Multilayer plastic pipe
AssigneeHuels Aktiengesellschaft
InventorsStefan Rober, Hans Jadamus, Michael Boer, Roland Feinauer, Hans-Dieter Herrmann, Hans Ries
Life of this patent
Estimating the term…
Abstract
A plastic pipe having improved resistance, inter alia, to methanol-containing fuels and improved mechanical properties, comprising at least: (I) an outer layer, (III) an inner layer comprising a moulding composition based on polyvinylidene fluoride, and (II) an intermediate layer disposed between said inner layer (I) and said outer layer (III) comprising a moulding composition based on a mixture of (a) polyamide, and (b) polyglutarimide, wherein the adjacent layers (I) to (III) are each adhesively bonded to one another.
Claims20
A multilayer plastic pipe comprising at least:
- (I) an outer layer,
- (III) an inner layer comprising a moulding composition based on polyvinylidene fluoride, and
- (II) an intermediate layer disposed between said inner layer (III) and said outer layer (I) comprising a moulding composition based on a mixture of
- (a) polyamide, and
- (b) polyglutarimide,
- wherein the adjacent layers (I) to (III) are each adhesively bonded to one another.
A method for transporting (petro)chemical substances comprising flowing said substances through a multilayer plastic pipe comprising:
- (I) an outer layer,
- (III) an inner layer comprising a moulding composition based on polyvinylidene fluoride, and
- (II) an intermediate layer disposed between said inner layer (III) and said outer layer (I) comprising a moulding composition based on a mixture of
- (a) polyamide, and
- (b) polyglutarimide,
- wherein the adjacent layers (I) to (III) are each adhesively bonded to one another.
A method for carrying brake, cooling and hydraulic fluids or fuel in a motor vehicle comprising flowing said fluid or fuel through a multilayer plastic pipe comprising:
- (I) an outer layer,
- (III) an inner layer comprising a moulding composition based on polyvinylidene fluoride, and
- (II) an intermediate layer disposed between said inner layer (III) and said outer layer (I) comprising a moulding composition based on a mixture of
- (a) polyamide, and
- (b) polyglutarimide,
- wherein the adjacent layers (I) to (III) are each adhesively bonded to one another.
A hollow body comprising a multilayer plastic pipe comprising:
- (I) an outer layer,
- (III) an inner layer comprising a moulding composition based on polyvinylidene fluoride, and
- (II) an intermediate layer disposed between said inner layer (III) and said outer layer (I) comprising a moulding composition based on a mixture of
- (a) polyamide, and
- (b) polyglutarimide,
- wherein the adjacent layers (I) to (III) are each adhesively bonded to one another.
A filling port or tank comprising a multilayer plastic pipe comprising:
- (I) an outer layer,
- (III) an inner layer comprising a moulding composition based on polyvinylidene fluoride, and
- (II) an intermediate layer disposed between said inner layer (III) and said outer layer (I) comprising a moulding composition based on a mixture of
- (a) polyamide, and
- (b) polyglutarimide,
- wherein the adjacent layers (I) to (III) are each adhesively bonded to one another.
Dependencies are inferred from the claim text.