WO2018100896A1

WO2018100896A1 - Coating film roll body

Info

Publication number: WO2018100896A1
Application number: PCT/JP2017/036931
Authority: WO
Inventors: 岳士井上; 田中　博文; 崇南條; 尚行最上
Original assignee: コニカミノルタ株式会社
Priority date: 2016-12-01
Filing date: 2017-10-12
Publication date: 2018-06-07
Also published as: JPWO2018100896A1; CN110023207A; KR20190076019A; JP7159869B2; KR102183525B1

Abstract

A coating film roll body (2) is provided with a film roll (2') and a heat-insulating member (2P). The film roll (2') is a wound body in which an elongated optical film (10) comprising a thermoplastic resin is wound around a winding core (2a). The heat-insulating members (2P) have heat-insulating properties and cover a part of the film roll (2'). The optical film (10) has concavo-convex embossed parts (11) in one or more locations in the width direction along the winding core (2a). The heat-insulating member (2P) is provided so as to cover: the side surface parts (2c) facing each other in the width direction of the film roll (2'), the outer peripheral surface (2b₁) of the film roll (2') interposed therebetween; and the embossed parts (11) of the optical film (10).

Description

Covered film roll body

The present invention relates to a coated film roll body in which a part of a film roll is covered with a heat insulating member.

In recent years, with the thinning of display devices, there has been a demand for thinner optical films mounted on polarizing plates. A thin optical film is formed into a long film, and then wound into a roll to form a film roll. However, since it is a thin film, it is blocked (attached between laminated films) or wound by weight. Shape deformation tends to occur. For this reason, the shape of the embossing (uneven portion) formed at the wide end of the optical film is devised, or the optical film winding method is straight winding (the optical film is wound with the wide end aligned. ) To oscillate winding (a method of winding an optical film while swinging the width end portion in the direction of the core).

The film roll is packed with packing materials and transported or stored in a warehouse. At this time, wrinkles may occur in the film roll due to thermal expansion due to a change in ambient temperature. Thus, for example, in Patent Document 1, at least a part of the surface of a film roll obtained by winding a laminated film obtained by laminating an optical film and a protective film in a roll shape is covered with a heat insulating sheet. The generation of wrinkles due to the thermal expansion of the material is suppressed. In addition, in patent document 1, it does not form an embossed part in the both ends of the width direction of an optical film, but by laminating | stacking and winding an optical film and a protective film, it is from appropriate winding and a film roll. It can be pulled out.

JP 2010-221625 A (refer to claim 1, paragraphs [0003], [0004], [0006], [0009], [0015], FIG. 4, etc.)

By the way, in the film forming process, when the optical film having an embossed portion formed on the surface is wound up and the package body in which the wound film roll is packed is transported, the film roll is taken out from the package body and the optical film is fed out. It has been found that a so-called landslide (cylindrical) failure occurs in which the optical film is fed while sliding in the winding core direction (width direction) perpendicular to the feeding direction. A landslide-like failure is not desirable because, for example, a positional shift or the like occurs in the bonding of the optical film and the polarizer in the polarizing plate processing step. The reason for the occurrence of the landslide-like failure is estimated by the inventor as follows.

As described above, an uneven embossed portion for preventing blocking is formed on the surface in the width direction of the optical film. When a package roll is transported or carried in after transport, if the temperature rises suddenly on the film roll due to external heat, the embossed part (particularly the convex part) expands between the films stacked vertically. Is crushed, that is, the unevenness difference is reduced (the surface roughness of the embossed portion is reduced). For this reason, the grip property (regulatory force) in the embossed portion is reduced, and as a result, a landslide-like failure occurs in the next process as described above.

However, conventionally, no countermeasure has been proposed for reducing landslide-like failure when feeding an optical film having an embossed portion.

In addition, the film roll currently examined by patent document 1 does not form the embossed part in the surface of an optical film, The phenomenon itself which the unevenness | corrugation difference of an embossed part becomes small by thermal expansion does not occur. For this reason, in patent document 1, the landslide-like failure resulting from the thermal expansion of an embossed part is not examined naturally.

The present invention has been made in order to solve the above-described problem, and an object of the present invention is to provide a coated film roll that can reduce the occurrence of a landslide-like failure when an optical film having an embossed portion is fed out. To provide a body.

The above object of the present invention is achieved by the following configuration.

That is, the coated film roll body according to one aspect of the present invention has a film roll that is a wound body in which a long optical film made of a thermoplastic resin is wound around a core, and has heat insulation, A heat insulating member that covers a part of the film roll, the optical film has an uneven embossed portion at one or more positions in the width direction along the core, and the heat insulating member It is provided so that the side part which opposes in the said width direction via the outer peripheral surface of a film roll, and the said embossing part of the said optical film may be covered.

According to the above configuration, it is possible to reduce the occurrence of a landslide-like failure caused by thermal expansion of the embossed part when the optical film having the embossed part is unwound.

It is a perspective view which shows the structure of the outline of the package body which packages the covering film roll body which concerns on embodiment of this invention. It is a perspective view which shows the said coating film roll body and a mount frame. It is a disassembled perspective view of the said mount. It is a perspective view of the film roll contained in the said coating film roll body, and the said coating film roll body. It is sectional drawing of the film roll by which the optical film was wound up by the straight winding. It is sectional drawing of the film roll by which the optical film was wound up by oscillate winding. It is sectional drawing which shows the structure of the foam cushion sheet which is an example of the heat insulation member which the said coating film roll body has. It is a perspective view which shows an example of the manufacturing method of the said coating film roll body. It is a perspective view which shows the other example of the manufacturing method of the said covering film roll body. It is a perspective view which shows the other structure of the said coating film roll body. It is a perspective view which shows the other structure of the said package.

An embodiment of the present invention will be described below with reference to the drawings. In this specification, when the numerical range is expressed as A to B, the numerical value range includes the values of the lower limit A and the upper limit B. In addition, in this invention, heat insulation includes the effect which blocks | prevents heat conduction and shields heat radiation and heat radiation.

[Composition of film roll packaging]
FIG. 1 is a perspective view showing a schematic configuration of a film roll packaging body (hereinafter also simply referred to as a packaging body) 1 of the present embodiment. The package 1 includes a covering film roll body 2, a mount 3, and a covering member 4. In FIG. 1, the covering member 4 is hatched for the purpose of clarifying the covering member 4 (in other drawings, hatching is indicated as necessary). FIG. 2 is a perspective view showing the covering film roll body 2 and the gantry 3 before packaging with the covering member 4. Details of the coated film roll body 2 will be described later.

FIG. 3 is an exploded perspective view of the gantry 3. The gantry 3 can hold the coating film roll body 2 inside the core film 2a so that the outermost layer 2b of the film roll 2 ′ of the coating film roll body 2 is not in contact with the others. It is configured as follows. Specifically, the gantry 3 includes a frame body 31 and two support beams 32. For convenience of explanation below, when the film roll 2 is placed (accommodated) on the gantry 3 so that the core 2a is horizontal, the side that supports the core 2a is “down”, “downward”, or “ The lower side is referred to as “upper”, “upper” or “upper”. Therefore, the vertical direction is the same as the vertical direction. A direction perpendicular to the vertical direction is also referred to as a side.

The frame body 31 is a frame having a substantially rectangular parallelepiped shape as a whole (see FIG. 2), and is formed in a size that can accommodate the covering film roll body 2 without protruding to the outside. The frame body 31 includes an upper frame portion 31a, a lower frame portion 31b, and four support columns 31c. The upper frame part 31a and the lower frame part 31b are frame-shaped frames along the long and short sides of a rectangle. The upper frame part 31a is positioned above the holding film roll body 2 to be held, and the lower frame part 31b is positioned below the holding film roll body 2 to be held. The corners (rectangular vertices) of the upper frame portion 31a and the corners (rectangular vertices) of the lower frame portion 31b are connected to each other via a support column 31c. That is, each column 31c connects the upper frame portion 31a and the lower frame portion 31b in the vertical direction. Thus, a substantially rectangular parallelepiped frame (frame body 31) is configured.

One of the two support beams 32 is positioned horizontally (perpendicular to the column 31c) between the two columns 31c that connect the short sides of the upper frame unit 31a and the lower frame unit 31b. The two struts 31c are connected. Similarly, the other of the two support beams 32 is horizontally between the two columns 31c connecting the remaining short sides of the upper frame portion 31a and the lower frame portion 31b (perpendicular to the column 31c). The remaining two columns 31c are connected so as to be positioned.

The two support beams 32 are formed with recesses 32a cut into a semi-cylindrical shape so that the upper frame portion 31a side opens. As shown in FIG. 2, both ends of the core 2a of the covering film roll body 2 enter the recesses 32a of the respective support beams 32, so that the core 2a is fixed to the support beams 32 and the covering film roll body 2 is stable. Will be supported. A pivotable lid member is provided on the support beam 32, and after the core 2a enters the recess 32a, the recess 32a is covered with a lid member to prevent the core 2a from falling off the recess 32a. Also good.

Note that the gantry 3 is not limited to the above configuration and shape. For example, the gantry 3 may be configured to be detachable by separating (detaching) part of the frame body 31 and the support beam 32. Further, the gantry 3 may have a shape in which a part of the rectangular parallelepiped shape is rounded.

The covering member 4 shown in FIG. 1 is a member that covers the mount 3 to cover the covering film roll body 2 inside the mount 3 in a non-contact manner with the outermost layer 2b. Since the gantry 3 is a substantially rectangular parallelepiped frame, the covering member 4 covering the gantry 3 has a shape along the outer surface of the cuboid. That is, the covering member 4 includes an upper surface portion 4a and a lower surface portion 4b that face each other with the covering film roll body 2 interposed therebetween, and four side surface portions 4c. The upper surface portion 4a is a surface that covers the upper frame portion 31a (see FIG. 3) of the frame body 31 and is formed in a substantially rectangular shape with the side edges positioned along the upper frame portion 31a. The lower surface portion 4b is a surface that covers the lower frame portion 31b (see FIG. 3) of the frame body 31 and is formed in a substantially rectangular shape with the side edges positioned along the lower frame portion 31b. The four side surface parts 4c connect the outer edges (each side) of the substantially rectangular upper surface part 4a and lower surface part 4b, and are formed in a quadrangular shape.

The covering member 4 is composed of a transparent or translucent sheet. For example, a transparent resin sheet manufactured using polyvinylidene chloride (PVDC), polyvinyl chloride (PVC), low density polyethylene (PE, LDPE), etc. as a raw material, or a resin colored with pigments, dyes, colorants, etc. The covering member 4 can be made of a transparent sheet.

[Details of coated film roll]
Next, the detail of the covering film roll body 2 is demonstrated. FIG. 4 is a perspective view of the film roll 2 ′ included in the coated film roll body 2 and the coated film roll body 2. The covering film roll body 2 includes the film roll 2 ′ and the heat insulating member 2P. In FIG. 4, the heat insulating member 2 </ b> P is hatched for the purpose of clarifying the heat insulating member 2 </ b> P (shown with hatching as necessary in other drawings).

The film roll 2 ′ is a wound body obtained by winding a long optical film 10 made of a thermoplastic resin around the core 2 a. As the thermoplastic resin, for example, cellulose ester resin, cycloolefin resin, polyimide resin, polyarylate resin, or the like can be used.

The long optical film 10 is formed by, for example, a solution casting film forming method. In the solution casting film forming method, a dope containing a resin and a solvent is cast from a casting die onto a traveling support and dried on the support to form a casting film. Then, the cast film is peeled, stretched and dried to form a film, and both end portions in the width direction of the film are cut (trimmed), and then embossing is performed on both end portions in the width direction of the remaining film. In embossing, pressing an embossing roll with irregularities engraved on the peripheral surface against both ends of the film causes the irregularities to be transferred to the film to form an embossed portion. The film thus formed is finally wound on a core to become a roll-shaped optical film (film roll). In addition, the film forming method of the optical film 10 is not necessarily limited to the above solution casting film forming method, and may be another film forming method (for example, melt casting film forming method).

5 and FIG. 6 are cross-sectional views of the film roll 2 ′. FIG. 5 shows a cross-sectional view of the film roll 2 ′ in which the optical film 10 is wound by straight winding, and FIG. Shows a cross-sectional view of a film roll 2 ′ wound up by oscillating winding. Note that straight winding is a method of winding the optical film 10 in the width direction without causing the optical film 10 to swing in the width direction, and oscillating winding is a method of swinging the optical film 10 in the width direction. It is a method of winding while. Here, the oscillation width, that is, the movement amount of the optical film 10 by the oscillation in the width direction is set to W1 (mm).

As shown in these drawings, uneven embossed portions 11 are formed at both ends of the optical film 10 in the width direction (the direction along the core) by the embossing described above. Thereby, it becomes possible to suppress sticking (blocking) of the upper and lower optical films 10 in the film roll 2 ′ and displacement of the optical film 10 in the core direction. For example, the width W of the embossed part 11 may be 5% of the width W0 of the optical film 10, but is not limited to this value. Each of the widths W and W0 is a length (mm) along the width direction of the film. In addition, the embossed part 11 should just be formed in one place somewhere in the width direction of the optical film 10, and the number thereof is not particularly limited (although it may be two or more), Usually, it is formed in two places on both ends in the width direction.

The heat insulating member 2P is a member having heat insulating properties and in contact with the film roll 2 'to cover a part of the film roll 2'. As such a heat insulating member 2P, a member that is opaque and absorbs or blocks light and heat can be used. For example, a metal sheet such as aluminum foil, a paper sheet including cardboard-like cardboard or thin wrapping paper, a resin sheet in which a color pigment (for example, carbon black) is mixed in transparent resin, cloth, wood, or the like is used as the heat insulating member 2P. be able to.

Further, as the heat insulating member 2P, for example, a bubble cushioning sheet 21 shown in FIG. 7 can be used. The bubble cushioning sheet 21 is formed by bonding _two polyethylene sheets 21a ₁ and 21a _{2 so} that innumerable bubbles (air layers) 21a ₃ are formed therebetween, and buffering by the presence of the bubbles 21a ₃ It is a sheet that has a character.

Furthermore, the heat insulating member 2P can be configured by appropriately combining the above-described materials. For example, the heat insulating member 2P can be configured by bonding a bubble buffer sheet and a metal sheet, and the heat insulating member 2P can be configured by bonding a resin sheet and a metal sheet.

In this embodiment, as shown in FIG. 4, the heat insulating member 2 </ b> P is provided so as to cover the side surface portion 2 c of the film roll 2 ′ and the embossed portion 11 of the optical film 10. Here, the side surface portion 2c of the film roll 2 ′ refers to two surfaces facing each other in the width direction via the outer peripheral surface 2b ₁ of the film roll 2 ′. Further, the outer peripheral surface 2b ₁ of the film roll 2 ′ is a surface that covers the core 2a along the circumferential direction, and is a surface having a circular shape in a cross section perpendicular to the core 2a, and the outermost layer 2b. Formed by the surface. When the optical film 10 is wound by straight winding, the side surface portion 2c is substantially flat. However, when the optical film 10 is wound by oscillating winding, the side surface portion 2c is a surface having irregularities. It becomes.

When the optical film 10 is wound by straight winding, as shown in FIG. 5, the embossed portions 11 of each layer are almost stacked with a width W. Therefore, the width of the heat insulating member 2P covering the embossed portions 11 of each layer (film The width in the winding core direction on the outer peripheral surface 2b ₁ of the roll 2 ′ may be at least W. On the other hand, when the optical film 10 is wound by oscillating winding, the embossed portions 11 of each layer are stacked while being swung with the oscillating width W1, and therefore, in order to cover all the embossed portions 11 of each layer with the heat insulating member 2P, (core width of on the outer peripheral surface 2b ₁ of the film roll 2 ') width of member 2P is required by at least (W + W1).

The heat insulating member 2P may cover the entire surface of the core 2a when covering the side surface 2c and the embossed portion 11, or may cover a part of the core 2a. It may be covered without including the core 2a (the heat insulating member 2P may have a hole through which the core 2a passes).

FIG. 8 is a perspective view showing an example of a method for manufacturing the coated film roll body 2. For example, when a sheet-like member (bubble buffer sheet 21, metal sheet, resin sheet, or the like) is used as the heat insulating member 2P having heat insulating properties, the embossed portion 11 of the film roll 2 ′ is covered as shown in FIG. After the heat insulating member 2P is wound around the outer peripheral surface 2b ₁ of the film roll 2 ′ and fixed with an adhesive or tape, the end portion of the heat insulating member 2P protruding from the film roll 2 ′ is covered so as to cover the side surface portion 2c. The coated film roll body 2 in which the side surface portion 2c and the embossed portion 11 are covered with the heat insulating member 2P can be obtained by bundling and fixing around the core 2a with an overband (not shown) or the like.

FIG. 9 is a perspective view showing another example of the manufacturing method of the coated film roll body 2. If the heat insulating member 2P is configured by bending cardboard or the like in advance so that it can be fitted into the end of the film roll 2 '(cover shape), the core direction of the film roll 2' By fitting the heat insulating member 2P from both, the coated film roll body 2 in which the side surface portion 2c and the embossed portion 11 are covered with the heat insulating member 2P can be obtained.

When the covering film roll body 2 is obtained as described above, the core 2a of the covering film roll body 2 is placed and fixed in the recess 32a of the support beam 32 of the gantry 3 as shown in FIG. By covering the periphery of the gantry 3 with a covering member 4 (for example, a transparent sheet) so as not to contact the outermost layer 2a of the film roll 2 ′, the package 1 is obtained. For example, the covering member 4 having the same shape as the upper frame portion 31a and the lower frame portion 31b of the gantry 3 is attached to the upper frame portion 31a and the lower frame portion 31b with an adhesive or a tape, respectively, and then surrounds the four columns 31c. The covering member 4 is wrapped around and attached to each support 31c with an adhesive or the like, whereby the substantially rectangular parallelepiped package 1 can be obtained.

As described above, according to the configuration of the coated film roll body 2 of the present embodiment, the heat insulating member 2P having heat insulating properties is provided so as to cover the side surface portion 2c of the film roll 2 ′ and the embossed portion 11. Yes. In this configuration, external heat is blocked and absorbed by the heat insulating member 2P during transportation of the coated film roll body 2 to the warehouse after transportation or after transportation, and is hardly transmitted to the embossed portion 11. Thereby, the thermal expansion of the embossed part 11 (especially convex part) can be suppressed, the unevenness | corrugation of the embossed part 11 is suppressed by a thermal expansion (an unevenness | corrugation difference becomes small), and the grip property between the upper and lower layers falls. Can be suppressed. As a result, it is possible to reduce the occurrence of a landslide-like failure in the winding core direction when the optical film 10 is unwound from the film roll 2 ′ in the next process after the carry-in (for example, a polarizing plate processing process).

Further, since the heat insulating member 2P covers only a part of the film roll 2 ', a part of the outermost layer 2b of the film roll 2' can be exposed. As a result, even if heat is accumulated in the film roll 2 ′, the heat can be released to the outside through the exposed portion of the outermost layer 2b, and the above-described landslide is further suppressed by suppressing the thermal expansion of the embossed portion 11. It becomes possible to further reduce the failure of the state.

The heat insulating member 2P may include an opaque metal sheet or paper sheet. Since these sheets are opaque and absorb or block light and heat from the outside, the heat insulating member 2P having heat insulating properties can be reliably realized. Moreover, the heat insulating member 2P may include a bubble cushioning sheet 21 (see FIG. 7). Since the bubble cushioning sheet 21 exhibits the heat insulating effect by including innumerable bubbles 21a ₃ in the sheet, the heat insulating member 2P having heat insulating properties can be reliably realized.

Further, the film roll 2 ′ may be a wound body by straight winding of the optical film 10 or a wound body by oscillating winding of the optical film 10. Regardless of the winding method, if the unevenness of the embossed portion 11 is crushed, a landslide-like failure occurs when the embossed portion 11 is unrolled. Therefore, the landslide-like failure is reduced by covering at least the embossed portion 11 with the heat insulating member 2P. The configuration of the form is very effective. In particular, in the oscillating winding, the thick portion caused by the thickness deviation in the width direction is shifted and overlapped in the width direction for each layer, so that the upper and lower layers are less likely to stick. In this respect, it can be said that the film roll 2 ′ is preferably a wound body obtained by oscillating the optical film 10.

In the present embodiment, as shown in FIGS. 5 and 6, the film roll 2 ′ is a wound body in which only one type of optical film 10 is wound and laminated. In this configuration, compared to a configuration in which another film (for example, a protective film peeled off in the next step) is laminated on the optical film 10 to form a wound body, the cost can be reduced because the protective film is not used. . Further, for example, in the processing step of the polarizing plate, when the optical film 10 is unwound from the film roll 2 ′, the step of peeling off the protective film is unnecessary, so that the number of steps can be reduced and the manufacturing process can be simplified.

In addition, the packaging body 1 of the present embodiment includes the above-described covering film roll body 2, the gantry 3, and the covering member 4. The covering member 4 covers the gantry 3 to cover the film roll 2 ′ without contact with the outermost layer 2 b. For this reason, a gap layer is interposed between the covering member 4 and the outermost layer 2b of the film roll 2 '. Thereby, the heat from the outside is hardly transmitted to the film roll 2 ′ inside the covering member 4 through the gap layer. Therefore, the effect of suppressing the thermal expansion of the embossed portion 11 of the film roll 2 ′ can be enhanced, and the effect of reducing a landslide-like failure caused by the thermal expansion of the embossed portion 11 can be enhanced.

The covering member 4 is made of a transparent or translucent sheet. In this case, even if heat is accumulated inside the covering member 4, the heat can be released (diffused) to the outside through the covering member 4. Therefore, the effect of suppressing the thermal expansion of the embossed portion 11 of the film roll 2 ′ can be further enhanced, and the effect of reducing a landslide-like failure caused by the thermal expansion of the embossed portion 11 can be further enhanced.

By the way, when the film roll 2 ′ is a wound body by oscillating winding of the optical film 10, the oscillating ratio Q (%) is from the viewpoint of enhancing the effect of suppressing the sticking (blocking) of the upper and lower films.
0% <Q ≦ 1.0%
It is desirable that Here, the oscillating ratio Q is, as shown in FIG. 6, the width in the width direction of the optical film 10 is W0 (mm), and the width in the width direction by oscillating winding between the optical films 10 to be laminated. When the deviation width is W1 (mm), it indicates a ratio defined by the following formula.
Q = (W1 / W0) × 100

If the oscillating ratio Q is larger than 1.0%, that is, if the oscillating amount is too large with respect to the film width, the contact area (contact area) between the embossed portion 11 of the lower film and the upper film becomes small. Thus, the effect of suppressing the sticking of the upper and lower films by the embossed portion 11 becomes small.

[About packaging materials]
FIG. 10 is a perspective view showing another configuration of the coated film roll body 2. The covering film roll body 2 may further include a packaging material 5. The packaging material 5 has a heat insulating property and is a sheet that covers at least a part of the outermost layer 2b of the film roll 2 ′ other than the embossed portion 11 covered with the heat insulating member 2P. For example, the bubble buffer shown in FIG. The sheet 21, a non-transparent metal sheet, a resin sheet, or the like can be configured by a sheet similar to the sheet constituting the heat insulating member 2P. In addition, since the heat insulating member 2P described above covers only a part of the film roll 2 ′ (side surface portion 2c, embossed portion 11), the packaging material 5 is covered so as to cover the outermost layer 2b and a portion other than the embossed portion 11. It is sufficiently possible to provide it.

By covering the outermost layer 2b of the covering film roll body 2 with the packaging material 5, the heat from the outside is blocked or absorbed immediately before the covering film roll body 2, thereby preventing the heat transfer to the covering film roll body 2. it can. Therefore, by using the packaging material 5 together with the heat insulating member 2P, it is possible to further increase the effect of suppressing the thermal expansion of the embossed portion 11 by suppressing the temperature rise of the coating film roll body due to external heat. As a result, the unevenness is not easily crushed by the thermal expansion of the embossed portion 11, and the effect of suppressing the sticking of the upper and lower films by the embossed portion 11 is enhanced.

[Other configurations of film roll package]
FIG. 11 is a perspective view showing another configuration of the package 1. In the packing body 1, the covering member 4 that covers the gantry 3 that houses the covering film roll body 2 may include a packing material 41 having heat insulating properties and a transparent sheet 42. As the packaging material 41 having heat insulating properties, the same metal sheet, resin sheet, paper sheet, bubble cushioning sheet, and the like as the above-described heat insulating member 2P can be used. Since a part of the covering member 4 is composed of the packing material 41, external heat is blocked and absorbed by the packing material 41, so that the heat to the embossed portion 11 of the covering film roll body 2 and the film roll 2 ′ can be reduced. Transmission can be further suppressed, thermal expansion of the embossed part 11 can be further suppressed, and landslide-like failure and upper and lower film sticking due to thermal expansion of the embossed part can be further suppressed.

[Other frame configurations]
In the gantry 3 described above, the lower frame portion 31b may be integrated with the metal plate to form the lower surface portion. In this case, the covering member 4 does not need to cover the lower surface portion of the gantry 3 and can be configured by only the upper surface portion 4a and the four side surface portions 4c described above. From this, it can be said that the covering member 4 only needs to cover the film roll 2 in a non-contact manner with the outermost layer 2 b by covering at least a part of the gantry 3.

〔Example〕
Hereinafter, specific examples of the present invention will be described. The present invention is not limited to these examples.

<Preparation of coated film roll body 1>
First, a film roll A obtained by winding a cellulose triacetate film (TAC film, width 1300 mm, film thickness 40 μm), which is a long optical film having embosses formed at both ends in the width direction, on a core by straight winding. Prepared. That is, the said film roll A is a winding body only of 1 type of optical films called a TAC film (winding length is 4000 m). In addition, since it is a straight winding, the oscillating rate Q defined by the above formula is 0.

Next, a heat insulating sheet (made by Kawakami Sangyo Co., Ltd., thickness 3.5 mm) obtained by bonding a metal sheet to the bubble cushioning sheet having the structure shown in FIG. 7 is used as the heat insulating member, and the heat insulating member is used as an emboss of the film roll A. The side portions and embossed portions of the film roll A were covered with a heat insulating member (see FIG. 8), and the coated film roll body 1 was produced. In addition, in the outermost layer of the film roll A, portions other than the embossed portion were not covered with a packaging material having heat insulating properties.

<Production of packing body 1>
The coated film roll body 1 produced above was accommodated in a gantry having the same structure as in FIG. 2 (the core of the coated film roll body was supported by the gantry). Then, the frame is wrapped with the covering member so as to cover the vertically upper side, the vertically lower side, and the side of the covering film roll body 1 and the outermost layer of the film roll A is not in contact with the covering member. Body 1 was produced. At this time, a transparent sheet was used as the covering member.

<Preparation of coating film roll body 2>
The optical film used in the production of the coated film roll body 1 was wound around a core by oscillating winding so that the oscillating ratio Q defined by the above-described formula was 1.1, and a film roll B was produced. And the embossed part and the side part were coat | covered with the heat insulation member with the method similar to preparation of the covering film roll body 1 with respect to this film roll B, and the covering film roll body 2 was produced.

<Production of packing body 2>
A packaging body 2 was produced in the same manner as the packaging body 1 except that the covering film roll body 1 was replaced with the covering film roll body 2.

<Production of packing body 3>
The film roll A used in the production of the coated film roll body 1 is packaged in the same manner as in the production of the packaging body 1 except that the embossed portion and the side surface portion are not covered with the heat insulating member and accommodated in the gantry as it is. Body 3 was produced.

<Preparation of packing body 4>
The film roll B used in the production of the coated film roll body 2 is packaged in the same manner as in the production of the packaging body 2 except that the embossed portion and the side surface portion are not covered with the heat insulating member and accommodated in the gantry as it is. Body 4 was produced.

<Evaluation>
(Embossed parts are easily crushed)
The produced packaging bodies 1 to 4 were stored in a room at 25 ° C., then taken out outdoors at 30 ° C. where they were exposed to direct sunlight, and left for 60 minutes. Thereafter, in the coated

film roll bodies

1 and 2 accommodated in the

packaging bodies

1 and 2, the heat insulating member covering the embossed portion is removed, and the unevenness of the embossed portion of the roll outermost surface (the roll surface farthest from the core) is removed. The difference (difference between the concave and convex portions) EB1 (μm) was measured using a digital micrometer device (manufactured by Sony Manufacturing Systems Co., Ltd., model number M-30). Further, in the film rolls A and B accommodated in the

packaging bodies

3 and 4, the unevenness difference EB1 (μm) of the embossed portion on the outermost surface of the roll was measured using the digital micrometer device.

Next, the film was fed from each roll to the core with the same tension, and the unevenness difference EB2 (μm) of the embossed portion of the film that was the first layer from the core was measured using the digital micrometer device. Then, the reduction ratio E (%) = {(EB1-EB2) / EB1} × 100 was calculated, and the ease of crushing of the embossed portion was evaluated based on the following evaluation criteria.
"Evaluation criteria"
A: The reduction rate E of the unevenness difference is 15% or less (the embossed portion is not easily crushed).
B: The reduction ratio E of the unevenness difference is larger than 15% (the embossed portion is crushed and has actual harm).

(Landslip)
Using the ruler, measure the amount of landslide in the core direction (width direction) when the rolls 1 to 4 are left outdoors as described above and the film is fed from each roll to the core part with the same tension. did. Then, the length WA in the width direction of the film WA (mm), the amount of landslide (displacement) in the width direction is WB (mm), and the landslide rate h (%) is h = {(WA−WB) / WA. } × 100, and landslide properties were evaluated based on the following evaluation criteria.
"Evaluation criteria"
A: h ≦ 2%, and little landslide has occurred.
B ... h> 2%, and landslide has occurred.

Table 1 shows the evaluation results for the coated

film roll bodies

1 and 2 and the film rolls A and B. Table 1 also shows the correspondence between each roll and the examples or comparative examples.

From Table 1, it can be seen that in the coated film rolls 1 and 2, the embossed portion is not easily crushed and landslide is also suppressed. Since the heat insulating member covers the side surface portion and the embossed portion of the film roll, external heat is blocked and absorbed by the heat insulating member and is not easily transmitted to the embossed portion. The unevenness of the part becomes difficult to be crushed. As a result, it is considered that the grip property between the layers of the laminated films can be maintained and the landslide at the time of feeding the film can be reduced.

On the other hand, in the film rolls A and B, since the side surface portion and the embossed portion of the film roll are not covered with the heat insulating member, the thermal expansion of the embossed portion due to external heat cannot be suppressed, and the unevenness is crushed. As a result, it is considered that a landslide of the film has occurred during feeding.

<Preparation of coated film rolls 3-7>
Each film roll is wound around the core by oscillating winding or straight winding so that the oscillating ratio Q defined by the above-described formula becomes the value shown in Table 2 for the optical film used in the production of the coated film roll body 1 Was made. Then, with respect to each film roll, the embossed portion and the side surface portion were covered with a heat insulating member in the same manner as in the production of the coated film roll body 1, and the coated film roll bodies 3 to 7 were produced. As a result, the coated film roll body 6 is produced by the same production method as the coated film roll body 2, and the coated film roll body 7 is produced by the same production method as the coated film roll body 1.

<Production of packing bodies 5-9>
Packaging bodies 5 to 9 were produced in the same manner as the packaging body 1 except that the covering film roll body 1 was replaced with the covering film roll bodies 3 to 7, respectively.

<Evaluation>
(Adhesiveness)
The produced packages 5 to 9 were stored in a room at 25 ° C., then taken out outdoors at 30 ° C. exposed to direct sunlight, and left for 60 minutes. Thereafter, the film was unwound from the coated film rolls 3 to 7 accommodated in the packing bodies 5 to 9, and it was visually confirmed whether or not the film was stuck in the width direction (for example, at the width center). And sticking property was evaluated based on the following evaluation criteria.
"Evaluation criteria"
A: Almost no sticking was confirmed.
B ... Although weak sticking was confirmed, it has remained in elastic deformation and there is no problem.
C: Strong sticking was confirmed, and plastic deformation occurred.

Table 2 shows the evaluation results for each of the coated film rolls 3-7. Table 2 also shows the correspondence between each of the coated film rolls 3 to 7 and the examples or comparative examples.

From Table 2, it can be said that oscillating winding is more effective in suppressing sticking than straight winding. Originally there is a film thickness deviation (film thickness variation) in the width direction of the film, and the film thickness deviation in the width direction appears almost the same at each position in the longitudinal direction of the film. When the film is wound up, the thick portions always overlap each other and sticking is likely to occur. In the oscillating winding, the thick part is shifted in the width direction for each layer and overlapped, so that it is considered that the upper and lower layers are less likely to stick to each other.

<Preparation of coated film rolls 8-12>
Each film roll is wound around the core by oscillating winding or straight winding so that the oscillating ratio Q defined by the above-described formula becomes the value shown in Table 3 for the optical film used in the production of the coated film roll body 1 Was made. Then, with respect to each film roll, the embossed portion and the side surface portion were covered with a heat insulating member in the same manner as in the production of the coated film roll body 1 to produce coated film roll bodies 8-12. As a result, the coated film roll bodies 8 to 12 are produced by the same production method as the above-described coated

film roll bodies

3, 4, 5, 1, and 2, respectively.

<Production of packing bodies 10 to 14>
Packaging bodies 10 to 14 were produced in the same manner as the packaging body 1 except that the covering film roll body 1 was replaced with the covering film roll bodies 8 to 12, respectively.

<Evaluation>
(End convex deformation)
The produced packages 10 to 14 were stored in a room at 25 ° C., then taken out outdoors at 30 ° C. exposed to direct sunlight, and left for 60 minutes. Thereafter, the film is unwound from the coated film rolls 8 to 12 accommodated in the packaging bodies 10 to 14, and the end of the width direction (excluding the portion where the embossed portion is covered with the heat insulating member) is checked for the presence or absence of convex deformation. It was confirmed visually. Note that the convex deformation at the end is a kind of sticking (blocking), and is a phenomenon that is likely to occur at the wide end by a convex deformation as if a foreign object is sandwiched therebetween. And convex deformation was evaluated based on the following evaluation criteria.
"Evaluation criteria"
A ... Convex deformation was not confirmed at all.
B: Although weak convex deformation was confirmed, there was no actual harm.
C: Strong convex deformation is confirmed and plastic deformation is observed.

Table 3 shows the evaluation results for each of the coated film rolls 8-12. Table 3 also shows the correspondence between each of the coated film rolls 8 to 12 and the examples or comparative examples.

Table 3 shows that when the oscillate ratio Q is larger than 1, weak convex deformation appears at the end. This is because when the amount of oscillate is increased, the contact area between the embossed portion of the lower film and the upper film is decreased, and the effect of preventing sticking by the embossed portion is decreased. As a result, the embossed portion is crushed in a short time, and the deformation of the base material that occurs when the air between the films escapes over time concentrates on the end portion, but the stress cannot be relaxed, and convex deformation tends to occur at the end portion. It is considered a thing. In addition, even when the oscillating ratio Q is 0, that is, straight winding, since the contact area becomes large, the amount of air entering the winding during winding is increased, so that the deformation of the base material is large. Therefore, it is considered that convex deformation tends to occur at the end. Therefore, from the results in Table 3, it can be said that the oscillating rate Q is preferably greater than 0 and 1 or less.

<Preparation of the covering film roll body 13>
The optical film used in the production of the coated film roll body 1 was wound around a core by oscillating winding so that the oscillating ratio Q defined by the above-described formula was a value shown in Table 4 to produce a film roll. And after covering an embossed part and a side part with a heat insulation member by the same technique as preparation of covering film roll body 1 to this film roll, in a film roll, the outermost layer which is not covered with a heat insulation member is heat-insulated. The coated film roll body 13 was produced by covering with a packaging material having properties. In addition, as the packaging material, the same heat insulating sheet as the heat insulating member (manufactured by Kawakami Sangyo Co., Ltd., thickness 3.5 mm) was used.

<Preparation of packing body 15>
A packaging body 15 was produced in the same manner as the packaging body 1 except that the covering film roll body 1 was replaced with the covering film roll body 13.

<Preparation of coating film roll body 14>
In the production of the coated film roll body 13, a coated film roll body 14 was produced in the same manner as the production of the coated film roll body 13 except that the outermost layer of the film roll was not coated with a packaging material having heat insulating properties. . As a result, the coated film roll body 14 is produced by the same production method as the above-described coated film roll body 4.

<Preparation of packing 16>
A packaging body 16 was produced in the same manner as the packaging body 1 except that the covering film roll body 1 was replaced with the covering film roll body 14.

<Evaluation>
(Adhesiveness)
The package bodies 15 and 16 thus prepared were stored in a room at 25 ° C., then taken out outdoors at 30 ° C. exposed to direct sunlight, and left for 60 minutes. Thereafter, the film was drawn out from the coated film roll bodies 13 and 14 accommodated in the packing bodies 15 and 16, and it was visually confirmed whether or not the film was stuck in the width direction (for example, at the width center). And sticking property was evaluated based on the following evaluation criteria.
"Evaluation criteria"
AA: No sticking was confirmed at all.
A: Almost no sticking was confirmed.
B: A weak sticking was confirmed, but the elastic deformation remained, and there was no problem.
C: Strong sticking confirmed and plastic deformation.

Table 4 shows the results of evaluation for each of the coated film roll bodies 13 and 14. In addition, in Table 4, it also shows about the correspondence of each coating film roll body 13 * 14 and an Example or a comparative example.

From Table 4, the coated film roll body 13 in which the outermost layer of the film roll is covered with a heat-insulating packaging material has a higher anti-sticking effect than the coated film roll body 14 in which the outermost layer is not covered with the packaging material. . This is because when the outermost layer of the film roll is covered with a packaging material, it is difficult for external heat to be transmitted to the embossed part through the outermost layer, so that the thermal expansion of the embossed part can be further suppressed, and the embossed part is more crushed. This is considered to be difficult (because a difference in unevenness is reliably ensured).

In the above examples, a TAC film is used as an optical film constituting the film roll. However, an optical film is formed using a cellulose ester resin, a cycloolefin resin, a polyimide resin, a polyarylate resin, etc. other than TAC. Then, even when the optical film was wound to form a film roll and combined with a heat insulating member to produce a coated film roll body, it was confirmed that there was a tendency similar to that of the above-described example.

[Supplement]
Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

The coated film roll body of the present embodiment described above can be expressed as follows.

1. A film roll which is a wound body in which a long optical film made of a thermoplastic resin is wound around a core;
A heat insulating member having heat insulating properties and covering a part of the film roll;
The optical film has a concavo-convex embossed portion at one or more places in the width direction along the core,
The said heat insulation member is provided so that the side part which opposes in the said width direction through the outer peripheral surface of the said film roll, and the said embossing part of the said optical film may be covered. .

2. 2. The coated film roll according to 1 above, wherein the film roll is a wound body by oscillating winding of the optical film.

3. The width in the width direction of the optical film is W0 (mm), the shift width in the width direction due to oscillating winding between the laminated optical films is W1 (mm), and the oscillating ratio Q (%) is ,
Q = (W1 / W0) × 100
When defined in
0% <Q ≦ 1.0%
3. The coated film roll body according to 2 above, wherein

4. 4. The packaging material according to any one of 1 to 3, further comprising a packaging material that has heat insulating properties and covers at least a part of the outermost layer of the film roll other than the embossed portion covered with the heat insulating member. Coated film roll body.

The present invention can be used for a film roll package that is transported while being accommodated in a gantry.

DESCRIPTION OF SYMBOLS 2 Coated film roll body 2 'Film roll

2a Shaft core

2b Outermost layer 2b ₁ Outer peripheral surface 2c Side surface part 2P Thermal insulation member 5 Packaging material 10 Optical film 11 Embossed part

Claims

A film roll which is a wound body in which a long optical film made of a thermoplastic resin is wound around a core;
A heat insulating member having heat insulating properties and covering a part of the film roll;
The optical film has a concavo-convex embossed portion at one or more places in the width direction along the core,
The said heat insulation member is a coating | coated film roll body provided so that the side part which opposes in the said width direction through the outer peripheral surface of the said film roll, and the said embossing part of the said optical film may be covered.
The coated film roll body according to claim 1, wherein the film roll is a wound body obtained by oscillating winding of the optical film.
The width in the width direction of the optical film is W0 (mm), the shift width in the width direction due to oscillating winding between the laminated optical films is W1 (mm), and the oscillating ratio Q (%) is ,
Q = (W1 / W0) × 100
When defined in
0% <Q ≦ 1.0%
The covering film roll body according to claim 2 which is.
The covering film according to any one of claims 1 to 3, further comprising a packaging material that has a heat insulating property and covers at least a part of the outermost layer of the film roll other than the embossed portion covered with the heat insulating member. Roll body.