Multilayer structure based on polyamides and on a tie layer made of a copolyamide blend
AssigneeAtofina
InventorChristophe Lacroix
Life of this patent
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Abstract
A multilayer structure based on polyamides, comprising: a first layer (1) formed from a polyamide P1 or from a blend of a polyamide P1 and a polyolefin PO1 having a P1 polyamide matrix, optionally, a layer (2a) formed from EVOH; a layer (2) formed from a blend of PA-6/12 copolyamides, one comprising by weight more 6 than 12 and the other more 12 than 6; a layer (3) formed from a polyamide P3, it being possible for P1 and P3 to be identical or different, the layers (1), (2), (2a) and (3) being successive and adhering to one another in their respective contact regions.
Claims19
A polyamide-based multilayer structure comprising:
- a first layer (1) comprising a polyamide P1 or a blend of a polyamide P1 and a polyolefin PO1 having a P1 polyamide matrix,
- optionally, a layer (2a) comprising EVOH;
- a layer (2) comprising a blend of a first PA-6/12 copolyamide, containing 52 to 90% by weight PA-6 for 48 to 10% by weight PA-12 and a second PA-6/12 copolyamide containing 52 to 90% by weight PA-12 by weight to 48 to 10% by weight PA-6;
- a layer (3) comprising from a polyamide P3,
- P1 and P3 being identical or different, layers (1), (2), (2a) and (3) being successive and adhering to one another in their respective contact regions.
A polyamide blend comprising a compatibilizer which is a blend of a first PA-6/12 copolyamide, having 52 to 90% by weight PA-6 for 48 to 10% by weight PA-12 and a second copolyamide having 52 to 90% by weight PA-12 to 48 to 10% by weight PA-6.
Dependencies are inferred from the claim text.