WO2023095293A1 - シート材容器 - Google Patents

シート材容器 Download PDF

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Publication number
WO2023095293A1
WO2023095293A1 PCT/JP2021/043429 JP2021043429W WO2023095293A1 WO 2023095293 A1 WO2023095293 A1 WO 2023095293A1 JP 2021043429 W JP2021043429 W JP 2021043429W WO 2023095293 A1 WO2023095293 A1 WO 2023095293A1
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WO
WIPO (PCT)
Prior art keywords
film
sheet material
resin film
layer
colored
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.)
Ceased
Application number
PCT/JP2021/043429
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English (en)
French (fr)
Japanese (ja)
Inventor
貴博 大塚
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.)
Kao Corp
Original Assignee
Kao Corp
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Filing date
Publication date
Application filed by Kao Corp filed Critical Kao Corp
Priority to PCT/JP2021/043429 priority Critical patent/WO2023095293A1/ja
Priority to JP2023563451A priority patent/JPWO2023095293A1/ja
Publication of WO2023095293A1 publication Critical patent/WO2023095293A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B65D29/00—Sacks or like containers made of fabrics; Flexible containers of open-work, e.g. net-like construction
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging

Definitions

  • the present invention relates to sheet material containers and container-packed products.
  • Patent Literature 1 discloses a sheet material container including an inner container for containing a content, and a cover that covers the inner container and is composed of a cover-constituting sheet material in which a plurality of film layers are laminated.
  • this cover-constituting sheet material there is a film region (joint region) where a plurality of film layers are joined together, and a filler such as air exists between the plurality of film layers to provide more coverage than the film region.
  • a sheet material container includes a filling material enclosing portion that bulges in the thickness direction of the body-constituting sheet material, and further includes an external air introduction portion that introduces external air between the inner container and the cover.
  • Patent Document 1 Japanese Patent No. 6193535
  • the present invention provides a sheet material container composed of a sheet material containing neither a metal foil nor a metal-deposited film, in which a plurality of resin films are laminated, wherein the sheet material comprises a first film and a second film. and a film, wherein the sheet material is folded such that the first film is disposed outside the second film in the sheet material container, and at least part of the peripheral edges are joined together.
  • a bag is formed to form a storage area for storing a content inside the second film, and between the first film and the second film, the first film and the second film are formed.
  • the film includes a colored resin film layer, which is a resin film layer colored with a coloring component and having a refractive index of 1.8 or more, over at least the entire surface of the container body region surrounding the containing region, and further enclosing the filler. It relates to a sheet material container in which a section is provided at least in the container body region.
  • FIG. 1 is a perspective view of a sheet material container according to a first embodiment of the present invention
  • FIG. 2 is a partial cross-sectional view of the sheet material along line II-II in the sheet material container of FIG. 1
  • FIG. FIG. 6 is a partial cross-sectional view of a sheet material forming a sheet material container according to a second embodiment of the present invention
  • FIG. 11 is a partial cross-sectional view of a modification of the sheet material forming the sheet material container according to the second embodiment of the present invention
  • FIG. 10 is a partial cross-sectional view of another modified example of the sheet material forming the sheet material container according to the second embodiment of the present invention
  • FIG. 10 is a partial cross-sectional view of still another modified example of the sheet material forming the sheet material container according to the second embodiment of the present invention
  • FIG. 11 is a perspective view of a modification of the sheet material container according to the second embodiment of the present invention
  • FIG. 8 is a partial cross-sectional view of a sheet material and a protective cover forming the sheet material container of FIG. 7;
  • the sheet material container described in Patent Literature 1 is provided with rigidity by enclosing the filler in the filler enclosing portion, and the structure is maintained, so that the thickness of the sheet material can be reduced.
  • the filler is removed from the filler enclosing part to lose its rigidity and the container can be crushed into a small size, so that the amount and volume of waste can be reduced.
  • further improvements in recyclability and the like are required for such sheet material containers.
  • the sheet material container described in Patent Document 1 is excellent in that it can reduce the amount and volume of waste, but in particular, the light shielding property against the contents and the sheet material container. There is room for further improvement in terms of compatibility with the quality of recycled resins recycled from waste.
  • a sheet material container that maintains the rigidity of the container, has excellent light shielding properties against the contents, and is capable of obtaining high-quality recycled resin by recycling, and the sheet material container is used. can provide packaged products.
  • FIG. A sheet material container according to the present invention is composed of a sheet material in which a plurality of resin films are laminated and which does not contain either a metal foil or a metal-deposited film, and includes the following embodiments.
  • a sheet material container 100 according to the present embodiment has a configuration as shown in FIGS. 1 and 2, for example.
  • the sheet material container 100 according to the present embodiment is a sheet material container 100 configured by a sheet material 200 including neither metal foil nor metal deposited film, in which a plurality of resin films are laminated.
  • This sheet material 200 includes a first film 1 and a second film 2 as resin films. Then, the sheet material 200 is folded so that the first film 1 is disposed outside the second film 2 in the sheet material container 100, and at least part of the peripheral edge portions are joined to form a bag.
  • An accommodation area 61 is formed inside the second film 2 to accommodate an object.
  • a filler enclosing portion 5 which is a joint and encloses a filler and protrudes in the thickness direction of the sheet material 200 from the film joint portion 6 (FIG. 2).
  • the first film 1 or the second film 2 is a resin film layer colored with a coloring component and having a refractive index of 1.8 or more over at least the entire surface of the container body region 63 surrounding the housing region 61. Including the resin film layer 11a or 21a, the filling material enclosing portion 5 described above is provided at least in the container main body region 63 .
  • a non-bonded region may be provided between the first film 1 and the second film 2, in addition to the film-bonded portion 6 and the filler enclosing portion 5, a non-bonded region may be provided.
  • the above-described “metal foil” means a thin film of metal.
  • the above-mentioned “metal vapor deposition film” is a film such as an aluminum vapor deposition film, in which a metal is heated and evaporated by an electron beam or high frequency induction in a high vacuum state, and the vapor is deposited (deposited) on the surface.
  • the sheet material 200 forming the sheet material container 100 according to the present embodiment may include a deposited film of inorganic oxide.
  • the sheet material container 100 can be produced, for example, by the following method. First, a first film 1 and a second film 2, both of which do not contain a metal foil or a metal-deposited film and at least one of which contains the colored resin film layer 11a or 21a, are laminated and partially joined. If necessary, another resin film that does not contain a metal foil or a metal-deposited film is further laminated to form a sheet material 200 in which the filler enclosing part 5 is formed between the first film 1 and the second film 2. make.
  • the sheet material 200 is arranged so that the first film 1 is arranged outside the second film 2 (on the outside of the container), and at the same time, the entire surface of the container main body region 63 includes the colored resin film layer 11a or 21a.
  • the sheet material 200 is folded so that at least a portion of the filler enclosing portion 5 is disposed in the container main body region 63, and at least a portion of the peripheral edge portions of the sheet material 200 are bonded to each other by heat sealing or the like to form a bag and form a storage region.
  • a member containing metal may be added to the sheet material container 100 according to the present embodiment as long as the sheet material 200 does not contain a metal foil or a metal-deposited film.
  • the member containing the added metal is configured to be separable from the sheet material 200, for example, by attaching a label or the like containing an aluminum deposition film to the surface of the sheet material 200.
  • FIG. Note that from the viewpoint of ease of recycling the sheet material container 100 according to the present embodiment, the sheet material container 100 according to the present embodiment as a whole does not contain any metal foil or metallized film (the sheet material container 100 It is more preferable that both the sheet material 200 forming the A configuration is more preferred.
  • the filling material enclosing part 5 is a peripheral edge of the container main body region 63 (the body part 106, part of the top gusset part 104, etc.) of the sheet material container 100 according to the present embodiment. etc. are formed so as to be connected. Then, before or after accommodation of the contents, a non-bonded region provided integrally with, for example, a resin film forming the sheet material 200 and communicating with the filler enclosure 5 is provided in the filler enclosure 5 .
  • the filler is introduced from the filler introducing portion that reaches the outer edge, and the filler enclosing portion 5 expands in the thickness direction of the sheet material 200 as shown in FIG. Rigidity is imparted to the container body.
  • the container body is endowed with high self-supporting property, compressive strength, squeeze back property, and the like.
  • the amount of resin used for the sheet material 200 can be reduced, that is, the sheet material 200 can be made thinner.
  • This filler introduction part is sealed by an appropriate method after the filler is introduced, and is excised if necessary.
  • the filler encapsulating part 5 may be formed independently of each other instead of being connected as described above. Moreover, the filler enclosing part 5 may be formed at least in a part of the container main body region 63, and may be formed in other regions. After the contents contained in the sheet material container 100 are used up, the container main body loses its rigidity by removing the filler from the filler enclosing part 5. Therefore, the sheet material container 100 according to the present embodiment is used. It can be easily crushed into small pieces. As a result, the amount and volume of waste can be reduced, and a reduction in environmental load can be expected.
  • the filler enclosed in the filler enclosing portion 5 can be fluid (gas or liquid), solid (for example, granular material, resin pellets, etc.), or semi-solid (for example, foam material, etc.). It is more preferable that the filler enclosed in the material enclosure 5 is gas.
  • the filler enclosing portion 5 in which the filler is enclosed becomes a gas layer, and the gas layer and the colored resin film layer 11a or 21a included in the first film 1 or the second film 2 sandwiching the gas layer. This is because the light shielding property against the stored object is further enhanced by the combination.
  • the gas used as the filler include air, nitrogen, oxygen, inert gases (argon, helium, etc.), etc. Air is preferably used from the viewpoint of cost.
  • the internal pressure of the filler enclosure 5 is not limited, but from the viewpoint of imparting sufficient rigidity to the sheet material container 100, for example, it is preferably 10 kPa or more in terms of gauge pressure, such as 20 kPa. It is more preferable that it is above. It is preferably 500 kPa or less, more preferably 100 kPa or less.
  • the second film 2 is arranged inside the first film 1 (inside the container), such as the shape shown in FIG. Having a storage area 61 which is an area and has a form in which the stored material directly contacts the second film 2 or the stored material directly contacts another resin film arranged inside the second film 2,
  • the sheet material container 100 may be provided with a bottom gusset 103 that serves as the bottom of the container so that it can stand on its own as shown in FIG.
  • a top gusset portion 104 that serves as a top surface of the container may be provided at the end opposite to the bottom gusset portion 103 .
  • a skirt portion 108 is provided on the bottom side of the container (for example, the side end of the bottom gusset portion 103 that becomes the bottom of the container when it stands on its own). It's okay to be there.
  • the sheet material container 100 according to this embodiment may be an embodiment assuming that it is laid down on the front side or the rear side of the container body.
  • the skirt portion 108 described above may have, for example, the following configuration.
  • the sheet material 200 constituting the front surface of the container body and the rear surface are formed on the side edges of the body portion 106 which is the container body region 63 on the front side or the rear side of the container body.
  • a side seal portion 101 is formed by joining the side edges of the sheet material 200 to extend vertically, that is, in the vertical direction when the bottom side of the container is downward.
  • a front lower skirt sheet and a rear lower skirt sheet, which are formed of a part of the sheet material 200, are arranged below the side seal portion 101, and the front lower skirt sheet and the rear lower skirt sheet are arranged.
  • a front and rear seal portion is formed by joining the side edges to the rear lower skirt sheet.
  • the front lower skirt sheet and the rear lower skirt sheet are connected via the front and rear seal portions to form a skirt portion 108 arranged at the side end of the bottom portion of the sheet material container 100 .
  • the “lower side” is the container bottom side of the sheet material container 100 .
  • the front and rear seal portions are preferably formed continuously with the side seal portions 101. As shown in FIG. In other words, it is preferable that the sealing surfaces of the side seal portions 101 and the sealing surfaces of the front and rear seal portions are connected to each other.
  • the sheet material container 100 is provided with an opening 70 for receiving or discharging the contents.
  • a spout 81 may be provided which may be sealed by a pumped cap or the like comprising portion 71 and head portion 73 .
  • the spout 81 is made of the same resin material as any of the films constituting the sheet material 200, or is configured to be easily separated from the sheet material 200. is preferred.
  • the spout 81 may be provided with a screw thread for sealing the opening 70 described above.
  • the opening 70 is a non-bonded portion between the sheet materials 200 in the storage area 61, and the contents are accommodated from this non-bonded portion, ultrasonically sealed, and bonded with a bonding agent.
  • the non-bonded portion is sealed by sealing, heat sealing, or the like, which can be appropriately selected according to the form of the container body, the configuration of the sheet material 200, and the like.
  • the sheet material container 100 has a configuration in which the sheet material 200 is arranged with the second film 2 closest to the inside of the container. It may be an embodiment (first embodiment) in which the region 61 is formed, or the sheet material 200 further includes a third film 3 arranged inside the second film 2, and the third film 3
  • the third film 3 is also colored with a coloring component and has a refractive index of 1.8 or more over at least the entire surface of the container body region 63 surrounding the accommodation region 61.
  • An embodiment (second embodiment) including a colored resin film layer 31a, which is a resin film layer, may also be used.
  • This second embodiment comprises a first film 1, a second film 2 disposed on the inside of the container of the first film 1 and joined to the first film 1, and a film on the inside of the container of the second film 2.
  • the sheet material 200 is formed by laminating a plurality of resin films including the arranged third film 3 . Inside the third film 3 , there is a storage area 61 formed by joining at least a part of the peripheral edges of the third film 3 to form a bag. That is, the sheet material container 100 is provided with the inner container 120 formed of the third film 3 .
  • the third film 3 including the colored resin film layer 31a serves as the inner container 120, the light-shielding property against the contents is further enhanced, and the contents can be discharged by squeezing or pumping. It's getting easier.
  • the third film 3 forming the inner container 120 may be provided with the spout 81 or the like described above as the opening 70 .
  • the third film 3 and the second film 2 are completely unbonded, or when at least part of the peripheral edge portions of the third film 3 and the second film 2 are bonded to each other, When using the contents, the inner container 120 is easily contracted, and the contents can be easily discharged to the end.
  • the third film 3 serving as the inner container 120 is held inside the second film 2 .
  • an outside air introducing portion for introducing outside air may be provided.
  • the sheet material container 100 further includes a protective cover 300 made of a resin film and covering at least a part of the outer surface of the container main body region 63.
  • a protective cover 300 made of a resin film and covering at least a part of the outer surface of the container main body region 63.
  • the gap (air layer 306 ) between the protective cover 300 and the sheet material 200 in the container body region 63 further enhances the light shielding property against the contents.
  • the protective cover 300 also includes a colored resin film layer 301 which is a resin film layer colored with a coloring component and having a refractive index of 1.8 or more, the light shielding property is further enhanced, which is preferable.
  • the protective cover 300 can also reinforce the container body.
  • the protective cover 300 covers the entire outer surface (entire surface) of the container body region 63 is more preferable. Furthermore, since the sheet material container 100 according to the present embodiment has a structure having rigidity due to the filler enclosing part 5, the protective cover 300 is stabilized compared to a general soft packaging container that does not have the filler enclosing part 5. The protective cover 300 can be easily attached, and twisting of the protective cover 300 can be suppressed.
  • the protective cover 300 examples include shrink films (shrink labels), stretch films (stretch labels), roll labels, and the like.
  • the protective cover 300 is attached so as to be removable from the container body.
  • this detachable structure there is an embodiment that can be peeled off or broken simply by physical force, and an embodiment in which perforations 308 for breaking the protective cover 300 are formed, as shown in FIG. 7, for example. etc. are exemplified.
  • the protective cover 300 is a shrink film
  • a shrink film that has been formed in a cylindrical shape in advance is placed over the trunk portion 106 and the like, and then the shrink film is shrunk to bring the shrink film into close contact with the trunk portion 106 and the like. Installing.
  • the protective cover 300 is a stretch film
  • a stretch film formed in a tubular shape in advance is put over the trunk portion 106 or the like, and the stretch film is stretched over the trunk portion 106 or the like by the elasticity (rubber elasticity or the like) of the stretch film. It is worn in close contact.
  • the protective cover 300 is a roll label
  • the roll label is wrapped around the body portion 106 or the like, and one end and the other end of the roll label are pasted with an adhesive or the like, and the roll label is attached to the body portion 106 . etc. Details of the layer structure of the protective cover 300 will be described later.
  • the sheet material container 100 it is possible to obtain a container-packed product in which the contents are stored in the storage area 61 .
  • the contents are discharged from the opening 70 by squeezing, pumping, or the like.
  • the types of items to be stored in the sheet material container 100 according to the present embodiment are not particularly limited. oil and the like.
  • the content may be liquid (including paste) or solid (for example, granular (including granular) or powder). good.
  • its viscosity at 30° C. is preferably 1 mPa ⁇ s or more, preferably 120,000 mPa ⁇ s or less, and 60,000 mPa ⁇ s or less. (both are measured with a Brookfield viscometer (for example, Viscometer TV-10 or Viscometer TVB-10 manufactured by Toki Sangyo Co., Ltd.)).
  • FIGS. 3 to 6 in order to clearly show the embodiment of the sheet material constituting the sheet material container according to the present invention, for the sake of convenience, the first film and the second film are separated. Although shown in the drawing, in a state in which these films are bonded together, the films may be in contact with each other in a non-bonded manner in the filler enclosing portion and the non-bonded region before the filler is enclosed. Similarly, the third film may be in contact with the second film without bonding, and the same applies to FIG. 8 described later.
  • the sheet material 200 constituting the sheet material container 100 according to the present embodiment has a configuration in which a plurality of resin films are laminated, and the plurality of resin films include at least a first film 1 and a second film 2. is included.
  • the sheet material 200 does not contain either a metal foil or a metal-deposited film, which may cause a deterioration in physical properties, etc. when the resin is recycled.
  • the film joint portion 6 where the first film 1 and the second film 2 are joined, and the first film 1 and the second film 2. 2 film 2 is not joined, and a filler enclosing part 5 in which a filler is enclosed.
  • the film bonding portion 6 can be formed by heat sealing, a bonding agent, or the like.
  • the formation of the filler enclosing portion 5, which is a non-bonded portion is performed by pattern heating in the case of forming the film bonding portion 6 by heat sealing, or by pattern coating of a bonding agent in the case of forming the film bonding portion 6 with a bonding agent. or by using a sizing agent.
  • the sheet material container 100 according to the present embodiment can be provided with rigidity even before the contents are accommodated.
  • the heat sealing conditions for forming the film bonding portion 6 by heat sealing can be appropriately set depending on the characteristics of the resin material constituting the first film 1 and the second film 2.
  • the temperature is 110° C. or higher.
  • Preferred heat sealing conditions include a sealing temperature of 230° C. or less, a sealing pressure of 0.1 MPa or more and 1.0 MPa or less, and a sealing time of 0.1 seconds or more and 10 seconds or less.
  • the heat-sealing conditions described below may be the same, and the heat-sealing conditions described above may also be the same.
  • first film 1 and the second film 2 are colored with a coloring component and have a refractive index of 1.8 over at least the entire surface of the container body region 63 surrounding the housing region 61 .
  • the colored resin film layer 11a or 21a which is the above resin film layer, is included. That is, the first film 1 included in the sheet material 200 of the container body region 63 includes the colored resin film layer 11a over its entire surface, or the second film 2 included in the sheet material 200 of the container body region 63 includes its entire surface. or the colored resin film layer 21a described above, or both.
  • the lower limit of this refractive index is preferably 1.9 or more, more preferably 2.0 or more.
  • the upper limit of the refractive index is not limited, but may be 3.0 or less, or may be 2.8 or less.
  • Each of the colored resin film layers 11a and 21a may be a single layer composed of a colored resin, or may be a multiple layer in which a plurality of layers composed of a colored resin are successively laminated. However, in the case of this multiple layer, it is sufficient that the entire multiple layer has a refractive index of 1.8 or more. In the case of this multiple layer, it is more preferable that each of the layers composed of a plurality of colored resins contained therein has a refractive index of 1.8 or more.
  • Both of the colored resin film layers 11a and 21a are resin film layers that serve as base materials other than the colored resin film layers in the first film 1 or the second film 2 as shown in FIGS. 2 to 6 and 8. In this case, it suffices that each of the plurality of colored resin film layers included in the film has a refractive index of 1.8 or more.
  • the filler enclosing part 5 is provided at least in the container main body region 63 . In other words, the configuration is such that the filler enclosing portion 5 is provided in a region including at least the colored resin film layer 11a or 21a.
  • the sheet material container 100 By combining the colored resin film layer 11a or 21a and the filler enclosing part 5, the sheet material container 100 according to the present embodiment can be obtained by using the sheet material 200 that constitutes the container as a metal foil or a metal deposition film. Even with a configuration that does not contain the material, the light shielding property against the contents is excellent, and the thin-walled container has a high light shielding property. In addition, areas that are difficult to cover with light-shielding shrink films (for example, peripheral areas of the openings 70) also have sufficient light-shielding properties. Therefore, the degree of freedom in designing the shrink film or the like is further enhanced. Further, by recycling the sheet material 200, it is possible to obtain high-quality recycled resin (recycled resin).
  • the "container main body area 63" is the area of the sheet material 200 surrounding the containing area 61 in the packaging container 100, that is, the sheet on the surface facing the containing area 61 (the surface surrounding the contents). It is a region formed by the material 200 . Therefore, the area formed by the sheet material 200 on the surface not facing the containing area 61 and not surrounding the contained object, such as the area of the sheet material 200 forming the side seal portion 101 or the skirt portion 108, for example. not meant to include
  • the "whole surface” means substantially the entire surface, and in the above description, the surface forming the container main body region 63 may be 95% or more, more preferably 98% or more, and 99% or more. It is more preferable to have The same is true for others.
  • the refractive index of the colored resin film layers 11a and 21a is the refractive index of the resin film layer measured by a method conforming to JIS K7142:2014. The same applies to the refractive indices of the colored resin film layer 31a and the colored resin film layer 301 described above, and the non-colored resin film layers 11c and 21c described later.
  • the coloring component is not particularly limited as long as it is a component capable of coloring the resin film layer.
  • the material constituting the resin film layers (including the colored resin film layers 11a and 21a) included in the first film 1 and the second film 2 is not particularly limited as long as it is a resin material, but the sheet according to the present embodiment From the viewpoint of ease of recycling the material container 100 into recycled resin, the resin film layer is made of polyolefin resin (polyethylene resin, polypropylene resin, etc.), polyester resin, or polyamide resin. is preferred.
  • Polyethylene-based resins include high-density polyethylene (HDPE), medium-density polyethylene (MDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), and ultra-low-density polyethylene (ULDPE).
  • Oriented uniaxially oriented polyethylene OPE
  • biaxially oriented polyethylene BOPE
  • ethylene vinyl alcohol copolymer EVOH
  • BioPE biopolyethylene
  • modified PE modified polyethylene
  • modified PE For example, maleic anhydride-modified polyethylene, etc.
  • recycled polyethylene obtained by washing and melting a film or container made of a polyethylene-based resin, and the like. And you may use these in mixture of 2 or more types.
  • the resin film layers contained in the first film 1 and the second film 2 are both made of a polyolefin resin, more preferably a polyethylene resin, that is, a single type of polyolefin resin, more preferably a polyethylene resin. If it is composed of a single type, it is possible to easily perform bonding between laminations and bonding between films by heat sealing, and it is preferable because there is no need to form a sealant layer for laminating bonding. Furthermore, recycling of the sheet material 200 into recycled resin becomes easier.
  • Polyester resins include polyethylene terephthalate (PET), amorphous polyethylene terephthalate (amorphous PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), and the like. be done.
  • Polyamide resins include nylon 6, nylon 11, nylon 12, nylon 46, nylon 66 and the like.
  • the plurality of resin films including the first film 1, the second film 2, and the third film 3 included in the sheet material 200 is composed of a polyolefin resin, more preferably a polyethylene resin, i.e., composed of a single type of polyolefin resin, more preferably a single type of polyethylene resin, joining by heat sealing is easy, Moreover, the quality of the recycled resin obtained by recycling the sheet material container 100 is further improved, which is preferable.
  • this "single type” means a group of resin materials included in a specific single type, for example, high density polyethylene (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE) , linear low density polyethylene (LLDPE), ultra low density polyethylene (ULDPE), uniaxially oriented polyethylene (OPE) obtained by stretching any of these, biaxially oriented polyethylene (BOPE), ethylene vinyl alcohol copolymer (EVOH) , bio-polyethylene (BioPE), modified polyethylene (modified PE), etc. are all included in a single type of polyethylene-based resin.
  • Non-oriented polypropylene (CPP), oriented polypropylene (OPP) and the like are all included in a single type of polypropylene-based resin.
  • consisting of a single type means, for example, in the case of a single type of polyethylene resin, a group consisting of HDPE, MDPE, LDPE, LLDPE, ULDPE, OPE, BOPE, EVOH, BioPE, and modified PE. It means that it is composed of one or more selected from the group consisting of polyethylene-based resins. Even in such a configuration, the resin film layer layers and surfaces (the surface of each film on the outside of the container or the inside of the container) include a coating layer and a bonding layer made of other materials. Also good. In addition, surface treatment such as corona treatment or plasma treatment may be applied.
  • the film contained in the sheet material 200 is a specific single type of resin.
  • Embodiments that are substantially free of materials other than raw materials are preferred.
  • the term "substantially free” means less than 1% by mass, preferably less than 0.5%, and most preferably 0%. The same is true for others.
  • both the first film 1 and the second film 2 of the sheet material 200 include colored resin film layers 11a and 21a over at least the entire surface of the container body region 63.
  • the first film 1 includes the colored resin film layer 11a over at least the entire surface of the container body region 63
  • the second film 2 includes the colored resin film layer 21a over at least the entire surface of the container body region 63.
  • the colored resin film layers 11a and 21a sandwich the filler enclosing part 5, and the amount of light incident from the outside of the container is reflected between the layers sandwiching the filler enclosing part 5, and the light shielding property against the contents is improved. because it rises.
  • the structure in which the filler enclosing portion 5 is sandwiched between the colored resin film layers 11a and 21a is a single colored resin film layer having a layer thickness that is the sum of the layer thicknesses of the colored resin film layers 11a and 21a.
  • Light shielding is higher than that used in layers. Therefore, with such a configuration, it is possible to further reduce the layer thickness of the colored resin film layer for securing the necessary light shielding properties for protecting the stored items, and it is possible to further reduce the amount of resin. Become.
  • the colored resin film included in the entire surface of the container body region 63 At least part of the layers 11a and 21a is arranged on the inner surface side of the container when the first film 1 is divided into two equal parts at the center of the film thickness D1 (film thickness center), and the film thickness of the second film 2 is It is more preferable that the film is arranged on the outer surface side of the container when it is divided into two equal parts at the center of D2 (the center of the film thickness).
  • the container main body region 63 at least part of the colored resin film layer 11a included in the first film 1 is arranged on the inner surface side of the container when the first film 1 is divided into two equal parts at the center of the film thickness D1. and at least part of the colored resin film layer 21a included in the second film 2 is arranged on the outer surface side of the container when the film thickness D2 of the second film 2 is divided into two at the center. is more preferred. Since both the colored resin film layers 11a and 21a are arranged closer to the filler enclosing portion 5 in the region where the filler enclosing portion 5 of the container main body region 63 is formed, the filler enclosing portion 5 is removed.
  • the center of the film thickness D1 laminate center: the bonding surface between the second colored resin film layer 11a and the third gas barrier layer 11b from the outside of the container
  • a part of the colored resin film layer 11a is arranged on the inner surface side of the container when bisected by the line shown), that is, on the side closer to the filler enclosing part 5, and the center of the film thickness D2 in the second film 2 (Lamination center: the same as the center of the layer thickness of the gas barrier layer 21b that is the second layer from the outside of the container). part of is placed.
  • At least part of the colored resin film layer 21a is arranged on the outer surface of the container when the second film 2 is divided into two equal parts at the center of the film thickness.
  • the "film thickness” means the thickness of the entire film including all layers constituting the film such as the substrate layer, the coating layer and the adhesive layer.
  • the first film 1 or the second film 2 is formed by laminating and bonding a plurality of resin film layers. It is preferable that the colored resin film layers 11a or 21a included in the film 2 are laminated and joined such that the difference in refractive index between adjacent resin film layers is 0.2 or more.
  • the entire surface of the container body region 63 includes a colored resin film layer 11a or 21a as a resin film layer with a high refractive index, and a resin film layer with a low refractive index (for example, a non-colored resin film layer) as an adjacent resin film layer. ) is preferable. Further, it is more preferable that both the first film 1 and the second film 2 have the above structure.
  • This refractive index difference is more preferably 0.3 or more, more preferably 0.4 or more.
  • the "adjacent resin film layers" are directly bonded (heat-sealed, etc.) without sandwiching another resin film layer serving as a base material, or bonded via a bonding agent. means the resin film layers that are in contact with each other.
  • the two non-colored resin film layers 11c sandwiching the colored resin film layer 11a having a refractive index of 1.8 or more both have a refractive index of 1.6.
  • the difference in refractive index between the colored resin film layer and the adjacent resin film layer in each film is 0.2 or more,
  • the resin film layers of the adjacent films on the joint surface in the embodiment shown in Figs.
  • the difference in refractive index between the colored resin film layer 11a disposed on the second film 2 and the colored resin film layer 21a) disposed on the outermost side of the second film 2 may be less than 0.2. This is because the filler enclosure 5 is formed between the first film 1 and the second film 2 .
  • the colored resin film layer 11a or 21a is a multilayer in which a plurality of layers made of the colored resin as described above are continuously laminated, the layers made of the colored resin adjacent to each other are separated from each other.
  • the difference in refractive index may be less than 0.2, the difference in refractive index between adjacent layers of the multi-layered colored resin is also 0.2 because the light-shielding property against the stored object is further enhanced. The above is more preferable.
  • the layer of the colored resin film layer 11a or 21a included in the first film 1 or the second film 2 of the sheet material 200 It is preferable that the thickness is larger than the layer thickness of the other resin film layers included in the first film 1 or the second film 2 . That is, the thickest resin film layer in the first film 1 is the colored resin film layer 11a, or the thickest resin film layer in the second film 2 is the colored resin film layer 21a.
  • the form is preferred.
  • both the first film 1 and the second film 2 include the colored resin film layers 11a and 21a, and the layer thicknesses of the colored resin film layers 11a and 21a are both the same as the first film 1 and the second film 2. It is more preferable that the layer thickness is larger than that of the resin film layers other than the colored resin film layers 11a and 21a.
  • the layer thickness of the plurality of colored resin film layers included in the film is larger than the layer thickness of the other resin film layers.
  • the first film 1 and/or the second film 2 of the sheet material 200 is a coextruded laminated resin film including the colored resin film layer 11a or 21a, and the colored resin film layer 11a or 21a is included.
  • the resin film layer 11a or 21a is made of a polyolefin resin. That is, the first film 1, the second film 2, or both of them are co-extruded laminated resin films containing colored resin film layers, and the colored resin film layers contained in the co-extruded laminated resin films are composed of a polyolefin resin.
  • this "co-extruded laminated resin film” means that each resin film layer or resin mixture used for the film is heated and melted in a separate extruder, and if necessary, an anchor layer (adhesive layer) having a layer thickness of less than 10 ⁇ m It is a laminated resin film that is laminated by being co-extruded into a film while using a layer) between the layers.
  • the gas barrier layer 21b is co-extruded and laminated such that the gas barrier layer 21b is sandwiched between the two colored resin film layers 21a to form a laminated resin film.
  • the coextruded laminated resin film includes two or more colored resin film layers 11a or 21a (polyolefin-based (including two or more colored resin film layers made of resin), and each of the two or more colored resin film layers 11a or 21a is a non-colored resin made of a polyolefin resin. It is preferable that the layers are laminated and joined so as to sandwich the non-colored polyolefin resin film layer, which is the film layer.
  • the second film 2 in the embodiment shown in FIG. 2 is a co-extruded laminated resin film
  • the two colored resin film layers 21a are both made of polyolefin resin and sandwiched so as to be in contact with these surfaces.
  • the laminated gas barrier layer 21b is a non-colored polyolefin resin film layer (for example, a non-colored resin film layer made of ethylene-vinyl alcohol copolymer) is exemplified.
  • the polyolefin resin constituting the colored resin film layer 11a or 21a and the non-colored polyolefin resin film layer are all polyethylene resins (for example, Polyethylene resin or ethylene vinyl alcohol copolymer) is more preferred. Further, it is more preferable that the adhesive layer between the layers is also made of polyethylene-based resin. Even if the first film 1 or the second film 2 does not have three or more layers as described above, the colored resin film layer 11a or 21a, the non-colored resin film layer 11c or 21c, and the gas barrier layer 11b or 21b are preferably made of polyolefin-based resin, more preferably polyethylene-based resin. The same applies to the third film 3 described above.
  • both the first film 1 and the second film 2 of the sheet material 200 are , a gas barrier layer (11b or 21b), which is a resin film layer having a gas barrier function, or a gas barrier coating layer (11d or 21d) coated with a material having a gas barrier function.
  • a gas barrier layer 11b or 21b
  • both the first film 1 and the second film 2 include gas barrier layers 11b and 21b.
  • both the first film 1 and the second film 2 include gas barrier coating layers 11d and 21d between the two non-colored resin film layers 11c or 21c. Even if the filler enclosed in the filler enclosing part 5 is not gas, the arrangement as described above may prevent the leakage of aroma components, moisture (water vapor), etc. from the storage area 61 . can be suppressed.
  • the gas barrier layer 11b or 21b is more preferably composed of an ethylene-vinyl alcohol copolymer, which is a polyethylene-based resin, as described above. .
  • Materials having a gas barrier function that can be used for the gas barrier coating layer 11d or 21d include, but are not limited to, polyvinylidene chloride, ethylene-vinyl alcohol copolymer (EVOH), organic (ethylene-vinyl alcohol copolymer). polymerized resin (EVOH)-based)/inorganic (plate-like filler) nanocomposite type materials, organic (vinyl acetate (VA)-based)/inorganic (siloxane polymer) hybrid-type materials, polyvinyl alcohol (PVOH), polyvinyl alcohol (PVOH), and Copolymers with acrylic acid and methyl methacrylate, hydroxypolyurethanes and the like are indicated as suitable.
  • the colored resin film layers 11a, 21a, or 31a included in the first film 1, the second film 2, or the third film 3 of the sheet material 200 constituting the sheet material container 100 according to the present embodiment are Both are preferably colored resin film layers colored milky white or gray. This is because the colored resin film layer has a higher light-shielding property, and the appearance of the sheet material container 100 tends to be favorable. Also, the colored resin film layer 301 included in the protective cover 300, which will be described later, may be the same.
  • a colored resin film layer colored milky white or gray using titanium oxide, zinc oxide, barium sulfate, or carbon black as a coloring component is more preferable from the viewpoint of light shielding properties and recyclability.
  • the use of titanium oxide as the coloring component is more preferable because it is easier to form a colored resin film layer colored milky white, and the use of carbon black as the coloring component is more preferable because it is easier to form a colored resin film layer colored gray.
  • the colored resin film layers 11a, 21a, or 31a included in the first film 1, the second film 2, or the third film 3 of the sheet material 200 constituting the sheet material container 100 according to the present embodiment are also, the colored recycled resin film layer is preferably formed by coloring a recycled resin recycled from a resin material (resin container, resin packaging bag, etc.) with a coloring component. Also, the colored resin film layer 301 included in the protective cover 300, which will be described later, may be the same.
  • the colored recycled resin film layer may be obtained by adding a coloring component to the recycled resin to obtain a colored recycled resin, and using the colored recycled resin to form a resin film layer, or by forming a resin film layer. It may be obtained by adding a recycled resin and a coloring component at the time of formation. Recycled resin may cause yellowing, which is yellowing due to repeated recycling. can be kept high.
  • the colored recycled resin film layer is preferably a colored recycled resin film layer composed of a colored recycled resin colored by adding a masterbatch containing a pigment as a coloring component to the recycled resin. This is because it is easy to stabilize the coloring and light shielding properties of the colored recycled resin film layer.
  • the pigment contained in this masterbatch is one or more selected from the group consisting of green pigments, gray pigments, and milky white pigments, it is more preferable from the viewpoint of light shielding properties and recyclability.
  • a masterbatch containing a green pigment or a gray pigment is used, or a combination of these is used (a layer composed of a colored resin containing a masterbatch of a green pigment and a gray pigment)
  • a masterbatch containing pigments of similar colors to recycled resins that have become greenish or brownish due to residual ink or yellowing.
  • green pigments include chromium oxide and phthalocyanine green.
  • gray pigments include carbon black.
  • milky white pigments include titanium oxide.
  • the resin film including the colored recycled resin film layer is a colored recycled resin film. It is more preferable that the laminated resin film is laminated and joined such that the layers are sandwiched between virgin resin film layers made of virgin resin. This is because the processing suitability of the sheet material 200 is further improved. For example, in the first film 1, the second film 2, and the third film 3 of the sheet material 200 in the embodiment shown in FIG.
  • non-colored resin film layers 11c, 21c, and 31c that are arranged on both surface sides of each film and are laminated so as to sandwich them and are joined to them are all virgin resin film layers, processing suitability and It is more suitable from the viewpoint of preventing contamination during production (prevention of roll contamination, etc.).
  • the sheet material 200 constituting the sheet material container 100 according to the present embodiment is not printed because the quality of the recycled resin obtained by recycling the sheet material 200 is further improved. It is preferable to have Note that the printing may be applied to a protective cover 300 or the like, which will be described later.
  • the thickness of the sheet material 200 constituting the sheet material container 100 according to this embodiment before the filler is enclosed is not limited, but is preferably 50 ⁇ m or more, more preferably 80 ⁇ m or more, and still more preferably. is 100 ⁇ m or more, preferably 300 ⁇ m or less, more preferably 250 ⁇ m or less. Furthermore, the thickness of each film is preferably 15 ⁇ m or more, more preferably 20 ⁇ m or more, still more preferably 30 ⁇ m or more, and preferably 100 ⁇ m or less, more preferably 80 ⁇ m or less.
  • the sheet material container according to the present invention preferably has a structure provided with the protective cover as described above. to explain.
  • the protective cover 300 is made of a resin film and, as shown in FIG. 7, may be configured to cover at least a portion of the outer surface of the container body region 63, more preferably the entire outer surface (entire surface). , others are not limited. As described above, shrink films, stretch films, roll labels, and the like are exemplified as preferred embodiments of the protective cover 300 . Further, as also described above, since the protective cover 300 is detachably attached to the container body, from the viewpoint of improving the recyclability of the sheet material 200, the protective cover 300 is printed and the sheet material More preferably, 200 has no printing. This printing can be applied, for example, by offset printing, screen printing, gravure printing, flexographic printing, or the like.
  • the protective cover 300 may include a metal foil or a metal-deposited film. However, like the sheet material 200, if the protective cover 300 does not contain either the metal foil or the metal-deposited film, the protective cover 300 can be easily recycled, which is more preferable.
  • the protective cover 300 when the protective cover 300 is a shrink film, the protective cover 300 preferably comprises a resin film layer made of PET, OPP, OPS (biaxially oriented polystyrene) or LDPE.
  • the protective cover 300 is preferably made up of a resin film layer made of LLDPE.
  • the protective cover 300 when the protective cover 300 is a roll label, the protective cover 300 preferably comprises a resin film layer made of PP (polypropylene). Further, each resin film layer may be made of recycled resin.
  • the protective cover 300 includes a colored resin film layer 301, which is a resin film layer colored with the above-described coloring component and having a refractive index of 1.8 or more, or a light-shielding printed layer 302 having a light-shielding function (for example, visible light).
  • a configuration including a coating layer or the like in which a material containing ink capable of blocking light rays and ultraviolet rays is solidly printed is preferable. And, for example, as in the embodiment of FIG. 8, a configuration including both of them may be used. This is because the light-shielding property for the contained object is further enhanced.
  • embodiments may include a printed layer 303 (non-light-shielding printed layer) instead of the light-shielded printed layer 302 .
  • the protective cover 300 includes a non-colored resin film layer (for example, a resin film layer made of a transparent resin) may be used.
  • the portion covering the top gusset portion 104 and the portion other than the spout 81 is printed (solid printing) by the light-shielding printing layer 302 on the entire surface. It is preferable to have a structure including the colored resin film layer 301 on the entire surface.
  • the entire surface is printed with the light shielding printed layer 302 (solid printing) or the entire surface includes the colored resin film layer 301.
  • the entire surface is printed with the light shielding printed layer 302 (solid printing) or the colored resin film layer 301 is included on the entire surface.
  • the upper end of the film (the end on the top side of the container before shrinkage) and the bottom end (the end on the bottom side of the container before shrinkage) are The width of about 1.5 mm, for example, 1.0 mm or more and 2.0 mm or less from the side peripheral edge toward the inside (the center part of the container before shrinkage) is an unprinted part where the above printing is not applied, so that the film shrinks. It is possible to suppress wrinkles in the end portion later.
  • gradation printing may be applied to high shrinkage portions of the film (regions such as regions covering the bottom gusset portion 103 and the top gusset portion 104 where the shrinkage rate is higher than others).
  • each film constituting the sheet material 200 in the sheet material container 100 according to the present embodiment, each resin film layer constituting each film, and specific examples of embodiments of protective covers are described in more detail.
  • the sheet material 200 includes a first film 1 and a second film 2
  • the first film 1 includes, in order from the outside of the container, a non-colored resin film layer 11c (for example, an LDPE layer), a colored A resin film layer 11a (for example, a colored LLDPE layer), a gas barrier layer 11b (for example, an EVOH layer), and a colored resin film layer 11a (for example, a colored LLDPE layer) are laminated and bonded together.
  • the form is exemplified as one of the preferred embodiments.
  • the sheet material 200 does not include the third film 3, and at least part of the peripheral edge portions of the second film 2 are joined to form a bag to form the storage area 61.
  • the sheet material 200 can be made very thin, and further, the gas barrier layers 11b and 21b can easily maintain the rigidity even when the gas is enclosed in the filler enclosure 5. .
  • the non-colored resin film layer 11c of the first film 1 is composed of recycled resin or BioPE, the bonding performance of the film or the like is not deteriorated, and the influence on the contents is reduced while recyclability and environmental characteristics are improved. can be further enhanced.
  • the difference in refractive index between the resin film layers in the first film 1 and the second film 2 is 0.2 or more, the light shielding property against the contained object is very high. Furthermore, when gas is enclosed in the filler enclosing part 5 to form a gas layer, the light shielding property against the contained object is further enhanced.
  • the sheet material 200 includes a first film 1, a second film 2, and a third film 3, and the first film 1 is a non-colored resin film layer 11c ( MDPE layer), a colored resin film layer 11a (e.g., colored LLDPE layer), a gas barrier layer 11b (e.g., EVOH layer), and a colored resin film layer 11a (e.g., colored LLDPE layer) are laminated and bonded together,
  • a colored resin film layer 21a e.g., colored LLDPE layer
  • a gas barrier layer 21b e.g., EVOH layer
  • a colored resin film layer 21a e.g., colored LLDPE layer
  • the third film 3 is a single-layer resin film of a colored resin film layer 31a (for example, a colored LLDPE layer) or a non-colored resin film layer 31c (for example, an LLDPE layer).
  • a colored resin film layer 31a for example, a colored LLDPE layer
  • a non-colored resin film layer 31c for example, an LLDPE layer
  • the gas barrier layers 11b and 21b make it easy to maintain the rigidity even when the gas is enclosed in the filler enclosure 5
  • the first film 1 and the second film Since the difference in refractive index between each resin film layer in 2 is the same, the light shielding property against the contained object is also very high.
  • the non-colored resin film layer 11c of the first film 1 is made of recycled resin or BioPE, the bonding performance of the film or the like is not lowered, and the effect on the contents is reduced while recyclability and environmental friendliness are improved. You can improve the characteristics. Furthermore, when the third film 3 is a single-layer resin film of the colored resin film layer 31a, the light-shielding property against the stored object is further enhanced.
  • the sheet material 200 includes a first film 1, a second film 2, and a third film 3, and the first film 1 is a non-colored resin film layer 11c ( HDPE layer), colored resin film layer 11a (e.g., colored LLDPE layer), gas barrier layer 11b (e.g., EVOH layer), and colored resin film layer 11a (e.g., colored LLDPE layer) are laminated and bonded resin films,
  • a colored resin film layer 21a e.g., colored LLDPE layer
  • a gas barrier layer 21b e.g., EVOH layer
  • a colored resin film layer 21a e.g., colored LLDPE layer
  • the third film 3 is a colored resin film layer 31a (e.g., colored LLDPE layer), a non-colored resin film layer 31c (e.g., LLDPE layer), or a gas barrier layer 31b (e.g., EVOH layer) in order from the outside of the container, and
  • a colored resin film layer 31a e.g., colored LLDPE layer
  • a non-colored resin film layer 31c e.g., LLDPE layer
  • a gas barrier layer 31b e.g., EVOH layer
  • the gas barrier layers 11b and 21b can easily maintain the rigidity even when the gas is enclosed in the filler enclosure 5, and the first film 1, the second film 2, and the third film 3, the difference in refractive index between the respective resin film layers is also the same, so the light shielding property against the contained object is also very high. Furthermore, when both the non-colored resin film layer 11c of the first film 1 and the non-colored resin film layer 31c of the third film 3 are made of a polyamide-based resin, the strength of the sheet material 200 is further increased. In addition, when the third film 3 includes the gas barrier layer 31b, it is easy to suppress leakage of aroma components, moisture (water vapor), and the like of the stored material from the storage area 61 .
  • the sheet material 200 includes a first film 1, a second film 2, and a third film 3, and the first film 1 is a non-colored resin film layer 11c ( LLDPE layer), colored resin film layer 11a (e.g., colored recycled LLDPE layer), gas barrier layer 11b (e.g., EVOH layer), colored resin film layer 11a (e.g., colored recycled LLDPE layer), and non-colored resin film layer 11c (e.g., LLDPE layer) are laminated and joined, and the second film 2 includes, in order from the outside of the container, a non-colored resin film layer 21c (e.g., LLDPE layer), a colored resin film layer 21a (e.g., colored recycled LLDPE layer), A gas barrier layer 21b (e.g., EVOH layer), a colored resin film layer 21a (e.g., colored recycled LLDPE layer), and a non-colored resin film layer 21c (e.g., LLDPE layer) are laminated and a non-colored resin film layer 11
  • non-colored resin film layer 31c e.g. LLDPE layer
  • a colored resin film layer 31a e.g. colored recycled LLDPE layer
  • a gas barrier layer 31b e.g. EVOH layer
  • a colored resin film layer 31a e.g. colored recycled LLDPE layer
  • a non-colored resin film layer 31c for example, LLDPE layer
  • the gas barrier layers 11b and 21b can easily maintain the rigidity even when the gas is enclosed in the filler enclosure 5.
  • this embodiment can be said to be an extremely excellent embodiment in terms of light shielding properties, since there are a great many layers that can reflect light incident from the outside of the container, including the filler enclosing part 5 . Furthermore, since none of the colored resin film layers 11a, 21a, and 31a are exposed to the housing area 61 or the joint surface with other films, these can easily be used as colored recycled resin film layers, which will be described later. It becomes easier to build a recycling system.
  • the sheet material 200 includes a first film 1, a second film 2, and a third film 3, and the first film 1 is a non-colored resin film layer 11c ( HDPE layer), gas barrier coating layer 11d (e.g. gas barrier deposition layer), non-colored resin film layer 11c (e.g. LLDPE layer), colored resin film layer 11a (e.g. colored recycled LLDPE layer), and non-colored resin film layer 11c (e.g. LLDPE layer) are laminated and bonded together, and the second film 2 includes, in order from the outside of the container, a non-colored resin film layer 21c (for example, an LLDPE layer) and a colored resin film layer 21a (for example, a colored recycled LLDPE layer).
  • a non-colored resin film layer 21c for example, an LLDPE layer
  • a colored resin film layer 21a for example, a colored recycled LLDPE layer
  • a non-colored resin film layer 21c for example, an LLDPE layer
  • a gas barrier coating layer 21d for example, a gas barrier deposition layer
  • a non-colored resin film layer 21c for example, an HDPE layer
  • the film 3 is a single-layer resin film of a non-colored resin film layer 31c (for example, an LLDPE layer) is also exemplified as one of preferred embodiments.
  • the gas barrier coating layers 11d and 21d can easily maintain the rigidity even when gas is enclosed in the filler enclosing portion 5, and each resin in the first film 1 and the second film 2 can be easily maintained.
  • the sheet material 200 can be made thinner. 5, the colored resin film layers 11a and 21a are not exposed to the housing area 61 or the joint surface with other films, so they can be colored and recycled. Easy to make a resin film layer.
  • the sheet material 200 includes the first film 1, the second film 2, and the third film 3 as shown in FIG.
  • a non-colored resin film layer 11c having a structure (three-layer structure) in which three non-colored resin film layers are laminated to each other (for example, a BOPE layer, an LDPE layer corresponding to an adhesive layer of a coextrusion laminate, and a three-layer structure in which LLDPE layers are laminated in order), colored resin film layer 11a (e.g., colored recycled LLDPE layer), gas barrier layer 11b (e.g., EVOH layer), colored resin film layer 11a (e.g., colored recycled LLDPE layer), and non-colored It is a coextruded laminated resin film in which resin film layers 11c (for example, LLDPE layers) are laminated and joined, and the second film 2 is composed of a non-colored resin film layer 21c (for example, an LLDPE layer) and a colored resin film in order from the outside of the container.
  • the third film 3 is a single-layer resin film of a non-colored resin film layer 31c (for example, an LLDPE layer).
  • the resin film is composed of a colored resin film layer 301 (for example, a milky white PET layer) and a light-shielding printed layer 302 or printed layer 303 in this order is also exemplified as one of preferred embodiments.
  • the protective cover 300 since various printings can be applied to the protective cover 300, it is easy to adopt an embodiment in which the sheet material 200 is not printed (an embodiment with higher recyclability). Also, due to the layered structure of the protective cover 300 and the sheet material 200, the light shielding property against the stored object is very high. This embodiment can also be said to be an extremely excellent embodiment in terms of light shielding properties, since there are a large number of layers that can reflect light incident from the outside of the container, including the filler encapsulating portion 5 and the air layer 306 .
  • the surface layer (the layer closest to the outside of the container) of the first film 1 is a resin made of biaxially oriented polyethylene (BOPE) obtained by biaxially stretching HDPE, MDPE, LDPE, LLDPE, or the like.
  • BOPE biaxially oriented polyethylene
  • Examples of the method for manufacturing the sheet material container 100 according to the present embodiment and the sheet material 200 constituting the sheet material container 100 include the methods described above, but more specifically, An embodiment including the following steps is exemplified as a preferred method.
  • the first film 1 and the second film 2 as described above are laminated to each other, and partially joined (for example, heat-sealed) to form a film joint 6 and a filler encapsulation.
  • a sheet material 200 having portions 5 is produced.
  • the sheet material 200 may be produced by mutually laminating the third film 3 and the like that constitute the inner container 120 .
  • the peripheral edge of the inner container 120 may be arranged slightly inside the peripheral edge of the sheet material 200 .
  • the lamination of the plurality of resin films may be a structure laminated by heat seal bonding, and may be bonded with a bonding agent (for example, a modified polyolefin bonding agent), dry lamination bonding, or coextrusion lamination.
  • a bonding agent for example, a modified polyolefin bonding agent
  • the sheet material 200 as a whole may be a dry-laminated laminated resin film or a co-extruded laminated resin film.
  • a laminated resin film in which these joints are used together may be used.
  • the sheet material 200 is a laminated resin film bonded by heat sealing, a laminated resin film bonded by a modified polyolefin bonding agent, or a coextruded laminated resin.
  • a film is more preferred.
  • the heat sealing conditions for heat sealing bonding may be the same as those described above.
  • the above coextrusion lamination bonding may also be performed in the same manner as described above.
  • the above-mentioned dry laminate bonding can be performed by a conventional method, such as a method in which an anchor coating agent (for example, a urethane-based AC agent) is coated on one or more surfaces of the resin film, dried, and then bonded. It's fine.
  • an anchor coating agent for example, a urethane-based AC agent
  • the sheet material 200 is cut and folded so that the second film 2 is closer to the inside of the container than the first film 1, and if necessary, the bottom gusset portion 103 and the top gusset portion 104 are provided. At least part of the inner side of the sheet material 200 is joined together to form a bag, and unnecessary portions are cut as necessary, thereby forming a containing area 61 for containing the contents inside the second film 2 . Between the first film 1 and the second film 2, a film joint portion 6 where the first film 1 and the second film 2 are joined is partially unjoined and a filler can be enclosed. The sheet material container 100 having the filler enclosing part 5 is produced.
  • a spout 81 or the like may be attached to the opening 70, or a skirt portion 108 may be formed at the bottom end.
  • the sheet material container 100 is sealed after the filler is introduced into the filler enclosure portion 5 from the filler introduction portion or the like.
  • the sheet material container 100 according to the present embodiment can be manufactured in which the filler enclosing part 5 swells in the thickness direction of the sheet material 200 more than the film joint part 6 and rigidity is imparted.
  • the container-packed product can be obtained by filling the storage area 61 (the inner container 120 or the like) with the contents from the opening 70 and sealing the opening 70 with, for example, a cap with a pump. It is also possible to fill the contained material before introducing the filler into the filler enclosure 5 .
  • the formation of the skirt portion 108 is carried out by folding the cut container-shaped sheet material 200 to form a bag, while folding the sheet material 200 forming the front surface of the container body and the sheet material forming the rear surface.
  • a front side lower skirt sheet and a rear side lower skirt sheet, which are constituted by a part of the sheet material 200, are arranged on the lower side of the side seal portion 101 where the side edge portions of the sheet material 200 are joined.
  • Side edges of the lower skirt sheet and the rear lower skirt sheet are joined together to form a front and rear seal portion, and the front and rear lower skirt sheets are connected via the front and rear seal portion. It can be done by a method of forming the skirt portion 108 .
  • any steps other than the above steps may be included as long as the effects of the present invention are not affected.
  • the sheet material container according to the present invention including the above-described embodiments does not contain any metal foil or metal-deposited film.
  • the physical properties and the like of the recycled resin to be recycled are less likely to deteriorate.
  • the entire surface of the container main body region includes the colored resin film layer, the light shielding property against the contents is high.
  • the sheet material has a high light-shielding property due to the inclusion of this colored resin film layer, it is not necessary to apply light-shielding printing, etc., and from this point, the physical properties of the recycled resin obtained when the sheet material is recycled are reduced. hard.
  • the sheet material container 100 which has used up the stored contents, does not contain any metal foil or metallized film. It can be recycled resin. A portion of the sheet material 200 can also be formed using this recycled resin.
  • this recycling method for example, first, the filler is removed from the filler enclosing portion 5 of the sheet material container 100 according to the present embodiment, in which the stored contents are used up and collected, and the container is The main body is crushed into small pieces, and the opening 70 (spout 81, etc.), the protective cover 300, etc. are separated, shredded and washed as necessary. Then, the obtained shredded material is melted, and resin pellets are formed by extrusion, pressure biasing, or the like, whereby recycled resin can be formed. Further, at this time, by adding a masterbatch containing coloring components and pigments, a colored recycled resin capable of forming a colored recycled resin film layer can be formed.
  • the sheet material container 100 is a sheet material container. Since the material 200 does not contain a metal foil or a metallized film, and the resin materials and coloring components used are configured as described above, even if this material is used as the main raw material, a high-quality recycled resin can be obtained. is characteristic.
  • the "main raw material” means that the ratio in the recycled resin forming raw material is more than 50% by mass, and this ratio may be 70% by mass or more, or 80% by mass or more. may be 90% by mass or more, 95% by mass or more, or 100% by mass.
  • At least part of the sheet material 200 forming the sheet material container 100 according to the present embodiment can be formed using the obtained recycled resin or colored recycled resin.
  • this recycled resin or colored recycled resin at least a part of the resin film layer that does not directly contact the contents of the sheet material 200 or other films (for example, in the embodiments of FIGS. 5, 6, or 8) At least part of the colored resin film layer 11a or 21a) is preferably formed.
  • the sheet material container 100 according to the present embodiment which is composed of the sheet material 200 including the film having the recycled resin film layer and the colored recycled resin film layer obtained in this manner, contains a resin containing the recycled resin.
  • the resin film layer does not come into direct contact with the film layer, even if a small amount of impurities are contained in the resin film layer, the impurities are less likely to migrate into the container. Also, since other films do not come into direct contact with the resin film layer using this recycled resin, the bonding performance between the films is less likely to deteriorate. It should be noted that at least part of the members such as the protective cover 300 described above and at least part of a sheet material container other than the sheet material container 100 according to the present embodiment can be formed using the recycled resin.
  • a sheet material container recycling system (horizontal recycling method) is constructed, in which the sheet material container 100 after all the contained objects are used up is recycled into a resin raw material that can be used to manufacture the sheet material container. can do.
  • the embodiment of this recycling method may include arbitrary steps other than the above steps as long as the effects of the present invention are not affected. Further, the sheet material container 100 according to the present embodiment obtained by this recycling method may also include any configuration (additional member, etc.) within a range that does not affect the effects of the present invention.
  • a sheet material container composed of a sheet material containing no metal foil or metal-deposited film, in which a plurality of resin films are laminated,
  • the sheet material includes a first film and a second film,
  • the sheet material is folded so that the first film is arranged outside the second film in the sheet material container, and at least part of the peripheral edge portions are joined to each other to form a bag,
  • a storage area for storing a storage object is formed inside the second film, Between the first film and the second film, a film joint portion where the first film and the second film are joined and the first film and the second film are not joined.
  • the first film or the second film is colored with a coloring component and has a refractive index of 1.8 or more, preferably 1.9 or more, more preferably 1.9 or more, at least over the entire surface of the container body region surrounding the storage region.
  • At least part of the colored resin film layer included in the entire surface of the container main body region is arranged on the inner surface side of the container when the first film is divided into two equal parts at the center of the film thickness, and
  • the sheet material container according to ⁇ 2> which is arranged on the outer surface side of the container when the 2 film is divided into two equal parts at the center of the film thickness.
  • the first film or the second film preferably the first film and the second film are laminated and joined by a plurality of resin film layers
  • the colored resin film layer contained in the first film and/or the second film in which a plurality of the resin film layers are laminated and bonded is preferably formed over the entire surface of the container main body region so that the adjacent resin film layers are Any one of ⁇ 1> to ⁇ 3>, which is laminated and bonded such that the difference in refractive index from the film layer is 0.2 or more, preferably 0.3 or more, more preferably 0.4 or more.
  • the layer thickness of the colored resin film layer contained in the first film and/or the second film is a resin other than the colored resin film layer contained in the first film and/or the second film
  • the first film and/or the second film is a co-extruded laminated resin film including the colored resin film layer, and the colored resin film layer is made of a polyolefin resin ⁇ 1>
  • the coextruded laminated resin film has a structure of three or more layers including two or more of the colored resin film layers, and each of the two or more colored resin film layers is made of a polyolefin resin.
  • the sheet material container according to ⁇ 6> which is laminated and joined so as to sandwich a non-colored polyolefin resin film layer, which is a non-colored resin film layer.
  • the polyolefin resin constituting the colored resin film layer and the non-colored polyolefin resin film layer is a polyethylene resin, preferably a polyethylene resin or an ethylene vinyl alcohol copolymer, ⁇ 1> to ⁇ 7>
  • ⁇ 9> The sheet material container according to any one of ⁇ 1> to ⁇ 8>, wherein the filler enclosed in the filler enclosing portion is gas.
  • the gas is air.
  • both the first film and the second film include a gas barrier layer which is a resin film layer having a gas barrier function or a gas barrier coating layer coated with a material having a gas barrier function.
  • the sheet material container according to . ⁇ 12> The sheet material container according to ⁇ 11>, wherein the gas barrier layer is composed of an ethylene-vinyl alcohol copolymer.
  • the sheet material further includes a third film disposed inside the second film, and the accommodation area is formed inside the third film,
  • the colored resin film layer is a milky white or gray colored resin film layer.
  • the colored resin film layer is a colored resin film layer colored milky white or gray using titanium oxide or carbon black as the coloring component.
  • the colored resin film layer is a colored recycled resin film layer formed by coloring a recycled resin recycled from a resin material with the coloring component;
  • the colored recycled resin film layer is a colored recycled resin film layer made of a colored recycled resin colored by adding a masterbatch containing the pigment as the coloring component to the recycled resin ⁇ 16>
  • the sheet material container according to . ⁇ 18> The sheet material container according to ⁇ 17>, wherein the pigment is one or more selected from the group consisting of a green pigment, a gray pigment, and a milky white pigment.
  • the resin film including the colored recycled resin film layer is a laminated resin film in which the colored recycled resin film layer is sandwiched between virgin resin film layers made of a virgin resin and bonded together.
  • ⁇ 20> The sheet material container according to any one of ⁇ 1> to ⁇ 19>, wherein the plurality of resin films included in the sheet material are all made of a polyolefin resin.
  • the polyolefin resin is a polyethylene resin, preferably a polyethylene resin or an ethylene vinyl alcohol copolymer.
  • ⁇ 22> The sheet material container according to any one of ⁇ 1> to ⁇ 21>, wherein the sheet material is not printed.
  • ⁇ 23> The sheet material container according to any one of ⁇ 1> to ⁇ 22>, further comprising a protective cover made of a resin film and covering at least part of the outer surface of the container body region. sheet material container.
  • ⁇ 24> The sheet material container according to ⁇ 23>, wherein the protective cover includes the colored resin film layer or a light-shielding printed layer having a light-shielding function.
  • a container-packed product comprising: the sheet material container according to any one of ⁇ 1> to ⁇ 24>; and an object accommodated in the accommodation area of the sheet material container.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Packages (AREA)
PCT/JP2021/043429 2021-11-26 2021-11-26 シート材容器 Ceased WO2023095293A1 (ja)

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PCT/JP2021/043429 WO2023095293A1 (ja) 2021-11-26 2021-11-26 シート材容器
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JP2004001888A (ja) * 2002-04-19 2004-01-08 Ishida Co Ltd 食品包装用袋
JP4643877B2 (ja) * 1999-09-10 2011-03-02 株式会社イシダ 食品包装用袋、食品を包む方法、及び積層フィルムの食品を包装するための袋としての使用
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JP2016528120A (ja) * 2013-08-01 2016-09-15 ザ プロクター アンド ギャンブル カンパニー 改善された継目を有する可撓性容器及びその作製方法
JP2017202853A (ja) * 2016-05-12 2017-11-16 北海製罐株式会社 ポリエステル樹脂製多重ボトル及びその製造方法
JP2018052120A (ja) * 2017-11-01 2018-04-05 大日本印刷株式会社 シーラントフィルム、並びにそれを用いた包装材及び包装袋
JP2020049718A (ja) * 2018-09-26 2020-04-02 藤森工業株式会社 積層シート及びパウチ容器
JP2020203716A (ja) * 2019-06-19 2020-12-24 大日本印刷株式会社 電子レンジ用包装袋
WO2021049385A1 (ja) * 2019-09-09 2021-03-18 株式会社フジシールインターナショナル シート材容器

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07119094B2 (ja) * 1988-01-18 1995-12-20 富士写真フイルム株式会社 包装材料
JPH1128783A (ja) * 1997-07-09 1999-02-02 Mitsui Chem Inc 選択光線透過性を有するガスバリアフィルム
JP4643877B2 (ja) * 1999-09-10 2011-03-02 株式会社イシダ 食品包装用袋、食品を包む方法、及び積層フィルムの食品を包装するための袋としての使用
JP2001260264A (ja) * 2000-01-11 2001-09-25 Oji Paper Co Ltd ガスバリアー性積層体
JP2003170536A (ja) * 2001-12-06 2003-06-17 Toppan Printing Co Ltd 包装材料およびそれを用いた包装容器
JP2004001888A (ja) * 2002-04-19 2004-01-08 Ishida Co Ltd 食品包装用袋
JP2016528120A (ja) * 2013-08-01 2016-09-15 ザ プロクター アンド ギャンブル カンパニー 改善された継目を有する可撓性容器及びその作製方法
WO2015146673A1 (ja) * 2014-03-26 2015-10-01 コニカミノルタ株式会社 太陽光耐久性高透明フィルム、太陽光制御フィルム、赤外線反射フィルム及びフィルムミラー
JP2017202853A (ja) * 2016-05-12 2017-11-16 北海製罐株式会社 ポリエステル樹脂製多重ボトル及びその製造方法
JP2018052120A (ja) * 2017-11-01 2018-04-05 大日本印刷株式会社 シーラントフィルム、並びにそれを用いた包装材及び包装袋
JP2020049718A (ja) * 2018-09-26 2020-04-02 藤森工業株式会社 積層シート及びパウチ容器
JP2020203716A (ja) * 2019-06-19 2020-12-24 大日本印刷株式会社 電子レンジ用包装袋
WO2021049385A1 (ja) * 2019-09-09 2021-03-18 株式会社フジシールインターナショナル シート材容器

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