THE INVENTION RELATES TO A METHOD FOR MANUFACTURING A LAMINATED STRUCTURE (22) FOR USE IN AN ABSORBENT ARTICLE SUCH AS A DIAPER, A SANITARY NAPKIN, A PANTY LINER, AN INCONTINENCE PAD OR SIMILAR AND BEING DEFINED BY A PLURALITY OF MATERIAL LAYERS (6, 7, 8) COMPRISING AT LEAST A FIRST LAYER (6) WHICH IS LIQUID- PERMEABLE, A SECOND LAYER (7) CONSTITUTING AN ABSORBENT CORE (7) AND A THIRD LAYER (8), EACH OF SAID LAYERS (6, 7, 8) BEING FORMED OF A MATERIAL HAVING A CERTAIN PORE RADIUS (RI, R2, R3), SAID METHOD COMPRISING: BONDING TOGETHER SAID MATERIAL LAYERS (6, 7, 8) BY MEANS OF AT LEAST TWO ULTRASONIC WELDING STEPS (4 12) AND PROVIDING AN ULTRASONIC WELDING PATTERN (15 17) FOR EACH OF SAID WELDING STEPS, EACH OF SAID WELDING PATTERNS (15 17) BEING DEFINED BY A PLURALITY OF BONDING SITES (16 18). THE METHOD ACCORDING TO THE INVENTION COMPRISES PROVIDING SAID WELDING STEPS (4 11) FOR FORMING GENERALLY THE ENTIRE ABSORBENT ARTICLE AND SELECTING SAID WELDING PATTERNS (15 17) IN A MANNER SO THAT AT LEAST THE ENTIRE LAMINATED STRUCTURE (22) HAS A MULTIPLE PORE RADIUS.
