KR20090085442A - Printing paper including pulp of citrus peel - Google Patents

Abstract

A printing paper containing a citrus meal pulp is provided to recycle waste generated during the citrus processing procedure and reduce manufacturing price. A printing paper is produced using a mixed pulp containing 5~95 weight% of citrus meal pulp and 5-95 weight% of wood pulp. A method for producing the citrus meal pulp comprises: a step of remove impurities from peel of citrus and washing with water; a step of adding in 2~5 weight% sodium hydroxide solution; a step of removing foreign materials using a centrifuge; and a step of washing and dehydrating.

Description

Printing paper including citrus foil pulp {Printing paper including pulp of citrus peel}

The present invention relates to a printing paper comprising citrus foil pulp, and more particularly, to a printing paper prepared by mixing pulp and wood pulp obtained by cooking citrus fruit foil.

Citrus fruits, including citrus fruits and oranges, are eaten at home and are used as raw materials for various processed foods, including beverages. Some of the shells produced are used as ingredients of Chinese medicine or feed for livestock, but only a fraction of them are discarded as they are, and some are illegally dumped to pollute the environment. Therefore, it is necessary to find ways to reduce the causes of pollution on land and sea and to create new added value by reusing citrus peels.

As one of such measures, the present inventors have provided a method of manufacturing Hanji by extracting fibers from citrus foil from paper containing citrus fruit fiber and then mixing with mulberry fiber prior to the present invention. Hanji according to the above technology has the advantage of excellent strength, moisture permeability, storage capacity, but low cost, but it is difficult to mass production because it requires a manual process to produce a high-quality product, thereby limiting the consumption of citrus peel.

Accordingly, the present inventors provide a method for manufacturing printing paper using pulp extracted from citrus foil, which can consume both citrus peel and satisfactorily in terms of cost and strength. To provide the same writing supplies.

An object of the present invention is to provide a printing paper excellent in strength and opacity by using pulp prepared from discarded citrus foil as a printing paper material.

Another object of the present invention is to reduce the cost of printing paper as well as environmental pollution by recycling the waste generated in the citrus processing.

Specifically, the printing paper of the present invention is manufactured using a mixed pulp consisting of 5 to 95% by weight of citrus gourd pulp and 5 to 95% by weight of wood pulp extracted from citrus peels such as citrus fruits, lemons, oranges, dogs and Hallabong. One printing paper may be used as a conventional copy paper or printing paper, and may be used to manufacture writing supplies such as notes, notebooks, and memo papers.

For reference, in the present invention, citrus fruits refer to citrus fruits such as citrus fruits, lemons, oranges, dogs, and Hallabong, and citrus fruit pulp refers to pulp extracted from citrus peels such as citrus fruits, lemons, oranges, dogs, and Hallabong. .

The manufacturing method of the printing paper of the present invention is largely made of a manufacturing step of citrus foil pulp and paper manufacturing step, the manufacturing step of the citrus foil pulp is a raw material preparation step, cooking step, dusting and selection step, washing and concentration step The paper manufacturing step is made of a pulp mixing and dissociation step, beating step, chemical addition step, selection and papermaking step, pressing and drying step, calendar ring and cutting step.

In the manufacturing step of citrus foil pulp, in the raw material preparation step to remove impurities contained in the peel of the citrus fruits and wash with water.

In the cooking stage, the citrus gourd ingredients are put in an aqueous sodium hydroxide solution and boiled. At this time, if the concentration of the sodium hydroxide solution is too low or the boiling time is too short, the cooking becomes incomplete, and if the concentration of sodium hydroxide is too high or the boiling time is too long, the fiber goes to the fiber. Since the strength and yield of the pulp may be reduced due to damage, it is preferable to cook for 20 to 50 minutes with 2 to 5% by weight aqueous sodium hydroxide solution.

In the dust removal and selection process, the centrifugal vibration remover removes foreign substances mixed in the fibers and evens the fibers.

In the washing and concentration step, the fiber is washed with water and dehydrated to remove chemicals and the fiber is concentrated to produce citrus foil pulp.

In the pulp mixing and dissociation step in the paper manufacturing step, the citrus foil pulp and the wood pulp are mixed. If the amount of the citrus foil pulp is too small, the effect of cost reduction and strength increase is reduced. Since the whiteness of is too low, it is preferable to mix the citrus fruit pulp 5 to 95% by weight and the wood pulp 5 to 95% by weight based on the dry weight. The mixed pulp is dissociated by adding water.

In the beating step, the mixed and dissociated pulp is beaten using a refiner.

In the chemical addition step, additives are mixed as necessary to give characteristics according to the purpose of use of the paper.The additives are selectively mixed with chemicals such as size agent, strength enhancer, retention agent, antifoaming agent, dye, etc. as necessary. If necessary, a chemical agent for preventing the spread of ink or the generation of static electricity may be further mixed.

In the selection and papermaking step, the pulp is evenly picked, foreign matters are removed, and papermaking is carried out in the form of paper.

In the pressing and drying step, the paper is compressed, dehydrated and dried.

In the calendar ring and cutting step, the thickness of the paper is made uniform and the sheet is cut in the form of a roll to produce printing paper.

The printing paper produced through the above process is not only excellent in strength and opacity, but also has a low manufacturing cost because it recycles waste generated from citrus processing, and is used as a normal copy paper, print paper, notebook, notebook, memo paper, etc. Writing utensils can be used in the manufacture.

The printing paper containing the citrus fruit pulp of the present invention not only has excellent strength and opacity, but also recycles waste generated from citrus fruit processing, which has a low manufacturing cost and reduces environmental pollution.

The following examples are provided to aid in understanding the present invention.

Example 1

[Step 1-1] Preparation of Citrus Foil Pulp

Prepare citrus peel, remove impurities, wash with water, add to 5% by weight aqueous sodium hydroxide solution and cook for 30 minutes, remove the foreign matter using a centrifugal decanter and select, wash with water Dehydrated citrus fruit pulp was prepared.

[Step 1-2] Preparation of Paper

The citrus foil pulp and wood pulp are mixed at a weight ratio of 1:19 based on dry weight, followed by dissociation by adding water corresponding to 9 times the pulp weight, beating with a refiner, and then dried mixed pulp. 5 g of size agent and 5 g of antifoam were added per kg. After preparing the pulp evenly and removing foreign matters and papermaking in the form of a paper, after pressing and dehydration and drying, the thickness of the paper is uniformly calendered and cut in the form of a sheet to prepare a printing paper.

Example 2

[Step 2-1] Preparation of Citrus Foil Pulp

Citrus fruit pulp was prepared in the same manner as in Example 1-1.

[Step 2-2] Preparation of Paper

In Example 1-2, the printing paper was prepared in the same manner as in Example 1 except that citrus foil pulp and wood pulp were mixed at a weight ratio of 1: 1 based on the dry weight.

Example 3

[Step 3-1] Preparation of Citrus Foil Pulp

Citrus fruit pulp was prepared in the same manner as in Example 1-1.

[Step 3-2] Preparation of Paper

In Example 1-2, the printing paper was prepared in the same manner as in Example 1, except that citrus foil pulp and wood pulp were mixed in a weight ratio of 19: 1 based on the dry weight.

The printing paper of the present invention prepared according to the above embodiment is superior in strength and opacity as compared to conventional printing papers, and has a low cost feature. It was also suitable for the manufacture of writing instruments such as.

Claims (3)

Printing paper, characterized in that manufactured using a mixed pulp consisting of 5 to 95% by weight of citrus foil pulp and 5 to 95% by weight of wood pulp. The method of claim 1, The citrus foil pulp is prepared by removing the citrus peel, washed with water, and then added to 2 to 5% by weight aqueous sodium hydroxide solution and cooked for 20 to 50 minutes, and then using the centrifugal vibration damper After removing and selecting, printing paper, characterized in that prepared by washing with water and dehydration. A writing article prepared using the printing paper of claim 1 or 2, wherein the writing article is one of notes, notebooks, and memo papers.