Method for the production of an elastic laminate and laminated elastic product

A method for production of an elastic laminate, the method comprising the following steps in a same production line:

• coextruding a first web of elastic film to form a coextruded first web of elastic film, said coextruded first web of elastic film comprising at least three layers, said at least three layers comprising at least two different polymer materials;
• contemporaneously feeding said coextruded first web of elastic film and two second nonwoven webs to a thermal binding calender, wherein said coextruded first web of elastic film is arranged between said two second nonwoven webs when entering said thermal binding calender, wherein said first web of elastic film, during movement from a coextrusion step to a thermal binding step, passes from a melted state, in said coextrusion step, to a solidified and cold state when entering said thermal binding calender, wherein said coextruded first web of elastic film has a temperature, when entering said thermal binding calender, equal to, or lower than, one-seventh of said temperature of said first web of elastic film at an end of said coextrusion step;
• joining, through spot welding or area welding in said thermal binding calender, said second nonwoven webs with respective opposite outer layers of said coextruded first web of elastic film to produce an intermediate web;
• and
• stretching said intermediate web according to a direction transverse to said intermediate web, wherein said intermediate web is cooled to a temperature between 15° C. and 40° C. after the thermal binding step and before the stretching of said intermediate web,
• wherein a thickness of a laminated web exiting said production line has an increased thickness with respect to a sum of said second nonwoven webs and said coextruded first web of elastic film entering said thermal binding calender,
• wherein said increased thickness is between 50% and 66% of said sum of said second nonwoven webs and said coextruded first web of elastic film before entering said thermal binding calender.