| abstract |
A continuous process for applying subgaskets to both the flat surfaces of CCM assemblies, comprising the following steps: n na) preparation of a roll (A) formed of a composite ( 20 ) consisting in one central layer ( 1 ), formed of an ionomeric membrane sheet, wherein on each of the two surfaces, electrocatalytic layers ( 2 ) longitudinally distributed at regular intervals are applied, said layers being on each of the two surfaces in symmetric position among each other with respect to the membrane plane; n nb) preparation of two subgasket rolls (B) wherein, on a subgasket sheet ( 21 ), in correspondence to the position of the electrocatalytic layers ( 2 ) in the roll (A), openings ( 3 ) are made; the percent ratio (subgasket opening area ( 3 ))/(electrocatalytic layer area ( 2 )) being between 90% and 99%; n nc) hot lamination of two rolls (B) with the roll (A), carried out by feeding the roll (A) between the two rolls (B), with the two drums ( 8 ) for the lamination; the step being carried out so that the perimeter of the openings ( 3 ) of the two rolls (B) falls inside the area of the electrocatalytic layers ( 2 ), and obtaining of a roll (C), wherein on each of the two surfaces of the sheet formed of a CCM sequence (roll (A)) a subgasket sheet ( 5 ) (roll (B)) is applied. |