Winding tube and method for manufacturing fiber wound body

Abstract

To provide a winding tube excellent in workability, repetitively usable over a long term and having high production efficiency of fiber, and a method of making a fiber roll wound up on the winding tube.SOLUTION: A winding tube 1, for winding a fiber on its outer peripheral surface, comprises a bonded portion 11c for maintaining shape and has a stress diffusing portion at the bonded portion 11c and / or around the bonded portion 11c. In addition, the winding tube 1 consists of a cloth member 11 in a rectangular sheet form and the bonded portion 11c is configured by superposing one end 11a and the other end 11b of the cloth member 11 doubly and bonding them at one point.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a technique for manufacturing a take-up tube and a fiber wound body wound on the take-up tube. [Background technology]

[0002] Generally, glass fibers are formed by continuously drawing molten glass from a number of nozzles provided at the bottom of a platinum bushing to form a number of glass filaments, spraying cooling water onto the formed glass filaments, applying a sizing agent, and then bundling these glass filaments in units of tens to thousands into glass fiber bundles called strands. The formed glass fiber is then wound onto the outer circumferential surface of a winding tube by a winding device, and formed into a hollow cylindrical wound body, which is the product form. Here, as the winding tube, for example, a winding tube made of synthetic resin as disclosed in Patent Document 1 is used. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Jikko No. 58-42359 Summary of the Invention [Problem to be solved by the invention]

[0004] The synthetic resin take-up tube in Patent Document 1 is resistant to deformation when the strand is removed from the tube and can be used repeatedly, but the strand is difficult to remove from the take-up tube, making it less easy to use. Furthermore, when removing the strand from the tube, stress tends to concentrate in one part of the tube, and if this is repeated many times, the tube may break. Furthermore, when trying to prevent breakage, workability may be reduced.

[0005] The present invention has been made in consideration of the current problems described above, and has an object to provide a winding tube that is easy to work with and can be used repeatedly over a long period of time, and a method for manufacturing a fiber wound body wound onto the winding tube. [Means for solving the problem]

[0006] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0007] That is, the take-up tube according to the present invention is a take-up tube for winding fibers on its outer circumferential surface, and is provided with adhesive parts for maintaining the shape, and has holes for diffusing stress at the adhesive parts and / or around the adhesive parts, and the take-up tube is made of a cylindrical body, and the cylindrical body is made of a cloth member wound in a roll shape, and the adhesive parts are formed by bonding one end of the cloth member to the other end of the cloth member on the outer circumferential surface. Materials a second adhesive portion on the inner circumferential surface that axially adheres the other end of the cloth member to the cloth member; and a third adhesive portion at both axial ends that circumferentially adheres the cloth member between the first adhesive portion and the second adhesive portion. As described above, the take-up tube according to the present invention has a stress diffusion portion that alleviates stress concentration at the adhesive bonded portion, preventing breakage of the take-up tube when the tube is removed, allowing the tube to be used repeatedly over a long period of time. Furthermore, because stress concentration is alleviated, there is no need to perform work while suppressing breakage, resulting in excellent workability. Furthermore, with this configuration, the first adhesive portion, the second adhesive portion, and the third adhesive portion can firmly secure both ends of the rolled fabric member in the winding direction, thereby more firmly maintaining the cylindrical outer shape of the take-up tube and increasing the number of times the take-up tube can be used.

[0008] The take-up tube is made of a rectangular sheet-shaped member, cloth One end and the other end of the member in the winding direction are clothIt is preferable that they are arranged in positions that overlap each other when viewed in the stacking direction of the members. With this configuration, the cylindrical shape of the take-up tube is maintained with a simple configuration.

[0009] Furthermore, in the take-up tube according to the present invention, the take-up tube is made of a cylindrical body having an air layer, the cylindrical body is formed of a cloth member made of a synthetic fiber sheet and a resin impregnated into the synthetic fiber sheet, and the resin has a melting point of 150°C or higher. As described above, the winding tube of the present invention uses a fabric member in which a synthetic fiber sheet is impregnated with a resin having a melting point of 150°C or higher, and therefore does not harden when repeatedly dried and wet, and is less likely to lose its shape, allowing it to be used repeatedly over a long period of time. Furthermore, since the cylindrical body is configured to have an air layer, it can be easily elastically deformed radially inward through the gap created by the air layer, making it easy to remove the winding tube from the wound fiber.

[0011] In the take-up tube according to the present invention, the synthetic fiber sheet has a basis weight of 150 g / m 2 It is preferable that this is equal to or greater than this. By having such a configuration, for example, when winding fibers around the outer peripheral surface of the winding tube, the winding force of the fibers can be prevented from compressing and deforming the cloth material in the thickness direction, thereby ensuring sufficient rigidity in the winding tube.

[0012] In the take-up tube according to the present invention, the synthetic fiber sheet is preferably a nonwoven fabric. A winding tube having such a configuration can be easily folded, and requires less storage space during storage.

[0013] In the take-up tube according to the present invention, the cylindrical body preferably has an outer peripheral surface provided with unevenness formed by embossing, with steps of 0.5 mm to 2.0 mm. With this configuration, when fibers are wound around the outer peripheral surface of the winding tube, the unevenness prevents the fibers from slipping against the rotating winding tube, thereby improving the quality of the shape of the wound fibers. Furthermore, for example, when removing a winding tube with glass fibers wound around it from the collet of a winding device or moving it to a predetermined location, the above-mentioned unevenness acts as an anti-slip barrier for the glass fibers, thereby preventing the glass fibers from shifting sideways relative to the winding tube and improving work efficiency. Furthermore, the unevenness scattered on the take-up tube allows stress to be dispersed.

[0014] The method for manufacturing a fiber wound body according to the present invention is a method for manufacturing a fiber wound body wound into a hollow cylindrical shape, and is characterized in that it includes a winding step in which the fiber is wound around the outer peripheral surface of a winding tube, and the winding tube is made of the above-mentioned winding tube. In the method for manufacturing a fiber wound body according to the present invention, the same effects as those described above can be obtained.

[0015] Furthermore, the method for manufacturing a fiber wound body according to the present invention preferably includes a winding step of winding fibers having a moisture content of 4% or more and 20% or less onto the outer surface of a winding tube; a drying step of drying the fibers wound in the winding step at a temperature of 100°C or more and 150°C or less to reduce the moisture content of the fibers to 1% or less; and a removal step of removing the winding tube from the fibers dried in the drying step. With this configuration, the surface layer of the wound fiber does not turn yellow. [Effects of the Invention]

[0016] The present invention has the following effects. In other words, the manufacturing method of the take-up tube and fiber wound body according to the present invention makes it possible to realize a take-up tube that is easy to work with and can be used repeatedly over a long period of time, and a manufacturing method of a fiber wound body wound onto the take-up tube. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a perspective view showing the overall configuration of a glass fiber wound body to be wound around a winding tube according to an embodiment of the present invention. [Figure 2] 1 is a perspective view showing the overall configuration of a take-up tube according to an embodiment of the present invention. [Figure 3] FIG. 10 is a perspective view showing the overall configuration of a take-up tube according to another embodiment of the present invention. [Figure 4] 1A and 1B are views of a winding tube according to one embodiment of the present invention viewed in the axial direction, where (a) shows a state in which the winding tube has been released from tension, for example, due to a collet of a winding device, and (b) shows a state in which the winding tube has been tensioned in the radial direction, for example, due to a collet of a winding device. DETAILED DESCRIPTION OF THE INVENTION

[0018] Next, an embodiment of the present invention will be described with reference to FIGS.

[0019] [Configuration of take-up tube 1] First, the structure of a take-up tube 1 embodying the present invention will be described with reference to FIGS. The take-up tube 1 in this embodiment can be used to wind up, for example, E-glass glass fiber S used for printed wiring boards and the like, as a hollow cylindrical wound body R called a cake. The glass fiber S wound onto the winding tube 1 is not limited to glass fiber for composite material applications, but may be, for example, optical glass fiber such as optical fiber, or various functional fibers such as carbon fiber and ceramic fiber.

[0020] As shown in FIG. 1, the take-up tube 1 is made up of a cylindrical body 10 having a substantially hollow cylindrical shape, and a collet 101 of a take-up device 100 is inserted into the hollow portion of the cylindrical body 10.

[0021] The take-up tube 1 is continuously rotated together with the collet 101 in a predetermined direction (the direction of the arrow X in FIG. 1) around the axis G. As a result, the glass fiber S is continuously wound around the outer circumferential surface of the winding tube 1 while being traversed, and a wound body R having a hollow cylindrical shape is formed. That is, a winding step is carried out in which the glass fiber S is wound around the outer peripheral surface of the winding tube 1.

[0022] The winding tube 1, which has wound up the wound body R of glass fiber S, is removed from the collet 101 while still holding the wound body R on its outer circumferential surface, and then dried together with the wound body R at a temperature of 100°C or higher and 150°C or lower. That is, a drying step is carried out to dry the glass fibers S wound in the winding step.

[0023] Then, the winding tube 1, which has been dried together with the wound body R of glass fiber S in the drying process, is pulled out from the wound body R while being elastically deformed radially inward and axially, to produce the final product, a glass fiber wound body. That is, a removal step is carried out in which the take-up tube 1 is removed from the wound body R of the glass fiber S dried in the drying step.

[0024] In this way, the winding tube 1 is used in the manufacturing process of the final product, which is a glass fiber wound body. For example, in this embodiment, the winding process winds glass fiber S having a moisture content of 4% or more and 20% or less onto the outer surface of the winding tube 1, the drying process reduces the moisture content of the glass fiber S wound in the winding process to 1% or less, and the removal process removes the winding tube 1 from the glass fiber S, thereby manufacturing a glass fiber wound body.

[0025] The cylindrical body 10 constituting the take-up tube 1 is made of a rectangular sheet-like fabric member 11 wound in a roll, and is formed into a substantially hollow cylindrical shape having multiple layers facing inward in the radial direction.

[0026] As shown in Figure 2, in a cylindrical body 10 consisting of a rectangular sheet-like cloth material 11 wound into a roll, one end 11a and the other end 11b of the cloth material 11 in the winding direction (i.e., the circumferential direction of the cylindrical body 10) are arranged in positions that overlap each other when viewed in the stacking direction of the cloth material 11 (i.e., the radial direction of the cylindrical body 10). For example, in this embodiment, one end 11a and the other end 11b of the cloth member 11 are arranged so as to be on the outer surface side and the inner surface side of the cylindrical body 10, respectively, and the tip 11a1 of the one end 11a and the tip 11b1 of the other end 11b are arranged so as to extend parallel to each other in the axial direction at positions close to each other.

[0027] Furthermore, the one end 11a and the other end 11b have an adhesive portion 11c at a position where they overlap. The adhesive portion 11c is configured to adhere the overlapping portion of the inner circumferential surface of the one end 11a and the outer circumferential surface of the other end 11b of the fabric member 11. For example, it is possible to adhere both surfaces by applying adhesive to the entire surface, or it is also possible to adhere only a portion of both surfaces by applying adhesive to the tip 11a1 of the one end 11a and the tip 11b1 of the other end 11b.

[0028] In this way, the take-up tube 1 has the adhesive portion 11c for maintaining the outer shape of a substantially hollow cylinder. In addition, the winding tube 1 is made of a rectangular sheet-shaped cloth member 11, and the adhesive portion 11c is configured by doubling up both ends of the cloth member 11 (in this embodiment, one end 11a and the other end 11b) and adhesively bonding them together at one point.

[0029] However, because both ends of the fabric member 11 are double-overlapped at the adhesive portion 11c, the adhesive portion 11c is thicker than other portions of the take-up tube 1, and stress (load) tends to concentrate thereon when the take-up tube 1 is removed from the glass fiber S. Furthermore, the take-up tube 1 is continuously rotated about the axis G in the direction of the arrow X in Fig. 1, which applies centrifugal force and frictional force, and loads tend to be applied to portions of the take-up tube 1 where the thicknesses are different.

[0030] Holes 11d, which are an example of a stress diffusion section, are provided in the overlapping portion of the one end 11a and the other end 11b. The holes 11d are formed by punching the rectangular sheet-shaped fabric member 11 in a rolled state, at the overlapping portion between the inner circumferential surface of the one end 11a and the outer circumferential surface of the other end 11b. Three holes 11d are formed in the center and on both ends in the direction of the axial core G. By providing the holes 11d, stress applied to the winding tube 1 when, for example, removing the winding tube 1 from the glass fiber S can be dispersed not only to the adhesive portion 11c at the overlapping portion of the one end 11a and the other end 11b but also to the periphery of the holes 11d, thereby preventing breakage at the one end 11a and the other end 11b. Note that a large number of holes 11d may reduce the strength of the winding tube 1, so the number of holes 11d is preferably five or less. Note that the number of holes 11d is preferably two or more. The diameter of the holes 11d is preferably 5 mm or more and 15 mm or less. If the holes 11d have this size, stress can be efficiently dispersed and the strength of the take-up tube 1 can be prevented from being reduced due to the holes 11d.

[0031] Furthermore, notches, which are an example of stress diffusion portions, may be provided at regular intervals in the circumferential direction from end portion 11c at both axial end portions of fabric member 11. The notches can be arranged at both axial end portions of fabric member 11 at positions with the same peripheral angle. By providing such a notch, the stress acting on the take-up tube 1, for example when removing the take-up tube 1 from the glass fiber S, can be dispersed not only to a portion of the adhesive portion 11c where the one end 11a and the other end 11b overlap, but also to the periphery of the notch, thereby preventing breakage at the one end 11a and the other end 11b. Although stress can be dispersed whether the holes 11d and notches are provided, whether only the holes 11d are provided, or whether only the notches are provided, stress can be dispersed more efficiently by providing the holes 11d and notches.

[0032] Here, the fabric member 11 is made of a synthetic fiber sheet and a resin impregnated in the synthetic fiber sheet that has a melting point of 150°C or higher, and is configured to have sufficient heat resistance and be elastically deformable in any direction.

[0033] As shown in FIG. 3, the cylindrical body 10 may be configured to include a first adhesive portion 16 that axially bonds one end 11a of the cloth member 11 along its tip 11a1 on the outer peripheral surface of the cylindrical body 10, which is made of a strip-shaped cloth member 11 wound in a roll, a second adhesive portion 17 that axially bonds the other end 11b of the cloth member 11 along its tip 11b1 on the inner peripheral surface, and third adhesive portions 18·18 that circumferentially bond the first adhesive portion 16 and the second adhesive portion 17 at both axial ends.

[0034] As a result, one end 11a and the other end 11b of the fabric member 11 are more firmly fixed by these first adhesive portion 16, second adhesive portion 17, and third adhesive portion 18, and the cylindrical outer shape of the winding tube 1 can be more firmly maintained, for example, when the winding tube 1 is reused.

[0035] The first adhesive portion 16, the second adhesive portion 17, and the third adhesive portion 18 are formed, for example, by bonding with an adhesive or by heating the areas around these adhesive portions to 250°C or higher to fuse the fabric members.

[0036] In addition, in the cylindrical body 10, at least the outer peripheral surface of the fabric member 11 constituting the outer peripheral layer 13 is embossed to form a plurality of irregularities 15 each having a step height of 0.5 mm to 2.0 mm.

[0037] In this way, the outer peripheral surface of the cylindrical body 10 constituting the winding tube 1 is provided with a plurality of irregularities 15 scattered thereon. For example, when glass fiber S (see FIG. 1) is wound around the outer peripheral surface of the winding tube 1, the irregularities 15 prevent the glass fiber S from slipping relative to the rotating winding tube 1, thereby improving the quality of the shape of the wound glass fiber S (i.e., the wound body R). Furthermore, when the winding tube 1 is removed from the collet 101 of the winding device 100 while the wound body R is still held on the outer circumferential surface, or when the removed winding tube 1 is then moved to a predetermined location, the above-mentioned unevenness 15 functions as an anti-slip device for the wound body R relative to the winding tube 1, thereby preventing the wound body R from shifting sideways relative to the winding tube 1 and improving work efficiency. Furthermore, the scattered irregularities 15 can disperse stress.

[0038] Also, as shown in FIG. 4(a), the cylindrical body 10 may be formed from a single spirally wound cloth member 11, and configured to have multiple layers (two layers in this embodiment) consisting of an outer circumferential layer 13 and an inner circumferential layer 14 with an air layer 12 interposed therebetween toward the radially inward direction.

[0039] Here, the cloth member 11 is made of a synthetic fiber sheet and a resin with a melting point of 150°C or higher that is impregnated into the synthetic fiber sheet, and is configured to have sufficient heat resistance and be elastically deformable in any direction. For example, in this embodiment, a synthetic fiber sheet is formed from a nonwoven fabric made of PET (polyethylene terephthalate) resin, which has excellent heat resistance, and the synthetic fiber sheet is pre-impregnated with acrylic resin having a melting point of 150°C or higher.

[0040] If the fabric member 11 is not impregnated with a resin having a melting point of 150° C. or higher, the strength of the fabric member 11 is low, making it difficult to maintain the approximately hollow cylindrical shape. Furthermore, unlike paper strength agents, such resins do not harden and become brittle when repeatedly dried and wet.

[0041] Therefore, by forming the take-up tube 1 from a flexible nonwoven fabric, it can be easily folded and the storage space required for storage can be reduced.

[0042] The synthetic fiber sheet forming the fabric member 11 is not limited to a nonwoven fabric made of PET resin, but may be a nonwoven fabric made of, for example, PP (polypropylene) resin, which also has excellent heat resistance. It is preferable that the melting point of the synthetic fibers constituting the synthetic fiber sheet is 150° C. or higher, since this can prevent the synthetic fiber sheet from deteriorating due to drying. Furthermore, nonwoven fabric made of PET resin is more preferable because it has excellent heat resistance and sufficient elasticity, allowing the take-up tube 1 to be easily removed from the formed wound body R.

[0043] As described above, in the take-up tube 1 of this embodiment, spaces formed by the air layers 12 are present between the multiple layers (the outer circumferential layer 13 and the inner circumferential layer 14) of the cylindrical body 10, and therefore the outer circumferential layer 13 can easily elastically deform radially inward, and the inner circumferential layer 14 can easily elastically deform radially outward, via the air layers 12. Therefore, stress applied to the take-up tube 1 is alleviated.

[0044] Therefore, the winding tube 1 has sufficient rigidity to maintain its cylindrical outer shape, while being easily elastically deformed radially inward through the space (gap) created by the air layer 12, as shown in Figure 4(b), and for example, the winding tube 1 can be easily removed from the formed wound body R.

[0045] Furthermore, in the winding tube 1 of this embodiment, the fabric member 11 forming the cylindrical body 10 is made of a synthetic fiber sheet and a resin (acrylic resin) impregnated into the synthetic fiber sheet and having a melting point of 150°C or higher. Therefore, for example, in a drying process for drying the glass fiber S (wound body R) wound around the winding tube 1, even if the wound body R is exposed to temperatures of 100°C or higher and 150°C or lower for a long period of time, sufficient heat resistance can be exhibited. Therefore, even if the winding tube 1 is used multiple times, for example, 5 to 50 times, and is repeatedly dried and wetted, the winding tube 1 does not harden and can be used repeatedly. It is preferable that the winding tube 1 can be used 10 or more times, and 30 or more times.

[0046] Furthermore, in the winding tube 1 of this embodiment, the cloth member 11 is made of the above-mentioned synthetic fiber sheet and the above-mentioned resin. Therefore, unlike a winding tube formed by gluing together multiple sheets of paperboard (kraft paper), for example, the surface of the glass fibers S is less likely to turn yellow due to a chemical reaction between the paper strength agent that has seeped out onto the surface of the paperboard and the bundling agent that is attached to the glass fibers S wound onto the winding tube. Therefore, the winding tube 1 can be repeatedly reused over a long period of time while maintaining the quality of the glass fibers S.

[0047] In this embodiment, as described above, a single cloth member 11 is spirally wound to form multiple layers (outer layer 13 and inner layer 14) with an air layer 12 interposed therebetween. However, this is not limited to this. For example, a hollow cylindrical cloth member 11 that forms the inner layer 14 may be separately arranged coaxially on the inner periphery of the hollow cylindrical cloth member 11 that forms the outer layer 13, and a spacer may be provided between the outer layer 13 and the inner layer 14 to form multiple layers with an air layer 12 interposed therebetween. Furthermore, the above-mentioned multiple layer configuration is not limited to two layers consisting of an outer layer 13 and an inner layer 14 with an air layer 12 interposed therebetween, but may be, for example, three or more layers with an air layer 12 interposed therebetween.

[0048] The weight of the synthetic fiber sheet is 150g / m 2 It is preferable that this is equal to or greater than this. With this configuration, for example, when winding glass fiber S around the outer peripheral surface of the winding tube 1, the winding force of the glass fiber S can be prevented from compressing and deforming the fabric member 11 in the thickness direction, thereby ensuring sufficient rigidity in the winding tube 1.

[0049] The amount of resin (acrylic resin) pre-impregnated into the synthetic fiber sheet is 50 g / m 2 More than 200g / m 2 Preferably, it is 80 g / m or less. 2 More than 150g / m 2 More preferably, it is: The amount of resin (acrylic resin) impregnated into the synthetic fiber sheet is 50g / m 2 If it is less than this, not only will it be difficult for the fabric member 11 to have sufficient heat resistance, but the strength may also be insufficient. On the other hand, the amount of resin (acrylic resin) impregnated into the synthetic fiber sheet is 200 g / m 2 If the thickness exceeds this value, the fabric member 11 will have too high a rigidity and will be difficult to deform elastically, and for example, it may be difficult to remove the take-up tube 1 from the wound body R that has been formed.

[0050] [Example] Next, an experiment for determining the effectiveness of the take-up tube 1 embodying the present invention and the method for manufacturing the glass fiber wound body (wound body R) wound on the take-up tube 1 will be described.

[0051] A nonwoven fabric made of PET resin impregnated with acrylic resin (melting point 160°C) was prepared, and this nonwoven fabric was used to form a winding tube with an outer diameter of 300 mm, a length of 310 mm, and a thickness of 1.60 mm. The ends of the nonwoven fabric in the examples and comparative examples were fused together, and in the examples, notches, an example of a stress diffusion section, were provided at regular intervals at both axial ends of the nonwoven fabric. In the examples, three holes, an example of a stress diffusion section, were formed in the area where the ends of the nonwoven fabric overlapped. In the comparative examples, no stress diffusion section was provided.

[0052] In the examples and comparative examples, the basis weight is 250 g / m 2 The nonwoven fabric made of PET resin was used, and the amount of acrylic resin impregnated was 80 g / m 2 It was decided to set it to

[0053] When the winding tubes of the Examples and Comparative Examples were used in production, the winding tube of Example 1 could be used 45 times, but the tube of Comparative Example 1 could only be used 3 times. [Explanation of symbols]

[0054] 1 Winding tube 10 Cylinder 11 Cloth parts 11a One end 11b Other end 11c Adhesive part 11d Hole (stress diffusion section) 12 Air Layer 13 Outer layer (multiple layers) 14 Inner layer (multiple layers) 15 Unevenness 16 First adhesive part 17 Second adhesive part 18 Third adhesive part R wound body (glass fiber wound body) S Glass Fiber

Claims

1. A winding tube for winding fibers on its outer circumferential surface, Equipped with adhesive to maintain shape, The adhesive layer has holes for diffusing stress at and / or around the adhesive layer, The winding tube is made of a cylindrical body, The cylindrical body is It is made of a fabric member wound in a roll shape, The adhesive portion is a first adhesive portion that axially adheres one end of the fabric member to the fabric member on an outer circumferential surface; a second adhesive portion that axially adheres the other end of the fabric member to the fabric member on the inner circumferential surface; a third adhesive portion that circumferentially adheres the fabric member between the first adhesive portion and the second adhesive portion at both axial ends of the fabric member; A winding tube characterized by:

2. The take-up tube is made of a rectangular sheet-shaped member, One end and the other end of the fabric member in the winding direction are arranged at positions overlapping each other when viewed in the stacking direction of the fabric member. The take-up tube according to claim 1 ,

3. the winding tube is a cylindrical body having an air layer, The cylindrical body is The fabric member is formed from a synthetic fiber sheet and a resin impregnated into the synthetic fiber sheet, The resin has a melting point of 150°C or higher. The take-up tube according to claim 1 ,

4. The weight of the synthetic fiber sheet is 150 g / m ２ That's all. The take-up tube according to claim 3 , characterized in that:

5. The synthetic fiber sheet is a nonwoven fabric. The take-up tube according to claim 3 or 4, characterized in that:

6. The cylindrical body is On the outer periphery, The surface has unevenness with a step height of 0.5 mm or more and 2.0 mm or less due to embossing. The take-up tube according to any one of claims 3 to 5, characterized in that:

7. A method for manufacturing a fiber wound body wound into a hollow cylindrical shape, comprising: a winding step of winding the fibers onto an outer peripheral surface of a winding tube, A method for manufacturing a fiber wound body, wherein the take-up tube is the take-up tube according to any one of claims 1 to 6.

8. a winding step of winding the fibers having a moisture content of 4% or more and 20% or less onto an outer peripheral surface of a winding tube; a drying step of drying the fiber wound in the winding step at a temperature of 100°C or higher and 150°C or lower to reduce the moisture content of the fiber to 1% or lower; and a removal step of removing the take-up tube from the fibers dried in the drying step. The method for producing a fiber wound body according to claim 7 .

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