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PROCESS FOR PRODUCING HALF-FINISHED PRODUCTS AND BODIES FROM CELLULOSE AND/OR CELLULOSE-CONTAINING FIBROUS MATERIALS

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Title:
PROCESS FOR PRODUCING HALF-FINISHED PRODUCTS AND BODIES FROM CELLULOSE AND/OR CELLULOSE-CONTAINING FIBROUS MATERIALS
Author: DOPFNER HORST ; ERNEGG MARTIN ; BRAMSTEIDL ROBERT
Subjects: CHEMISTRY ; COMPOSITIONS BASED THEREON ; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS ; FIBREBOARD ; FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT ; IMPREGNATING OR COATING OF PAPER ; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS ORFROM PAPIER-MACHE ; METALLURGY ; ORGANIC MACROMOLECULAR COMPOUNDS ; PAPER NOT OTHERWISE PROVIDED FOR ; PAPER-MAKING ; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D ; PRODUCTION OF CELLULOSE ; PULP COMPOSITIONS ; TEXTILES ; THEIR PREPARATION OR CHEMICAL WORKING-UP ; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
Description: A process for producing a work piece includes providing raw material which is cellulose-containing and fibrous, which is not any part of a tree, and which is selected from the group consisting of, crude plant fibers, pure cellulose, waste paper, and waste cardboard; adding water to the raw material; finely chopping the raw material in a machine by continuously grinding the raw material with a total energy expenditure of at least 0.5 kWh/kg, based on dry weight of the raw material, into a microfiber pulp having an increased internal fiber surface and an increased degree of interlinking; forming the microfiber pulp to provide a shaped green body; and drying the shaped green body by removing water therefrom to harden the shaped green body and form a work piece, wherein the shaped green body is hardened into the work piece by drying only without admixture of bonding agents to the microfiber pulp and without use of external pressure, and wherein the work piece has characteristics which depend on degree of grinding to produce the microfiber pulp and which range from (a) paper carton-like to (b) wood-like to (c) horn-like, the work piece having a specific gravity which ranges up to that of pure cellulose, 1.5.
Creation Date: 1998
Language: Czech;English
Source: esp@cenet

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PROCESS FOR PRODUCING HALF-FINISHED PRODUCTS AND BODIES FROM CELLULOSE AND/OR CELLULOSE-CONTAINING FIBROUS MATERIALS

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