JP7427863B2 - Exterior bag for oxygen absorbing film - Google Patents
Exterior bag for oxygen absorbing film Download PDFInfo
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- JP7427863B2 JP7427863B2 JP2018203891A JP2018203891A JP7427863B2 JP 7427863 B2 JP7427863 B2 JP 7427863B2 JP 2018203891 A JP2018203891 A JP 2018203891A JP 2018203891 A JP2018203891 A JP 2018203891A JP 7427863 B2 JP7427863 B2 JP 7427863B2
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- 239000001301 oxygen Substances 0.000 title claims description 47
- 229910052760 oxygen Inorganic materials 0.000 title claims description 47
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims description 46
- 239000010410 layer Substances 0.000 claims description 74
- 230000004888 barrier function Effects 0.000 claims description 33
- -1 polyethylene Polymers 0.000 claims description 9
- 239000011888 foil Substances 0.000 claims description 8
- 230000014759 maintenance of location Effects 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 239000012793 heat-sealing layer Substances 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 229920006284 nylon film Polymers 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 description 11
- 230000037303 wrinkles Effects 0.000 description 8
- 238000004804 winding Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000005022 packaging material Substances 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 229920001707 polybutylene terephthalate Polymers 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 2
- 101000576320 Homo sapiens Max-binding protein MNT Proteins 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229940123973 Oxygen scavenger Drugs 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 229920000954 Polyglycolide Polymers 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 229920006121 Polyxylylene adipamide Polymers 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 239000004633 polyglycolic acid Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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- Packages (AREA)
- Wrappers (AREA)
- Packaging Of Machine Parts And Wound Products (AREA)
Description
本発明は、酸素吸収性フィルムのロールを、減圧状態に包装するための外装袋に関するものであり、より詳細には、酸素吸収性フィルムのロールの包装後に行う真空脱気に際してクラック等の発生が有効に防止された外装袋に関する。 The present invention relates to an outer packaging bag for packaging a roll of oxygen-absorbing film in a reduced pressure state, and more specifically, the present invention relates to an outer packaging bag for packaging a roll of oxygen-absorbing film in a reduced pressure state, and more specifically, the present invention relates to an outer packaging bag for packaging a roll of oxygen-absorbing film in a reduced pressure state. This invention relates to an outer bag that is effectively prevented.
包装容器の分野において、内容物の酸化や変質、或いはカビの発生を防止するために、外部からの酸素の透過を抑制するための酸素バリア性の他、容器内の残存酸素を吸収可能な酸素吸収性を具備する包装材料が広く使用されている。
このような酸素吸収性を有する包装材料は、マトリックス樹脂中に、鉄粉等の脱酸素剤や酸化性有機成分及び遷移金属触媒を含有する樹脂組成物から成り、脱酸素剤や酸化性有機成分が酸素と反応することによって酸素を吸収する。かかる酸素吸収反応は不可逆反応であり、いったん酸素と反応してしまった包装材料は、酸素吸収能力を喪失してしまうことから、酸素吸収性包装材料においては、製造直後から酸素との接触を抑制することが要求される。
In the field of packaging containers, in order to prevent oxidation, deterioration, or mold growth of the contents, in addition to oxygen barrier properties that suppress the permeation of oxygen from the outside, oxygen that can absorb residual oxygen inside the container Packaging materials with absorbent properties are widely used.
Such oxygen-absorbing packaging materials are made of a resin composition containing an oxygen scavenger such as iron powder, an oxidizing organic component, and a transition metal catalyst in a matrix resin. absorbs oxygen by reacting with it. This oxygen absorption reaction is an irreversible reaction, and once the packaging material has reacted with oxygen, it will lose its ability to absorb oxygen. Therefore, for oxygen-absorbing packaging materials, contact with oxygen must be suppressed immediately after production. required to do so.
このような観点から、例えば下記特許文献１には、巻き芯に巻き取られたロール状の酸素吸収性フィルムを、酸素バリア性を有する外装袋に収納し、包装体内を減圧脱気することにより、酸素吸収性フィルムの酸素吸収能力の低下を抑制することが提案されている。 From this point of view, for example, Patent Document 1 below discloses that a roll-shaped oxygen-absorbing film wound around a core is housed in an outer bag having oxygen barrier properties, and the inside of the package is degassed under reduced pressure. , it has been proposed to suppress a decrease in the oxygen absorption capacity of an oxygen-absorbing film.
しかしながら、外装袋内の酸素を取り除くために減圧脱気すると、外装袋が酸素吸収性フィルムのロール外周面に圧着することから、ロールのエッジ部分や巻芯等、凹凸が形成された箇所で外装袋に応力集中しやすい。特に中空の巻き芯を使用した場合には、外装袋は巻き芯の内部に入り込むようにして引き伸ばされる。かかる状態で一定期間経過すると、エッジ部分や巻き芯の中空部分に対応する箇所にクラックが発生し、ついには穴が発生する場合があった。 However, when degassing under reduced pressure to remove the oxygen inside the outer bag, the outer bag is pressed against the outer peripheral surface of the roll of oxygen-absorbing film. Stress tends to concentrate on the bag. Particularly when a hollow core is used, the outer bag is stretched so as to fit inside the core. After a certain period of time has passed in such a state, cracks may occur in the edge portions and locations corresponding to the hollow portions of the winding core, and eventually holes may occur.
従って本発明の目的は、ロール状の酸素吸収性フィルムを収納するための外装袋において、酸素吸収性フィルムの酸素吸収性能の低下を有効に抑制し得ると共に、外装袋内が減圧状態で一定期間経過した場合でも、クラックや穴あきの発生が有効に防止された酸素吸収性フィルム用外装袋を提供することである。 Therefore, an object of the present invention is to provide an outer bag for storing a rolled oxygen-absorbing film, which can effectively suppress the deterioration of the oxygen absorption performance of the oxygen-absorbing film, and which maintains the inside of the outer bag under reduced pressure for a certain period of time. To provide an outer packaging bag for an oxygen-absorbing film that effectively prevents the occurrence of cracks and holes even after aging.
本発明によれば、巻芯に巻き取られた酸素吸収性フィルムのロールを、減圧状態で収納するための外装袋において、
前記外装袋は、内層側から順にヒートシール層／強度保持層／酸素バリア層／強度保持層を備えた積層フィルムから成り、
前記ヒートシール層がポリエチレンから成り、前記強度保持層がナイロンの二軸延伸フィルムから成り、前記酸素バリア層がアルミニウム箔から成り、
前記強度保持層の厚みが９～３８μｍの範囲にあり、且つ引張弾性率が９８０～４０００ＭＰａの範囲にあり、
前記ヒートシール層の厚みが３０～１５０μｍの範囲にあり、前記酸素バリア層の厚みが６～２０μｍの範囲にあり、前記外装袋のトータル厚みが５０～２００ｍの範囲にあり、
前記積層フィルムの引張強度が、８０～１２０Ｎ／１５ｍｍであり、前記減圧状態における外装袋内の真空度は、ゲージ圧で－５～－１００ｋＰａの範囲であり、
前記外装袋は、前記酸素吸収性フィルムロールの体積に対して１．２～８．０倍の容積を有することを特徴とする外装袋が提供される。
According to the present invention, in an exterior bag for storing a roll of oxygen-absorbing film wound around a core under reduced pressure,
The outer bag is made of a laminated film including a heat seal layer/strength retention layer/oxygen barrier layer/strength retention layer in order from the inner layer side,
The heat-sealing layer is made of polyethylene, the strength-retaining layer is made of a biaxially stretched nylon film, and the oxygen barrier layer is made of aluminum foil,
The thickness of the strength-retaining layer is in the range of 9 to 38 μm, and the tensile modulus is in the range of 980 to 4000 MPa,
The thickness of the heat seal layer is in the range of 30 to 150 μm, the thickness of the oxygen barrier layer is in the range of 6 to 20 μm, and the total thickness of the outer bag is in the range of 50 to 200 m,
The tensile strength of the laminated film is 80 to 120 N/15 mm , and the degree of vacuum in the outer bag in the reduced pressure state is in the range of -5 to -100 kPa in gauge pressure,
The outer bag is characterized in that the outer bag has a volume that is 1.2 to 8.0 times the volume of the oxygen-absorbing film roll .
本発明の酸素吸収性フィルム用外装袋においては、減圧状態で一定期間保管された場合でも、クラックや穴あきの発生が有効に防止される。特に中空の巻き芯を使用し、巻き芯の内部に外装袋が入り込んだ状態になってもクラックや穴あきが発生せず、外装袋内の減圧状態が維持され、酸素吸収性フィルムの酸素吸収性能を長期にわたって維持することが可能になる。 In the outer bag for an oxygen-absorbing film of the present invention, even when stored for a certain period of time under reduced pressure, the occurrence of cracks and holes is effectively prevented. In particular, by using a hollow core, even if the outer bag is inserted inside the core, no cracks or holes will occur, the reduced pressure inside the outer bag is maintained, and the oxygen-absorbing film absorbs oxygen. It becomes possible to maintain performance over a long period of time.
（外装袋）
本発明の酸素吸収性フィルム用外装袋は、巻き芯に巻き取られたロール状の酸素吸収性フィルムの酸素吸収性能を維持するために、減圧状態で酸素吸収性フィルムのロールを収納するため包装袋であり、酸素バリア層及び強度保持層を備え、且つ強度保持層が酸素バリア層よりも内側に位置することにより、減圧状態での外装袋のクラックや穴あき等の発生を防止することができ、外装袋内の減圧状態を長期にわたって維持し、酸素吸収性フィルムの酸素吸収性能を維持することが可能になる。
(Outer bag)
The outer bag for oxygen-absorbing film of the present invention is a package for storing a roll of oxygen-absorbing film under reduced pressure in order to maintain the oxygen-absorbing performance of the roll-shaped oxygen-absorbing film wound around a winding core. The bag is equipped with an oxygen barrier layer and a strength-retaining layer, and the strength-retaining layer is located inside the oxygen barrier layer to prevent cracks and holes from occurring in the outer bag under reduced pressure. This makes it possible to maintain a reduced pressure state within the outer bag over a long period of time, and maintain the oxygen absorption performance of the oxygen-absorbing film.
［酸素バリア層］
酸素バリア層は、外装袋内への外気の侵入を阻止し得るものであり、包装容器の分野で使用されている従来公知の酸素バリア層を使用することができ、これに限定されないが、アルミニウムやスチール等の金属箔、酸化ケイ素，酸化アルミニウム，酸化ジルコニウム、シリカとアルミナの混合体，ダイヤモンドライクカーボン、アルミニウム等の蒸着層を形成した蒸着フィルム、エチレンビニルアルコール共重合体、ＭＸＤ６等のポリアミド、ポリビニルアルコール、ポリグリコール酸、ポリカルボン酸系ガスバリア性組成物等から成る有機系バリアフィルム、アルミナ，シリカ等の無機物とエチレンビニルアルコール共重合体、ＭＸＤ６等のポリアミド、ポリビニルアルコール、ポリグリコール酸、ポリカルボン酸等の有機物系材料を組み合わせた有機－無機ハイブリットバリアフィルム等を例示することができる。
尚、酸素バリア層として蒸着フィルムを用いる場合、蒸着フィルムの基材フィルムは、ポリエチレンテレフタレート（ＰＥＴ）、ポリブチレンテレフタレート（ＰＢＴ）等のポリエステル、ポリエチレン、ポリプロピレン等のポリオレフィン、ナイロン等のポリアミド樹脂から成る延伸又は未延伸フィルムを使用することができ、後述する強度保持層を構成する延伸フィルムに蒸着膜を形成することもできる。
[Oxygen barrier layer]
The oxygen barrier layer can prevent outside air from entering into the outer bag, and conventionally known oxygen barrier layers used in the field of packaging containers can be used, including but not limited to aluminum. metal foils such as steel, silicon oxide, aluminum oxide, zirconium oxide, mixtures of silica and alumina, diamond-like carbon, vapor-deposited films with vapor-deposited layers of aluminum, etc., ethylene-vinyl alcohol copolymers, polyamides such as MXD6, Organic barrier films made of polyvinyl alcohol, polyglycolic acid, polycarboxylic acid-based gas barrier compositions, ethylene-vinyl alcohol copolymers with inorganic materials such as alumina and silica, polyamides such as MXD6, polyvinyl alcohol, polyglycolic acid, polyester, etc. Examples include organic-inorganic hybrid barrier films in which organic materials such as carboxylic acids are combined.
In addition, when using a vapor-deposited film as an oxygen barrier layer, the base film of the vapor-deposited film is made of polyester such as polyethylene terephthalate (PET) or polybutylene terephthalate (PBT), polyolefin such as polyethylene or polypropylene, or polyamide resin such as nylon. A stretched or unstretched film can be used, and a vapor deposited film can also be formed on the stretched film constituting the strength-retaining layer described below.
本発明の外装袋においては、強度保持層を備えることから、特に減圧状態でクラックが生じやすい金属を用いた場合でも、クラックの発生が抑制できる。したがって、アルミニウム箔等の金属箔を、酸素バリア層として好適に使用することができ、優れた酸素バリア性を発現できる。
本発明において酸素バリア層の厚みは、アルミニウム箔を使用する場合には６～２０μｍの範囲、特に６～９μｍの範囲にあることが望ましい。
Since the outer bag of the present invention is provided with a strength-retaining layer, the occurrence of cracks can be suppressed even when a metal that tends to crack particularly under reduced pressure is used. Therefore, metal foil such as aluminum foil can be suitably used as an oxygen barrier layer, and can exhibit excellent oxygen barrier properties.
In the present invention, when aluminum foil is used, the thickness of the oxygen barrier layer is preferably in the range of 6 to 20 μm, particularly in the range of 6 to 9 μm.
［強度保持層］
本発明の外装袋においては、強度保持層は外装袋の強度を向上し、減圧状態で、応力集中が生じた場合でも、クラックや穴あきの発生を有効に抑制するものである。
このような作用効果を発現可能な強度保持層としては、厚みが９～３８μｍ、特に１２～１５μｍの範囲にあり、フィルムのＭＤ方向及びＴＤ方向の両方向の引張弾性率（ＪＩＳ Ｋ７１２７準拠）が９００～５０００ＭＰａ、特に９８０～４０００ＭＰａの範囲にある延伸フィルムを好適に使用できる。強度保持層の厚みや引張弾性率が、上記範囲よりも小さい場合には、外装袋に十分な強度を付与することができない。また強度保持層の厚みや引張弾性率が上記範囲よりも大きい場合には、経済性に劣るだけでなく、減圧する際に、効率よく圧縮されず、減圧状態に圧縮された際に生じるシワが大きくなり、酸素吸収性フィルムのロールにシワを転写するおそれがある。
好適な強度保持層としては、ナイロン、ＰＥＴやＰＢＴ等のポリエステル、ポリプロピレン等から成るフィルムを二軸延伸した二軸延伸フィルムを例示できる。
[Strength retention layer]
In the outer bag of the present invention, the strength-retaining layer improves the strength of the outer bag and effectively suppresses the occurrence of cracks and holes even when stress concentration occurs in a reduced pressure state.
A strength-retaining layer that can exhibit such effects has a thickness in the range of 9 to 38 μm, particularly 12 to 15 μm, and has a tensile modulus of elasticity of 900 in both the MD and TD directions (according to JIS K7127). Stretched films in the range of ~5000 MPa, particularly 980 ~ 4000 MPa can be suitably used. When the thickness and tensile modulus of the strength-retaining layer are smaller than the above ranges, sufficient strength cannot be imparted to the outer bag. In addition, if the thickness or tensile modulus of the strength-retaining layer is larger than the above range, not only will it be less economical, but it will not be compressed efficiently when the pressure is reduced, and wrinkles will occur when it is compressed to a reduced pressure state. There is a risk that the wrinkles may become larger and transfer wrinkles to the roll of the oxygen-absorbing film.
A suitable strength-retaining layer may be a biaxially stretched film obtained by biaxially stretching a film made of nylon, polyester such as PET or PBT, polypropylene, or the like.
［積層構造］
本発明の外装袋においては、上述した酸素バリア層及び強度保持層を少なくとも備えて成り、特に強度保持層が酸素バリア層よりも内層側に位置することが重要である。これにより、減圧による外装袋の引き込みの影響を直接酸素バリア層に与えることが低減され、アルミニウム箔等の金属箔を酸素バリア層として用いた場合でもクラックの発生を有効に抑制できる。
また強度保持層は、酸素バリア層よりも内層側に設けるだけでなく、外層側にも設けることもでき、これにより、外部から衝撃を受けた場合にも酸素バリア層にクラックが発生することを有効に防止することができる。外層に強度保持層を形成しない場合には、酸素バリア層の種類にもよるが、酸素バリア層上に、ポリオレフィン等から成る耐湿性樹脂層を形成してもよい。
外装袋は、最内層にヒートシール層を有することが外装袋の成形性の点から望ましく、ヒートシール層は、従来公知のポリエチレン、ポリプロピレン等のポリオレフィンから成ることができる。ヒートシール層の厚みは、３０～１５０μｍの範囲にあることが好ましく、３０～１００μｍの範囲にあることがより好ましい。上記範囲よりもヒートシール層の厚みが薄い場合には、十分なヒートシール性を得ることができず、その一方上記範囲よりもヒートシール層の厚みが厚い場合には、経済性に劣るだけでなく、外装袋が減圧により圧縮された際に生じるシワが大きくなるおそれがある。
[Laminated structure]
The outer bag of the present invention includes at least the above-mentioned oxygen barrier layer and strength-retaining layer, and it is particularly important that the strength-retaining layer is located closer to the inner layer than the oxygen barrier layer. This reduces the direct effect of the pull-in of the outer bag due to reduced pressure on the oxygen barrier layer, and can effectively suppress the occurrence of cracks even when a metal foil such as aluminum foil is used as the oxygen barrier layer.
In addition, the strength-retaining layer can be provided not only on the inner layer side of the oxygen barrier layer, but also on the outer layer side, which prevents cracks from occurring in the oxygen barrier layer even when subjected to external impact. It can be effectively prevented. When the strength-retaining layer is not formed as the outer layer, a moisture-resistant resin layer made of polyolefin or the like may be formed on the oxygen barrier layer, depending on the type of the oxygen barrier layer.
It is desirable for the outer bag to have a heat-sealing layer as the innermost layer from the viewpoint of moldability of the outer bag, and the heat-sealing layer can be made of conventionally known polyolefins such as polyethylene and polypropylene. The thickness of the heat seal layer is preferably in the range of 30 to 150 μm, more preferably in the range of 30 to 100 μm. If the thickness of the heat-sealing layer is thinner than the above range, sufficient heat-sealing properties cannot be obtained, while on the other hand, if the thickness of the heat-sealing layer is thicker than the above range, it will simply be less economical. There is a risk that the wrinkles that occur when the outer bag is compressed by reduced pressure will become larger.
減圧により圧縮されてもクラック等の破損がなく、酸素バリア性や水分バリア性等を維持可能な外装袋としては、これに限定されないが、内層側から順にヒートシール層／強度保持層／酸素バリア層／強度保持層、ヒートシール層／強度保持層／酸素バリア層／耐湿性樹脂層、ヒートシール層／強度保持層／蒸着層／基材フィルム等の層構成を有する積層フィルムから成る外装袋を例示できる。
上記積層フィルムは、６０Ｎ／１５ｍｍ以上、特に８０～１２０Ｎ／１５ｍｍの引張強度を有することが好ましい。上記範囲よりも引張強度が小さい場合には、上記範囲にある場合に比して、クラックや穴あきの発生のおそれがあり、一方上記範囲よりも引張強度が大きいと、上記範囲にある場合に比して、減圧状態でのシワが大きくなり、酸素吸収性フィルムのロール表面にシワを転写するおそれがある。
外装袋のトータル厚みは、上述した酸素バリア層及び強度保持層を構成する樹脂等の種類によっても異なり、これに限定されないが、５０～２００μｍの範囲にあることが好ましい。
Exterior bags that do not cause damage such as cracks even when compressed by reduced pressure and maintain oxygen barrier properties, moisture barrier properties, etc. include, but are not limited to, heat-sealing layers, strength-retaining layers, and oxygen barriers in order from the inner layer side. An outer bag made of a laminated film having a layer structure such as layer/strength retention layer, heat seal layer/strength retention layer/oxygen barrier layer/moisture resistant resin layer, heat seal layer/strength retention layer/evaporation layer/base film, etc. I can give an example.
The laminated film preferably has a tensile strength of 60 N/15 mm or more, particularly 80 to 120 N/15 mm. If the tensile strength is lower than the above range, there is a risk of cracks or holes occurring compared to when it is within the above range, while on the other hand, if the tensile strength is greater than the above range, compared to when it is within the above range. As a result, wrinkles become larger under reduced pressure, and there is a risk that the wrinkles may be transferred to the roll surface of the oxygen-absorbing film.
The total thickness of the outer bag varies depending on the type of resin constituting the oxygen barrier layer and the strength-retaining layer, and is preferably in the range of 50 to 200 μm, although it is not limited thereto.
外装袋は、予めフィルムの周囲をヒートシール等で接合し、袋状にした成形されたものに限定されず、酸素吸収性フィルムのロールを外装袋を構成するフィルムで包んだ後に、該フィルムの周囲を接合して袋状とし、酸素吸収性フィルムのロールの外装袋への収納と外装袋の成形を同時に行ってもよい。
また外装袋は、減圧状態でのシワの発生を低減するという観点からは、酸素吸収性フィルムのロールの体積に対して１．２～８．０倍程度の容積を有することが好ましい。
The outer bag is not limited to a bag-shaped bag formed by bonding the periphery of a film with heat sealing etc. in advance, but after wrapping a roll of oxygen-absorbing film with the film constituting the outer bag, the film is The periphery may be joined to form a bag, and the roll of the oxygen-absorbing film may be stored in the outer bag and the outer bag may be formed at the same time.
Further, from the viewpoint of reducing the occurrence of wrinkles under reduced pressure, the outer bag preferably has a volume of about 1.2 to 8.0 times the volume of the roll of oxygen-absorbing film.
（酸素吸収性フィルム）
本発明における酸素吸収性フィルムは、酸素と反応することによって酸素を捕捉し得る機能を有する限り、制限なく対象となる。例えば、酸化性有機成分及び遷移金属触媒を含有する酸素吸収性樹脂組成物から成るフィルムや、鉄粉等の脱酸素剤を含有する樹脂フィルム等の従来公知の酸素吸収性フィルムを挙げることができる。また酸素吸収性フィルムの単層フィルムの他、酸素吸収性フィルムから成る層を含有する積層フィルムであってもよい。
また酸素吸収性フィルムをロール状に巻き取る巻芯は、従来公知の紙製、プラスチック製、金属製等の巻き芯を制限なく使用することができる。尚、中空の巻き芯を用いた場合、減圧状態で保存されると、巻き芯の中空部分にクラックや穴が発生しやすいが、本発明の外装袋は強度保持層の存在により、クラックや穴の発生が抑制されているため、中空の巻芯を用いることができる。
(Oxygen absorbing film)
The oxygen-absorbing film of the present invention is not limited as long as it has the ability to trap oxygen by reacting with oxygen. Examples include conventionally known oxygen-absorbing films such as films made of oxygen-absorbing resin compositions containing oxidizing organic components and transition metal catalysts, and resin films containing oxygen scavengers such as iron powder. . Further, in addition to a single-layer film of an oxygen-absorbing film, a laminated film containing a layer of an oxygen-absorbing film may be used.
Further, as the winding core for winding the oxygen-absorbing film into a roll, conventionally known winding cores made of paper, plastic, metal, etc. can be used without limitation. Note that when a hollow core is used, cracks and holes are likely to occur in the hollow part of the core when stored under reduced pressure. Since the occurrence of is suppressed, a hollow winding core can be used.
（酸素吸収性フィルム包装体）
本発明の外装袋は、巻芯に巻きつけられた酸素吸収性フィルムのロールを収納し、これを真空ポンプ等により外装袋内をできる限り脱気し、減圧された状態で密封された酸素吸収性フィルム包装体に使用される。
減圧状態における外装袋内の真空度は、外装袋の強度が向上していることから、ゲージ圧で－５～－１００ｋＰａの範囲にすることができる。本発明の外装袋は、後述する実施例の結果からも明らかなように、高い真空度においてもクラックや穴あきを発生することが有効に防止されている。
また、酸素吸収性フィルムのロールを外装袋で包装して成る酸素吸収性フィルム包装体においては、外装袋内を減圧することに伴い、外装袋が圧縮されてシワが発生された状態で酸素吸収性フィルムのロールに密着することから、緩衝材を介して酸素吸収性フィルムのロールを外装袋に収納することにより、酸素吸収性フィルムのロールに緩衝材のシワが転写されることを防止することもできる。
(Oxygen-absorbing film packaging)
The outer bag of the present invention stores a roll of oxygen-absorbing film wrapped around a core, and deaerates the inside of the outer bag as much as possible using a vacuum pump, etc., and then seals the oxygen-absorbing film under reduced pressure. Used for plastic film packaging.
The degree of vacuum inside the outer bag in a reduced pressure state can be in the range of -5 to -100 kPa in terms of gauge pressure because the strength of the outer bag is improved. As is clear from the results of Examples described later, the outer bag of the present invention is effectively prevented from cracking or puncturing even under a high degree of vacuum.
In addition, in an oxygen-absorbing film package made by wrapping a roll of oxygen-absorbing film in an outer bag, when the inside of the outer bag is depressurized, the outer bag is compressed and wrinkled, and oxygen is absorbed. By storing the roll of oxygen-absorbing film in an exterior bag through a cushioning material, the wrinkles of the cushioning material are prevented from being transferred to the roll of oxygen-absorbing film. You can also do it.
（実験方法）
中空の巻き芯に酸素吸収性フィルムが巻取られたロール体を、下記表１に示す積層体から成る外装袋に収納し、表２に示す真空度となるように、真空ポンプを用いて減圧し、密封した。なお、表中の真空度はゲージ圧表記で記載した。
得られた酸素吸収性フィルム包装体を、常温常圧の条件下で１１２０ｋｍ輸送後の外観（約１８日経過後）の外観を確認した。結果を表２及び図１～３に示す。
尚、強度保持層を構成するナイロンの引張弾性率はＭＤ方向１４７０ＭＰａ、ＴＤ方向９８０ＭＰａであった。
(experimental method)
A roll body in which an oxygen-absorbing film is wound around a hollow core is stored in an outer bag made of a laminate shown in Table 1 below, and the pressure is reduced using a vacuum pump to achieve the degree of vacuum shown in Table 2. and sealed. Note that the degree of vacuum in the table is expressed in gauge pressure.
The appearance of the obtained oxygen-absorbing film package after being transported 1120 km under normal temperature and normal pressure conditions (after about 18 days) was confirmed. The results are shown in Table 2 and Figures 1 to 3.
The tensile modulus of the nylon constituting the strength-retaining layer was 1470 MPa in the MD direction and 980 MPa in the TD direction.
Claims (1)
前記外装袋は、内層側から順にヒートシール層／強度保持層／酸素バリア層／強度保持層を備えた積層フィルムから成り、
前記ヒートシール層がポリエチレンから成り、前記強度保持層がナイロンの二軸延伸フィルムから成り、前記酸素バリア層がアルミニウム箔から成り、
前記強度保持層の厚みが９～３８μｍの範囲にあり、且つ引張弾性率が９８０～４０００ＭＰａの範囲にあり、
前記ヒートシール層の厚みが３０～１５０μｍの範囲にあり、前記酸素バリア層の厚みが６～２０μｍの範囲にあり、前記外装袋のトータル厚みが５０～２００μｍの範囲にあり、
前記積層フィルムの引張強度が、８０～１２０Ｎ／１５ｍｍであり、前記減圧状態における外装袋内の真空度は、ゲージ圧で－５～－１００ｋＰａの範囲であり、
前記外装袋は、前記酸素吸収性フィルムのロールの体積に対して１．２～８．０倍の容積を有することを特徴とする外装袋。 In an outer bag for storing a roll of oxygen-absorbing film wound around a core under reduced pressure,
The outer bag is made of a laminated film including a heat seal layer/strength retention layer/oxygen barrier layer/strength retention layer in order from the inner layer side,
The heat-sealing layer is made of polyethylene, the strength-retaining layer is made of a biaxially stretched nylon film, and the oxygen barrier layer is made of aluminum foil,
The thickness of the strength-retaining layer is in the range of 9 to 38 μm, and the tensile modulus is in the range of 980 to 4000 MPa,
The thickness of the heat seal layer is in the range of 30 to 150 μm, the thickness of the oxygen barrier layer is in the range of 6 to 20 μm, and the total thickness of the outer bag is in the range of 50 to 200 μm ,
The tensile strength of the laminated film is 80 to 120 N/15 mm, and the degree of vacuum in the outer bag in the reduced pressure state is in the range of -5 to -100 kPa in gauge pressure,
The outer bag is characterized in that the outer bag has a volume that is 1.2 to 8.0 times the volume of the roll of the oxygen-absorbing film.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002308343A (en) | 2001-04-09 | 2002-10-23 | Kuraray Co Ltd | Packaging materials and film rolls |
| JP2004175398A (en) | 2002-11-27 | 2004-06-24 | Toppan Printing Co Ltd | Packaging bag |
| JP2013103343A (en) | 2011-11-10 | 2013-05-30 | Toppan Printing Co Ltd | Covering material for vacuum heat insulating material, and vacuum heat insulating material using the same |
| JP2014079916A (en) | 2012-10-15 | 2014-05-08 | Mitsubishi Gas Chemical Co Inc | Oxygen-absorbing multi-layer body |
| JP2014221666A (en) | 2013-05-14 | 2014-11-27 | スタープラスチック工業株式会社 | Film roll package |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002308343A (en) | 2001-04-09 | 2002-10-23 | Kuraray Co Ltd | Packaging materials and film rolls |
| JP2004175398A (en) | 2002-11-27 | 2004-06-24 | Toppan Printing Co Ltd | Packaging bag |
| JP2013103343A (en) | 2011-11-10 | 2013-05-30 | Toppan Printing Co Ltd | Covering material for vacuum heat insulating material, and vacuum heat insulating material using the same |
| JP2014079916A (en) | 2012-10-15 | 2014-05-08 | Mitsubishi Gas Chemical Co Inc | Oxygen-absorbing multi-layer body |
| JP2014221666A (en) | 2013-05-14 | 2014-11-27 | スタープラスチック工業株式会社 | Film roll package |
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