Fuel tank or tubing for filling this tank
AssigneeSolvay (Societe Anonyme)
InventorsJules-Joseph Van Schaftingen, Serge Dupont
Life of this patent
Estimating the term…
Abstract
The invention relates to a multilayer tank or tubing made of a thermoplastic, comprising at least one layer comprising a barrier resin, adjacent to at least one layer consisting of a blend comprising at least one polyolefin and at least one functionalized polyolefin, and the said functionalized polyolefin of which comprises functional monomeric units chosen from carboxylic acids, dicarboxylic acids and the anhydrides corresponding to the said dicarboxylic acids.
Claims25
Multilayer fuel tank or tubing for filling said tank, made of a thermoplastic, comprising a hollow body, produced by coextrusion-blow moulding and consisting of four layers, which are defined as a), b), c), and d) from the inside to the outside:
- a) one layer is a blend comprising at least one polyolefin and at least one functionalized polyolefin, wherein the said functionalized polyolefin comprises functional monomeric units selected from the group consisting of carboxylic acids, dicarboxylic acids and the anhydrides thereof, and
- b) a barrier layer, made of a polyamide, a random ethylene-vinyl alcohol copolymer or a blend of a polyamide and a random ethylene-vinyl alcohol copolymer, wherein layer a) is bonded directly to said barrier layer;
- c) a third layer is a second blend comprising at least the functionalized polyolefin and a recycled polyolefin which comes from the grinding of scrap obtained at various steps in the manufacture of the multilayer fuel tank or tubing;
- and
- d) a fourth layer comprising a virgin polyolefin.
Multilayer fuel tank, made of a thermoplastic, comprising a hollow body, produced by coextrusion-blow moulding and consisting of four layers, which are defined as a), b), c), and d) from the inside to the outside:
- a) one layer is a blend comprising at least one polyolefin and at least one functionalized polyolefin, wherein the said functionalized polyolefin comprises functional monomeric units selected from the group consisting of carboxylic acids, dicarboxylic acids and the anhydrides thereof, and
- b) a barrier layer, made of a polyamide, a random ethylene-vinyl alcohol copolymer or a blend of a polyamide and a random ethylene-vinyl alcohol copolymer, wherein layer a) is bonded directly to said barrier layer;
- c) a third layer is a second blend comprising at least the functionalized polyolefin and a recycled polyolefin which comes from the grinding of scrap obtained at various steps in the manufacture of the multilayer fuel tank;
- and
- d) a fourth layer comprising a virgin polyolefin.
Multilayer tubing for filling a fuel tank, made of a thermoplastic, comprising a hollow body, produced by coextrusion-blow moulding and consisting of four layers, which are defined as a), b), c), and d) from the inside to the outside:
- a) one layer is a blend comprising at least one polyolefin and at least one functionalized polyolefin, wherein the said functionalized polyolefin comprises functional monomeric units selected from the group consisting of carboxylic acids, dicarboxylic acids and the anhydrides thereof, and
- b) a barrier layer, made of a polyamide, a random ethylene-vinyl alcohol copolymer or a blend of a polyamide and a random ethylene-vinyl alcohol copolymer, wherein layer a) is bonded directly to said barrier layer;
- c) a third layer is a second blend comprising at least the functionalized polyolefin and a recycled polyolefin which comes from the grinding of scrap obtained at various steps in the manufacture of the tubing;
- and
- d) a fourth layer comprising a virgin polyolefin.
Dependencies are inferred from the claim text.