Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Particular raw cellulosic materials
Reexamination Certificate
1999-11-04
2001-01-30
Chin, Peter (Department: 1731)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Particular raw cellulosic materials
C162S096000, C162S091000, C162S097000, C162S098000, C162S099000, C162S148000
Reexamination Certificate
active
06179959
ABSTRACT:
BACKGROUND OF THE INVENTION AND RELATED ART STATEMENT
The present invention relates to a method of making kenaf pulp to make paper.
Kenaf is an annual plant belonging to a cotton rose in Malvaceae originating in West Africa, and has been attracted as a non-lumber pulp raw material instead of lumber pulp in view of protection of forests.
Conventionally, in order to make paper from pulped kenaf, core is peeled from kenaf and is crushed, and then, the crushed core is boiled with an alkali solution, such as sodium hydroxide or sodium hydroxide added with soap or the like.
However, it is not necessarily advantageous to process kenaf chemically with the alkali solution for making kenaf pulp in view of preparation of a chemical process equipment and waste liquid disposal equipment, and in view of environmental pollution resulting from waste liquid disposal.
Accordingly, an object of the present invention is to provide a method of making kenaf pulp easily to make paper without chemical processing.
Further objects and advantages of the invention will be apparent from the following description of the invention.
SUMMARY OF THE INVENTION
To achieve the above object, the present invention provides a method of making kenaf pulp, which comprises: cutting core, rind, root and stalk of kenaf into a certain length to form chips, respectively; crushing the chips by mixing the chips with water in crushing means; and boiling the crushed chips with water.
When the crushed chips of kenaf are boiled with water, fibers of kenaf are separated into pulp fibers.
Also, in the first process, stalk of kenaf is separated into core and rind before cutting kenaf into the chips.
Further, the chips processed in the method can be formed of one of the rind, core, stalk and root, or can be formed of a mixture of the rind and core, or a mixture of the rind, core and root.
REFERENCES:
patent: 789416 (1905-05-01), Drewsen
patent: 5718802 (1998-02-01), Collier
Hiraga Kunio
Kamano Yoshiaki
Chin Peter
Halpern Mark
Kaensaka & Takeuchi
Kamano Yoshiaki
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