JP3810038B2 - Photosensitive material packaging material and photographic photosensitive material - Google Patents
Photosensitive material packaging material and photographic photosensitive material Download PDFInfo
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- JP3810038B2 JP3810038B2 JP36650797A JP36650797A JP3810038B2 JP 3810038 B2 JP3810038 B2 JP 3810038B2 JP 36650797 A JP36650797 A JP 36650797A JP 36650797 A JP36650797 A JP 36650797A JP 3810038 B2 JP3810038 B2 JP 3810038B2
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- photographic
- film
- aluminum foil
- packaging material
- packaging
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- 239000000463 material Substances 0.000 title claims description 62
- 239000005022 packaging material Substances 0.000 title claims description 42
- 229910052782 aluminium Inorganic materials 0.000 claims description 50
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 49
- 239000011888 foil Substances 0.000 claims description 43
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 20
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 239000011247 coating layer Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 description 17
- 238000000137 annealing Methods 0.000 description 16
- -1 fatty acid esters Chemical class 0.000 description 13
- 230000008569 process Effects 0.000 description 10
- 238000003860 storage Methods 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 229920000573 polyethylene Polymers 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 7
- 239000010410 layer Substances 0.000 description 6
- 235000010724 Wisteria floribunda Nutrition 0.000 description 5
- 230000002411 adverse Effects 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 238000004806 packaging method and process Methods 0.000 description 5
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 4
- 239000006229 carbon black Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- OTRAYOBSWCVTIN-UHFFFAOYSA-N OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N Chemical compound OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N OTRAYOBSWCVTIN-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001739 density measurement Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 231100000989 no adverse effect Toxicity 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 101000855453 Vespa orientalis Histamine-releasing peptide 2 Proteins 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010731 rolling oil Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 229920000298 Cellophane Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000005069 Extreme pressure additive Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000005001 laminate film Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Landscapes
- Packages (AREA)
- Laminated Bodies (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、写真感光材料用包装材料および写真感光材料に関し、特に、遮光性や防湿性に優れ、かつ写真感光材料の写真特性に負の影響を与えることの無い写真感光材料用包装材料と、その包装材料により包装された写真感光材料に関するものである。
【0002】
【従来の技術】
一般に、撮影用写真フィルムや印画紙などの写真感光材料は、それらの保存中に目的外の露光を受けないように遮光性が高い包装材料で包装されている。その包装材料はまた、写真感光材料が大気中の水分と接触することを極力防止するために、透湿性の低い材料から形成するのが一般的である。特に、カラーネガフィルム、カラーポジフィルムなどの撮影用カラー写真フィルムなどのカラー写真感光材料は、非常に多種類の発色性化合物や補助化合物を含んでおり、それらの大部分が水分との接触により特性変化を起こしやすいことから、包装材料の選定には高度の注意が払われている。
【0003】
一方、包装材料は当然、保存中や輸送中の被包装材料の物理的損傷を防ぐ役目もしているところから、このため、包装材料自体の物理的強度も重要な問題である。さらに、包装材料は、その外装面に印刷などの装飾を施すことにより、商品のイメージを高めるための機能も要求されている。
【0004】
写真フィルムや印画紙などの写真感光材料の包装材料についても、従来より様々な研究が行なわれきたが、近年では、両面が樹脂被覆層で被覆されているか、あるいは一方の表面が樹脂被覆層で被覆され、他方の表面が紙などの材料で被覆されている焼鈍アルミニウム箔からなる写真感光材料用包装材料が多用されている。すなわち、焼鈍アルミニウム箔は、その高い遮光性や水分不透過性に加え、化学的な安定性が高く、他の化学物質に悪影響を与えにくい上に、かつ柔軟で加工が容易なことから、写真感光材料の包装に適していると認められている。ただし、機械的特性が不充分なことから、その両側表面に樹脂皮膜(ラミネートもしくは塗膜)を施している。この樹脂皮膜は、同時に装飾性の向上などのためにも利用される。
【0005】
焼鈍アルミニウム箔は、アルミニウムシートを圧延処理してアルミニウム箔としたのち、これを焼鈍する(焼き鈍す)ことによって製造される。この焼鈍処理は、アルミニウム箔を軟化させるため、そしてアルミニウムシートの圧延処理において用いられた圧延油(鉱油に、脂肪酸、脂肪酸エステルなどの極圧添加剤を加えたもの)を蒸発除去及び/又は分解除去するために行なわれる処理であり、製造される焼鈍アルミニウム箔の目的に応じて、通常は、300〜550℃で1時間以上の加熱処理が施される。アルミニウム箔の表面は、この焼鈍処理において酸化され、その加熱処理温度と処理時間に依存して、厚さが30〜250オングストローム(3.0〜25mμ)の酸化アルミニウムの皮膜が焼鈍アルミニウム箔の表面に形成される(「ラミネート加工便覧」(加工技術研究会、昭和53年9月発行)、292〜299頁に記載の「アルミニウム箔」を参照)。
【0006】
前述のように、写真感光材料用包装材料について様々な検討が加えられてきている。その例を次に挙げる。
【0007】
特開昭62−141546号公報には、元素周期率の水素原子以外のI族もしくはII族の原子、またはB、Al、Pb、Cr、Mn、Co、あるいはNiの酸化物、水酸化物、塩化物、炭酸塩、もしくは炭酸水素塩を包装材料中に混入させた写真感光材料が記載されており、これらの化合物は、写真感光材料や包装材料に添加して用いられるカーボンブラックによる悪影響を低減させる旨の記載がある。
【0008】
特開平5−88813号公報には、元素周期率の水素原子以外のI族もしくはII族の原子、またはAl、Mn、Co、あるいはNiと有機酸とからなる化合物を包装材料中に混入させた写真感光材料が記載されており、これらの化合物は、写真感光材料や包装材料に添加して用いられるカーボンブラックによる悪影響を低減させる旨の記載がある。
【0009】
特開平5−281665号公報には、耐熱性フレキシブルシート層と添加剤含有ポリオレフィン樹脂フィルム層との間に金属層を有する包装材料であって、その縦と横との引裂き強度差が1.5倍以上の写真感光材料用包装材料が記載されている。
【0010】
【発明が解決しようとする課題】
上記のように、写真感光材料の包装材料として、少なくとも一方の表面が樹脂被覆層で被覆された酸化アルミニウム皮膜を有する焼鈍アルミニウム箔からなる写真感光材料用包装材料が一般的に用いられている。ところが、近年の写真感光材料の感度などの各種の写真特性の改良に伴い、多様な化学物質が写真感光材料に添加使用されるようになったことに起因すると思われるが、樹脂で被覆された焼鈍アルミニウム箔を包装材料として用いても、その包装状態で長期間保存した場合において、感度の低下などの写真特性の低下が発生することが多くなっている。
【0011】
アルミニウム金属は、遮光性と水分透過防止性能が高い上に加工性が優れ、かつ写真感光材料に悪影響を与えることの無い金属材料として知られているので、このような現象が発生する原因は不明であった。
【0012】
【課題を解決するための手段】
本発明は、少なくとも一方の表面が樹脂被覆層で被覆された酸化アルミニウム皮膜を有する厚みが5〜200μmの焼鈍アルミニウム箔からなる写真感光材料用包装材料であって、その包装材料としての使用に際して内側面となる側の焼鈍アルミニウム箔の表面の酸化アルミニウム皮膜の厚さが2.5mμ以上、4.7mμ以下であることを特徴とする写真感光材料用包装材料にある。
本発明はまた、少なくとも一方の表面が樹脂被覆層で被覆された酸化アルミニウム皮膜を有する焼鈍アルミニウム箔からなる写真感光材料用包装材料であって、焼鈍アルミニウム箔の静電容量が150μF/40cm2 以上であることを特徴とする写真感光材料用包装材料にもある。
【0013】
本発明の写真感光材料用包装材料は、カラー画像形成用写真感光材料あるいは黒/白画像形成用写真刊行材料、特に現像試薬貯蔵部が付設されているカラー画像もしくは黒/白画像形成用写真感光材料の包装に好適に用いられる。なお、本発明に於ける包装材料は、袋状のものや箱状のもの以外に、写真感光材料に接合されて遮光作用をもたらす遮光紙の形態にあってもよい。
【0014】
【発明の実施の形態】
本発明の写真感光材料用包装材料は、少なくとも一方の表面が樹脂被覆層で被覆された酸化アルミニウム皮膜を持つ焼鈍アルミニウム箔からなる従来一般的に用いられている写真感光材料用包装材料の焼鈍アルミニウム箔部分に関する改良に係るものである。従って、本発明の特徴的要件である焼鈍アルミニウム箔部分以外の構成については、従来より一般的に利用されている構成を利用することができる。そのような少なくとも一方の表面が樹脂被覆層で被覆された焼鈍アルミニウム箔からなる一般的な写真感光材料用包装材料、そしてその構成については、例えば、特公平5−48174号公報、特開平5−281665号公報、特開昭55−140835号公報に記載が有り、本発明の写真感光材料用包装材料の製造に際しても、それらの記述を参照することができる。
【0015】
本発明の写真感光材料用包装材料の代表的な構成としては、中央に焼鈍アルミニウム箔(厚み:5〜200μm、好ましくは5〜50μm)を配置し、その一方の側にOPP(延伸ポリプロピレン)フィルム、あるいはPET(ポリエチレンテレフタレート)のような高強度で寸法安定性に優れた柔軟性の高い樹脂フィルムあるいは紙層を配置し、他方の側にポリエチレンもしくはエチレン/酢酸ビニル樹脂からなる無延伸オレフィン系樹脂フィルム、あるいはCPP(無延伸ポリプロピレン)フィルムを配置し、それらを接着剤を介し結合させた積層体の構成を挙げることができる。このような積層体は通常、幅が500mm〜1500mm、そして長さが300〜4000mのロールとして製造され、その後、スリットと部分接着されて包装袋とされる。
【0016】
本発明者の研究によって、少なくとも一方の表面(両面もしくは片面)が樹脂被覆層で被覆された焼鈍アルミニウム箔からなる写真感光材料用包装材料において、その焼鈍アルミニウム箔の表面に形成されている酸化アルミニウム層の厚さ、および静電容量、そして焼鈍処理条件が、写真感光材料に与える影響に大きく関与することが判明した。すなわち、焼鈍アルミニウム箔は、圧延アルミニウムフィルムを通常300℃以上の温度で空気中で数時間(100時間以内)かけて加熱する工程(焼鈍工程)により製造されるが、その焼鈍工程において、アルミニウムフィルムの表面に酸化アルミニウム皮膜が形成される。その酸化アルミニウム皮膜の厚さは、焼鈍条件によって左右されるが、前述のように、通常は3.0〜25.0mμ(30〜250オングストローム)となる。
【0017】
本発明者の研究によると、その焼鈍アルミニウム箔の表面に形成される酸化アルミニウム皮膜は、写真感光材料への影響を考慮すると薄いことが望ましく、特に厚みが4.7mμ以下(特に4.4mμ以下で、かつ2.5mμ以上)である場合には、問題となる写真感光材料への悪影響は殆ど発生しないことが確かめられた。なお、本発明における酸化アルミニウム皮膜の厚みはESCA法によって測定した値である。
【0018】
また、表面に酸化アルミニウム皮膜を持つ焼鈍アルミニウム箔の静電容量は、写真感光材料への影響を考慮すると、その値が大きいことが望ましく、特に静電容量が150μF/40cm2 以上(特に155μF/40cm2 以上で220μF/40cm2 以下)である場合には、問題となる写真感光材料への悪影響は殆ど発生しないことが確かめられた。このような、厚みが薄く、静電容量が大きい酸化アルミニウム皮膜を持つ焼鈍アルミニウムの製造には、比較的低温で焼鈍工程を行なうことが好ましい。すなわち焼鈍工程は、例えば280℃以下(特に250℃以下で、150℃以上)の加熱温度で行なうことが望ましい。ただし、加熱温度が低いと、圧延油などの除去を要する成分が残存しやすくなるため、焼鈍工程は、コイル状態で行なう場合には、大気中にて長時間(20時間以上、特に50時間以上)の行なうことが望ましい。あるいは、特開平3−138339号公報に記載されている二段階の焼鈍処理を利用し、その焼鈍条件(加熱条件)を、210〜230℃で15〜50時間の加熱、続いて240〜280℃で15〜50時間の加熱といった二段階での焼鈍処理を行なってもよい。
【0019】
【実施例】
[実施例1]
圧延処理したアルミニウム箔(1N30材、厚み7μm)を175mm×280mmの寸法に裁断し、平状に重ねてオーブンで第1表に記載の条件で焼鈍処理を行なった。得られた焼鈍アルミニウム箔の表面に生成した酸化アルミニウム皮膜の厚みと静電容量を測定した。その結果を併せて、第1表に示す。
【0020】
上記の焼鈍アルミニウム箔の上に富士インスタントフィルムFI−800GT(富士写真フィルム株式会社製)を置き、それを焼鈍アルミニウム箔で包み、この包みを、さらに写真性の良好な(すなわち、感光材料に悪影響を与えない)遮光性平袋(125mm×200mm、材料:紙/ポリエチレンフィルム/カーボンブラック充填ポリエチレンフィルムの積層シート)で密閉包装した。この密閉包装体を50℃、3日間の条件で保存した。保存期間終了後、そのインスタントフィルムを暗室にて取り出し、23℃で標準の濃度測定用の露光展開処理を行なって写真濃度を調べた。その結果を第1表に示す。
【0021】
【表1】
【0022】
注:(1)酸化アルミニウム皮膜の厚みはESCA法で測定した。
(2)静電容量は焼鈍アルミニウム箔についての測定値であって、3%五ホウ酸アンモニウム水溶液に浸漬して、ブリッジ法によって測定した。
(3)写真濃度レベルの評価結果は下記の基準で表した[B(青色)、G(緑色)、R(赤色)の濃度のうちのB(青色)の濃度を測定]。
【0023】
【表2】
AA:ブランク(保存処理前のフィルムの写真フィルム)の写真濃度レベルと同等
BB:ブランクよりDmax 0.1〜0.3低下
CC:ブランクより約Dmax 0.5低下
DD:ブランクより約Dmax 0.5低下、Dmin 0.5上昇
【0024】
[実施例2]
コイル状に巻いた圧延アルミニウム箔(1N30材、厚み7μm、製品幅845mm、長さ8000m)を四本用意した。これらの圧延アルミニウム箔をそれぞれ下記の焼鈍処理に付した。
【0025】
試料番号8:大気中、温度210℃、80時間
試料番号9:大気中、温度230℃、80時間
試料番号10:大気中、温度280℃、50時間
試料番号11:大気中、温度330℃、38時間
【0026】
上記の各々の焼鈍処理アルミニウム箔を用いて、セロファン(20μm)/ポリエチレンフィルム(15μm)/焼鈍アルミニウム箔(7μm)/ポリエチレンフィルム(50μm)の層構成のラミネートフィルムをタンデムラミネータで作成した。これを275mm幅にスリット加工し、横ピロー包装機にかけ、感光材料(富士写真フィルム株式会社製の富士インスタントフィルムFI−800GTフィルムのパック)を包装加工し、密閉して包装試料を得た。
【0027】
この密閉包装試料を50℃、3日間の条件で保存した。保存期間終了後、そのインスタントフィルムを暗室で取り出し、23℃の室温での標準濃度測定用の露光展開処理を行なって写真濃度を調べた。その結果を第2表に示す。
【0028】
【表3】
【0029】
注:(1)酸化アルミニウム皮膜の厚みはESCA法で測定した。
(2)静電容量は焼鈍アルミニウム箔についての測定値であって、3%五ホウ酸アンモニウム水溶液に浸漬して、ブリッジ法によって測定した。
(3)写真濃度レベルの評価結果は第1表と同じ基準で表した。
【0030】
[実施例3]
コイル状に巻いた圧延アルミニウム箔(1N30材、厚み7μm、製品幅845mm、長さ8000m)を四本用意した。これらの圧延アルミニウム箔をそれぞれ下記の焼鈍処理に付した。
【0031】
試料番号12:大気中、温度190℃、84時間
試料番号13:大気中、温度225℃、84時間
試料番号14:大気中、温度245℃、84時間
試料番号15:大気中、温度305℃、48時間
【0032】
上記の各々の焼鈍処理アルミニウム箔を100mm×300mmに切断し、これを用いて、別に用意した35mm×120mmの感光材料[カラーネガフィルム(フジカラーSuper G ACE 400)及びマイクロフィルム(ミニコピーフィルムHR II)]を包み、この包みを、さらに写真性の良好な遮光性平袋(125mm×200mm、材料:紙/ポリエチレンフィルム/カーボンブラック充填ポリエチレンフィルムの積層シート)で密閉包装した。この密閉包装体を50℃、3日間の条件で保存した。保存期間終了後、そのインスタントフィルムを暗室で取り出し、23℃の室温での標準濃度測定用の露光展開処理を行なって写真濃度を調べた。その結果を第3表に示す。
【0033】
【表4】
【0034】
注:(1)酸化アルミニウム皮膜の厚みはESCA法で測定した。
(2)静電容量は焼鈍アルミニウム箔についての測定値であって、3%五ホウ酸アンモニウム水溶液に浸漬して、ブリッジ法によって測定した。
(3)写真濃度レベルの評価結果は下記の基準で表した[B(青色)、G(緑色)、R(赤色)の濃度のうちのB(青色)の濃度を測定]。
【0035】
【表5】
[ACE 400]
AA:ブランク(保存処理前のフィルムの写真フィルム)の写真濃度レベルと同等
BB:ブランクより感度が0.03〜0.05低下する
CC:ブランクより感度が0.07〜0.10低下する
[HR II]
AAA:ブランク(保存処理前のフィルムの写真フィルム)の写真濃度レベルと同等
BBB:ブランクより感度が0.03〜0.05高くなる
CCC:ブランクより感度が0.07〜0.10高くなる
【0036】
【発明の効果】
本発明の写真感光材料用包装材料は、高い遮光性と水分透過防止性能、そして優れた加工性を保持しながら、感度などの諸写真特性が高い写真感光材料を包装した状態で長期間保存しても、その内部の写真感光材料の写真特性の劣化などの悪影響を与えることが無い。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a photographic light-sensitive material packaging material and a photographic light-sensitive material, and in particular, a photographic light-sensitive material packaging material that is excellent in light-shielding properties and moisture resistance and does not negatively affect the photographic characteristics of the photographic light-sensitive material, The present invention relates to a photographic light-sensitive material packaged with the packaging material.
[0002]
[Prior art]
In general, photographic light-sensitive materials such as photographic film and photographic paper are packaged with a highly light-shielding packaging material so as not to receive unintended exposure during storage. The packaging material is also generally formed from a material having low moisture permeability in order to prevent the photographic light-sensitive material from coming into contact with moisture in the atmosphere as much as possible. In particular, color photographic light-sensitive materials such as color negative film and color positive film such as color positive film contain a very wide variety of color-forming compounds and auxiliary compounds, most of which change their properties due to contact with moisture. Because of this, a high degree of attention is paid to the selection of packaging materials.
[0003]
On the other hand, since the packaging material naturally serves to prevent physical damage to the packaging material during storage and transportation, the physical strength of the packaging material itself is also an important issue. Furthermore, the packaging material is also required to have a function for enhancing the image of the product by applying decoration such as printing on the exterior surface.
[0004]
Various studies have also been made on packaging materials for photographic photosensitive materials such as photographic film and photographic paper. In recent years, both surfaces are coated with a resin coating layer, or one surface is coated with a resin coating layer. A packaging material for a photographic material made of an annealed aluminum foil, which is coated and the other surface is coated with a material such as paper, is often used. In other words, annealed aluminum foil has high light-shielding properties and moisture impermeability, has high chemical stability, does not adversely affect other chemical substances, and is flexible and easy to process. It is recognized as suitable for packaging photosensitive materials. However, since the mechanical properties are insufficient, a resin film (laminate or paint film) is applied to both side surfaces. This resin film is also used for improving decorativeness at the same time.
[0005]
An annealed aluminum foil is manufactured by rolling an aluminum sheet into an aluminum foil and then annealing (annealing) the aluminum sheet. This annealing process softens the aluminum foil and evaporates and / or decomposes the rolling oil (mineral oil plus extreme pressure additives such as fatty acids and fatty acid esters) used in the aluminum sheet rolling process. It is a process performed for removing, and usually a heat treatment at 300 to 550 ° C. for 1 hour or longer is performed according to the purpose of the manufactured annealed aluminum foil. The surface of the aluminum foil is oxidized in this annealing treatment, and depending on the heat treatment temperature and treatment time, an aluminum oxide film having a thickness of 30 to 250 angstroms (3.0 to 25 mμ) is formed on the surface of the annealed aluminum foil. (Refer to “Aluminum foil” described on pages 292 to 299 of “Laminating Handbook” (issued in September 1978)).
[0006]
As described above, various studies have been made on packaging materials for photographic photosensitive materials. The following are examples.
[0007]
Japanese Patent Application Laid-Open No. 62-141546 discloses a group I or group II atom other than a hydrogen atom having an element periodicity, or an oxide, hydroxide, B, Al, Pb, Cr, Mn, Co, or Ni, Photosensitive materials in which chlorides, carbonates or bicarbonates are mixed in packaging materials are described, and these compounds reduce the adverse effects of carbon black used by adding to photographic photosensitive materials and packaging materials. There is a statement to the effect.
[0008]
In JP-A-5-88813, a group I or II group atom other than a hydrogen atom having an element periodicity, or a compound composed of Al, Mn, Co, or Ni and an organic acid is mixed in the packaging material. Photosensitive materials are described, and it is described that these compounds reduce the adverse effects of carbon black used by adding to photographic photosensitive materials and packaging materials.
[0009]
JP-A-5-281665 discloses a packaging material having a metal layer between a heat-resistant flexible sheet layer and an additive-containing polyolefin resin film layer, and the difference in tear strength between the length and width is 1.5. A packaging material for photographic photosensitive material more than doubled is described.
[0010]
[Problems to be solved by the invention]
As described above, a photographic photosensitive material packaging material composed of an annealed aluminum foil having an aluminum oxide film having at least one surface coated with a resin coating layer is generally used as a photographic photosensitive material packaging material. However, with the recent improvement in various photographic characteristics such as the sensitivity of photographic photosensitive materials, various chemical substances are considered to be added to photographic photosensitive materials. Even when an annealed aluminum foil is used as a packaging material, photographic characteristics such as a reduction in sensitivity often occur when stored in the packaging state for a long time.
[0011]
Aluminum metal is known as a metal material that has high light-shielding properties and moisture permeation-preventing performance, has excellent processability, and does not adversely affect photographic photosensitive materials, so the cause of this phenomenon is unknown Met.
[0012]
[Means for Solving the Problems]
The present invention relates to a packaging material for a photographic photosensitive material comprising an annealed aluminum foil having a thickness of 5 to 200 μm and having an aluminum oxide film coated on at least one surface with a resin coating layer. The packaging material for photographic photosensitive materials is characterized in that the thickness of the aluminum oxide film on the surface of the annealed aluminum foil on the side surface is 2.5 mμ or more and 4.7 mμ or less.
The present invention is also a photographic photosensitive material packaging material comprising an annealed aluminum foil having an aluminum oxide film coated on at least one surface with a resin coating layer, and the capacitance of the annealed aluminum foil is 150 μF / 40 cm 2 or more. There is also a packaging material for a photographic light-sensitive material characterized by the above.
[0013]
The packaging material for photographic light-sensitive materials of the present invention is a photographic light-sensitive material for color image formation or a photographic publication material for black / white image formation, particularly a color image or black / white image formation photographic light-sensitive material provided with a developing reagent reservoir. It is suitably used for packaging materials. The packaging material in the present invention may be in the form of light-shielding paper that is bonded to the photographic light-sensitive material and provides a light-shielding action, in addition to the bag-like and box-like materials.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The packaging material for photographic photosensitive material of the present invention is an annealed aluminum of a packaging material for photographic photosensitive material that has been generally used, which is made of an annealed aluminum foil having an aluminum oxide film coated on at least one surface with a resin coating layer. This relates to an improvement related to the foil portion. Therefore, the structure generally used conventionally can be utilized about structures other than the annealing aluminum foil part which are the characteristic requirements of this invention. For example, Japanese Patent Publication No. 5-48174, Japanese Patent Application Laid-Open No. Hei 5- (1990) discloses a general packaging material for a photographic photosensitive material comprising an annealed aluminum foil having at least one surface coated with a resin coating layer. No. 281665 and JP-A-55-140835, and the description thereof can be referred to in the production of the photographic photosensitive material packaging material of the present invention.
[0015]
As a typical structure of the packaging material for photographic photosensitive materials of the present invention, an annealed aluminum foil (thickness: 5 to 200 μm, preferably 5 to 50 μm) is arranged at the center, and an OPP (stretched polypropylene) film is provided on one side thereof. Or an unstretched olefin resin such as PET (polyethylene terephthalate), which has a high-strength and highly flexible resin film or paper layer with excellent dimensional stability and is made of polyethylene or ethylene / vinyl acetate resin on the other side The structure of the laminated body which has arrange | positioned the film or the CPP (unstretched polypropylene) film, and couple | bonded them through the adhesive agent can be mentioned. Such a laminate is usually manufactured as a roll having a width of 500 mm to 1500 mm and a length of 300 to 4000 m, and then partially bonded to a slit to form a packaging bag.
[0016]
Aluminum oxide formed on the surface of the annealed aluminum foil in the packaging material for photographic photosensitive material comprising an annealed aluminum foil coated with a resin coating layer on at least one surface (both sides or one side) by the research of the present inventors It has been found that the thickness of the layer, the capacitance, and the annealing treatment conditions are greatly involved in the influence on the photographic light-sensitive material. That is, an annealed aluminum foil is manufactured by a process (annealing process) of heating a rolled aluminum film in air at a temperature of usually 300 ° C. or higher for several hours (within 100 hours). An aluminum oxide film is formed on the surface. The thickness of the aluminum oxide film depends on the annealing conditions, but as described above, it is usually 3.0 to 25.0 mμ (30 to 250 Å).
[0017]
According to the research of the present inventor, the aluminum oxide film formed on the surface of the annealed aluminum foil is desirably thin considering the influence on the photographic light-sensitive material, and particularly has a thickness of 4.7 mμ or less (particularly 4.4 mμ or less). And 2.5 mμ or more), it was confirmed that there was almost no adverse effect on the photographic light-sensitive material in question. In addition, the thickness of the aluminum oxide film in the present invention is a value measured by the ESCA method.
[0018]
Further, the capacitance of the annealed aluminum foil having an aluminum oxide film on the surface is preferably large in consideration of the influence on the photographic photosensitive material, and particularly the capacitance is 150 μF / 40 cm 2 or more (especially 155 μF / In the case of 40 cm 2 or more and 220 μF / 40 cm 2 or less), it was confirmed that there was almost no adverse effect on the photographic light-sensitive material in question. In order to manufacture such annealed aluminum having an aluminum oxide film having a small thickness and a large capacitance, it is preferable to perform the annealing process at a relatively low temperature. That is, it is desirable to perform the annealing process at a heating temperature of, for example, 280 ° C. or lower (particularly 250 ° C. or lower, 150 ° C. or higher). However, if the heating temperature is low, components such as rolling oil that need to be removed tend to remain. Therefore, when the annealing process is performed in a coiled state, it is performed in the atmosphere for a long time (20 hours or more, particularly 50 hours or more). ) Is desirable. Alternatively, using the two-stage annealing process described in JP-A-3-138339, the annealing condition (heating condition) is 210 to 230 ° C. for 15 to 50 hours followed by 240 to 280 ° C. The annealing process in two steps, such as heating for 15 to 50 hours, may be performed.
[0019]
【Example】
[Example 1]
The rolled aluminum foil (1N30 material, thickness 7 μm) was cut into a size of 175 mm × 280 mm, and was flattened and annealed under the conditions described in Table 1 in an oven. The thickness and capacitance of the aluminum oxide film formed on the surface of the obtained annealed aluminum foil were measured. The results are also shown in Table 1.
[0020]
Place Fuji Instant Film FI-800GT (manufactured by Fuji Photo Film Co., Ltd.) on the above-mentioned annealed aluminum foil, wrap it in annealed aluminum foil, and further improve the photographic properties (that is, adversely affect the photosensitive material). And sealed with a light-shielding flat bag (125 mm × 200 mm, material: laminated sheet of paper / polyethylene film / carbon black-filled polyethylene film). This sealed package was stored at 50 ° C. for 3 days. After the storage period, the instant film was taken out in a dark room and subjected to exposure development processing for standard density measurement at 23 ° C. to examine the photographic density. The results are shown in Table 1.
[0021]
[Table 1]
[0022]
Note: (1) The thickness of the aluminum oxide film was measured by the ESCA method.
(2) Capacitance is a measured value for the annealed aluminum foil, and was measured by the bridge method after being immersed in a 3% ammonium pentaborate aqueous solution.
(3) The evaluation result of the photographic density level is expressed by the following criteria [B (blue) density of B (blue), G (green), R (red) density is measured)].
[0023]
[Table 2]
AA: equivalent to the photographic density level of the blank (photographic film of the film before storage processing) BB: D max 0.1 to 0.3 lower than the blank CC: about D max 0.5 lower than the blank DD: about D from the blank max 0.5 decrease, D min 0.5 increase
[Example 2]
Four rolled aluminum foils (1N30 material, thickness 7 μm, product width 845 mm, length 8000 m) wound in a coil shape were prepared. Each of these rolled aluminum foils was subjected to the following annealing treatment.
[0025]
Sample number 8: In air, temperature 210 ° C., 80 hours Sample number 9: In air, temperature 230 ° C., 80 hours Sample number 10: In air, temperature 280 ° C., 50 hours Sample number 11: In air, temperature 330 ° C. 38 hours 【0026】
Using each of the above annealed aluminum foils, a laminate film having a layer structure of cellophane (20 μm) / polyethylene film (15 μm) / annealed aluminum foil (7 μm) / polyethylene film (50 μm) was prepared with a tandem laminator. This was slit into a width of 275 mm, applied to a horizontal pillow packaging machine, and a photosensitive material (a pack of Fuji Instant Film FI-800GT film manufactured by Fuji Photo Film Co., Ltd.) was packaged and sealed to obtain a packaging sample.
[0027]
This sealed package sample was stored at 50 ° C. for 3 days. After the storage period, the instant film was taken out in a dark room and subjected to exposure development for standard density measurement at room temperature of 23 ° C. to examine the photographic density. The results are shown in Table 2.
[0028]
[Table 3]
[0029]
Note: (1) The thickness of the aluminum oxide film was measured by the ESCA method.
(2) Capacitance is a measured value for the annealed aluminum foil, and was measured by the bridge method after being immersed in a 3% ammonium pentaborate aqueous solution.
(3) The evaluation result of the photographic density level was expressed by the same standard as in Table 1.
[0030]
[Example 3]
Four rolled aluminum foils (1N30 material, thickness 7 μm, product width 845 mm, length 8000 m) wound in a coil shape were prepared. Each of these rolled aluminum foils was subjected to the following annealing treatment.
[0031]
Sample number 12: In the air, temperature 190 ° C., 84 hours Sample number 13: In the air, temperature 225 ° C., 84 hours Sample number 14: In the air, temperature 245 ° C., 84 hours Sample number 15: In the air, temperature 305 ° C. 48 hours [0032]
Each of the above-mentioned annealed aluminum foils was cut into 100 mm × 300 mm, and a 35 mm × 120 mm photosensitive material [color negative film (Fuji Color Super G ACE 400) and micro film (minicopy film HR II) prepared separately. ], And this package was hermetically packaged in a light-shielding flat bag (125 mm × 200 mm, material: laminated sheet of paper / polyethylene film / carbon black-filled polyethylene film) with good photographic properties. This sealed package was stored at 50 ° C. for 3 days. After the storage period, the instant film was taken out in a dark room and subjected to exposure development for standard density measurement at room temperature of 23 ° C. to examine the photographic density. The results are shown in Table 3.
[0033]
[Table 4]
[0034]
Note: (1) The thickness of the aluminum oxide film was measured by the ESCA method.
(2) Capacitance is a measured value for the annealed aluminum foil, and was measured by the bridge method after being immersed in a 3% ammonium pentaborate aqueous solution.
(3) The evaluation result of the photographic density level is expressed by the following criteria [B (blue) density of B (blue), G (green), R (red) density is measured)].
[0035]
[Table 5]
[ACE 400]
AA: equivalent to the photographic density level of the blank (photographic film before storage processing) BB: sensitivity is reduced by 0.03 to 0.05 than blank CC: sensitivity is reduced by 0.07 to 0.10 than blank [ HR II]
AAA: equivalent to the photographic density level of the blank (photographic film before storage) BBB: 0.03-0.05 higher sensitivity than blank CCC: 0.07-0.10 higher sensitivity than blank 0036
【The invention's effect】
The packaging material for photographic photosensitive materials of the present invention can be stored for a long time in a packaged state of a photographic photosensitive material having high photographic characteristics such as sensitivity while maintaining high light-shielding property, moisture permeation-preventing performance, and excellent processability. However, there is no adverse effect such as deterioration of photographic characteristics of the photographic light-sensitive material therein.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36650797A JP3810038B2 (en) | 1997-12-22 | 1997-12-22 | Photosensitive material packaging material and photographic photosensitive material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36650797A JP3810038B2 (en) | 1997-12-22 | 1997-12-22 | Photosensitive material packaging material and photographic photosensitive material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11184045A JPH11184045A (en) | 1999-07-09 |
| JP3810038B2 true JP3810038B2 (en) | 2006-08-16 |
Family
ID=18486963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36650797A Expired - Fee Related JP3810038B2 (en) | 1997-12-22 | 1997-12-22 | Photosensitive material packaging material and photographic photosensitive material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3810038B2 (en) |
-
1997
- 1997-12-22 JP JP36650797A patent/JP3810038B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11184045A (en) | 1999-07-09 |
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