TWI245825B - Corrugated medium for fiberboard and method of manufacturing the same - Google Patents

Abstract

An improved method for making a corrugated medium for fiberboard is presented. The proposed method is capable of avoiding cracking, breaking or chipping of the fiberboard. When the board is with a corrugating roll, preventing the wearing of the corrugating roll, reducing electric power consumption and noise level, effectively coating wax on the fiberboard evenly, without contaminating the corrugating roll. It is a method for making a corrugated medium for fiberboard coated with wax by a paper machine provided with a plurality of groups of driers, wherein a dispersion of wax is sprayed (S) on the surface of drier C8, the wax on the surface of drier C8 being heated to melt, and the molten wax is transferred from the surface of drier C8 to the corrugated medium 100 by pressing the surface of drier C8 against the corrugated medium 100.

Description

1245825 V. Description of the invention (1) [Detailed description of the invention] [Technical field to which the invention belongs] The present invention relates to a core base paper for corrugated paper and a method for manufacturing the same. In particular, it relates to a method for forming corrugations using a corrugated roller. Corrugated core paper for corrugated paper without cracking of the corrugation or breaking and breaking of the corrugation, and can prevent the abrasion of the corrugated roller, and reduce the consumption of driving power and noise, and a manufacturing method thereof. [Conventional technology] Generally, corrugated paper is cut or bent from a flat core-shaped base paper, and then assembled to complete it. The corrugated base paper for corrugated paper is formed by a single-sided corrugator (sing 1 efacer) of a corrugating machine (c 〇rrugat 〇r) to form corrugations, and then bonded with a liner (1 iner) to form a single-sided corrugated board. (With a core lining attached), and then put a cardboard back layer (back 1 iner) to form corrugated paper. The conventional forming steps of the single-sided corrugated board of this single-sided corrugating machine are shown in FIG. That is, the core base paper 100 is first formed by corrugating a pair of corrugated rollers, that is, the nips of the upper corrugated roller 101 and the lower corrugated roller 102 are crimped, and becomes the core 103. Then, use the sizing roller 104 to apply a paste on the top of the core 103, and crimp the lining 1 06 to the top between the lower roller 10 and the crimping roller 1 0 5 and stick. Combined to form single-sided corrugated cardboard 1 107. However, generally speaking, the core base paper is subjected to strong forces such as pulling, bending, and shearing from a pair of corrugated rollers when forming corrugations.

313886.ptd Page 6 1245825 V. Description of the invention (2) Grain will rupture (corrugation break) or the top of corrugation will break (corrugation break). In more serious cases, the core base paper is completely broken. In addition, the corrugated roller is often subjected to frictional force with the core base paper, so that it wears out, so that the consumption of driving power is increased or the noise is increased. Therefore, the grinding cycle of the corrugated drum is shortened, and the start-up rate is reduced. In addition, from the viewpoint of recycling, etc., most of SMIC's base paper is currently recycled paper using old paper and the like as raw materials. As a result, most of the core paper still has foreign matter such as clay used in coated paper and the like. In addition, in order to match the so-called low-grade old paper such as magazine old paper, the core paper with reduced paper strength is also increasing. . Therefore, when the above corrugation molding is performed, corrugation cracking, corrugation breakage, breakage, etc. are more likely to occur, and the corrugated roller wears faster due to ash-containing components such as clay in the core base paper. Under such circumstances, a method of directly applying wax (lubricant) to the core base paper has been developed as a method for enhancing paper strength and reducing friction with a corrugated roller. For example, there is a method of sandwiching the core base paper with a pair of upper and lower solid wax holders, and coating the solid wax on both the front and back sides of the core base paper while crimping one side (see Japanese Patent Laid-Open No. 4-4 7 9 3 0 Bulletin). However, because too much wax adheres to the core paper, the wax is transferred from the core paper to the corrugated roller in large quantities, and then carbonized on the surface of the corrugated roller, which is usually heated to about 160 to 190 ° C. Therefore, black lines will adhere to the corrugated core, or stains will appear.

313886.ptd Page 7 1245825 V. Description of the invention (3) Dyeing lining, etc., so as to reduce the quality of the core base paper. In addition, there is a disadvantage that the carbonized wax blocks the pores for vacuum provided on the surface of the corrugated drum. Therefore, a method has been developed in which a wax in the form of a solution or dispersion is sprayed on the core base paper, thereby applying a wax. For example, Japanese Unexamined Patent Publication No. 1 1-1 1 7 1 8 8 discloses a non-dried state with a moisture content of 10 to 30% in the papermaking step (usually, the dried state is less than 10%). A method of manufacturing core paper for corrugated paper by directly spraying lubricant on the base paper with a lubricant in a dryer. This method distributes moisture from the inside of the base paper when the moisture in the base paper dries, so that the lubricant does not penetrate into the inside of the base paper and remains on the surface. However, this method uses straight core paper that travels at high speeds. There will be air flow around it, so if the lubricant is sprayed directly on the core base paper, the lubricant will fly fiercely. Therefore, the inside of the papermaking machine or the surrounding equipment will be seriously polluted. Moreover, when the papermaking machine is temporarily stopped and the moisture state of the core base paper is changed, it is easy to affect the adhesion state of the wax, and uneven coating may occur. As described above, this method does not necessarily allow uniform application of the lubricant, and therefore has the disadvantage of poor coating efficiency. [Problems to be Solved by the Invention] The present invention has been developed in view of the foregoing circumstances and has been made in order to overcome the problems described above.

313886.ptd Page 8 1245825 V. Description of the invention (4) That is, the purpose of the present invention is to provide a corrugated core for corrugated paper that does not cause corrugated rupture or corrugated rupture or break when corrugated rolls are used to form corrugations. Base paper and its manufacturing method. Further, a core paper and a method for manufacturing the same are provided which can prevent the abrasion of the corrugated roller and reduce the consumption of driving power and noise. A method for manufacturing a core base paper that can uniformly and effectively apply wax to core base paper without contaminating equipment such as a papermaking machine is also provided. [Means for solving the problem] Therefore, the inventor of this case conducted detailed research on the background of this problem and found that instead of directly spraying wax on the core base paper, spraying the dispersion solution of rhenium on the heated dryer to disperse it The butterfly in the liquid is oiled, or it is sprayed on the roller in contact with the paper surface, so that the wax is indirectly transferred to the core base paper, so that the appropriate amount of wax can be uniform and effective, and it will not pollute the inside or periphery of the paper machine The surface of the core base paper was coated by a machine or the like; and when the wax was transferred from a dryer or a roller, the core base paper was relatively easily transferred to the surface in a dry state as much as possible, and the present invention was completed based on this knowledge. That is, the core base paper for corrugated paper (1) of the present invention is a core base paper for corrugated paper formed by coating wax on the surface and inside, and is characterized in that the coating amount relative to the core base paper is from 0.1 to 1 10 mg / m2. Moreover, in the core base paper (2) for the corrugated paper of the present invention, the moisture content of the core base paper when the wax is coated is less than 10%. In the core base paper (3) for corrugated paper of the present invention, the wax is a dispersion liquid in which a wax is sprayed onto a final dryer of a papermaking machine, and the wax in the dispersion is transferred and applied to the core base paper.

313886.ptd Page 9 1245825 V. Description of the invention (5) 'Furthermore, in the core base paper (4) for corrugated paper of the present invention, the aforementioned wax is a dispersion liquid in which a wax is sprayed on a paper roll of a papermaking machine, and the dispersion is made. The wax in the liquid is transferred and applied to the core base paper. Furthermore, the manufacturing method (5) of the core paper for corrugated paper of the present invention is a method for manufacturing a core paper for corrugated paper coated with wax using a papermaking machine having a plurality of dryers, which is characterized in that: The butterfly dispersion was sprayed to make the butterfly oily on the surface of the heated dryer, and the oiled wax was transferred from the surface of the dryer to the surface of the core base paper. Furthermore, in the method (6) for producing a core base paper for corrugated paper according to the present invention, the aforementioned dryer is a dryer belonging to the final group of papermaking machines. Furthermore, in the method (7) of manufacturing a core base paper for corrugated paper according to the present invention, the aforementioned dryer is a final dryer in an upper stage or a lower stage among the dryers belonging to the final group. Furthermore, in the method (8) for producing a core base paper for corrugated paper according to the present invention, the melting point of the wax is lower than the surface temperature of the dryer. Furthermore, the method (9) for manufacturing a core base paper for corrugated paper of the present invention is a method for manufacturing a core base paper for corrugated paper coated with wax using a papermaking machine having a paper roll, which is characterized in that: spraying on the surface of the paper roll Sprinkle the wax dispersion and transfer the wax from the surface of the paper roll to the surface of the core base paper. Furthermore, in the method (10) of manufacturing a core base paper for corrugated paper according to the present invention, the foregoing can be applied in a manner that the coating amount to the core base paper is from 0.1 to 10 mg / m2. In addition, the manufacturing method (1 1) of the core base paper for corrugated paper of the present invention is

313S86.ptd Page 10 1245825 5. In the description of the invention (6), the moisture content of the aforementioned core paper when spraying the dispersion of wax is less than 10%. Furthermore, in the method (1 2) for manufacturing core base paper for corrugated paper of the present invention, the wax is transferred to the surface of the core base paper, and then the core base paper is wound, thereby transferring a part of the wax to the core base paper. inside. Furthermore, in the method (1 3) for producing a core base paper for corrugated paper of the present invention, the aforementioned wax is used alone or in combination of paraffin wax, polyethylene wax, or microcrystalline wax. Furthermore, in the method (1 4) for producing a core base paper for corrugated paper of the present invention, the dispersion liquid further contains a solid lubricant or a metal soap. Furthermore, in the method (15) for producing a core base paper for corrugated paper of the present invention, the aforementioned dispersion liquid further contains oil. Furthermore, the manufacturing method (16) of the core base paper for corrugated paper of the present invention is a method for manufacturing a core base paper for corrugated paper coated with wax using a papermaking machine having a plurality of dryers, which is characterized in that: In the area where the moisture content of the core paper of the machine is less than 10%, and the surface of the heated dryer is sprayed with the dispersion, the fiber is oiled on the surface of the heated dryer, and the oiled The wax was transferred from the surface of the dryer to the surface of the core base paper, and was coated with a coating amount of 0.1 to 10 mg / m ^ relative to the core base paper. In addition, the manufacturing method (17) of the core base paper for corrugated paper of the present invention is a method for manufacturing a core base paper for corrugated paper coated with wax using a papermaking machine having a paper roll, which is characterized in that: Sprinkle the wax dispersion and transfer it to the surface of the core base paper with a moisture content of less than 10%

313886.ptd Page 11 1245825 V. Description of the invention (7) The surface is coated with a wax coating amount of 0.1 to 10 mg / m relative to the core base paper. The wax or wax dispersion liquid (18) of the present invention is a wax or wax dispersion liquid coated on a core base paper for corrugated paper, and is characterized in that it can be applied to the corrugated paper according to (3) or (4). Core paper. In addition, the wax or wax dispersion liquid (19) of the present invention is a wax or wax dispersion liquid used in a method for producing a core base paper for corrugated paper, and is characterized in that it can be used in (5) or (9) Manufacturing method of core base paper for corrugated paper. As long as the present invention meets this object, it is of course possible to adopt a configuration of a manufacturing method in which two or more selected from the above 1 to 4 and two or more selected from the 4 to 17 are combined. [Action] The present invention is applied on the surface and the inside of the dry core paper having a moisture content of less than 10% in a ratio of 0.1 to 10 m g / m. When the corrugated roller is used to corrugate the core paper coated with wax at such a ratio, the friction with the corrugated roller can be reduced, and a suitable amount of wax can be continuously supplied to the corrugated roller, so that the friction resistance of the corrugated roller itself becomes variable small. Such a core base paper is obtained by transferring the wax that has been oiled on the surface of the dryer to the surface of the dry core base paper with a moisture content of less than 10% when making paper. Or it can be obtained by transferring the paper roll to the surface of the same dry core base paper, and winding the core base paper directly on the roll at a high temperature.

313886.ptd Page 12 1245825 V. Description of the invention (8) The cylinder can transfer a part of the wax coated on the surface of the core base paper and coat it inside. [Embodiments of the invention] Hereinafter, preferred embodiments will be described and the present invention will be described with reference to the drawings. The core base paper of the present invention is a core base paper for corrugated paper which is formed by coating wax on its surface and inside, and is characterized in that the coating amount of the wax to the core base paper is 0.1 to 10 mg / m2. Actually, as described later, a spraying device is used to continuously spray the wax dispersion liquid to a dryer or a roll with a wax coating amount of 0.1 to 10 mg / m sodium. However, even if the dispersion is continuously sprayed as described above, waxes and the like are not accumulated on the surface of the dryer or the paper roll, and are not scraped off by a doctor blade. Therefore, it is known that a wax sprayed on a dryer or the like in an amount of 0.1 to 10 mg / m sodium can be efficiently transferred to the surface of the core base paper. The wax may be a paraffin wax, a polyethylene wax, a microcrystalline wax, or the like, and these may be used alone or in combination. When using corrugated rollers to corrugate the core base paper, it has the effect of significantly reducing the friction between the core base paper and the corrugated roller. 5 至 5mg / m2。 Here the coating amount of wax relative to the core base paper in the table is preferably 0.1 to 10mg / m% spoon range, more preferably 0.5 to 5mg / m2. If the coating amount is less than 0.1 m g / m 2, the effect of reducing friction may not be obtained. If it is more than 10 m g / m 2, the sample will be excessively transferred to the corrugated roller, so that the black portion becomes more.

313886.ptd Page 13 1245825 V. Explanation of the invention (9) The core base paper coated with wax on the surface and inside can prevent the core core paper's corrugation from rupturing or the corrugation from breaking and breaking when the corrugated cylinder is used to form corrugations. And can prevent the abrasion of the corrugated drum, reduce the consumption of driving power and noise. [Outline of papermaking machine] The core paper of the present invention is manufactured at the stage of the papermaking step, that is, the papermaking machine. First, a general papermaking machine will be described based on the drawings. FIG. 1 is a schematic diagram of a papermaking machine. The papermaking machine is composed of a pressurizing section A, a first group B of the dryer section, a final group C, and a drum section D (the first group and the dryer group other than the final group of the dryer section are omitted). The core base paper passes through the papermaking machine, but the core base paper 100, which first enters the pressurizing section A, is a fluid pulp containing a large amount of water, and is subjected to dehydration and pressure on the pressure rollers and felts. It is then sent to the dryer section and dried through dozens of dryers to become a core base paper. Generally, about 10 dryers form a dryer group, and about 3 to 5 dryer groups are continuous to form a dryer section. Furthermore, among the groups from the first group to the final group C, the dryers are arranged in an orderly manner up and down, and the upper canvas (B 1, C 9) and the lower canvas (B 2, C 1 0) are arranged. The components are crimped from above and below to each dryer. Canvas is a thin and strong cloth, for example, made of synthetic resin canvas.

313886.ptd page 14 I245825 (10), description of the invention and sandwiching the core base paper in the middle, and then crimping the core firmly to dryness, Λγ, 'and using the heat of the dryer to make the core base paper 1 00 The moisture evaporates. ^ In addition, each dryer has a heat source inside. Usually, the temperature is gradually increased from the first group to the final group C to set the temperature of each dryer. Specifically, the temperature setting is different depending on the papermaking speed (copier speed) of the core base paper 100. However, for example, when the papermaking speed is 600 to 700 in / min, the drying of the first group B is performed. The temperature of the machine is set to 80 to 100 ° C. Moreover, the final dryer of the final group C (here, the final dryer C 8 in the upper stage) is set to about 120 ° C, and the core base paper located in the region of the final dryer in the upper stage is generally in a so-called A dry state, that is, a state where the moisture content is less than 10%. Fig. 2 is a schematic view of a watch group and a drum section of a dryer section of a papermaking machine. In the final group C, as described above, the first to sixth dryers C 1, C 2, C 3, C 4, C 5, C 6, and the final dryer C 7 and the upper #, and finally The dryer C 8 is arranged alternately up and down, and the cloth C 9 and the lower canvas C 10 are crimped from above and below.

Moreover, each dryer was set to an appropriate temperature, and finally dryer d was heated to about 120 ° C in Binan. J After leaving the dryer section, the core paper 1 0 0 is immediately sent to the receiving section D, and is wound around the drum D4 ° in a hard shape through the paper rolls d 2 and D 3. Moreover, in the final dryer A moisture knife is set between C8 and Gundian D4

313886.ptd Page 15 1245825 V. Description of the invention (11) The device D 1 can constantly monitor the moisture content of the core base paper 100. At this stage, the core base paper 100 usually forms a drier state with a moisture content of about 7 to 8%. [Spraying process of dispersion liquid] The present invention sprays a dispersion liquid of wax on the surface of a dryer or a paper roll of a papermaking machine, and transfers the wax in the dispersion liquid to the surface of the core base paper, thereby coating the wax in the Core base paper. That is, instead of directly applying a dispersion liquid to the core base paper as in the past, wax is indirectly applied through a dryer or the like. Here, a case where a butterfly is applied through a dryer will be described first, and a method for transmitting a paper roll will be described later. In the case of applying wax through the dryer, the pests in the sprayed dispersion are first oiled on the surface of the heated dryer, and then the oiled pupae is transferred from the surface of the dryer to the surface of the core base paper. The transfer of wax from the dryer can be uniformly and effectively transferred when the core base paper is as dry as possible, so it is sprayed on the dryers that belong to the final group of papermaking machines. The core base paper is coated with wax in order to reduce the friction with the corrugated cylinder when the corrugation is formed by the single-sided corrugating machine of the corrugating forming machine. Therefore, it is not necessary to make the wax penetrate into the core base paper, and it is sufficient to coat the surface . That is, as long as the surface of the core base paper is coated with wax, if you think about the relationship between water and oil, it should be easy to understand that at this time, it is easier to make the dry state than the wet state in which the core base paper contains water. Sacrifice transfer. As mentioned above, as long as the core paper is in a dry state,

313886.ptd Page 16 1245825 V. Description of the invention (12) When the amount is less than 10%, the wax can be surely transferred from the dryer to the surface of the core base paper. In addition, the wax is oily and diffused on the surface of the heated dryer, so the wax can be evenly coated on the core paper. Furthermore, since the wax does not enter the inside of the core base paper, the wax can be effectively used. Under normal papermaking conditions, the core base paper passing through the paper machine is in the final group C of the dryer section, and the moisture content of the core base paper can be dried to less than 10%. Therefore, it is best in almost all areas of the final group C It forms a moisture content of less than 10%, and sprays a dispersion of wax on a heated dryer belonging to this final group to transfer and apply the wax to the core base paper. Especially in the final dryer, the core paper is dried to the moisture content of about 7 to 8% as described above, so it is better to spray here. In addition, since there is a clearance space around the final dryer, it is easy to install a device for spraying the dispersion liquid of wax, and it is also very good from the viewpoint of maintenance and the like. Moreover, as mentioned above, since the butterfly is concentratedly coated on the surface of the core base paper, it can be surely and efficiently transferred to the surface of the corrugated roller when corrugations are formed by the corrugated roller later. As a result, as described above, abrasion of the corrugated drum itself can be prevented. Figure 3 is an enlarged view of the vicinity of the final dryer (here, the final dryer is shown above). The core paper 1 0 0 is drawn into the final dryer C 8 and the canvas roller C 1 1

313886.ptd Page 17 1245825

The ground is crimped to the fifth and fifth invention description (13) of the final dryer C8 and the surface is forced by the upper canvas C9. Moreover, when the surface gradually moves, peeling will occur in the final dryer C8 (and, and in the canvas roller C1 2 and wound on the drum D4. The upper canvas C9) rotates at the same position from the final dryer C8 section on the other hand, The core paper 100 is not provided with the spray device S at the most. The spraying device S in contact with the final dryer C 8 may also be arranged behind the scraper T. In addition, a scraper is not necessarily required. Fig. 4 is a schematic diagram of a method for spraying a dispersion liquid. The frame S2 of the spraying device S is an Menggu and p-type spraying nozzles sl at intervals of lm. There are several movements with the same women's clothing. As long as the installation is specific, if the width of the final dryer C8 is 4 butterflies, if it is 5m, only 5 can be installed. Then, the frame S2 is moved back and forth, for example, at a speed of about 2 m / min, and the wax dispersion is sprayed toward the surface of the final dryer C8. At this time, due to the rotation of the final dryer C8, air flow is generated to some extent, but if the speed of the dispersion liquid in the spraying device (spraying nozzle) is sufficiently increased, the dispersion liquid can be prevented from flying up. Furthermore, as shown in FIG. 3, as long as the aforementioned scraper τ is provided in advance, the flying condition can be further suppressed. The above has been described for the case where the dispersion is sprayed toward the final dryer C8 of the upper stage, but for example, it is not intended to apply on the opposite side of the core base paper

Page 18 1245825 V. Description of the invention (14) In the case of wax distribution, of course, the dispersion can also be sprayed in the final dryer C 7 in the lower stage. When the dispersion is sprayed on a dryer other than the final dryer in the upper and lower stages, the spraying method shown in Fig. 3 or Fig. 4 can also be used for spraying in the same manner. [Butterfly Dispersion] Next, the wax dispersion used in the present invention will be described. This dispersion is a dispersion which is dispersed in water using a dispersant. As described later, various additives may be added as needed. As mentioned above, these waxes are preferably used alone or in combination, such as paraffin wax, polyethylene wax or microcrystalline wax. These can effectively reduce friction, and the melting point is lower than the surface temperature of the dryer (about 50 to 10 (TC)), so it will instantly oil on the surface of the dryer heated to about 120 ° C. In addition It is more effective if used in combination with solid lubricants or metal soaps. These solid lubricants or metal soaps are attached to the core base paper together with the above waxes, and then corrugated with a corrugated roller. The function of reducing friction with the corrugated drum. Examples of solid lubricants include molybdenum disulfide, tungsten disulfide, graphite fluoride, boron nitride, and silicon nitride. Among them, if the formation of molybdenum disulfide is about // m In the form of fine particles, the coefficient of friction is reduced (about 0.4), and the thermal and chemical properties are quite stable, so it is particularly widely used.

313886.ptd Page 19 1245825 V. Description of the invention (15) In addition 5 stearic acid soap is best used for metal soaps. In addition, it is best to use hexacolloid oil (mineral oil, silicone oil, synthetic oil) in the above dispersion. Λ vegetable oil, animal oil, etc.) as a release agent (release agent). When this oil is applied to the dryer, it will spread on the surface to form a film, and it can easily transfer insect pests or solid lubricants Λ metal soap from the surface of the dryer to the core base paper. Furthermore, 5 in the dispersion On the day, k may also contain other additives as appropriate. [The wax coating process is as described above. When the dispersion liquid is sprayed from the spraying device S to the surface of the dryer, the wax in the dispersion liquid will be oiled on the surface of the dryer and diffused on the surface, and the The surface is transferred and coated on the surface of the core base paper. The back core base paper is wound around the drum with a certain pressure. At this time, a part of the wax is transferred from the surface of the core base paper (that is, _, the side where the butterfly is transferred from the dryer) to the relative state by winding up, so it can also be coated on the inside of the core base paper. Part of the butterfly. When the core paper is corrugated, it has the function of preventing wear and tear on both sides of a pair of corrugated rollers. This is described in detail in accordance with FIG. 2 c) First, firstly, the butterfly in the sprayed dispersion is formed on the surface of the rotating final dryer C8 as a thin film. Spray there from the spraying device S When the dispersion liquid is sprayed, the water in the dispersion liquid will be emitted due to the heat of the final dryer C8, and the wax will be oiled due to dissolution and diffuse on the film.

313886.ptd Page 20 1245825 V. Description of the invention (16) Then, under the condition that the upper canvas C 9 is crimped, the core paper 1 0 0 and the final dryer C8 are moved while rotating with the same oil. The converted wax is transferred from the surface of the final dryer C8 to the surface of the core base paper 100, and the wax is coated on the core base paper 100. As described above, the core base paper 100 coated with 4 rats on the surface is separated from the final dryer C 8 at the position of the canvas roller C 1 2, and is wound up on the drum D 4 via the paper rolls D 2 and D 3 immediately. At this time, the core base paper 100 rolled up in the roller D4 still has residual heat, so the wax on the surface of the core base paper 100 is also partially transferred and adheres to the core base paper 100 in a relative state. This completes the step of applying the wax to the core base paper. Next, a method of applying a wax to a core base paper through a paper roll rather than a dryer will be described (see Fig. 2). In this method, a dispersion of wax is sprayed on the surface of a paper roll, and the wax in the dispersion is transferred from the surface of the roll to the surface of the core base paper. As described above, the same applies to the paper roll D 2 (D 3 and the like. The same applies hereinafter), and the core base paper is in a dry state with a moisture content of about 7 to 8%. That is, as described above, the state in which the wax is easily transferred to its surface is formed. Moreover, the core paper had a high temperature of about 70 ° C immediately after passing through the dryer section C. The paper roll D 2 itself is not heated, but will absorb heat from the core base paper and become the same temperature. Therefore, when the dispersion is sprayed on a paper roll, the wax will be oily or at least soft

313886.ptd Page 21 1245825 V. Description of the invention (17) It is the same as the case of the dryer, which can reliably, uniformly and effectively transfer the wax to the surface of the core base paper. In addition, in the case of this paper roll, a method of spraying the dispersion liquid, transferring a part of the wax to the inside by winding the core base paper, using a stone ballet in the wax, etc., adding a solid lubricant or oil to the dispersion liquid And so on are the same as in the case of the dryer. In addition, it is not limited to a paper roll, as long as it is a roller that can contact the core base paper when the core base paper is conveyed in the roller section D (refer to FIG. 1), for example, even a calender roller can be coated uniformly and effectively. . In the following, the results of experiments conducted on the core base paper in the method for manufacturing the core base paper of the present invention when the spraying state of the dispersion liquid is variously changed are shown by examples. The present invention is not limited to the following examples. The core base paper used in the experiment was produced under the following conditions. [Crafting conditions] Papermaking machine: Ultra-reformer (U 11 raf ommer: manufactured by Kobayashi Co., Ltd.) Papermaking name / Unit weight of common core: 160g / m2 Papermaking speed: 300m / minute or 600m / minute Paper width: 4m or 5m [Spraying conditions] Spraying location: the final dryer (see C8 in Figure 2) or paper roll (see D2 in Figure 2)

313886.ptd Page 22 1245825 V. Description of the invention (18) ^-Spraying method: In the case of a paper width of 4m, it is sprayed from 4 nozzles, and in the case of 5, it is sprayed with 5, 1 (^ 20cmV minutes (each (5, 5 or 10 cm V minutes in total) Sliding speed: 2m / minute Solid lubricant: Disulfide I mesh 1% by weight Metal soap: Stearic acid soap 1% by weight Oil: Silicone oil 1 〇wt% In addition, the melting point of rhenium used is below 70. [Example 1] A 10% by weight dispersion of microcrystalline wax 卄 25Cm3 / min was sprayed on the final dryer of the upper stage, and The coating amount of the wax of the medium paper based on a paper width of 5 m and a copy speed of 600 m / min was set to 0.8 mg / m2. ※ Calculation formula: (25 g / min X 〇.1) / ( 5mx 600m / min) = 0.8 mg / m2 (however, the specific gravity is assumed to be calculated in u / cm3, and the same method is used below) [Example 2] The final dryer in the upper stage is sprayed with each mixture The amount of paraffin wax and polyethylene can be 50 cm3 / min for a 10% by weight dispersion of 2 soils, and it will be compared with the medium produced at 5 m with a paper speed of 600 m / min. The coating amount of the base paper wax was set to 1.7 mg / m 2. [Example 3] The final dryer in the upper stage was sprayed with 50 cm3 / minute of a 10% by weight dispersion of mixed paraffin wax and microcrystalline cymbal 3 respectively. And compared with the wax of the core base paper manufactured under the conditions of paper width of 4m and speed of 300m / min.

313886.ptd Page 23 1245825 V. Description of the invention (19) The coating amount is set to 4.2 mg / m2. [Example 4] The final dryer on the upper stage was sprayed with 100 cm3 / minute of microcrystalline wax, and the coating amount of the butterfly on the core base paper manufactured with a paper width of 5 m and conditions was set to [Example 5]. The paper roll was sprayed with a 20% by weight dispersion liquid 1 of paraffin, and the coating amount was set to 3.3 mg / m2 with respect to the butterfly of β-core base paper with a paper width of 5 m and a copy speed of 600 m / min. [Comparative Example 1] (Example of excessive soil coating amount) The final dryer on the upper stage was sprayed with 100 cm V minutes of microcrystalline wax, and compared with a core paper made of paper with a width of 5 m and a paper k The coating amount of the soil was set as [Comparative Example 2] (an example in which the coating amount of the soil was too small). The final dryer on the upper stage was sprayed with 5 cmV of microcrystalline wax for 5 minutes. Setting of coating amount of wax [Comparative Example 3] (Example of excessive coating amount of wax) A paper roll was sprayed with a 40% by weight dispersion liquid of paraffin wax and the paper was coated with a paper width of 5 m and a copy speed of 60 0 μm / minute. The coating amount of the wax was set to 13.3 mg / m2. [Comparative Example 4] (Example in which the amount of applied soil is too small) The 25.5% by weight dispersion liquid meter was set at 8.3 mg / m2 at a speed of 600 m / min. ‘50 cm 3 / min, and the 50% by weight disperse meter manufactured under the conditions of J was 16.7 mg / m 2 at a transfer speed of 600 m / min. The bar with a speed of 600 m / min at a 5 wt% dispersion solution was 0.08 mg / m2. 1 0 0 c m V minutes, and 5 c m V minutes manufactured under conditions, and

313886.ptd A 5 wt% dispersion of paraffin sprayed on a paper roll will be compared to {

Page 24 1245825 V. Description of the invention (20) The coating amount of the base paper butterfly is set to 0.8 m g / m 2. [Comparative Example 5] [Ordinary manufacturing method (without wax)] Paper was made without spraying at all under conditions of a paper width of 5 m and a paper speed of 600 m / min, and a core base paper was obtained. [Friction Experiment] For the core base papers of Examples 1 to 4 and Comparative Examples 1 to 3, a measurement experiment of a friction coefficient (sliding start angle) was performed in accordance with the tilt method of JIS P8 1 4 7 and the respective measurement surfaces and each other The slide-out start angles of each other inside. The results of the first and fifth measurements are shown in Table 1 as the difference from the result of Comparative Example 5 (Comparative Example 5 is an experimental value).

313886.ptd Page 25 1245825 V. Description of the invention (21) [Table 1] Comparative example 5 Comparative example 4 Comparative example 3 Comparative example 2 Comparative example 1 Example 5 Example 4 Example 3 Example 2 Example 1 CJ1 ϋΐ cn cn cjy cn σ \ cn σ \ Paper width (n) 0) 〇〇α > ο ο ο) ο ο ο σ > ο ο σ > ο ο ο σ > ο ο σ > ο ο CO ο ο σ > ο ο σ > ο ο copy speed (m / min) 1 cn ο ο C71 Ο ο CJt ο »—1 Ο Ο cn ο cn to cn spraying amount (cn3 / minute) 1 CJ1 private ο cn αι ο to ο to CJ1 Η Ο Η- »Ο — ο Concentration (%) 1 ο ο 00 CO C0 ο ο 00 16.7 CO D0 00 CO CO Η- * ο 00 Coating amount (ig / n2) to h-4 · CJ1 1 ο CJ1 1 CO οι 1 ο cn 1 03 αι 1 C0 ο 1 Cl) CJ1 1 00 αι 1 Ca) 〇 1 to • CJ1 first surface-surface (degrees) Η · * CD cn 1 Η · * cn 1 ο 1 Η ο 1 each ο 1 舡 ο 1 Private ο 1 Office σ 1 cn 1 09 Ο 5th to oeo 1 ο οι 1 to ο 1+ ο 1 CO ο 1 — Ο 1 cn 1 Η CJ1 1 1— »9 Ο 1 ο cn 1 time inside-inside (degrees) 00 o 1 ο CJ1 1 ΓΟ cn 1 ο οι 1 to ο I η αι 1 Ν) ο 1 Η cn I η cn 1 η ο The 5th time without waxing

Bifil Page 26 313886.ptd 1245825 V. Description of the invention (22) [Result] Compared with Comparative Example 5, the core-coated base paper coated with a butterfly is known to have a smaller degree of slipping out. That is, the frictional resistance becomes small. However, if the coating amount of wax is 4.2 mg / m 2 or more (Examples 3, 4 and Comparative Example 1), even if the coating amount is increased, the slip-out start angle is hardly changed. [Measurement of Consumption and Noise of Driving Power of the Corrugated Roller] The core papers of Examples 1 to 4 and Comparative Examples 1 to 3 were passed through a corrugating machine (50 O E manufactured by Mitsubishi Heavy Industries, Ltd.), and the paper width was 1 m. At a laminating speed of 15 Om / min, measure the consumption of electric power and the voice of the corrugated drum. At this time, in the experiment using Comparative Example 1, the wax transferred to the corrugated drum was carbonized, so black lines adhered to the corrugated core, and even the lining was contaminated. In addition, since the wax was excessively applied, the bonding failure of the sizing roller occurred. In Comparative Example 3, a similar situation occurred. Therefore, for Comparative Example 1 and Comparative Example 3, the production of corrugated paper using the above-mentioned corrugating machine was suspended, and this experiment and the following experiments were unnecessary. No other examples have found carbonization. The measurement results are shown in Table 2.

313886.ptd Page 27 1245825 V. Description of the invention (23) 2 Table [Comparative Example 5 Comparative Example 4 Comparative Example 3 Comparative Example 2 Comparative Example 1 Example 5 Example 4 Example 3 Example 2 Example 1 1 ο ο 00 1 ο ο 00 1 CO 00 • CO • CO »-* • ο violent 00 (mg / m2) to — CO < 〇1 Bu 1 — CO private — CO η-» GO • CO parameter cn — σ > Power consumption (kW) 1 1 ο CjJ 1 1 ο «1 1 ο 镛 00! Ο 00 1 ο 00 1 ο 1 ο Ο) Difference from Comparative Example 5 (without wax) (kW) Η * Ο * ο cn 1 Ο α > 1 l ·-* ο ο — ο Η I- * Ο l-fc Ι- * Ο b- * Η ο CO noise (square) 1 1 ΓΟ 1 1 μ 1 1 1 σ > 1 σ & gt 1 σ > \ Difference (square) from Comparative Example 5 313886.ptd Page 28 1245825 V. Description of the Invention (24) [Result] The driving power consumption is compared with Comparative Example 5 in Examples 1 to 5 Among them, a decrease was seen, and there was almost no change in Comparative Examples 2 and 4. In addition, a reduction in noise was also seen in Examples 1 to 5, and there was almost no change in Comparative Examples 2 and 4. [Check for cracking and cracking of ridges] The core base papers of Examples 1 to 5 and Comparative Examples 2, 4 and 5 were passed through a corrugating machine (60 g, manufactured by Erman Heavy Industries, Ltd.), and the bonding speed was increased , Note the rate at which the corrugation breaks or the corrugation breaks. [Results] In Comparative Example 5, corrugated cracking sometimes occurred at a bonding speed of 300 m / min, but the core base papers of Examples 1 to 5 did not increase the bonding speed to 390 m / min. Corrugation cracking will occur. Further, the core base paper of Comparative Example 2 had corrugated cracking at 330 m / min. Corrugated cracking occurred before the number of experiments (5 times) reached 390 m / min. Furthermore, the core base paper of Comparative Example 4 may have corrugated cracking at 350 m / min, and occurred four times before reaching 390 m / min out of the number of experiments (5 times). The corrugation was broken, but at one time, the corrugation was not broken even at 390 m / min. [Abrasion inspection of corrugated drum] The core base papers of Examples 1 to 5 and Comparative Example 5 were passed through a corrugating forming machine (50E manufactured by Mitsubishi Heavy Industries, Ltd.), and the laminating speed was 150 m / min.

313886.ptd Page 29 1245825 V. Description of the invention (25) Start up for 1000 hours and 2 0 0 hours 5 Then pass the pressure sensitive paper through the corrugated roller to observe the wear status of the corrugated roller. In addition, J can borrow The degree of wear of the corrugated cylinder can be identified by the coloring of the pressure-sensitive paper. [Result] In any of the above embodiments, the pressure-sensitive paper is uniformly colored (that is, 5 does not change due to the pressure caused by the position of the corrugated roller 9), and therefore, there is almost no wear. In Comparative Example 5, in the experiment after 1000 hours, the vicinity of the two ends of the pressure-sensitive paper was slightly thicker than the center (that is, the center of the corrugated roller began to wear), and it was even more after 2000 hours. In order to be significant (combining the above experiments, it can be judged that the preferred coating amount of the pests relative to the core paper is 0.1 to 1 Omg / m 2. The invention has been described above, but the invention is not limited to implementation For example, as long as it does not deviate from its essential scope, there can be various other modification examples. For example, in this specification, the case where the dispersion liquid is sprayed on the final dryer in the upper stage is explained, but when A method in which a plurality of dryers, such as two upper and lower final dryers, are combined. [Effects of the Invention] According to the present invention, when corrugations are formed by a corrugated drum, 5 no corrugation cracks occur. Corrugated base paper for corrugated paper

313886.ptd Page 30 1245825 V. Description of the invention (26) Furthermore, a core base paper can be produced which can prevent the wear of the corrugated roller and reduce the consumption of driving power and noise. Furthermore, it is possible to produce a core base paper which can uniformly and efficiently apply wax to the core base paper without contaminating equipment such as a papermaking machine.

313886.ptd Page 31 1245825 Brief description of the drawing [Simplified description of the drawing] Fig. 1 is a schematic diagram of a papermaking machine. Fig. 2 is an enlarged view near the final dryer. Fig. 3 is a schematic diagram of a method for spraying a dispersion liquid. Fig. 4 is a schematic view of a final group and a drum section of a dryer section of a papermaking machine. Fig. 5 is a drawing of a single-sided corrugated board forming process of a single-sided corrugating machine. [Explanation of symbols] 100 core paper 101 upper corrugated roller 102 lower corrugated roller 103 core 104 sizing roller 105 crimping roller 106 outline 107 single-sided paper corrugated cardboard 108 paste tank A pressurizing section B dryer section The first group B, C9, upper canvas B2, C10, lower canvas C, the final group of dryer parts Cl, first dryer C2, second dryer C3, third dryer C4, fourth dryer C5, fifth dryer C6, sixth dryer C7 Final dryer in the lower section C8 Final dryer in the upper section C1 1, C12 Canvas roller D Drum section D1 Moisture measurement

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Claims (1)

1245825 Case No. 91116848 Amendment 6. Scope of patent application 1. A core base paper for corrugated paper is a core base paper for corrugated paper which is formed by coating wax on the surface and inside, which is characterized in that the coating amount is relative to the core base paper. It is 0.1 to 10 mg / m 2. The moisture content of the aforementioned core base paper when coating wax is less than 10%. 2. For example, the core base paper for corrugated paper according to item 1 of the patent application scope, wherein the aforementioned dispersion is sprayed on the final dryer of a papermaking machine, and the wax in the dispersion is transferred and coated on the core base paper. By. 3. The core base paper for corrugated paper according to item 1 of the application, wherein the wax is a dispersion liquid in which a wax is sprayed on a paper roll of a paper machine, and the wax in the dispersion is transferred and coated on the core base paper. 4. A method for manufacturing core base paper for corrugated paper, which is a method for manufacturing corrugated core base paper for corrugated paper using a paper machine having a plurality of dryers, characterized in that the wax is sprayed on the surface of the dryer The dispersing liquid makes the tincture oily on the surface of the heated dryer, and the oiled wax is transferred from the surface of the dryer to the surface of the core base paper. The coating amount of the wax relative to the core base paper is 0. 1 to 10 mg / m ^ coating, and the moisture content of the aforementioned core base paper when spraying the dispersion of wax is less than 10%. 5. For the method for manufacturing core base paper for corrugated paper according to item 4 of the patent application scope, wherein the aforementioned dryer is a dryer belonging to the final group of papermaking machines. 6. For the method for manufacturing core base paper for corrugated paper according to item 4 of the scope of patent application, wherein the aforementioned dryer is the upper or lower final dryer among the dryers belonging to the final group. 313886 Rev. ptc Page 34 1245825 _ Case No. 91116848 年 斗 年 （j 月 > 7th __ 六 、 Applicable patent scope 7. For example, the manufacturing method of core base paper for corrugated paper according to item 4 of the patent scope, where The aforementioned melting point is lower than the surface temperature of the dryer. 8. — A method for manufacturing a core base paper for corrugated paper is a method for manufacturing a core base paper for corrugated paper coated with wax using a papermaking machine with a paper roll, which Features: spray the dispersion of the wax on the surface of the paper roll, and the wax is transferred from the surface of the paper roll to the surface of the core base paper, the aforementioned wax is coated relative to the core base paper is 0. 1 to 10 mg / m, and the moisture content of the aforementioned core base paper when spraying the dispersion of the butterfly is less than 10%. 9. If the core of corrugated paper for item 4 or 8 of the scope of patent application is applied The manufacturing method of the base paper, wherein the wax is transferred to the surface of the core base paper, and then the core base paper is wound, so that a part of the wax is transferred to the core base paper. 4 or item 8 for corrugated cardboard A manufacturing method in which the aforementioned wax is used alone or in combination with paraffin wax, polyethylene wax, or microcrystalline wax. 1 1. The manufacturing method of core base paper for corrugated paper according to item 4 or 8 of the scope of patent application, wherein The aforementioned dispersion liquid also contains a solid lubricant or metal soap. 1 2. The method for manufacturing a core base paper for corrugated paper according to item 4 or 8 of the scope of patent application, wherein the aforementioned dispersion liquid further comprises oil. 1 3. — A method for manufacturing a core base paper for corrugated paper is a method for manufacturing a core base paper for corrugated paper coated with wax using a paper machine having a plurality of dryers, which is characterized in that: Revision 313886.ptc Page 35 1245825 _Case No. 91116848_ Year of the Year Revised _ Sixth, the area of the patent application area where the moisture content of the base paper is less than 10%, and the surface of the heated dryer is sprayed with butterflies The dispersing liquid makes the butterfly oily on the surface of the heated dryer, and the oiled wax is transferred from the surface of the dryer to the surface of the core paper, and the amount of wax applied to the core paper is 0.1 to 10 mg / m. 1 4. A method for manufacturing a core base paper for corrugated paper, which is a method for manufacturing a core base paper for corrugated paper coated with wax using a papermaking machine having a paper roll, characterized in that a dispersion of Kande is sprayed on the surface of the paper roll 1 至 1 Omg / m 2 的 应用。 And it is transferred to the surface of the core base paper with a moisture content of less than 10%, and the coating amount of the wax relative to the core base paper is 0.1 to 1 Omg / m 2 coated. 1 5. —A wax or wax dispersion, characterized in that the dispersion is made of paraffin wax, polyethylene wax, or microcrystalline wax alone or in combination, and can be applied to the second or third item in the scope of patent applications. Core paper for corrugated paper as described. 16. A kind of wax or wax dispersion, which is characterized in that it is composed of paraffin wax, polyethylene wax or microcrystalline wax alone or in combination. Manufacturing method of core base paper for corrugated paper. 313886 Revision.ptc Page 36