FIELD: process engineering.
SUBSTANCE: claimed invention relates to multiply container and to its production with the help of appropriate mould. Proposed container comprises multiply structure composed by three or more plies including gastight ply arranged between inner and outer plies. Note here that gastight ply in the multiply structure area features concaved section in its cross-section at cutting said multiply container to thin plates. Note here that concaved section features the depth making 0.01-0.9 of the gastight ply maximum tight.
EFFECT: higher gas tightness and resistance to delamination.
13 cl, 8 dwg, 4 ex, 3 tbl
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