US 12,442,471 B2
Multilayer tubing for chemical transfer applications
James Ludlow, Medina, OH (US); Morgan D. Heskett, Akron, OH (US); Mark F. Colton, Rootstown, OH (US); and Michael J. Tzivanis, Chicopee, MA (US)
Assigned to SAINT-GOBAIN PERFORMANCE PLASTICS CORPORATION, Malvern, PA (US)
Filed by SAINT-GOBAIN PERFORMANCE PLASTICS CORPORATION, Solon, OH (US)
Filed on Dec. 1, 2021, as Appl. No. 17/457,111.
Claims priority of provisional application 63/119,730, filed on Dec. 1, 2020.
Prior Publication US 2022/0170574 A1, Jun. 2, 2022
Int. Cl. F16L 11/12 (2006.01); B32B 1/08 (2006.01); B32B 27/08 (2006.01); B32B 27/22 (2006.01); B32B 27/30 (2006.01); B32B 27/40 (2006.01); B32B 37/15 (2006.01)
CPC F16L 11/12 (2013.01) [B32B 1/08 (2013.01); B32B 27/08 (2013.01); B32B 27/22 (2013.01); B32B 27/304 (2013.01); B32B 27/40 (2013.01); B32B 37/153 (2013.01); B32B 2307/70 (2013.01); B32B 2597/00 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A multilayer tubing construction, comprising:
an inner layer;
an intermediate layer comprising thermoplastic polyurethane (TPU), an ethylene acrylate copolymer, PVDF, THV, or a PVDF/THV copolymer; and
a third layer formed from a polyvinyl chloride (PVC) material comprising a non-phthalate plasticizer, wherein the non-phthalate plasticizer comprises dioctyl terephthalate (DOTP), wherein thermoplastic polyurethane (TPU), an ethylene acrylate copolymer, PVDF, THV, or a PVDF/THV copolymer of the intermediate layer covers the inner layer around 360° of a circumference of the inner layer.