B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/34 (2006.01) B32B 1/08 (2006.01) B32B 27/06 (2006.01) B32B 33/00 (2006.01) B60K 15/01 (2006.01)
Patent
CA 2544505
The present invention relates to a multilayer tube comprising, in its radial direction from the outside inwards: an optional layer (1) made of nylon-11 or nylon-12 polyamide; an intermediate layer (2) comprising by weight, the total being 100%: - 50 to 100% of at least one polyamide Al of formula X,Y/Z or 6,Y2/Z, in which X denotes residues of an aliphatic diamine having from 6 to 10 carbon atoms, Y denotes residues of an aliphatic dicarboxylic acid having from 10 to 14 carbon atoms, Y2 denotes residues of an aliphatic dicarboxylic acid having from 15 to 20 carbon atoms, 2 denotes at least one unit chosen from residues of a lactam, residues of an .alpha.,.OMEGA.-aminocarboxylic acid, the unit X1,Y1, in which X1 denotes residues of a diamine and Y1 denotes residues of a diacid, the weight ratios Z/(X+Y+2) and Z/(6+Y2+2) being between 0 and 15%, and - 0 to 500 of nylon-11 or nylon-12 polyamide; an optional layer (3) made of nylon-11 or nylon-12 polyamide, with the condition that at least one of the layers (1) and (3) is present; the layers being successive and adhering to one another, the inner layer being the layer in contact with the fluid transported. According to one embodiment of the invention, the inner layer contains an electrically conductive material. The invention also relates to the use of these tubes for transporting fuel.
Amouroux Nicolas
Steng Michaela
Arkema
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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