the ultrasonic welding forming the lap seam weld joint between the overlapping edge portions of the thermoplastic sheet and the scuff panel along the length of the scuff panel, wherein regions of the first side of the scuff panel and the first side of the thermoplastic sheet other than the overlapping edge portions of the first sides of the scuff panel and the thermoplastic liner not being in contact.