TWI901748B - Film roll package and its manufacturing method, and roll storage method - Google Patents

Abstract

This invention provides a membrane roll bundle that does not easily change the winding posture of the membrane in the roll even during long-term storage. The roll (10) has a core (1) and a membrane roll bundle (3) formed by winding a strip of membrane into a roll around the core. The strip of membrane has a knurled structure at both ends in the width direction. The membrane roll bundle (101) has a bundle material covering the entire membrane roll bundle, and the membrane roll bundle is disposed within a pressurized and sealed space formed by the bundle material.

Description

Membrane roll packaging body and its manufacturing method, and storage method of the roll body.

This invention relates to a film roll bundle formed by bundling a long strip of film into a roll using a bundling material, and a method for manufacturing the same. Furthermore, this invention relates to a method for storing the roll.

Liquid crystal display devices or organic EL (electroluminescence) display devices use optical films such as polarizing plates and retardation plates. These optical films are provided as single layers or as laminates of multiple films. For example, generally, a polarizing plate is a laminate formed by laminating a transparent protective film with a suitable adhesive layer on one or both sides of a polarizing element.

These films are manufactured by winding a long strip of film around a core (also called a "core") to form a roll, which is then stored and transported in the form of a roll to the next process. For example, in the manufacturing process of a polarizing plate, the transparent protective film, which serves as the protective layer for the polarizing element, is temporarily wound into a roll as a single layer. In the next process, the transparent protective film is rolled out from the roll and bonded to the polarizing element.

To prevent contamination or deformation of the membrane from the time the roller is manufactured until its use in the next process, the roller is bundled with appropriate packaging material (see, for example, Patents 1 and 2). [Prior Art Documents] [Patent Documents]

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

[The problem that the invention aims to solve]

If long strips of film are stored as rollers for extended periods, their winding posture may change due to tightening or adhesion between the films. This is especially true when wide films are rolled into rolls, where bending due to the film's own weight can easily cause changes in winding posture. Changes in winding posture also occur when the rollers are stored in cleanrooms or other environments with minimal external environmental changes. Changes in the winding posture of the rollers degrade the film's quality; for example, when used as optical films, they can cause bright spots or defects in the displayed image.

In view of this problem, the purpose of this invention is to provide a film roll packaging body and a rolling method that do not easily cause changes in the winding posture of the film even under long-term storage conditions. [Technical Means for Solving the Problem]

One embodiment of this invention is a membrane roll packaging body, which consists of a packaging material covering a roller having a core and a strip of film wound into a roll around the core. The strip of film may also have knurled structures at both ends in the width direction. The strip of film may also be an optical film.

Within the membrane roll bundle, a membrane roll winding body is disposed within a pressurized, sealed space formed by the bundling material. In addition to the membrane roll winding body, the entire roller body, including the core, can also be sealed within the pressurized, sealed space formed by the bundling material.

By covering the roller with a packaging material having at least one opening, gas is sealed into the space formed by the packaging material through the opening, and the opening is closed to form a sealed state, thereby obtaining a package containing a film roll sealed in a pressurized and sealed space formed by the packaging material. As a packaging material with an opening, for example, a bag-shaped film with an opening on one side or a cylindrical film with openings at both ends can be used.

The core of the roller can also protrude from both ends of the film roll in the width direction. The roller can also be stored under load on the protruding portion of the core. Packaging material can also be wound and secured around the protruding portion of the core. [Effects of the Invention]

By utilizing the pressure-sealed space formed by the packaging material to arrange the film roll, the change in the winding posture of the roll can be suppressed, thus enabling long-term storage in the state of the roll.

[Roll] Figure 1 is a perspective view of the appearance of a roller in one embodiment, and Figure 2 is a cross-sectional view thereon. The roller 10 has a film roll 3 formed by winding a strip of film into a roll around the outer periphery of a cylindrical core 1.

The strip film wound on the core 1 in the roller 10 can be transparent or opaque. The strip film can also be an optical film used to form image display devices such as liquid crystal display devices or organic EL display devices. Examples of optical films include polarizing plates, polarizing elements, polarizing element protective films, retardation plates, anti-reflection films, transparent conductive films, and hard coating films.

Examples of membrane materials include cellulose resins, polyester resins, polyether ion resins, polyether ion resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, (meth)acrylic resins, cyclic polyolefin resins (norphine resins), polyaryl ester resins, polystyrene resins, and polyvinyl alcohol resins.

The thickness of the membrane is, for example, about 3–500 μm, but can also be 5–300 μm, 10–200 μm, 15–150 μm, or 20–100 μm. The width of the strip membrane (length in the x-direction in Figure 1) is about 200–7000 mm, but can also be 500–5000 mm or 1000–4000 mm. The length of the strip membrane is about 50–10000 m, but can also be 100–7000 m, 300–5000 m, or 500–4000 m.

Long strip films are formed, for example, by solution casting or melt casting. In solution casting, a resin solution is cast and coated onto the surface of a support. After a certain amount of solvent is removed from the cast film, it peels off from the support, thereby forming a film. Alternatively, the film after peeling off the support can be heated to remove residual solvent. In melt casting, molten resin is cast onto a support. After cooling and solidification on the support, it peels off from the support, thereby forming a film. In either solution casting or melt casting, the film after peeling off the support can also be stretched, coated, or cut into strips. When a flexible film is used as a support in solution casting, it can also be stretched, coated, or cut into strips before being peeled off from the support.

A film roll 3 is formed by winding a long strip of film along the circumference of the core 1 along its long side. To prevent the wound film from deviating or sticking together, it is preferable to rub the two ends of the long strip of film in the width direction before winding it onto the core 1, forming a rubbed structure 35. The rubbed structure is also known as embossing or knurling, consisting of tiny bumps and grooves.

Figure 3 is a schematic cross-sectional view showing the stacked state of the membranes in a winding body with knurled structures formed at both ends. In the portion of membrane 3A where the knurled structures 35 are formed at both ends in the width direction, the protrusions of the knurled structures 35 are in contact with membrane 3B. Similarly, the protrusions of the knurled structures 35 of membrane 3B are in contact with membrane 3C. Therefore, in the membrane winding body 3, the two ends with the knurled structures 35 are tightly wound. On the other hand, an air layer 9 is formed between the membranes at the center in the width direction to prevent the membranes from contacting each other. Therefore, even when a long strip of membrane is wound into a roll, adhesion between the membranes can be prevented.

The height of the undulations in the roving structure is, for example, about 2 to 30 μm, or about 3 to 30% of the film thickness. The width of the roving structure forming area at both ends of the film in the width direction is, for example, about 5 to 20 mm. The shape or size of each roving, the arrangement pattern of the rovings, or the spacing between the rovings are not particularly limited, but it is preferred that the rovings are formed in an area that accounts for about 5 to 60% of the area relative to the roving structure forming area.

From the perspective of ensuring strength, the outer diameter of the core 1 is preferably about 70 to 400 mm. When the core 1 is cylindrical, the thickness of the core 1 is preferably about 3 to 15 mm. The core 1 can also be cylindrical. The cylindrical core can also have an internal cavity.

The length of the core (length in the winding direction) only needs to be greater than or equal to the width of the elongated film (width of the film winding body 3). When the length of the core 1 is greater than the width of the elongated film, the roller body 10 has protruding portions of the core 1 extending from both sides of the film winding body 3 towards the winding axis (x direction). The lengths of the protruding portions at both ends of the core 1 are preferably approximately 10–500 mm, but can also be 30–300 mm or 50–250 mm. The lengths of the protruding portions at both ends can be the same or different.

By placing the protruding portion on a suitable pedestal or similar support, the roller 10 is supported from below the core 1, thus preventing the membrane roll 3 from being subjected to pressure due to gravity, allowing the roller to be stored statically. Alternatively, a suitable strap can be wound around the protruding portion of the core 1 to suspend the roller 10 from above. In this way, by bearing the load on the protruding portion of the core, but not on the membrane roll 3, the roller can be stored and transported. Furthermore, as described below, the protruding portion of the core 1 can also be used to wind and secure packaging materials.

The material used to construct the core 1 is not particularly limited, as long as it can ensure strength. Examples include synthetic resins such as polyethylene resin, polypropylene resin, polyvinyl chloride resin, polyester resin, epoxy resin, phenolic resin, melamine resin, silicone resin, polyurethane resin, polycarbonate resin, and ABS (acrylonitrile-butadiene-styrene) resin; metals such as aluminum; and fiber-reinforced plastics (FRP).

The method of winding the long strip film to the core 1 is not particularly limited; any general winding method such as constant tension, constant torque, or tapered tension can be used. The diameter of the long strip film winding body 3 is determined based on the outer diameter of the core 1, as well as the thickness and length of the film, and is generally around 200–1200 mm, but can also be 300–1000 mm or 400–800 mm. To prevent the film from unwinding from the film winding body 3, the outer periphery of the long strip film can be temporarily fixed by appropriate fixing components such as adhesive tape 7.

[Roll Bundling] A film roll bundle is formed by covering the roller 10 with bundling material and bundling it. The film roll bundle of the present invention is characterized in that a film roll is contained within a closed space formed by the bundling material, and the closed space is under pressure.

Figure 4 is a cross-sectional view of a film roll bundle 101 according to one embodiment of the present invention, in which the entire film roll bundle 3 is housed in a pressurized and sealed space 59 formed by the bundle material 41.

Figure 5 is a schematic diagram of the packaging material 41 before the roller is received. The packaging material 41 is a rectangular bag-shaped structure with one side 414 open and the other three sides sealed, and is configured to allow the roller 10 to be inserted into the bag through the opening 414.

As the bundling material 41, a flexible film-like material formed into a bag shape can be used. Examples of materials for the bundling material include polyethylene, polypropylene, polymethylpentene and other polyolefin resins; polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate and other polyester resins; polytetrafluoroethylene and other fluorocarbon resins; acrylic resins; nylon resins; vinyl chloride resins; vinylidene chloride resins; paper; aluminum and other metals. From the viewpoint of durability or ease of handling during bundling, resin materials are preferred. The bundling material can be formed by vapor-plating metal foil such as aluminum onto a resin film, or it can be a co-extruded multilayer film.

The strapping material 41 is preferably resistant to deformation when forming a pressurized, sealed space. From the viewpoint of simultaneously preventing deformation under pressure and ensuring operability, the thickness of the strapping material 41 is preferably 20–500 μm, more preferably 30–250 μm. The thickness of the strapping material 41 may also be 50 μm or more, or 100 μm or more.

The package 41 is inserted into the roller 10 through the opening 414 of the bag-shaped packaging material 41, forming a whole package 41 covering the film winding body 3. If necessary, with the portion of the side 412 opposite to the opening 434 wound around the protruding portion of the core 1, the packaging material 41 is fixed to the protruding portion of the core 1 by winding it around the fixing member 61 from the outer periphery. The fixing member 61 can be rubber tape, adhesive tape, or cable ties.

With the entire film roll 3 covered by the packaging material 41, gas is sealed into the bag-shaped packaging material 41 through the opening 414, thus pressurizing the inside of the bag. The sealed gas is not particularly limited as long as it does not degrade the film; air is preferred due to its low cost.

After the gas is sealed, the sealing member 67 is wound around to seal the opening 414 of the packaging material 41 so that the gas does not leak out from the opening. The sealing member 67 may be made of rubber tape, adhesive tape, or cable ties. In addition to winding the sealing member, other methods for sealing the opening include attaching adhesive tape to the opening 414 of the packaging material 41, and fusing the opening 414 of the packaging material 41 after the gas is sealed. To more reliably prevent gas leakage from the opening, multiple methods may be used to seal the opening.

Under pressurized conditions with enclosed gas, the opening 414 is sealed, and a pressurized sealed space 59 is formed by the packaging material 41, resulting in a membrane roll bundle 101 in which the membrane roll winding 3 is disposed. The pressure of the pressurized sealed space 59 only needs to be higher than atmospheric pressure (0.1013 MPa), but it can also be 0.105 MPa or higher, 0.11 MPa or higher, 0.12 MPa or higher, 0.13 MPa or higher, 0.14 MPa or higher, or 0.15 MPa or higher. From the viewpoint of preventing deformation or damage to the packaging material 41, the pressure of the pressurized sealed space 59 is preferably 1 MPa or lower, but it can also be 0.7 MPa or lower, 0.5 MPa or lower, 0.4 MPa or lower, or 0.3 MPa or lower.

By using a wrapping material 41 to hold the long strip film with a ribbed structure 35 at both ends in the width direction within a pressurized and sealed space 59, the tendency for the film to stick together is suppressed after a long period of time after the roll is formed, thus preventing changes in the winding posture of the roll over time.

As shown in Figure 3, in a membrane winding with a knurled structure, the two ends with the knurled structure 35 are wound tightly, while the winding is looser in the central part of the membrane width direction. Therefore, due to the membrane's own weight, bending, or environmental changes, the winding posture of the winding body is prone to change. When the membrane winding body is placed in a pressurized sealed space 59, the space between the membranes (air layer) is also maintained under pressure, and gas is not easy to leak out. Therefore, it is considered to maintain the space between the membranes to suppress the adhesion between the membranes or changes in the winding posture.

In the film roll bundle 101 shown in Figure 4, the closed edge 412 of the bag-shaped bundle material 41 is wrapped around the protruding part of the core 1 and fixed by the fixing member 61. In this way, the bundle material is fixed by wrapping the protruding part of the core 1 around the fixing member 61, and the bundle material will not bulge excessively when gas is sealed into the bundle material. Therefore, after using the bundle material for bundling, when performing operations such as placing the core 1 on the pedestal by supporting the protruding part from below, or lifting the core 1 by wrapping the protruding part of the core 1, access to the protruding part of the core 1 is easy, and the workability is excellent.

In order to block the opening 414 of the packaging material 41 and prevent gas leakage, the sealing component 67 must be tightly bound. On the other hand, the fixing component 61 used to fix the closed edge 412 of the packaging material 41 only needs to be able to maintain the pressurized state of the sealed space of the packaging material 41, and does not need to be tightly bound. It is sufficient to fix the sealing component to the protruding part of the core 1.

The membrane roll bundle can be made by simply sealing the membrane roll within a pressurized, sealed space formed by the bundling material, and is not limited to the shape shown in Figure 4. For example, since the edge 412 of the bundling material 41 is closed, a pressurized, sealed space can be formed using the bundling material even if that part is not fixed by the fixing member 61. Therefore, the membrane roll bundle may not have the fixing member 61.

In the film roll bundle 102 shown in Figure 6, annular components 65 and 66 are wound around the outer periphery of the bundle material 41 at the center in the width direction. The annular components 65 and 66 are made of rubber tape, adhesive tape, or strapping. There may be one or more annular components located at the center in the width direction.

By using the annular components 65 and 66 wound around the central portion of the membrane roll bundle in the width direction, the bundle material will not bulge excessively when gas is sealed into it. Therefore, the increase in the volume of the membrane roll bundle body is suppressed, and the processing efficiency can be improved.

The annular components 65 and 66 can also be wound around the outer periphery of the bundling material 41 before the gas is sealed into it. Alternatively, the annular components 65 and 66 can be wound around the bundling material 41 after the gas is sealed by the sealing component 67 in a way that prevents the gas from leaking out from the opening 414. When using an annular component with an adjustable circumference, such as a strap, the annular component can be wound in advance, and after the gas is sealed, the circumference of the annular component can be reduced to secure the bundling material containing the gas.

Even when the sealed space formed by the packaging material 41 is not pressurized during gas sealing, the volume of the sealed space can be reduced by wrapping the packaging material 41 with the ring-shaped components 65 and 66 after the gas is sealed in, thus pressurizing the sealed space. The same applies when the circumference of the ring-shaped components 65 and 66 is reduced and tightened after the gas is sealed in the packaging material 41.

The seal used to block the opening of the packaging material does not necessarily need to be made at the protrusion of the core 1. For example, as shown in the film roll packaging body 103 of FIG7, the entire roller 10, which also includes the core 1, can be arranged in the pressurized sealed space 59 formed by the packaging material 41.

In the bundle 103 shown in Figure 7, the end of the bag-shaped bundle 41 is tightly bound by a sealing member 68 on the outer side of the core 1, thereby sealing the opening 414 of the bundle. The sealing member 68 can be rubber tape, adhesive tape, or cable ties. As mentioned above, the method of sealing the opening is not limited to wrapping the sealing member; adhesive tape can be attached to the opening, or the opening of the bundle can be fused together.

The packaging material covering the roller only needs to be able to form a pressurized, sealed space; it does not need to be bag-shaped. For example, as shown in Figure 8, a cylindrical packaging material 43 with openings 432 and 434 at both ends can also be used to bundle the roller. The cylindrical packaging material is formed by shaping a flexible, film-like material into a cylindrical shape. Alternatively, one opening of the cylindrical packaging material can be sealed by welding or other means to form a bag-shaped packaging material.

Figure 9 is a cross-sectional view of a film roll bundle 105 formed by bundling the roller 10 with a cylindrical bundling material 43. The roller 10 is inserted into the inside of the roll through the opening of the bundling material 43, forming a state where the bundling material 43 covers the entire film roll winding 3. Then, with one opening 432 wrapped around the protruding portion of the core 1, the bundling material 43 is fixed to the protruding portion of the core 1 by wrapping the sealing member 62 from the outer periphery. At this time, the gas sealed into the bundling material is fixed without gaps in a way that prevents leakage from the opening of the bundling material.

Then, gas is sealed into the packaging material 43 through another opening 434, pressurizing the space formed by the packaging material 43. After sealing the gas, the gas is sealed by winding the sealing member 67 in a way that prevents the gas from leaking out from the opening 434 of the packaging material 43, thus obtaining a film roll packaging body 105 with the film roll wrapping body 3 sealed inside the pressurized sealed space 59 formed by the packaging material 43. When using a cylindrical packaging material 43, the same implementation method is used as shown in FIG. 6, and the fixing member can also be wound around the center of the width direction of the film roll packaging body.

In the embodiment shown in Figure 8, with the two openings 432 and 434 of the cylindrical packaging material 43 wrapped around the outer periphery of the protruding portions at both ends of the core 1, the sealing components 62 and 67 are wrapped around the outer periphery to close the openings 432 and 434. Alternatively, the openings 432 and 434 can be closed by tightly binding the ends of the packaging material 43 with the sealing components on the outer side of the core 11. The openings 432 and 434 can also be closed by methods such as fusion or tape bonding.

[Storage and Transport of Rollers] As described above, rollers 10 are stored in a state where they are sealed within a pressurized, enclosed space formed by the packaging material as a bundle of film rolls containing the film rolls. Rollers 10 can also be transported in the state of a bundle of film rolls.

The membrane roll bundle can also store the protruding part of the core 1 on the pedestal. By bearing the load on the protruding part of the core, but not on the membrane roll winding 3, the roller can be stored and transported. When the core 1 is cylindrical, the axle load can also be placed on the pedestal by passing a suitable shaft through the cavity of the core 1, thus bearing the axle load.

Within the membrane roll bundle, because the membrane roll is sealed within a pressurized, sealed space, even during long-term storage as a roller, gas between the membrane layers is unlikely to leak out. Therefore, membrane adhesion and changes in the roller winding posture are less likely to occur, resulting in excellent storage stability. Furthermore, during roller transport, by conveying the roll in a bundle sealed within a pressurized, sealed space, adhesion between membranes and changes in the roller winding posture can be suppressed. [Example]

The invention will be described in more detail below with reference to embodiments, but the invention is not limited to the examples below.

A roller is made by winding an acrylic transparent film with a thickness of 40 μm, a width of 1200 mm, and a length of 1000 m from an FRP core with an inner diameter of 6 inches (153 mm), a thickness of 8 mm, and a width of 1400 mm. A 9 μm high rubbing structure is formed in a 10 mm wide area at both ends of the acrylic transparent film in the width direction.

Prepare a polyethylene bag with a thickness of 100 μm that can wrap the aforementioned roller. Insert the roller into the bag, seal the opening with compressed air to a pressurized state, and then wrap adhesive tape around the opening to seal it in a way that prevents air leakage, thus producing the film roll wrapping body of the embodiment. As a comparative sample, prepare a wrapping body (Comparative Example 1) in which compressed air is not added to the inside of the bag and the opening is sealed with tape to form a closed space at normal pressure, and a roller without wrapping (Comparative Example 2).

The bundle of the embodiment, the bundle of Comparative Example 1, and the roller of Comparative Example 2 were placed on a metal pedestal in such a way that the protruding part of the end of the core was supported from below. They were placed in a clean room with a temperature of 25°C and a relative humidity of 60%, and the winding posture was visually confirmed every day.

After 5 days, changes in the winding posture of the bundle in Comparative Example 1 and the roller in Comparative Example 2 were observed, confirming membrane adhesion. The bundle containing the roller in the embodiment, sealed in a pressurized sealed space, did not change its winding posture after 30 days, demonstrating excellent storage stability.

1: Core roll; 3: Membrane roll winding; 3A, 3B, 3C: Membrane; 7: Adhesive tape; 9: Air layer; 10: Roller; 35: Rubberized structure; 41, 43: Bundling material; 59: Pressurized sealed space; 61: Fixing component; 62, 67, 68: Sealing component; 65, 66: Annular component; 101, 102, 103, 105: Membrane roll bundle; 412: Edge; 414, 432, 434: Opening.

Figure 1 is a perspective view of the roller body according to one embodiment. Figure 2 is a cross-sectional view of the roller body according to one embodiment. Figure 3 is a schematic diagram showing the stacked state of a membrane roll with a knurled structure. Figure 4 is a cross-sectional view of a membrane roll bundle according to one embodiment. Figure 5 is a schematic diagram of a bag-shaped bundle. Figure 6 is a cross-sectional view of a membrane roll bundle according to one embodiment. Figure 7 is a cross-sectional view of a membrane roll bundle according to one embodiment. Figure 8 is a schematic diagram of a cylindrical bundle. Figure 9 is a cross-sectional view of a membrane roll bundle according to one embodiment.

1: Core

3: Membrane roll winding

10: Roller

41: Packaging Materials

59: Pressurized enclosed space

61: Fixed Components

67: Sealing Components

101: Membrane roll packaging body

Claims (12)

A membrane roll packaging body comprises: a roller having a core and a membrane roll formed by winding a strip of film into a roll around the core; and a packaging material covering the entire membrane roll; the strip of film having a knurled structure at both ends in the width direction, and the membrane roll being disposed within a pressurized and sealed space formed by the packaging material. As in claim 1, the film roll bundle contains a core that protrudes from both ends of the film roll in the width direction, and the bundle material is wound and fixed around the protruding portion of the core. The film roll bundle of claim 1, wherein the entire core is disposed within the pressurized sealed space. The film roll package of any of the claims 1 to 3, wherein the above-mentioned strip film is an optical film. For example, in any of claims 1 to 3, a film roll bundle has an annular component that is wound and tightly secured around the outer periphery of the bundle at the center of the width direction of the film roll bundle, thereby pressurizing the space formed by the bundle. A method for manufacturing a membrane roll bundle involves using a bundling material to bundle a membrane roll bundle consisting of a core and a roll of elongated film wound around the core. The elongated film has ribbed structures at both ends in the width direction. With the roll covered by a bundling material having at least one opening, gas is sealed into the space formed by the bundling material through the opening. By closing the opening to form a sealed state, the membrane roll bundle is sealed within the pressurized sealed space formed by the bundling material. As in the method of manufacturing the film roll bundle of claim 6, an annular component is wound and secured around the outer periphery of the bundle material at the central portion of the width direction of the film roll bundle, thereby pressurizing the space formed by the bundle material. The method for manufacturing a film roll bundle, as described in claim 7, involves sealing the opening to form a closed state, then wrapping and securing the annular component around the outer periphery of the bundle material. As in the manufacturing method of the film roll bundle of claim 7, the circumference of the aforementioned annular component can be adjusted. After the annular component is rolled around the outer periphery of the bundle material, gas is sealed into the space formed by the bundle material through the opening, and the opening is closed to make it a sealed state. Subsequently, the circumference of the aforementioned annular component is reduced to secure the bundle material containing the gas. A method for storing a roller comprises a core and a film roll formed by winding a strip of film around the core. The strip of film has a knurled structure at both ends in the width direction. The roller is covered with a packaging material having at least one opening. Gas is sealed into the space formed by the packaging material through the opening. The opening is then closed to form a sealed state, thus creating a film roll package containing the film roll within a pressurized and sealed space formed by the packaging material. The roller is stored in the pressurized and sealed space containing the film roll. The method for storing the roller body as described in claim 10, wherein the core protrudes from both ends of the film roll in the width direction, and the roller body is stored under a load on the protruding portion of the core. The method for storing the roller body as described in claim 10 or 11 involves wrapping and securing an annular component around the outer periphery of the packaging material at the central portion of the width direction of the aforementioned film roll, thereby pressurizing the space formed by the packaging material and storing the roller body while the annular component is wrapped around it.