| 摘要 |
A plant for producing, under dry conditions, a web-formed product by compounding different materials, including fibres, is disclosed. The plant comprises an endless, during operation mainly horizontally running perforated forming belt (2), a beneath the belt placed suction unit (3), and at least one above the belt placed material distributor (1) with a housing (13) having side walls (14) and a top wall (15). The housing is divided in the vertically direction into distribution steps (4, 5, 6) each with a seaparate perforated base (16, 17, 18) and each with a set of rotors (19, 20, 21) with wings (32) for distribution of the materials over the base. The distribution steps are each equipped with independent material inlets (7, 8, 9) for materials of different size and different density. Each material inlet feeds the respective step with material having a greater rate of fall, in air, than the material which is feeded from the material inlet of the underlying step. The web-formed product thereby can be produced with a more even and uniform structure and at the same time greater relative strength than known before. The plant is particularly suited for the production of, by way of exemple, nappies, sanitary towels, incontinence pads with a content of a super absorbent agent in form of e.g. a powder, cellulose fibres and long thermo-binding fibres. |
