JP2004117427A - Container for recording material and cloth used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container for a recording material that does not deteriorate the recording properties of the recording material without regard to light sensitivity or light insensitivity, to provide a cloth having satisfactory adhesive strength and no adverse effect on photographic properties, and to provide a light-shielding container for a light-sensitive material such as a photographic film using a light-shielding cloth having satisfactory adhesive strength and no adverse effect on photographic properties. <P>SOLUTION: The container for a recording material uses an adhesive containing a hydrogenated tackifying resin as a tackifying resin component. The cloth has a coating of an adhesive containing a hydrogenated tackifying resin as a tackifying resin component on the reverse side of a base fabric. The light-shielding container for a light-sensitive material has a slit-shaped opening through which the light-sensitive material is inserted into and taken out of the container and to which a light-shielding cloth is bonded. <P>COPYRIGHT: (C)2004,JPO

Description

【００６１】
表１の結果から、本発明品は設備適性、品質共に従来品よりも優れていることが確認出来た。なお、ここでのＡＡは非常に優れている状態を、ＢＢは実用上問題なく使用できる状態を、ＣＣは実用限度内ではあるが問題が発生する場合があり、改善することが望ましい状態を表す。
【００６２】
（２）評価方法
（厚み）
ＰＥＡＣＯＣＫダイヤルゲージ型式Ｇを用いて測定。
（塗工品位）
由利ロール機械（株）製のＧＰＤホットメルトダイコーターを使用して、幅５００ｍｍの遮光用基布のグランド面（裏面）に３ｍ／分のスピードにて接着剤を塗工した。塗工後、塗工面の品位やピンホール量を目視にて観察した。基布１０ｍ当たりの有効塗工幅内におけるピンホール量が５個未満のものをランクＡＡとし、同じく５個以上１０個未満のものをランクＢＢとし、１０個以上のものをランクＣＣとした。
（超音波スリット適性）
振動数が１５ＫＨｚ、振幅が４０μｍの超音波スリット機を用い、加工スピード５ｍ／分でスリット加工を行った。スリット後のリボンへの樹脂カス付着状態及びその付着量を目視にて観察した。細幅遮光布片１０ｍ当たりの樹脂カス付着個数が１０個未満のものをランクＡＡとし、同じく１０個以上３０個未満のものをランクＢＢとし、３０個以上のものをランクＣＣとした。
（接着強度）
１１．５ｍｍ幅にスリット（裁断）されたリボンサンプルを、パトローネ胴板に使用する金属板の内面へ、温度１４０℃、荷重１．０８Ｎ／ｃｍ^２（１１０ｇｆ／ｃｍ^２）、圧着時間３秒の条件で貼り合わせ、２３℃で２４時間、放置した後、８０℃に設定した高温高湿槽を付属した東洋精機製ストログラフ試験器にて３００ｍｍ／分の引っ張り速度で１８０°剥離強度を測定する。
（遮光性）
サンプルを２４時間、室温で調湿を行った後、９万ルクスの光量で、ポート口方向から３０分間曝光させた後、写真フィルムを現像して、その写真画像の光もれによる光被りを目視にて観察する。
（写真特性）
接着剤と特開平９−１８９９８０号公報に記載されたハロゲン化銀乳剤Ｄ（還元増感剤として二酸化チオ尿素をハロゲン化銀１モルに対して８．０×１０^−７モル添加してもの）からなるカラー写真感光材料の乳剤塗布面とを重ね合わせ、これを遮光かつ防湿性の機能を有する積層材中に収納し、ヒートシールを行って密封した後、６０℃に調整された高温高湿槽内で３日間放置した。放置後、積層材内より取り出した写真感光材料を白色でウェッジ露光して、標準現像し、現像後の写真感光材料の被り濃度（未露光部濃度）とフィルム濃度測定機にて測定した。この被りの濃度と、評価用サンプルと重ね合わせないで写真感光材料のみを、上記と同様の条件で放置、露光、現像して得た被りの濃度（未露光部濃度）との差（△ＦＯＧ）を算出した。△ＦＯＧが小さい程、画像障害の可能性が少なく、良好である。なお、表１に示した△ＦＯＧは、カラー写真感光材料の最上面の乳剤層（青感層）の値である。
【００６３】
【発明の効果】
本発明によれば、安価でかつ十分な接着強度、超音波スリット適性、塗工適性、遮光性を満足する接着剤塗設した遮光用布片及びこれを用いた写真フィルム等感光材料用遮光容器を提供することができた。また、還元増感処理されたハロゲン化銀乳剤を有する感光材料の写真特性を劣化させることのない遮光布片及びこれを用いた写真フィルム等感光材料用遮光容器が得られた。
【図面の簡単な説明】
【図１】本発明の長尺遮光テレンプ連結体を用いて、左右両端部に遮光テレンプを貼り付けた胴体部形成用金属板の一例の正面図である。
【図２】本発明の長尺遮光テレンプの幅をともに８．８〜９．７ｍｍにした場合に好ましく用いる、段差部を設けた胴体部形成用金属板の一例の斜視図である。
【図３】図１に示した遮光テレンプ付き胴体部形成用金属板を用いた写真フィルムカートリッジの一例の断面図である。
【符号の説明】
１　胴体部形成用金属板
７　ポート部
７ａ、７ｂ　ポート部形成部
８　筒部形成部
９ａ、９ｂ　筒部形成部の凸部
１０ａ、１０ｂ　遮光テレンプ
１１　スプール軸
１２　写真フィルム
Ａ　胴体部形成用金属板の幅方向の長さ
Ｂ　胴体部形成用金属板の縦方向の長さ
Ｃ、Ｄ　ポート部形成部の縦方向の長さ
Ｅ、Ｆ　ポート部形成部の幅方向の長さ
Ｇ、Ｈ　ポート部形成部の端部から筒部形成部の凸部の端部までの幅方向の長さ
Ｉ、Ｊ　ポート部形成部の端部から筒部形成部の凸部の端部までの縦方向の長さ
Ｋ　段差（誘い）部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container for storing non-photosensitive recording material such as thermal transfer image receiving paper in addition to photosensitive material such as photographic paper, photosensitive material for printing, color negative film for photography and the like.
The present invention also relates to a cloth piece, preferably a light shielding cloth piece, which is provided in a slit-like opening for storing a recording material, in particular, a photosensitive material in such a container, and taking it in and out.
[0002]
[Prior art]
A 35 mm roll film for photography is used in a state of being housed in a light shielding container called a cartridge (also referred to as “cartridge”). As is well known, this cartridge basically comprises a cylindrical iron barrel, a spool as a core for winding the film in a roll, and two caps that close both ends of the barrel. Is done. And the cloth piece for light-shielding also called a telemp is normally stuck to the film entrance / exit inner surface of the said trunk | drum.
This light shielding cloth piece is made of a flexible material having a pile on the surface of the base fabric in order to prevent the unused film from being exposed to light, and to smoothly pull out and rewind the film. A shading piece is used.
[0003]
Conventionally, as this kind of light shielding cloth piece, two woven fabrics or knitted fabrics are connected by weaving or knitting with pile yarns to form two woven fabrics or knitted fabrics, and then two woven fabrics or knitted fabrics. Is manufactured by cutting the pile yarn in the vicinity of the center along the cloth surface (see, for example, Patent Documents 1 to 11). These so-called teremps shield light when the pile yarn comes into contact with the photographic film, and the flexibility and the drawing resistance of the photographic film can sufficiently withstand normal use.
[0004]
The telemp is designed to block light entering from the slit-like opening of the light-shielding container, that is, the port opening, but it is also an important function that it does not adversely affect photographic properties. The adverse effects on photographic properties include coverings, density abnormalities, sensitivity abnormalities, gradation abnormalities, color abnormalities, density irregularities, etc. that occur in photographic film. These factors include physical factors attributable to packaging materials and packaging materials. It is roughly divided into chemical factors such as chemical reaction between photographic harmful substances and photographic film.
As a physical factor, for example, when a foreign matter adheres to the telemp, extra pressure is applied to the photographic film, which causes pressure covering and film scratches. In addition, if there is a large difference in the charge train between the material of the telemp and the base for the photographic film, the telemp is charged when the photographic film is pulled out of the cartridge, particularly under low humidity, and static marks (dendritic or blurred circular fog) are generated by static electricity. Will occur. As a chemical factor, for example, there is a chemical reaction between a harmful gas such as an aldehyde compound, a ketone, a sulfur compound, and a cyanide compound generated by thermal decomposition of a thermoplastic resin and a photographic film. Sensitivity degradation, sensitivity abnormality, etc. occur. In addition, since an aldehyde compound is harmful also to a human body, it is preferable to suppress generation | occurrence | production as much as possible.
[0005]
As raw materials of conventional hot melt adhesives for telem, tackifying resins such as rosin and rosin derivatives, terpene resins and petroleum resins have been used (for example, see Non-Patent Document 1 or 2). However, especially in the summer, such as when using photographic film, for example, when a camera loaded with film is left in a hot or humid room or in a car, the density, sensitivity, Problems such as tone abnormalities, coloring abnormalities, or density unevenness may occur.
[0006]
Furthermore, with the conventional adhesive for telem, sufficient adhesive strength of telem to the cartridge body plate cannot be ensured, and peeling occurs when the lid member or bottom member of the photographic film cartridge is fitted on the top and bottom of the cylindrical part forming part, Light leaks from the peeled gap, which may cause a problem of light incident. Also, depending on the usage environment of the photographic film, if the telemp is peeled off from the patrone copper plate, or if the camera with the photographic film loaded is left in the car, especially in summer, the camera and the teremp adhesive application part Caused adhesion, contaminating the camera, and making it impossible to remove the photographic film.
[0007]
[Patent Document 1] Japanese Utility Model Publication No. 37-21388
[Patent Document 2] Japanese Utility Model Publication No. 46-20539
[Patent Document 3] JP-A-60-208751
[Patent Document 4] Japanese Utility Model Publication No. 61-34526
[Patent Document 5] Japanese Patent Laid-Open No. 62-98347
[Patent Document 6] Japanese Utility Model Publication No. 62-51341
[Patent Document 7] Japanese Utility Model Publication No. 62-167249
[Patent Document 8] Japanese Utility Model Laid-Open No. 4-18844
[Patent Document 9] Japanese Utility Model Publication No. 4-18846
[Patent Document 10] Japanese Utility Model Laid-Open No. 4-28641
[Patent Document 11] JP-A-4-73642
[Non-Patent Document 1] Hiroshi Fukada, "Actual Hot-melt Adhesion", 5th edition, published by Kobunshi Shuppankai, May 20, 1979
[Non-Patent Document 2] "Practical technology of hot-melt adhesive", first edition of popular edition, CMC Co., Ltd., first edition first edition issued on August 30, 1991
[0008]
[Problems to be solved by the invention]
The present invention has been made to solve the above problems, and a first object of the present invention is to provide a recording material container that does not deteriorate the recording characteristics of the recording material regardless of whether it is photosensitive or non-photosensitive. That is. The second object is to provide a piece of cloth that has sufficient adhesive strength and does not adversely affect photographic properties. A third object of the present invention is to provide a light-shielding container for a photosensitive material such as a photographic film using a light-shielding cloth piece that has sufficient adhesive strength and does not adversely affect photographic characteristics.
[0009]
[Means for Solving the Problems]
The above-described problems have been solved by the following recording material container, a cloth piece used therefor, and a light-shielding container for photosensitive material.
1) A container for recording material, wherein an adhesive containing a hydrogenated tackifying resin as a tackifying resin component is used;
2) A non-light-shielding cloth piece or a light-shielding cloth piece, characterized in that an adhesive containing a hydrogenated tackifying resin as a tackifying resin component is coated on the back of the base fabric tissue,
3) The recording material container according to 1), wherein the hydrogenated tackifying resin is an alicyclic hydrogenated petroleum resin,
4) The non-light-shielding cloth piece or the light-shielding cloth piece according to 2), wherein the hydrogenated tackifying resin is an alicyclic hydrogenated petroleum resin,
5) A light-shielding container for photosensitive material having a slit-shaped opening for taking in and out the photosensitive material, wherein the light-shielding cloth piece for light shielding described in 2) or 4) is adhered to the opening.
[0010]
Preferred embodiments of the container for recording material described in 1) or 3) are listed below.
6) The non-light-shielding cloth piece or the light-shielding cloth piece according to 1) or 3), wherein the adhesive is a hot-melt adhesive;
7) The recording material container according to 1), 3), or 6), wherein the recording material is a heat-developable photosensitive material image paper that is a transfer type image receiving paper, or an inkjet image receiving paper.
8) A container for recording material according to 1), 3), 6) or 7) for storing a long recording material roll,
9) The recording material container according to any one of 1), 3), and 6) to 8), wherein the hydrogenation rate of the hydrogenated tackifying resin is 80% or more.
[0011]
Preferred embodiments of the non-light-shielding cloth piece or the light-shielding cloth piece described in 2) or 4) are listed below.
10) The non-light-shielding cloth piece or the light-shielding cloth piece according to 2) or 4), wherein the adhesive is a hot-melt adhesive;
11) The non-light-shielding cloth piece or the light-shielding cloth piece according to 2), 4) or 10), wherein the hydrogenation rate of the hydrogenated tackifying resin is 80% or more.
12) The light shielding cloth piece according to 2), 4), 10) or 11), wherein the base fabric structure is a woven structure or a knitted structure;
13) The non-light-shielding cloth piece or the light-shielding cloth piece according to any one of 2), 4), 10) to 12), which is a knitted structure formed of a cord yarn and an insertion yarn.
[0012]
Preferred embodiments of the light-shielding container for light-sensitive material described in 5) are listed below.
14) The light-shielding container for photosensitive material according to 5), wherein the adhesive is a hot melt adhesive,
15) The light-shielding container for photosensitive material according to 5) or 14), wherein the hydrogenation rate of the hydrogenated tackifying resin is 80% or more,
16) A light-shielding container for photosensitive material according to 5), 14) or 15), which is a 135 type film cartridge,
17) A light-shielding container for a light-sensitive material according to any one of 5) and 14) to 16), which contains a photographic film using a silver halide emulsion subjected to reduction sensitization.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The adhesive used for the recording material container or cloth piece (non-light-shielding cloth piece or light-shielding cloth piece) of the present invention includes a solution type, an aqueous solution type, an emulsion type, a hot melt type, a pressure sensitive type, and a solventless paste type. There are various adhesives such as monomer type and oligomer type. In the present invention, a hot-melt adhesive is a 100% solid adhesive that does not use a solvent, is free from dangers such as occupational safety and health and fire, and is capable of high-speed bonding. Is preferably used.
[0014]
Hereinafter, the hot melt adhesive preferably used as the adhesive in the present invention will be mainly described.
In general, a hot melt adhesive contains two components, a base polymer and a tackifying resin, as essential components, and a wax, an antioxidant, a plasticizer, a filler, and the like are blended as necessary. Examples of the base polymer include ethylene-vinyl acetate copolymer (EVA), atactic polypropylene (APP), polyamide, thermoplastic polyester, block polymer (SIS, SBS, SEBS), etc. It is preferable to use EVA.
[0015]
The tackifying resin, which is another essential component of the hot melt adhesive, is an amorphous oligomer having a molecular weight of usually several hundred to several thousand, and imparts fluidity, tack, etc. by blending with a polymer. It improves the adhesive strength. More specifically, the tackifier resin is (1) imparts wet or hot tack at the time of melt coating, improves adhesion to the adherend surface, and (2) controls the melt viscosity of the blended composition, It has characteristics such as improving workability. The desired physical properties can be easily obtained by selecting the tackifying resin and applying the blending ratio. That is, the heat resistance and open time of the blend can be adjusted.
[0016]
Tackifying resins can be broadly classified into natural resin systems and synthetic resin systems.
Natural resins include rosin, rosin derivatives (hydrogenation, disproportionation, polymerization, esterification), terpene resins (α-pinene, β-pinene), terpene phenol resins, aromatic modified terpene resins, There are terpene-based tackifying resins such as hydrogenated terpene resins.
Further, examples of the synthetic resin system include tackifier resins such as petroleum resins, alkylphenol resins, xylene resins, and coumarone indene resins. Further, petroleum resins include aliphatic petroleum resins, aromatic petroleum resins, copolymerized petroleum resins, and alicyclic hydrogenated petroleum resins.
[0017]
The adhesive used in the present invention includes a hydrogenated tackifier resin as a tackifier resin. By hydrogenating the tackifying resin, that is, adding hydrogen to the double bond portion of the tackifying resin, heat resistance, weather resistance, and compatibility with various elastomers are improved. In particular, in the case of a hot melt type adhesive, since it is used after being heated and melted, the stability to heat becomes a problem, but the hydrogenated tackifier resin is stable to heat, so it suppresses heat deterioration. Is possible.
The hydrogenation rate of the hydrogenated tackifier resin in the present invention is preferably 70% or more, more preferably 80% or more, and particularly preferably a value close to a saturation state of 95% or more. As long as the hydrogenated tackifier resin is a hydrogenated resin, the above-mentioned natural resin system or petroleum resin system may be used.
Moreover, it is needless to say that the adhesive used in the present invention may contain, as an optional component, a tackifying resin that is not hydrogenated as a tackifying resin.
[0018]
Specific examples of the natural resin-based hydrogenated tackifier resin include hydrogenated rosin and hydrogenated terpene. Such natural resin-based hydrogenated tackifier resins are commercially available, such as Foral 105 (Rika Hercules Co., Ltd.) as a hydrogenated rosin and Clearlon P-125 (Yasuhara Chemical Co., Ltd.) as a hydrogenated terpene. is there.
[0019]
Petroleum resin-based hydrogenated tackifier resin is C ₅ Aliphatic hydrogenated petroleum resin derived from fractions and C ₉ It is roughly divided into alicyclic hydrogenated petroleum resins derived from fractions. In the present invention, it is preferable to use an alicyclic hydrogenated petroleum resin from the viewpoint of cost and adhesive strength (particularly polarity).
[0020]
This alicyclic hydrogenated petroleum resin is a hydrogenated aromatic petroleum resin. ₉ A nuclear hydrogenated product of an aromatic petroleum resin obtained by cationically polymerizing a fraction with a catalyst such as aluminum chloride. C ₉ As the fraction, α-styrene, β-methylstyrene, vinyltoluene, indene and the like are representative, and an alicyclic system is obtained by hydrogenating an aromatic petroleum resin obtained by cation copolymerization of 70% or more. Hydrogenated petroleum resin is obtained. The hydrogenation rate of the alicyclic hydrogenated petroleum resin of the present invention is preferably 80% or more, and particularly preferably a value close to a saturation state of 95% or more.
In the present invention, the alicyclic hydrogenated petroleum resin can be preferably used because the double bond portion that adversely affects photographic properties disappears and is changed to a stable compound that does not affect photographic properties.
[0021]
The property of the hot melt adhesive used in the present invention is preferably a 100% solid content type that exhibits fluidity when heated in a solid state at room temperature. This 100% solids type hot melt adhesive preferably has a melt viscosity when heated at 200 ° C. in the range of 50,000 to 300,000 mPa · s. A more preferable range of fluidity is 100,000 to 200,000 mPa · s.
As a preferable composition of the hot melt adhesive for providing fluidity in such a range, an ethylene vinyl acetate copolymer as a base polymer, a tackifying resin, and other additives are used.
A preferred example of the ethylene vinyl acetate copolymer is an ethylene vinyl acetate copolymer resin having a vinyl acetate content of 10 to 30%, a melt flow index (MFR) of 1 to 20 g / 10 minutes, and a bigat softening temperature of 40 to 75 ° C. For example, Evaflex 360 (Mitsui DuPont Polychemical Co., Ltd.) can be used as a base.
[0022]
Tackifying resins include aromatic petroleum resins, especially C ₉ It is preferable to use an aromatic petroleum resin as a component in combination with an alicyclic hydrogenated petroleum resin. The ratio of the alicyclic hydrogenated petroleum resin to the total of the aromatic petroleum resin and the alicyclic hydrogenated petroleum resin is 10 to 90% by mass, preferably 30 to 70% by mass, and particularly preferably 40%. -60 mass%. Examples of this combination composition are given below.
・ Aromatic petroleum resins having a softening point (JIS K-2531 ring and ball method) of 120 to 140 ° C., such as Nisseki Neopolymer 140 [Nippon Petrochemical Co., Ltd.], and alicyclics having a softening point of 120 to 140 ° C. System hydrogenated petroleum resin, for example, Imabe P-140 [Idemitsu Petrochemical Co., Ltd.] is used in combination.
It is preferable to add these two kinds of tackifying resins, and further, as additives, inorganic fine particles such as talc, and polyethylene wax having a softening point of 90 to 110 ° C. and a small molecular weight distribution.
[0023]
The composition of a preferred embodiment of the hot melt adhesive used in the present invention is as follows: base polymer (ethylene vinyl acetate copolymer resin, etc.): 30 to 65% by mass, the above-mentioned tackifier resin: 25 to 50% by mass, inorganic fine particles : 0 to 20% by mass, wax: 0 to 20% by mass. More preferable composition of the hot-melt adhesive is an ethylene vinyl acetate copolymer resin having a vinyl acetate content of 20 to 30%, an MFR of 2 to 5 g / 10 minutes, and a bigat softening temperature of 40 to 75 ° C .: 40 to 50% by mass, The above-mentioned tackifying resin: 25-35% by mass, inorganic fine particles: 5-15% by mass, wax: 10-20% by mass.
[0024]
The container for a recording material using an adhesive containing a hydrogenated tackifying resin of the present invention, preferably an alicyclic hydrogenated petroleum resin as a tackifying resin component, in addition to a photosensitive silver halide photographic photosensitive material, It can be used for a container for storing a non-photosensitive recording material such as an image receiving paper for heat developing material used together with the heat developing photographic light-sensitive material. The embodiment includes a hot melt adhesive that bonds a body portion and a pair of end caps that close both ends of the magazine for storing a long roll-shaped recording material, and is attached to a slit-shaped opening of the magazine. Hot melt adhesive for fixing the cloth piece to be fixed to the upper lip of the slit portion, or hot melt adhesive for fixing the light shielding cloth piece to the slit-like opening provided in the container of the photosensitive recording material.
[0025]
Hereinafter, the cloth pieces used in the present invention, particularly the light shielding cloth pieces, will be described in detail.
The light shielding cloth piece of the present invention has a portion of a base fabric structure (also referred to as a “base fabric portion”) and a pile portion (also referred to as a “pile portion”) made of a pile knitted therein. The portion is constituted by a pile made of napped multifilaments having a dense and uniform length. Typical examples of the base fabric structure of the teremp of the present invention include a woven structure composed of warps and wefts, a knitted structure formed of comb threads and insertion yarns, and a raised woven fabric and a raised knitted fabric. The above-mentioned woven structure or knitted structure is preferable, and the knitted structure is most preferable. In addition, as for the material of the telemp, it is common to use synthetic fibers such as polyester and nylon and regenerated fibers such as rayon, but when considering the charged train with the base film used for photographic film, From the viewpoint of cost, it is preferable to use polyester as the material for the telemp.
[0026]
A sealant may be applied to the base fabric portion side of the teremp of the present invention, that is, the back surface of the base fabric structure. The sealant has an effect of preventing the adhesive from penetrating from the back surface (coating surface) to the surface particularly when the viscosity of the adhesive is low.
[0027]
Examples of the sealing agent include polyvinyl resins such as those described in JP-A-62-55699, JP-A-62-71949, JP-A-62-27733, and JP-A-2-72348. , Polyolefins, polyurethanes, polyamides, polyesters, synthetic rubbers, epoxies, phenols, one or two or more blends selected from synthetic emulsions not included in these, or combinations thereof A copolymer emulsion is mentioned. In addition, when it is possible to adjust the degree of penetration into the light-shielding cloth piece with only the adhesive without using the sealant, apply the sealant as disclosed in Japanese Patent Publication No. 5-88455. It is not necessary to work, and this is preferable from the viewpoints of cost, simplified equipment, and the like.
[0028]
In the hot melt adhesive composition according to the present invention, carbon black, for example, Mitsubishi Carbon Black # 44 [Mitsubishi Chemical Co., Ltd.] 0.3 to 0.3 is added to the hot melt adhesive in order to impart light shielding properties against the transmission of the base fabric. It is necessary to add 1.0% by mass and sufficiently knead to disperse the carbon black. When the amount of carbon black added is less than 0.3% by mass, the film patrone, which is the final product, has insufficient light-shielding properties against the light transmitted through the telem when it becomes a telem, and the photographic performance becomes unstable. Problems such as film fogging occur.
In particular, regarding the photographic performance, it is considered that the adsorption characteristics of carbon black described in “Carbon Black Handbook” (published by Carbon Black Association) published by Book Publishing Co., Ltd. are significant. Moreover, when it exceeds 1.0 mass%, not only will adhesive strength fall, but a viscosity will raise or it will become easy to raise | generate a secondary aggregation of carbon black, and the malfunction on coating suitability will arise.
[0029]
In addition, it is preferable to add an antioxidant in order to prevent thermal deterioration when the hot melt adhesive is applied. Antioxidants are usually oxidized as described in “Practical Plastics Encyclopedia” published by Sangyo Kenkyukai Encyclopedia Publishing Center and “Guideline for Plastic Films and Resin Materials '91” (first volume) published by Processing Technology Research Group. An inhibitor can be used. Antioxidants can be classified into phenolic, thioether, and phosphorus types, based on their structures, with phenolic being the most basic. However, the antioxidant may affect the performance of the photographic film, and the use of the antioxidant needs to be fully examined including the amount of addition.
[0030]
In the hot-melt adhesive composition according to the present invention, it is preferable that the MFR of the ethylene vinyl acetate copolymer resin is 1 to 20 g / 10 min and the bigat softening point is 40 to 75 ° C. If the MFR is greater than 20 g / 10 min or the bigat softening point is less than 40 ° C., the cohesive strength of the adhesive is insufficient, and sufficient heat-resistant adhesive strength cannot be obtained, and no sealant layer is applied. In such a case, there is a concern that the amount of penetration of the adhesive increases and the adhesive oozes out to the pile side of the telemp. On the other hand, if the MFR is less than 1 g / 10 min and the bigat softening point is higher than 75 ° C., the resin extrusion motor of the apparatus to be coated becomes unreasonable, and the apparatus is likely to break down, making extrusion coating difficult. Moreover, about the mixture ratio of ethylene vinyl acetate copolymer resin, 30-65 mass% is preferable. If it is less than 30% by mass, adhesive strength at low temperature cannot be obtained, and if it exceeds 65% by mass, the fluidity is lowered, and the coating property is uniform and stable on the light shielding base fabric (the base fabric part of the light shielding fabric piece). Cannot be obtained. The tackifying resin preferably has a softening point of 120 to 140 ° C. If it is less than 120 ° C., the heat resistance of the adhesive cannot be obtained. When the temperature is 140 ° C. or higher, the fluidity of the adhesive deteriorates, and uniform and stable coatability to the light shielding base fabric cannot be obtained. Moreover, in a composition ratio, it is preferable that tackifying resin exists in the range of 25-50 mass%. If it exceeds 50% by mass, the adhesive becomes too sticky, and adhesive adhesion occurs in each part of the line that receives the thermal history of the telem manufacturing process, which may cause a failure in the production line. Even in a state where the telem is finally formed, there is a risk of adhesion of resin residue. When the tackifying resin is less than 25% by mass, the target adhesive force tends to be not obtained. A more preferable tackifying resin content is 25 to 35% by mass.
The composition ratio of the wax is preferably 0 to 20% by mass. If it exceeds 20% by mass, the cohesive force of the adhesive is lowered, the target adhesive force cannot be obtained, and the viscosity is further lowered, so that a problem occurs in the soaked state. When the composition ratio of the wax is 10% by mass or more, the open time of the adhesive can be shortened and the possibility of blocking in the telempe production process is reduced. Therefore, the more preferable composition ratio of the wax is 10 to 20% by mass. .
Furthermore, the content of inorganic fine particles is preferably 0 to 20% by mass. If it exceeds 20% by mass, the fluidity of the adhesive deteriorates, and uniform and stable coatability to the light shielding base fabric cannot be obtained, and the target adhesive strength cannot be obtained. If the content of the inorganic fine particles is less than 5% by mass, sufficient adhesive cohesive force may not be obtained. Therefore, the more preferable content of the inorganic fine particles is 5 to 15% by mass. It goes without saying that the raw materials used for these hot melt adhesives are not allowed to contain components that change the performance of the recording material, in particular, the performance (sensitivity, density, etc.) of the photographic photosensitive material.
[0031]
Hot melt adhesives related to the present invention are described in “Actual Knowledge of Adhesives” written by Toyo Keizai Shinposha and “New Polymer Bunko 16 Actual Conditions of Hot Melt Adhesives” published by Polymer Publishing Association. Manufactured by the same manufacturing method. However, as in the case of the hot melt adhesive according to the present invention, when the viscosity is relatively high, there is a problem in the process of cutting into a pellet by simply dropping and cooling and solidifying the endless steel belt in a linear or pipette form. Therefore, it is preferable to perform cutting after solidifying in a bath soaked with cooling water instead of the steel belt.
[0032]
In addition, when carbon black is blended as in the hot melt adhesive according to the present invention, it may be kneaded directly into the resin with a roll, a Banbury mixer, an extruder, etc., but it is usually kneaded with a small amount of plasticizer beforehand with an ink roll. A paste-like toner, or a master batch color pellet kneaded with a small amount of resin with a roll or an extruder, or a powder master batch (resin color) that is uniformly sprinkled on a small amount of resin powder using a high-speed mixer )make.
[0033]
Next, it is preferable to mix and dilute this with a large amount of resin in a processing step so as to match a predetermined colorant blending amount. It is also useful to make good use of the masterbatch method as described above, since it is generally difficult to disperse as the fine color black has a fine particle size. Furthermore, when carbon black and filler are blended in the same manner as in the hot melt adhesive according to the present invention, the difference in specific gravity of the raw materials is large and uniform dispersion is extremely difficult, so when mixing with a uniaxial or biaxial screw extrusion kneader. In many cases, the resin after one pass has a variation in physical properties within the same production, and it is preferable that the resin obtained after one pass is charged again into the mixing kettle and passed through two passes. Further, from the viewpoint of preventing oxidative deterioration, it is preferable to defoam (depressurize) the inside of the extruder or to purge the inside of the extruder with nitrogen. In view of preventing thermal degradation, it is preferable to set the melting temperature of the raw material to 200 ° C. or lower.
[0034]
As for carbon black related to the present invention, general carbon black as described in “Handbook of Carbon Black (Edited by Carbon Black Association)” published by Book Publishing Co., Ltd. can be used. It is particularly preferable to use oil furnace black.
[0035]
In addition, since the hot-melt adhesive having a solvent-free 100% solid content is solid at room temperature and generally has a high viscosity and poor fluidity, the hot-melt adhesive is used on the back surface (ground surface) of the light shielding cloth piece. As the coating method, it is preferable to apply the extrusion coating method as described in “Coating method (written by Yuji Harasaki)” published by Tsuji Shoten. As a method for supplying the hot melt adhesive in the coating apparatus, there is a method in which the hot melt adhesive is melted by a heating cylinder and supplied by a screw method. Adhesive is applied directly to the back surface of the telemp substrate using these extrusion die coater coating devices.
[0036]
In addition, the nozzle method, roll method, blade method and “New Polymer Bunko 16 Hot” published by Nikkan Kogyo Shimbun, published in “Adhesion Handbook 2nd Edition (Japan Adhesion Association)”, and published by Polymer Publishing Association. Coating can also be performed using various coating apparatuses as described in “Actuality of Melt Adhesive”.
[0037]
In addition, the screw method described above is preferable in terms of suppressing oxidation deterioration and thermal deterioration as much as possible. Further, it is more preferable to install a nitrogen purge device, for example, a separation membrane type nitrogen gas generator manufactured by Air Water Co., Ltd. in the hopper portion. If foreign matter enters, there is a risk of coating surface abnormalities. From the viewpoint of preventing foreign matter contamination, a filter is installed on the exit side of the extruder or in front of the die, or vibration foreign matter is removed before the resin is put into the hopper. From the viewpoint of coating stability, it is preferable to use an apparatus or remove foreign substances with a high magnetic force magnet type foreign substance removing apparatus. In the case of the extrusion coating method, from the viewpoint of preventing thermal deterioration and oxidation deterioration of the resin, it is preferable not to make a resin retaining portion in each of the extruder and the die, or the heat hose connecting the extruder and the die. . In particular, when there is a staying portion in the die, the flow of the resin is changed by installing a baffle plate, or a part such as a gear is connected to, for example, Diamond BLACK, Inc. The company's boron carbide ceramic coating is preferably applied.
[0038]
The adhesive region in the case where the hot melt adhesive according to the present invention is applied to the ground surface (back surface) of the telemp base is formed by at least one layer of the hot melt adhesive. The adhesive region may be striped or sea-island, but the adhesive layer preferably forms a uniform and continuous region, and particularly preferably forms a continuous adhesive layer.
[0039]
The temperature of the hot-melt adhesive when the hot-melt adhesive relating to the present invention is applied to the ground surface of the telemp base material by the above-described coating machine causes thermal denaturation in the case of the light-shielding telemp made of synthetic fibers. No temperature is preferred. The synthetic fiber here is composed of a resin having thermoplasticity such as polyester such as polyethylene terephthalate or polyamide such as nylon. For example, when the telemp material is a synthetic fiber such as polyethylene terephthalate or 66 nylon, the temperature is preferably 200 ° C. or lower, more preferably 150 to 180 ° C. The viscosity of the hot melt adhesive at the time of application needs to be adjusted depending on the physical properties of the hot melt resin and the application temperature, but is preferably 100,000 to 700,000 mPa · s, more preferably 400,000 to 600,000 mPa · s. s. If the hot melt adhesive is applied directly to the ground surface of the telemp base material without using the sealant layer at 100,000 mPa · s or less, there is a problem that the adhesive oozes out to the pile side. If it exceeds 000 mPa · s, the penetration and adhesion of the resin to the fiber structure will be poor, and there will be a problem that the fluff comes off more frequently when cutting on the telemp production line, and furthermore, smooth and uniform application becomes very difficult.
[0040]
Moreover, it is preferable to set the clearance between the coating head and the backup roll in the range of 0.3 mm or more and 1.5 mm or less as an apparatus condition during coating. When the clearance is narrower than 0.3 mm, the pile yarn is strongly compressed, so that problems such as pile crushing and poor running performance of the base fabric occur. On the other hand, when the thickness is larger than 1.5 mm, the adhesive is not transferred to the base fabric, and there is a risk of causing an abnormality in the coated surface such as scum. Application amount of adhesive is 60 to 120 g / m ² The coating amount is 60 g / m ² If it is less, the unevenness of the back surface of the telemp base material cannot be smoothed, and as a result, the target adhesive strength cannot be obtained, and there is a possibility that the light transmitted through the telemp base material cannot be absorbed. To increase the amount of carbon black to be added, increasing the amount of carbon black to be added, as described above, not only decreases the adhesive force, but also increases the viscosity and tends to cause thermal degradation. Problems with coating suitability occur. Application amount is 120 g / m ² If it is more, there is a problem that the amount of resin residue adhering to the ribbon is increased in the slitting process for manufacturing the telemp ribbon. Further, for example, a plurality of thin plates such as those disclosed in JP-A-59-143842, JP-A-63-74869, JP-B-5-53256, and JP-A-7-301888 are attached to the front end and the rear. In a facility where two long telemps coated with adhesive are continuously adhered to the left and right ends of the thin plates arranged in series, in a state where the ends are in close contact with each other, There is a problem in appearance such that the hot melt adhesive is transferred to the cartridge body plate during thermocompression bonding to the plate.
[0041]
The light shielding base fabric suitable for applying the hot melt adhesive according to the present invention has a pile density range of 45,000 to 85,000 pieces / cm on the pile side. ² And the pile compression property is 0.49 N / cm when the pile yarn has a thickness of 1.6 mm or less. ² 15-25% thickness displacement rate under load of 1.96 N / cm ² What shows the thickness displacement rate of 26 to 45% at the time of the load of is preferable. The thickness displacement rate here refers to the ratio of the thickness reduced by the load from the original thickness. This characteristic is achieved by combining the thickness of the pile yarn, the cross-sectional shape of the yarn, the type of the yarn, and the processing type of the yarn. By giving the pile yarn such a pile density and compression characteristics, the pile yarn will not be crushed even if it is subjected to pressure to push the adhesive into the ground surface during application of the adhesive. Good quality light-shielding telemp with good pull-out resistance. For example, a polyester density yarn of 84 dtex / 72 filaments with a single yarn fineness of 1.16 dtex is a pile density of 50,000-60,000 pieces / cm ² When used as the above, it is possible to obtain good pile characteristics as described above. In the case of using a polyester processed yarn of 84 dtex / 36 filaments with a single yarn fineness of 2.31 dtex for the same processed yarn, 1.96 N / cm ² The thickness displacement rate becomes smaller than 26% at the time of loading, and pile crushing does not occur at the time of coating. However, when the film cartridge is used, the drawing resistance is increased, so that the single yarn fineness is preferably low.
[0042]
The thickness of the telemp needs to be set according to the upper and lower gap width of the slit-like opening of the cartridge main body to be attached, and is preferably set within a range of 0.05 to 0.3 mm which is a value obtained by halving the gap width. If the thickness is less than 0.05 mm, the light shielding property may be greatly reduced. If the thickness is more than 0.3 mm, the drawing resistance may be increased, which is not preferable. The ground surface is preferably a woven fabric or warp knitting structure that is smooth and has good adhesive coating properties. When the ground structure is a warp knitting structure, the present applicant has developed a Kusari-Sonyu structure devised in Japanese Utility Model 7-50741. A structure or a comb-satin structure is preferable, and by using such a structure, the unevenness of the ground surface is reduced, the coating property is good, and the desired adhesive strength can be obtained with a small amount of applied adhesive. Further, in the case of a combed and thinned structure, a multifilament yarn of 56 to 110 dtex is preferable as the thickness of the yarn to be used, and several types of filament yarns having different single yarn fineness may be used in combination. In order to give the anchoring effect between the adhesive and the fiber, 45 or less is preferable. When the thickness of the yarn is larger than 110 dtex, there is a problem that the slit property is deteriorated in the slit process for manufacturing the telemp ribbon, and when the yarn is thinner than 56 dtex, the ground structure is weakened, and the rigidity when it is used as the telemp is lowered. Therefore, there is a possibility that stable adhesion to the position set at the time of sticking to the cartridge body cannot be performed. It is preferable that the material of the pile yarn and the ground yarn used in the warp knitting structure and the woven teremp is composed of a single synthetic fiber, but two or more kinds of synthetic fibers may be used in combination. .
[0043]
In the cloth for shading used in the present invention, the fiber is black as described in Japanese Utility Model Publication No. 62-51341 and Japanese Utility Model Publication No. 4-33040 in order to prevent static when pulling out a photographic film and to secure a light shielding function. In addition, it preferably contains an antistatic material and a conductive material. As the coloring method, raw fabric dyeing (post-dyeing) or black original yarn may be used. Black original yarn is made by kneading carbon black into the original yarn and coloring the fiber in black, but it is described in "Coloring for plastics" (published by Yutaka Hanada and Jun Yahagi) published by Nikkan Kogyo Shimbun. As described above, since carbon black provides good light absorption over a wide range of ultraviolet rays, visible rays, and infrared rays, it can be applied to photosensitive materials having spectral absorption at various wavelengths.
[0044]
The light shielding cloth piece used in the present invention may be cut (slit) into the use width after being manufactured with a wide width (500 mm or more), or may be manufactured with the use width from the beginning. As a method of slitting a wide product so as not to come off the pile, heat melting cutting with a heat blade described in Japanese Utility Model Publication No. 48-35790 or cutting with an ultrasonic cutter, laser cutter, heat cutter, etc. as other means There is a way.
[0045]
FIG. 1 is a front view of an example of a body part-forming metal plate in which light-shielding telems are attached to both left and right ends using the long light-shielding telemp of the present invention. The body part forming metal plate 1 is composed of port part forming parts 7a and 7b and a cylinder part forming part 8, and a convex part 9a fitted on the lid member or bottom surface member of the photographic film cartridge above and below the cylinder part forming part, 9b is provided. The body part forming metal plate 1 shown in FIG. 3 has a length A in the width direction of 79.75 to 79.85 mm, a length B in the vertical direction of 42.15 to 42.25 mm, and a port part forming part. The length D in the vertical direction 7a and the length C in the vertical direction C of the port portion forming portion 7b are 35.8 to 36.0 mm, and the length F in the width direction of the port portion forming portion 7a is 7.1. 7.3 mm, the length E in the width direction of the port portion forming portion 7b is 3.4 to 3.6 mm, and the width direction from the end of the port portion forming portion 7a to the end of the convex portion 9a of the tube forming portion Length H is 21.15 to 21.40 mm, and the length G in the width direction from the end of the port portion forming portion 7b to the end of the convex portion 9a of the tubular portion forming portion is 17.3 to 17.5 mm. The length I in the vertical direction from the end of the convex part 9a of the cylindrical part forming part to the end of the port part forming part 7a is 3.1 to 3.2 mm, and the convex part of the cylindrical part forming part Longitudinal length J of a is 0.5-0.6 mm. Further, in order to make it easy to fit the lid member or bottom surface member of the photographic film cartridge and to prevent the light shielding telemp 10a from being peeled when fitted, a step (invitation) K is set to 0.4 to 0. 0, respectively. It is provided at a level of 6 mm.
[0046]
Both the light shielding telemps 10a and 10b shown in FIG. 1 are formed by connecting a long light shielding telemp joined to a body portion forming metal plate, and both end portions in the length direction protrude from the cylindrical portion forming portion 8 by 1 to 2 mm. It is affixed by cutting at the position to be. The light shielding telemp 10a may have a width of 11.3 to 11.7 mm or may be as short as 8.8 to 9.7 mm, and its end portion is 1.0 to 2.5 mm in the width direction from the port portion forming portion 7a. Affixed to the protruding position. The light shielding telemp 10b has a width of 9.3 to 9.7 mm and is attached to a position protruding 1.0 to 2.5 mm in the width direction from the port portion forming portion 7b.
[0047]
FIG. 3 is a cross-sectional view of an example of a photographic film cartridge using the telescopic body part forming metal plate shown in FIG. In the film case of the photographic film cartridge, the light shielding telemps 10a and 10b attached to the port portion forming portions 7a and 7b are in contact with the cylindrical portion forming portion 8 of the body forming metal plate 1 shown in FIG. Thus, it is formed by being bent into a cylindrical shape. The photographic film 12 wound around the spool shaft 11 is drawn out in a state in which the surfaces on both sides thereof are in contact with the light-shielding telems 10a and 10b of the port portion 7, so that the photographic film in the cartridge is shielded from light.
[0048]
The width of the light shielding telemps 10a and 10b is not limited as long as it is in contact with the photographic film to such an extent that the photographic film accommodated in the cartridge is not exposed. For example, it is preferable that the width (corresponding to the depth when viewed from the port opening of the photographic film cartridge) is 8.8 to 9.7 mm for both of the light-shielding telems 10a and 10b. In particular, in consideration of the yield of the light shielding temple, the management of manufactured parts, etc., it is preferable to use the light shielding telemp having a narrow width and the same width. When both the widths of the light-shielding telemp are set to 8.8 to 9.7 mm, the length F-value in the width direction of the port portion forming portion of the body portion forming metal plate shown in FIG. It is preferable to set the thickness to ˜4.0 mm in order to improve the light shielding property of the photographic film cartridge. Further, it is preferable to reduce the F-value when the width of the telemp is reduced from 11.3 to 11.7 mm to 8.8 to 9.7 mm, but at the same time, in order to fit the lid member or the bottom member of the photographic film cartridge, It is preferable to increase the height of the step (invitation) portion K from 0.4 to 0.6 mm to 1.5 to 2.5 mm.
FIG. 2 shows a perspective view of an example of the body portion-forming metal plate 1 with a telemp having a large preferable step K when the width of the telemp is narrowed.
[0049]
After slitting, wind a thin light-shielding cloth piece while traversing a plastic reel. If the winding tension at this time is too low, the roll will collapse during transportation, and it will not be possible to pull out the thin light-shielding cloth pieces with the equipment. On the other hand, if the winding tension is too high, the pile may be crushed, which may cause poor light shielding properties.
[0050]
For example, the above-mentioned patrone body plate is formed by first forming a thin metal plate cut into a predetermined shape into a substantially boat-shaped cross section, and sticking the above-mentioned tempering to both left and right ends of the slab, and then the tempering is overlapped with each other. It is formed by bending a thin plate into a substantially cylindrical shape.
[0051]
As a method of sticking the telem to a thin plate, the telem is cut into a predetermined length in advance, and the cut telem is stuck to the stopped thin plate one by one while intermittently transporting the thin plate, Examples of methods for increasing productivity by increasing the landing processing speed are disclosed in JP-A-59-143841, JP-A-63-74869, JP-B-5-53256, and JP-A-7-301888. In this way, a plurality of thin plates are continuously conveyed in a state in which the front end and the rear end are substantially in contact with each other, and two long telems coated with adhesive are continuously applied to the left and right ends of the arranged thin plates, respectively. A method in which a telescopic blade is cut by putting a cutter blade between adjacent thin plates and then cutting it is put into practical use.
[0052]
The light-shielding cloth piece used in the present invention is a light-shielding cloth piece provided at the drawer opening of a cartridge of various photosensitive materials (photographic film, photographic paper, photosensitive resin film, etc.), and equipment (photo developing machine, etc.) for photosensitive substances. ) Can be used for lining for the purpose of light shielding. In particular, the film cartridge of the present invention stores various photographic films in a light-shielding manner, and can be stored for a long time without deteriorating photographic performance. In addition, it can be preferably applied to a container having a structure in which a film is drawn out from a drawing port, and in particular, various photographic photosensitive materials in sheet form and roll form (JIS 135 size photographic film, color photographic paper, computer-type photosetting film and photographic paper, thermal paper, photosensitive resin film). , Microfilm, X-ray film, etc.), which are known, such as adding a sensitizer such as a sulfur sensitizer, a reduction sensitizer and a gold sensitizer to a silver halide emulsion. It is suitable for storing a photosensitive material that has been sensitized by a technique, and particularly suitable for storing a photosensitive material that has been subjected to reduction sensitization by a reduction sensitizer.
[0053]
【Example】
EXAMPLES Hereinafter, although this invention is demonstrated in detail based on an Example, this invention is not limited by these.
Example 1
The structure of the light-shielding telemp having a knitted structure is a cross-spun structure shown in Japanese Utility Model Publication No. 7-50741. The pile knitted material is made of 84 dtex / 36-filament polyester yarn as a base yarn chain yarn and insertion yarn. As the pile yarn was used, 84 dtex / 72 filament polyester processed yarn was used, and a double raschel machine was used to knit the two front and back base fabrics connected with the pile yarn. At this time, the knitting gauge was 22 and the course density was 50, and then this base fabric was center-cut to obtain a light-shielding pile knitted fabric.
The pile thickness after the center cut is 2.2 mm. The polyester yarn used for the pile yarn was obtained by heating twice with a triaxial circumscribed friction false twisting device. The center-cut base fabric was appropriately adjusted in the length of the pile yarn in the pre-shearing step, and the pile was trimmed by brushing while being heated to 120 ° C. Furthermore, the pile was crimped and hardened by heating at 190 ° C. in a presetting process, and then dyed to give light shielding properties and dried. This gives a compression property of 0.49 N / cm at a pile thickness of 1.4 mm. ² 20% thickness displacement rate under load of 1.96 N / cm ² A shading cloth piece having a thickness displacement rate of 32% at the time of the load was obtained. The course density is 50, the well density is 26, and the pile density is 58,000 / cm. ² It is.
[0054]
A sealant that prevents penetration of the adhesive into the surface of the base fabric when the adhesive is applied to the base fabric for light shielding, and an adhesive layer that adheres the base fabric for light shielding to the cartridge body. In order to form, the weight after drying a vinyl acetate emulsion as a sealant on the ground surface of the base fabric is 55 g / m ² Then, a hot melt adhesive having a solid content of 100% is applied. The vinyl acetate emulsion used here has a solid content of 50% and a viscosity of 100,000 mPa · s.
As for the hot melt adhesive, an aromatic petroleum resin tackifying resin having a softening point of 140 ° C. is 15% by mass, an alicyclic hydrogenated petroleum resin tackifying resin having a softening point of 140 ° C., and a hydrogenation rate of 95%. 15% by mass or more, vinyl acetate content of 26%, MFR of 2 g / 10 min, bigat softening point of 54 ° C. ethylene vinyl acetate copolymer resin of 45% by mass, talc of 10% by mass, softening point An ethylene vinyl acetate-based adhesive formed with a composition of 15% by mass of polyethylene wax at 100 ° C., and a particle size produced by an oil furnace method with respect to a hot-melt adhesive to give light shielding properties is 24 nm. Carbon black (CB) with a DBP oil absorption of 76ml / 100g in powder form and pH of 8.0% by mass, phenolic to prevent oxidative degradation of the resin The antioxidant was added in a mode for kneading both 0.3 wt%, was used in which carbon black is dispersed by thoroughly kneaded. Using a hot melt adhesive prepared in this composition with a GPD hot melt die coater manufactured by Yuri Roll Machinery, the coating amount is 90 g / m on the ground surface of the light shielding base fabric at a resin temperature of 175 ° C. ² It applied so that it might become. The viscosity of the hot melt adhesive was 132,500 mPa · s (200 ° C.). The light-shielding base fabric thus obtained was ultrasonically slit to widths of 11.5 mm and 9.5 mm to obtain a light-shielding telemp according to the present invention.
[0055]
Thereafter, a plurality of thin plates are conveyed in a state where the front end and the rear end are close to each other, that is, in a state where the left end and the right end are aligned with each other, and a long two coated with an adhesive in advance. Are attached to each of the left and right ends of the thin plate being transported, and each of the telemps is continuously attached along the left and right ends of the thin plate, The cartridge was cut from the back surface for each thin plate to form a cartridge body plate. Further, a color negative film having an ISO sensitivity of 400 was wound around the spool and stored in the cartridge, and the quality characteristics of the light shielding property and the drawing resistance were evaluated in this state. The above-mentioned color negative film having an ISO sensitivity of 400 is the silver halide emulsion D described in JP-A-9-189980 (8.0% of thiourea dioxide as a reduction sensitizer with respect to 1 mol of silver halide). × 10 ^-7 (With a molar addition) applied to the base as an emulsion.
[0056]
Example 2
The base fabric was prepared in the same manner as in Example 1. A sealant that prevents penetration of the adhesive into the surface of the base fabric when the adhesive is applied to the base fabric for light shielding, and an adhesive layer that adheres the base fabric for light shielding to the cartridge body. In order to form, the weight after drying a vinyl acetate emulsion as a sealant on the ground surface of the base fabric is 55 g / m ² Then, a hot melt adhesive having a solid content of 100% is applied. The vinyl acetate emulsion used here has a solid content of 50% and a viscosity of 100,000 mPa · s. As for the hot melt adhesive, an aromatic petroleum resin tackifying resin having a softening point of 140 ° C. is 10% by mass, an alicyclic hydrogenated petroleum resin tackifying resin having a softening point of 140 ° C., and a hydrogenation rate of 95%. 20% by mass or more and other components were blended and produced in the same manner as in Example 1 to obtain a hot melt adhesive. Using a hot melt adhesive prepared with this composition and a GPD hot melt die coater made by Yuri Roll Machinery, a coating amount of 90 g / m is applied to the ground surface of the light shielding base fabric at a resin temperature of 175 ° C. ² It applied so that it might become. The viscosity of the hot melt adhesive was 125,000 mPa · s (200 ° C.). The light-shielding base fabric thus obtained was ultrasonically slit to widths of 11.5 mm and 9.5 mm to obtain a light-shielding telemp according to the present invention. Thereafter, samples were prepared in the same manner as in Example 1.
[0057]
Example 3
The base fabric was prepared in the same manner as in Example 1. A sealant that prevents penetration of the adhesive into the surface of the base fabric when the adhesive is applied to the base fabric for light shielding, and an adhesive layer that adheres the base fabric for light shielding to the cartridge body. In order to form, the weight after drying a vinyl acetate emulsion as a sealant on the ground surface of the base fabric is 55 g / m ² Then, a hot melt adhesive having a solid content of 100% is applied. The vinyl acetate emulsion used here has a solid content of 50% and a viscosity of 100,000 mPa · s. As for the hot melt adhesive, an aromatic petroleum resin tackifying resin having a softening point of 140 ° C. is 20% by mass, an alicyclic hydrogenated petroleum resin tackifying resin having a softening point of 140 ° C. and a hydrogenation rate of 95%. 10% by mass or more and other components were blended and produced in the same manner as in Example 1 to obtain a hot melt adhesive.
Using a hot melt adhesive prepared in this composition with a GPD hot melt die coater manufactured by Yuri Roll Machinery, the coating amount is 90 g / m on the ground surface of the light shielding base fabric at a resin temperature of 175 ° C. ² It applied so that it might become. The viscosity of the hot melt adhesive was 133,750 mPa · s (200 ° C.). The light-shielding base fabric thus obtained was ultrasonically slit to widths of 11.5 mm and 9.5 mm to obtain a light-shielding telemp according to the present invention. Thereafter, samples were prepared in the same manner as in Example 1.
[0058]
Example 4
The base fabric was prepared in the same manner as in Example 1. A sealant that prevents penetration of the adhesive into the surface of the base fabric when the adhesive is applied to the base fabric for light shielding, and an adhesive layer that adheres the base fabric for light shielding to the cartridge body. In order to form, the weight after drying a vinyl acetate emulsion as a sealant on the ground surface of the base fabric is 55 g / m ² Then, a hot melt adhesive having a solid content of 100% is applied. The vinyl acetate emulsion used here has a solid content of 50% and a viscosity of 100,000 mPa · s. As for the hot melt adhesive, the hydrogenation rate is 15% by mass of an aromatic petroleum resin tackifying resin having a softening point of 140 ° C. and an alicyclic hydrogenated petroleum resin tackifying resin having a softening point of 140 ° C. 95% or more of 15% by mass, to give light-shielding properties, the particle diameter produced by oil furnace method for hot melt adhesive is 24 nm, DBP oil absorption is powdery, 76 ml / 100 g, pH is Carbon black having a characteristic of 8.0 was 0.3% by mass, and other components were blended and produced in the same manner as in Example 1 to obtain a hot melt adhesive. Using a hot melt adhesive prepared in this composition with a GPD hot melt die coater manufactured by Yuri Roll Machinery, the coating amount is 90 g / m on the ground surface of the light shielding base fabric at a resin temperature of 175 ° C. ² It applied so that it might become. The viscosity of the hot melt adhesive was 127,500 mPa · s (200 ° C.). The light-shielding base fabric thus obtained was ultrasonically slit to widths of 11.5 mm and 9.5 mm to obtain a light-shielding telemp according to the present invention. Thereafter, samples were prepared in the same manner as in Example 1.
[0059]
Comparative Example 1
The base fabric was prepared in the same manner as in Example 1. A sealant that prevents penetration of the adhesive into the surface of the base fabric when the adhesive is applied to the base fabric for light shielding, and an adhesive layer that adheres the base fabric for light shielding to the cartridge body. In order to form, the weight after drying a vinyl acetate emulsion as a sealant on the ground surface of the base fabric is 55 g / m ² Then, a hot melt adhesive having a solid content of 100% is applied. The vinyl acetate emulsion used here has a solid content of 50% and a viscosity of 100,000 mPa · s. As for the hot melt adhesive, 30% by mass of an aromatic petroleum resin tackifying resin having a softening point of 140 ° C. and other components were blended and produced in the same manner as in Example 1 to obtain a hot melt adhesive. Using a hot melt adhesive prepared in this composition with a GPD hot melt die coater manufactured by Yuri Roll Machinery, the coating amount is 90 g / m on the ground surface of the light shielding base fabric at a resin temperature of 175 ° C. ² It applied so that it might become. The viscosity of the hot melt adhesive was 152,500 mPa · s (200 ° C.). The light-shielding base fabric thus obtained was ultrasonically slit to widths of 11.5 mm and 9.5 mm to obtain a light-shielding telemp according to the present invention. Thereafter, samples were prepared in the same manner as in Example 1.
[0060]
[Table 1]

[0061]
From the results in Table 1, it was confirmed that the product of the present invention was superior to the conventional product in both equipment suitability and quality. Here, AA is a very good state, BB is a state where it can be used without any problem in practice, and CC is within a practical limit, but a problem may occur, and a state where improvement is desirable. .
[0062]
(2) Evaluation method
(Thickness)
Measured using PEACOCK dial gauge model G.
(Coating grade)
Using a GPD hot melt die coater manufactured by Yuri Roll Machinery Co., Ltd., the adhesive was applied to the ground surface (back surface) of the light shielding base fabric having a width of 500 mm at a speed of 3 m / min. After coating, the quality of the coated surface and the amount of pinholes were visually observed. A pinhole amount of less than 5 within an effective coating width per 10 m of the base fabric was designated as rank AA, 5 to less than 10 was designated as rank BB, and 10 or more was designated as rank CC.
(Suitability of ultrasonic slit)
Using an ultrasonic slitting machine with a frequency of 15 KHz and an amplitude of 40 μm, slitting was performed at a processing speed of 5 m / min. The state of resin residue adhering to the ribbon after slitting and the amount of adhesion were visually observed. A case where the number of resin residue adhered per 10 m of the narrow width light-shielding cloth piece was less than 10 was designated as rank AA, 10 to 30 pieces were designated as rank BB, and 30 pieces or more were designated as rank CC.
(Adhesive strength)
A ribbon sample slit (cut) to a width of 11.5 mm is applied to the inner surface of a metal plate used for a cartridge body plate at a temperature of 140 ° C. and a load of 1.08 N / cm. ² (110 gf / cm ² ), Bonded under conditions of 3 seconds crimping time, left at 23 ° C. for 24 hours, and then pulled at 300 mm / min with a Toyo Seiki strograph tester equipped with a high-temperature and high-humidity tank set at 80 ° C. Measure 180 ° peel strength.
(Light shielding)
After conditioning the sample for 24 hours at room temperature, the sample was exposed to light from 90,000 lux for 30 minutes from the direction of the port mouth, then the photographic film was developed, and light exposure of the photographic image due to light leakage was developed. Observe visually.
(Photo characteristics)
Adhesive and silver halide emulsion D described in JP-A-9-189980 (8.0 × 10 8 thiourea dioxide as a reduction sensitizer with respect to 1 mol of silver halide) ^-7 The emulsion is coated with a color photographic light-sensitive material emulsion coating surface, which is added in the form of a mole), stored in a laminated material having a light-shielding and moisture-proof function, sealed by heat sealing, and then kept at 60 ° C. It was left for 3 days in the adjusted high temperature and high humidity tank. After being allowed to stand, the photographic photosensitive material taken out from the laminated material was subjected to white wedge exposure, standard development, and measured with a covering density (unexposed area density) of the photographic photosensitive material after development and a film density measuring machine. The difference (ΔFOG) between the density of the fog and the density of the fog (unexposed area density) obtained by leaving, exposing and developing only the photographic photosensitive material without superimposing it on the evaluation sample. ) Was calculated. The smaller the ΔFOG, the better the possibility of image failure. The ΔFOG shown in Table 1 is the value of the uppermost emulsion layer (blue sensitive layer) of the color photographic light-sensitive material.
[0063]
【The invention's effect】
According to the present invention, a light-shielding cloth piece coated with an adhesive satisfying an inexpensive and sufficient adhesive strength, ultrasonic slit suitability, coating suitability, and light-shielding property, and a light-shielding container for a photosensitive material such as a photographic film using the same. Could be provided. In addition, a light-shielding cloth piece that does not deteriorate the photographic characteristics of a photosensitive material having a silver halide emulsion subjected to reduction sensitization, and a light-shielding container for a photosensitive material such as a photographic film using the same.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a front view of an example of a body part forming metal plate in which light-shielding telemps are attached to both left and right ends using a long light-shielding telemp connector of the present invention.
FIG. 2 is a perspective view of an example of a body part forming metal plate provided with a stepped part, preferably used when the width of the long light-shielding telemp of the present invention is both 8.8 to 9.7 mm.
FIG. 3 is a cross-sectional view of an example of a photographic film cartridge using the body part forming metal plate with a light-shielding telemp shown in FIG.
[Explanation of symbols]
1. Body plate forming metal plate
7 Port part
7a, 7b Port part forming part
8 Tube forming part
9a, 9b Convex part of cylindrical part forming part
10a, 10b Light-shielding telemp
11 Spool shaft
12 Photo film
A Length in the width direction of the body plate forming metal plate
B Longitudinal length of the body part forming metal plate
C, D Length of port part forming part in the vertical direction
E, F Length of the port forming part in the width direction
G, H Length in the width direction from the end of the port forming portion to the end of the convex portion of the tube forming portion
I, J Length in the vertical direction from the end of the port forming part to the end of the convex part of the tube forming part
K step (invitation) part

Claims (5)

A container for recording material, wherein an adhesive containing a hydrogenated tackifying resin as a tackifying resin component is used. A piece of cloth characterized in that an adhesive containing a hydrogenated tackifying resin as a tackifying resin component is applied to the back of the base fabric tissue. 2. The recording material container according to claim 1, wherein the hydrogenated tackifying resin is an alicyclic hydrogenated petroleum resin. The piece of cloth according to claim 2, wherein the hydrogenated tackifying resin is an alicyclic hydrogenated petroleum resin. 5. A light-shielding container for photosensitive material having a slit-shaped opening for taking in and out the photosensitive material, wherein the cloth piece according to claim 2 or 4 has a light-shielding property adhered to the opening. .

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