JP5315884B2 - Sheet-like material conveying method and conveying apparatus, and sheet-like material winding body manufacturing method - Google Patents

Description

  The present invention is, for example, a method and apparatus for conveying a highly brittle sheet-like material such as a carbon fiber sheet obtained by binding short carbon fibers dispersed with a carbide of a thermosetting resin, and a sheet-like material. The present invention relates to a method for manufacturing a wound product.

  In recent years, various developments have been made on environmental issues and energy issues. Among them, fuel cells that take advantage of features such as CO2 reduction due to high power generation efficiency and the fact that the only waste is water are attracting attention.

  A fuel cell is composed of a catalyst, an electrode base material, a separator, etc., centering on an electrolyte membrane, and a porous carbon fiber sheet is used as the electrode base material. Cost reduction is indispensable for further popularization of fuel cells, and for this reason, of course, cost reduction is also required for electrode substrates.

  In order to reduce the cost, it is necessary to improve the productivity of the fuel cell, and the porous carbon fiber sheet-like material that is the electrode substrate is supplied to the fuel cell manufacturing process as a long product. It is effective to ensure continuity in the battery manufacturing process. Therefore, it is desired to supply a long sheet-like material that is an electrode base material as a wound body.

  However, in the manufacturing process of a porous carbon fiber sheet that is a conventional electrode base material, for example, a batch method using a hot press apparatus or the like has been mainstream in the curing process.

  In order to obtain a long electrode base material, continuation of the manufacturing process is required, and further, a technique for winding up the long electrode base material is also required.

  As a method for winding a porous carbon fiber sheet, the initial winding tension applied to the sheet is 30 N / m or more per unit width, the final winding tension is 20 N / m or more per unit width, and from the start of winding. There is a method of gradually reducing the winding tension toward the end of winding (see, for example, Patent Document 1). However, when winding a sheet material having a small surface friction coefficient and high brittleness, winding deviation occurs if the winding tension is low, and winding deviation does not occur if the winding tension is high. There is a problem in that it easily breaks when a minute scratch is present at the end. Further, when the sheet-like material having a small surface friction coefficient and a high rigidity is wound up by 150 m or more, when the sheet-like material is wound by a method of gradually decreasing the tension, the sheet-like material tightening force F in the radial direction is T, When the winding diameter is D, it is inversely proportional to the winding diameter D as shown in the following formula (2). Therefore, there is a problem that the winding diameter tends to shift as the winding diameter increases.

F = 2T / D (2)
Further, as a method of winding the porous carbon fiber sheet, there is a method of winding with a winding device having a winding shaft and a pressure roll arranged in parallel to the winding shaft (see, for example, Patent Document 1). . However, there is a problem that once the winding deviation occurs to suppress the sheet-like material on the winding shaft, it becomes difficult to suppress the winding deviation and the winding deviation becomes large.
JP 2002-302557 A

  In view of the above-mentioned problems in the prior art, an object of the present invention is to wind a carbon fiber sheet-like material in which dispersed carbon short fibers are bound with a resin and / or organic carbide. It is an object of the present invention to provide a sheet-like material conveying method and conveying device that have end faces that are not broken during winding, and a method for manufacturing a sheet-like wound material.

In order to achieve the above object, the present invention employs the following means. That is,
(1) A sheet-like material transport device having a winding shaft for unwinding a sheet-like material wound in a roll and a winding shaft for winding the unwound sheet-like material, wherein the sheet-like material is dispersed. A carbon fiber sheet formed by binding carbon short fibers with resin and / or organic carbide, and a position detecting means for the end of the sheet provided on the downstream side of the unwinding shaft, A moving means for moving the unwinding shaft in a direction parallel to the central axis of the unwinding shaft by a detection signal from the position detecting means, a control unit for controlling the moving means, and an upstream side of the winding shaft. And a nip roll having a nip width of 50 to 95% of the sheet-like material, which nips the sheet-like material.

(2) A sheet-like material transport device having a winding shaft for unwinding a sheet-like material wound in a roll and a winding shaft for winding the unwound sheet-like material, wherein the sheet-like material is dispersed. A carbon fiber sheet formed by binding carbon short fibers with resin and / or organic carbide, and a position detecting means for the end of the sheet provided on the downstream side of the unwinding shaft, A moving means for moving the unwinding shaft in a direction parallel to the center axis of the unwinding shaft in accordance with a detection signal from the position detecting means, a control unit for controlling the moving means, and provided immediately before the winding shaft; A sheet-like material conveying apparatus comprising a nip roll for nipping the sheet-like material.

(3) The sheet-like material conveyance device according to (2) , wherein a nip width by the nip roll is 50 to 95% of a width of the sheet-like material.

( 4 ) The sheet conveying apparatus according to any one of (1) to ( 3 ), wherein both of the nip rolls are free rolls.

( 5 ) The sheet conveying apparatus according to any one of (1) to ( 4 ), wherein a brake mechanism is provided on at least one of the nip rolls.

( 6 ) Using the conveying apparatus according to any one of (1) to ( 5 ), the initial winding tension T1 is 40 N / m or more per unit width, and the final winding tension T2 is D1. A method for conveying a sheet-like material, which is wound up under conditions satisfying the following formula (1) when the initial winding diameter, D2, is set as the final winding diameter.

T1 ≦ T2 ≦ (D1 + D2) / D1 × T1 (1)
( 7 ) The sheet-like material is a carbon fiber sheet-like material in which dispersed carbon short fibers are bound with a resin and / or an organic carbide, and the sheet material has a flexural modulus of 3 -50 GPa, static friction coefficient is 0.1-0.7, Comprising: The conveyance method of the sheet-like material as described in said ( 6 ) wound up to the length of 150 m or more.

( 8 ) A method for producing a sheet-like wound body, in which a long sheet-like material is conveyed by the sheet-like material conveying method described in ( 6 ) above to obtain a sheet-like wound body.

( 9 ) The sheet-like material is a carbon fiber sheet-like material in which dispersed carbon short fibers are bound with a resin and / or an organic carbide, and the flexural modulus of the sheet-like material is 3 -50 GPa, static friction coefficient is 0.1-0.7, Comprising: The manufacturing method of the winding body of the sheet-like article as described in said ( 8 ) wound up to the length of 150 m or more.

    As described above, according to the present invention, since the nip roll is arranged on the upstream side of the winding shaft, the tension between the nip roll and the winding shaft can be made larger than the tension on the upstream side of the nip roll. It is possible to set a large winding tension without increasing the tension applied to the sheet, and roll the sheet end by setting the nip width to 50 to 95% of the sheet-like material. Can be prevented from being niped and a large tension is applied to the end, so that the winding end surface is aligned and the sheet-like material conveying method and conveying device that does not break during winding and the manufacture of the wound body A method can be obtained.

  According to the present invention, it is possible to obtain a sheet-like material conveying method and conveying device that can set a large winding tension of a sheet-like material, have uniform winding end surfaces, and do not break during winding. be able to.

  Moreover, according to this invention, the manufacturing method of the winding body of a sheet-like thing with few winding gaps can be obtained.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  1, 2 and 3 are schematic side views of a winding device for explaining an example of a winding method according to the present invention. FIG. 4 is a front view for explaining an example of the arrangement of the sheet end position detecting means. FIG. 5 is a front view for explaining the relationship between the width of the sheet-like material and the nip width. FIG. 6 is a schematic perspective view showing an example of a sheet-like product wound up according to the present invention. FIG. 7 is an explanatory diagram showing an example of the entire wound layer state of the sheet-like material wound body.

  As shown in FIG. 1, the present invention comprises a winding shaft 3 for winding a sheet-like material 7 unwound from a winding shaft 2 and continuously conveyed in the direction of the arrow, and the winding shaft 3. The nip roll 5 that nips the sheet-like material 7 upstream, the sheet end position detecting means 6 provided on the downstream side of the unwinding shaft 2, and a detection signal from the position detecting means 6 It is characterized in that it is wound up by a sheet-like material conveying apparatus having a moving means for moving the unloading shaft 2 in a direction parallel to the unwinding axis central axis and a control unit for controlling the moving means.

  By winding up the sheet-like material 7 according to the present invention, it is possible to separate the winding tension between the nip roll 5 and the winding shaft 3 and the conveying tension on the upstream side of the nip roll 5. The winding tension can be set large without increasing the tension upstream from the nip roll, so that the winding end surface is aligned and does not break during winding. 1 can be obtained.

  Here, as the sheet-like material 7, a sheet-like material made from short fibers including short carbon fibers, a woven or knitted fabric or non-woven fabric containing carbon fibers, or a sheet-like material in which carbon fibers are aligned in one or more directions, etc. Is a carbon fiber sheet formed by binding with a resin and / or an organic material. Furthermore, porous carbon sheet-like material obtained by further carbonizing the carbon fiber sheet-like material in an inert atmosphere, sheet-like material of fiber reinforced plastic other than carbon fiber, film, woven fabric, nonwoven fabric, There is no particular limitation on the material of the sheet-like material 7 such as paper. In particular, a carbon fiber sheet-like product in which dispersed carbon short fibers are bound with a resin and / or organic carbide has a high flexural modulus, a low static friction coefficient, and a brittle property. It is preferable to apply the method and the conveying device and the method for manufacturing the wound body. A method for producing a carbon fiber sheet-like product in which dispersed carbon short fibers are bound with a resin and / or an organic carbide is obtained by making a carbon short fiber, impregnating the resin and / or organic matter, The method of carbonizing resin and / or organic substance by heat processing is mentioned. As the resin, a phenol resin or furan resin is used, and as the organic substance, a material having a high carbonization yield by heat treatment such as pitch is used. A material having a low carbonization yield may be used in combination for the purpose of improving the porosity, pore diameter control, impregnation, and firing processability. Here, the dispersed state is often a state in which the short carbon fibers do not have a remarkable orientation in the sheet surface and are present almost randomly, for example, in a random direction. Specifically, the short fibers are dispersed by a papermaking method to be described later. The fiber length of the carbon short fibers to be dispersed is preferably 3 to 20 mm, more preferably 5 to 15 mm. By setting the fiber length of the short carbon fiber within the above range, when the short carbon fiber is dispersed and paper is obtained to obtain a carbon fiber sheet, the dispersibility of the short carbon fiber can be improved and the basis weight variation can be suppressed.

  A carbon fiber sheet obtained by subjecting the carbon fiber sheet to a water repellent treatment with a fluororesin such as polytetrafluoroethylene (PTFE) or a carbon fiber obtained by applying a mixture of carbon black and PTFE to the surface of the carbon fiber sheet. Like the original carbon fiber sheet, the sheet material has a high flexural modulus, a low coefficient of static friction, and a brittle property.The transport method and transport device of the present invention and the method for manufacturing the wound body are as follows. It is valid.

  As a method of winding the sheet-like material 7 in a roll shape, it can be performed by continuously winding the long sheet-like material 7 around the core bobbin 4 arranged on the winding shaft 3. In order to prevent the wound sheet from cracking, the outer diameter of the core bobbin is preferably 76 mm or more, and more preferably 152 mm or more. When the outer diameter of the core bobbin is smaller than 76 mm, the core bobbin easily breaks particularly when the thickness of the sheet is 0.2 mm or more. In order to make the wound roll compact, the outer diameter of the core bobbin is preferably 330 mm or less.

  As shown in FIG. 3, another guide roll 8 can be provided between the nip roll 5 and the take-up shaft 3, but the sheet-like material fed from the nip roll 5 is directly taken up by the take-up shaft 3. It is preferable that it is wound up and does not come into contact with other guide rolls 8 or the like.

  In the present invention, when the nip roll 5 for nipping the sheet-like material 7 is disposed immediately before the take-up shaft 3, no other guide roll 8 is provided between the take-up shaft 3 and the nip roll 5. The sheet material fed from the nip roll 5 is directly wound on the winding shaft 3. When the sheet-like material comes into contact with another guide roll 8 or the like in a state where tension is applied to the sheet-like material by the nip roll 5, the possibility that the sheet-like material is cut increases. In addition, if the high tension section between the nip portion of the nip roll 5 and the take-up shaft 3 is long, the possibility of the sheet-like material being cut by the tension increases, so the distance between the nip portion of the nip roll 5 and the take-up shaft 3 is 1 m or less. It is preferable that it is 0.5 m or less.

  Further, as shown in FIG. 4, the position detection means 6 at the end of the sheet-like object is preferably installed so that the position of either one of the right and left ends in the traveling direction of the sheet-like object 7 or the positions of both ends can be detected. . It is preferable to use a non-contact type sheet end position detecting means generally called EPC (edge position control: Nireco Co., Ltd.) as the position detecting section 6 of the sheet end. The sensor unit of the position detection means 6 at the end of the sheet-like object includes a photoelectric sensor using an infrared light emitting diode as a light source, an ultrasonic sensor, a detection method using air pressure, etc., but there is no particular limitation.

  Further, the unwinding shaft 2 arranged on the upstream side of the position detecting means 6 at the sheet end as shown in FIGS. 1 and 2 according to the detection signal of the position detecting means 6 at the end of the sheet. The guide roll 8 and the like are preferably moved to the left and right with respect to the direction parallel to the central axis of the unwinding shaft 2, that is, the traveling direction of the sheet-like material 7, and are controlled so as to eliminate the meandering of the sheet-like material 7. . By this control, the amount of winding deviation of the wound roll can be reduced.

  A measuring device such as a thickness meter or a weight meter, slitter, impregnation between the position detection means 6 at the end of the sheet-like material provided on the downstream side of the unwinding shaft and the nip roll 5 provided on the upstream side of the winding shaft An apparatus, a drying apparatus, a processing apparatus such as a coating apparatus, an appearance inspection apparatus, and the like may be provided, and measurement, processing, and inspection may be performed during sheet-like conveyance. In particular, when performing processing or measurement that affects the position in the width direction of the sheet-like material, such as coating or slitting at the end of the sheet-like material, unwinding from the unwinding shaft 2 of the present invention and continuously in the direction of the arrow A take-up shaft 3 for winding the conveyed sheet-like material 7 in a roll shape, a nip roll 5 for nipping the sheet-like material 7 on the upstream side of the take-up shaft 3, and a downstream side of the unwind shaft 2. The sheet end position detecting means 6, a moving means for moving the unwinding shaft 2 in a direction parallel to the unwinding axis central axis, and the moving means are controlled by a detection signal from the position detecting means 6. It is preferable to use a conveyance device for the sheet-like material 7 having a control unit and a conveyance method using the device because the positional accuracy of processing and measurement is increased.

As shown in FIG. 5, it is preferable that the nip by the nip roll 5 width _{W N} is 50 to 95% of the width _{W S} of the sheet, more preferably from 60% to 90%, more preferably at 70 to 85% is there. If the nip width W _N is smaller than 50% of the width W _S of the sheet-like material, the pressure applied to the central portion of the sheet-like material 7 increases, which may cause deformation or damage to the sheet-like material 7. When the nip width W _N is larger than 95% of the width W _S of the sheet-like material, the tension applied to the end portion of the sheet-like material 7 is increased, and fine scratches are present at the end portion of the sheet-like material 7. In some cases. The nip width W _N is a width in which the sheet-like material 7 is sandwiched between two nip rolls, and the lengths of the two rolls may be the same or different. Positioning is easy and preferable.

  The end of the nip roll 5 is preferably chamfered. In particular, when the lengths of the two nip rolls are different, it is preferable to chamfer the end of the short nip roll. Although the nip pressure is increased at the nip width end, an increase in the nip pressure can be suppressed by end chamfering.

  At least one of the nip rolls 5 is preferably a rubber roll having a hardness of 30 to 80 degrees, more preferably 30 to 70 degrees, and further preferably 40 to 60 degrees. If the hardness of the nip roll 5 is less than 30 degrees, the nip roll 5 may be deformed, and it may be difficult to convey the sheet-like material 7. If the hardness of the nip roll 5 is greater than 80 degrees, the sheet 7 is slipped at the nip portion of the nip roll 5 and it becomes difficult to separate the take-up tension and the transport tension. The roll 8 may break due to an increase in bending stress applied to the sheet 7 or a high winding tension over the entire length of the sheet.

  The hardness of the rubber roll can be determined according to the method defined in JIS K 6253 (1997). At this time, the hardness of the rubber roll is represented by the durometer hardness obtained in the durometer hardness test.

  The nip roll 5 is preferably a free roll, and at least one of the nip rolls 5 is preferably provided with a brake mechanism.

  There is no particular restriction on the brake system of the brake mechanism, but it is preferable that the brake system can apply a braking force with a simple mechanism.

  The guide roll 8 may be a free roll or a fixed roll, but is preferably a free roll in order to reduce friction with the sheet 7. In order to prevent the sheet 7 from cracking, the diameter of the guide roll 8 is preferably 76 mm or more, and more preferably 152 mm or more. When the diameter of the guide roll 8 is smaller than 76 mm, it is easy to break especially when the thickness of the sheet is 0.2 mm or more. In order to make the equipment compact, the outer diameter of the guide roll 8 is preferably 330 mm or less.

  The initial winding tension T1 of the sheet 7 is preferably 40 N / m or more per unit width, more preferably 40 N / m to 1000 N / m, more preferably 60 N / m to 600 N / m or more. It is. The final winding tension T2 is preferably a winding method that satisfies the following formula (1).

T1 ≦ T2 ≦ (D1 + D2) / D1 × T1 (1)
Here, T1: Initial winding tension (N / m)
T2: Final winding tension (N / m)
D1: Initial winding diameter (mm)
D2: Final winding diameter (mm)
If the initial winding tension T1 is less than 40 N / m, the winding end face may not be aligned when the sheet-like material 7 is wound. Moreover, the conveyance state of the sheet-like material 7 may become unstable and cause meandering. When the initial winding tension T1 is larger than 1000 N / m, deformation or breakage may occur when the sheet-like material 7 is wound. When the final winding tension T2 is smaller than the initial winding tension T1, the radius The fastening force F of the sheet-like material exerted on the direction is inversely proportional to the winding diameter as shown in the following formula (2) when the winding tension is T and the winding diameter is D. Therefore, the winding diameter D increases. Accordingly, it may be easily displaced in the axial direction.

F = 2T / (D / 1000) (2)
Where F: tightening force of the sheet-like material in the radial direction (N / m ² )
T: Winding tension (N / m)
D: Winding diameter (mm)
The sheet material 7 preferably has a flexural modulus of 3 to 50 GPa, more preferably 3 to 30 GPa, and even more preferably 3 to 20 GPa. When the bending elastic modulus of the sheet-like material 7 is smaller than 3 GPa, for example, when it is used for an electrode base material of a fuel cell, handling properties may be poor, and a drop into a separator groove may occur. When the sheet material 7 has a flexural modulus greater than 50 GPa, when the sheet material 7 is wound around the core bobbin 4 in a roll shape, it is difficult for the sheet material 7 to follow the core bobbin 4 due to rigidity, and the sheet material 7 is easy to wind May decrease and cause winding misalignment.

  The bending elastic modulus of the sheet-like material can be determined according to the method defined in JIS K 6911 (1995). At this time, the width of the test piece is 15 mm, the length is 40 mm, and the distance between fulcrums is 15 mm. Further, the radius of curvature of the fulcrum and the indenter is 3 mm, and the load speed is 2 mm / min. The bending elastic modulus of the sheet-like material is an index indicating the ease of winding into a roll shape and the quality of handling properties.

  The static friction coefficient of the sheet-like material 7 is preferably 0.1 to 0.7, more preferably 0.2 to 0.6, and still more preferably 0.2 to 0.5. If the static friction coefficient of the sheet-like material 7 is smaller than 0.1, the frictional force between the layers of the sheet-like material 7 is small, so that end deviation tends to occur after winding. When the static friction coefficient of the sheet-like material 7 is larger than 0.7, it is possible to obtain a wound body of the sheet-like material 7 in which the winding end surfaces are aligned by a conventional technique.

  The static friction coefficient of the sheet-like material is measured using a static friction coefficient measuring machine “Portable friction meter Muse Type: 94i” manufactured by Shinto Kagaku Co., Ltd. One sample cut to a diameter of 25 mm is attached to a weight on the lower surface of the measuring instrument, the measuring instrument is placed on the other sample, and when the measurement is started, a load for automatically moving the weight in the horizontal direction is applied. The static friction coefficient μ is measured with the maximum static friction force F as the load at the moment of starting to slide and the vertical force G as the weight of the weight. The static friction coefficient μ can be obtained from the following equation (3). The number of measurements is 10 times, and the static friction coefficient is calculated from the average value of 10 times.

μ = F / G (3)
Where μ: coefficient of static friction F: maximum static friction force (N)
G: Normal force (N)
According to the winding method of the present invention, carbon fibers formed by binding long, dispersed carbon short fibers of preferably 150 m or more, more preferably 150 m to 1000 m with resin and / or organic carbides. The sheet-like material 7 can be wound up as a wound-up body 1 of a sheet-like material having a winding shift amount t of 3 mm or less and not broken during winding.

  When the winding end surface of the sheet-shaped wound body 1 is aligned, the sheet-shaped object is obtained when the end of the sheet-shaped object 7 comes into contact with the packaging material when the sheet-shaped wound body 1 is conveyed. It is possible to prevent chipping of the end portion 7 and breakage during unwinding. Further, meandering at the time of unwinding the sheet-like material 7 can be suppressed, and the position adjustment in the width direction in the post-process water-repellent treatment and coating process is facilitated, and breakage due to meandering control is obviated. Can be prevented.

Winding deviation amount t, as shown in FIG. 7, the width W _S of the full width W and sheet material comprising a winding deviation of the winding body was measured using a scale or slide calipers, can be determined from the following equation (4) .

t = W−W _S (4)
Where, t: amount of winding deviation (mm)
W: Full width including winding deviation of the wound body (mm)
W _S : Width of sheet-like material (mm)

  The carbon fiber sheet-like material wound around the wound body obtained by the present invention can be applied not only to the electrode substrate of the polymer electrolyte fuel cell but also to various electrodes and radio wave absorbers. The application range is not limited to these.

It is the side schematic diagram which shows an example of the conveying apparatus explaining the conveying method by this invention. It is the side schematic diagram which shows the other example of the conveying apparatus explaining the conveying method by this invention. It is the side schematic diagram which shows the other example of the conveying apparatus explaining the conveying method by this invention. It is a front view explaining an example of arrangement | positioning of the position detection means of a sheet-like object edge part. It is front explanatory drawing explaining the relationship between the width | variety of a sheet-like material, and nip width | variety. It is a schematic perspective view which shows an example of the winding body of the sheet-like material conveyed by this invention. It is explanatory drawing which shows an example of the winding layer state of the whole winding body of the said sheet-like material.

Explanation of symbols

1: Winding body of sheet-like material 2: Unwinding shaft 3: Winding shaft 4: Core bobbin 5: Nip roll 6: Position detecting means 7: Sheet-like material 8: Guide roll W _S : Width of sheet-like material W _N : Nip width d: outer diameter of core bobbin D: winding diameter of sheet-like material W: full width including winding deviation of winding body

Claims (9)

A device for transporting a sheet material having an unwinding shaft for unwinding the sheet material wound in a roll shape and a take-up shaft for winding the unrolled sheet material, wherein the carbon material in which the sheet material is dispersed A position detecting means for detecting the position of the end portion of the sheet-like material provided on the downstream side of the unwinding shaft , and a carbon fiber sheet-like material in which the fibers are bound with resin and / or organic carbide. And a moving unit that moves the unwinding shaft in a direction parallel to the central axis of the unwinding shaft by a detection signal from the control unit, a control unit that controls the moving unit, and an upstream side of the winding shaft, And a nip roll having a nip width of 50 to 95% of the sheet material. A device for transporting a sheet material having an unwinding shaft for unwinding the sheet material wound in a roll shape and a take-up shaft for winding the unrolled sheet material, wherein the carbon material in which the sheet material is dispersed A position detecting means for detecting the position of the end portion of the sheet-like material provided on the downstream side of the unwinding shaft , and a carbon fiber sheet-like material in which the fibers are bound with resin and / or organic carbide. The sheet-shaped moving unit is configured to move the unwinding shaft in a direction parallel to the center axis of the unwinding shaft by a detection signal from the control unit, and a control unit that controls the moving unit. A sheet-like article conveyance device comprising a nip roll for nipping an article. The sheet-like material conveying apparatus according to claim 2, wherein a nip width by the nip roll is 50 to 95% of a width of the sheet-like material. The sheet-like article conveying apparatus according to any one of claims 1 to 3 , wherein both of the nip rolls are free rolls. The sheet conveying apparatus according to any one of claims 1 to 4 , wherein a brake mechanism is provided on at least one of the nip rolls. The sheet-like material is transported according to any one of claims 1 to 5 , the initial winding tension T1 is 40 N / m or more per unit width, the final winding tension T2 is D1 is the initial winding diameter, D2 A sheet-like material conveying method in which the final winding diameter is taken up under conditions that satisfy the following expression (1).
T1 ≦ T2 ≦ (D1 + D2) / D1 × T1 (1) The sheet-like material is a carbon fiber sheet-like material in which dispersed carbon short fibers are bound with a resin and / or an organic carbide, and the flexural modulus of the sheet-like material is 3 to 50 GPa, The method for conveying a sheet-like material according to claim 6 , wherein the static friction coefficient is 0.1 to 0.7, and the film is wound to a length of 150 m or more. The manufacturing method of the winding body of a sheet-like material which conveys a elongate sheet-like material by the conveyance method of the sheet-like material of Claim 6 , and makes it a winding body of a sheet-like material. The sheet-like material is a carbon fiber sheet-like material in which dispersed carbon short fibers are bound with a resin and / or an organic carbide, and the flexural modulus of the sheet-like material is 3 to 50 GPa, The manufacturing method of the winding body of the sheet-like article of Claim 8 whose static friction coefficient is 0.1-0.7, and is wound up to the length of 150 m or more.

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