Multilayer structure based on polyamides and on a tie layer...

Stock material or miscellaneous articles – Composite – Of polyamide

Reexamination Certificate

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C252S500000, C428S474900, C428S475800, C525S432000

Reexamination Certificate

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07049006

ABSTRACT:
A multilayer structure based on polyamides, comprising:a first layer (1) formed from a polyamide P1or from a blend of a polyamide P1and a polyolefin PO1having a P1polyamide 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 P1and P3to be identical or different, the layers (1), (2), (2a) and (3) being successive and adhering to one another in their respective contact regions.

REFERENCES:
patent: 4487895 (1984-12-01), Feldmann et al.
patent: 4661585 (1987-04-01), Feldmann et al.

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