CN113772276A - Package of film roll - Google Patents

Package of film roll Download PDF

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Publication number
CN113772276A
CN113772276A CN202111091162.7A CN202111091162A CN113772276A CN 113772276 A CN113772276 A CN 113772276A CN 202111091162 A CN202111091162 A CN 202111091162A CN 113772276 A CN113772276 A CN 113772276A
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CN
China
Prior art keywords
film roll
holder
package
film
roll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202111091162.7A
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Chinese (zh)
Other versions
CN113772276B (en
Inventor
井上岳士
田中博文
南条崇
最上尚行
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Inc
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Konica Minolta Inc
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Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to CN202111091162.7A priority Critical patent/CN113772276B/en
Publication of CN113772276A publication Critical patent/CN113772276A/en
Application granted granted Critical
Publication of CN113772276B publication Critical patent/CN113772276B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/66—Containers, packaging elements or packages, specially adapted for particular articles or materials for jumbo rolls; for rolls of floor covering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D61/00—External frames or supports adapted to be assembled around, or applied to, articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3888—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation wrappers or flexible containers, e.g. pouches, bags
    • B65D81/389—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation wrappers or flexible containers, e.g. pouches, bags formed of foam material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Packaging Of Machine Parts And Wound Products (AREA)
  • Storage Of Harvested Produce (AREA)

Abstract

The package body (1) is provided with a film roll (2), a holder (3), and a packaging material (41). The film roll (2) is a wound body formed by winding a long optical film made of thermoplastic resin around a winding core (2 a). The holder (3) can hold the film roll (2) inside via the winding core (2a) so that the outermost layer (2b) of the film roll (2) does not contact other parts. The packing material (41) has heat insulation properties, and wraps the holder (3) so as to cover the film roll (2) vertically above or below the holder, and wraps at least a part of the holder (3) in the vertical direction so as to cover the film roll (2) from the side. In the holder, a portion of the holder that is not wrapped with the packing material is wrapped with a transparent sheet, and a coverage of the holder with the packing material in the vertical direction is 10% or more and 50% or less.

Description

Package of film roll
The application is a divisional application of an invention patent application with the international application date of 2017, 10 and 12 months and the application number of 201780073492.9 and the name of the invention of a package body of a film roll.
Technical Field
The present invention relates to a package of a film roll in which the film roll is stored in a holder and packaged with a packaging material.
Background
In recent years, as display devices have been made thinner, it has been desired to make optical films mounted on polarizing plates thinner. A thin optical film is formed in a long shape and then wound into a roll to form a film roll, but since the film is a thin film, blocking (adhesion between stacked films) or deformation of the roll shape due to weight is likely to occur. Therefore, a study has been made on the shape of embossings (uneven portions) formed at the width end portions of the optical film, and a countermeasure has been taken such as changing the winding method of the optical film from direct winding (a method of winding the optical film with the width end portions facing each other) to vibration winding (a method of winding the optical film while swinging the width end portions in the core direction).
The film roll is packed and conveyed or stored in a warehouse by a packing material. At this time, wrinkles are generated in the film roll due to thermal expansion caused by a change in ambient temperature. In view of the above, for example, in patent document 1, at least a part of the surface of a film roll in which a laminated film obtained by laminating an optical film and a protective film is wound in a roll shape is covered with a heat insulating sheet, thereby suppressing the occurrence of wrinkles in the film roll due to thermal expansion during transportation or storage.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2010-221625 (see claim 1, [ 0006 ], [ 0009 ], [ 0015 ], paragraph, FIG. 4, etc.)
Disclosure of Invention
Technical problem to be solved by the invention
However, when the package of the film roll is stored in a container and transported, and then carried from the container to a warehouse, and the state of the film roll inside the package is confirmed, it is found that a defect 101 is confirmed to be generated in the outermost layer 100a of the film roll 100 as shown in fig. 14. The defect 101 is a chain-like deformation in which recesses or projections having a substantially triangular shape in plan view are connected in a chain-like manner in the circumferential direction of the film roll 100. The inventors of the present application speculate as follows regarding the generation principle of the defect 101. That is, in the loading operation for loading the package from the container to the warehouse, the package is exposed to the outside, and therefore the temperature of the package rapidly rises, and the film roll 100 inside the package rapidly thermally expands. It is estimated that such rapid thermal expansion of the film roll 100 causes buckling deformation of the roll surface, and wrinkles caused by the buckling deformation appear as chain defects 101.
However, no studies have been made on the structure of the package body for reducing the occurrence of the chain defects 101 due to the package body being exposed to the outside and a rapid temperature rise.
In patent document 1, although defects occurring before and after the film roll is exposed to the outside, that is, defects occurring due to a gradual temperature increase with time, at the time of transportation or storage of the film roll, etc., are reduced by covering the outermost surface of the film roll with a heat insulating sheet, no consideration has been made on reducing chain defects caused by a rapid temperature increase occurring when the package is exposed to the outside, such as at the time of carrying-in operation to the warehouse, etc.
The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a package of a film roll capable of reducing the occurrence of a chain defect (deformation) in the film roll due to a rapid temperature rise caused by exposure of the package to the outside.
Technical solution for solving technical problem
The above object of the present invention is achieved by the following configurations.
That is, the package of the film roll according to one aspect of the present invention includes: a film roll which is a wound body formed by winding a long optical film made of a thermoplastic resin around a winding core; a holder capable of holding the film roll inside via the winding core so that the outermost layer of the film roll does not contact other portions; a packaging material having heat insulation properties, wherein the holder is packaged so as to cover a vertically upper portion or a vertically lower portion of the film roll, and at least a portion of the holder in the vertical direction is packaged so as to cover the film roll from a side, wherein a portion of the holder that is not packaged by the packaging material is packaged by a transparent sheet, and wherein a coverage ratio P defined by the following formula is 10% or more and 50% or less, where a length of the holder in the vertical direction is H (mm) and a length of the packaging material in the vertical direction that is packaged by at least a portion of the holder in the vertical direction is X (mm), and P is (X/H) × 100.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the above configuration, at least a part of the holder holding the film roll inside is wrapped with a packing material having heat insulation properties (the heat insulation properties in the present invention include effects of inhibiting heat conduction and blocking heat release and heat radiation). The film roll is held inside the holder so that the outermost layer does not contact other parts, and a gap layer is present between the film roll and the packing material covering the holder. Since the packaging material has heat insulation properties and the void layer functions as heat insulation, even if the package including the film roll is exposed to the outside, it is possible to suppress occurrence of a rapid temperature rise in the film roll inside the package. Further, since the covering member is partially made of the packaging material having heat insulation properties, even if heat is accumulated inside the covering member, the heat can be diffused (radiated) to the outside through the remaining portion of the covering member (the transparent sheet other than the packaging material). This can reduce the occurrence of chain defects (deformation) caused by thermal expansion in the film roll. Further, the coverage particularly affects the elastic deformation of the roll when the package is returned to the room after being exposed to the outside, and if the coverage P is 10% or more and 50% or less, the heat insulating effect of the packaging material and the heat radiating effect of the transparent sheet can be obtained in a balanced manner, and the effect of suppressing the elastic deformation is excellent.
Drawings
Fig. 1 is a perspective view showing a schematic configuration of a package of a film roll according to an embodiment of the present invention.
Fig. 2 is a perspective view showing a film roll and a holder constituting the package.
Fig. 3 is a perspective view showing an appearance of the film roll.
Fig. 4 is a sectional view of a film roll in which an optical film is wound by direct winding.
Fig. 5 is a sectional view of a film roll in which an optical film is wound by vibration winding.
Fig. 6 is an exploded perspective view of the above-described stand.
FIG. 7 is a side view of the package.
Fig. 8 is a sectional view showing a structure of a bubble buffer sheet as an example of a packing material for packing the holder.
Fig. 9 is an explanatory view showing an example of the method of manufacturing the package.
FIG. 10 is an explanatory view showing another method of producing the package.
FIG. 11 is an explanatory view showing still another method of manufacturing the package.
FIG. 12 is a perspective view showing another structure of the package body.
Fig. 13 is a perspective view showing still another configuration of the package body without illustration of the bracket and the covering member.
Fig. 14 is a perspective view of a film roll in which chain defects have occurred in the outermost layer.
Detailed Description
Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In the present specification, when a numerical range is expressed as a to B, the numerical range is considered to include the values of the lower limit a and the upper limit B.
[ constitution of package body of film roll ]
Fig. 1 is a perspective view showing a schematic configuration of a package 1 of a film roll (hereinafter simply referred to as a package) according to the present embodiment. The package 1 includes a film roll 2, a holder 3, and a cover member 4. In fig. 1, the cover member 4 is hatched for the purpose of clarifying the cover member 4 (in other drawings, hatched lines are shown as necessary).
Fig. 2 is a perspective view showing the film roll 2 and the holder 3 before being packaged with the covering member 4, and fig. 3 is a perspective view showing an external appearance of the film roll 2. The film roll 2 is a wound body in which a long optical film 10 made of a thermoplastic resin is wound around a winding core 2 a. As the thermoplastic resin, for example, a cellulose ester resin, a cycloolefin resin, a polyimide resin, a polyarylate resin, or the like can be used.
The long optical film 10 is formed into a film by, for example, a solution casting film-forming method. In the solution casting film forming method, a raw material solution containing a resin and a solvent is cast from a casting die onto a moving support, and dried on the support to form a casting film. Then, the cast film is peeled off, stretched and dried to form a film, both ends in the width direction of the film are cut (slit), and then both ends in the width direction of the remaining film are subjected to embossing. In the embossing process, embossing rollers having an uneven surface engraved thereon are pressed against both ends of the film, and the uneven surface is transferred to the film to form embossed portions. The film formed in this manner is finally wound around a winding core to form a rolled optical film (film roll). The method for forming the optical film 10 is not limited to the solution casting film forming method described above, and may be another film forming method (for example, a melt casting film forming method).
Fig. 4 and 5 are sectional views of the film roll 2, fig. 4 is a sectional view of the film roll 2 in which the optical film 10 is wound by direct winding, and fig. 5 is a sectional view of the film roll 2 in which the optical film 10 is wound by vibration winding. The direct winding is a method of winding the optical film 10 while aligning the width ends thereof without swinging in the width direction, and the vibration winding is a method of winding the optical film 10 while swinging in the width direction.
As shown in these figures, embossed portions 11 having an uneven shape are formed by the embossing process at both ends of the optical film 10 in the width direction (direction along the core). This can suppress the adhesion (blocking) of the upper and lower optical films 10 and the displacement in the core direction of the optical film 10 in the film roll 2. The width W of the embossed portion 11 may be, for example, 5% of the width W0 of the optical film 10, but is not limited to this value. The widths W and W0 are both lengths (mm) along the width direction of the film. The number of embossed portions 11 is not particularly limited (may be two or more) as long as they are formed at a certain position in the width direction of the optical film 10 at the minimum, but they are usually formed at two positions at both ends in the width direction.
Fig. 6 is an exploded perspective view of the holder 3. The holder 3 is configured to be able to hold the film roll 2 inside via the winding core 2a so that the outermost layer 2b of the film roll 2 does not contact other parts. Specifically, the bracket 3 includes a frame 31 and two support beams 32. For convenience of explanation, in the following description, the side supporting the winding core 2a when the film roll 2 is placed (housed) on the holder 3 so that the winding core 2a is horizontal is referred to as "lower", "lower" or "lower side", and the opposite side is referred to as "upper", "upper" or "upper side". Therefore, the vertical direction is the same as the vertical direction. The direction perpendicular to the vertical direction is referred to as a lateral direction.
The frame body 31 is a frame having a substantially cubic shape as a whole (see fig. 2), and is formed in a size capable of accommodating the film roll 2 while projecting to the outside. The frame 31 includes an upper frame portion 31a, a lower frame portion 31b, and four support columns 31 c. The upper frame portion 31a and the lower frame portion 31b are frame-shaped frames along the long sides and the short sides of the rectangle. The upper frame portion 31a is located above the held film roll 2, and the lower frame portion 31b is located below the held film roll 2. The corner portions (vertices of rectangles) of the upper frame portion 31a and the corner portions (vertices of rectangles) of the lower frame portion 31b are connected via support posts 31c, respectively. That is, each of the support columns 31c connects the upper frame portion 31a and the lower frame portion 31b in the vertical direction. Thus, a substantially cubic frame (frame body 31) is formed.
One of the two support beams 32 is connected to the two support columns 31c that connect the short sides of the upper frame portion 31a and the lower frame portion 31b to each other so as to be horizontal (vertical to the support column 31 c) between the two support columns 31 c. The other of the two support beams 32 is similarly connected to the two remaining support columns 31c so as to be horizontal (vertical to the support columns 31 c) between the two support columns 31c that connect the remaining short sides of the upper frame portion 31a and the lower frame portion 31b to each other.
The two support beams 32 are formed with recesses 32a cut in a semi-cylindrical shape so as to open on the upper frame portion 31a side. As shown in fig. 2, both end portions of the winding core 2a of the film roll 2 enter the concave portions 32a of the support beams 32, whereby the winding core 2a is fixed to the support beams 32 and the film roll 2 is stably supported. A rotatable lid member may be provided on the support beam 32, and the lid member may cover the recessed portion 32a after the winding core 2a enters the recessed portion 32a, thereby preventing the winding core 2a from falling off the recessed portion 32 a.
It should be noted that the holder 3 is not limited to the above-described structure and shape. For example, the stand 3 may be configured to be foldable by separating (removing) a part of the frame 31 and the support beam 32. The holder 3 may have a shape in which a part of the cubic shape described above has a rounded corner.
The covering member 4 shown in fig. 1 covers the stent 3, thereby covering the film roll 2 inside the stent 3 so as not to contact with the outermost layer 2b of the film roll 2. Since the bracket 3 is a frame having a substantially cubic shape, the covering member 4 covering the bracket 3 has a shape along the outer surface of the cube. That is, the covering member 4 includes an upper surface portion 4a and a lower surface portion 4b that face each other with the film roll 2 interposed therebetween, and four side surface portions 4 c. The upper surface portion 4a is a surface covering an upper frame portion 31a (see fig. 6) of the frame body 31, and has side edges formed in a substantially rectangular shape along the upper frame portion 31 a. The lower surface portion 4b is a surface covering a lower frame portion 31b (see fig. 6) of the frame body 31, and side edges thereof are formed in a substantially rectangular shape along the lower frame portion 31 b. The four side surface portions 4c are formed in a rectangular shape by connecting outer edges (side edges) of the upper surface portion 4a and the lower surface portion 4b having a substantially rectangular shape to each other.
In the present embodiment, the covering member 4 is configured to include a packaging material 41 and a transparent sheet 42, and the packaging material 41 has heat insulation properties. More specifically, as shown in fig. 1, in the cover member 4, a part in the height direction of the upper surface portion 4a and the side surface portion 4c (the direction in which the upper surface portion 4a faces the lower surface portion 4b, the vertical direction) is constituted by a heat-insulating packaging material 41, and the remaining part in the height direction of the lower surface portion 4b and the side surface portion 4c is constituted by a transparent sheet 42. For example, the entire upper surface portion 4a and the side surface portion 4c of the cover member 4 (the entire region in the height direction) may be formed of the packing material 41, and only the lower surface portion 4b may be formed of the transparent sheet 42.
Here, the coverage ratio P is a ratio of an area occupied by the packing material 41 to a total area of the four side surface parts 4 c. As shown in fig. 7, the coverage P is defined by the following equation, where h (mm) is the length of the side surface portion 4c of the cover member 4 in the direction in which the upper surface portion 4a and the lower surface portion 4b face each other, that is, the length of the holder 3 in the vertical direction covered with the cover member 4, and x (mm) is the length of the side surface portion 4c in the direction in which the portion made of the packing material 41 faces each other, that is, the length of the packing material 41 in the vertical direction wrapping at least a portion of the holder 3 in the vertical direction. The coverage P may be set as appropriate within a range of greater than 0% and 100% or less.
P(％)＝(X/H)×100
When the upper surface portion 4a and the side surface portion 4c are partially formed of the packaging material 41, the upper surface portion 4a and the side surface portion 4c of the packaging material 41 may be connected to each other or may be separated from each other. Similarly, when the packing material 41 forms part of the lower surface portion 4b and the side surface portion 4c, the lower surface portion 4b and the side surface portion 4c of the packing material 41 may be connected to each other or may be separated from each other.
As the packing material 41 having heat insulation properties, for example, a material that is opaque and absorbs or blocks light or heat can be used. For example, a metal sheet such as an aluminum foil, a paper sheet including a thick paper or a thin wrapping paper such as a corrugated paper, a resin sheet in which a coloring pigment (for example, carbon black) is mixed in a transparent resin, cloth, wood, or the like can be used as the packing material 41.
As the packing material 41, for example, a bubble cushion sheet 41a shown in fig. 8 can be used. The bubble buffer sheet 41a is formed by two polyethylene sheets 41a1,41a2To form an infinite number of air bubbles (air layers) 41a therebetween3By means of the air bubbles 41a3And a sheet having a cushioning property.
The packaging material 41 can also be formed by appropriately combining the above materials. For example, the packing material 41 may be formed by bonding a bubble-cushioning sheet to a metal sheet, or the packing material 41 may be formed by bonding a resin sheet to a metal sheet.
The transparent sheet 42 constitutes a part of the covering member 4 other than the packaging material 41. The transparent sheet 42 is not particularly limited as long as it is a transparent resin sheet. For example, a transparent resin sheet manufactured using polyvinylidene chloride (PVDC), polyvinyl chloride (PVC), low density polyethylene (PE, LDPE), or the like as a raw material can be used as the transparent sheet 42.
[ method of manufacturing Package ]
Next, a method for manufacturing the package body 1 will be described. For example, when a metal sheet is used as the packing material 41 and a transparent resin sheet made of polyethylene is used as the transparent sheet 42, the package body 1 can be obtained by covering the holder 3 with the packing material 41 and the transparent sheet 42 as follows. In the following drawings, for convenience of explanation, the support beam 32a of the frame 3 and the film roll 2 are not shown, but the film roll 2 is supported by the support beam 32a on the frame 3 (the same applies to the following drawings).
Fig. 9 is an explanatory view showing an example of the method of manufacturing the package body 1 according to the present embodiment. First, the lower frame portion 31b of the bracket 3 is covered with the transparent sheet 42, and fixed with an adhesive or a tape. Next, the transparent sheet 42 is wound so as to sequentially surround the lower half portions (the lower frame portion 31b side with respect to the center in the height direction) of the four support columns 31c, and fixed by an adhesive or the like.
Next, the upper frame portion 31a of the bracket 3 is covered with the packing material 41, and fixed with an adhesive or the like. Then, the packing material 41 is wound so as to surround the upper half portions of the four support columns 31c in this order (toward the upper frame portion 31a side with respect to the center in the height direction), and is fixed by an adhesive or the like (P is 50%). Thereby, the package body 1 is completed. The length X of the packing material 41 and the length (W-X) of the transparent sheet 42 may be appropriately adjusted to achieve the set coverage P.
First, the entire holder 3 or the entire upper frame portion 31a and the four support columns 31c may be covered with the transparent sheet 42, and then, part of the upper frame portion 31a and the four support columns 31c in the height direction may be covered with the packing material 41 (e.g., a metal sheet). In this case, although the transparent sheet 42 is present inside the packaging material 41, the cover member 4 is not changed in that the portion other than the packaging material 41 is the transparent sheet 42.
Fig. 10 is an explanatory view showing another method of manufacturing the package 1. The package 1 can be manufactured as follows. That is, the transparent sheet 42 is adhered with an adhesive or the like so as to cover the lower frame portion 31b of the holder 3, and the notches 42P are formed at four corners of the transparent sheet 42. Then, the transparent sheet 42 protruding from the lower frame portion 31b is bent along the lower frame portion 31b and fixed to the support column 31c by an adhesive or the like. Next, the packaging material 41 is adhered with an adhesive or the like so as to cover the upper frame portion 31a of the holder 3, and notches 41P are formed at four corners of the packaging material 41. Then, the packing material 41 protruding from the upper frame portion 31a is bent along the upper frame portion 31a and fixed to the support column 31c with an adhesive or the like. Thereby, the package body 1 is completed.
Fig. 11 is an explanatory view showing still another manufacturing method of the package body 1. For example, as the packing material 41, a lid portion 41b formed by previously folding thick paper such as corrugated paper into a lid shape can be used. In this case, the package body 1 can be obtained by winding the transparent sheet 42 so as to cover the lower half portion (including the lower frame portion 31b) of the holder 3, fixing them with an adhesive or the like, and then covering the lid portion 41b on the holder 3 from the upper frame portion 31a side.
As described above, in the present embodiment, a part of the cover member 4 that covers the film roll 2 by covering the holder 3 is made of the packing material 41 having heat insulation properties. This prevents the transfer of heat from the outside of the package 1 to the film roll 2 by the packing material 41. The outermost layer 2b of the film roll 2 is not in contact with the packing material 41, and a void layer is present therebetween. Since the thermal conductivity of air is extremely low, the effect of blocking the transmission of external heat to the film roll 2 is further enhanced. Further, since the packaging material 41 having heat insulation properties is a part of the cover member 4, even if heat is accumulated inside the cover member 4, the heat can be diffused (radiated) to the outside through the remaining part of the cover member 4 (the transparent sheet 42 other than the packaging material 41).
Therefore, according to the above, even if the package body 1 is exposed to the outside during the loading operation of loading the package body 1 into the warehouse after the transportation, the occurrence of a rapid temperature rise in the film roll 2 inside the package body 1 can be suppressed. This can suppress thermal expansion of the film roll 2 and reduce the occurrence of chain defects due to the thermal expansion.
In the package body 1, if the coverage P of the packing material 41 defined by the above definition is increased, the area of the portion (the transparent sheet 42) of the side surface portion 4c other than the packing material 41 is reduced, and thus the heat dissipation property when the heat sealed inside the cover member 4 is dissipated through the transparent sheet 42 is reduced. If the heat dissipation property is lowered, heat is likely to accumulate inside the cover member 4, and the effect of suppressing thermal expansion of the film roll 2 is deteriorated, and the effect of reducing chain defects is deteriorated. From this viewpoint, the coverage P is preferably 50% or less.
On the other hand, if the coverage P of the packing material 41 is less than 10%, the effect of shielding external heat by the packing material 41 having heat insulation in the side surface portion 4c is deteriorated.
From the above, it is desirable that the coverage P is 10% or more and 50% or less from the viewpoint of obtaining the heat insulating effect of the packing material 41 and the heat radiating effect of the transparent sheet 42 in a well-balanced manner.
In the present embodiment, as shown in fig. 4 and 5, the film roll 2 is a roll body in which only one type of optical film 10 is wound and laminated. In this configuration, as compared with a configuration in which another film (for example, a protective film peeled off in a subsequent step) is laminated on the optical film 10 to form a roll, since the protective film is not used, the cost for implementation can be reduced by that amount. Further, for example, in the polarizing plate processing step, when the optical film 10 is fed from the film roll 2, a step of peeling the protective film is not necessary, and therefore, the man-hours can be reduced and the manufacturing process can be simplified.
In the present embodiment, the covering member 4 is made of the transparent sheet 42 except for the heat-insulating packaging material 41. Thus, even if heat is accumulated inside the cover member 4, the heat can be diffused to the outside through the transparent sheet 42. Therefore, the heat accumulated inside the cover member 4 can be reduced, the temperature of the film roll 2 can be suppressed from rising, and chain defects caused by thermal expansion of the film roll 2 can be efficiently suppressed. Further, the transparent sheet 42 can protect the film roll 2 from external weather and dust.
Fig. 12 is a perspective view showing another configuration of the package body 1 according to the present embodiment. As shown in this figure, in the package body 1, the positional relationship between the heat-insulating packaging material 41 and the transparent sheet 42 may be reversed from the configuration of fig. 1. That is, the lower surface portion 4b of the cover member 4 and a part of the side surface portion 4c on the lower surface portion 4b side may be made of the packing material 41 having heat insulation properties. At this time, the remaining portions (the upper surface portion 4a side portions) of the upper surface portion 4a and the side surface portions 4c of the cover member 4 are formed of the transparent sheet 42.
As shown in fig. 1 and 12, at least a part of the upper surface portion 4a or the lower surface portion 4b of the covering member 4 and the side surface portion 4c in the height direction (the direction in which the upper surface portion 4a and the lower surface portion 4b face each other) is formed of a packing material 41 having heat insulation properties, and the area covered with the packing material 41 is increased as compared with a structure in which only the upper surface portion 4a or only the lower surface portion 4b is covered with the packing material 41, thereby further improving the heat shielding effect. Therefore, in the film roll 2, the effect of reducing the chain defects caused by thermal expansion can be reliably obtained.
As is apparent from fig. 1 and 12, the upper surface portion 4a of the covering member 4 covers the vertically upper side of the film roll 2, the lower surface portion 4b covers the vertically lower side of the film roll 2, and the side surface portion 4c covers the film roll 2 from the side. Therefore, the packaging material 41 constituting at least a part of the upper surface portion 4a or the lower surface portion 4b and the side surface portion 4c in the vertical direction can be expressed as follows by packaging the holder 3. That is, the heat-insulating packing material 41 wraps the rack 3 so as to cover the vertical upper side or the vertical lower side of the film roll 2, and wraps the rack 3 so as to cover at least a part of the vertical direction of the rack 3 from the side with the film roll 2.
[ concerning packaging materials ]
Fig. 13 is a perspective view showing still another configuration of the package body 1 without illustration of the bracket 3 and the cover member 4. The package body 1 may further include a wrapping material 5. The wrapping material 5 is a sheet material that covers at least a part of the outermost layer 2b of the film roll 2 in the roll core direction of the film roll 2 (direction in which the roll core 2a extends), and can be formed of, for example, the same sheet material as the sheet material forming the packing material 41, such as the bubble buffer sheet material 41a, an opaque metal sheet material, or a resin sheet material shown in fig. 8.
By covering the outermost layer 2b of the film roll 2 with the wrapping material 5, heat from the outside can be shielded or absorbed in front of the film roll 2, and the transmission of heat to the film roll 2 can be inhibited. Therefore, by using the packing material 41 and the wrapping material 5 together, the effect of suppressing a rapid temperature rise of the film roll 2 due to external heat can be further improved, and the effect of reducing chain defects caused by thermal expansion in the film roll 2 can be further improved.
Here, the thickness of the wrapping material 5 is preferably larger than the thickness of the packing material 41 of the covering member 4. In this case, even if external heat reaches the wrapping material 5 through the packing material 41, the heat can be reliably blocked by the thickness of the wrapping material 5. Therefore, not only the chain defects described above but also elastic deformation due to heat of the film roll 2 can be suppressed.
[ other constructions relating to stents ]
In the above-described bracket 3, the lower frame portion 31b may be formed integrally with the metal plate to constitute a lower surface portion. In this case, the covering member 4 does not need to cover the lower surface portion of the bracket 3, and may be constituted only by the upper surface portion 4a and the four side surface portions 4 c. Thus, the covering member 4 may be configured to cover the film roll 2 so as not to contact the outermost layer 2b by covering at least a part of the stent 3.
[ example ]
Specific examples of the present invention will be described below. In addition, the present invention is not limited to these examples.
< manufacture of Package 1 >
First, a film roll was prepared in which a cellulose triacetate film (TAC film, 1300mm in width and 40 μm in thickness) as a long optical film was wound around a core. That is, the film roll is a roll of an optical film of only TAC film (roll length 4000 m). The film roll is stored in a holder (a core for supporting the film roll by the holder) having the same structure as that of fig. 2 so that the outermost layer of the roll does not contact other members (for example, the holder). Here, the film roll is stored in the holder without covering the outermost layer of the film roll with a packaging material (heat insulating sheet).
Next, a metal sheet (manufactured by martai corporation, 30 μm thick) was used as a packing material, the holder was wrapped with the packing material so as to cover the vertically upper side of the film roll housed inside the holder, and the packing material was fixed with an adhesive tape. The package 1 was produced by using a transparent sheet (thickness 50 μm) made of low-density polyethylene as the transparent sheet, wrapping the holder with the transparent sheet so as to cover the vertically lower side of the film roll and surround the film roll from the side, and fixing the holder with an adhesive tape. The order of packaging with the packaging material and the transparent sheet may be reversed. In the package body 1, since the packaging material does not cover the sides of the film roll (the sides of the film are covered with the transparent sheet), the coverage P of the packaging material defined by the above formula is 0%.
< manufacture of Package 2 >
The package 2 is produced in the same manner as the package 1 except that the holder is wrapped with a wrapping material so that the film roll is covered from the side in addition to the vertically upper side of the film roll. At this time, the upper half of the holder was wrapped with a wrapping material so that the coverage P of the wrapping material on the side surface portion was 50%. The portion of the holder that is not wrapped with the packaging material (the lower half of the holder) is wrapped with the same transparent sheet as used for the production of the package body 1.
< manufacture of bag body 3 >
The package 3 is produced in the same manner as the package 1 except that the holder is wrapped with a wrapping material so that the film roll is covered from the side in addition to the vertically upper side of the film roll. At this time, the entire region of the holder in the vertical direction is wrapped with the wrapping material so that the coverage P of the wrapping material in the side surface portion is 100%. In the portion of the holder that is not wrapped with the wrapping material (vertically below the film roll), the same sheet as the transparent sheet used for manufacturing the package body 1 is used for wrapping.
< manufacture of bag body 4 >
The package body 4 was produced in the same manner as the package body 1 except that the rack was wrapped with the wrapping material so as to cover the vertically lower side of the film roll housed in the rack, and the rack was wrapped with the transparent sheet so as to cover the vertically upper side and the side of the film roll. In the package body 4, since the packaging material does not cover the sides of the film roll (the sides of the film are covered with the transparent sheet), the coverage P of the packaging material defined by the above formula is 0%.
< manufacture of bag body 5 >
The package body 5 is produced in the same manner as the package body 4 except that the holder is packaged with a packaging material so that the film roll is covered from the side in addition to the vertically lower side of the film roll. At this time, the lower half of the rack was wrapped with the wrapping material so that the coverage P of the wrapping material on the side surface portion was 50%. The portion of the holder that is not wrapped with the packaging material (the upper half portion of the holder) is wrapped with the same transparent sheet as used for the production of the package body 4.
< manufacture of package body 6 >
The package body 6 is produced in the same manner as the package body 4 except that the holder is wrapped with a wrapping material so that the film roll is covered from the side in addition to the vertically lower side of the film roll. At this time, the entire region of the holder in the vertical direction is wrapped with the wrapping material so that the coverage P of the wrapping material in the side surface portion is 100%. The same transparent sheet as that used for the production of the package body 4 is used for the portion of the holder that is not packaged with the packaging material (vertically above the film roll).
< manufacture of package body 7 >
After the film roll used for the production of the package 1 was stored in the holder, the holder was wrapped with only the transparent sheet to produce the package 7. As the transparent sheet, the same transparent sheet as used for manufacturing the package body 1 is used.
< manufacture of bag body 8 >
The wrapping material is wound around the outermost layer of the film roll used for manufacturing the package 1, and the film roll is stored in the holder. Then, the package 8 is produced by wrapping the holder only with a transparent sheet. As the packaging material, a heat insulating sheet (manufactured by kawa industrial co., ltd., thickness 3.5mm) obtained by laminating a metal sheet to a bubble cushion sheet having the structure shown in fig. 8 was used. As the transparent sheet, the same transparent sheet as used for manufacturing the package body 1 is used.
< evaluation >
(volume temperature Change 1)
The prepared package bodies 1 to 8 were stored at 25 ℃ in a room, and then were taken out of the room where the temperature was 30 ℃ and the package bodies were exposed to direct sunlight for 60 minutes. Then, the temperature of the outermost surface of the roll after being placed outdoors was measured by a temperature sensor (model 05609056, manufactured by Testo corporation). Here, if the amount of change in the coil temperature is T1(° c), it is defined as T1 ═ (membrane temperature after leaving for 60 minutes) - (membrane temperature in the room (25 ℃)).
Reference to evaluation
◎：T1≤7℃
○：7℃＜T1≤10℃
△：10℃＜T1≤15℃
×：15℃＜T1
(chain deformation)
After the prepared packages 1 to 8 were left outdoors for 60 minutes, the presence or absence of chain-like deformation in the outermost layer of the film roll was visually confirmed. Then, the chain deformation was evaluated based on the following evaluation criteria.
Reference to evaluation
Very good: no deformation was confirmed.
O: some deformation was confirmed, but there was no problem in practical use because of elastic deformation.
And (delta): 1-2 strand-like deformations were observed.
X: more than 3 chain-like deformations were observed.
Table 1 shows the results of evaluation of the package bodies 1 to 8. Table 1 also shows the correspondence between the package bodies 1 to 8 and the examples and comparative examples. In the packing position of the packing material in the table, "upper", "lower" and "side" indicate positions vertically above, vertically below and laterally of the roll of the covering film, respectively, and the same description is also applied to the following table.
[ Table 1]
Figure BDA0003267524060000131
According to table 1, in examples 1 to 4, no chain-like deformation was observed in the outermost layer of the film roll. This is considered to be because, in the package bodies of examples 1 to 4, the holder is covered with the packing material having heat insulation properties so as to cover the vertically upper side or the vertically lower side of the film roll and the side of the film roll, and the void layer that suppresses heat transfer is present between the packing material and the film roll, so that the heat insulation properties are improved by the synergistic effect of these, and a rapid temperature rise of the film roll is suppressed, and as a result, chain-like deformation due to thermal expansion is suppressed.
In contrast, in comparative examples 1 and 2, chain-like deformation was observed. This is considered to be because when the holder is covered with the heat-insulating packaging material only vertically above or below the film roll, the heat-insulating effect cannot be sufficiently exhibited, and therefore, it is difficult to suppress a rapid temperature rise of the film roll, and chain-like deformation occurs due to thermal expansion.
In comparative example 3, it is considered that since the holder is not covered with the heat-insulating packaging material, a rapid temperature rise of the film roll occurs, and chain-like deformation occurs due to thermal expansion. In comparative example 4, the outermost layer of the film roll was covered with a heat-insulating wrapping material, but finally, chain-like deformation was caused by thermal expansion. From this, it was found that when the outermost layer of the roll was covered with only the wrapping material, a space for suppressing heat transfer could not be sufficiently secured between the outermost layer of the roll and the wrapping material, and the effect of suppressing a rapid temperature rise of the film roll was poor.
< manufacture of bag body 9 >
The package 9 is produced in the same manner as the package 1. That is, in the package body 9, the coverage P is 0%.
< manufacture of bag body 10-15 >
Packages 10 to 15 were produced in the same manner as in the package 1 except that the holders were wrapped with a wrapping material so that the film roll was covered from the side in addition to the vertically upper side of the film roll. At this time, the package bodies 10 to 15 were produced by wrapping at least a part of the holder in the vertical direction with the packaging material so that the coverage P of the packaging material on the side surface portions became the value shown in table 2. The portion of the holder that is not wrapped with the packaging material is wrapped with the same sheet as the transparent sheet used for the production of the package body 1.
< evaluation >
(volume temperature Change 1)
The produced package 9-15 was stored at 25 ℃ in a room, and then was taken out to the 30 ℃ room where the package was directly irradiated and left for 60 minutes. Then, the temperature of the outermost surface of the roll after being placed outdoors is measured by the temperature sensor. Here, if the amount of change in the coil temperature is T1(° c), it is defined as T1 ═ (membrane temperature after leaving for 60 minutes) - (membrane temperature in the room (25 ℃)).
Reference to evaluation
◎：T1≤7℃
○：7℃＜T1≤10℃
△：10℃＜T1≤15℃
(volume temperature Change 2)
As described above, the package bodies 9 to 15 were left outside for 60 minutes, and then returned to the room at 25 ℃ for 30 minutes. Then, the temperature of the outermost surface of the roll after being placed in the room is measured by the temperature sensor. Here, the change amount of the coil temperature is set to T2(° c), and T2 ═ from (the membrane temperature after 30 minutes of returning to the room) - (the membrane temperature in the room (25 ℃).
Reference to evaluation
◎：T2≤5℃
○：5℃＜T2≤7℃
△：7℃＜T2
(chain deformation)
After the package 9 to 15 was returned to a room at 25 ℃ and left for 30 minutes, the presence or absence of chain-like distortion in the outermost layer of the film roll was visually confirmed. Then, the chain deformation was evaluated based on the following evaluation criteria.
Reference to evaluation
Very good: no deformation was confirmed.
O: some deformation was confirmed, but there was no problem in practical use because of elastic deformation.
And (delta): 1-2 strand-like deformations were observed.
Table 2 shows the results of evaluation of the package bodies 9 to 15. Table 2 also shows the correspondence between the package bodies 9 to 15 and the examples and comparative examples.
[ Table 2]
Figure BDA0003267524060000151
As shown in table 2, the package bodies 10 to 15 were prevented from increasing in temperature immediately after being exposed to the outside, and were not deformed like a chain even after being left for a certain period of time after that. Wherein, in the package bodies 13-15 with the coverage rate of more than 50%, the elastic deformation of the roll is confirmed after the package bodies are placed indoors. This is considered to be because, in a package body having a large coverage, the area packed with a heat-insulating packaging material is large, and the area packed with a transparent film other than the packaging material is small, so that the efficiency of diffusion (heat dissipation) of heat inside the package body to the outside is reduced, and heat is accumulated inside the package body even after the package body is placed indoors. In particular, elastic deformation is different from plastic deformation such as chain deformation, and if the film is fed out from a roll, the film disappears (no stress is applied), and therefore the elastic deformation does not cause a problem in use of the film.
As described above, the coverage P particularly affects the elastic deformation of the roll when the package is returned to the room after being exposed to the outside, and if the coverage P is 10% or more and 50% or less, the heat insulating effect of the packaging material and the heat radiating effect of the transparent sheet can be obtained in a balanced manner, and the effect of suppressing the elastic deformation is excellent.
In the package body 9 having the coverage P of 0%, it was confirmed that when the package body 9 was exposed to the outside for 60 minutes, the chain-like deformation occurred in the outermost layer of the coil, and thereafter, the chain-like deformation remained even when the package body 9 was returned to the inside of the room.
< manufacture of package body 16 >
The outermost layer of the film roll used for the production of the package 1 is covered with a wrapping material (heat insulating sheet), and the film roll is stored in the holder of fig. 2 in this state. As the packaging material, a metal sheet (30 μm thick, manufactured by japan martai corporation) made of the same material as the packaging material used for manufacturing the package body 1 was used. Then, the holder was wrapped with a wrapping material in the same manner as in the production of the package 11 (with the coverage P being 30%), to produce the package 16. Therefore, in the package 16, the thickness of the packing material is 30 μm, which is the thickness of the packing material.
< manufacture of bag body 17-19 >
The package bodies 17 and 19 were produced in the same manner as the package body 16 except that the thickness of the packing material and the thickness of the wrapping material were changed as shown in table 3. In the same manner as in the case of the package 11, the package 18 is produced such that the outermost layer of the film roll is not covered with the wrapping material.
< evaluation >
(volume temperature Change 1)
The prepared package 16 to 19 was stored at 25 ℃ in a room, and then was taken out to the outside of the room where the temperature was 30 ℃ and the package was exposed to direct sunlight for 60 minutes. Then, the temperature of the outermost surface of the roll after being placed outdoors is measured by the temperature sensor. Here, if the amount of change in the coil temperature is T1(° c), it is defined as T1 ═ (membrane temperature after leaving for 60 minutes) - (membrane temperature in the room (25 ℃)).
Reference to evaluation
◎：T1≤7℃
○：7℃＜T1≤10℃
△：10℃＜T1≤15℃
(volume temperature Change 3)
The package 16 to 19 was further left at 30 ℃ for 30 minutes (total of 90 minutes), and the temperature of the outermost surface of the subsequent roll was measured by the temperature sensor. Here, if the amount of change in the coil temperature is T3(° c), it is defined as T3 ═ (membrane temperature after leaving for 90 minutes) - (membrane temperature in the room (25 ℃)).
Reference to evaluation
◎：T3≤10℃
○：10℃＜T3
(volume temperature Change 4)
The package 16 to 19 was further left at 30 ℃ for 30 minutes (total 120 minutes), and the temperature of the outermost surface of the subsequent roll was measured by the temperature sensor. Here, if the amount of change in the coil temperature is T4(° c), it is defined as T4 ═ (membrane temperature after leaving for 120 minutes) - (membrane temperature in the room (25 ℃)).
Reference to evaluation
◎：T4≤10℃
○：10℃＜T4≤15℃
△：15℃＜T4
(chain deformation)
After the prepared packages 16 to 19 were left outdoors for a total of 120 minutes, the presence or absence of chain-like deformation in the outermost layer of the film roll was visually confirmed. Then, the chain deformation was evaluated based on the following evaluation criteria.
Reference to evaluation
Very good: no deformation was confirmed.
O ^ O: some deformation was confirmed in a part of the range, but there was no problem in practical use because it was elastically deformed.
O: although some deformation was confirmed in a wide range, there was no problem in practical use because of elastic deformation.
Table 3 shows the results of the evaluation of the package bodies 16 to 19. Table 3 also shows the correspondence between the package bodies 16 to 19 and the examples and comparative examples.
[ Table 3]
Figure BDA0003267524060000181
As shown in table 3, in any of the package bodies 16 to 19, the temperature rise of the coil was suppressed and no chain-like deformation was observed after 60 minutes, 90 minutes, and 120 minutes after the exposure to the outside. However, if the thickness of the wrapping material is equal to or less than the thickness of the packaging material, the temperature of the roll increases and elastic deformation tends to occur as the wrapping material is exposed to the outside for a longer period of time. This is considered to be because if the thickness of the packaging material is small, the heat insulating effect of the packaging material is reduced, and the temperature of the roll is likely to increase. Therefore, in order to suppress elastic deformation of the roll, the thickness of the wrapping material is preferably larger than the thickness of the packing material.
Note that, as the packing material and the packaging material, the heat insulating sheet (bubble cushion sheet with metal film) used for the production of the package 8 was used, and the thickness of the packing material and the packaging material was changed in the same manner as in the packages 16 to 19, and the temperature of the roll after exposure to the outdoor environment and the presence or absence of deformation were checked in the same manner as described above, and the same results as in table 3 were obtained.
In the above examples, the TAC film was used as the optical film constituting the film roll, but it was confirmed that the same tendency as in the above examples was present even when the optical film was formed using a cellulose ester resin other than TAC, a cycloolefin resin, a polyimide resin, a polyarylate resin, or the like, and the film roll was formed by winding the optical film, and the package body was formed by combining the film roll with the holder and the packaging material.
[ supplement ]
The embodiments of the present invention have been described above, but the scope of the present invention is not limited to these, and various modifications can be added without departing from the scope of the present invention.
The package of the film roll of the present embodiment described above can be expressed as follows.
1. A package of a film roll is characterized by comprising:
a film roll which is a wound body formed by winding a long optical film made of a thermoplastic resin around a winding core;
a holder capable of holding the film roll inside via the winding core so that the outermost layer of the film roll does not contact other portions;
and a packaging material having heat insulation properties, wherein the holder is packaged so as to cover a vertically upper portion or a vertically lower portion of the film roll, and at least a portion of the holder in the vertical direction is packaged so as to cover the film roll from a side.
2. The package of film rolls according to claim 1, wherein when the length of the holder in the vertical direction is H (mm) and the length of the packaging material wrapped around at least a part of the holder in the vertical direction is X (mm),
the coverage ratio P defined by the following formula is 10% or more and 50% or less,
P＝(X/H)×100。
3. the package of a film roll according to claim 1 or 2, comprising a heat-insulating wrapping material covering at least a part of the outermost layer of the film roll,
the thickness of the wrapping material is greater than the thickness of the bale material.
Industrial applicability
The present invention can be applied to a package of a film roll in which a film roll is stored inside a holder and the holder is wrapped with a wrapping material.
Description of the reference numerals
1, packaging;
2, rolling the film;
2a an axial core;
2b the outermost layer;
3, a bracket;
5, packaging materials;
10 an optical film;
41 packaging the material.

Claims (2)

1. A package of a film roll is characterized by comprising:
a film roll which is a wound body formed by winding a long optical film made of a thermoplastic resin around a winding core;
a holder capable of holding the film roll inside via the winding core so that the outermost layer of the film roll does not contact other portions;
a packaging material having heat insulation properties, wherein the holder is packaged so as to cover a vertically upper portion or a vertically lower portion of the film roll, and at least a portion of the holder in a vertical direction is packaged so as to cover the film roll from a side,
in the holder, a portion not wrapped by the baling material is wrapped with a transparent sheet,
a coverage ratio P defined by the following formula is 10% or more and 50% or less when the length of the rack in the vertical direction is H (mm) and the length of the packing material wrapped around at least a part of the rack in the vertical direction is X (mm),
P＝(X/H)×100。
2. the package of film rolls of claim 1,
the packaging material has heat insulation properties and covers at least a part of the outermost layer of the film roll,
the thickness of the wrapping material is greater than the thickness of the bale material.
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