| 摘要 |
The invention relates to the glueing method at the manufacturing of fibre bodies, disks, profiles, panels, insulating carpets, packing material etc - according to the dry method. It consists in the fact that the glue is composed of water glass powder, which is mixed with the fibres which have been somewhat moistured before or during the blending and then, together with the fibres are blown into the moulder to be die-pressed to intended fibre body. During the process the glue powder is dissolved in the water present, transcending into plastic or liquid form so as to aggluminate the fibres, whereupon it dries and hardens into a solid bond during the die-pressing. To make the method work satisfactorily the silicatepowder ought to contain some water, bound as gel-liquid or water of crystallization in the alcali silicate. Thus, spray-dried water glass is appropriate as glue powder. To improve the water resistance of the fibre bodies a hardener transcending the alcali silicate to water insoluble silicates can be added. Suitable hardeners are magnesium oxide, zinc oxide or titanium dioxide. |
