(57) The present invention relates to a flexible container for transport and storage of
bulk material and a method for its manufacture. The container shall endure the strains
it is exposed to during a drop test in the bursting zone having a radial bursting
effect. The container (1) consists of a hose-formed piece of material which upper
part is joined with its central part (12) by joints (8) which form an angle 0°<x<90°,
preferably 30°<x<60° with the longitudinal direction of the material. The joints (8)
can be in the form of a V or W and the extreme point (B) if preferably above the bursting
zone (9). The container (1) can be made from a flattened hose-formed piece of material
which is cut in two symmetrical parts (1) along a line cut a, a', b', b where the
lines a, a' and b', b form an angle 0°<x<90° with the longitudinal axis of the material
and the line (a'-b') > 0 is vertical in the middle of the piece of material (1) on
both sides of the folded line (1). The upper part of the piece of material (1) is
folded over the line (2) and joined with the part (12) along cut lines for forming
lifting loops (5). The container combines the requirements to high tensile strength
and high resistance to strain in the bursting zone (9).
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