Filtration structure, in particular a particulate filter for the exhaust gases of an internal combustion engine, and associated exhaust line

Filtration structure (11), in particular a particulate filter for the exhaust gases of an internal combustion engine, of the type comprising:

• at least first and second filtration elements (15A, 15B), each filtration element (15A, 15B) having a gas inlet face (21) and a gas discharge face (23) which are connected to each other by at least two lateral faces (24), the first and the second filtration elements (15A, 15B) respectively having a first and a second lateral face (24A, 24B) which are arranged facing each other;
• and
• a joint (17) for connecting the faces (24A, 24B), extending between the faces (24A, 24B);
• the first lateral face (24A) comprising, in the upstream half (36A) thereof, a first region (35C) of weak or zero adhesion to the joint (17), delimited longitudinally in an upstream direction by an upstream region (33A) of strong adhesion to the joint (17);
• each region (35) of weak or zero adhesion to the joint (17) of the first face (24A) being located substantially facing a region (33) of strong adhesion to the joint (17) of the second face (24B), and each region (33) of strong adhesion to the joint (17) of the first face (24A) being located substantially facing a region (35) of weak or zero adhesion to the joint (17) of the second face (24B);
• characterised in that the upstream region (33A) of strong adhesion is delimited longitudinally in an upstream direction by a second region (35A) of weak or zero adhesion to the joint (17).