KR20040021798A - Paper Container and Process of Preparing the Same - Google Patents

Abstract

PURPOSE: A paper container and a method for manufacturing the same are provided to use a corrugated paper instead of a stencil paper to reduce the manufacturing cost in raw material and facilitate the recycle of the paper container. CONSTITUTION: A paper container is composed of a paper tube(1), a lower cover(2) engaged with the lower surface of the paper tube, and an upper cover(3) for opening/closing the upper surface of the paper tube. The waste corrugated paper is mixed with water in a water tank and heated up to 20 minutes. A corrugated paper is crushed by a roller and mixed with starch and wheat flour in a paste state. The paste mixture is dried and pressed in a mold. The pressed product is cut in a certain length and dried to have the certain amount of contained water.

Description

Paper container and process of manufacturing the same {Paper Container and Process of Preparing the Same}

Field of invention

The present invention relates to a paper box. More specifically, the present invention relates to a paper box shaped like a cylindrical or octagonal pillar for packaging solids or powdered goods and a method of manufacturing the same.

Background of the Invention

Branch offices are used in almost all industries today. Various paper boxes are used to store various solids and powder products.

The paper box used so far is first manufactured into a cylindrical paper tube, and then the bottom surface is sealed again with a paper member and the top surface is sealed with a paper lid. In order to manufacture cylindrical paper tubes, paper makers produce paper for paper (hereinafter referred to as 'paper'), which paper manufacturers buy, cut the paper to a certain length, and paste the cut paper one by one. It is continuously wound several layers in diagonal directions to produce a cylindrical body.

Since many chemicals are used to produce raw paper, it causes serious environmental problems such as waste water pollution and air pollution. In addition, the equipment for producing raw paper is a kind of equipment industry, which requires huge cost and manpower, resulting in high cost and low efficiency profit structure.

Therefore, the present inventors have developed a method for producing paper tubes directly from waste cardboard without producing original paper as in the prior art using waste cardboard, and filed with a patent application No. 2002-37966 (filed on July 2, 2002). There is a bar. In the present invention, the paper box was developed using the paper tube developed in Patent Application No. 2002-37966.

It is an object of the present invention to provide a method that can produce a cardboard box using only corrugated paper without using original paper.

Another object of the present invention is to provide a method that can produce a paper box that does not require a conventional paper production process by using only corrugated paper, not using paper.

Still another object of the present invention is to provide a method capable of producing a cardboard box which is free from pollution during manufacturing of the cardboard pipe by manufacturing the paper pipe using cardboard.

Still another object of the present invention is to provide a method for producing a paper box at a very low price compared to a conventional paper pipe.

Still another object of the present invention is to provide a method for producing a paper box that can be reproduced without any problem when the used paper pipe is repeatedly reused or cannot be reused repeatedly.

Another object of the present invention is to provide a paper box manufactured without the need for a paper production process by using only corrugated paper without using paper.

The above and other objects of the present invention can be achieved by the present invention described below.

1 is a schematic exploded perspective view of a cylindrical paper box of one embodiment according to the present invention.

Summary of the Invention

The paper box according to the present invention is first (1) remove impurities and put the selected corrugated cardboard in a water tank (water tank) so that the weight ratio of the corrugated cardboard: water is about 1: 5, and (2) the tank by heating 20 Boiling at 100 DEG C for at least 100 minutes, (3) grinding the cardboard first with a grinding roller, and (4) 10 to 15 parts by weight of starch and 3 to 7 parts by weight of flour to 100 parts by weight of the corrugated cardboard composition. (5) the composition is secondly crushed again by a grinding roller, and (6) the flour paste boiled at 100 ° C. in the composition is mixed so that the weight ratio of the corrugated cardboard: flour paste is about 1: 0.6 to 0.9 to a paste state. (7) The paste composition was dried so that the weight ratio of composition solid content: moisture was about 1: 1.2, (8) the composition was extruded from a mold, and (9) the extruded product was Cut to length, and ( 10) preparing a branch pipe according to the step of drying the cut product to have a moisture content of less than 2%, extrude the composition of (7) in the form of a sheet (sheet), and the lower and upper lids from the extruded sheet It is made by manufacture.

Hereinafter, the content of the present invention will be described in detail.

Detailed Description of the Invention

In the present invention, various kinds of branch pipes are first manufactured using corrugated cardboard. Corrugated cardboard is a box paper that is commonly seen around us. Impurities such as metal and PVC are removed from the corrugated cardboard and cut into a certain size. Although it is preferable to cut so that it may be about 150 * 150 mm in width x length, it is not necessarily limited to this. It can be easily cut using a common cardboard cutter.

The cut cardboard should be soaked in water. Usually, the corrugated cardboard: water weight ratio of about 1: 5 is added to a water tank, which is stirred evenly and left for at least 2 hours to allow the cardboard to be sufficiently wet with water.

The corrugated paper soaked sufficiently in the water bath is transferred to a heating tank with water and heated at 100 ° C. for at least 20 minutes. It is preferable to boil for 20 to 30 minutes. This allows to sterilize and disinfect the corrugated cardboard, to swell the fibers and to evaporate the moisture. After boiling for about 25 minutes, about 30% of the water evaporates.

The corrugated cardboard in the heating tank is transferred to the grinding roller together with water, and the corrugated cardboard is first crushed continuously. It is preferable to grind it three times and in the process, about 10% of the water is further evaporated.

Starch and flour are mixed in the primary pulverized cardboard composition. Based on 100 parts by weight of cardboard, about 10 to 15 parts by weight of starch and about 3 to 7 parts by weight of flour are mixed. Starch and wheat flour increase the strength of the final product, which is the final product, and when grinding with a grinding roller, the grinding efficiency is increased, and because it is not harmful to human body or environmental pollution, it does not cause pollution. Even when playing it does not cause any problem.

The cardboard composition in which the starch and the flour are mixed is pulverized with a grinding roller. In the case of secondary grinding, it is preferable to grind using a plurality of grinding rollers, but it is usually preferable to grind using five grinding rollers. The pitch from the first grinding roller to the fifth grinding roller is lowered one by one to completely fibrous corrugated paper.

The wheat flour boiled at 100 ° C. is mixed with the second milled composition. Flour paste acts as a lubricating action to homogenize the distribution of corrugated fiber, starch and flour components, to strengthen the strength of the finished product, and to reduce friction with the mold during extrusion. Flour paste is boiled by diluting so that the weight ratio of flour: water is about 1: 6, and mixing so that the weight ratio of cardboard: flour paste is about 1: 0.6-0.9. In this way, a composition of a paste state is prepared, and the composition has a weight ratio of corrugated cardboard (hereinafter referred to as "composition solid content"): moisture including starch and the like in the range of about 1: 3.

The paste composition is dried to obtain a weight ratio of composition solids to moisture of about 1: 1.2. This paste composition is a composition for extrusion molding a branch pipe and contains about 40 to 47% by weight of composition solids.

An extrusion process may be performed to homogenize the final paste composition for extruding the branch pipe. This extrusion process is not intended to produce a product, but to homogenize the fibrous components of the corrugated cardboard, homogenize the starch and flour components, and homogenize the moisture to facilitate the next extrusion process to produce the product.

The corrugated cardboard composition in the paste state is extruded by extrusion molding. In the extrusion mold, after determining the diameter, thickness and length of the branch pipe, the raw material composition is extruded. The extruded branch pipe is cut to a constant length. In the present invention, not only the cylindrical branch pipe, but also the branch pipe having a polygonal cross-sectional structure such as 4, 6, 8, etc. according to the shape of the extrusion mold can be produced.

The cardboard composition is extruded in the form of a sheet, and bottom and top lids are prepared from the extruded sheet. The lower lid and the upper lid are manufactured by pressing the extruded sheet, and this method can be easily carried out by a person of ordinary skill in the art. According to the shape and size of the branch pipe to be manufactured to manufacture the bottom lid and the top lid.

The capillary press lid cut in the above is dried by passing through a microwave chamber (chamber). In the microwave chamber, the process of drying the branch pipe and the lid is preferably repeated 2 to 4 times of drying and cooling. In one embodiment, drying in the chamber for about three minutes is followed by cooling through a fan wind for about two minutes, preferably repeating this operation two to four times. The final moisture content of the tubes and lids is thus less than 2%.

It is preferable to apply | coat with a coating agent in consideration of durability of a paper box, a texture, etc. The coating agent used here is a thin flour paste solution, in which a diluted composition of about 1: 10 is boiled at a temperature of 50 to 70 ° C. for 3 to 5 minutes in a weight ratio of flour to water. The coating agent and the lid are sufficiently wetted and applied to the coating solution in the above temperature range. The paper tube and the lid to which the coating agent is applied are dried in a rotary drying furnace.

1 is a schematic exploded perspective view of a cylindrical paper box of one embodiment according to the present invention. The lid 2 is bonded to the bottom surface of the manufactured paper tube 1 and sealed with an adhesive. On the side of the paper tube 1, a printing paper printed with the contents related to the goods packaged inside is attached. After the contents are put in the paper box, the lid 3 is finally closed to complete the packaging.

The invention can be better understood by the following examples, which are intended for the purpose of illustration of the invention and are not intended to limit the scope of protection defined by the appended claims.

Example

Impurities such as adhesive tapes and staples were removed from the collected waste boxes and cut into a size of about 150 × 150 mm. 750 g of the cut cardboard was added to a water bath with 4000 ml of water and left for 2 hours to allow the cardboard to be sufficiently wet with water.

Cardboard with water was put in a heating tank and heated to boil at 100 ℃ for 25 minutes. About 30% of 1200 ml of water was evaporated and 2800 ml of water remained.

The heated corrugated cardboard was transferred to a grinding roller for three consecutive grinding. In this process, about 10% of the water evaporated and about 2500 ml of water remained.

100 g of starch and 40 g of wheat flour were mixed in the ground cardboard composition. The mixed composition was further ground five times in five grinding rollers.

80 g of flour was diluted in 500 ml of water and boiled at 100 ° C. to prepare a wheat flour paste, which was then mixed with the cardboard composition to prepare a composition in the form of a paste having a composition solid content: moisture of about 1: 3.

Felt the composition to prepare a composition in the form of a paste (solid content: moisture of about 1: 1.2), which is passed through an extruder to homogenize the viscosity of the fibers, starch and flour of the waste cardboard, and the moisture. It was.

Through extrusion, the tube was extruded into a tube 70 mm in diameter and 4 mm thick, which was cut to a length of 200 mm.

The prepared branch pipe was dried in a microwave oven for 3 minutes, taken out, cooled for 2 minutes while passing through a fan wind, and this was repeated three times. The paper tube thus manufactured had a final water content of 2% or less.

The cardboard composition was extruded in the form of a sheet, and bottom and top lids were prepared from the extruded sheet.

30 g of wheat flour was diluted in 300 ml of water and boiled at a temperature of 60 ° C. for 4 minutes to prepare a coating solution, and the coated solution was wetted with the prepared tube and lid. The paper tubes and lids were taken out and dried in a rotary dryer.

The paper tubes and lids manufactured in this way have a water content of 2% or less, have a good surface texture, and do not use chemicals at all, and do not cause environmental pollution or pollution problems, and are very easy to reproduce. The lid 2 was attached to the bottom surface of the prepared paper tube 1 to seal the adhesive to prepare a paper box capable of packing the contents.

The present invention does not require the paper production process by using only corrugated paper, without the use of raw paper, no pollution occurs, can produce the paper box at a very low price, it can be reused repeatedly or repeatedly reused paper If not, it has the effect of the invention that can produce a paper box that can be reproduced without any problem.

Simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.

Claims (4)

Waste corrugated cardboard selected by removing impurities is put in a water tank so that the weight ratio of waste cardboard to water is about 1: 5, soaked sufficiently, and the tank is heated to boil at 100 ° C. for at least 20 minutes, and the waste cardboard is crushed. Firstly pulverized, and mixed with the pulverized cardboard composition, 10 to 15 parts by weight of starch and 3 to 7 parts by weight of wheat flour with respect to 100 parts by weight of waste cardboard, and the composition is pulverized again by a grinding roller, and The flour paste boiled at 100 ° C. in the composition is mixed so that the weight ratio of waste cardboard: flour paste is about 1: 0.6 to 0.9 to prepare a composition in a paste state, and the paste state composition is a weight ratio of composition solid content: water. : Dry to 1.2, extrude the composition from a mold, cut the extruded product to a certain length, and bring the cut product to within 2% moisture content Branch pipe (1) produced by the drying step; A bottom lid (2) extruded from the extruded sheet to form a sheet, wherein the cardboard composition is joined to and sealed to the bottom of the branch pipe; And Lid (3) for opening and closing the upper surface of the branch pipe; Persistence, characterized in that consisting of. The solution of claim 1, wherein the branch pipe and the lid are dried, and then the branch pipe and the lid are diluted with a flour paste solution, and a solution of about 1: 10 of which is boiled for about 3 to 5 minutes at a temperature of 50 to 70 ° C. in a weight ratio of flour to water. It is produced by coating with a coating agent on the top and drying. (1) remove the impurities and corrugate the selected cardboard into a water tank so that the weight ratio of corrugated cardboard to water is about 1: 5; (2) heating the bath to boil at 100 ° C. for at least 20 minutes; (3) first grinding the cardboard with a grinding roller; (4) mixing 10 to 15 parts by weight of starch and 3 to 7 parts by weight of flour with respect to 100 parts by weight of the corrugated cardboard composition; (5) crushing the composition again with a grinding roller; (6) mixing the flour paste boiled at 100 ° C. to the composition such that the weight ratio of cardboard to flour paste is about 1: 0.6 to 0.9 to prepare a composition in paste state; (7) drying the composition in the paste state such that the weight ratio of composition solids to moisture is about 1: 1.2; (8) extruding the composition from the mold; (9) cutting the extruded product to length; And (10) drying the cut product to have a water content of 2% or less, thereby manufacturing branch tubes; Extruding the composition of item (7) in the form of a sheet, and manufacturing a bottom and top lid from the extruded sheet; Sealing the bottom lid (2) to the bottom surface of the branch pipe (1); And Assembling the upper lid (3) of the branch pipe to the top surface of the branch pipe; Method for producing a paper box, characterized in that consisting of steps. The solution according to claim 3, wherein the branch pipe and the lid are dried, and then the branch pipe and the lid are diluted with a flour paste solution, and the diluted composition of about 1: 10 in a weight ratio of flour to water is boiled at a temperature of 50 to 70 ° C. for 3 to 5 minutes. A method for producing a cardboard box, which is prepared by coating with a coating agent on a stomach and drying.