Multilayer fuel line
AssigneeEms-Chemie AG
InventorHeinz Caviezel
Life of this patent
Estimating the term…
Abstract
A plastic line including at least an inner layer, which directly or indirectly encloses an interior space, and an outer layer directly adjacent to the inner layer. The inner layer is based on fluoropolymer, and the outer layer consists of the following constituents: (A) 51-98% of a polyamide from the following group: PA 616, PA 516, PA 618 or mixtures thereof, and copolymers containing at least 50% of at least one of these polyamides and also mixtures of at least one of these polyamides with a further different thermoplastic material (A2), wherein the proportion of these polyamides in such mixtures makes up at least 50%; (B) 2-20% of impact modifiers or plasticizers; (C) 0-29% of additives different from (A) and (B), wherein the components (A)-(C) together make up 100% of the material of the outer layer.
Claims29
A plastics line comprising at least two layers, an internal layer which directly or indirectly encloses an internal space of the line, and an external layer which directly adjoins the internal layer,
- wherein the structure of the internal layer is based on fluoropolymer,
- and
- wherein the external layer consists of the following constituents:
- (A) 84-88 percent by weight of PA 616, copolymers comprising at least 50 percent by weight of this polyamide, or mixtures of PA 616 with a further thermoplastic (A2) differing therefrom, wherein the proportion of PA 616 in such mixtures is at least 50 percent by weight;
- (B) 2-15 percent by weight of at least one selected from the group consisting of impact modifier and plasticizer;
- and
- (C) 0-3 percent by weight of additives differing from (A) and (B), wherein the proportions by weight of the components (A)-(C) give a total of 100 percent by weight of the material of the external layer.
Dependencies are inferred from the claim text.