hydrapulpern.
/ˈhʌɪdrəpʌlpə/ Paper-making.
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.
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society > occupation and work > equipment > paper-making equipment > [noun] > for breaking down lumps in pulp
refiner1713
hydrapulper1941
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.
This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2020).
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n.1941