JP3771857B2 - Rolled photosensitive material shading package - Google Patents

Rolled photosensitive material shading package Download PDF

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Publication number
JP3771857B2
JP3771857B2 JP2002074341A JP2002074341A JP3771857B2 JP 3771857 B2 JP3771857 B2 JP 3771857B2 JP 2002074341 A JP2002074341 A JP 2002074341A JP 2002074341 A JP2002074341 A JP 2002074341A JP 3771857 B2 JP3771857 B2 JP 3771857B2
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paper
light
roll
core
shielding
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JP2003270762A (en
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太介 中西
洋史 阿部
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Fujifilm Holdings Corp
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Fuji Photo Film Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、カラーぺーパー、カラーネガフィルム、X−レイフィルム、電算写植ペーパー等ロール状感光材料の遮光包装体に関する。
【0002】
【従来の技術】
従来、ロール状感光材料に用いられる巻芯は、密度の高いクラフト紙、再生紙等をスパイラル状に巻いて形成されており、ロール状感光材料の巻き付けの圧力や、物流課程における衝撃などによる変形を防止するために、可能な限り固く形成され、扁平圧縮強度が高くなっている。
【0003】
通常、このような巻芯を用いたロール状感光材料には、巻き始めにおける感光性フィルムの始端部に対応する領域に段差ができてしまう。すると、感光性フィルムは強固に巻芯に巻きつけられるため、その巻き圧によって段差に応力がかかり、上記段差が原因で、ロール状感光材料の巻き始めに近い部分(巻き始めから数周部分)に一定周期の型付きや、すじ状の圧力かぶり(以下「すじ状かぶり」という場合がある。)を生じてしまう。また、固い巻芯を用いると、巻芯表面のスパイラル状の溝による型付きや、圧力かぶりを生じる場合もある。
【0004】
一方、明室下で露光装置に装填できるようするために、ロール状感光材料に遮光包装を施すことがある。この場合、通常硬質の側面遮光板(以下「フランジ」と言う場合がある。)が用いられる。図4を用いて遮光包装を施した従来のロール状感光材料について説明する。図4は、従来のロール状感光材料遮光包装体を示す斜視図である。図4において、ロール状感光材料20は、巻芯21に感光性フィルム2がロール状に巻き付けられて構成されており、フランジ3の円筒状の挿入部が巻芯21に挿入されて嵌合されている。フランジ3には、輸送中などに支持体からの脱落を防止するため、円筒状の挿入部に突起状のリブ4が設けられている。さらに、ロール状感光材料20は、遮光リーダ5で覆われており、遮光リーダ5は粘着テープ6で貼り合わされている。
【0005】
上述のような構成を有するロール状感光材料には、感光性フィルムのエッジが波状に変形し、印字露光・現像処理後に像がぼやける、いわゆる「印字ぼけ」と言われる現象が生じるといった問題がある。上記印字ぼけとは、フランジのリブ(突起)によって巻芯が内から圧迫され、図5の側面図に示すように巻芯の縁端部周辺がリブの形状に沿って変形し、これに伴ってフィルムのエッジが波状に変形するために起こる現象である。
これらすじ状かぶりや印字ぼけのため、通常、巻き始めから数周分の感光性フィルムは品質上使用することができない。
【0006】
上述のような問題を解決するためには、巻芯に感光性フィルムを緩く巻きつける、いわゆる「緩巻き」をおこなえばある程度解決することができる。しかし、緩巻きをおこなうと、流通過程における振動や偏った保持状態等によって、ロール状に巻かれた感光性フィルムが円錐状に突き出す、いわゆる「たけのこ状」を呈する。また、巻取工程において巻姿不良となり易く、作業性が著しく低下するとともに包装不良が発生し易いという欠点もある。さらに、最適の巻き固さは、感光材料の厚さ、長さ及び摩擦係数、支持体の弾力性及び表面硬度、温湿度、流通手段、経時期間等により決定されるもので、適切な巻き固さを確定することは困難である。
【0007】
上述したような欠点を防止する技術として、実公平2−24116号公報には、巻取芯周面の全巾にわたり、その円周方向の全部を緩衝性及び弾力性を有する0.5g/cm3以下の低密度の紙、合成紙、5〜15倍の発泡倍率を有する樹脂発泡体のいずれかの物質で形成された巻取芯が提案されている。
【0008】
上述した樹脂発泡体等で形成した巻取芯は、紙支持体、紙支持体の両側に各種ポリエチレン樹脂を被覆した耐水性支持体等に感光層を塗布したロール状写真印画紙に使用すると、各種の型付き故障及び圧力かぶりが大幅に減少するものである。
【0009】
しかしながら、弾力性が紙支持体に比して小さいプラスチックフイルム支持体に感光層を塗布したロール状の感光性フイルムは圧力の影響を受けやすいため、上記樹脂発泡体等で形成した巻取芯を用いても、巻き始めから5〜6周目まではすじ状かぶり等の圧力かぶりや印字ぼけが発生してしまう。
【0010】
さらに、実公平2−24116号公報に開示されている不織布を設けた巻取芯の場合は、ロール状写真フイルムと不織布との摩擦抵抗が小さいので、接着テープを用いてロール状写真フイルムを不織布に固着しなければならない。
【0011】
また、発泡倍率の高い発泡ポリエチレン等特定の樹脂を主成分とする樹脂組成物を用いた架橋発泡シートを巻芯に巻き付けて圧力かぶりや印字ぼけの発生を防止することも考えられる。しかし、感光材料の使用後、巻芯を処分する際に、ポリエチレン樹脂等は不燃物であるため、環境保全やリサイクル等の廃棄性の面で問題がある。
【0012】
【発明が解決しようとする課題】
本発明が解決しようとする課題は、圧力かぶりや印字ぼけ等の不具合を防止し、使用後の廃棄性に優れるロール状感光材料遮光包装体を提供することである。
【0013】
【課題を解決するための手段】
上記の課題は、以下の手段により解決することができた。
(1)少なくとも、中空の円筒状芯部材表面に発泡樹脂を含む紙部材を有する巻芯と、前記巻芯の外周にロール状に巻き付けられたロール状感光性フィルムと、前記巻芯の中空部に嵌合する挿入部を有し、前記巻芯の両端に設けられた側面遮光板と、前記ロール状感光性フィルムの終端に接合されて前記ロール状感光性フィルムを被服する遮光性リーダーと、を備えたロール状感光材料遮光包装体であって、前記紙部材は、発泡樹脂含有率が3質量%〜20質量%、密度が0.05g/cm3〜0.3g/cm3、厚さが0.5mm〜2mmであることを特徴とするロール状感光材料遮光包装体である。
上記(1)のロール状感光材料遮光包装体(以下、「本発明の包装体」という場合がある。)によれば、縁筒状芯部材が、発泡樹脂含有率、密度および厚さが上記範囲内にある紙部材を有するため、ロール状感光材料の不具合を防止するのに最適なクッション性を巻芯に付与することができる。
【0014】
また、本発明のロール状感光材料遮光包装体は、プラスチックフィルムに記録層を設けた感光性フィルムを用いたものであっても巻圧や遮光フランジのリブなどを原因とするすじ状かぶりや印字ぼけを効果的に防止することができる。
【0015】
尚、本明細書において「〜」は、前の数値以上、後の数値以下を示す。
【0016】
【発明の実施の形態】
本発明について具体的に説明する。
本発明のロール状感光材料遮光包装体は、少なくとも、中空の円筒状芯部材表面に発泡樹脂を含む紙部材を有する巻芯と、前記巻芯の外周にロール状に巻き付けられたロール状感光性フィルム(以下、単に「感光性フィルム」という場合がある。)と、前記巻芯の中空部に嵌合する挿入部を有し、前記巻芯の両端に設けられた側面遮光板と、前記ロール状感光性フィルムの終端部に接合されて前記ロール状感光性フィルムを被服する遮光性リーダーと、を備え、前記紙部材の発泡樹脂含有率が3質量%〜20質量%、密度が0.05g/cm3〜0.3g/cm3、厚さが0.5mm〜2mmであることを特徴とする。
これにより、感光性フィルムの巻き始めの先端部によって生じる段差や、フランジのリブによる芯部材の変形による影響を紙部材のクッション性によって緩和することができる。
【0017】
本発明における巻芯について図1を用いて説明する。図1は、本発明における巻芯を用いたロール状感光材料を示す斜視図である。図1においてロール状感光材料10は、本発明における巻芯1に感光性フィルム2がロール状に巻き付けられて構成されている。さらに、巻芯1は、中空の筒状芯部材1aと、その外周面に設けたクッション性を有する紙部材1bと、で構成される。
【0018】
本発明における紙部材の奏する作用について図2および図3を用いて説明する。本発明における巻芯1において、筒状芯部材1aの外周表面に設けられた紙部材1bは、いわゆるクッション層の働きをする。感光性フィルムの段差が原因で発生するすじ状かぶりを例にとって説明する。この場合、本発明においては、感光性フィルムの巻き始めの始端部2aが図2に示すように紙部材1bに沈み込むため、感光性フィルムの始端部2aによって生じる段差がなくなる。これにより、巻圧によって段差に加わる応力が緩和され、すじ状かぶりの発生を防止することができる。
【0019】
フランジのリブによる巻芯の変形が原因で発生する印字ぼけを例にとって説明する。図3は、リブを設けたフランジを挿入したロール状感光材料を示す断面図である。本発明によると、フランジの挿入部3aに設けられた突起状のリブによって筒状芯部材1aは断面形状が波状に変形するものの、図3に示すように、筒状芯部材1aの波状の凹凸がクッション性を有する紙部材1bに沈み込む。即ち、筒状芯部材1aの変形は本発明における巻芯1の感光性フィルム2との接触面の形状に影響を与えない。これにより、感光性フィルム2に悪影響を及ぼすことがなく、印字ぼけの発生を防止することができる。
【0020】
《ロール状感光材料遮光包装体》
以下に本発明における巻芯を構成する部材を中心にロール状感光材料遮光包装体について順次説明する。
【0021】
〈巻芯〉
上述の通り本発明における巻芯は、筒状芯部材と紙部材とによって構成される。
−筒状芯部材−
上記筒状芯部材は、少なくともその両端がフランジの挿入部が嵌合するように中空であることが好ましく、全長にわたり中空であることが特に好ましい。また、上記筒状芯部材は遮光性を有することが好ましい。
上記筒状芯部材の材料としては、好ましくは板紙であり、さらに好ましくは、クラフトパルプ紙、アルカリパルプ紙などの板紙を積層することによって構成される紙である。紙の材質は特に限定されないが遊離硫黄などの含有量が少なく感光性フィルムの各特性に影響しない紙が好ましい。
【0022】
本発明における筒状芯部材の厚さは、1〜10mmが好ましく、2〜7mmがさらに好ましい。また、本発明における筒状芯部材の幅は特に限定されるものでなく、ロール状感光材料の目的に応じて適宜決定される。
本発明における筒状芯部材は、通常板紙を5〜15層程度スパイラル状に積層して厚さ約2mm〜7mmとし、必要な長さに切断して作ることができる。このように積層した巻芯は通常必要な遮光性を有しているが、さらに遮光性を高める目的で、板紙に遮光性物質を適宜添加することができる。
【0023】
−紙部材−
上記紙部材は、発泡樹脂を含有し、クッション性を有する。
上記紙部材は、パルプを中心として製造される。使用されるパルプとしては、例えば、針葉樹や広葉樹の化学パルプや機械パルプ等の木材パルプ、麻や綿等の非木材天然パルプ、ポリエチレンやプリプロピレン等を原料とした合成パルプ、古紙パルプ等を挙げることができる。これらのパルプは各々組み合わせて使用してもよい。さらに、上記パルプの他にガラス繊維、炭素繊維、アクリル繊維、レーヨン繊維、フェノール繊維、ポリアミド繊維、ポリエステル繊維等の有機繊維、アルミナ繊維等の各種繊維を混抄してもよい。
上記紙部材中のパルプの含有量としては、51質量%〜100質量%が好ましく、80質量%〜100質量%がさらに好ましい。
【0024】
本発明に使用する発泡樹脂としては、マイクロカプセル内に低沸点溶剤を封入した熱膨張性マイクロカプセルであれば特に限定なく用いることができる。使用済みの低密度発泡紙を焼却処理する際にダイオキシンを発生させるおそれがないく環境性に優れる観点からは、非塩素系化合物であるポリアクリロニトリル系、アクリロニトリル・メタクリル酸アルキル共重合体などの熱可塑性樹脂をカプセル外殻が好ましい。例えば、一般に熱膨張性マイクロカプセルと呼ばれる市販品としては、エクスパンセル053WU(以下#053とする)等があり、これはアクリロニトリル・メタクリル酸アルキル共重合体にてカプセル外殻が形成され、該外殻は95℃付近で軟化が始まる。前記カプセルには低沸点の炭化水素(イソブタン)が内包されており、外殻樹脂の軟化に伴いガス化したイソブタンの内圧により急激に体積が膨張(発泡)する。発泡樹脂粒子単体の発泡倍率は143℃付近で極大となり、それ以上の温度ではイソブタンの内圧が高くなり過ぎ、軟化したカプセルが徐々に破壊され(破泡)、発泡倍率が逆に低下してしまう。このため、破泡を起こさせず発泡倍率が極大となるような温度を発泡樹脂に付与し、発泡した状態を保持したまま冷却固定すれば、最も効率よく低密度発泡紙を得ることができる。
【0025】
上記発泡樹脂は自重の5倍程度の水に分散攪拌して使用する。該発泡樹脂分散液には分散助剤としてポリカルボン酸型高分子などのアニオン系界面活性剤を発泡樹脂の0.3〜0.8%添加し攪拌することにより凝集物の分離・分散に効果がある。上記アニオン系界面活性剤の市販品としては、ポイズ521、ポイズ530(いずれも花王(株)製)がある。これら界面活性剤は親水性であるためサイズ剤との併用においては1.0%以上添加すると紙のサイズ性(インキ等の滲み防止防止効果)が低下するので好ましくない。なお、パルプスラリーに添加する分散剤としては、前記のポリカルボン酸型高分子等のアニオン系界面活性剤以外に、非イオン性界面活性剤、陽イオン性界面活性剤及び両性界面活性剤を用いてもよい。
【0026】
上記発泡樹脂分散液を100〜150メッシュの金網等から成るストレーナーを通過させた後、または該分散液にポリカルボン酸型高分子等のアニオン系界面活性剤を分散助剤(以下、単に分散剤という)に用い、このものを発泡樹脂の固形分量に対して0.5%程度添加して撹拌した後、パルプスラリーに配合して該スラリー中に均一に分散させる。100メッシュより粗いものを通しても、発泡樹脂粒子の凝集は解消せず、発泡したときにムラができアバタ状微細突起物ができる。また150メッシュより細かいものでは発泡粒子による目詰まりを起こすため適当でない。また、目的とする製品の用途に応じてサイズ剤、紙力増強剤等の薬品や染料、顔料等の填料その他をさらに添加してもよい。
【0027】
上記発泡樹脂の発泡倍率としては、5〜100倍が好ましく、40〜80倍がさらに好ましい。
【0028】
本発明において紙部材中の発泡樹脂の含有量は、3質量%〜20質量%である。上記発泡樹脂の含有量が3質量%未満であると、紙部材のクッション性が低下、若しくは、クッション性の付与が困難となり、20質量%を越えると廃棄性が低下してしまう。上記発泡樹脂の含有量としては、5質量%〜15質量%であることが好ましい。
【0029】
本発明において上記紙部材の密度は、0.05g/cm3〜0.3g/cm3である。上記密度が0.05g/cm3未満であると、紙部材の反発力が低すぎるため紙部材のクッション性が低下し、プラステックフィルムを支持体とする感光性フィルムを巻き付けた際等に十分にすじ状かぶりや印字ぼけの発生を防止することができない。また、上記密度が0.3g/cm3を越えると、反発力が大きすぎるため、紙部材が受ける外力を十分に吸収することができず、上記と同様に本発明の効果を十分に発揮することができない。上記紙部材の密度としては、0.1g/cm3〜0.2g/cm3が好ましい。
【0030】
本発明において上記紙部材の厚みは、0.5mm〜2mmである。上記紙部材の厚みが0.5mm未満であると、フランジのリブによる巻芯表面の変形を防止できなく、2mmを越えるとロール状感光材料の製品外径の観点から使用できない印刷機器がある。上記紙部材の厚みとしては1mm〜2mmが好ましい。
【0031】
上記紙部材を上記筒状芯部材の外周面に設ける手段としては、特に限定はないが、上記紙部材をシート状に形成し、シート状の紙部材を上記筒状芯部材に巻き付ける方法が好ましい。
上記紙部材の製造方法としては、パルプに発泡樹脂を配合して抄造した紙ウェブを、加熱により発泡させて低密度の嵩高な紙を製造する方法が挙げられる。該方法においては、上記パルプ中に添加する発泡樹脂として熱膨張性マイクロカプセルを用いると共に、該カプセルをパルプスラリー中に均一に分散させ、その際、上記発泡樹脂のパルプスラリー中における発泡樹脂粒子径として、少なくとも100メッシュパス分が98%以上を占めるように分散させた後、このパルプスラリーを抄紙した上で、加熱発泡させる。
【0032】
パルプスラリーを抄造した上で、加熱発泡前の湿紙ウェブの水分量を少なくとも41〜60%の範囲に保持して加熱発泡させるのが好ましい。また、上記発泡樹脂をパルプスラリー中に均一に分散させるためには界面活性剤を併用してもよい。さらに、発泡樹脂をパルプスラリー中にパルプ質量に対して固形分で5〜20%添加した上で均一に分散させて湿紙ウェブを形成させ、かつ加熱発泡前の湿紙ウェブの水分量を41〜60%の状態とした後に、上記ウェブをドライヤーを介して加熱発泡させる。
【0033】
上記発泡樹脂として、アクリロニトリル系の熱可塑性樹脂をカプセル外殻に使用したマイクロカプセルを選定した上で、該カプセルをパルプスラリー中に分散させる際、ポリカルボン酸型高分子からなるアニオン系界面活性剤を分散剤として用い、かつ発泡性粒子の固形分量に対し0.3〜0.8%添加するのが好ましい。
【0034】
または、上記発泡樹脂であるマイクロカプセルを100〜150メッシュの篩目を有するストレーナまたはスクリーンを経由させた後、該カプセルをパルプスラリー中に添加して均一に混合し、かつ加熱発泡前の湿紙ウェブの水分量を41〜60%の状態とした後に、加熱発泡させてもよい。
【0035】
上記ドライヤーとしては、シリンダードライヤー、ヤンキードライヤー等があり、一般的にヤンキードライヤーを使用すれば、平滑な面の紙が得られるが、速度が遅く結果としてコスト上昇につながる。しかしこの事は、最終用途により任意に選択すれば良い事であり、特に限定されるものではない。ドライヤーの表面温度は、130〜155℃であれば本発明の低密度発泡紙は得られるが、この温度範囲に限定されるものではない。ドライヤー表面温度とウェブ水分の関係、ウェブとドライヤーとの接触時間が発泡の重要な要因であるため、ドライヤー表面温度を上げる際は発泡樹脂の破泡をおこさせない条件を整えれば、良好な低密度発泡紙を製造することが可能であるといえる。
【0036】
〈ロール状感光性フィルム〉
次に本発明における巻芯にロール状に巻き付けられる感光性フィルムについて説明する。上記感光性フィルムとしては、カラーぺーパー、カラーネガフィルム、X−レイフィルム、電算写植ペーパー等の長尺の感光性フィルムが挙げられる。上記感光性フィルムの支持体としては、ポリエチレンテレフタレート、ポリカーボネート、セルローストリアセテート等のプラスチックフィルム、紙、ポリエチレンラミネート紙等が用いられる。上記プラスチックフィルムは、巻芯の形状の変形による圧力等の影響を受けやすく、上述のすじ状かぶりや印字ぼけ等が発生しやすいことから、プラスチックフィルムを支持体として用いた感光性フィルムに本発明における巻芯を用いると効果的にその効果を発揮することができる。
【0037】
上記感光性フィルムの厚みとしては、90μm〜200μmであることが好ましい。厚みが90μm〜200μmの感光性フィルムを用いたロール状感光材料に本発明における巻芯を用いると、本発明の効果を十分に発揮することができる。
【0038】
また、巻き始めから2mまでの感光性フィルムの浮き量(感光性フィルムを平滑な面に置いたときの平滑面から感光性縁端部の浮き量)の最大値は1.0mm以下が好ましく、0.5mm以下がさらに好ましい。
【0039】
〈遮光性包装〉
本発明の包装体は、本発明における巻芯を用いたロール状感光材料に遮光性包装を施したものであり、少なくとも上記巻芯の両端に設けられる遮光性のフランジ(側面遮光板)と、上記ロール状感光性フィルムの終端部に接合されて上記ロール状感光性フィルムを被服する遮光性リーダーとを有する。
【0040】
(側面遮光板)
遮光性のフランジは、通常円盤状フランジ部およびその中央に設けられた円筒状挿入部からなる。円筒状挿入部を筒状芯部材内側の中空部に挿入することにより、ロール状感光材料をその側面から遮光するために有効である。
また、円筒状挿入部は、製版用スキャナーのような露光機材に装填できるように金属製の主軸を通すことができる穴を中央部に有している。レーザースキャナー等の中で前記の主軸が円筒状挿入部の内側に挿入され、感光材料を所定の位置に支持する。
円筒状挿入部の外径は挿入する筒状芯部材の内径より若干大きくしてあり、それによって遮光性フランジと筒状芯部材との間で嵌合力を得る。円筒状支持部の外径と筒状芯部材の内径との関係は嵌合力が30kg〜60kgになるように設定することが好ましい。嵌合力が20kg以下になると、感光材料包装体の輸送中の振動や落下により、遮光性フランジがずれたり抜けたりする可能性がある。
また嵌合力が70kgを超えると筒状芯部材の膨張が大きくなるのでクッション層が筒状芯部材の膨張を吸収できなくなる懸念がある。
【0041】
ISO14535には、2種類のフランジ(硬質フランジおよび柔軟性フランジ)について規定している。
上記硬質フランジは、その中に露光装置の主軸が挿入される仕様において使用される。この硬質の遮光性フランジは、耐磨耗性ポリスチレン樹脂、ハイインパクトポリスチレン樹脂、各種ポリプロピレン樹脂、ABS(アクリルニトリル/ブタジエン/スチレン共重合体)樹脂等を成形して作ることができる。また、必要な遮光性を得るため成形する前に樹脂にカーボンブラックのような遮光材料を混練させて成形する。遮光性フランジの厚さは、1mm〜5mmであることが好ましい。因みにISO14535の規格によると、フランジのリムの厚さは、3mm±0.3mmと規定されている。
【0042】
遮光性フランジの円筒状挿入部の外周には、巻芯との嵌合力を高めるために、突起すなわちリブを設けることが好ましい。リブは円盤状端部に近い円筒状挿入部の根元から円筒状挿入部の先端に向かってテーパー状に設けると、巻芯に容易に挿入することができるので好ましい。また、感光材料を使用した後は容易に引き出すこともできる。突起の数は特に制限されないが、挿入部の外周に4〜8個を等間隔に設けることが好ましい。
最も好ましい態様として、突起を持たない円筒状支持部のとき5kg〜20kg程度の嵌合力を得るように設定した上で突起を設けて最終的に30kg〜60kgの嵌合力を得るようにすることが好ましい。
【0043】
(遮光性リーダー)
上記遮光性リーダーは、ポリエチレンフィルム、OPP(延伸ポリプロピレン)フィルムなどの熱可塑性樹脂フィルムが用いられる。
遮光性リーダーには複数の熱可塑性樹脂フィルムを積層した複合フィルムを用いることができる。また、熱収縮性フィルムも用いることができる。
遮光性リーダーの遮光性はカーボンブラックなどの遮光材料を含有させることによって得られる。
【0044】
遮光性リーダーは、特開平6−175291号、同8−62783号及び実公平6−31465号の各公報に記載されているように構成される。
【0045】
ロール状感光材料に遮光包装を施す場合には、本発明における巻芯に長尺状の感光性フィルムを巻き付けた後、本発明における巻芯の両側に硬質樹脂からなる円筒状挿入部を有する遮光性フランジを挿入し、感光性フィルムの終端にこの幅より広い遮光性リーダーを接合し、次いで該感光材料の外周長の1.5倍以上を被覆すればよい。
【0046】
遮光包装を施したロール状感光材料を使用するにあたっては、感光性フィルムに後続する遮光性リーダーを取り外した後、未感光の感光性フィルムを必要なサイズに裁断して使用することができる。また、明室下で露光機材に装填して機材の中でシート状に裁断しながら自動的に記録することができる。また、露光機材の中で自動的に記録ドラムに巻き付けて記録することもできる。
【0047】
【実施例】
以下に実施例を示すが、本発明は、これらの実施例に限られるものではない。
【0048】
[実施例1]
厚さ0.5mmのクラフトパルプ原紙(KP紙、興陽製紙(株)製)を2周巻き付け、更に0.5mmのアルカリパルプ原紙(NSA原紙、王子製紙(株)製)を2周巻き付けて厚さ約2mmの紙製の筒状芯部材を作製し、更にその上に発泡樹脂含有量3質量%および下記表1に示す密度を有する紙クッション材(紙部材)を厚さが0.5mmになるように巻き付け巻芯A〜Dを得た。これらの巻芯は内径が71.15mmとなるように原紙およびクッション材をスパイラル状に連続して巻き付け、長さ635mmに切断して作製した。
【0049】
尚、紙クッション材は以下の方法で作製した。
広葉樹パルプ(LBKP)80%と針葉樹パルプ(NBKP)20%とからなる混合パルプをカナダ濾水度(CFS)で580mlに叩解したものを使用し、発泡樹脂としてエクスパンセル053WUを自重の3倍の水に攪拌し、発泡樹脂の水分散液を調整した。該発泡樹脂水分散液をJIS−z8801規格の標準篩100〜150メッシュを用いてパスさせ残渣分を2%以下にして、パルプの絶乾質量に対して9%になるように該発泡剤分散液を添加し、更に、乾燥紙力増強剤(ポリストロン194−7、荒川化学工業(株)製)を0.2%、澱粉(エースディンAP−20、大和化学(株)製)を0.8%、アルキルケテンダイマー系サイズ剤(サイズパインK287、荒川化学工業(株)製)を0.1%、湿紙紙力増強剤(WS515LX、日本PMC(株)製)を0.25%、順次添加し、手抄を行い、乾燥前湿紙ウェブの水分率を41%〜60%になるように調整した。尚、上記各薬品の添加量はすべて絶乾パルプに対する固形分の質量%であり、作製した手抄紙の目標坪量は220g/m2である。
その後、46%の水分に調整したウエブをロータリードライヤー(ジャッポー(株)製)にて表面温度135℃、145℃で乾燥し表1に示す密度を有する紙クッション材(紙部材)を得た。
【0050】
次に、カーボンブラックを混練したポリスチレン樹脂からなる遮光性フランジをISO14535の規格に適合するように作製した。遮光性フランジの寸法は、フランジ部の外径(130.80mm)、円筒状挿入部の外径(71.30mm)、円筒状挿入部の中央に設けた穴の内径(37.40mm)、フランジ部のリム厚さ(3.00mm)である。突起状のリブを円筒状支持部の根元に6個等間隔で設けた。突起の最大高さを0.35mmに設定したので円筒状挿入部の最大径は72.00mmである。
【0051】
上述の各巻芯に、幅83.8cm、厚み102μmの印刷用出力感光性フィルム(富士フイルム社製;商品名 NSL)61mを5.0kgのテンションで巻き付け、ロール状感光材料を得た。
その後遮光包装を施すため上述の遮光性フランジを巻芯の中空部に両端から挿入し、巻芯に巻き付けた感光性フィルムの最外端に遮光性リーダーを接続して感光材料の外周面を被覆した。そして、最後に遮光性リーダーの最終端をテープでとめて遮光包装を施した実施例1のロール状感光材料遮光包装体を得た。
【0052】
尚、遮光性リーダーは、ポリエチレン樹脂にカーボンブラックを含有した厚さ0.14mmのフィルムであり、感光性フィルムを被覆する部分の幅は65.7cmであり、被覆する部分の長さは感光性フィルムの外周面の長さの約1.5倍であった。
【0053】
〈評価〉
得られたロール状感光材料遮光包装体を45℃・Dryの条件下で3日保存した。
【0054】
−フィルムの両端部の浮き量−
上記保存後のロール状感光材料について、巻き始めから2mまでの感光性フイルムを水平な台に置き、両端の浮き量の最大値を測定した。結果を表1に示す。
【0055】
−印字テスト−
上記保存後のロール状感光材料について、DT―R3100(大日本スクリーン製造(株)製)を用いて搬送・露光を巻芯側の最終部までおこないその後現像して、巻き始めから2mまでの感光性フィルムについて下記の基準に従って評価した。結果を表1に示す。
〔評価〕
◎:印字ぼけが全く認められず、搬送性にも優れていた。
○:印字ぼけが若干認められるが実用上問題のない程度であった。尚、搬送性は良好であった。
×:印字ぼけが顕著に認められ、搬送性も悪く実用上問題があった。
【0056】
[実施例2〜5、比較例1〜2]
実施例1において、紙クッション材(紙部材)の発泡樹脂含有量および密度を表1に示す値に変更した以外は実施例1と同様にしてロール状感光材料遮光包装体を作製し、評価をおこなった。結果を表1に示す。
【0057】
【表1】

Figure 0003771857
【0058】
[比較例3]
実施例1において紙クッション材(紙部材)の密度を0.4g/cm3に変更し、発泡樹脂含有量を表2に示す値に変更した以外は実施例1と同様にしてロール状感光材料遮光包装体を作製し、評価をおこなった。結果を表2に示す。
【0059】
【表2】
Figure 0003771857
【0060】
表1からわかるように、本発明における巻芯を用いた実施例のロール状感光材料遮光包装体は、印字ぼけの発生も少なく、浮き量も1.0mmを越えるものはなかった。これに対し、発泡樹脂含有率が本発明の範疇にない比較例1および2の巻芯を用いたロール状感光材料遮光包装体は、印字ぼけが発生し、浮き量も1.0mmを越えるものがあった。さらに、紙クッション(紙部材)の密度が0.4g/cm3である比較例3の巻芯を用いたロール状感光材料は、印字ぼけの発生が顕著に認められ、浮き量も大きく実用上の許容範囲外であった。
【0061】
[実施例6]
厚さ0.5mmのクラフトパルプ原紙(KP紙、興陽製紙(株)製)を2周巻き付け、更に0.5mmのアルカリパルプ原紙(NSA原紙、王子製紙(株)製)を2周巻き付けて厚さ約2.0mmの紙製の筒状芯部を作製し、更にその上に発泡樹脂含有量3質量%および下記表3に示す密度を有する紙クッション材(紙部材)を厚さが1.0mmになるように巻き付け巻芯A’〜D’を得た。これらの巻芯は内径が71.15mmとなるように原紙およびクッション材をスパイラル状に連続して巻き付け、長さ635mmに切断して作製した。
尚、上記紙クッション材(紙部材)は、実施例1と同様の方法で作製した。
【0062】
上述の各巻芯に、幅83.8cm、厚み175μmの印刷用出力感光性フィルム(富士フイルム社製;商品名 HL−175)36mを5.0kgのテンションで巻き付け、ロール状感光材料を得た。
その後遮光包装を施すため上述の遮光性フランジを巻芯の中空部に両端から挿入し、巻芯に巻き付けた感光性フィルムの最外端に上述の遮光性リーダーを接続して感光材料の外周面を被覆した。そして、最後に遮光性リーダーの最終端をテープでとめて遮光包装を施した実施例6のロール状感光材料遮光包装体を得た。
【0063】
〈評価〉
−すじ状かぶり−
得られたロール状感光材料遮光包装体を45℃・Dryの条件下で3日保存後、感光性フィルムの巻き始めの始端部の段差がすじ状かぶりとなって発生した長さを測定した。結果を表3に示す。尚、すじ状かぶりが発生した長さは2.5m未満が実用上許容範囲であり、好ましくは1m未満である。
【0064】
[実施例7〜10、比較例4〜5]
実施例6において、紙クッション材(紙部材)の発泡樹脂含有量および密度を表3に示す値に変更した以外は実施例6と同様にしてロール状感光材料遮光包装体を作製し、評価をおこなった。結果を表3に示す。
【0065】
【表3】
Figure 0003771857
【0066】
[比較例6]
実施例6において紙クッション材(紙部材)の密度を0.4g/cm3に変更し、発泡樹脂含有量を表4に示す値に変更した以外は実施例6と同様にしてロール状感光材料遮光包装体を作製し、評価をおこなった。結果を表4に示す。
【0067】
【表4】
Figure 0003771857
【0068】
表3および4からわかるように、本発明における巻芯を用いた実施例のロール状感光材料遮光包装体はいずれも、すじ状かぶりの発生が認められた長さが2.5m未満であった。これに対し、発泡樹脂含有率が本発明の範疇にない比較例4および5の巻芯を用いたロール状感光材料遮光包装体は、すじ状かぶりの発生が4m以上認められ、実用上の許容範囲外であった。さらに、紙クッション材(紙部材)の密度が0.4g/cm3である比較例6の巻芯を用いたロール状感光材料遮光包装体も、すじ状かぶりの発生が顕著に認められ実用上の許容範囲外であった。
【0069】
[比較例7]
実施例6において、巻芯として紙クッションのない厚さ3mmの紙巻き芯を用いた以外は実施例6と同様にしてロール状感光材料遮光包装体を作製し、評価をおこなった。その結果、すじ状かぶりが発生した長さは13mであり、実用上の許容範囲外であった。
【0070】
【発明の効果】
本発明によれば、圧力かぶりや印字ぼけ等の不具合を防止し、使用後の廃棄性に優れるロール状感光材料遮光包装体を提供することができる。
【図面の簡単な説明】
【図1】 本発明における巻芯を用いたロール状感光材料を示す斜視図である。
【図2】 本発明における巻芯の作用を示す説明図である。
【図3】 リブを設けたフランジを挿入したロール状感光材料遮光包装体を示す断面図である。
【図4】 従来のロール状感光材料遮光包装を示す斜視図である。
【図5】 縁端部周辺がリブの形状に沿って変形した従来の巻芯を説明するための側面図である。
【符号の説明】
1 巻芯
1a 筒状芯部材
1b 紙部材
2 感光性フィルム
3 遮光性フランジ
4 リブ
5 遮光リーダ
10 ロール状感光材料[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light-shielding package of a roll-shaped photosensitive material such as a color paper, a color negative film, an X-ray film, and a computer-type transfer paper.
[0002]
[Prior art]
Conventionally, a core used for a roll-shaped photosensitive material is formed by spirally winding a high-density kraft paper, recycled paper, etc., and deformed due to the pressure of winding the roll-shaped photosensitive material or an impact in a logistics process. In order to prevent this, it is formed as hard as possible and has a high flat compressive strength.
[0003]
Usually, a roll-shaped photosensitive material using such a winding core has a step in a region corresponding to the start end portion of the photosensitive film at the beginning of winding. Then, since the photosensitive film is firmly wound around the core, the step is stressed by the winding pressure, and due to the above step, the portion close to the start of winding of the roll-shaped photosensitive material (several portions from the start of winding) A mold with a fixed period and a streaky pressure fog (hereinafter sometimes referred to as “streaky fog”) are generated. In addition, when a hard core is used, there is a case where a die is formed by a spiral groove on the surface of the core or pressure fogging occurs.
[0004]
On the other hand, in order to be able to load the exposure apparatus in a bright room, a light-shielding package may be applied to the roll-shaped photosensitive material. In this case, a hard side light shielding plate (hereinafter sometimes referred to as “flange”) is used. A conventional roll-shaped photosensitive material with light-shielding packaging will be described with reference to FIG. FIG. 4 is a perspective view showing a conventional rolled photosensitive material light shielding package. In FIG. 4, the roll-shaped photosensitive material 20 is configured by winding the photosensitive film 2 around a winding core 21, and the cylindrical insertion portion of the flange 3 is inserted into the winding core 21 and fitted. ing. The flange 3 is provided with a protruding rib 4 at a cylindrical insertion portion in order to prevent the flange 3 from dropping off from the support during transportation or the like. Further, the roll-shaped photosensitive material 20 is covered with a light-shielding reader 5, and the light-shielding reader 5 is bonded with an adhesive tape 6.
[0005]
The roll-shaped photosensitive material having the above-described configuration has a problem that the edge of the photosensitive film is deformed in a wave shape and the image is blurred after the printing exposure / development process, so-called “print blur” occurs. . The above-mentioned printing blur is caused by the core being pressed from the inside by the rib (projection) of the flange, and as shown in the side view of FIG. 5, the periphery of the edge of the core is deformed along the shape of the rib. This is a phenomenon that occurs because the edge of the film deforms in a wave shape.
Due to these streaks and printing blur, the photosensitive film for several turns from the beginning of winding cannot usually be used in terms of quality.
[0006]
In order to solve the above-mentioned problem, it can be solved to some extent by performing so-called “slow winding” by loosely winding the photosensitive film around the core. However, when loosely wound, the photosensitive film wound in a roll shape has a so-called “bamboo shoot shape” that protrudes in a conical shape due to vibration in the distribution process, a biased holding state, or the like. In addition, the winding process is liable to be defective in the winding process, and workability is remarkably lowered and packaging defects are likely to occur. Furthermore, the optimum winding hardness is determined by the thickness, length and coefficient of friction of the photosensitive material, the elasticity and surface hardness of the support, the temperature and humidity, the distribution means, the aging period, etc. It is difficult to determine the length.
[0007]
As a technique for preventing the above-described drawbacks, Japanese Utility Model Publication No. 2-24116 discloses that 0.5 g / cm of the entire circumferential direction of the entire circumference of the winding core has buffering and elasticity. Three A winding core formed of any of the following low-density paper, synthetic paper, and resin foam having a foaming ratio of 5 to 15 times has been proposed.
[0008]
When the winding core formed of the above-described resin foam is used for a roll-shaped photographic printing paper in which a photosensitive layer is applied to a paper support, a water-resistant support coated with various polyethylene resins on both sides of the paper support, Various mold failures and pressure fog are greatly reduced.
[0009]
However, a roll-shaped photosensitive film in which a photosensitive layer is coated on a plastic film support having a lower elasticity than that of a paper support is susceptible to pressure. Therefore, a winding core formed of the resin foam or the like is not used. Even if it is used, pressure fogging such as streak fogging or printing blur occurs from the beginning of winding to the sixth to sixth rounds.
[0010]
Furthermore, in the case of the winding core provided with the nonwoven fabric disclosed in Japanese Utility Model Publication No. 2-24116, since the frictional resistance between the roll-shaped photographic film and the nonwoven fabric is small, the roll-shaped photographic film is nonwoven fabric using an adhesive tape. Must stick to.
[0011]
It is also conceivable to prevent the occurrence of pressure fog and print blur by wrapping a cross-linked foamed sheet using a resin composition containing a specific resin as a main component, such as foamed polyethylene having a high expansion ratio, around the core. However, when the core is disposed after the photosensitive material is used, polyethylene resin or the like is a non-combustible material, and thus there is a problem in terms of disposal such as environmental protection and recycling.
[0012]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to provide a roll-shaped light-sensitive material light-shielding package that prevents problems such as pressure fog and printing blur and is excellent in discardability after use.
[0013]
[Means for Solving the Problems]
Said subject was able to be solved by the following means.
(1) At least a winding core having a paper member containing a foamed resin on the surface of a hollow cylindrical core member, a roll-like photosensitive film wound around the outer periphery of the winding core, and a hollow portion of the winding core A side light-shielding plate provided at both ends of the core, a light-shielding reader that is bonded to the end of the roll-shaped photosensitive film and wears the roll-shaped photosensitive film, The paper member has a foamed resin content of 3% by mass to 20% by mass and a density of 0.05 g / cm. Three ~ 0.3g / cm Three A roll-shaped photosensitive material light-shielding package having a thickness of 0.5 mm to 2 mm.
According to the rolled photosensitive material light-shielding package (1) described above (hereinafter sometimes referred to as “packaging of the present invention”), the edge cylindrical core member has the above-mentioned foamed resin content, density, and thickness. Since the paper member is within the range, the optimum cushioning property can be imparted to the core in order to prevent problems of the roll-shaped photosensitive material.
[0014]
In addition, the roll-shaped light-sensitive light-shielding package of the present invention can be used for streaks or prints caused by winding pressure or light-shielding flange ribs, even if a photosensitive film having a recording layer on a plastic film is used. Blur can be effectively prevented.
[0015]
In the present specification, “to” indicates a value greater than or equal to the previous value and less than or equal to the subsequent value.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be specifically described.
The roll-shaped photosensitive material light-shielding package of the present invention includes at least a core having a paper member containing a foamed resin on the surface of a hollow cylindrical core member, and a roll-shaped photosensitive material wound around the outer periphery of the core. A film (hereinafter sometimes referred to simply as “photosensitive film”), a side light-shielding plate provided at both ends of the core having an insertion portion that fits into a hollow portion of the core, and the roll A light-shielding leader that is bonded to the end of the film-shaped photosensitive film and covers the roll-shaped photosensitive film, and the foamed resin content of the paper member is 3% by mass to 20% by mass, and the density is 0.05 g. / Cm Three ~ 0.3g / cm Three The thickness is 0.5 mm to 2 mm.
Thereby, the level | step difference produced by the front-end | tip part of the winding of a photosensitive film and the influence by the deformation | transformation of the core member by the rib of a flange can be relieve | moderated by the cushioning property of a paper member.
[0017]
The core in the present invention will be described with reference to FIG. FIG. 1 is a perspective view showing a roll-shaped photosensitive material using a core in the present invention. In FIG. 1, a roll-shaped photosensitive material 10 is constituted by winding a photosensitive film 2 around a core 1 in the present invention in a roll shape. Furthermore, the winding core 1 is comprised by the hollow cylindrical core member 1a and the paper member 1b which has the cushioning property provided in the outer peripheral surface.
[0018]
The effect | action which the paper member in this invention show | plays is demonstrated using FIG. 2 and FIG. In the core 1 in the present invention, the paper member 1b provided on the outer peripheral surface of the cylindrical core member 1a functions as a so-called cushion layer. An explanation will be given by taking, as an example, a streak-like fog generated due to the level difference of the photosensitive film. In this case, in the present invention, the starting end 2a at the beginning of winding of the photosensitive film sinks into the paper member 1b as shown in FIG. 2, so that the level difference caused by the starting end 2a of the photosensitive film is eliminated. As a result, the stress applied to the step by the winding pressure is relieved, and the occurrence of streak-like fog can be prevented.
[0019]
An explanation will be given by taking as an example printing blur caused by deformation of the core due to the rib of the flange. FIG. 3 is a sectional view showing a roll-shaped photosensitive material into which a flange provided with a rib is inserted. According to the present invention, the cylindrical core member 1a is deformed into a wave shape by the protruding ribs provided in the insertion portion 3a of the flange. However, as shown in FIG. Sinks into the paper member 1b having cushioning properties. That is, the deformation of the cylindrical core member 1a does not affect the shape of the contact surface of the core 1 with the photosensitive film 2 in the present invention. Thereby, the photosensitive film 2 is not adversely affected, and the occurrence of printing blur can be prevented.
[0020]
<Roll photosensitive material shading package>
Hereinafter, the roll-shaped photosensitive material light-shielding package will be sequentially described with a focus on members constituting the core in the present invention.
[0021]
<Core>
As described above, the core in the present invention is constituted by the cylindrical core member and the paper member.
-Cylindrical core member-
The cylindrical core member is preferably hollow so that at least both ends thereof are fitted with the insertion portions of the flange, and particularly preferably hollow over the entire length. Moreover, it is preferable that the said cylindrical core member has light-shielding property.
The material of the cylindrical core member is preferably paperboard, and more preferably paper configured by stacking paperboards such as kraft pulp paper and alkali pulp paper. The material of the paper is not particularly limited, but paper that has a small content of free sulfur and the like and does not affect the characteristics of the photosensitive film is preferable.
[0022]
1-10 mm is preferable and, as for the thickness of the cylindrical core member in this invention, 2-7 mm is more preferable. Further, the width of the cylindrical core member in the present invention is not particularly limited, and is suitably determined according to the purpose of the roll-shaped photosensitive material.
The cylindrical core member in the present invention can be made by generally laminating about 5 to 15 layers of paperboard in a spiral shape to a thickness of about 2 mm to 7 mm and cutting it to a required length. The laminated cores thus laminated usually have a necessary light shielding property, but for the purpose of further improving the light shielding property, a light shielding material can be appropriately added to the paperboard.
[0023]
-Paper member-
The paper member contains foamed resin and has cushioning properties.
The paper member is manufactured mainly from pulp. Examples of the pulp used include wood pulp such as chemical pulp and mechanical pulp of conifers and hardwood, non-wood natural pulp such as hemp and cotton, synthetic pulp made from polyethylene or prepropylene, waste paper pulp, etc. be able to. These pulps may be used in combination. In addition to the above pulp, various fibers such as glass fibers, carbon fibers, acrylic fibers, rayon fibers, phenol fibers, polyamide fibers, polyester fibers, and other fibers, and alumina fibers may be mixed.
As content of the pulp in the said paper member, 51 mass%-100 mass% are preferable, and 80 mass%-100 mass% are more preferable.
[0024]
The foamed resin used in the present invention can be used without particular limitation as long as it is a thermally expandable microcapsule in which a low-boiling solvent is enclosed in a microcapsule. From the standpoint of environmental friendliness, there is no risk of generating dioxins when incinerating used low-density foamed paper, heat from non-chlorine compounds such as polyacrylonitrile, acrylonitrile / alkyl methacrylate copolymer A capsule outer shell is preferable for the plastic resin. For example, as a commercially available product generally called a heat-expandable microcapsule, there is EXPANSEL 053WU (hereinafter referred to as # 053) and the like, and an outer shell of the capsule is formed with an acrylonitrile / alkyl methacrylate copolymer, The outer shell begins to soften at around 95 ° C. The capsule contains low-boiling hydrocarbon (isobutane), and its volume rapidly expands (foams) due to the internal pressure of gasified isobutane as the outer shell resin softens. The expansion ratio of the expanded resin particles alone becomes a maximum at around 143 ° C., and the internal pressure of isobutane becomes too high at a temperature higher than that, and the softened capsule is gradually broken (bubble breakage), and the expansion ratio is lowered. . For this reason, low density foamed paper can be obtained most efficiently by giving the foamed resin a temperature at which the expansion ratio is maximized without causing bubble breakage, and cooling and fixing while maintaining the foamed state.
[0025]
The foamed resin is used after being dispersed and stirred in about 5 times its own weight of water. An anionic surfactant such as a polycarboxylic acid type polymer is added to the foamed resin dispersion as a dispersion aid, and is effective in separating and dispersing aggregates by adding 0.3 to 0.8% of the foamed resin and stirring. There is. Commercially available products of the anionic surfactant include Poise 521 and Poise 530 (both manufactured by Kao Corporation). Since these surfactants are hydrophilic, adding 1.0% or more in combination with the sizing agent is not preferable because the paper size (the effect of preventing bleeding of ink or the like) is lowered. In addition to the anionic surfactants such as the above polycarboxylic acid type polymers, nonionic surfactants, cationic surfactants and amphoteric surfactants are used as dispersants added to the pulp slurry. May be.
[0026]
The foamed resin dispersion is passed through a strainer composed of a 100-150 mesh wire mesh or the like, or an anionic surfactant such as a polycarboxylic acid type polymer is added to the dispersion as a dispersion aid (hereinafter simply referred to as a dispersant). And about 0.5% of the solid content of the foamed resin is added and stirred, and then blended into a pulp slurry and uniformly dispersed in the slurry. Even if it is coarser than 100 mesh, the aggregation of the foamed resin particles is not eliminated, and unevenness occurs when foamed, resulting in an avatar-like fine protrusion. A finer mesh than 150 mesh is not suitable because it causes clogging with foam particles. Further, chemicals such as sizing agents and paper strength enhancing agents, fillers such as dyes and pigments, and the like may be further added depending on the intended use of the product.
[0027]
The expansion ratio of the foamed resin is preferably 5 to 100 times, and more preferably 40 to 80 times.
[0028]
In the present invention, the content of the foamed resin in the paper member is 3% by mass to 20% by mass. When the content of the foamed resin is less than 3% by mass, the cushioning property of the paper member is lowered, or it is difficult to impart the cushioning property, and when it exceeds 20% by mass, the discardability is degraded. The content of the foamed resin is preferably 5% by mass to 15% by mass.
[0029]
In the present invention, the density of the paper member is 0.05 g / cm. Three ~ 0.3g / cm Three It is. The density is 0.05 g / cm Three If it is less than 1, the repulsive force of the paper member is too low, and the cushioning property of the paper member is lowered. Can not be prevented. The density is 0.3 g / cm. Three If it exceeds, the repulsive force is too large, so that the external force received by the paper member cannot be sufficiently absorbed, and the effects of the present invention cannot be sufficiently exhibited as described above. The density of the paper member is 0.1 g / cm. Three ~ 0.2 g / cm Three Is preferred.
[0030]
In the present invention, the thickness of the paper member is 0.5 mm to 2 mm. If the thickness of the paper member is less than 0.5 mm, deformation of the core surface by the rib of the flange cannot be prevented, and if it exceeds 2 mm, there is a printing apparatus that cannot be used from the viewpoint of the product outer diameter of the roll-shaped photosensitive material. The thickness of the paper member is preferably 1 mm to 2 mm.
[0031]
The means for providing the paper member on the outer peripheral surface of the cylindrical core member is not particularly limited, but a method of forming the paper member in a sheet shape and winding the sheet-shaped paper member around the cylindrical core member is preferable. .
Examples of the method for producing the paper member include a method of producing a low-density and bulky paper by foaming a paper web obtained by blending foamed resin with pulp and heating. In the method, a thermally expandable microcapsule is used as the foamed resin to be added to the pulp, and the capsule is uniformly dispersed in the pulp slurry. At that time, the foamed resin particle diameter in the pulp slurry of the foamed resin is used. Then, after dispersing so that at least 100 mesh pass occupies 98% or more, this pulp slurry is made into paper and then heated and foamed.
[0032]
After making the pulp slurry, it is preferable to heat and foam the wet paper web before heating and foaming while maintaining the moisture content in the range of at least 41 to 60%. Moreover, in order to disperse | distribute the said foamed resin uniformly in a pulp slurry, you may use surfactant together. Furthermore, the foamed resin is added to the pulp slurry in a solid content of 5 to 20% in terms of solid content and then uniformly dispersed to form a wet paper web, and the moisture content of the wet paper web before heating and foaming is 41. After the state of ˜60%, the web is heated and foamed through a dryer.
[0033]
An anionic surfactant comprising a polycarboxylic acid type polymer when the microcapsules using an acrylonitrile-based thermoplastic resin as a capsule shell is selected as the foamed resin and the capsule is dispersed in the pulp slurry. Is preferably used as a dispersant and added in an amount of 0.3 to 0.8% based on the solid content of the expandable particles.
[0034]
Alternatively, after the microcapsules that are the foamed resin are passed through a strainer or screen having a 100 to 150 mesh sieve, the capsules are added to the pulp slurry and mixed uniformly, and the wet paper before heating and foaming You may heat-foam after making the moisture content of a web into the state of 41-60%.
[0035]
As the dryer, there are a cylinder dryer, a Yankee dryer, and the like. Generally, if a Yankee dryer is used, a paper with a smooth surface can be obtained, but the speed is slow, resulting in an increase in cost. However, this can be arbitrarily selected depending on the end use, and is not particularly limited. If the surface temperature of the dryer is 130 to 155 ° C., the low density foamed paper of the present invention can be obtained, but it is not limited to this temperature range. Since the relationship between the dryer surface temperature and web moisture, and the contact time between the web and the dryer are important factors for foaming, if the conditions for preventing foam breakage of the foamed resin are prepared when raising the dryer surface temperature, a good low It can be said that density foamed paper can be produced.
[0036]
<Roll photosensitive film>
Next, the photosensitive film wound around the winding core in the present invention will be described. Examples of the photosensitive film include long photosensitive films such as a color paper, a color negative film, an X-ray film, and a computer-type transfer paper. As the support for the photosensitive film, plastic films such as polyethylene terephthalate, polycarbonate, and cellulose triacetate, paper, polyethylene laminated paper, and the like are used. The plastic film is easily affected by pressure and the like due to deformation of the shape of the winding core, and the above-mentioned streaky fog and print blur are likely to occur. Therefore, the present invention is a photosensitive film using a plastic film as a support. The effect can be effectively exerted by using the winding core.
[0037]
The thickness of the photosensitive film is preferably 90 μm to 200 μm. When the core in the present invention is used for a roll-shaped photosensitive material using a photosensitive film having a thickness of 90 μm to 200 μm, the effects of the present invention can be sufficiently exhibited.
[0038]
Further, the maximum value of the floating amount of the photosensitive film from the beginning of winding to 2 m (the floating amount of the photosensitive edge from the smooth surface when the photosensitive film is placed on a smooth surface) is preferably 1.0 mm or less, 0.5 mm or less is more preferable.
[0039]
<Light-shielding packaging>
The package of the present invention is obtained by applying light-shielding packaging to the roll-shaped photosensitive material using the core in the present invention, and at least light-shielding flanges (side light-shielding plates) provided at both ends of the core. A light-shielding reader that is bonded to the end of the roll-shaped photosensitive film and wears the roll-shaped photosensitive film.
[0040]
(Side shading plate)
The light-shielding flange is usually composed of a disc-shaped flange portion and a cylindrical insertion portion provided at the center thereof. By inserting the cylindrical insertion portion into the hollow portion inside the cylindrical core member, it is effective to shield the roll-shaped photosensitive material from the side surface.
Further, the cylindrical insertion portion has a hole in the central portion through which a metal main shaft can be passed so that it can be loaded into exposure equipment such as a plate making scanner. In a laser scanner or the like, the main shaft is inserted inside the cylindrical insertion portion to support the photosensitive material at a predetermined position.
The outer diameter of the cylindrical insertion portion is slightly larger than the inner diameter of the cylindrical core member to be inserted, thereby obtaining a fitting force between the light shielding flange and the cylindrical core member. The relationship between the outer diameter of the cylindrical support portion and the inner diameter of the cylindrical core member is preferably set so that the fitting force is 30 kg to 60 kg. When the fitting force is 20 kg or less, there is a possibility that the light-shielding flange may be displaced or pulled out due to vibration or dropping during transportation of the photosensitive material package.
Moreover, since expansion of a cylindrical core member will become large when fitting force exceeds 70 kg, there exists a possibility that a cushion layer cannot absorb expansion of a cylindrical core member.
[0041]
ISO 14535 specifies two types of flanges (hard flange and flexible flange).
The hard flange is used in a specification in which a main shaft of an exposure apparatus is inserted. This hard light-shielding flange can be made by molding a wear-resistant polystyrene resin, high impact polystyrene resin, various polypropylene resins, ABS (acrylonitrile / butadiene / styrene copolymer) resin, or the like. Further, in order to obtain a necessary light shielding property, the resin is kneaded with a light shielding material such as carbon black before molding. The thickness of the light shielding flange is preferably 1 mm to 5 mm. Incidentally, according to the ISO 14535 standard, the thickness of the flange rim is defined as 3 mm ± 0.3 mm.
[0042]
It is preferable to provide protrusions, that is, ribs, on the outer periphery of the cylindrical insertion portion of the light shielding flange in order to increase the fitting force with the core. It is preferable to provide the rib in a tapered shape from the base of the cylindrical insertion portion close to the disc-shaped end portion toward the tip of the cylindrical insertion portion because it can be easily inserted into the core. Further, it can be easily pulled out after using the photosensitive material. Although the number of protrusions is not particularly limited, it is preferable that 4 to 8 protrusions are provided at equal intervals on the outer periphery of the insertion portion.
As a most preferable aspect, it is set to obtain a fitting force of about 5 kg to 20 kg in the case of a cylindrical support portion having no projection, and then provided with a projection to finally obtain a fitting force of 30 kg to 60 kg. preferable.
[0043]
(Light-shielding reader)
As the light-shielding leader, a thermoplastic resin film such as a polyethylene film or an OPP (stretched polypropylene) film is used.
A composite film in which a plurality of thermoplastic resin films are laminated can be used for the light-shielding leader. A heat-shrinkable film can also be used.
The light shielding property of the light shielding leader can be obtained by including a light shielding material such as carbon black.
[0044]
The light-shielding reader is configured as described in JP-A-6-175291, JP-A-8-62783 and JP-A-6-31465.
[0045]
When light-shielding packaging is applied to a roll-shaped photosensitive material, a long photosensitive film is wound around the core in the present invention, and then light-shielding having cylindrical insertion portions made of hard resin on both sides of the core in the present invention. It is only necessary to insert a photosensitive flange, bond a light-shielding leader wider than this width to the end of the photosensitive film, and then cover at least 1.5 times the outer peripheral length of the photosensitive material.
[0046]
When using a roll-shaped photosensitive material with light-shielding packaging, after removing the light-shielding leader following the photosensitive film, the unphotosensitive photosensitive film can be cut into a required size for use. In addition, it can be automatically recorded while being loaded into exposure equipment in a bright room and cut into sheets in the equipment. It can also be automatically wound around a recording drum and recorded in the exposure equipment.
[0047]
【Example】
Examples are shown below, but the present invention is not limited to these Examples.
[0048]
[Example 1]
A kraft pulp base paper (KP paper, manufactured by Koyo Paper Co., Ltd.) with a thickness of 0.5 mm is wound twice, and a 0.5 mm alkaline pulp base paper (NSA base paper, manufactured by Oji Paper Co., Ltd.) is wound twice. A paper-made cylindrical core member having a thickness of about 2 mm is produced, and a paper cushion material (paper member) having a foam resin content of 3% by mass and a density shown in Table 1 below is further formed thereon with a thickness of 0.5 mm. Winding cores A to D were obtained. These cores were prepared by continuously winding a base paper and a cushion material in a spiral shape so that the inner diameter becomes 71.15 mm, and cutting it into a length of 635 mm.
[0049]
The paper cushion material was produced by the following method.
A blended pulp consisting of 80% hardwood pulp (LBKP) and 20% softwood pulp (NBKP) was beaten to 580 ml with Canadian freeness (CFS). The aqueous dispersion of the foamed resin was adjusted. The foamed resin aqueous dispersion is passed through a standard sieve 100-150 mesh of JIS-z8801 to make the residue 2% or less, and the foaming agent is dispersed so as to be 9% based on the absolute dry mass of the pulp. Further, 0.2% of dry paper strength enhancer (Polystron 194-7, manufactured by Arakawa Chemical Industry Co., Ltd.) and 0% starch (Acedin AP-20, manufactured by Daiwa Chemical Co., Ltd.) are added. 0.8%, Alkyl ketene dimer sizing agent (Size Pine K287, manufactured by Arakawa Chemical Industries, Ltd.) 0.1%, Wet paper strength enhancer (WS515LX, manufactured by Nippon PMC Co., Ltd.) 0.25% The wet paper web before drying was adjusted so as to have a moisture content of 41% to 60%. In addition, all the addition amount of each said chemical | medical agent is the mass% of solid content with respect to an absolutely dry pulp, and the target basic weight of the produced handmade paper is 220 g / m 2 It is.
Thereafter, the web adjusted to 46% moisture was dried at a surface temperature of 135 ° C. and 145 ° C. with a rotary dryer (manufactured by Jappo Co., Ltd.) to obtain a paper cushion material (paper member) having the density shown in Table 1.
[0050]
Next, a light-shielding flange made of polystyrene resin kneaded with carbon black was produced so as to conform to the ISO 14535 standard. The dimensions of the light-shielding flange are the outer diameter of the flange part (130.80 mm), the outer diameter of the cylindrical insertion part (71.30 mm), the inner diameter of the hole provided in the center of the cylindrical insertion part (37.40 mm), the flange Part rim thickness (3.00 mm). Six protruding ribs were provided at regular intervals at the base of the cylindrical support portion. Since the maximum height of the protrusion is set to 0.35 mm, the maximum diameter of the cylindrical insertion portion is 72.00 mm.
[0051]
A roll-shaped photosensitive material was obtained by winding 61 m of an output photosensitive film for printing (manufactured by Fuji Film Co., Ltd .; trade name: NSL) having a width of 83.8 cm and a thickness of 102 μm with a tension of 5.0 kg around each of the above-described winding cores.
After that, in order to apply light-shielding packaging, the light-shielding flange described above is inserted into the hollow portion of the core from both ends, and a light-shielding reader is connected to the outermost end of the photosensitive film wound around the core to cover the outer peripheral surface of the photosensitive material. did. Finally, the roll-shaped photosensitive material light-shielding package of Example 1 was obtained, in which the final end of the light-shielding leader was taped to perform light-shielding packaging.
[0052]
The light-shielding leader is a 0.14 mm thick film containing carbon black in polyethylene resin, the width of the portion covering the photosensitive film is 65.7 cm, and the length of the covering portion is photosensitive. The length of the outer peripheral surface of the film was about 1.5 times.
[0053]
<Evaluation>
The obtained roll-shaped photosensitive material light-shielding package was stored for 3 days under conditions of 45 ° C. and Dry.
[0054]
-Floating amount at both ends of film-
About the roll-shaped photosensitive material after the said preservation | save, the photosensitive film from 2 m to the beginning of winding was set | placed on the horizontal base, and the maximum value of the floating amount of both ends was measured. The results are shown in Table 1.
[0055]
−Print test−
The roll-shaped photosensitive material after the storage is transported and exposed to the final part on the core side using DT-R3100 (manufactured by Dainippon Screen Mfg. Co., Ltd.). The film was evaluated according to the following criteria. The results are shown in Table 1.
[Evaluation]
(Double-circle): The printing blur was not recognized at all and it was excellent also in the conveyance property.
○: Some blurring of printing was recognized, but there was no practical problem. The transportability was good.
X: Print blur was remarkably observed, the transportability was poor, and there was a problem in practical use.
[0056]
[Examples 2-5, Comparative Examples 1-2]
In Example 1, except that the foamed resin content and density of the paper cushion material (paper member) were changed to the values shown in Table 1, a roll-shaped photosensitive material light-shielding package was produced in the same manner as in Example 1 and evaluated. I did it. The results are shown in Table 1.
[0057]
[Table 1]
Figure 0003771857
[0058]
[Comparative Example 3]
In Example 1, the density of the paper cushion material (paper member) is 0.4 g / cm. Three A roll-shaped photosensitive material light-shielding package was prepared and evaluated in the same manner as in Example 1 except that the foamed resin content was changed to the values shown in Table 2. The results are shown in Table 2.
[0059]
[Table 2]
Figure 0003771857
[0060]
As can be seen from Table 1, in the roll-shaped photosensitive material light-shielding package of the example using the core in the present invention, there was little occurrence of printing blur and the floating amount did not exceed 1.0 mm. On the other hand, in the roll-shaped photosensitive material light-shielding package using the cores of Comparative Examples 1 and 2 whose foaming resin content is not within the scope of the present invention, printing blur occurs and the floating amount exceeds 1.0 mm. was there. Furthermore, the density of the paper cushion (paper member) is 0.4 g / cm. Three In the rolled photosensitive material using the core of Comparative Example 3, the occurrence of printing blur was remarkably observed, and the amount of floating was large, which was outside the allowable range for practical use.
[0061]
[Example 6]
A kraft pulp base paper (KP paper, manufactured by Koyo Paper Co., Ltd.) with a thickness of 0.5 mm is wound twice, and a 0.5 mm alkaline pulp base paper (NSA base paper, manufactured by Oji Paper Co., Ltd.) is wound twice. A paper cylindrical core portion having a thickness of about 2.0 mm is manufactured, and a paper cushion material (paper member) having a foamed resin content of 3% by mass and a density shown in Table 3 below is further formed thereon. Winding cores A ′ to D ′ were obtained so as to be 0.0 mm. These cores were prepared by continuously winding a base paper and a cushion material in a spiral shape so that the inner diameter becomes 71.15 mm, and cutting it into a length of 635 mm.
The paper cushion material (paper member) was produced in the same manner as in Example 1.
[0062]
A roll-form photosensitive material was obtained by winding 36 m of an output photosensitive film for printing (product name: HL-175, manufactured by Fuji Film Co., Ltd .; trade name: HL-175) having a width of 83.8 cm and a thickness of 175 μm around each of the winding cores described above.
Thereafter, in order to apply light shielding packaging, the light shielding flange described above is inserted into the hollow portion of the core from both ends, and the light shielding reader is connected to the outermost end of the photosensitive film wound around the core, and the outer peripheral surface of the photosensitive material. Was coated. Finally, the roll-shaped light-sensitive material light-shielding package of Example 6 was obtained, in which the final end of the light-shielding leader was taped to perform light-shielding packaging.
[0063]
<Evaluation>
-Striped head-
The obtained roll-shaped light-sensitive material light-shielding package was stored for 3 days under conditions of 45 ° C. and Dry, and then the length at which the step at the beginning of the winding of the photosensitive film became a streak was measured. The results are shown in Table 3. In addition, the length in which the streak-like fog occurs is less than 2.5 m in practical tolerance, and preferably less than 1 m.
[0064]
[Examples 7 to 10, Comparative Examples 4 to 5]
In Example 6, except that the foamed resin content and density of the paper cushion material (paper member) were changed to the values shown in Table 3, a roll-shaped photosensitive material light-shielding package was produced in the same manner as in Example 6 and evaluated. I did it. The results are shown in Table 3.
[0065]
[Table 3]
Figure 0003771857
[0066]
[Comparative Example 6]
In Example 6, the density of the paper cushion material (paper member) was 0.4 g / cm. Three A roll-shaped photosensitive material light-shielding package was prepared and evaluated in the same manner as in Example 6 except that the foamed resin content was changed to the values shown in Table 4. The results are shown in Table 4.
[0067]
[Table 4]
Figure 0003771857
[0068]
As can be seen from Tables 3 and 4, the roll-shaped photosensitive material light-shielding package of the example using the core in the present invention was less than 2.5 m in length in which the occurrence of streaks was observed. . On the other hand, in the roll-shaped photosensitive material light-shielding package using the cores of Comparative Examples 4 and 5 whose foaming resin content is not within the scope of the present invention, the occurrence of streaky fogging is recognized by 4 m or more, which is practically acceptable. It was out of range. Furthermore, the density of the paper cushion material (paper member) is 0.4 g / cm. Three The roll-shaped photosensitive material light-shielding package using the core of Comparative Example 6 was also out of the practically acceptable range because the occurrence of streaks was noticeably observed.
[0069]
[Comparative Example 7]
In Example 6, a roll-shaped photosensitive material light-shielding package was prepared and evaluated in the same manner as in Example 6 except that a 3 mm thick paper core without a paper cushion was used as the core. As a result, the length at which the streak-like fog occurred was 13 m, which was outside the allowable range for practical use.
[0070]
【The invention's effect】
According to the present invention, it is possible to provide a roll-shaped photosensitive material light-shielding package that prevents problems such as pressure fogging and printing blur and is excellent in discardability after use.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a rolled photosensitive material using a winding core in the present invention.
FIG. 2 is an explanatory view showing the action of the core in the present invention.
FIG. 3 is a cross-sectional view showing a roll-shaped photosensitive material light-shielding package in which a flange provided with a rib is inserted.
FIG. 4 is a perspective view showing a conventional roll-shaped photosensitive material light-shielding package.
FIG. 5 is a side view for explaining a conventional winding core in which the periphery of the edge portion is deformed along the shape of a rib.
[Explanation of symbols]
1 core
1a Tubular core member
1b Paper member
2 Photosensitive film
3 Light shielding flange
4 ribs
5 Shading reader
10 Rolled photosensitive material

Claims (1)

少なくとも、中空の円筒状芯部材表面に発泡樹脂を含む紙部材を有する巻芯と、前記巻芯の外周にロール状に巻き付けられたロール状感光性フィルムと、前記巻芯の中空部に嵌合する挿入部を有し、前記巻芯の両端に設けられた側面遮光板と、前記ロール状感光性フィルムの終端に接合されて前記ロール状感光性フィルムを被服する遮光性リーダーと、を備えたロール状感光材料遮光包装体であって、前記紙部材は、発泡樹脂含有率が3質量%〜20質量%、密度が0.05g/cm3〜0.3g/cm3、厚さが0.5mm〜2mmであることを特徴とするロール状感光材料遮光包装体。Fits at least a winding core having a paper member containing a foamed resin on the surface of a hollow cylindrical core member, a roll-shaped photosensitive film wound around the outer periphery of the winding core, and a hollow portion of the winding core A side light-shielding plate provided at both ends of the core, and a light-shielding reader bonded to the end of the roll-shaped photosensitive film and covering the roll-shaped photosensitive film. In the roll-shaped photosensitive material light-shielding package, the paper member has a foamed resin content of 3% by mass to 20% by mass, a density of 0.05 g / cm 3 to 0.3 g / cm 3 , and a thickness of 0.1%. A roll-shaped light-sensitive material light-shielding package having a thickness of 5 mm to 2 mm.
JP2002074341A 2002-03-18 2002-03-18 Rolled photosensitive material shading package Expired - Fee Related JP3771857B2 (en)

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US7102518B2 (en) * 2004-04-05 2006-09-05 Sonoco Development, Inc. Removable identification device for multilayer tubular structures
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