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EL REFINO DE LAS PASTAS PARA PAPELES "KRAFT"

JUNE 1928   -  Volume: 3 -  Pages: 8-11

DOI:

[No data]

Authors:

JUAN R. ALDAMIZ ECHEVARRIA

Disciplines:

  • Industrial technology (PROCESOS INDUSTRIALES )

Downloads:   199

How to cite this paper:  
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Received Date :   1 June 1928


Key words:
[No data]
Article type:
ARTICULO DE INVESTIGACION / RESEARCH ARTICLE
Section:
VARIOUS

Con el nombre aleman de «kraft» (fuerza) se designa cierta variedad de papeles caracterizados por su resistencia elevada, y cuyas muchas aplicaciones (para envoltorios, sacos, aislantes de cables, sustitución de tejidos de yute, y en general, en casos que se exige del papel mas, una alta resistencia, que bello aspecto) hace que sea de los papeles mas empleados. Las condiciones de resistencia-permeabilidad, plegado, uniformidad de espesor, etc., que generalmente se exigen a tales papeles, hace que sea, entre los papeles «no especiales» uno de los mas diffciles de fabricar y maxime cuando no se tiene instalaciones apropiadas a ello; como ocurre en nuestras fabricas. Y es especialmente en el refino de la pasta donde, a decir de los fabricantes, esta el secreto del «kraft». La primera materia empleada para. su fabricación es la pasta química, impropiamente llamada «sosa kraft», que se obtiene limitando la duración del lejiado al sulfato, de modo que la operación resulte incompleta. La pasta quimica así obtenida, de color marrón, mas o menos acentuado seglin haya sido menor o mayor el lejiado, se desagrega en los molinos con dificultad, tanto mayor, cuanto mas acentuado sea el color (fibra menos atacada) de un empleando agua caliente.

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