| 摘要 |
A method to produce a perforated web material, wherein the web material (N) is fed through a nip ( 11 ) between a first roller ( 7 ) and a second roller ( 9 ) rotating in opposite directions and pressed against each other, the first roller ( 7 ) being provided with protuberances ( 7 P) for perforation. Characteristically, the web material is heated before being fed into said nip. |
