hydrapulper Paper-making.
(ˈhaɪdrəpʌlpə(r))
Also Hydrapulper.
[Irreg. f. Gr. ὑδρ(ο-, combining form of ὕδωρ water + pulper.]
A large vessel with a set of motor-driven rotating vanes at the bottom, designed to break up the fibres of wood pulp or other paper stock in water.
| 1941 Techn. Pap. Addr. Techn. Assoc. Pulp Pap. Ind. XXIV. 384/2 The hydrapulper is simply a cylindrical open-top tank with a dished bottom at the center of which is a heavy impeller. 1951 J. N. Stephenson Pulp & Paper Manuf. II. i. 67 Straw bales..are fed as rapidly as possible into a Hydrapulper..containing the required amount of chemical in hot water. 1966 Paper Technology VII. ii. 135 These rejects are in a suspension and could possibly be extracted from the bottom of the hydrapulper tub. 1967 E. Chambers Photolitho-Offset xvi. 244 This acidity in uncoated paper can be traced to aluminium sulphate, which is added in the beater or hydrapulper during paper manufacture. |