Multilayer flexible tube and methods for making same
AssigneeSaint-Gobain Performance Plastics Corporation
InventorsJames LUDLOW, Morgan D. HESKETT, Kevin M. MCCAULEY, Michael J. TZIVANIS
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Abstract
A multilayer flexible tube includes an inner layer including a melt processable fluoropolymer, wherein the melt processable fluoropolymer includes a terpolymer including a tetrafluoroethylene, a hexafluoropropylene, and a vinylidene fluoride (THV); a tie layer including a polymeric blend of a terpolymer including a tetrafluoroethylene, a hexafluoropropylene, and a vinylidene fluoride (THV) with a poly vinylidene fluoride (PVDF), a polyamide, a polyetheramide block copolymer, or combination thereof; and an outer layer including a melt processable polymer having a shore hardness less than a shore hardness of the inner layer.
Claims20
A multilayer flexible tube comprising:
- an inner layer comprising a melt proces sable fluoropolymer, wherein the melt proces sable fluoropolymer comprises a terpolymer comprising a tetrafluoroethylene, a hexafluoropropylene, and a vinylidene fluoride (THV);
- a tie layer comprising a polymeric blend of a terpolymer comprising a tetrafluoroethylene, a hexafluoropropylene, and a vinylidene fluoride (THV) with a poly vinylidene fluoride (PVDF), a polyamide, a polyetheramide block copolymer, or combination thereof;
- and
- an outer layer comprising a melt processable polymer having a shore hardness less than a shore hardness of the inner layer.
A method of making a multilayer flexible tube comprising:
- providing an inner layer comprising a melt processable fluoropolymer, wherein the melt proces sable fluoropolymer comprises a terpolymer comprising a tetrafluoroethylene, a hexafluoropropylene, and a vinylidene fluoride (THV);
- providing a tie layer comprising a polymeric blend of a terpolymer comprising a tetrafluoroethylene, a hexafluoropropylene, and a vinylidene fluoride (THV) with a poly vinylidene fluoride (PVDF), a polyamide, a polyetheramide block copolymer, or combination thereof;
- and
- providing an outer layer comprising a melt processable polymer having a shore hardness less than a shore hardness of the inner layer.
A multilayer flexible tube comprising:
- an inner layer comprising a melt proces sable fluoropolymer, wherein the melt proces sable fluoropolymer comprises a terpolymer comprising a tetrafluoroethylene, a hexafluoropropylene, and a vinylidene fluoride (THV);
- a tie layer directly in contact with the inner layer, wherein the tie layer comprises a polymeric blend of a terpolymer comprising a tetrafluoroethylene, a hexafluoropropylene, and a vinylidenefluoride (THV) with a poly vinylidene fluoride (PVDF);
- and
- an outer layer directly in contact with the tie layer, wherein the outer layer comprises a melt processable polymer having a shore hardness less than a shore hardness of the inner layer.
Dependencies are inferred from the claim text.