MULTILAYER BOTTLE Russian patent published in 2011 - IPC B32B27/36 B65D1/00 B65D1/14 B65D1/28 B32B27/34 B65D1/02 

FIELD: process engineering.

SUBSTANCE: invention relates to multilayer bottle that comprises cylindrical part including outer layer, inner layer and, at least, one barrier layer arranged there between. Outer and inner layers comprise 90 wt % of polyether thermoplastic material. Barrier layer comprises 70 wt %, or more, of polyamide. Multilayer bottle meets the requirements of formulae 1 - 3: (1) OTR ≤ 0.2 cm³·mm/(m²·day-atm), where OTR is mean rate of barrier layer oxygen transfer to cylindrical part measured at 23°C and relative humidity of 60%; (2) 20 ≤ (mean degree of cylindrical part barrier layer orientation) ≤ 45, where orientation degree has magnitude determined from refractivity index of barrier layer measured at 23°C by refractometre Abbe according to the formula: Orientation degree = [{n(x) + n(y)}/2 - n(z)] · 1000, where n(x) is refractivity index of barrier layer in direction of bottle layer; n(y) is refractivity index of barrier layer in direction of bottle circumference; and n(z) is refractivity index of barrier layer in direction of bottle thickness; and (3) 0 ≤ b/a · 100 ≤ 200, where "a" is mean thickness (in micrometres) of cylindrical part barrier layer; and "b" is mean thickness (in micrometres) of bottle bottom part barrier layer.

EFFECT: no delamination at whatever effects.

5 cl, 8 ex, 4 tbl, 5 dwg