JPH0915814A - Roller for automatic developing machine - Google Patents

Roller for automatic developing machine

Info

Publication number
JPH0915814A
JPH0915814A JP16500395A JP16500395A JPH0915814A JP H0915814 A JPH0915814 A JP H0915814A JP 16500395 A JP16500395 A JP 16500395A JP 16500395 A JP16500395 A JP 16500395A JP H0915814 A JPH0915814 A JP H0915814A
Authority
JP
Japan
Prior art keywords
roller
resin layer
polypropylene
resin
developing machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP16500395A
Other languages
Japanese (ja)
Other versions
JP3376767B2 (en
Inventor
Yoshihiro Wago
好広 和合
Yoshihiro Kusunoki
嘉宏 楠
Yuichiro Maruyama
雄一郎 丸山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Riko Co Ltd
Original Assignee
Sumitomo Riko Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Riko Co Ltd filed Critical Sumitomo Riko Co Ltd
Priority to JP16500395A priority Critical patent/JP3376767B2/en
Publication of JPH0915814A publication Critical patent/JPH0915814A/en
Application granted granted Critical
Publication of JP3376767B2 publication Critical patent/JP3376767B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Photographic Processing Devices Using Wet Methods (AREA)

Abstract

PURPOSE: To provide a roller for automatic developing machine in which the maintenance frequency can be permanently reduced with no adhesion of dirt onto the surface, and satisfactory developing property can be exhibited with excellent water holding property. CONSTITUTION: This roller for automatic developing machine has, on the outer circumference of a cylindrical or columnar reinforcing core material 2, a resin layer 1 formed of a polypropylene having an intramolecular stereoregularity of 0.94 or more, quantitatively measured by nuclear magnetic resonance, and a contact angle by distilled water within the range of 90 deg.-130 deg., the surface of which is roughed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、写真フィルム等の写真
感光材料を搬送しながら自動的に現像する自動現像機用
のローラーに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller for an automatic developing machine which automatically develops a photographic light-sensitive material such as a photographic film while conveying it.

【0002】[0002]

【従来の技術】自動現像機は、ハロゲン化銀を樹脂フィ
ルム等に塗布乾燥させた写真感光材料を搬送しながら、
現像、定着、水洗、及び乾燥の各工程からなる現像処理
を自動的に行う装置であり、通常の写真フィルムの現像
処理の外、医療用のX線写真、印刷用のグラフィック写
真等の現像処理に使用されている。
2. Description of the Related Art An automatic developing machine conveys a photographic light-sensitive material obtained by coating and drying a silver halide film on a resin film,
This is an equipment that automatically performs the development process consisting of development, fixing, washing, and drying steps. In addition to the development process of ordinary photographic film, development process of medical X-ray photographs, graphic photographs for printing, etc. Is used for.

【0003】かかる自動現像機に使用されているフィル
ム搬送用ローラーとしては、従来から、シリコンゴム系
の高摩擦係数のローラーと共に、耐薬品性や耐熱性に優
れた熱硬化性樹脂、例えばフェノール樹脂やウレタン樹
脂からなるローラーが一般的に使用されていた。又、最
近では加工性やコストの関係で、ABSやPVC等の耐
薬品性に優れた熱可塑性樹脂のローラーも一部で使用さ
れている。
As a roller for transporting a film used in such an automatic processor, a thermosetting resin excellent in chemical resistance and heat resistance, such as a phenol resin, has been conventionally used together with a roller having a high friction coefficient of silicon rubber. Rollers made of urethane resin were commonly used. Further, recently, due to workability and cost, a roller made of a thermoplastic resin having excellent chemical resistance such as ABS and PVC is also partially used.

【0004】これらのローラーを用いて自動現像機でフ
ィルムの現像処理を行う場合、ローラーはその全体又は
一部を現像液や定着液等に浸漬して使用されるか、若し
くは写真感光材料に付着した現像液等を絞り取りながら
フィルムを搬送するものであるから、写真感光材料から
現像液等に溶け出した銀化合物やゼラチン等がローラー
表面に付着する可能性が非常に高い。
When a film is developed by an automatic developing machine using these rollers, the roller is used by dipping the whole or a part of the roller in a developing solution, a fixing solution or the like, or by adhering it to a photographic light-sensitive material. Since the film is conveyed while squeezing the developed solution or the like, there is a very high possibility that the silver compound, gelatin, or the like dissolved from the photographic light-sensitive material into the developer or the like will adhere to the roller surface.

【0005】従って、溶け出したゼラチンやハロゲン化
銀、あるいは現像液や定着液の劣化によって発生する異
物等によりローラー表面に汚れが付着し、この為に現像
においてフィルムの増感等の不具合を生じ、画像上に黒
点等が発生しやすい。特に医療用のX線写真に上記不具
合が生じた場合には、誤診等の重大問題につながる危険
がある。
Therefore, the surface of the roller is contaminated by the melted gelatin or silver halide, or the foreign matters generated by the deterioration of the developing solution or the fixing solution, which causes a problem such as sensitization of the film during development. , Black spots are likely to occur on the image. In particular, when the above-mentioned problem occurs in a medical X-ray photograph, there is a risk of leading to serious problems such as misdiagnosis.

【0006】このような汚れは、前記のごとくゼラチン
系の物質の付着と銀化合物の付着に大別されるが、特に
後者の場合には定期的なメンテナンスを実施しても汚れ
の付着が除去できず、最悪の場合にはローラーの交換が
必要になる。特に高分子材料の場合、一般的にその表面
エネルギーが高い為、これらの汚れが付着しやすいとい
う欠点を有している。
[0006] Such stains are roughly classified into the adhesion of gelatin-based substances and the adhesion of silver compounds as described above. Especially in the latter case, the adherence of stains is removed even if regular maintenance is carried out. No, and in the worst case, the rollers need to be replaced. Particularly, in the case of a polymer material, since its surface energy is generally high, there is a drawback that these stains are likely to adhere.

【0007】[0007]

【発明が解決しようとする課題】前記したローラーへの
汚れの付着を防止する目的で、ローラーを構成する各種
樹脂に、フッ素系又はシリコン系のパウダーあるいはオ
レフィン系の樹脂パウダー等の高撥水性のパウダーを混
合、分散させることにより、ローラー表面への汚れの付
着を抑制する方法も提案されている。しかし、この方法
では、ローラー表面のパウダーが存在する局所的な部分
で汚れの付着を少なくすることはできても、汚れの付着
を恒久的に防止するには至っていない。
For the purpose of preventing the adhesion of dirt to the above-mentioned roller, various resins constituting the roller have high water repellency such as fluorine-based or silicon-based powder or olefin-based resin powder. A method of suppressing adhesion of dirt to the roller surface by mixing and dispersing powder has also been proposed. However, with this method, although it is possible to reduce the adherence of stains at the local portion of the roller surface where powder is present, the adherence of stains has not been prevented permanently.

【0008】又、ローラーとして一般的な樹脂材料を使
用した場合には、特開平6−83016号公報に記載さ
れているように、接触角が80°を越える撥水性の高い
材料は、汚れの付着防止に有効であっても、ローラー表
面の保水性が著しく低下するため、現像ムラが発生する
という不具合が生じ、実用化は困難であった。
Further, when a general resin material is used for the roller, as described in JP-A-6-83016, a material having a contact angle of more than 80 ° and high water repellency causes stains. Even if it is effective for preventing adhesion, the water retention property on the roller surface is remarkably reduced, which causes a problem that uneven development occurs, which makes practical application difficult.

【0009】本発明は、かかる従来の事情に鑑み、表面
への汚れの付着がなく、恒久的にメンテナンス回数を低
減でき、しかも保水性に優れ、良好な現像性を発揮する
ことのできる、自動現像機用ローラーを提供することを
目的とする。
In view of such conventional circumstances, the present invention is capable of reducing the number of maintenances permanently without stains on the surface, excellent in water retention and exhibiting good developability. An object is to provide a roller for a developing machine.

【0010】[0010]

【課題を解決するための手段】上記目的を達成するた
め、本発明が提供する自動現像機用ローラーは、円筒状
又は円柱状の補強芯材の外周に、核磁気共鳴法により定
量した分子内立体規則性が0.94以上且つ蒸留水によ
る接触角が90°〜130°の範囲にあるポリプロピレ
ンからなり、表面が粗面化されている樹脂層を有するこ
とを特徴としている。
In order to achieve the above object, the roller for an automatic processor provided by the present invention has an intramolecular quantified by a nuclear magnetic resonance method on the outer periphery of a cylindrical or cylindrical reinforcing core material. It is characterized by having a resin layer having a roughened surface, which is made of polypropylene having a stereoregularity of 0.94 or more and a contact angle with distilled water in the range of 90 ° to 130 °.

【0011】又、この自動現像機用ローラーは、前記樹
脂層の表面粗さが、中心線平均粗さRaで0.1〜0.6
μm、及び最大高さ粗さRmaxで1〜7μmの範囲にあ
ることを特徴とするものである。
Further, in this automatic processor roller, the surface roughness of the resin layer is 0.1 to 0.6 in terms of center line average roughness Ra.
μm, and the maximum height roughness Rmax is in the range of 1 to 7 μm.

【0012】[0012]

【作用】本発明では、ローラー表面への汚れの付着が、
初期においては樹脂と銀化合物のアンカー効果による物
理的な付着で始まり、これを起因として汚れが広範囲に
広がって行くという事実を実験的に確認したことに基づ
き、ローラーのベースとなる樹脂自体に銀化合物と物理
的に付着しにくい材質を見いだすことにより、汚れの付
着が起こらず、恒久的にメンテナンス回数を低減できる
ローラーを開発したものである。
In the present invention, the adhesion of dirt to the roller surface is
Based on the experimental confirmation of the fact that in the early stage physical adhesion started due to the anchor effect of the resin and the silver compound, and that this caused stains to spread over a wide area, silver was added to the resin itself, which is the base of the roller. By finding a material that is hard to physically adhere to the compound, we have developed a roller that does not cause dirt to adhere and can reduce the number of maintenances permanently.

【0013】本発明が提供する自動現像機用ローラー
は、図1に示すように、補強芯材2としての円筒状のパ
イプ又は円柱状の芯棒の外周に、高分子の熱可塑性樹脂
を被覆した構造であり、この樹脂層1が結晶性の高いポ
リプロピレン、即ち核磁気共鳴法(NMR)により定量
した分子内立体規則性が0.94以上であるポリプロピ
レンで構成されている。分子内立体規則性が0.94未
満では結晶化度が低く、目的の表面性能が得られないか
らである。
As shown in FIG. 1, the roller for an automatic processor provided by the present invention coats the outer periphery of a cylindrical pipe or a cylindrical core rod as a reinforcing core material 2 with a polymer thermoplastic resin. The resin layer 1 is made of polypropylene having high crystallinity, that is, polypropylene having an intramolecular stereoregularity of 0.94 or more as determined by a nuclear magnetic resonance method (NMR). If the intramolecular stereoregularity is less than 0.94, the crystallinity is low and the desired surface performance cannot be obtained.

【0014】ここで立体規則性とは、ポリプロピレンの
アイソタクチック型、シンジオタクチック型、アタクチ
ック型の3種の立体異性体のうち、アイソタクチック型
の占める比率を意味し、これら立体異性体の化学的シフ
トの相違から、NMRスペクトルによりアイソタクチッ
ク型の比率を決定することが通常行われている。
Here, the stereoregularity means the ratio of the isotactic type among the three types of stereoisomers of polypropylene such as isotactic type, syndiotactic type and atactic type. It is common practice to determine the isotactic ratio by the NMR spectrum because of the difference in the chemical shift of

【0015】又、そのローラー表面の樹脂層の接触角が
90°〜130°であることが必要である。尚、接触角
は蒸留水を用いて測定する蒸留水法によった。この接触
角が90°未満では汚れの付着が多くなり、接触角が1
30°を越えると表面が滑り易くなり写真感光材料フィ
ルムの搬送が困難となると共に、現像液や定着液等に対
する撥水性が高くなり過ぎるため現像ムラが発生しやす
くなる。
The contact angle of the resin layer on the roller surface must be 90 ° to 130 °. The contact angle was measured by the distilled water method using distilled water. If this contact angle is less than 90 °, the adhesion of dirt increases and the contact angle becomes 1
If it exceeds 30 °, the surface becomes slippery and it becomes difficult to convey the photographic light-sensitive material film, and the water repellency with respect to the developing solution, the fixing solution, etc. becomes too high, and uneven development easily occurs.

【0016】接触角は本質的には材料のポリプロピレン
により決まり、ポリプロピレンの結晶化度、即ち分子内
立体規則性が高いほど大きくなるが、ローラーとしては
前記のごとく90°〜130°の範囲が好適である。従
って、押出等により形成したローラー表面に、円筒研
磨、センターレス研磨等の研磨仕上げや、バフ仕上げ等
を施し、樹脂層表面を粗面化し、液との濡れ性を良くす
ることが必要である。
The contact angle is essentially determined by the material polypropylene, and the higher the crystallinity of polypropylene, that is, the higher the stereoregularity in the molecule, the larger the contact angle, but as described above, the range of 90 ° to 130 ° is preferable for the roller. Is. Therefore, it is necessary to improve the wettability with the liquid by roughening the surface of the resin layer by subjecting the roller surface formed by extrusion or the like to polishing finishing such as cylindrical polishing or centerless polishing, or buffing. .

【0017】尚、前記特開平6−83016号公報に記
載されているように、接触角が80°を越える撥水性の
高い樹脂材料では、ローラー表面の保水性が著しく低下
するため現像ムラが発生するとされていたが、本発明で
用いる高結晶性ポリプロピレンは90°以上の大きな接
触角にも拘らず、優れた保水性を示し、現像ムラを発生
させることがない。
As described in Japanese Patent Laid-Open No. 6-83016, a resin material having a contact angle of more than 80 ° and high water repellency causes water retention on the roller surface to be significantly reduced, resulting in uneven development. However, the highly crystalline polypropylene used in the present invention exhibits excellent water retention and does not cause uneven development, despite the large contact angle of 90 ° or more.

【0018】一方、従来使用されていた一般的な結晶性
ポリプロピレンは、NMRによる分子内立体規則性が
0.93以下であり、ローラー表面に汚れの付着が起こ
りやすく、且つ保水性が悪いため現像ムラを発生しやす
い。
On the other hand, the general crystalline polypropylene that has been conventionally used has an intramolecular stereoregularity of 0.93 or less according to NMR, is liable to cause stains on the roller surface, and has poor water retention, and thus is developed. It is easy to cause unevenness.

【0019】本発明のローラーにおいては、樹脂層の表
面粗さが、中心線平均粗さRaで0.1〜0.6μm、及
び最大高さ粗さRmaxで1〜7μmの範囲にあることが
好ましい。更に好ましくは、Raが0.2〜0.5μm、
及びRmaxが2〜6μmの範囲が望ましい。表面粗さが
上記の範囲より小さいと、保水性が低下して現像ムラを
起こしやすく、逆に表面粗さが大きくなるとローラー凸
部の影響により、梨地ムラ等が発生しやすくなる。
In the roller of the present invention, the surface roughness of the resin layer is in the range of 0.1 to 0.6 μm in the center line average roughness Ra and 1 to 7 μm in the maximum height roughness Rmax. preferable. More preferably, Ra is 0.2 to 0.5 μm,
And Rmax is preferably in the range of 2 to 6 μm. When the surface roughness is smaller than the above range, the water retention property is likely to decrease, and uneven development is likely to occur. On the contrary, when the surface roughness is large, the unevenness of a satin is likely to occur due to the influence of the roller protrusions.

【0020】ローラーの構造としては、図1に示す樹脂
層1を被覆した補強芯材2の両端部に、樹脂層と同一種
類の樹脂材料(グレード違いは可)で作製した軸端3を
取り付け、この軸端3と樹脂層1とを高周波にて溶融接
着することが好ましい。軸端3と樹脂層1とを高周波溶
着することにより、両者の気密性及び接着力が非常に高
くなるため、現像液等に長時間浸漬して使用しても剥離
等のローラーの機能が損なわれるような欠陥の発生が起
こりにくい。尚、図1に示す4は、軸端3に固定された
軸芯であって、軸受に保持される部分である。
As for the structure of the roller, shaft ends 3 made of the same kind of resin material as the resin layer (different grades are acceptable) are attached to both ends of the reinforcing core material 2 covered with the resin layer 1 shown in FIG. It is preferable that the shaft end 3 and the resin layer 1 are melt-bonded at a high frequency. By welding the shaft end 3 and the resin layer 1 at a high frequency, the airtightness and the adhesive force between the two become very high. Therefore, even when the shaft end 3 and the resin layer 1 are immersed in a developer for a long time, the function of the roller such as peeling is impaired. Occurrence of such defects is unlikely to occur. In addition, 4 shown in FIG. 1 is a shaft core fixed to the shaft end 3, and is a portion held by a bearing.

【0021】かかる本発明のローラーは、樹脂層として
高結晶性のポリプロピレンを使用することで、従来不適
当とされていた高い接触角にも拘らず、良好な保水性と
現像性を示し、現像液や定着液などに長時間浸漬して使
用しても汚れの付着が殆ど起こらない。又、高結晶性の
ポリプロピレンを使用するため、剛性及び耐熱性に優れ
ており、且つ表面硬度が高いのでローラー表面に傷等が
付きにくく、耐摩耗性にも優れている。
The roller of the present invention, by using a highly crystalline polypropylene as the resin layer, exhibits good water retention and developability in spite of a high contact angle, which has hitherto been unsuitable, and develops. Even if it is dipped in a solution or a fixing solution for a long time and used, dirt hardly adheres. In addition, since polypropylene having high crystallinity is used, it has excellent rigidity and heat resistance, and since the surface hardness is high, the roller surface is less likely to be scratched and the abrasion resistance is also excellent.

【0022】[0022]

【実施例】実施例1 図1に示すように、補強芯材2として外径16mmのア
ルミニウム製の補強パイプを用い、その補強パイプの外
周に下記表1に示す各樹脂をそれぞれ押出成形し、肉厚
2mmの樹脂層1を備えたローラーを作製した。全ての
ローラーの表面粗さは、研磨仕上げを施すことにより、
Raで0.3〜0.4μm及びRmaxで3〜5μmの範囲内
に設定した。
【Example】Example 1  As shown in FIG. 1, the reinforcing core material 2 has an outer diameter of 16 mm.
Use a reinforcement pipe made of luminium, and
Each resin shown in Table 1 below was extruded around the circumference to obtain a
A roller provided with a 2 mm resin layer 1 was produced. All of
The surface roughness of the roller is
Within the range of 0.3 to 0.4 μm for Ra and 3 to 5 μm for Rmax
Set to.

【0023】各樹脂層の主成分となる樹脂は、表1に示
すように結晶化度の異なる、従ってNMRで定量した分
子内立体規則性の異なる4種類のポリプロピレン、4種
類のフェノール樹脂、及びABS樹脂である。尚、試料
4のポリプロピレンは、従来一般的に使用されている結
晶性ポリプロピレンである。
The resins which are the main components of the respective resin layers are, as shown in Table 1, four kinds of polypropylenes having different crystallinity, and thus having different intramolecular stereoregularity determined by NMR, four kinds of phenol resins, and ABS resin. The polypropylene of Sample 4 is a crystalline polypropylene that has been generally used conventionally.

【0024】又、4種類のフェノール樹脂のうち、試料
5は従来一般的に自動現像機用ローラーとして用いられ
てきた材料であり、試料6は試料4の樹脂100重量部
に対し10重量部のシリコンパウダーを混合したもの、
試料7は同じく10重量部のポリエチレンパウダーを混
合したもの、試料8は同じく10重量部のフッ素樹脂パ
ウダーを混合したものである。
Of the four types of phenolic resin, sample 5 is a material which has been conventionally generally used as a roller for an automatic developing machine, and sample 6 is 10 parts by weight per 100 parts by weight of resin of sample 4. A mixture of silicone powder,
Sample 7 is a mixture of 10 parts by weight of polyethylene powder, and sample 8 is a mixture of 10 parts by weight of fluororesin powder.

【0025】[0025]

【表1】試料 樹 脂 層 ハ゜ウタ゛ー添加 特 記 事 項 1 ホ゜リフ゜ロヒ゜レン 無し 立体規則性0.98 2 ホ゜リフ゜ロヒ゜レン 無し 立体規則性0.97 3 ホ゜リフ゜ロヒ゜レン 無し 立体規則性0.95 4* ホ゜リフ゜ロヒ゜レン 無し 立体規則性0.93 5* フェノール樹脂 無し 現行ローラー品 6* フェノール樹脂 シリコンハ゜ウタ゛ー 撥水性ハ゜ウタ゛ー混合 7* フェノール樹脂 ホ゜リエチレンハ゜ウタ゛ー 撥水性ハ゜ウタ゛ー混合 8* フェノール樹脂 フッ素樹脂ハ゜ウタ゛ー 撥水性ハ゜ウタ゛ー混合 9* ABS樹脂 無し 現行ローラー品 (注)表中の*を付した試料は比較例である。TABLE 1 Sample resins layer Pauta Bu chromatography adding JP Symbol matters 1 polyps propylene without stereoregularity 0.98 2 polyps propylene without stereoregularity 0.97 3 polyps propylene without stereoregularity 0.95 4 * polyps propylene without stereoregularity 0.93 5 * phenolic resin without current roller Product 6 * Phenolic resin Silicone powder Water-repellent powder mixture 7 * Phenolic resin Polyethylene powder Water-repellent powder mixture 8 * Phenolic resin Fluorine resin powder Water-repellent powder mixture 9 * No ABS resin Current roller product (*) in table The sample is a comparative example.

【0026】得られた各試料のローラーについて、樹脂
層の硬度を測定すると共に、表面の接触角を蒸留水法に
より測定した。又、各ローラーを自動現像機の簡易耐久
試験機に組み付け、現像液及び定着液の液温度を40℃
に設定し、その液中に各ローラーを浸漬して、15mm
/secの周速度にて回転させながら写真感光材料(フ
ィルム)を連続して100時間搬送させた後、各ローラ
ー表面の汚れを目視にて観察評価した。
With respect to each of the obtained rollers of the samples, the hardness of the resin layer was measured, and the contact angle of the surface was measured by the distilled water method. In addition, each roller was installed in the simple durability tester of the automatic developing machine, and the temperature of the developing solution and the fixing solution was 40 ° C.
Set each to 15 mm by immersing each roller in the liquid.
After the photographic light-sensitive material (film) was continuously conveyed for 100 hours while being rotated at a peripheral speed of / sec, stains on each roller surface were visually observed and evaluated.

【0027】又、各ローラーの耐薬品性は、以下の2通
りの方法にて評価した。即ち、5規定の塩酸及び2規定
の水酸化ナトリウムの各水溶液(60℃)に72時間づ
つ浸漬させた後、外観を目視にて判定し且つ寸法変化と
重量変化を測定する方法と、一般的に用いられる現像液
及び定着液の各原液(60℃)に1か月間浸漬させた
後、外観を目視にて判定し且つ寸法変化と重量変化を測
定する方法とにより、総合的に評価した。尚、上記の原
液とは、通常は薄めて使用する液を薄めずにそのまま使
用したものである。
The chemical resistance of each roller was evaluated by the following two methods. That is, after immersing each in an aqueous solution of 5N hydrochloric acid and 2N sodium hydroxide (60 ° C) for 72 hours, the appearance is visually determined and the dimensional change and the weight change are measured. After being immersed in each stock solution (60 ° C.) of the developing solution and the fixing solution used for 1 month for 1 month, the appearance was visually judged and the dimensional change and the weight change were comprehensively evaluated. The above-mentioned undiluted solution is a solution that is usually diluted and used as it is without being diluted.

【0028】更に、ローラーの保水性については、図2
に示すように簡易試験機にローラーを組み付け、現像液
及び定着液(20℃及び40℃)の場合について、液面
6に位置し液中に半分浸漬している各ローラー5の表面
の濡れ性を目視にて観察評価した。
Further, as to the water retention of the roller, see FIG.
As shown in Fig. 6, the roller is assembled in the simple tester, and in the case of the developing solution and the fixing solution (20 ° C and 40 ° C), the wettability of the surface of each roller 5 located on the liquid level 6 and half immersed in the liquid Was visually observed and evaluated.

【0029】以上の結果を表2に示した。尚、耐汚れ付
着性、耐薬品性、保水性の評価における記号は、それぞ
れ◎が極めて良好、○が良好、△が使用可能、×が不良
を意味する。
The above results are shown in Table 2. In the evaluation of stain resistance, chemical resistance, and water retention, ⊚ means extremely good, ∘ means good, Δ means usable, and x means bad.

【0030】[0030]

【表2】試料 硬 度 接触角 耐汚れ 耐薬品性 保水性 1 120(R) 130° ◎ ○ △〜○ 2 110(R) 110° ◎ ○ ○ 3 105(R) 92° ○ ○ ○ 4* 100(R) 95° △ ○ △〜○ 5* 113(M) 60° × ○ ◎ 6* 105(M) 70° △ ○ ○ 7* 103(M) 65° △ ○ ○ 8* 110(M) 75° △ ○ ○ 9* 100(R) 85° △ △ ○ (注)表中の*を付した試料は比較例である。尚、硬度
の欄のR及びMはロックウエル硬度(JIS K720
2)のスケールを示す。
[Table 2] Sample hardness Contact angle Contamination resistance Chemical resistance Water retention 1 120 (R) 130 ° ◎ ○ △ ~ ○ 2 110 (R) 110 ° ◎ ○ ○ 3 105 (R) 92 ° ○ ○ ○ 4 * 100 (R) 95 ° △ ○ △ to ○ 5 * 113 (M) 60 ° × ○ ◎ 6 * 105 (M) 70 ° △ ○ ○ 7 * 103 (M) 65 ° △ ○ ○ 8 * 110 (M) 75 ° △ ○ ○ 9 * 100 (R) 85 ° △ △ ○ (Note) Samples marked with * in the table are comparative examples. Incidentally, R and M in the column of hardness are Rockwell hardness (JIS K720
The scale of 2) is shown.

【0031】上記の結果より、結晶化度が低いポリプロ
ピレン(試料4)、従来のフェノール樹脂(試料5〜
8)、及びABS樹脂(試料9)を主成分とする樹脂層
からなるローラーは、表面に汚れが付着しやすく、特に
一般的な結晶化度のポリプロピレン(試料4)は接触角
がかなり高くても、本発明による同等の接触角のポリプ
ロピレン樹脂層をもつローラー(試料1〜3)よりも汚
れの付着量が多くなっている。
From the above results, polypropylene having a low crystallinity (Sample 4) and conventional phenol resin (Sample 5)
8), and a roller composed of a resin layer containing ABS resin (Sample 9) as a main component, dirt is apt to adhere to the surface, and polypropylene having a general crystallinity (Sample 4) has a considerably high contact angle. Also, the amount of dirt attached is larger than that of the roller (Samples 1 to 3) having the polypropylene resin layer having the same contact angle according to the present invention.

【0032】これに対して、高結晶性ポリプロピレンで
樹脂層を形成した本発明のローラー(試料1〜3)で
は、汚れの付着が無く、耐薬品性にも優れ、且つ表面の
硬度が高いため耐摩耗性及び耐受傷性にも優れているこ
とが判る。又、本発明で用いる高結晶性ポリプロピレン
は90°以上の大きな接触角にも拘らず、優れた保水性
を示し、現像ムラを発生させることがない。
On the other hand, the rollers (Samples 1 to 3) of the present invention in which the resin layer is made of highly crystalline polypropylene are free from stains, have excellent chemical resistance, and have high surface hardness. It can be seen that it is also excellent in wear resistance and scratch resistance. Further, the highly crystalline polypropylene used in the present invention exhibits excellent water retention and does not cause uneven development, despite a large contact angle of 90 ° or more.

【0033】実施例2 樹脂層の主成分となる樹脂は全てポリプロピレンで、分
子内立体規則性(NMR)が表3に示すように0.97
又は0.95の2種類とした。この各ポリプロピレンを
実施例1と同様に外径16mmのアルミニウム製の補強
パイプの外周に押出成形して肉厚2mmの樹脂層を形成
し、直径20mmのローラーをそれぞれ作製した。各試
料のローラーの表面粗さを、表3に示すごとく変化させ
た。
Example 2 The resin which is the main component of the resin layer is polypropylene, and its intramolecular stereoregularity (NMR) is 0.97 as shown in Table 3.
Or 0.95. Similar to Example 1, each polypropylene was extruded on the outer circumference of an aluminum reinforced pipe having an outer diameter of 16 mm to form a resin layer having a thickness of 2 mm, and rollers each having a diameter of 20 mm were produced. The surface roughness of the roller of each sample was changed as shown in Table 3.

【0034】得られた各ローラーについて、実施例1と
同様に耐汚れ付着性、保水性を評価し、更に得られた写
真の画質から現像性を評価し、結果を表3に併せて示し
た。尚、耐汚れ付着性、保水性、現像性の評価における
記号は、それぞれ◎が極めて良好、○が良好、△が使用
可能、×が不良を意味する。
With respect to each of the obtained rollers, the stain resistance and water retention were evaluated in the same manner as in Example 1, and the developability was evaluated from the image quality of the obtained photograph, and the results are also shown in Table 3. . In the evaluation of stain resistance, water retention, and developability, the symbol ⊚ means extremely good, ◯ means good, Δ means usable, and x means bad.

【0035】[0035]

【表3】試料 樹脂層NMR Ra Rmax 耐汚れ 保水性 現像性(画質) 10 0.97 0.4 4.0 ◎ ○ ○ 11 0.95 0.4 4.0 ○ ○ ○ 12 0.97 0.1 1.7 ◎ △ △〜○(現像ムラ) 13 0.95 0.1 1.5 ◎ △ △〜○(現像ムラ) 14 0.97 0.2 1.9 ◎ △〜○ ○ 15 0.95 0.2 2.4 ○ △〜○ ○ 16 0.97 0.5 5.3 ◎ ○ △〜○(砂地ムラ) 17 0.95 0.5 5.8 ○ ○ △〜○(砂地ムラ) 18 0.97 0.6 6.6 ◎ ○ △(砂地ムラ) 19 0.95 0.6 6.8 ○ ○ △(砂地ムラ) (注)表中の樹脂層NMRは樹脂層の立体規則性を表す。又、試料12と13に は若干の現像ムラ発生傾向が、及び試料16〜19には若干の砂地ムラ発生傾向 が認められた。[Table 3] Sample resin layer NMR Ra Rmax Stain resistance Water retention developability (image quality ) 10 0.97 0.4 4.0 ◎ ○ ○ 11 0.95 0.4 4.0 ○ ○ ○ 12 0.97 0.1 1.7 ◎ △ △ to ○ (uneven development) 13 0.95 0.1 1.5 ◎ △ △ ~ ○ (Development unevenness) 14 0.97 0.2 1.9 ◎ △ ~ ○ ○ 15 0.95 0.2 2.4 ○ △ ~ ○ ○ 16 0.97 0.5 5.3 ◎ ○ △ ~ ○ (Sandy surface unevenness) 17 0.95 0.5 5.8 ○ ○ △ ~ ○ ( Sandy surface unevenness) 18 0.97 0.6 6.6 ◎ ○ △ (Sandy surface unevenness) 19 0.95 0.6 6.8 ○ ○ △ (Sandy surface unevenness) (Note) The resin layer NMR in the table indicates the stereoregularity of the resin layer. In addition, a slight tendency of development unevenness was found in Samples 12 and 13, and a slight tendency of uneven sandy land was found in Samples 16-19.

【0036】以上の結果より、高結晶性ポリプロピレン
のローラーでは、その表面粗さがRaで0.1〜0.6μ
m及びRmaxで1〜7μmの範囲にあるとき好ましい結
果が得られ、特にRaで0.2〜0.5μm及びRmaxで2
〜6μmの範囲が最適であることが判った。尚、耐汚れ
付着性については、RaとRmaxが上記範囲にあれば、表
面粗さには殆ど関係が無いことも判った。
From the above results, the surface roughness Ra of the highly crystalline polypropylene roller is 0.1 to 0.6 μm.
When m and Rmax are in the range of 1 to 7 μm, preferable results are obtained, and particularly Ra is 0.2 to 0.5 μm and Rmax is 2
It has been found that a range of ˜6 μm is optimal. It was also found that the stain resistance has little relation to the surface roughness if Ra and Rmax are in the above ranges.

【0037】又、軸端をポリプロピレンで作製し、前記
ポリプロピレンの各樹脂層との接着性を試験したとこ
ろ、接着剤により樹脂層と軸端を接着した場合には初期
的には使用可能なレベルであったが、連続使用すると剥
離が発生した。これに対して、樹脂層と軸端を高周波溶
着により接続した場合、長期間連続使用しても剥離等が
なく、極めて接着性に優れることが確認された。
Further, when the shaft end was made of polypropylene and the adhesiveness between the polypropylene and each resin layer was tested, when the resin layer and the shaft end were bonded with an adhesive, the level was initially usable. However, peeling occurred after continuous use. On the other hand, it was confirmed that when the resin layer and the shaft end were connected by high frequency welding, peeling did not occur even after continuous use for a long period of time, and the adhesiveness was extremely excellent.

【0038】[0038]

【発明の効果】本発明によれば、自動現像機用のローラ
ーの樹脂層として、高結晶性で且つ従来より高い接触角
を有するポリプロピレンをを使用することにより、その
表面粗さの適正化と相俟って、現像液や定着液などに長
時間浸漬して使用してもローラー表面に汚れの付着が殆
ど無く、従って恒久的にローラーのメンテナンス回数を
低減することができる。
According to the present invention, the use of polypropylene having a high crystallinity and a higher contact angle than conventional ones as a resin layer of a roller for an automatic developing machine allows the surface roughness to be optimized. Together, there is almost no stain on the roller surface even when the roller is soaked in a developing solution or a fixing solution for a long time, and therefore the number of times of maintenance of the roller can be permanently reduced.

【0039】又、ローラーの樹脂層として高結晶性のポ
リプロピレンを使用しているため、耐薬品性に優れると
共にローラーの剛性及び耐熱性に優れているうえ、表面
硬度も高いのでローラー表面に傷等が付きにくく、従っ
て表面の摩耗による荒れも発生しにくい。しかも、その
樹脂層表面が粗面化されているため、良好な保水性を有
し、優れた現像性を保持できる。
Further, since highly crystalline polypropylene is used as the resin layer of the roller, the roller surface is excellent in chemical resistance and the rigidity and heat resistance of the roller, and the surface hardness is high, so that the roller surface is not damaged. It is hard to get scratches, so that the surface is less likely to be roughened due to wear. Moreover, since the surface of the resin layer is roughened, it has good water retention and can maintain excellent developability.

【0040】更に、樹脂層と軸端を高周波にて溶着する
ことにより、気密性及び接着力が非常に高くなり、長時
間浸漬して使用しても、剥離その他のローラーの機能が
損なわれるような欠陥の発生がない。
Further, by welding the resin layer and the shaft end at a high frequency, the airtightness and the adhesive force become very high, and peeling and other roller functions are impaired even when used for a long time. There are no major defects.

【0041】従って、本発明の自動現像機用ローラー
は、良好な現像性を発揮すると共に、好ましい表面状態
を長期に渡って維持することができる。しかも、高結晶
性のポリプロピレンの樹脂層を用いるので、従来の熱硬
化性樹脂を用いる場合に比べ安価であり、且つその高い
剛性と成形性の向上により、樹脂層の薄肉化によるコス
トの低減が可能である。
Therefore, the roller for an automatic processor of the present invention can exhibit good developability and can maintain a preferable surface condition for a long period of time. Moreover, since a highly crystalline polypropylene resin layer is used, it is cheaper than the case of using a conventional thermosetting resin, and due to its high rigidity and improved moldability, the cost can be reduced by thinning the resin layer. It is possible.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の自動現像機用ローラーの一具体例を示
した概略の断面図である。
FIG. 1 is a schematic sectional view showing a specific example of a roller for an automatic processor according to the present invention.

【図2】ローラーの保水性を評価するのに用いた簡易試
験機の概略図である。
FIG. 2 is a schematic view of a simple tester used to evaluate water retention of a roller.

【符号の説明】[Explanation of symbols]

1 樹脂層 2 補強芯材 3 軸端 4 軸芯 5 ローラー 6 液面 1 Resin Layer 2 Reinforcement Core Material 3 Shaft End 4 Shaft Core 5 Roller 6 Liquid Level

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 円筒状又は円柱状の補強芯材の外周に、
核磁気共鳴法により定量した分子内立体規則性が0.9
4以上且つ蒸留水による接触角が90°〜130°の範
囲にあるポリプロピレンからなり、表面が粗面化されて
いる樹脂層を有することを特徴とする自動現像機用ロー
ラー。
1. A cylindrical or cylindrical reinforcing core material is provided on the outer periphery of the reinforcing core material.
Intramolecular stereoregularity determined by nuclear magnetic resonance is 0.9
A roller for an automatic developing machine, comprising a polypropylene layer having a contact angle of 4 or more and distilled water in the range of 90 ° to 130 ° and having a roughened surface.
【請求項2】 前記樹脂層の表面が、研磨仕上げ又はバ
フ仕上げにより粗面化されていることを特徴とする、請
求項1に記載の自動現像機用ローラー。
2. The roller for an automatic processor according to claim 1, wherein the surface of the resin layer is roughened by polishing or buffing.
【請求項3】 前記樹脂層の表面粗さが、中心線平均粗
さRaで0.1〜0.6μm、及び最大高さ粗さRmaxで1
〜7μmの範囲にあることを特徴とする、請求項1又は
2に記載の自動現像機用ローラー。
3. The surface roughness of the resin layer is 0.1 to 0.6 μm in centerline average roughness Ra and 1 in maximum height roughness Rmax.
The roller for an automatic processor according to claim 1 or 2, wherein the roller is in a range of from about 7 µm.
【請求項4】 前記樹脂層の両端部に、ポリプロピレン
からなる軸端が高周波溶着されていることを特徴とす
る、請求項1〜3のいずれかに記載の自動現像機用ロー
ラー。
4. The roller for an automatic processor according to claim 1, wherein a shaft end made of polypropylene is welded to both ends of the resin layer by high frequency welding.
JP16500395A 1995-06-30 1995-06-30 Roller for automatic developing machine Expired - Fee Related JP3376767B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16500395A JP3376767B2 (en) 1995-06-30 1995-06-30 Roller for automatic developing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16500395A JP3376767B2 (en) 1995-06-30 1995-06-30 Roller for automatic developing machine

Publications (2)

Publication Number Publication Date
JPH0915814A true JPH0915814A (en) 1997-01-17
JP3376767B2 JP3376767B2 (en) 2003-02-10

Family

ID=15804002

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16500395A Expired - Fee Related JP3376767B2 (en) 1995-06-30 1995-06-30 Roller for automatic developing machine

Country Status (1)

Country Link
JP (1) JP3376767B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007205216A (en) * 2006-02-01 2007-08-16 Nikki Co Ltd Injector valve of injector for gaseous fuel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007205216A (en) * 2006-02-01 2007-08-16 Nikki Co Ltd Injector valve of injector for gaseous fuel

Also Published As

Publication number Publication date
JP3376767B2 (en) 2003-02-10

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