KR100919519B1 - Paper board with expanded perlite and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a paperboard, and more specifically, the pearlite base 10 is provided to include 10 to 30 parts by weight of expanded pearlite, 2 to 10 parts by weight of water with respect to 70 to 90 parts by weight of pulp, the pearlite base paper It relates to a paper board using a pearlite so that the liner paper 15 is included on one or both sides of (10), so that even if the manufactured paper board is thick, it is light and suitable for use as a paper board.

Description

PAPER BOARD WITH EXPANDED PERLITE AND MANUFACTURING METHOD THEREOF}

The present invention relates to a paper cardboard, and more particularly, paper cardboard prepared using expanded pearlite, which is provided with a pulp expanded with pulp and is formed so that liner paper is formed on both sides so that it is thick and light and convenient to use. It is about.

In general, papermaking is made from pulp, and the raw material is made of natural pulp, synthetic fibers and the like. In particular, natural pulp is used in a variety of materials, such as wood, hemp, paper mulberry, rice straw, sugar cane, papyrus.

Paperboard made from such paper is subjected to the beating process of pulverizing and cutting the fibers of the pulp like papermaking. In the confession process, the various additives such as sizing agents, additives, pigments and dyes are added to the paper. The properties of the cardboard will be better improved.

And paper is made through a paper machine after the confession process, the cardboard is manufactured by making the liner paper on one side or both sides of the base paper.

Such cardboard can be made of only natural fiber material, but since most of the filling member is composed of a built-in structure, the paper is composed of recycled paper, paper, etc., and the outer surface of the paper is wrapped with liner paper or coated paper. However, since the base paper, the liner paper, and the like are all made of pulp fibers, there is a problem that the weight becomes so heavy that it is difficult to use the thicker the thickness.

Thus, even if the base paper is provided as a corrugated cardboard in which a plurality of wrinkles are formed, there is a problem that is not suitable for use as a high-quality cardboard.

In addition, since most of the cardboard is used for the purpose, such as a box, even in the case of the liner forming the outer surface is provided with a cheap material there is a problem that the printing performance is reduced.

The present invention for solving the above problems is to provide a paper sheet to be prepared by including the expanded pearlite together with the pulp in the manufacture, there is an object to make it suitable for use as a paper, even if the manufactured cardboard is formed thick. .

In addition, due to the characteristics of the expanded pearlite having a large number of pores, the printing performance is excellent, and even though printing on the outer surface of the paperboard, there is an object to reduce the ink consumption, power consumption and wear of the parts, and the printing condition is also good.

Paperboard (A) using a pearlite of an embodiment according to the present invention for achieving the above object is made of 10 to 30 parts by weight of pearlite, 2 to 10 parts by weight of moisture per 70 to 90 parts by weight of pulp, The pearlite is characterized in that it is provided with expanded pearlite of 2 ~ 100 ㎛ size.

And the paper board (A) using the pearlite of another embodiment according to the present invention is provided with a pearlite base 10 so that 10 to 30 parts by weight of pearlite, 2 to 10 parts by weight of moisture per 70 to 90 parts by weight of pulp, Liner paper 15 is included on one side or both sides of the pearlite base 10, the pearlite is characterized in that it is provided with expanded pearlite of 2 ~ 100 ㎛ size.

Accordingly, the liner 15 includes 10 to 15 parts by weight of a liner additive containing any one or more components of starch, clay, and calcium carbonate based on 70 to 80 parts by weight of pearlite, and the pearlite is 2 to 30 μm. It can be provided with expanded pearlite of size.

In addition, the paperboard (B) using a pearlite of another embodiment according to the present invention is made of a liner paper 15 on one side or both sides of the base paper 20 containing pulp, the liner paper 15 is pearlite (perliter) is included, the perlite is characterized in that it is provided with expanded perlite of 2 to 30 ㎛ size.

And the method of manufacturing a paper cardboard (B) using the pearlite of the present invention according to the present invention is a pulp beating step (S011) to put the pulp raw material into the beating machine (31);

Papermaking step (S012) for putting the sizing agent or filler in the beating machine 31, and manufacturing the base paper 20 using the paper machine 32 using the beaten pulp;

70 to 80 parts by weight of expanded pearlite having a size of 2 to 30 μm on one or both sides of the base paper 20 includes 10 to 15 parts by weight of a liner additive including any one or more components of starch, clay, and calcium carbonate. Liner forming step (S013) to form a liner paper 15 is made;

It characterized in that it comprises a complete step (S014) to complete the manufacturing by drying in a state in which the liner paper 15 is formed on the base paper 20.

Furthermore, the method of manufacturing paper cardboard using the pearlite of another embodiment according to the present invention is a pulp beating step (S021) to put the paper raw material containing 70 to 90 parts by weight of pulp into the beating device (31) together with 80 to 99 parts by weight of water (S021). );

A sizing step (S022) in which a sizing agent is coated on the surface of the pulp fiber by adding a sizing agent comprising at least one of rosin, alum, AKD, and ASA in addition to the beaten pulp;

Additive dosing step (S023) to be added to the beating device 31 is added to the additive consisting of 10 to 15 parts by weight of expanded pearlite having a size of 2 to 100 ㎛ with respect to 70 to 90 parts by weight of pulp (S023);

A paper making step (S024) of manufacturing paper using the paper machine 32 by using the pulp fibers in the beater 31 to be beaten;

It is characterized in that it comprises a complete step (S025) to complete the manufacturing process by drying the wetland after the papermaking step. In addition, using the expanded pearlite prepared by adding an additive including expanded pearlite and talc with a paper raw material In the manufacturing method of paper cardboard, Pulp beating step (S021) to put the paper raw material containing 70 to 90 parts by weight of pulp together with 80 to 99 parts by weight of water in the beating machine 31 (S021); Sizing step (S022) to put a sizing agent on the surface of the pulp fibers by putting the agent; 10 to 15 parts by weight of expanded pearlite having a size of 2 to 100 ㎛ with respect to 70 to 90 parts by weight of pulp in the pulverizer 31 and talc Additive dosing step (S023) by putting the additive containing 10 to 20 parts by weight (S023); Using the paper machine 32 using the pulp fibers in the beater 31 Papermaking manufacturing step (S024) for manufacturing a papermaking; Completed step (S025) to complete the manufacturing by drying the wetland after the papermaking manufacturing step is made, the size of the sizing step (S022) is rosin, reinforcing furnace Gin, petroleum resin, alkyd resin, styrene acrylic resin, acrylic resin, starch, oxidized starch, modified starch is included is included, the additive of the additive injection step (S023), the additives of the cooking agent, bleach, surface A lipid enhancer, an intelligence enhancer, a yield / filament enhancer, and an antifoaming agent are included. The thickening agent includes one or more of sodium hydroxide, sodium carbonate, sodium sulfite, sodium sulfide, methanol, ethanol, and phenol. The bleach is provided containing any one or more of chlorine, chlorine dioxide, hydrogen peroxide, oxygen, the surface lipid enhancer is starch, starch oxide, modified starch, fibrous Any one or more of these are included and provided, wherein the intelligence enhancer is any one of starch, oxidized starch, modified starch, FV, polyacrylamide, urea resin, melamine resin, polyethylene imide, epoxidized polyamide The above yield is provided, the yield improver is provided with any one or more of aluminum sulfate, polyacrylamide, polyethylene oxide, the antifoaming agent is any one or more of higher alcohol, silicone, polyethylene oxide There can be provided a method for producing a paper sheet using expanded pearlite, characterized in that it is provided. And in the paper sheet manufactured by the method of manufacturing a paper sheet using the expanded pearlite, and thus by the manufacturing method The manufactured paperboard has a size of 2 to 100 μm with respect to 70 to 90 parts by weight of pulp. 10 to 15 parts by weight of expanded pearlite, 2 to 10 parts by weight of water, and 10 to 20 parts by weight of talc may be provided.

Hereinafter, with reference to the accompanying drawings will be described in detail.

1 is a cross-sectional view of a paperboard structure of one embodiment using the present invention pearlite, Figure 2 is a flow chart of a method of manufacturing an embodiment of a paperboard using the present invention pearlite, Figure 3 is a paperboard using the present invention pearlite It is a schematic illustration showing the manufacturing process of the.

And Figure 4 is a cross-sectional view of a paper board structure of another embodiment using the pearlite of the present invention, Figure 5 shows a flowchart of a manufacturing method of another embodiment of a paper board using the pearlite of the present invention.

That is, the paper cardboard (A) using the expanded pearlite of the present invention is made of 10 to 30 parts by weight of expanded pearlite, 2 to 10 parts by weight of water, per 70 to 90 parts by weight of pulp, as shown in FIGS.

Thus, perlite used in the present invention is a kind of coppery volcanic rock and is also called perlite. Small pearl-shaped pieces that have concentric or swirling cracks, the structure of which is called a pearl. This pearlite is due to shrinkage during cooling of highly viscous lava or magma or hydrolysis after cooling, and the content of moisture contained in the pearlite is about 2 to 5%. The pearlite (pearlite) has a dense or pearlescent gloss, grey, green, but also brown, blue, red. The components of such pearlite include silicic acid (SiO 2) (approximately 68 to 77 weight ratio), aluminum (Al 2 O 3) (approximately 12 to 18 weight ratio), kali (K 2 O) (approximately 4 to 6 weight ratio), combined moisture 2 to 5 weight ratio, and the like. It is composed of.

Particularly, the pearlite used in the present invention uses heat-treated expanded pearlite, and when the pearlite having a moisture content of about 2 to 5% is heated at about 870 to 1100 ° C., the evaporation pressure generated when the volatile component containing water is vaporized, respectively Expanded perlite is made by expanding granule particles of about 10-20 times into circular glass particles. Such expanded perlite is a material of relatively light state because its volume is increased and its specific gravity is decreased due to the minute gaps caused by the expansion of volatile particles.

The expanded perlite used in the present invention has a specific gravity of 0.04 to 0.2 g / cm 2, a thermal conductivity of 0.04 to 007 W / m · K, and an average sound absorption coefficient (N.R.C.) of 0.06 to 0.7. Therefore, when used as a building material such as a high-rise building because the weight is smaller than the volume, the overall load can be reduced, and the thermal conductivity is low, so that it is excellent in flame retardant performance because of excellent thermal insulation performance. It is chemically neutral (pH 6-7), non-toxic and non-flammable minerals, and has no superior toxic gas. In addition, when used as a thermal insulation coolant has a usage temperature range of -250 ~ 1000 ℃ range can be seen that the range of use.

Therefore, the paper prepared by using such expanded perlite (Expanded Perlite) has the advantage that can be made of high quality paper cardboard with good state light and good moisture absorption performance.

In particular, the expanded size of the expanded perlite (Expanded Perlite) is pulverized to a small size of about 2 ~ 100 ㎛ is put together in the manufacture of paper cardboard to manufacture paper cardboard can be produced a variety of paper cardboard. In practice, the expanded pearlite, which is pulverized by dry and wet, etc., uses a paper having a maximum size of about 2 to 100 μm for use in the present invention. To a few hundred nm size. However, the expanded pearlite having a size of several nm to several hundred nm of less than 2 μm claimed in the present invention is included in the manufacture of paperboard, and such a small sized expanded pearlite evens out the surface of the paperboard and has a structural shape. There is a characteristic which makes it stable and makes the state of a paper board favorable.

Such expanded pearlite pulverization method uses a wet pulverization and a dry pulverization method generally known in the pulverization field, such as a ball mill, a rod mill, a roller mill, a jaw crusher ), Impact Crusher, Wheeler Mill, Gyratory Crusher, Cone Crusher, Hammer Mill, Cage Mill, Air Mill (Air) Grinder) or the like.

In the case of grinding by a general wet ball mill method, for a wet ball mill device of an upright cylinder that is divided into multiple stages up and down, each stage has a ball for grinding freely of different sizes. Water is included together, and dispersants such as caustic soda are included together. Accordingly, the expanded pearlite flowing into the lowermost stage is largely crushed primarily by a ball, and the expanded expanded pearlite is raised to the next stage of the upper stage. In the next stage, the ball is gradually crushed to a smaller size by the free flowing ball. Thus, at the top, it is pulverized and discharged to about 2 to 100 μm of micron size.

The pearlite pulverized by such a pulverization method has a main content of using a suitable maximum particle size of about 2 μm to 100 μm. Therefore, when the expanded pearlite particles formed in the paper sheet are formed to have a particle size of 5 μm, the pearlite particles having a size of 5 μm ± 3 μm are approximately 80%, and the particles having a size larger than the standard are 10%. About 10% and sub-size particles below that level account for about 10%. The expanded pearlite of particles smaller than the reference size is thus crushed not only into micron sized particles but also nano sized particles according to the general grinding apparatus and method listed above, but is not limited to the small size. The nano-sized expanded pearlite does not need to be excluded in the manufacture of paperboard, so the paperboard manufacturing process is performed without filtering. However, particles larger than 100 μm are so large that they are not good for layering paperboard, so they have to be removed using a general particle separation method.

Thus, the expanded pearlite that has been pulverized is limited to a maximum particle size of 2 to 100 μm, and the expanded pearlite particles pulverized into micron or nano-sized units smaller than 2 μm in the crushing process are also included. It can be prepared, including a number of pores are formed in the expanded pearlite of such a small size, it is natural that the characteristics of the expanded pearlite required for paperboard is not lost.

In general, paper may be classified into high-quality paper such as copy paper, plain paper such as wrapping paper, cardboard such as box, etc., and double board (Paper Board) usually has a thickness of 0.1 mm, usually 0.3 mm or more, It is formed to be 100 g / m 2 or more, and relatively hard and tough paper is called cardboard. The kinds include manila cardboard, white cardboard, yellow cardboard, colored cardboard, and corrugated cardboard. Such cardboard is generally used as a thick paper cardboard can be used as a drawing paper, calendar, advertising paper, the cover of the book, the thick cover of the writing notes, etc., one side or both sides of the functional paper for coating or printing is integrally bonded. Can be. In addition, in the case of a cardboard, a decorative paper plate, egg plate, etc., which requires a certain thickness, a disc or liner disc including corrugated board, crushed wood pulp or recycled paper may be provided in the middle, and liner paper may be integrally attached to the outer surface. In order to have a certain thickness of the corrugated plate, disc, liner disc, etc., the voids need a large and light material, and the liner paper on the outer surface should have an even surface for printing and coating.

In addition, it is manufactured in various forms such as printing performance, waterproof performance, coating performance, etc. in addition to these. As such, when the expanded pearlite is manufactured to include various types and types of paper cardboard, the characteristics of the paper cardboard become more excellent.

That is, when the base paper is expanded to include expanded pearlite of about 2 to 100 μm and its maximum size is 100 μm or less, it can be provided with light and thick base paper. In addition, when the liner paper is provided to include expanded pearlite pulverized to about 2 ~ 30 ㎛ small, because the expanded pearlite of the fine particles are included, it can be provided with a paper cardboard excellent in coating and printing performance with excellent absorption performance of the expanded pearlite. It is.

Paper cardboard using the expanded pearlite according to the present invention, including the expanded pearlite in the beating together with the pulp during the manufacturing process can be provided by producing paper. Thus, the paper sheet is dried to produce paperboard, which is completed, and the composition is provided with a pearlite paper 10 such that the composition contains 10 to 30 parts by weight of expanded pearlite and 2 to 10 parts by weight of water with respect to 70 to 90 parts by weight of pulp. Can be. When the pearlite is contained in 10 parts by weight or less, the pearlite properties are insignificant, and when the pearlite is administered in an amount of 30 parts by weight or more, the pearlite is excessively contained, which makes it difficult to exhibit the characteristics of paperboard. The pearlite base 10 may further include 10 to 20 parts by weight of talc.

Talc is a monoclinic mineral and is also called talc. Magnesium clay mineral that forms a platy or fibrous aggregate. It is a layered mineral hardening 1.0, specific gravity 2.6 ~ 2.8. Pure is white and pearlescent, one of the softest minerals. Use white powder with fine powder. Therefore, when the talc is added, the quality of the paper is improved, the smoother, the whiter the outer surface of the paperboard is formed evenly. If the amount of the talc is less than 10 parts by weight, its effect is insignificant, and if it is more than 20 parts by weight, the dosage is too large for the effect.

In the case of manufacturing a paperboard made of only such a pearlite paper, the surface of the paperboard should have an even surface, so that the expanded pearlite can be used as fine as about 2 to 30 µm. However, when the liner paper is included on the outer surface, the paper can be made of paperboard having a light and thick liner paper using expanded pearlite of about 10 ~ 100 ㎛.

In other words, if you want to produce thin paper cardboard, it is preferable to use a fine material of about 2 to 30 μm, such as a paper sheet made of perlite raw paper, and in order to make a thick paper cardboard, but to lighten it as a whole, there are relatively many voids. It is preferable to prepare the pearlite base paper 10 using expanded pearlite having a medium size of 50 to 100 μm. Of course, when not particularly limited, expanded pearlite having a large size particle of about 30 to 60 μm or more may be used. Even when using the expanded pearlite of such a large size because the porosity is large, the weight of the manufactured paperboard has the advantage in use because it has excellent printing performance without being heavy as compared with the prior art.

In addition, the liner 15 may be formed by including pearlite together. That is, the liner 15 includes 50 to 90 parts by weight of expanded pearlite, preferably 70 to 80 parts by weight, and 10 to 30 parts by weight of a liner additive including any one or more components of starch, clay, and calcium carbonate. , Preferably it may be made to include 10 to 15 parts by weight. Of course, since the liner paper 15 forms the outer surface of the paperboard, the surface should be fine and smooth. Therefore, it is preferable to use a fine pearlite (especially expanded pearlite) of 2 to 30 μm, preferably 2 to 15 μm. . In particular, since most of the paperboard is located in the middle of the base paper to form a thickness, the liner paper is a thin thickness, it is preferable to use a pearlite of fine particle size. Thus, the surface of the paper cardboard is fine and smooth, and the white cardboard with talc (talc) is high, and the printing performance is also good.

When the pearlite is contained in an amount of 50 parts by weight or less, the pearlite property is insignificant, and when the pearlite is administered in an amount of 90 parts by weight or more, the pearlite is excessively contained, which makes it difficult to exhibit the characteristics of paperboard. In addition, when the liner additive is administered in an amount of 10 parts by weight or less, the binding properties are insignificant, and when included in 30 parts by weight or more, it is difficult to show the properties of the paperboard.

Furthermore, the paperboard containing the pearlite may be provided so as to be included only in the liner paper 15. That is, the liner paper 15 is formed on one side or both sides of the pearlite base paper 10 including the pulp, and the liner 15 may include expanded pearlite.

In addition to 70 to 80 parts by weight of expanded perlite, it may comprise 10 to 15 parts by weight of a liner additive containing any one or more components of starch, clay and calcium carbonate, further comprises 10 to 20 parts by weight of talc (Talc) It may be provided by.

Looking briefly with respect to the manufacturing method of paper cardboard using expanded pearlite according to the present invention provided as described above.

First of all, the manufacturing process of the paperboard (B), which is generally provided with a liner paper 15 including expanded pearlite, is prepared as a paper sheet 20, which is generally manufactured. .

That is, as shown in Fig. 4 and 5, the pulp raw material is put into the beating machine 31, and the pulp beating step (S011) is performed.

In addition, a sizing agent, a filler, and the like are added to the beater 31 to be beaten, and a papermaking manufacturing step S012 of manufacturing a paper base 20 using paper machine 32 using the beaten pulp is performed. do.

After the liner paper comprising 10 to 15 parts by weight of a liner additive containing any one or more components of 70 to 80 parts by weight, starch, clay and calcium carbonate of 2 to 30 ㎛ size on one or both sides of the base paper 20 Proceed to the liner forming step (S013) to be formed (15). In particular, the pearlite is expanded perlite (Expanded Perlite) it is preferable to use the size of the small size of about 2 ~ 30 ㎛.

In this way, the liner paper 15 is dried in a state where the liner paper 15 is formed in this way to complete the manufacturing step (S014) to complete the manufacture of paperboard (B) is completed.

Thus, during the manufacturing process of the paper cardboard (B) containing expanded pearlite, during the production of the base paper 20, as an additive added in the process of beating into the beating machine 31 together with the pulp, a cooking agent, Bleaching agent, sizing agent, surface lipid enhancer, strength enhancer, yield / freeze enhancer, antifoaming agent, etc. are administered with various kinds of additives.

As an example of specific components of such additives, the cooking agent may include sodium hydroxide, sodium carbonate, sodium sulfite, sodium sulfide, methanol, ethanol, phenol and the like. In addition, the bleach may include chlorine, chlorine dioxide, hydrogen peroxide, oxygen, etc., and the sizing agent may be rosin, reinforced rosin, etc., and the neutral sizing agent may be AKD (Alkyl Ketene Dimer) or ASA (Alkyl Succinic Anhydrid). Etc. The surface sizing agent for papermaking may include petroleum resin, alkyd resin, styrene acrylic resin, acrylic resin, starch, oxide starch, modified starch, and the like.

In addition, the surface lipid enhancers included in the paperboard manufacturing process may include starch, oxidized starch, modified starch, PVA, and the like, and as a dry strength enhancer, starch, oxidized starch, modified starch, PVA, polyacrylamide, etc. The wet strength enhancer may include urea resins, melamine resins, polyethylene imides, epoxidized polyamides, and the like. In addition, the yield-improving agent may include aluminum sulfate, polyacrylamide, polyethylene oxide, and the like, and the antifoaming agent may include higher alcohol, silicone, polyethylene oxide, and the like.

And according to another embodiment of the production of paperboard using expanded pearlite according to the present invention, the paperboard (A) to be prepared by administering to the confessionator 31 beating the pulp, including the expanded pearlite with an additive together with the pulp Can be.

That is, as shown in Figures 1 to 3, by carrying out the pulp beating step (S021) to put the paper plate support material containing 70 to 90 parts by weight of pulp together with 80 to 99 parts by weight of water into the confession machine 31, In this step, the addition of an additive including expanded pearlite proceeds.

In addition to the beaten pulp may be provided to the pulp fibers to be coated with a size agent. In addition, such a size agent may be prepared so that the size agent is coated on both sides of the paper in a state made of paper. First, the sizing step of the sizing step, the sizing step (S022) to put the sizing agent comprising any one or more of rosin, Alum, AKD and ASA so that the sizing agent is coated on the surface of the pulp fibers Proceed. Of course, additives as in the first manufacturing method may be added together.

In addition, an additive injection for beating by adding an additive comprising 10 to 15 parts by weight of expanded pearlite having a size of 2 to 100 μm, preferably 10 to 60 μm, with respect to 70 to 90 parts by weight of pulp 31 Step S023 may be performed together.

Then, using the pulp fibers in the beater 31, the papermaking process (S024) for producing paper using the papermaking machine 32 is carried out, and the papermaking, which is the wetland that has undergone the papermaking process, is dried and manufactured. Proceed to the complete step (S025) to complete the manufacture of the paperboard (A).

Furthermore, the coating layer may be further formed on one or both sides of the paperboard. That is, including a paperboard made of only a base containing expanded pearlite, a paperboard to be provided with a liner paper containing a pearlite expanded to the outer surface of the general base paper, and a pearlite expanded to one or both sides of the base paper including the expanded pearlite Paper cardboard such as paper cardboard to be provided with a liner paper may be applied.

Of course, such a coating layer may be provided as a general coating agent, it may be provided to include expanded pearlite. That is, the coating layer may include 70 to 80 parts by weight of pearlite, and 10 to 15 parts by weight of a coating additive including any one or more components of starch, clay, and calcium carbonate, and the pearlite may be provided with expanded pearlite. .

Looking at the manufacturing process of the paper carton using the expanded pearlite according to the present invention prepared as described above in detail as an embodiment as follows.

Paper cardboard is generally made from pulp fibers of synthetic fibers made by mechanically or chemically treating pulp fibers of wood or plants. The process for producing paperboard from pulp fibers made of such natural fibers, synthetic fibers or recycled pulp recycled paper is largely divided into 1) beating, 2) sizing, 3) fillers and drugs. Additives such as dyes, 4) refining and selection, 5) papermaking, and 6) finishing. When liner paper is provided, liner paper may be provided together on one or both sides of the paper, and recycled paper, paper, and the like may be provided together with natural fibers to be used as a paper material of paper.

Moreover, it is natural that some or all of 2) sizing process, 3) additive addition process, such as filler, medicine, dye, etc., kind of additive component, etc. may be appropriately modified and selected according to a kind of cardboard, a use, etc.

1) Beating step.

: Pulp is not suitable for making paper cartons, so it is necessary to dissolve the pulp in water using a pulper machine to make the required paper. The machine used here is called a beater 31, and the beater 31 colloidally cuts too long fibers properly, slit horizontally, or presses to crush.

And the confession machine 31 is to be beaten the pulp fibers in the water while rotating by mounting a rotating roller made of metal or stone with a lot of teeth in the tank as used in general paper production, The pulp fibers pass through the mesh between (i) and the teeth of the other rollers in the tank.

2) sizing step.

: Papermaking produced using only pulp fibers has absorbent properties and causes a problem of smearing when writing and printing.

Therefore, by mixing the water-resistant colloidal material in the pulp, it is necessary to fill the gaps between the surfaces of the fibers and the fibers to prevent the ink from penetrating and diffusing. This operation is called sizing, and the substance to be added is called a sizing agent.

This sizing method is a method of coating the individual fiber surface by adding a sizing agent to the pulp fibers in the blast furnace together with the beating operation, which is called engine sizing. And it is called surface sizing or top sizing by sizing agent after papermaking with paper from confession.

And you can do double sizing in combination.

As such an engine sizing agent, rosin may be used, and gelatin may be used for surface sizing. In addition, other AKD, ASA, petroleum resin, alkyd resin, styrene, acrylic resin, starch, latex, viscose and the like can be used together.

3) Additives such as fillers and chemicals and dyes.

In general, additives such as mineral white powder, etc. are added to the pulp in the blast furnace in order to give some opacity to the paper and to give the surface a smooth and suitable property for printing. Among these additives, fillers or fillers may be added. Such fillers may include natural acids such as clay, talc, gypsum, chalk, and artificial materials such as barium persulfate and carbonate.

In particular, in the present invention, such a filler may include expanded perlite, which includes 10 to 15 parts by weight of expanded perlite with respect to 70 to 90 parts by weight of pulp. Such expanded pearlite may be ground to a size of 2 to 100 μm or more. Therefore, in addition to the characteristics such as opacity and surface smoothing by the expanded pearlite is to be provided to improve the material properties, such as thickening the thickness of the cardboard. In other words, the thickness of the paperboard is thickened, the overall weight is lightened, the whiteness of the paperboard is good, and the outer surface has a lot of pores, so it has the advantage of absorbing the printing ink during printing and showing a good printing state.

In addition, additives that may be added may be administered together in various kinds of additives, such as a cooking agent, a bleaching agent, a size agent, a surface lipid enhancer, an intelligence enhancer, a yield / filament enhancer, and an antifoaming agent.

Examples of specific components of such additives include sodium hydroxide, sodium carbonate, sodium sulfite, sodium sulfide, methanol, ethanol, phenol, chlorine, chlorine dioxide, hydrogen peroxide, oxygen, rosin, fortified rosin, Alkyl Ketene Dimer (AKD), ASA (Alkyl Succinic Anhydrid), petroleum resin, alkyd resin, styrene acrylic resin, acrylic resin, starch, oxidized starch, modified starch, PVA, urea resin, melamine resin, polyethylene imide, epoxidized polyamide, aluminum sulfate, polyacrylamide , Polyethylene oxide, higher alcohol, silicone and the like can be included.

And dyes and pigments can be added as a colorant in order to produce the required color. These pigments have the advantage of lowering the production cost by multiplying the color and adding the amount of paperboard. However, the color is not diverse, the use is limited, the dyeing power is weak, and the amount of addition is large. Since there are disadvantages such as lowering the strength of paperboard, dyes may be widely used as colorants. The colorant may be used in the manufacture of colored paper as well as in the production of white paper to remove the yellow group and a small amount of blue dye to make the paper more white.

4) refining and selection phase.

: After finishing the above process and coming out from confession, it is called combinatorial protein or 'seed'. Since the raw material still contains less loose or coarse and larger fibers, and contains various foreign matters, the finishing beating is performed before the transfer to the paper machine to even out and sort the fibers. This finishing confession process is called correction (精 整), the Jordan equation is used in the corrector. In the final stage of correction, a device that filters foreign matter such as a sieve is called a screen. Once again, the raw material that is beaten in Jordan enters the mixing tank, where it is mixed with the raw material from several other blast furnaces, and the concentration is adjusted uniformly through the concentration controller so that the thickness of the paper layer is uniform. Through it, it can be a feedstock and can be transferred from the chute to the paper machine.

5) Grassland stage.

: After the above steps, the papermaking machine (pearlite paper 10) is produced from the beaten pulp fibers using the paper machine 32. There are many types of such paper machines (parer machine 32), but the important part is a wire part to form a strata (wetland), a press part to compress and dehydrate the strata, It may be configured as a dryer part for drying this.

In other words, the gold mesh part is made of a long net of endless shape, which is called a long mesh type paper machine, or a Fourdrier machine named after the original maker, and is made of a large cylindrical shape. It is called a cylinder mahcine. The ring network type is simpler in structure than the long mesh type, and is mainly used to produce paper, cardboard, mechanically irritated paper, and polarized paper. The papermaking capacity is determined by the gold width and the papermaking speed. In describing the process of grassland, when the feedstock (adjustable raw material) in the transport box enters the paper machine and is sprayed on the wire mesh, the suction filtration occurs and forms the strata, and then leaves the gold network and is placed on the blanket.

The wetland on the blanket is compressed and dewatered as it passes between two or three pairs of successive rolls and enters the drying section again. The drying unit is equipped with steam-heated drying cylinders in parallel, and the wetland from the crimp is dried by riding an endless blanket between the cylinders. The temperature of the drying cylinder is 60 ~ 70 ℃ in the first cylinder of the front, and gradually increases toward the back. Some paper machines are equipped with only one large drying cylinder, which is called a Yankee machine. Dandy rolls are also installed near the ends of the gold mesh, which gently presses the layers above the gold mesh to make the ground even or to serve as patterns. And at this time, the water from the paper due to the dehydration action of the gold mesh is called white water (白水) because it looks white because fine fibers are mixed.

6) Liner and Finished.

: Dried paper cardboard may be provided with liner paper 15 on one surface or both surfaces of the pearlite paper 10 as needed. Of course, it is also possible to manufacture paperboard made of only paper. However, it is preferable to include the liner paper 15 in order to manufacture paper cardboard according to the use and type thereof.

The liner 15 may be provided to include expanded pearlite. The expanded pearlite pulverized to a size of 2 to 30 ㎛, preferably 2 to 15 ㎛ can be used, and with respect to 70 to 80 parts by weight of such expanded pearlite, 10 to 15 parts by weight of a liner additive, starch, clay (Clay), calcium carbonate (CaCo3) and the like may be selected and included together.

Furthermore, in the state where the liner paper 15 is provided on the pearlite base paper 10, a coating layer may be further provided on the outer surface. The coating agent forming the coating layer may be provided to include expanded pearlite of about 2 to 10 ㎛. In addition, AKD, ASA, petroleum resin, alkyd resin, styrene, acrylic resin, latex, viscose, and the like, which are generally known as coating additives, may be used together.

In addition, a process of glossing through a calendar may be added. After the process of winding the reel (reel) to complete the manufacture of the paper. You can also pass the rolled paper back through the supercalender for a strong luster. The rolled paper (winder) thus wound can be cut, packed and transported to the required width with a cutter, printed for printing with a rotary press, or made into sheets of constant dimensions and sold on a yearly basis.

Paperboard using the expanded pearlite according to the present invention manufactured as described above was an example that the liner paper 15 is provided on both sides or one surface of the pearlite paper 10, and also the beating process during the process of making the pearlite paper 10 Expanded Perlite is included as an additive in the liner, and also expanded liner (Expanded Perlite) is also included in the liner paper 15 formed on both sides or one side of the pearlite base paper 10 made from papermaking. . The paper cardboard according to the present invention, which is thus formed, is light in thickness while maintaining its thickness, the outer surface is high in whiteness, and has good printing characteristics, so that printing ink is well absorbed even when printing in a printer, copier, web press, etc. Since it is expressed, there is an advantage of not having to increase the preheating temperature during printing.

Of course, in the exemplary embodiment described above, both the pearlite base paper 10 and the liner paper 15 are formed to include expanded pearlite, but the present invention is not limited thereto. Naturally, it may be included in the composition.

Furthermore, the pearlite base 10 and the liner 15 have been shown to include pearlite, using the expanded pearlite expanded by heating the pearlite as an example, but using the unexpanded pearlite, as in the above various embodiments It is also natural that paper can be produced.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art without departing from the spirit and scope of the invention described in the claims below In the present invention can be carried out by various modifications or variations.

The present invention provided as described above is provided with the expanded pearlite together with the pulp in the manufacture of paper cardboard, it is to be composed, even if the manufactured paper cardboard is formed thick, there is an effect that is suitable for use as a cardboard.

In addition, due to the large number of pores of the expanded pearlite, the printing performance is excellent, and the printing of the outer surface of the paperboard can reduce power consumption and wear of parts, etc., and the printing state is also in good condition.

1 is a cross-sectional view of a paper cardboard structure of one embodiment using the present invention pearlite.

Figure 2 is a flow chart of a method of manufacturing an embodiment of a paper cardboard using the present invention pearlite.

Figure 3 is a schematic illustration showing a paperboard manufacturing process using the present invention pearlite.

Figure 4 is a cross-sectional view of a paperboard structure of another embodiment using the present invention pearlite.

Figure 5 is a flow chart of a manufacturing method of another embodiment of a paperboard using the present invention pearlite.

<Explanation of symbols for main parts of the drawings>

A: paper cardboard 10: original paper

15: liner paper

31: confession 32: paper machine

Claims (7)

delete delete delete delete delete In the manufacturing method of paper cardboard using expanded pearlite prepared by adding an additive including expanded pearlite and talc with a paper raw material, Pulp beating step (S021) to put the paper raw material containing 70 to 90 parts by weight of pulp together with 80 to 99 parts by weight of water in the beating device (31); A sizing step (S022) in which a sizing agent is coated on the surface of the pulp fibers by adding a sizing agent in addition to the beaten pulp; Additive injection step (S023) to put the additives consisting of 10 to 15 parts by weight of expanded pearlite and 10 to 20 parts by weight of talc with respect to 70 ~ 90 parts by weight of pulp 70 to 90 parts by weight of the beater 31 ; A paper making step (S024) of manufacturing paper using the paper machine 32 by using the pulp fibers in the beater 31 to be beaten; It comprises a complete step (S025) to complete the manufacture by drying the wetland after the papermaking step, The sizing agent of the sizing step (S022) is provided containing any one or more of rosin, reinforced rosin, petroleum resin, alkyd resin, styrene acrylic resin, acrylic resin, starch, oxide starch, modified starch, Additives of the additive injection step (S023) is provided, including a cooking agent, bleaching agent, surface lipid enhancer, strength enhancer, yield / freeness enhancer, antifoaming agent, The cooking agent is provided containing any one or more of sodium hydroxide, sodium carbonate, sodium sulfite, sodium sulfide, methanol, ethanol, phenol, The bleach is provided containing any one or more of chlorine, chlorine dioxide, hydrogen peroxide, oxygen, The surface lipid enhancer is provided containing any one or more of starch, oxidized starch, modified starch, FV, The intelligence enhancer is provided containing any one or more of starch, oxidized starch, modified starch, FV, polyacrylamide, urea resin, melamine resin, polyethylene imide, epoxidized polyamide, The yield and the water-solubility improving agent is provided containing any one or more of aluminum sulfate, polyacrylamide, polyethylene oxide, The antifoaming agent is a method of manufacturing a paperboard using expanded pearlite, characterized in that any one or more of higher alcohol, silicone, polyethylene oxide is included. In the paper cardboard produced by the method of manufacturing a paper cardboard using the expanded pearlite of claim 6, The paper cardboard is 10 to 15 parts by weight of expanded pearlite having a size of 2 to 100 ㎛, 2 to 10 parts by weight of water and 10 to 20 parts by weight of talc, containing 70 to 90 parts by weight of pulp. Paperboard.