TW202214498A - Film roll package and method for manufacturing same, and method for storing roll body - Google Patents

Abstract

The present invention provides a film roll package that is unlikely to occur a change in winding form of a film in a roll body even when the film roll package is stored for a long time. A roll body (10) includes a winding core (1) and a film winding body (3) including a long film wound around an outer circumference of the winding core to make a roll form. The long film has a knurl structure at each end in a width direction. A film roll package (101) includes a packaging material completely covering the entirety of the film winding body, and the film winding body is disposed in a pressurizing closed space formed by the packaging material.

Description

Film roll packing body, method for manufacturing the same, and method for storing roll body

The present invention relates to a film roll wrapping body in which a roll body that winds a long film in a roll shape is wrapped with a wrapping material, and a method for producing the same. Moreover, this invention relates to the storage method of a roll body.

A liquid crystal display device or an organic EL (Electroluminescence) display device uses an optical film such as a polarizing plate and a retardation plate. These optical films are provided as a single layer or a laminated film in which a plurality of films are laminated. For example, in general, a polarizing plate is a laminate in which a transparent protective film is laminated on one side or both sides of a polarizing element via an appropriate adhesive.

These film systems are manufactured as rolls in which a long film is wound around the outer periphery of a core (also referred to as a "core") in a roll shape, and are stored and transported in the state of a roll, and then transferred to the next process. For example, in the manufacturing process of the polarizing plate, after the transparent protective film serving as the protective layer of the polarizing element is temporarily wound into a roll as a single-layer film, in the next step, the transparent protective film is rolled out from the roll body, and The polarizing element is attached.

In order to prevent contamination or deformation of the film during the period from the production of the roll body to the time it is used in the next process, the roll body is wrapped with an appropriate packing material (packaging material) (for example, refer to Patent Document 1 and Patent Document 2). ). [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2020-97447 [Patent Document 2] International Publication No. 2012/060142

[Problems to be Solved by Invention]

When the long film is stored in the state of a roll body for a long period of time, the winding posture may be changed due to tight winding or adhesion of the films to each other. In particular, when a wide-width film is wound into a roll shape, a change in the winding posture is likely to occur due to deflection due to the self-weight of the film, etc., and the change in the external environment such as a clean room is small. When the roller body is stored in a different place, the winding posture may also change. If the winding posture of the roll body is changed, the quality of the film is deteriorated. For example, when it is used as an optical film, it becomes a cause of poor quality such as bright spots and defects of the displayed image.

In view of this problem, an object of the present invention is to provide a film roll packing body and a method for packing a roll body that are less likely to change in the winding posture of the film even when stored for a long period of time. [Technical means to solve problems]

One embodiment of the present invention is a film roll packing body which is a film roll wrapping body including a roll core and a film roll body formed by winding a long film around the outer periphery of the core core with a packing material. body. The long film may also have a knurled structure at both ends in the width direction. The elongated film may also be an optical film.

In the film roll packing body, the film roll body is arranged in the pressurized closed space formed by the packing material. In addition to the film winding body, the entire roll body including the core may be enclosed in a pressurized airtight space formed by a packing material.

Formation with a packing material is obtained by enclosing a gas in the space formed by the packing material from the opening in a state where the roll body is covered with a packing material having at least one opening, and closing the opening to be in a hermetic state. The pressurized airtight space is enclosed with the wrapping body of the film winding body. As the packing material having an opening, for example, a bag-shaped film having an opening on one side or a tubular film having an opening at both ends may be used.

The core of the roll body may also protrude from both ends in the width direction of the film roll body. The roll body can also be stored in a state where a load is applied to the protruding portion of the core. The packing material can also be wound around the protruding part of the core to fix the packing material. [Effect of invention]

By arranging the film winding body in the pressurized airtight space constituted by the packing material, the change of the winding posture of the roll body can be suppressed, so that the long-term storage can be realized in the state of the roll body.

[Roller body] FIG. 1 is a perspective view showing the appearance of a roller body according to an embodiment, and FIG. 2 is a cross-sectional view thereof. The roll body 10 is provided with the film winding body 3 which wound a long film in a roll shape on the outer periphery of the cylindrical core 1.

In the roll body 10, the long film wound on the core 1 may be transparent or opaque. The long film may also be an optical film for forming an image display device such as a liquid crystal display device or an organic EL display device. As an optical film, a polarizing plate, a polarizing element, a polarizing element protective film, a retardation plate, an antireflection film, a transparent conductive film, a hard coat film, etc. are mentioned.

Examples of the film material include cellulose-based resins, polyester-based resins, polyether-based resins, poly-based resins, polycarbonate-based resins, polyamide-based resins, polyimide-based resins, and polyolefins. resins, (meth)acrylic resins, cyclic polyolefin-based resins (noralkene-based resins), polyarylate-based resins, polystyrene-based resins, polyvinyl alcohol-based resins, and the like.

The thickness of the film is, for example, about 3 to 500 μm, or may be 5 to 300 μm, 10 to 200 μm, 15 to 150 μm, or 20 to 100 μm. The width of the elongated film (the length in the x-direction in Figure 1) is about 200-7000 mm, and may also be 500-5000 mm or 1000-4000 mm. The length of the long film is about 50 to 10000 m, and it can also be 100 to 7000 m, 300 to 5000 m, and 500 to 4000 m.

The long film is formed by, for example, a solution casting method or a melt film forming method. In the solution casting method, a resin solution is cast and coated on the surface of a support, and a certain degree of solvent is removed from the cast film and then peeled off from the support, thereby forming a film. It is also possible to remove the residual solvent by heating the film after peeling from the support. In the melt film forming method, a resin melt is cast on a support, cooled and solidified on the support, and then peeled off from the support to form a film. In any of the solution casting method and the melt film forming method, the film peeled from the support can also be subjected to processes such as stretching, coating, and cutting into a long strip. In the case of using a flexible film as a support in the solution casting method, processes such as stretching, coating, and cutting into long strips may also be performed before peeling the film from the support.

The film roll body 3 is formed by winding the long film so that the longitudinal direction of the long film follows the circumferential direction of the core 1 . In order to prevent winding deviation of the wound film or adhesion between the films, preferably, before winding the long film on the core 1, knurling is performed on both ends of the long film in the width direction to form Knurled construction 35. The knurled structure is also known as embossing or knurling with tiny irregularities.

FIG. 3 is a schematic cross-sectional view showing a state of lamination of films in a roll body in which a film having a knurled structure is formed on both ends. In the portions where the knurling structures 35 are formed at both ends in the width direction of the film 3A, the convex portions of the knurling structures 35 are in contact with the film 3B. Similarly, the convex portion of the knurled structure 35 of the film 3B is in contact with the film 3C. Therefore, in the film roll body 3, the both ends in which the knurled structure 35 is formed are wound up. On the other hand, in the center part of the film width direction, an air layer 9 is formed between the films to prevent the films from contacting each other. Therefore, even when the long film is wound into a roll shape, it is possible to prevent the films from sticking to each other.

The height of the unevenness of the knurled structure is, for example, about 2 to 30 μm, or about 3 to 30% of the thickness of the film. The width of the knurled structure forming region at both ends in the width direction of the film is, for example, about 5 to 20 mm. The shape and size of each concavity and convexity of the knurled structure, the arrangement pattern of the concavity and convexity, or the interval of the concavity and convexity are not particularly limited, but it is preferable to form the concavity and convexity in an area ratio of about 5 to 60% of the area where the knurled structure is formed.

From the viewpoint of securing strength and the like, the outer diameter of the core 1 is preferably about 70 to 400 mm. When the core 1 has a cylindrical shape, the thickness of the core 1 is preferably about 3 to 15 mm. The core 1 may also be cylindrical. The cylindrical core can also have a cavity inside.

The length of the core (the length in the winding axis direction) may be equal to or greater than the width of the long film (the width of the film winding body 3 ). When the length of the winding core 1 is longer than the width of the long film, the roll body 10 has protrusions respectively protruding from the winding core 1 from both sides of the film winding body 3 in the winding axis direction (x direction). The lengths of the protruding portions at both ends of the winding core 1 are preferably about 10-500 mm, respectively, and may also be 30-300 mm or 50-250 mm. The lengths of the protrusions at both ends may be the same or different.

The roll body 10 is supported from below the core 1 by placing the protruding portion on an appropriate stand or the like, so that the film roll body 3 is not subjected to pressure due to gravity, and the roll body can be left to be stored. An appropriate tape or the like may be wound around the protruding portion of the core 1, and the roller body 10 may be stored in a state where the roller body 10 is suspended from the top. In this way, the roll body can be stored and transported by applying a load to the protruding portion of the core without applying a load to the film winding body 3 . In addition, as described below, the protruding portion of the core 1 can also be used to wrap and fix the packing material.

The constituent material of the core 1 is not particularly limited as long as the strength can be ensured, and examples thereof include polyethylene resin, polypropylene resin, polyvinyl chloride resin, polyester resin, epoxy resin, phenol resin, melamine resin, Synthetic resins such as silicone resin, polyurethane resin, polycarbonate resin, ABS (acrylonitrile-butadiene-styrene, acrylonitrile-butadiene-styrene) resin; metal such as aluminum; fiber reinforced plastic (FRP), etc.

The method of winding the long film around the core 1 is not particularly limited, and a general winding method such as a constant tension method, a constant torque method, and a taper tension method may be used. The diameter of the roll body 3 of the long film is determined based on the outer diameter of the core 1 and the thickness and length of the film. Generally speaking, it is about 200-1200 mm, and may also be 300-1000 mm or 400-800 mm. In order to prevent the film from being unwound from the film roll 3 or the like, the outer peripheral portion of the long film may be temporarily fixed by an appropriate fixing member such as the adhesive tape 7 .

[Packing of Roller Body] A film roll packing body is formed by covering the roller body 10 with a packing material and packing. The film roll packing body of the present invention is characterized in that the film roll body is accommodated in a closed space formed by the packing material, and the closed space is in a pressurized state.

4 is a cross-sectional view of the film roll packing body 101 according to one embodiment of the present invention, and the entire film roll body 3 is accommodated in the pressurized airtight space 59 formed by the packing material 41 .

FIG. 5 is a schematic view of the packing material 41 before the roll body is accommodated. The packing material 41 is in the shape of a rectangular bag with one side 414 open and the other three sides sealed, and is configured so that the roller body 10 can be inserted into the bag through the opening 414 .

As the packing material 41, a film-shaped material having flexibility formed into a bag shape can be used. As the material of the packing material, polyolefin-based resins such as polyethylene, polypropylene, and polymethylpentene, polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate may, for example, be mentioned. Polyester-based resins such as ethylene glycol, fluorocarbon-based resins such as polytetrafluoroethylene, acrylic resins, nylon-based resins, vinyl chloride-based resins, vinylidene chloride-based resins, paper, and metals such as aluminum. From the viewpoint of durability and workability at the time of packing, a resin material is preferable. The packaging material may be obtained by vapor-depositing metal foil such as aluminum on a resin film, or may be a co-extrusion multilayer film.

It is preferable that the packing material 41 is not easily deformed when forming a pressurized airtight space. The thickness of the packing material 41 is preferably from 20 to 500 μm, more preferably from 30 to 250 μm, from the viewpoint of simultaneously achieving prevention of deformation during pressurization and workability. The thickness of the packing material 41 may be 50 μm or more or 100 μm or more.

The roll body 10 is inserted through the opening 414 of the bag-shaped packing material 41 , and the packing material 41 covers the entire film roll body 3 . If necessary, in a state where the portion of the side 412 opposite to the opening 434 is wound around the protruding portion of the core 1 , the fixing member 61 is wound from the outer periphery to fix the packing material 41 to the protruding portion of the core 1 . As the fixing member 61, a rubber tape, an adhesive tape, a band, or the like is used.

In a state in which the whole of the film winding body 3 is covered with the packing material 41 , the gas is sealed into the bag-shaped packing material 41 from the opening 414 , and the inside of the bag is in a pressurized state. The gas to be enclosed is not particularly limited as long as it does not degrade the film, but it is preferably air because it is inexpensive.

After the gas is enclosed, the wrapping sealing member 67 closes the opening 414 so that the gas does not leak from the opening 414 of the packing material 41 . As the sealing member 67, a rubber tape, an adhesive tape, a band, or the like is used. As a method of closing the opening, in addition to the method of winding the sealing member, a method of attaching an adhesive tape to a portion of the opening 414 of the packing material 41, and fusing the opening 414 of the packing material 41 after the gas is sealed can be exemplified. method. In order to more surely prevent the leakage of gas or the like from the opening, the opening may be closed by a plurality of methods.

In the pressurized state of the enclosed gas, by closing the opening 414, the pressurized airtight space 59 is formed by the packing material 41, and the film roll package 101 in which the film roll 3 is arranged is obtained. The pressure of the pressurized airtight space 59 only needs to be higher than normal pressure (0.1013 MPa), and may be 0.105 MPa or more, 0.11 MPa or more, 0.12 MPa or more, 0.13 MPa or more, 0.14 MPa or more, or 0.15 MPa or more. From the viewpoint of preventing deformation or breakage of the packing material 41, the pressure of the pressurized sealed space 59 is preferably 1 MPa or less, and may be 0.7 MPa or less, 0.5 MPa or less, 0.4 MPa or less, or 0.3 MPa or less.

By holding the rolled body 3 of the long film having the knurled structure 35 at both ends in the width direction in the pressurized airtight space 59 with the packing material 41, after a long period of time after the rolled body is formed, it is also The adhesion of the films to each other tends to be suppressed, and the change in the winding posture of the roll body over time can be prevented.

As shown in FIG. 3 , in the roll body of the film having the knurled structure, both ends where the knurled structure 35 is formed are tightly wound, and the winding is loose in the center portion in the width direction of the film. The winding posture of the winding body is likely to change due to deflection due to the self-weight of the film or environmental changes. When the film winding body is arranged in the pressurized closed space 59, the space (air layer) between the film and the film is also maintained in a pressurized state, and the gas is not easily leaked. Therefore, it is considered to maintain the space between the films and suppress the film. Changes in their sticking or winding postures to each other.

In the film roll packing body 101 shown in FIG. 4 , a portion of the closed side 412 of the bag-shaped packing material 41 is wound around the protruding portion of the core 1 and fixed by the fixing member 61 . In this way, by wrapping the fixing member 61 on the protruding portion of the core 1 and fixing the packing material, the packing material does not bulge excessively even when the packing material is sealed with gas. Therefore, after packing with the packing material, when performing the operation of placing on the pedestal so as to support the protruding part of the core 1 from below, and the operation of winding the tape around the protruding part of the core 1 and hoisting it, the Access to the protruding portion of the core 1 is easy, and workability is excellent.

In order to block the opening 414 of the packing material 41 and prevent the leakage of gas, the sealing member 67 must be tightly bound. On the other hand, the fixing member 61 for fixing the portion of the closed side 412 of the packing material 41 only needs to be able to maintain the pressurized state using the closed space of the packing material 41, and does not need to be tightly bound, as long as The protruding portion of the core 1 only needs to fix the sealing member.

The film roll packing body should just be enclosed in the pressurized airtight space formed with the packing material, and it is not limited to the form shown in FIG. 4. FIG. For example, since the side 412 of the packing material 41 is closed, even when the portion is not fixed by the fixing member 61, the packing material can be used to form a pressurized airtight space. Therefore, the film roll package may not include the fixing member 61 .

In the film roll packing body 102 shown in FIG. 6, the annular members 65 and 66 are wound from the outer periphery of the packing material 41 in the center part of the width direction. As the annular members 65 and 66, a rubber tape, an adhesive tape, a band, or the like is used. The ring-shaped member provided in the center part in the width direction may be one or three or more.

By wrapping the annular members 65 and 66 at the center portion of the film roll packaging body in the width direction, the packaging material does not bulge excessively when gas is enclosed in the packaging material. Therefore, the increase in the volume of the film roll package can be suppressed, and the handleability can be improved.

The annular members 65 and 66 may be wound around the outer periphery of the packing material 41 before the gas is enclosed in the packing material 41 . The annular members 65 and 66 may be wound after the packing material 41 is sealed with gas and sealed by the sealing member 67 so that the gas does not leak from the opening 414 . In the case of using a ring-shaped member whose circumference can be adjusted like a belt, the ring-shaped member can also be wound in advance, the circumference of the ring-shaped member can be reduced after the gas is sealed, and the packing material sealed with the gas is fastened. Can.

Even when the sealed space formed by the packing material 41 is not in a pressurized state at the time of gas sealing, the volume of the sealed space is reduced by winding the annular members 65 and 66 after the packing material 41 is sealed with gas. , the sealed space can be pressurized. The same applies to the case where the circumferential lengths of the annular members 65 and 66 are reduced and tightened after the packing material 41 is sealed with gas.

The sealing to block the opening of the packing material does not necessarily need to be performed on the protrusion of the core 1 . For example, like the film roll packing body 103 shown in FIG. 7 , the entire roll body 10 including the core 1 may be arranged in the pressurized airtight space 59 formed by the packing material 41 .

In the packing body 103 shown in FIG. 7 , the end of the bag-shaped packing material 41 is fastened by the sealing member 68 on the outer side of the core 1 , thereby closing the opening 414 of the packing material. As the sealing member 68, a rubber tape, an adhesive tape, a band, or the like is used. As described above, the method of closing the opening is not limited to wrapping the sealing member, and an adhesive tape or the like may be attached to the opening, or the opening of the packing material may be fused.

The packing material covering the roll body is not required to be in the shape of a bag as long as it can form a pressurized airtight space. For example, as shown in FIG. 8, the roll body may be packaged using a cylindrical packing material 43 having openings 432 and 434 at both ends. The cylindrical packing material is formed by forming a flexible film-like material into a cylindrical shape. One opening of the cylindrical packing material may be closed by fusing or the like to form a bag-shaped packing material.

FIG. 9 is a cross-sectional view of a film roll packing body 105 formed by packing the roll body 10 with a cylindrical packing material 43 . From the opening of the packing material 43 , the roller body 10 is inserted into the inside of the drum, and the packing material 43 covers the whole of the film winding body 3 . Then, in a state where a portion of one opening 432 is wound around the protruding portion of the core 1 , the sealing member 62 is wound from the outer periphery to fix the packing material 43 to the protruding portion of the core 1 . At this time, it fixed without a gap so that the gas enclosed in the packing material would not leak from the opening of the packing material.

Then, gas is sealed into the packing material 43 from the other opening 434 of the packing material, and the space formed by the packing material 43 is brought into a pressurized state. After the gas is enclosed, the sealing member 67 is wrapped around the sealing member 67 so that the gas does not leak from the opening 434 of the packing material 43 , and a film is sealed inside the pressurized airtight space 59 formed by the packing material 43 . The film roll packing body 105 of the winding body 3 . Also in the case of using the cylindrical packing material 43, similarly to the embodiment shown in FIG. 6, a fixing member may be wound around the center part of the width direction of a film roll packing body.

In the embodiment shown in FIG. 8 , in a state where the two openings 432 and 434 of the cylindrical packing material 43 are wound around the outer periphery of the protruding portions at both ends of the core 1, the coil is wound from the outer periphery. The sealing members 62, 67, thereby closing the openings 432, 434. It is also possible to seal the openings 432 and 434 of the packing material by tying the end of the packing material 43 with a sealing member on the outer side of the core 11, or by fusing or laminating the tape. Openings 432, 434 are closed.

[Storage and transportation of the roll body] As described above, the roll body 10 is stored in a state in which the film roll package of the film roll body is enclosed in the pressurized airtight space formed by the packing material. In addition, the roll body 10 may be conveyed in the state of a film roll package body.

The film roll package may be stored in a state where the protruding portion of the core 1 is placed on the pedestal. The roll body can be stored and transported by applying a load to the protruding portion of the core without applying a load to the film winding body 3 . When the core 1 has a cylindrical shape, it is also possible to place a load on the shaft by passing an appropriate shaft through the cavity portion of the core 1 and placing the shaft on the pedestal.

In the film roll packing body, since the film roll body is enclosed in the pressurized airtight space, even when it is stored in the state of the roll body for a long period of time, the gas between the layers of the film is not easily leaked. Therefore, the adhesion of the films and the change in the winding posture of the roll body are less likely to occur, and the storage stability is excellent. In addition, when the roller body is conveyed, the film winding body is also conveyed in a state of being sealed in the pressurized airtight space, thereby preventing the films from sticking to each other and the change in the winding posture of the roller body. [Example]

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the following examples.

On a core made of FRP with an inner diameter of 6 inches (153 mm), a thickness of 8 mm, and a width of 1400 mm, an acrylic transparent film with a thickness of 40 μm, a width of 1200 mm, and a length of 1000 m was taken up. Make the roll body. On both ends in the width direction of the acrylic transparent film, a knurled structure with a height of 9 μm was formed in a region with a width of 10 mm.

A polyethylene bag having a thickness of 100 μm and a size capable of wrapping the roll body was prepared. The roller body was inserted into the bag, and compressed air was sealed from the opening of the bag to set it in a pressurized state, then an adhesive tape was wound around the opening to block the opening so as not to leak air, and the film roll package of the example was produced. body. As a comparative sample, a packing body (Comparative Example 1) in which compressed air was not added to the inside of the bag but the opening was closed with a tape to form a closed space at normal pressure, and a roller body (Comparative Example 2) without packing were prepared.

The packing body of the example, the packing body of the comparative example 1, and the roller body of the comparative example 2 were placed on a metal pedestal so as to support the protruding part of the end of the core from below, and the temperature was 25 ℃. In a clean room with ℃ and relative humidity of 60%, visually check the winding posture every day.

In the package body of Comparative Example 1 and the roll body of Comparative Example 2, a change in the winding posture was observed after 5 days, and the film blocking was confirmed. The wrapping body of the example in which the roller body was sealed in the pressurized airtight space did not change the winding posture after 30 days, and showed excellent storage stability.

1: Core 3: Film winding body 3A, 3B, 3C: Film 7: Adhesive tape 9: Air layer 10: Roll body 35: Knurled structure 41, 43: Packing material 59: Pressurized closed space 61: Fixed Members 62, 67, 68: Sealing members 65, 66: Ring members 101, 102, 103, 105: Film roll packs 412: Edges 414, 432, 434: Openings

FIG. 1 is a perspective view showing the appearance of a roller body according to an embodiment. Fig. 2 is a cross-sectional view of a roller body according to an embodiment. Fig. 3 is a schematic view showing a laminated state of a film roll body having a knurled structure. Fig. 4 is a cross-sectional view of a film roll package according to an embodiment. Figure 5 is a schematic diagram of a bag-shaped packing material. Fig. 6 is a cross-sectional view of a film roll package according to an embodiment. Fig. 7 is a cross-sectional view of a film roll package according to an embodiment. Figure 8 is a schematic view of a cylindrical packing material. Fig. 9 is a cross-sectional view of a film roll package according to an embodiment.

1: roll core

3: film roll

10: Roller body

41: Packing material

59: Pressurized confined spaces

61: Fixed components

67: Sealing member

101: Film roll package body

Claims (7)

A film roll packing body comprising: a roll body provided with a core and a film winding body formed by winding a long film into a roll on the outer periphery of the core; and a packing material covering the above-mentioned The whole of the film roll body; The above-mentioned long film has a knurled structure at both ends in the width direction, and the above-mentioned film roll body is arranged in the pressurized closed space formed by the above-mentioned packing material. The film roll packing body according to claim 1, wherein the winding core protrudes from both ends in the width direction of the film winding body, and the packing material is wound and fixed to the protruding portion of the winding core. The film roll package according to claim 1, wherein the entirety of the above-mentioned core is disposed in the above-mentioned pressurized closed space. The film roll package according to any one of claims 1 to 3, wherein the above-mentioned elongated film is an optical film. A method for producing a film roll wrapping body, comprising wrapping a roll body including a core and a film roll body obtained by winding a long film into a roll on the outer periphery of the core with a packing material The manufacturing method of the film roll packing body, and the above-mentioned long film has a knurled structure at both ends in the width direction, and in a state where the roll body is covered with a packing material having at least one opening, it is borrowed from the above-mentioned opening The gas is enclosed in the space formed by the packing material, and the above-mentioned opening is closed to form a hermetic state, so that the film winding body is enclosed in the pressurized airtight space formed by the packing material. A method for storing a roll body, comprising a roll core and a roll body of a roll body formed by winding a long film into a roll on the outer periphery of the above-mentioned core, and wherein the above-mentioned long film is in a width direction. Both ends have a knurled structure, and in a state where the roll body is covered with a packing material having at least one opening, gas is sealed into the space formed by the packing material from the above-mentioned opening, and the above-mentioned opening is closed to form a The airtight state is produced in the film roll packaging body in which the film roll body is sealed in the pressurized airtight space formed by the packaging material, and the film roll packaging body is sealed in the pressurized airtight space. Next, the above-mentioned roller body is stored. The method for storing a roll body according to claim 6, wherein the core protrudes from both ends in the width direction of the film winding body, and the roll body is stored in a state where a load is applied to the protruding portion of the core.

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