Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Reexamination Certificate
2006-06-20
2006-06-20
Miggins, Michael (Department: 1772)
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
C428S036700, C428S474900, C428S476900
Reexamination Certificate
active
07063873
ABSTRACT:
A multiplayer tube comprising: an outer layer formed from a polyamide, a layer formed from a copolyamide, a layer formed from an EVOH, a layer formed from a copolyamide, and an inner layer formed from a polyamide, the layers being successive and adhering to one another in their respective contact region. Advantageously, the inner layer is formed by a compound based on a polyamide and electrically conducting carbon black, producing a surface resistivity of less than 106Ω. The tubes have a very low permeability to petrol, particularly to hydrocarbons and their additives, and in particular to alcohols, such as methanol and ethanol, or to ethers, such as MTBE or ETBE. These tubes also have good resistance to engine lubricating oils as well as fuels.
REFERENCES:
patent: 4816304 (1989-03-01), Nohara et al.
patent: 6302153 (2001-10-01), Merziger
patent: 6555243 (2003-04-01), Flepp et al.
patent: 0517453 (1992-12-01), None
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patent: 2765520 (1999-01-01), None
patent: 96/13680 (1996-05-01), None
Bellet Gaëlle
Bonnet Anthony
Merziger Joachim
Arkema
Miggins Michael
Millen White Zelano & Branigan P.C.
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