| 摘要 |
The present invention relates to a protective board forming part of a packing for cylindrical rolls (1) of wound webs of material, especially paper webs, the packing comprising a sheet- or web-shaped wrapping (3) to be arranged on the circumferential surface of the roll, and the protective board (4, 4') which is adapted to be arranged on one of the two opposite end surfaces of the roll. To be able to absorb blows and impacts and to reduce the risk of deforming the web of material, for example when placing the roll end surface on a rough or uneven surface, the protective board has a thickness in the range of 5-12 mm and is made of a porous or medium hard fibreboard which has a density in the range of 100-750 kg/m<3> and is composed of long fibres, e.g. from waste paper or papermaking pulp, and short fibres preferably deriving from sawdust, the portion of short fibres amounting to 70-90 % of the total dry solids content of the fibreboard. |
