Patent ID: 7695789

Claim:
A fully emptiable tube provided with a wall resistant to stress-cracking and forming a water barrier, said tube comprising a flexible skirt and a head manufactured in a single piece, the flexible skirt being elongate in an axial direction and having, at one end of the tube, a filling end sealed by crushing the flexible skirt along a transverse direction and the head comprising at least one evacuation orifice and a flexible neck forming a radial extension of the at least one evacuation orifice and connecting with the flexible skirt, at least the flexible skirt and flexible neck forming a single-piece assembly, a wall at the joining of the flexible neck with the flexible skirt in a longitudinal plane containing the axial direction and perpendicular to the transverse direction having a determined joining radius, and the flexible skirt in a plane transverse to the axial direction and at mid-distance between an end of the flexible neck forming the at least one evacuation orifice and the filling end of the tube having a determined perimeter and a substantially constant wall thickness, the ratio of the determined perimeter to the joining radius being at least equal to 4.5, wherein the wall in the transverse plane has a median thickness of between 0.30 mm and 1.20 mm, wherein the tube consists of a mixture of a number “n” where n is at least equal to 1 of the polymers belonging to a family of copolymers-olefins prepared from C 2 to C 10 monomers, wherein at least a first polymer of the mixture belongs to the polypropylene family, and wherein the constituent mixture of the tube wall has a flexural modulus of no more than 700 MPa according to standard NF EN ISO 178, and wherein the first polymer is a heterophase copolymer of propylene and ethylene.