Information providing apparatus, information providing method, and computer-readable storage medium

Abstract

The invention provides an information providing apparatus, an information providing method, and a computer-readable storage medium. The thickness of paper is made uniform with high precision in a papermaking process. An information provision device (10) according to an embodiment includes an acquisition unit (141), a calculation unit (142), and a provision unit (143). The acquisition unit (141) acquires, on the basis of the provided index, a measured value for the thickness of each portion of the paper and a measured value for the moisture content of each portion of the paper before or after a pressing step in which each portion of the paper is pressed by different pressing forces by the roller. The calculation unit (142) calculates an estimated value of the thickness of the paper after the change of the moisture content of the paper on the basis of the measured value of the thickness and the measured value of the moisture content. The supply unit (143) supplies the estimated value as an index to a device that performs the pressurization step.

Description

Technical Field

[0001] The present invention relates to an information providing device, an information providing method and a computer-readable storage medium. Background Art

[0002] Currently, there are known technologies for making the thickness of a paper strip (sheet of paper) uniform in the papermaking process. For example, Patent Document 2 describes a technology for adjusting the linear pressure in the width direction at a press section based on a measured thickness curve of the paper strip.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2003-27396

[0004] Patent Document 2: Japanese Patent Application Publication No. 2004-277899

[0005] Patent Document 3: Japanese Patent Application Publication No. 2013-108859

[0006] However, with current technology, it is sometimes impossible to uniformize the thickness of paper with high accuracy during the papermaking process.

[0007] For example, the thickness of paper changes according to the change of the moisture content in the paper. The moisture content of the paper also changes in the process after the process of adjusting the thickness or after the manufacturing. In contrast, in the current technology, the change of the thickness of the paper caused by the change of the moisture content is not fully considered. Summary of the invention

[0008] On one hand, the purpose is to uniformize the thickness of paper with high precision in the papermaking process.

[0009] An information providing device according to one aspect comprises: an acquisition unit which acquires, based on a provided index, measured values ​​of the thickness of each portion of the paper and measured values ​​of the moisture content of each portion of the paper before or after a pressurizing process in which each portion of the paper is pressurized by a roller at different pressures; a calculation unit which calculates an estimated value of the thickness of the paper after the moisture content of the paper changes, based on the measured value of the thickness and the measured value of the moisture content; and a providing unit which provides the estimated value as the index to a device that performs the pressurizing process.

[0010] An information providing method according to one aspect comprises a computer executing the following processing: based on a provided index, obtaining the measured values ​​of the thickness of each part of the paper and the measured values ​​of the moisture content of each part of the paper before or after a pressurizing process in which each part of the paper is pressurized by a roller at different pressures; based on the measured values ​​of the thickness and the measured values ​​of the moisture content, calculating an estimated value of the thickness of the paper after the moisture content of the paper changes; and providing the estimated value as the index to a device executing the pressurizing process.

[0011] One aspect involves a computer-readable recording medium having recorded thereon an information providing program, which causes a computer to execute the following processing: based on a provided indicator, obtaining a measured value of the thickness of each portion of the paper and a measured value of the moisture content of each portion of the paper before or after a pressurizing process in which each portion of the paper is pressurized by a roller at different pressures; based on the measured value of the thickness and the measured value of the moisture content, calculating an estimated value of the thickness of the paper after the moisture content of the paper changes; and providing the estimated value as the indicator to a device that executes the pressurizing process.

[0012] Effects of the Invention

[0013] According to the embodiment of the present invention, the thickness of paper can be made uniform with high accuracy in a papermaking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a diagram showing a configuration example of an adjustment system according to an embodiment.

[0015] Figure 2 It is a diagram showing a configuration example of an information providing device according to an embodiment.

[0016] Figure 3 This is a diagram for explaining the composite thickness curve.

[0017] Figure 4 This is a flowchart showing the processing flow of the information providing device according to the embodiment.

[0018] Figure 5 This is a diagram for explaining a hardware configuration example. DETAILED DESCRIPTION

[0019] Below, the information providing device, information providing method and computer-readable storage medium disclosed in the present application are described in detail based on the accompanying drawings. In addition, the present invention is not limited by the embodiments described here. In addition, the same reference numerals are marked on the same elements, and repeated descriptions are appropriately omitted. In addition, each embodiment can be appropriately combined within the scope of non-contradiction.

[0020] use Figure 1 The configuration of an adjustment system including an information providing device will be described. The adjustment system includes at least a portion of a paper production line and an information providing device.

[0021] like Figure 1 As shown, the adjustment system 1 includes an information providing device 10, a film thickness control device 20, a measuring device 30, and a winding device 40. Figure 1 The solid arrows indicate the flow of manufactured paper. In addition, the dotted arrows indicate the flow of data or signals.

[0022] The paper manufacturing production line includes a wire section, a press section, a drying section, a calender section, a winding process, etc. The calender section is supplied with paper in a state where water is removed to a certain extent. In the calender section, the supplied paper is pressurized by a roller and given gloss. In addition, the film thickness control device 20 and the winding device 40 may be part of a papermaking machine.

[0023] The film thickness control device 20 performs the processing of the calendering section. That is, the film thickness control device 20 controls the pressing pressure to adjust the paper thickness. The film thickness control device 20 changes the pressing pressure for each position in the width direction of the paper (a direction perpendicular to the conveying direction of the paper and parallel to the paper). For example, the film thickness control device 20 can locally heat the calendering roller and change the roller diameter to change the pressing pressure, or can use a plurality of actuators arranged inside the elastically deformable roller to change the pressing pressure.

[0024] The measuring device 30 measures the distribution of the paper thickness in the width direction (thickness curve) and the distribution of the moisture content in the width direction (moisture content curve) of the paper whose thickness is adjusted by the calendering unit. The measuring device 30 has a sensor that scans in the width direction of the paper. The sensor measures the thickness and moisture content.

[0025] The information providing device 10 calculates an index for adjusting the paper thickness based on the thickness curve and the moisture content curve, and provides the calculated index to the film thickness control device 20 .

[0026] For example, the index is an estimated value of the thickness of each portion in the width direction of the paper taking into account the moisture content. It is conceivable that the paper thickness measured by the measuring device 30 further changes according to the change in moisture content in the subsequent process. Therefore, for example, even if the paper thickness becomes uniform immediately after passing through the calendering section, the final paper thickness may not be uniform.

[0027] Therefore, the film thickness control device 20 adjusts the paper thickness based on an index calculated by taking into account the paper thickness and the moisture content, rather than the actual measured value of the paper thickness. Thus, the thickness of the final paper can be made uniform with higher accuracy. In addition, the specific method for calculating the index will be described later.

[0028] use Figure 2 The configuration of the information providing device 10 will be described. Figure 2 1 is a diagram showing a configuration example of an information providing device according to an embodiment of the present invention. Figure 2 As shown, the information providing device 10 includes an input unit 11 , an output unit 12 , a storage unit 13 , and a control unit 14 .

[0029] The input unit 11 is an interface for inputting data. The input unit 11 receives input of data from the measuring device 30 . The output unit 12 is an interface for outputting data. The output unit 12 outputs data to the film thickness control device 20 .

[0030] The storage unit 13 stores various data and various programs executed by the control unit 14. For example, the storage unit 13 is a storage device such as a memory and a hard disk. The storage unit 13 stores various data generated in the processing performed by the information providing device 10, such as data obtained in the process when the control unit 14 performs various processing and processing results obtained by performing various processing. The storage unit 13 stores coefficient information 131. The coefficient information 131 is the value of the coefficient used for calculating the index.

[0031] The control unit 14 is a processing unit that manages the entire information providing device 10. The control unit 14 includes an acquisition unit 141, a calculation unit 142, and a providing unit 143.

[0032] The acquisition unit 141 acquires the thickness curve and the moisture content curve from the measurement device 30 .

[0033] The calculation unit 142 calculates the index based on the thickness curve and the moisture content curve. The calculation unit 142 performs the calculation using the composite thickness curve as the index. The composite thickness curve is an estimated value of the absolute dry paper thickness or the air-dried paper thickness.

[0034] The absolute dry thickness is the thickness of the paper when it is completely dry (moisture content is 0%) after manufacture. The air-dried thickness is the thickness of the paper when the moisture content of the paper becomes uniform after the moisture content of the paper is naturally dried.

[0035] Figure 3 Graph 501 is a graph for explaining a composite thickness curve. The x-axis is an axis indicating the position in the width direction of the paper. The y-axis is an axis indicating the thickness of the paper. Curve 501 is a curve indicating the thickness of the paper.

[0036] The portion of the paper is represented by the value of x as the position in the width direction of the paper. The thickness curve acquired by the acquisition unit 141 is the thickness of the paper corresponding to each value of x. In addition, the moisture content curve acquired by the acquisition unit 141 is the moisture content of the paper corresponding to each value of x.

[0037] For example, the thickness curve shows that the measured value of the thickness at the position x=x1 is CLP1. Also, for example, the thickness curve shows that the measured value of the thickness at the position x=x2 is CLP2. Also, CLP AVE It is the average value of the measured values ​​of the thickness at each position.

[0038] exist Figure 3 Although not shown in the figure, the moisture content curve shows the measured value of the moisture content at each position. For example, the moisture content curve shows that the measured value of the moisture content at the position x=x1 is MP1. In addition, for example, the moisture content curve shows that the measured value of the moisture content at the position x=x2 is MP2.

[0039] For example, the calculation unit 142 calculates the composite thickness curve (absolute dry paper thickness or air-dried paper thickness) at each position in the width direction of the paper using at least any one of the following equations (1) to (7), wherein CLP and MP are the measured values ​​of the thickness and moisture content at each position.

[0040] α and β are predetermined conversion coefficients and take positive values. α and β are included in the coefficient information 131. ΔMP is a predetermined fixed value of the moisture content or an average value of the measured values ​​of the moisture content at each position (MP AVE ) and the measured value MP of the moisture content. In addition, function f(z) is a function that represents the change in film thickness relative to the moisture content z. For example, the paper thickness when the moisture content is z is the absolute dry paper thickness + f(z).

[0041] The calculation unit 142 can calculate the absolute dry paper thickness by subtracting a value obtained by multiplying the conversion coefficient α and the measured value MP of the moisture content from the measured value CLP of the thickness as shown in Formula (1).

[0042] Absolute dry paper thickness = CLP-α*MP(1)

[0043] The calculation unit 142 can calculate the absolute dry paper thickness by subtracting a value obtained by multiplying the conversion coefficient β, the measured value of moisture content MP, and the measured value of thickness CLP from the measured value of thickness CLP as shown in formula (2).

[0044] Absolute dry paper thickness = CLP-β*MP*CLP(2)

[0045] The calculation unit 142 can subtract the conversion coefficient β, the measured value MP of the moisture content, and the average value CLP of the measured value of the thickness from the measured value CLP of the thickness as shown in Formula (3).AVE Multiply the resulting values ​​to calculate the absolute dry paper thickness.

[0046] Absolutely dry paper thickness = CLP-β*MP*CLP AVE (3)

[0047] The calculation unit 142 can calculate the air-dried paper thickness by subtracting a value obtained by multiplying the conversion coefficient α and ΔMP from the measured thickness value CLP as shown in Formula (4).

[0048] Air-dried paper thickness = CLP-α*(ΔMP)(4)

[0049] The calculation unit 142 can calculate the air-dried paper thickness by subtracting a value obtained by multiplying the conversion coefficient β, ΔMP and the measured thickness value CLP from the measured thickness value CLP as shown in Formula (5).

[0050] Air-dried paper thickness = CLP-β*(ΔMP)*CLP(5)

[0051] The calculation unit 142 can subtract the conversion coefficient β, ΔMP, and the average value CLP of the thickness measurement value from the thickness measurement value CLP as shown in formula (6). AVE Multiply the resulting values ​​to calculate the air-dried paper thickness.

[0052] Air-dried paper thickness = CLP-β*(ΔMP)*CLP AVE (6)

[0053] The calculation unit 142 can calculate the air-dried paper thickness by subtracting the difference between the film thickness change when the moisture content is the measured value MP and the film thickness change when the moisture content is the air-dried moisture content (eg, 6%) from the measured value CLP as shown in equation (7). The air-dried moisture content is preset.

[0054] Air-dried paper thickness = CLP - {f(MP) - f(air-dried moisture content)} (7)

[0055] Formulas (2), (3), (5), and (6) take into account that the change in paper thickness caused by the change in moisture content is not only related to the moisture content but also to the paper thickness itself (the second term on the right side of each formula is CLP or CLP AVE ). Thus, even brands with different paper thicknesses can keep the conversion coefficient within a constant range, making brand management easier.

[0056] In addition, in formula (2) and formula (5), the conversion coefficient is multiplied by the measured value of the thickness at each position. On the other hand, it can be considered that the unevenness of paper thickness is sufficiently small relative to the correction amount, so the CLP multiplied by the conversion coefficient can be replaced by the average value CLP as shown in formula (3) and formula (6). AVE In addition, the value multiplied by the transform coefficient is not limited to CLP and CLPAVE , as long as it is a quantity proportional to the amount of swelling of the paper, such as basis weight or bone dry basis weight. In addition, when the basis weight is used as a value to be multiplied by the conversion factor, the moisture content×basis weight represents the amount of moisture present in the paper.

[0057] The measuring device 30 can directly measure and output the amount of moisture contained in the paper instead of the moisture content. The information providing device 10 can calculate the composite thickness curve using the moisture content instead of the moisture content. In this case, the moisture content is replaced by the moisture content so that equations (1) and (4) can work effectively. In addition, in this case, even if the thickness and basis weight are multiplied as in equations (2), (3), (5), and (6), the conversion coefficients of brands with different paper thicknesses can be made to fall within a constant range, thus having the advantage of facilitating brand management.

[0058] For example, the calculation unit 142 can calculate the absolute dry paper thickness by replacing the moisture content MP in the equation (1) with the moisture content MW in the equation (8).

[0059] Absolute dry paper thickness = CLP-α*MW (8)

[0060] In addition, for example, the calculation unit 142 can calculate the air-dried paper thickness by replacing ΔMP in equation (4) with ΔMW in equation (9). ΔMW is a fixed value of the moisture content set in advance or an average value of the moisture content measured at each position (MW AVE ) is the difference between the measured value MW of the water content.

[0061] Air-dried paper thickness = CLP-α*(ΔMW)(9)

[0062] Furthermore, the measuring device 30 can measure the basis weight. In this case, the acquisition unit 141 further acquires the basis weight distribution of each portion of the paper, that is, the basis weight curve, from the measuring device 30. In this case, the calculation unit 142 calculates the composite curve using the basis weight curve.

[0063] For example, the calculation unit 142 can calculate the absolute dry thickness by replacing the second term CLP on the right side of equations (2) and (3) with the measured value BW of the basis weight in equation (10) or (11).

[0064] Absolute dry paper thickness = CLP-β*MP*BW (10)

[0065] Absolutely dry paper thickness = CLP-β*MP*BW AVE (11)

[0066] In addition, for example, the calculation unit 142 can calculate the CLP of the second term on the right side of equations (5) and (6) by: AVE The average value BW of the measured values ​​replaced with the basis weight AVEThe air-dried paper thickness can be calculated using formula (12) or (13).

[0067] Air-dried paper thickness = CLP-β*(ΔMP)*BW (12)

[0068] Air-dried paper thickness = CLP-β*(ΔMP)*BW AVE (13)

[0069] The providing unit 143 provides the composite paper thickness to the film thickness control device 20. That is, the providing unit 143 feeds back the composite thickness curve to the film thickness control device 20 based on the thickness curve and the moisture content curve obtained as a result of the processing of the calendering unit of the film thickness control device 20. Thus, the adjustment system 1 realizes feedback control.

[0070] The film thickness control device 20 controls the thickness of the paper in the width direction of the paper based on the composite thickness curve. Thus, even if the paper is dried after papermaking, the thickness of the paper without the influence of moisture remains uniform, so it is expected that the quality of the paper will be improved.

[0071] For example, when α=0.8, the information providing device 10 can correct the thickness change caused by the change in moisture content when calculating the composite thickness curve using equation (4) for a paper thickness (CLP) of 60 um. In this case, it can be considered that when β=α / 60=0.8 / 60=0.0133, the information providing device 10 can calculate the composite thickness curve using equation (5) or equation (6), thereby also being able to correct the thickness change caused by the change in moisture content. In this way, according to the information providing device 10, when producing brands with different film thicknesses, a value close to the conversion coefficient that has been successfully calibrated can be used as the conversion coefficient.

[0072] use Figure 4 The processing flow of the information providing device 10 will be described. Figure 4 This is a flowchart showing the processing flow of the information providing device according to the embodiment.

[0073] like Figure 4 As shown, first, the information providing device 10 obtains the thickness curve and the moisture content curve from the measuring device 30 (step S101). Next, the information providing device 10 calculates the composite thickness curve based on the thickness curve and the moisture content curve (step S102). Moreover, the information providing device 10 feeds back the composite thickness curve to the calendering part, that is, the film thickness control device 20 (step S103).

[0074] The information providing device 10 can further improve the accuracy of paper thickness adjustment by feedback control by repeatedly performing steps S101 to S103 .

[0075] [Effect]

[0076] As described above, the information providing device 10 includes the acquisition unit 141, the calculation unit 142, and the providing unit 143. The acquisition unit 141 acquires the measured values ​​of the thickness of each portion of the paper and the measured values ​​of the moisture content of each portion of the paper before or after the pressing process in which each portion of the paper is pressed by a roller at different pressures, based on the provided index. The calculation unit 142 calculates the estimated value of the thickness of the paper after the moisture content of the paper changes, based on the measured values ​​of the thickness and the measured values ​​of the moisture content. The providing unit 143 provides the estimated value as an index to the device that performs the pressing process.

[0077] Based on the provided index, the pressing process of pressing each part of the paper by using a roller with different pressures is a calendering section, which is performed by the film thickness control device 20. In addition, the measuring device 30 can measure the thickness and moisture content of the paper after the calendering section as described so far, and can also measure the thickness and moisture content of the paper before the calendering section. The estimated value of the thickness of the paper after the moisture content of the paper changes is the absolute dry paper thickness or air-dried paper thickness described in equations (1) to (7).

[0078] In this way, the information providing device 10 can calculate the index by considering not only the measured value of the paper thickness but also the measured value of the moisture content. As a result, the adjustment of the paper thickness based on the feedback control is further realized with high precision. As a result, according to the embodiment, the thickness of the paper can be made uniform with high precision in the papermaking process.

[0079] Here, when there is unevenness in the thickness of the paper, the paper is not smoothly conveyed during printing, the printing may fail, the printing quality may vary, and the commercial value of the paper may be deteriorated. According to the embodiment, this situation is avoided.

[0080] The film thickness control device 20 adjusts the thickness of the paper in the width direction in the calendering section so that the air-dried paper thickness provided as an index becomes flat. This adjustment makes the thickness curve of the paper in the air-dried state uniform.

[0081] Thus, according to the embodiment, by eliminating uneven moisture distribution after manufacturing, even if the thickness of the manufactured paper varies locally, the final paper thickness becomes flat. Thus, uneven thickness of the manufactured paper caused by moisture absorption and release during storage is reduced, and the quality of paper products is improved.

[0082] The thickness of the manufactured paper becomes uniform, thereby avoiding the occurrence of ink smearing and the unevenness of the size of the processed product. In addition, according to the embodiment, the unevenness of the paper roll is eliminated, and the quality defects such as wrinkles on the paper are eliminated. In addition, according to the embodiment, the unevenness of the paper roll is eliminated, thereby reducing paper jams when the paper is installed in the machine, instability of the machine, damage, etc. In addition, according to the embodiment, the energy required for the uniformity of the moisture content curve is reduced, which can contribute to resource saving and environmental protection.

[0083] [Modifications]

[0084] The embodiments can be modified appropriately in the following manners.

[0085] For example, the part of the adjustment system 1 that controls the thickness of the paper may be a part other than the calendering part. In addition, there may be a process of adjusting the moisture content of the paper before the process of controlling the thickness of the paper, or the moisture content adjustment may be performed in the calendering part. In this way, if the moisture content is adjusted to fall within a constant range in advance, the information providing device 10 can calculate the absolute dry paper thickness and the air-dried paper thickness efficiently and with high accuracy.

[0086] In addition, in the calendering section, the control for making the thickness flat and the control for making the moisture content flat can be performed simultaneously. As a result, the adjustment amount of the control for making the thickness flat becomes more constant, so it is easy to uniformly obtain the effect of smoothing the paper surface by the calendering section.

[0087] In addition, in the control of flattening the moisture content curve, a control of allowing a constant amount of deviation from the flat target can be performed. This can maintain a certain level of effect of smoothing the paper surface by the calendering section and reduce the energy invested in moisture content curve adjustment.

[0088] Furthermore, the control to flatten the paper thickness can be performed by adjusting the moisture content in the width direction while keeping the linear pressure of the pressing roller in the calendering section constant. In this case, the final paper thickness can be flattened while keeping the effect of smoothness imparted to the paper surface in the calendering section constant.

[0089] In addition, the moisture content can be adjusted so that it is not flat in the width direction of the paper but decreases at the ends of the paper. When the moisture content is adjusted so that it decreases at the ends of the paper, the actual paper thickness for making the air-dried film thickness curve flat becomes a curve that is not flat and thin at the ends. In some cases, paper having such a paper thickness distribution is easy to discharge air when winding, and the fluctuation of the paper during winding is reduced, making it easy to handle.

[0090] The information providing device 10 can perform a calculation to limit the deviation from the measured film thickness to a constant range when calculating the air-dried paper thickness. Here, the thickness of the paper when it is rolled up is close to the measured film thickness, so if the correction amount is too large, the paper is rolled up in a state where the film thickness is deviated, and wrinkles may occur and the paper cannot be rolled up smoothly. In contrast, if a limit is set on the correction amount, the winding posture is stable, thereby avoiding the stop of the operation due to the winding failure, and the operation can be continued.

[0091] [system]

[0092] The information including the processing sequence, control sequence, specific names, various data, and parameters shown in the above description and drawings can be changed arbitrarily unless otherwise specified.

[0093] In addition, the structural elements of each device shown in the drawings are functional concepts and do not necessarily need to be physically configured as shown in the drawings. That is, the specific method of dispersing and integrating each device is not limited to the method shown in the drawings. That is, all or part of them can be functionally or physically dispersed or integrated in any unit according to various loads, usage conditions, etc.

[0094] Furthermore, all or any part of each processing function performed by each device may be realized by a CPU and a program analyzed and executed by the CPU, or may be realized as hardware based on wired logic.

[0095] [hardware]

[0096] Next, a hardware configuration example of the control device 100 will be described. Figure 5 This is a diagram for explaining an example of a hardware configuration. Figure 5 As shown, the information providing device 10 includes a communication device 100a, a HDD (Hard Disk Drive) 100b, a storage 100c, and a processor 100d. Figure 5 The various components shown are connected to each other using a bus or the like.

[0097] The communication device 100a is a network interface card, etc., and communicates with other servers. Figure 2 The program and DB that execute the functions shown are stored.

[0098] The processor 100d reads and executes data from the HDD 100b or the like. Figure 2 The same processing program is developed in the memory 100c in each processing unit, thereby making the execution Figure 2For example, this process performs the same function as each processing unit of the information providing device 10. Specifically, the processor 100d performs the following process, that is, performs the same processing as the acquisition unit 141, the calculation unit 142, and the providing unit 143.

[0099] In this way, the information providing device 10 performs an operation as an information providing device that reads and executes a program to perform an information providing method. In addition, the information providing device 10 uses a medium reading device to read the above program from a recording medium and executes the read program, thereby being able to achieve the same functions as the above embodiment. In addition, the program described in this other embodiment is not limited to being executed by the information providing device 10. For example, when other computers or servers execute the program, or when they cooperate to execute the program, the present invention can also be applied in the same way.

[0100] The program can be distributed via a network such as the Internet. In addition, the program is recorded on a computer-readable recording medium such as a hard disk, a floppy disk (FD), a CD-ROM, an MO (Magneto-Optical disk), or a DVD (Digital Versatile Disc), and can be read from the recording medium and executed by a computer.

[0101] Description of the label

[0102] 10Information providing device

[0103] 11 Input section

[0104] 12 Output section

[0105] 13 Storage

[0106] 14. Control Unit

[0107] 20 Film thickness control device

[0108] 30 Measurement device

[0109] 40 Winding device

[0110] 131 coefficient information

[0111] 141 Acquisition Department

[0112] 142 Computing Department

[0113] 143 Provide Department

[0114] 501 Curve

Claims

1. An information providing device, wherein: The information providing device comprises: an acquisition unit that acquires, based on the provided index, a measured value of the thickness of each portion of the paper and a measured value of the moisture content of each portion of the paper before or after a pressing process of pressing each portion of the paper with a roller at different pressures; a calculation unit that calculates an estimated value of the thickness of the paper after the moisture content of the paper changes, based on the measured value of the thickness and the measured value of the moisture content; and A providing unit provides the estimated value as the index to a device that performs the pressurizing step.

2. The information providing device according to claim 1, wherein: The calculation unit calculates the index using a difference between the measured value of the thickness and the measured value of the moisture content of each portion of the paper and a preset fixed value of the moisture content or an average value of the measured values ​​of the moisture content.

3. The information providing device according to claim 1, wherein: The calculation unit calculates the index by subtracting a value obtained by multiplying a coefficient, a measured value of the moisture content, and a measured value of the thickness from the measured value of the thickness.

4. The information providing device according to claim 1, wherein: The calculation unit calculates the index by subtracting a value obtained by multiplying a coefficient, a measured value of the moisture content, and an average value of the measured value of the thickness from the measured value of the thickness.

5. The information providing device according to claim 1, wherein: The calculation unit calculates the index by subtracting a value obtained by multiplying a difference between the measured value of the moisture content and a preset fixed value of the moisture content or an average value of the measured values ​​of the moisture content by a coefficient from the measured value of the thickness.

6. The information providing device according to claim 1, wherein: The calculation unit calculates the index by subtracting a value obtained by multiplying a difference between the measured value of the moisture content and a preset fixed value of the moisture content or an average value of the measured values ​​of the moisture content by a coefficient and the measured value of the thickness from the measured value of the thickness.

7. The information providing device according to claim 1, wherein: The calculation unit calculates the index by subtracting a value obtained by multiplying a difference between the measured value of the moisture content and a preset fixed value of the moisture content or an average value of the measured values ​​of the moisture content by a coefficient and the average value of the measured values ​​of the thickness from the measured value of the thickness.

8. The information providing device according to claim 1, wherein: The calculation unit calculates the index by subtracting a difference between a change in film thickness with respect to the measured value of the moisture content and a change in film thickness with respect to the air-dried moisture content from the measured value of the thickness.

9. The information providing device according to claim 1, wherein: The acquisition unit further acquires the measured value of the basis weight of each part of the paper, The calculation unit calculates the index by subtracting a value obtained by multiplying a coefficient, the measured value of the moisture content, and the measured value of the basis weight from the measured value of the thickness.

10. The information providing device according to claim 1, wherein: The acquisition unit further acquires the measured value of the basis weight of each part of the paper, The calculation unit calculates the index by subtracting a value obtained by multiplying a difference between the measured value of the moisture content and a preset fixed value of the moisture content or an average value of the measured values ​​of the moisture content by a coefficient and the measured value of the basis weight from the measured value of the thickness.

11. A method for providing information, wherein: The following processing is performed by the computer: Based on the provided index, the measured value of the thickness of each portion of the paper and the measured value of the moisture content of each portion of the paper before or after the pressing process of pressing each portion of the paper with a roller at different pressures are obtained, calculating an estimated value of the thickness of the paper after the moisture content of the paper changes based on the measured value of the thickness and the measured value of the moisture content, The estimated value is provided as the index to a device that performs the pressurizing step.

12. A computer-readable recording medium having an information providing program recorded thereon, characterized in that: The information providing program causes the computer to execute the following processing: Based on the provided index, the measured value of the thickness of each portion of the paper and the measured value of the moisture content of each portion of the paper before or after the pressing process of pressing each portion of the paper with a roller at different pressures are obtained, calculating an estimated value of the thickness of the paper after the moisture content of the paper changes based on the measured value of the thickness and the measured value of the moisture content, The estimated value is provided as the index to a device that performs the pressurizing step.

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