Cosmetic product packaging assembly comprising a container made of cellulose material and a closure element

A cosmetic product packaging assembly (1) comprising:

• a container (2) extending along a longitudinal axis (X) between a bottom (20) and a neck (21), a peripheral wall (22) connecting said bottom to said neck, said neck (21) defining an opening (O) and having a radially inner surface (23) and a radially outer surface (24) that are connected by a frontal surface (25) extending in the radial direction, said outer surface (24) being provided with an axial joining portion (26), and said inner surface (23) and said outer surface (24) each having a smooth axial portion (27, 28) connected to the frontal surface (25);
• a closure element (3) comprising a plate (30) intended to extend orthogonal to the longitudinal axis (X) when the closure element (3) closes the container (2) and having an upper surface (31) and a lower surface (32), and a fastening skirt (33) extending perpendicularly from the lower surface (32) of the plate (30) to a frontal surface (36), said fastening skirt (33) comprising a radially inner surface (34) and a radially outer surface (35) that are connected by the frontal surface (36), said inner surface (34) being provided with an axial joining portion (37) designed to cooperate with the axial joining portion (26) of the outer surface (24) of the neck (21) of the container (2);
• wherein at least the neck (21) of the container (2), and preferably the majority or even all of the container (2), comprises a cellulose material;
• wherein the lower surface (32) of the closure element (3) is provided with a sealing element (4) comprising a base (40) having an upper surface (41) and a lower surface a radially inner sealing skirt (43) and a radially outer sealing skirt said base (40) and said sealing skirts (43, 44) defining a groove (45),
• and wherein, when the closure element (3) closes the container (2), the smooth axial portions (27, 28) and the frontal surface (25) of the neck (21) of the container (2) are at least partially received in the groove (45) of the sealing element (4) and define therewith a radially inner interference region (ZII), a radially outer interference region (ZIE) and a frontal interference region (ZIF), said inner interference region (ZII) and outer interference region (ZIE) having an at least partial overlap (c) in projection on the longitudinal axis (X).