The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Defibrator

a machine used in the manufacture of cellulose paper for preparing wood pulp. Chips are obtained by chopping up wood for pulp or waste products of sawmills; then these chips are steamed at a pressure of 10-12 kilograms-force per sq cm and a temperature of 165°-175° C and are afterward grated and mashed. The working parts of a defibrator are metal disks (fixed and rotating), between which the wood is grated. The capacity of a defibrator is up to 25 tons of air-dried pulp in a 24-hour period.

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Refiner

References in periodicals archive

In: SUNDS DEFIBRATOR TECHNICAL SEMINAR, 9., 1992, Williamsburg.

EVALUATION OF THE EFFECT OF VARIABLES PROCESS OF CELLULOSIC PULP BLEACHING WITH HYDROGEN PEROXIDE/AVALIACAO DO EFEITO DAS VARIAVEIS DE PROCESSO NO BRANQUEAMENTO DE POLPA CELULOSICA COM PEROXIDO DE HIDROGENIO

Rubberwood chips were also disintegrated in a defibrator using a pressure of 0.85 MPa and a temperature of 165[degrees]C for 3 minutes for the face layers of the panels.

Properties of sandwich-type particleboard panels made from rubberwood and Eastern redcedar

The greenfield MDF plant will be the first in Ukraine with a continuous press and an EVO Defibrator system, designed for production of 37 tons/hour of unresinated fibre.

Metso Corporation to supply a new fibre preparation line In Ukraine

in Camas and Baton Rouge, and for Sunds Defibrator in Atlanta.

OBITUARIES

Names such as Tampella and Sunds Defibrator are now under the Metso banner.

Finishing strong: how Finland stays on top

Previously he worked in finance at ABB Company, in plant development at Forest Chemical Ltd., and in R&D at Sunds Defibrator Ltd.

Identify, measure, visualize your technology assets: a study of Finnish companies yields a tool box of 31 indicators for assessing a firm's technology strategy and management processes. (Managers at Work)

Rauma has four business groups: Timberjack, which produces forest machinery; Sunds Defibrator, which supplies fiber-processing technologies and systems; Nordberg, which manufactures rock-crashing equipment and systems; and Neles Controls, which specializes in industrial valves and flow control systems.

Rauma Corp. and Valmet Corp

In addition to Nordberg, Rauma Corporation's business groups are Timberjack (forest machines), Sunds Defibrator (fibre processing technology and systems) and Neles-Jamesbury (industrial valves).

Nordberg - designing solutions for the mining industry

Albany International Cascades Casco Centre de Technologie Noranda CRIQ Diachem Domtar Donohue DuPont Canada Forintek Gaz Metropolitain Hymac James Maclaren Kruger Niagara Lockport Norton Canada Oxychem Canada Perkins Papers Quebec and Ontario Paper Sentinel Canada Sunds Defibrator Tembec Virchem West Coast Wires

Partners in the future?

After the cooling step, the bamboo chips treated were transferred to the defibrator where it was added 500 mL of 1% NaOH during 3 min, for the removal of the remaining lignin on the fibers.

Bamboo cellulosic pulp produced by the ethanol/water process for reinforcement applications/Polpa celulosica de bambu produzida pelo processo etanol/agua para aplicacoes de reforco

Large veneer pieces were chipped into particles using a laboratory type hammermill and were disintegrated in a pilot type of defibrator using a pressure of 0.80 MPa at a temperature of 165[degrees]C for 2 minutes to produce raw material for the panels.

Properties of rubberwood medium-density fiberboard bonded with starch and urea-formaldehyde

Names such as Tampella and Sunds Defibrator are now under the Metso banner, and archrival Beloit is no more.

On the road again