Composite having two or more layers, including an EVOH layer
View Patent ↗A layered composite which includes the following layers (I) and (II), wherein layer (I) includes (a) from 0 to 80 part by weight of at least one particular polyamide; (b) from 0 to 100 parts by weight of at least one polyamine-polyamide copolymer; and (c) from 0 to 80 parts by weight of at least one particular polyamide which is different from (a), wherein various monomer units are present in at least 20 parts by weight of the entirety of (a) and (b) and various other monomer units are present in at least 20 parts by weight of the entirety of (b) and (c); and layer (II) includes at least one ethylene-vinyl alcohol copolymer.
1. A layered composite, comprising the following layers:
(I) a layer I consisting of:
(a) at least one polyamide selected from the group consisting of PA6, PA6/66 and mixtures thereof;
(c) from 30 and up to and including 80 parts by weight of PA612;
wherein, in said layer I, a total of the parts by weight of (a) and (c) is 100;
(II) a layer II comprising a composition comprising at least one ethylene-vinyl alcohol copolymer; and
(III) at least one layer III which comprises a different composition from layer I and comprising at least one member selected from the group consisting of PA11, PA12, PA612, PA1012, PA1212, and combinations thereof;
wherein a layer sequence is III/I/II.
2. The composite as claimed in claim 1 , further comprising at least one layer comprising at least one member selected from the group consisting of PA6, PA66, PA6/66, and combinations thereof.
3. The composite as claimed in claim 1 , wherein the composite comprises two of the I layers.
4. The composite as claimed in claim 1 , further comprising at least one regrind layer.
5. The composite as claimed in claim 1 , comprising at least one additional outer layer comprising at least one member selected from the group consisting of PA11, PA12, PA612, PA1012, PA1212, and combinations thereof next to an additional layer I.
6. The composite as claimed in claim 1 , comprising at least one electrically conductive layer.
7. The composite as claimed in claim 1 , comprising at least one innermost layer and further comprising at least one electrically conductive layer adjacent to the innermost layer.
8. The composite as claimed in claim 1 , wherein the composite is in the form of a tube.
9. The composite as claimed in claim 1 , wherein at least one region of the composite has a corrugated shape.
10. The composite as claimed in claim 1 , wherein the composite is in the form of a hollow article.
11. The composite as claimed in claim 1 , comprising an elastomer layer as an outermost layer.
12. A tubular article selected from the group consisting of fuel pipe, brake-fluid pipe, coolant pipe, hydraulic-fluid pipe, fuel-pump pipe, air-conditioner pipe, and a vapor line, comprising the composite as claimed in claim 1 .
13. An article selected from the group consisting of a container, fuel container, filler pipe, and filler pipe for a tank, comprising the composite as claimed in claim 1 .
14. A film, comprising the composite as claimed in claim 1 .
15. A method for preparing the composite as claimed in claim 1 , comprising:
performing at least one step selected from the group consisting of multicomponent injection molding, coextrusion, and coextrusion blow molding of at least one of the layers I, II, or both.