Method of producing a fibrous material layer, a fibrous material layer and an absorbent article containing same

A method of producing a fibrous material layer mainly intended for being incorporated in an absorbent article, selected from the group consisting of a diaper, pant diaper, incontinence guard, sanitary napkin, and wound dressing, which comprises:

• opening at least one bundle of continuous fibers, so called tow;
• separating the tow fibers and evening the tow to a layer having the desired fiber distribution;
• and
• bonding the tow layer in a bonding pattern, but where the tow fibers otherwise are substantially unbonded to each other, wherein bonding is performed in two steps:
• a first step wherein bonding takes place by thermobonding, at which a pattern roll is used which provides the desired bonding pattern, said pattern roll being driven at a higher speed than the feeding speed of the tow layer, so as to create a relatively diffuse and strong bonding pattern in the tow layer;
• and
• a second step in which a more distinct second bonding pattern is created.