Multilayer tubing for chemical transfer applications
AssigneeSaint-Gobain Performance Plastics Corporation
InventorsJames LUDLOW, Morgan D. HESKETT, Mark F. COLTON, Michael J. TZIVANIS
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Abstract
Systems and methods are disclosed that include providing a multilayer tubing construction with an inner layer, an intermediate layer, and an outer or third layer formed from a material comprising a non-phthalate plasticizer, such as TOTM, DOA, DOTP, or combinations thereof. The multilayer tubing may be suitable for carrying a fuel, or other flammable substances therethrough, and resists delamination between layers when exposed to high humidity climates.
Claims20
A multilayer tubing construction, comprising:
- an inner layer;
- an intermediate layer;
- and
- a third layer formed from a material comprising a non-phthalate plasticizer.
The multilayer tubing construction of claim 19, wherein the inner layer comprises a wall thickness of at least 0.003 inches.
A method of forming a multilayer tubing construction, comprising:
- extruding an inner layer of a polyvinylidene difluoride (PVDF) polymer or copolymer;
- coextruding an intermediate layer of a thermoplastic polyurethane (TPU) over the inner layer;
- and
- coextruding an third layer of a polyvinyl chloride (PVC) comprising a non-phthalate plasticizer over the intermediate layer.
Dependencies are inferred from the claim text.