Abstract: Method of forming a fiber web (210) intended for use in absorbent products, such as sanitary towels, by air-laying fibers. Separate air flows containing fibers are fed to a number n of different mat-forming wheels (160, 170, 180), where n is a whole number which is at least 2. Separate web layers (161, 171, 181) are formed on each mat-forming wheel. The fiber web (210) is formed by virtue of said web layers being combined downstream of the mat-forming wheels to form a common fiber web which is imparted very great manufacturing accuracy by virtue of the manufacturing method. The manufacturing speed and thus the web speed can be very high, and the desired manufacturing accuracy at the web speed concerned is achieved by selecting a sufficiently great number n of mat-forming wheels. The invention also relates to a fiber web manufactured according to the method.

Abstract: A method of compressing fibrous bodies which are held in place on a perforated support by means of negative pressure. Each fibrous body to be compressed is arranged on a first support that includes parts with and without perforations. A first compression of the fibrous body is then brought about over the part without perforations. The partly compressed fibrous body is then transferred to a second support which includes perforations in a part covered by compressed portions of the fibrous body and a part without perforations covered by uncompressed portions of the fibrous body. A second compression of the fibrous body is brought about in those portions of the fibrous body which cover the part without perforations of the second support.