JP2002293481A - Core, core for photograph support and winding of photograph support using the same - Google Patents
Core, core for photograph support and winding of photograph support using the sameInfo
- Publication number
- JP2002293481A JP2002293481A JP2001094994A JP2001094994A JP2002293481A JP 2002293481 A JP2002293481 A JP 2002293481A JP 2001094994 A JP2001094994 A JP 2001094994A JP 2001094994 A JP2001094994 A JP 2001094994A JP 2002293481 A JP2002293481 A JP 2002293481A
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- core
- moisture
- paper
- base material
- layer
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、巻芯付近に巻き取
られた支持体に対して水分などの品質上の影響を与え
ず、しかも安価に提供できる巻芯、特に、湿度や温度な
どの環境条件の変化に対して、巻き取られた支持体に悪
影響を与えることのない安価な巻芯、写真用支持体に有
用な巻芯及びそれを用いた写真用支持体巻取りに関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core that can be provided at a low cost without affecting the quality of moisture or the like on a support wound around the core, and in particular, for controlling humidity and temperature. The present invention relates to an inexpensive winding core that does not adversely affect a wound support against changes in environmental conditions, a core useful for a photographic support, and a photographic support winding using the same. .
【０００２】[0002]
【従来の技術】支持体に塗布、または表面処理などを施
した製品は、産業上広く用いられており、これらの製品
には、例えば、ハロゲン化銀写真材料、インクジェット
記録材料、熱移行型熱転写記録受像材料、感熱記録材
料、感光感熱記録材料等があり、支持体上には、それぞ
れハロゲン化銀写真構成層、インク受像層、熱移行型熱
転写記録受像層、感熱発色層、感光感熱発色層等の画像
形成層及び必要に応じて下引き層、保護層、バック層等
の補助機能層が塗設されている。特に、ハロゲン化銀写
真構成層としては、ハロゲン化銀写真乳剤層、保護層、
下引き層、中間層あるいは色混り防止層、ハレーション
防止層、もしくはフィルター層、紫外線吸収層、バック
層等およびそれらの組み合わせから構成されたものであ
り、高価な材料のものが多く、歩留まりの向上が強く要
求され、また、巻取として輸送された後の巻芯付近の材
料もできるだけ使用することが理想的であり、巻き取り
となした際、巻き取りの外周部と巻芯部に品質上の差が
ないことが強く求められている。2. Description of the Related Art Products coated or surface-treated on a support are widely used in industry. These products include, for example, silver halide photographic materials, ink jet recording materials, and heat transfer type thermal transfer materials. There are a recording image receiving material, a heat-sensitive recording material, a light-sensitive heat-sensitive recording material, and the like. On the support, a silver halide photographic component layer, an ink image-receiving layer, a heat transfer type thermal transfer recording image-receiving layer, a heat-sensitive color-forming layer, and a photosensitive heat-sensitive color-forming layer are respectively provided. And an auxiliary functional layer such as an undercoat layer, a protective layer, and a back layer, if necessary. In particular, the silver halide photographic constituent layers include a silver halide photographic emulsion layer, a protective layer,
It is composed of an undercoating layer, an intermediate layer or an anti-color mixing layer, an antihalation layer, or a filter layer, an ultraviolet absorbing layer, a backing layer, and a combination thereof. It is ideal to use the material near the core after it has been transported as a reel, and it is ideal to use as much material as possible. It is strongly required that there is no difference.
【０００３】写真用支持体の場合、巻芯から数回巻き上
げた巻芯に近い支持体部分は、巻芯の影響を受けている
ことから、いわゆる下巻きブローク部分として、製品と
することなく、ブロークにすることがある。従って、写
真用支持体用巻芯においては、下巻き部のブロークをで
きるだけ少なくするために巻芯にいろいろな工夫が試み
られている。[0003] In the case of a photographic support, a support portion close to the core wound up several times from the core is affected by the core, so that it is used as a so-called lower winding broke portion without forming a product. May be broke. Therefore, in the core for a photographic support, various attempts have been made for the core in order to minimize the breakage of the lower winding part.
【０００４】特開平04-94379号公報には、ウエブを巻付
ける巻芯の芯体の外周面に形状記憶樹脂層を形成し、巻
芯の劣化を無くし、復元力をもたせ、ウェブの切口部の
形状の型押し跡を解消できるウェブ巻取用巻芯が開示さ
れている。同巻芯は何回も使われることを条件にしてお
り長距離輸送における回収なしの巻芯として用いるのは
際めてコストの高い巻芯となってしまう問題がある。[0004] Japanese Patent Application Laid-Open No. 04-94379 discloses that a shape memory resin layer is formed on an outer peripheral surface of a core body of a winding core around which a web is wound, thereby eliminating deterioration of the winding core, providing a restoring force, and providing a cut portion of a web. There is disclosed a web take-up core which can eliminate the embossing mark of the shape. The core is required to be used many times, and if used as a core without recovery in long-distance transport, there is a problem that the core becomes extremely expensive.
【０００５】長距離輸送を行う巻き取りにあっては、特
に船積みを含む長距離輸送では、回収過程で巻芯が傷ん
だり、環境条件の変化によって巻芯の変質が起こり、あ
るいは、回収の輸送コストが嵩むので、回収のコスト以
下の安価なワンウェイ用巻芯が必要となってきている。
一方、安価な巻芯にすると、下巻部で支持体に長距離、
長時間の輸送中に、巻芯側から支持体の水分が抜けた
り、逆に、巻芯側から水分が支持体に移動し、支持体及
び支持体上の塗設層に悪い影響を与える問題がある。[0005] In the winding operation for long-distance transportation, especially in long-distance transportation including shipping, the winding core is damaged during the recovery process, the core is deteriorated due to a change in environmental conditions, or the recovery transportation is performed. Since the cost is increased, an inexpensive one-way core that is less than the cost of recovery is required.
On the other hand, if a cheap core is used, a long distance
During transportation for a long time, moisture in the support escapes from the core side, or conversely, moisture moves from the core side to the support, which adversely affects the support and the coating layer on the support. There is.
【０００６】写真用支持体においては、乳剤層の硬膜に
原紙の水分が必要であることが解っており、簡単な紙芯
では写真用支持体の原紙水分が抜けてしまい、巻芯付近
の写真用支持体を用いると硬膜の効かない写真印画紙と
なってしまう問題を惹起してしまう。更にひどい場合
は、輸送中に高温多湿に曝され、巻芯中の微量成分が、
支持体側に移行し、カブリとなることがあり、これらの
トラブルをなくすために巻芯付近の写真用支持体を長尺
に亘ってブロークにしなければならない。品質安定性も
含め回収コストより安価な巻芯が求められている。It has been found that, in a photographic support, the water content of the base paper is required for the hardening of the emulsion layer. The use of a photographic support causes a problem that the resulting photographic printing paper does not work effectively. In the worst case, it is exposed to high temperature and high humidity during transportation, and trace components in the core are
It may migrate to the support side and cause fogging. In order to eliminate these troubles, the photographic support near the core must be broken over a long length. There is a need for a core that is cheaper than the recovery cost, including quality stability.
【０００７】[0007]
【発明が解決しようとする課題】従って、本発明の目的
は、いかなる環境条件の変化にも巻き取られている支持
体に悪影響を与えない、しかも安価な巻芯であり、特
に、写真用支持体を巻き取るために有用な写真用支持体
用巻芯を提供し、巻芯付近の支持体も製品に使うことの
できる原紙の水分ぬけが抑制され、写真性にも影響しな
い写真用支持体巻き取りを得ることを目的とする。Accordingly, it is an object of the present invention to provide an inexpensive winding core which does not adversely affect the wound support under any change in environmental conditions. Provide a core for a photographic support useful for winding up the body, and the support near the core can be used for the product. The aim is to obtain winding.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、上記課題
を解決すべく鋭意検討した結果、以下の本発明を見いだ
した。すなわち、請求項１の発明は、紙を構造材とする
円筒状巻芯であって、母材の最外層付近に防湿層が設け
られていることを特徴とする巻芯の発明である。Means for Solving the Problems The present inventors have made intensive studies to solve the above problems, and as a result, have found the following present invention. That is, the invention of claim 1 is an invention of a core which is a cylindrical core made of paper as a structural material, wherein a moisture-proof layer is provided near the outermost layer of the base material.
【０００９】請求項２の発明は、巻芯の母材が、未晒し
クラフトパルプであることを特徴とする請求項１に記載
の巻芯の発明である。A second aspect of the present invention is the invention of the first aspect, wherein the base material of the core is unbleached kraft pulp.
【００１０】請求項３の発明は、防湿層の材質がアルミ
箔であることを特徴とする請求項１または２に記載の巻
芯の発明である。The invention according to claim 3 is the invention according to claim 1 or 2, wherein the material of the moisture-proof layer is aluminum foil.
【００１１】請求項４の発明は、紙を構造材とする円筒
状巻芯であって、母材の最外層付近に防湿層が設けられ
ていることを特徴とする写真用支持体用巻芯の発明であ
る。According to a fourth aspect of the present invention, there is provided a cylindrical core comprising paper as a structural material, wherein a moisture-proof layer is provided near an outermost layer of the base material. Invention.
【００１２】請求項５の発明は、紙を構造材とする円筒
状巻芯の母材の最外層付近に防湿層が設けられている巻
芯に、該巻芯の母材水分より多い水分を有する原紙の両
面をポリオレフィン樹脂で被覆した写真用支持体を捲回
した写真用支持体巻取りの発明である。According to a fifth aspect of the present invention, a core provided with a moisture-proof layer near the outermost layer of a base material of a cylindrical core made of paper is provided with water more than the base material moisture of the core. It is an invention of winding a photographic support in which a photographic support having both sides of a base paper coated with a polyolefin resin is wound.
【００１３】[0013]
【発明の実施の形態】以下、本発明の巻芯、写真用支持
体用巻芯及び該巻芯を用いた写真用支持体巻取りについ
て、図とともに詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION The core of the present invention, the core for a photographic support, and the winding of a photographic support using the core will be described in detail with reference to the drawings.
【００１４】図１は本発明の巻芯の断面図を示す。１は
紙を構造材とする母材、２は防湿層、３は巻芯全体を示
す。母材１は、紙を何層にも接着剤ととも硬く巻いた
り、湿紙を巻き固め乾燥して得られる紙を構造材として
所定の強度を得る。その肉厚は必要により調節すされる
ものであるが、写真用支持体用巻芯の場合は、強度とコ
ストを考慮して厚さ５０ｍｍ以下、５ｍｍ以上が好まし
い。紙の中でも、パルプ化の過程で化学的に傷められて
おらず強度の低下のない、しかも繊維長の長い未晒しク
ラフトパルプ（ＵＫＰ）を用いた紙を構造材とすること
が好ましく、更に、安価で密度の出る未晒し広葉樹パル
プ（ＬＵＫＰ）が好ましい。母材を構成する紙の水分は
強度を確保するために３．５〜８．０％にすることが好
ましく、４．５〜６．５％がより好ましい。３．５％よ
り少なくすると、もろくなったり、外部環境により吸湿
が激しく巻芯の寸法に変化を来す場合がある。８．０％
より多くすると強度が低下する傾向がある。多湿環境化
で吸湿し、接着剤を用いていると紙層間や、特に防湿層
と母材との界面での接着がゆるむことも起きる。FIG. 1 shows a sectional view of a core of the present invention. Reference numeral 1 denotes a base material using paper as a structural material, 2 denotes a moisture-proof layer, and 3 denotes the entire core. The base material 1 obtains a predetermined strength by wrapping paper in several layers with an adhesive, or by wrapping and drying a wet paper and drying the obtained paper as a structural material. The thickness is adjusted as required, but in the case of a core for a photographic support, the thickness is preferably 50 mm or less and 5 mm or more in consideration of strength and cost. Among the papers, it is preferable to use a paper made of unbleached kraft pulp (UKP), which is not chemically damaged during the pulping process and has no strength reduction, and has a long fiber length, and furthermore, Unbleached hardwood pulp (LUKP), which is inexpensive and dense, is preferred. The water content of the paper constituting the base material is preferably set to 3.5 to 8.0% in order to secure the strength, and more preferably 4.5 to 6.5%. If it is less than 3.5%, the core may become brittle, or may be strongly absorbed by the external environment, resulting in a change in the dimensions of the core. 8.0%
If it is larger, the strength tends to decrease. If moisture is absorbed in a humid environment and an adhesive is used, the adhesion between paper layers, particularly at the interface between the moisture-proof layer and the base material, may be loosened.
【００１５】防湿層２は、紙を構造材とする母材の最外
層付近に糊で貼着積層される。防湿層が母材の上に露出
する形で設けられてもよいが、母材を構成する紙で挟ま
れている方が、巻芯と一体となって、表面強度を低下し
ないので好ましい。従って、出来るだけ上層にあること
が好ましいことではあるが、巻芯外表面より母材の厚み
の４０％以内、２％以上の位置に設けられることが好ま
しい。例えば、母材の厚みが、１０ｍｍの場合、巻芯外
表面より２〜３ｍｍ内層に設けられることが、防湿効
果、巻芯の強度、防湿層の保護の点で好ましい。尚、防
湿層の上の母材は強度が確保されて、厚みが小さい方が
好ましいのであるから、母材の厚みが５０mmであつても
巻芯外表面より２〜３ｍｍ内層に設けられることが好ま
しいこともあり得る。The moisture-proof layer 2 is attached and laminated with glue near the outermost layer of a base material made of paper as a structural material. The moisture-proof layer may be provided so as to be exposed on the base material. However, it is preferable that the moisture-proof layer is sandwiched between the papers constituting the base material, since it is integrated with the core and the surface strength is not reduced. Therefore, although it is preferable that the base material be as high as possible, it is preferable that the base material be provided at a position within 40% and 2% or more of the thickness of the base material from the outer surface of the core. For example, when the thickness of the base material is 10 mm, it is preferable that the base material is provided in an inner layer of 2 to 3 mm from the outer surface of the core in view of the moisture-proof effect, the strength of the core, and the protection of the moisture-proof layer. The strength of the base material on the moisture-proof layer is ensured, and it is preferable that the thickness is small. Therefore, even if the base material has a thickness of 50 mm, it may be provided in the inner layer of 2 to 3 mm from the outer surface of the core. It may be preferable.
【００１６】防湿層を構成する材質としては、母材の水
分を巻き取られた支持体に移動させないような素材であ
れば、特に制限無く用いることが出来、ポリエステルな
どの合成樹脂フィルムでもよいが、紙との接着加工性、
湿度その他の化学物質の遮断性の点から金属箔が好まし
く、安価な点からもアルミ箔が最も良い。その厚さは防
湿効果があれば特に問わないが、１０μm〜３mmが好ま
しい。１０μm未満であると貼着の工程中にシワがはい
ったりして孔があく危険性があり、３mmより厚くなると
変形が効かず、紙の繊維の凹凸とのなじみが小さくなり
好ましくない傾向がでる。As the material constituting the moisture-proof layer, any material can be used without particular limitation as long as it does not allow the moisture of the base material to move to the wound support, and a synthetic resin film such as polyester may be used. , Adhesive workability with paper,
A metal foil is preferable in terms of barrier properties against humidity and other chemical substances, and an aluminum foil is most preferable in terms of inexpensiveness. The thickness is not particularly limited as long as it has a moisture-proof effect, but is preferably from 10 μm to 3 mm. If it is less than 10 μm, there is a risk that wrinkles may be formed during the sticking process and a hole may be formed. If the thickness is more than 3 mm, deformation does not work, and the adaptation to the irregularities of the fiber of the paper tends to be unfavorable. .
【００１７】巻芯の直径、長さ、母材厚さには特に制限
はない。必要とされる強度、巻取装置に合致した径のも
のを用いれば良い。このようにして、得られた巻芯３
は、高温多湿地域の環境条件下の輸送中であっても巻芯
付近の下巻きの支持体への影響を最小限にすることがで
きる。The diameter, length, and base material thickness of the core are not particularly limited. What is necessary is just to use what has the required intensity | strength and the diameter matched with the winding device. The core 3 thus obtained is
Can minimize the influence of the lower winding near the core on the support even during transportation under environmental conditions in a hot and humid area.
【００１８】上記に示すように、巻芯の経済性、強度を
勘案すると未晒しクラフトパルプを用いて比較的、低水
分の巻芯とすることが好ましく、一方、原紙の両面をポ
リオレフィン樹脂で被覆した写真用支持体の原紙水分
は、写真乳剤の硬膜を促進する作用があることが解って
いるので６．５〜９．５％と比較的高い水分が要求され
る。従って、低い水分の巻芯の上にそれより高い水分の
写真用支持体が捲回される写真用支持体巻き取りが造ら
れることになり、下巻部分は長期に保存される場合、巻
芯の水分値の影響を強く受けることとなる。その結果、
巻芯付近の写真用支持体の水分は巻芯側に抜けてしま
い、硬膜の効かない印画紙となってしまう。逆に、巻芯
の含有水分値が高くなる場合、巻取の下巻部分の写真用
支持体の水分値も初期設定値に比べると高くなってしま
い、それとともにカブリ成分も移動し、カブリを引き起
こす原因となる。As described above, in consideration of the economic efficiency and strength of the core, it is preferable to use a non-exposed kraft pulp to make the core relatively low in moisture. On the other hand, both sides of the base paper are coated with a polyolefin resin. Since the water content of the base paper of the photographic support is known to have an effect of promoting the hardening of the photographic emulsion, a relatively high water content of 6.5 to 9.5% is required. Therefore, a photographic support reel is produced in which a higher moisture photographic support is wound on a lower moisture core, and when the lower winding portion is stored for a long period of time, the lower core of the core is wound. It is strongly influenced by the moisture value. as a result,
Moisture of the photographic support near the core escapes to the core side, resulting in a photographic paper in which the hardening does not work. Conversely, when the water content of the core is high, the water value of the photographic support in the lower part of the winding is also higher than the initial set value, and the fog component also moves with it, causing fog. Cause.
【００１９】しかしながら、環境条件によって、写真用
支持体が影響を受けないように、本発明の巻芯３は、母
材１の最外層付近に防湿材によって防湿層２を有してい
るので、環境条件が変化し、母材の含有水分量が変化し
ても、写真用支持体にその影響が生じることはなく、高
価なエポキシ化ロールと同じように、巻芯付近の写真用
支持体も製品に供することができる。However, since the core 3 of the present invention has the moisture-proof layer 2 near the outermost layer of the base material 1 so that the photographic support is not affected by environmental conditions, Even if the environmental conditions change and the moisture content of the base material changes, the effect does not occur on the photographic support, and like the expensive epoxidized roll, the photographic support near the winding core also Can be offered to the product.
【００２０】本願発明の巻芯を用いる支持体及び塗設層
を設けた紙としては、写真用支持体は当然のことなが
ら、感熱紙、インクジェット紙、感圧紙、磁気記録紙が
上げられる。写真用支持体は、原紙の両面を樹脂被覆さ
れた写真用支持体以外に、本願発明の目的効果からして
原紙自体を包含する。Examples of the paper provided with the support and the coating layer using the core of the present invention include heat-sensitive paper, ink-jet paper, pressure-sensitive paper, and magnetic recording paper, as well as photographic supports. The photographic support includes not only the photographic support in which both sides of the base paper are coated with resin, but also the base paper itself in view of the effects of the present invention.
【００２１】[0021]
【実施例】以下、実施例により本発明を詳しく説明する
が、本発明の内容は以下に示す実施例に限られるもので
はない。EXAMPLES The present invention will be described below in detail with reference to examples, but the contents of the present invention are not limited to the following examples.
【００２２】実施例１ 円筒状巻芯円筒の母材として、広葉樹未晒しクラフトパ
ルプからなる紙を湿紙の状態で固く巻き乾燥して紙製巻
芯を内径１８０ｍｍ（厚さ１０ｍｍ）に作製し、その外
側に防湿材としてアルミ箔（１００μm）を貼着積層
し、更にその上に未晒しクラフトパルプからなる紙を貼
着し３mmの厚さに巻いて巻芯とした。防湿層と紙の接着
はポバールを用いた。この巻芯を用いて、写真用支持体
をその上に捲回して巻取りを作成し、該巻取を母材が表
１記載の水分値を有する状態で３ヶ月間置き、その後の
巻き取られた写真用支持体に乳剤層を付与してカブリ性
及び乳剤膜付き性の程度を調査した。その他、製造コス
ト、使用時の力学強度も評価した。巻き取りに使用した
写真用支持体は水分が８．５％の厚さ１２７μmの原紙
に写真乳剤が設けられる側に酸化チタンを１２％含むLD
PEを３２μm、その反対側にHDPE／LDPE=80／20の比で混
合したポリエチレンを２６μm被覆したものである。Example 1 As a base material for a cylindrical core, paper made of hardwood unexposed bleached kraft pulp was wound tightly in the form of wet paper and dried to produce a paper core with an inner diameter of 180 mm (thickness 10 mm). An aluminum foil (100 μm) as a moisture-proof material was adhered and laminated on the outside, and a non-exposed paper made of kraft pulp was adhered thereon and wound into a thickness of 3 mm to form a core. Poval was used for adhesion between the moisture-proof layer and the paper. Using this core, a photographic support is wound thereon to form a winding, and the winding is placed for 3 months in a state where the base material has the moisture value shown in Table 1, and then the winding is performed. An emulsion layer was provided on the obtained photographic support, and the degree of fogging and the ability to form an emulsion film were examined. In addition, the manufacturing cost and the mechanical strength during use were also evaluated. The photographic support used for winding was a LD containing 12% of titanium oxide on the side on which a photographic emulsion was provided on a base paper having a thickness of 127 μm and a moisture of 8.5%.
PE was 32 μm, and the other side was coated with polyethylene mixed at a ratio of HDPE / LDPE = 80/20 at 26 μm.
【００２３】実施例２〜１０ 表１に記載されているように構成を変えた以外は実施例
１と同様に実験し評価した。結果を表１に示す。Examples 2 to 10 Experiments and evaluations were performed in the same manner as in Example 1 except that the configuration was changed as described in Table 1. Table 1 shows the results.
【００２４】比較例１〜３ 防湿材を用いず、表１に記載されているように構成を変
えた以外は実施例と同様に行った。結果を表１に示す。Comparative Examples 1 to 3 The same procedures were performed as in the Examples except that the moisture-proof material was not used and the configuration was changed as shown in Table 1. Table 1 shows the results.
【００２５】得られた写真用印画紙のカブリの評価方法
としては、以下に記載の方法で評価した。 ［印画紙のカブリ性評価］得られた写真印用画紙を５０
℃、ドライの条件下で５０時間放置し、未露光で現像し
て、白色部分の濃度の程度によってカブリの判定を行っ
た。評価基準としては、以下の通りである。 ◎：カブリの発生がほとんどなく良好。 ○：カブリの発生が少なく良好。 △：カブリの発生がやや多いが、実用上問題ない程度。 ×：カブリの発生が多くて、実用上問題がある。 なお、写真用印画紙として満足できるレベルは、△以上
である。The fogging of the obtained photographic printing paper was evaluated by the following method. [Evaluation of fogging property of photographic paper]
The film was allowed to stand for 50 hours under dry conditions at a temperature of 0 ° C., developed without exposure, and the fog was determined based on the density of the white portion. The evaluation criteria are as follows. ：: good with almost no fogging ：: good with little fogging Δ: Fog is slightly generated, but there is no practical problem. X: There are many fogs, and there is a problem in practical use. The level that can be satisfied as a photographic paper is △ or more.
【００２６】得られた写真用印画紙の乳剤膜付きの評価
方法としては、以下に記載の方法で評価した。 ［印画紙の乳剤膜付き性］乳剤膜付き性は、得られた写
真用印画紙を現像後、釘にて縦横にそれぞれ１ｃｍ間隔
で乳剤面を引掻き、碁盤目状の傷を付け、その後流水中
で指先でその面を擦り、乳剤層の剥離の程度で評価し
た。評価基準としては以下の通りである。 ◎：乳剤層の剥離がなく、膜付きが良好。 ○：乳剤層の剥離がわずかあるが、実用上問題ない。 △：乳剤層の剥離がやや多いが、実用上下限。 ×：乳剤層の剥離が多く膜付きが実用上問題がある。The photographic printing paper obtained was evaluated for the presence of an emulsion film by the following method. [Emulsion film-coating property of photographic paper] The emulsion film-coating property was determined by developing the obtained photographic paper, scratching the emulsion surface with nails at 1 cm intervals vertically and horizontally, making a grid-like scratch, and then running water. The surface was rubbed with a fingertip in the inside, and the degree of peeling of the emulsion layer was evaluated. The evaluation criteria are as follows. ：: No peeling of emulsion layer, good film formation. ：: little peeling of emulsion layer, but no problem in practical use. Δ: Peeling of the emulsion layer was slightly large, but practically the lower limit. X: The emulsion layer was peeled off a lot, but there was a problem in practical use.
【００２７】[0027]
【表１】 [Table 1]
【００２８】上記表１から明らかなごとく、本発明にお
ける写真用支持体用巻芯は、母材の水分値に関係なく、
巻き取られた写真用支持体に悪影響を及ぼさない優れた
巻芯であることがわかる。また、防湿層の厚さは、１０
μm以上、３ｍｍまでが好ましいことが判る。防湿層に
用いられる材質はアルミが最もよく、ポリエチレン（P
E）の場合は防湿効果が弱く、材質の選択を考慮すべき
である。防湿層の位置は母材の最外層付近がよいが、表
面であると傷み易く好ましくはない。母材の芯側になる
と支持体と接する側の母材の量が多くなるので好ましく
はない。母材の材質は、未晒し広葉樹クラフトパルプ
（LUKP）が強度、安価な点で好ましく、不純物を有して
いても防湿層で遮断され、カブリ等の写真性への影響が
防がれている。As is evident from Table 1 above, the core for a photographic support in the present invention was obtained irrespective of the moisture value of the base material.
It can be seen that this is an excellent core that does not adversely affect the wound photographic support. The thickness of the moisture-proof layer is 10
It is understood that the thickness is preferably from μm to 3 mm. Aluminum is the best material used for the moisture barrier, and polyethylene (P
In the case of E), the moisture-proof effect is weak, and selection of the material should be considered. The position of the moisture-proof layer is preferably near the outermost layer of the base material. It is not preferable to be on the core side of the base material because the amount of base material on the side in contact with the support increases. The material of the base material is preferably unbleached hardwood kraft pulp (LUKP) in terms of strength and inexpensiveness. Even if it has impurities, it is cut off by the moisture-proof layer and the influence on photographic properties such as fog is prevented. .
【００２９】[0029]
【発明の効果】本発明の巻芯は、母材の周りに防湿層が
設けられているため、いかなる環境条件でも、巻き取ら
れた支持体に悪影響を与えない。特に写真用支持体用巻
芯として有用であり、これを用いた写真印画紙用支持体
巻き取りは長距離輸送中の環境変化に対しても下巻き部
分の品質を巻き取り中央部分の支持体の品質と同様に維
持することができる。Since the core of the present invention has a moisture-proof layer around the base material, it does not adversely affect the wound support under any environmental conditions. It is particularly useful as a core for a photographic support, and the photographic printing paper support winding using the same supports the quality of the lower wrapping part against environmental changes during long-distance transportation. Quality can be maintained as well.
【図１】図１は本発明の巻芯の断面図を示す。FIG. 1 shows a sectional view of a winding core of the present invention.
１ 母材 ２ 防湿層 ３ 巻芯 1 Base material 2 Moistureproof layer 3 Core
Claims (5)
母材の最外層付近に防湿層が設けられていることを特徴
とする巻芯。1. A cylindrical core comprising paper as a structural material,
A core having a moisture-proof layer provided near the outermost layer of a base material.
あることを特徴とする請求項１に記載の巻芯。2. The core according to claim 1, wherein the base material of the core is unbleached kraft pulp.
徴とする請求項１または２に記載の巻芯。3. The core according to claim 1, wherein the material of the moisture-proof layer is an aluminum foil.
材の最外層付近に防湿層が設けられていることを特徴と
する写真用支持体用巻芯。4. A core for a photographic support, comprising a cylindrical core made of paper as a structural material, wherein a moisture-proof layer is provided near the outermost layer of the base material.
外層付近に防湿層が設けられている巻芯に、該巻芯の母
材の水分より多い水分を有する原紙の両面をポリオレフ
ィン樹脂で被覆した写真用支持体を捲回した写真用支持
体巻取り。5. A base material having a moisture-proof layer provided in the vicinity of the outermost layer of a base material of a cylindrical core made of paper as a structural material. Winding a photographic support coated with a polyolefin resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001094994A JP2002293481A (en) | 2001-03-29 | 2001-03-29 | Core, core for photograph support and winding of photograph support using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001094994A JP2002293481A (en) | 2001-03-29 | 2001-03-29 | Core, core for photograph support and winding of photograph support using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002293481A true JP2002293481A (en) | 2002-10-09 |
Family
ID=18949109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001094994A Pending JP2002293481A (en) | 2001-03-29 | 2001-03-29 | Core, core for photograph support and winding of photograph support using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002293481A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013003340A3 (en) * | 2011-06-29 | 2013-03-14 | Invista Technologies S.A R.L. | Tube core for humid environment |
-
2001
- 2001-03-29 JP JP2001094994A patent/JP2002293481A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013003340A3 (en) * | 2011-06-29 | 2013-03-14 | Invista Technologies S.A R.L. | Tube core for humid environment |
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