JPS6135545B2 - - Google Patents
Info
- Publication number
- JPS6135545B2 JPS6135545B2 JP51082048A JP8204876A JPS6135545B2 JP S6135545 B2 JPS6135545 B2 JP S6135545B2 JP 51082048 A JP51082048 A JP 51082048A JP 8204876 A JP8204876 A JP 8204876A JP S6135545 B2 JPS6135545 B2 JP S6135545B2
- Authority
- JP
- Japan
- Prior art keywords
- porosity
- photosensitive
- photosensitive layer
- transfers
- repeated
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 24
- 238000012546 transfer Methods 0.000 claims description 20
- 239000011230 binding agent Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 230000007423 decrease Effects 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/005—Materials for treating the recording members, e.g. for cleaning, reactivating, polishing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
- G03G5/05—Organic bonding materials; Methods for coating a substrate with a photoconductive layer; Inert supplements for use in photoconductive layers
- G03G5/0525—Coating methods
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
- G03G5/08—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being inorganic
- G03G5/087—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being inorganic and being incorporated in an organic bonding material
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Photoreceptors In Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は転写型感光材料の製造方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a transfer type photosensitive material.
一般に複写画像の形成に供される電子写真感光
材料、オフセツト印刷に供されるオフセツトマス
ター等の転写型画像形成材料としては、現在光導
電性物質の粉末をバインダー樹脂中に分散せしめ
て成る感光層を有する感光材料が広く用いられて
いる。然るに従来この種の感光層を有する感光材
料においては感光層の組成によつても左右される
が通常耐久性が低くて繰り返し転写に用いた場合
の寿命が短く、繰り返し転写可能回数が小さい欠
点がある。 Generally, transfer-type image forming materials such as electrophotographic photosensitive materials used for forming copied images and offset masters used for offset printing are currently photosensitive materials made by dispersing photoconductive substance powder in a binder resin. Photosensitive materials having layers are widely used. However, conventional photosensitive materials having this type of photosensitive layer usually have low durability and have a short lifespan when used for repeated transfers, although this also depends on the composition of the photosensitive layer, and the disadvantage is that the number of repeatable transfers is small. be.
本発明者等はこの欠点について研究を重ねた結
果、従来の感光材料における感光層の気孔率が当
該感光材料の繰り返し転写における耐久性と密接
な関係があることを見出し、本発明を完成したも
のである。ここに前記気孔率とは、感光層の全体
積に対する当該感光層中の空隙の体積の割合であ
つて、斯かる空隙は感光層の製造においてバイン
ダー樹脂溶液中に光導電性物質の粉前を分散せし
める際に混入する気泡或るいはバインダー樹脂溶
液の形成に用いた溶剤を乾燥除去せしめる際に形
成される空洞等によるものであり、従来の感光材
料における感光層の気孔率は50％以上である。 As a result of repeated research on this drawback, the present inventors discovered that the porosity of the photosensitive layer in conventional photosensitive materials is closely related to the durability of the photosensitive material in repeated transfers, and thus completed the present invention. It is. The above-mentioned porosity is the ratio of the volume of voids in the photosensitive layer to the total volume of the photosensitive layer, and such voids are caused by the presence of photoconductive material powder in the binder resin solution during the production of the photosensitive layer. This is due to air bubbles mixed in during dispersion or cavities formed when the solvent used to form the binder resin solution is dried and removed.The porosity of the photosensitive layer in conventional photosensitive materials is 50% or more. be.
本発明の目的は、繰り返し転写における耐久性
が大きく、従つて繰り返し転写可能回数が大きい
ものを提供するにある。 An object of the present invention is to provide a material that has high durability in repeated transfers and can therefore be repeatedly transferred a large number of times.
斯かる目的を達成するため、本発明において
は、光導電性物質とバインダー樹脂とを含有する
感光層の気孔率が40％以下の転写型感光材料を得
るようにする。勿論前記感光層は必要に応じて増
〓〓〓〓〓
感色素、塗膜性改良剤等を更に含有するものであ
つてもよい。そしてその気孔率が40％以下の前記
感光層を得るためには、バインダー樹脂溶液中に
光導電性物質を分散せしめて得られる感光液を導
電性支持体上に塗布し乾燥せしめ、この感光液を
塗布乾燥を複数回繰り返すことによつて所定厚さ
の感光層を形成せしめる。 In order to achieve this object, in the present invention, a transfer type photosensitive material is obtained in which the photosensitive layer containing a photoconductive substance and a binder resin has a porosity of 40% or less. Of course, the number of photosensitive layers may be increased as necessary.
It may further contain a sensitive dye, a coating property improver, etc. In order to obtain the photosensitive layer with a porosity of 40% or less, a photosensitive solution obtained by dispersing a photoconductive substance in a binder resin solution is applied onto a conductive support and dried. By repeating coating and drying several times, a photosensitive layer of a predetermined thickness is formed.
本発明方法により気孔率の低い感光層が得られ
る理由は、感光液の塗膜の厚さが大きいときには
当該塗膜の表面側にバインダー樹脂が浮集するよ
うになり、これを乾燥せしめるとその下層部分か
ら溶剤が蒸散するようになつて多数の空洞が形成
されるようになるが、塗膜の厚さが小さければ溶
剤が表面から蒸散するため空洞が形成されないた
めであると考えられる。 The reason why a photosensitive layer with low porosity can be obtained by the method of the present invention is that when the coating film of the photosensitive liquid is thick, the binder resin floats on the surface side of the coating film, and when this is dried, Many cavities are formed as the solvent evaporates from the lower layer, but this is thought to be because if the thickness of the coating film is small, the solvent evaporates from the surface and no cavities are formed.
以下本発明の実施例について説明するが、これ
らの実施例において気孔率の測定は水銀圧入式ポ
ロシメーターを用いて行つた。 Examples of the present invention will be described below. In these examples, porosity was measured using a mercury intrusion porosimeter.
実施例 １
酸化亜鉛微粉末 100ｇ
アクリル樹脂の50％トルエン溶液 40ｇ
メラミン樹脂の50％トルエン溶液 10ｇ
ローズベンガルの１％メタノール溶液 ８ｇ
トルエン 100c.c.
以上の物質をボールミルにより60分間分散せし
めて得られた感光液を導電性支持体上に乾燥後の
膜厚が10μとなるよう塗布乾燥せしめた後温度
100℃で３時間熱処理を行い、斯くして形成され
た感光膜上に全く同様にして前記感光液の塗布、
乾燥及び熱処理を行い、２層の感光膜が結合され
て成る気孔率が35％の感光材料を作成し、試料と
した。Example 1 Zinc oxide fine powder 100g Acrylic resin 50% toluene solution 40g Melamine resin 50% toluene solution 10g Rose Bengal 1% methanol solution 8g Toluene 100c.c. Obtained by dispersing the above substances in a ball mill for 60 minutes. The photosensitive liquid was coated on a conductive support so that the film thickness after drying was 10μ, and the temperature was
Heat treatment was performed at 100° C. for 3 hours, and the photosensitive liquid was applied in exactly the same manner on the photoresist film thus formed.
After drying and heat treatment, a photosensitive material with a porosity of 35% consisting of two layers of photosensitive films bonded together was prepared and used as a sample.
一方前記感光液を乾燥後の厚さが20μとなるよ
う一回だけ塗布乾燥し、同様の条件下で熱処理を
施して感光材料を作成し、比較試料とした。この
比較試料の感光層の気孔率は55％であつた。 On the other hand, the photosensitive solution was coated and dried only once so that the thickness after drying was 20 μm, and heat treatment was performed under the same conditions to prepare a photosensitive material, which was used as a comparison sample. The porosity of the photosensitive layer of this comparative sample was 55%.
得られた試料及び比較試料について反復転写式
電子複写機により繰り返し複写テストを行い、複
写第１回の画像と複写第4000回の画像とにおける
最高画像濃度Dmax、D′maxを測定したところ、
試料についてはDmax＝1.2、D′max＝0.8であ
り、4000回の転写における画像濃度の低下が僅か
であつたが、比較試料についてはDmax＝1.1、
D′max＝0.3と画像濃度の低下が大きかつた。 Repeated copying tests were performed on the obtained samples and comparative samples using a repeating transfer type electronic copying machine, and the maximum image densities Dmax and D'max of the first image and the 4000th image were measured.
For the sample, Dmax = 1.2 and D'max = 0.8, and there was a slight decrease in image density after 4000 transfers, but for the comparison sample, Dmax = 1.1,
D'max=0.3, which resulted in a large decrease in image density.
実施例 ２
従来及び本発明の方法により気孔率が夫々55
％、40％、35％、30％及び25％の感光層を有する
感光材料５枚を作成した。これらの感光材料を用
いて同一の条件下で繰り返し複写テストを行い、
複写画像における最高画像濃度が1.00より小さく
なる迄に行われた転写回数を各感光材料について
求めたところ、夫々約600回、約1000回、約1500
回、約2500回及び約4500回であつて、気孔率と転
写回数との関係は図の曲線で示すようになる。Example 2 The porosity was 55 by the conventional method and the method of the present invention, respectively.
%, 40%, 35%, 30% and 25% photosensitive materials were prepared. Repeated copying tests were conducted using these photosensitive materials under the same conditions.
When we calculated the number of transfers performed for each photosensitive material until the maximum image density of the copied image became less than 1.00, we found that it was approximately 600 times, approximately 1000 times, and approximately 1500 times, respectively.
times, about 2,500 times, and about 4,500 times, and the relationship between the porosity and the number of transfers is shown by the curve in the figure.
以上の結果を総合すると、感光材料の感光層の
気孔率を40％以下に低下せしめることによつて繰
り返し転写に供したときの感光材料の耐久性を大
きく向上せしめることができ、劣化が遅くて使用
寿命即ち転写可能回数を大きく増大せしめること
ができる。これは前記気孔率が大きいときは、空
隙部における帯電特性が繰り返し転写開始直後に
おいては一応十分であるが転写を繰り返すに伴つ
て劣化が促進されるようになるのに対し、気孔率
が小さければ空隙部における劣化が全体の及ぼす
影響が小さい上、絶縁破壊が生じ難くなるためで
あると考えられ、事実気孔率が小さい感光層を有
する感光材料を用いて形成せしめた画像は、気孔
率が大きい場合のものに比して画像濃度のみでな
く画質の荒れの点でも優れていた。又実施例２の
結果を示す図から容易に判断されるように、前記
気孔率の低下に伴う転写回数の増加の割合は気孔
率が40％以下であれば顕著に確実に認められる。
即ち従来の気孔率は大略50％以上であるから、気
孔率を少なくとも10％、好ましくは15％以下低下
せしめればよい。 Combining the above results, by reducing the porosity of the photosensitive layer of a photosensitive material to 40% or less, the durability of the photosensitive material when subjected to repeated transfers can be greatly improved, and deterioration is slow. The service life, that is, the number of times that transfer is possible can be greatly increased. This is because when the porosity is large, the charging characteristics in the voids are sufficient immediately after the start of repeated transfer, but deterioration accelerates as the transfer is repeated, whereas when the porosity is small, This is thought to be because the overall effect of deterioration in the voids is small and dielectric breakdown is less likely to occur; in fact, images formed using a photosensitive material having a photosensitive layer with a small porosity have a large porosity. Compared to the original case, it was superior not only in image density but also in terms of image quality. Furthermore, as can be easily determined from the graph showing the results of Example 2, the rate of increase in the number of transfers due to the decrease in porosity is significantly and reliably observed when the porosity is 40% or less.
That is, since the conventional porosity is approximately 50% or more, it is sufficient to reduce the porosity by at least 10%, preferably by 15% or less.
このように感光層の気孔率が40％以下であり、
しかも小さい程繰り返し転写における耐久性が増
大するが、気孔率が10％未満となると形成される
画像にカブリが生ずるようになつて好ましくな
い。実用上は25〜35％の範囲内とすることが、製
造の面からも、有利である。 In this way, the porosity of the photosensitive layer is 40% or less,
Moreover, the smaller the porosity, the higher the durability in repeated transfers, but if the porosity is less than 10%, fogging will occur in the formed image, which is not preferable. Practically speaking, it is advantageous to keep the content within the range of 25 to 35% from the viewpoint of manufacturing.
以上詳述したように本発明方法によれば極めて
簡単に繰り返し転写における耐久性が優れ、転写
可能回数が増大する上画質の優れた画像を形成す
ることができ、電子写真は又はオフセツト印刷等
に好適な感光材料を提供することができる利益が
ある。 As detailed above, according to the method of the present invention, it is possible to extremely easily form an image with excellent durability in repeated transfer, an increase in the number of possible transfers, and an excellent image quality. There is an advantage in that a suitable photosensitive material can be provided.
〓〓〓〓〓
〓〓〓〓〓
図は感光材料の感光層の気孔率と、当該感光材
料により得られる画像の濃度が一定値に低下する
迄の転写回数との関係を示す曲線図である。
〓〓〓〓〓
The figure is a curve diagram showing the relationship between the porosity of the photosensitive layer of a photosensitive material and the number of transfers until the density of an image obtained with the photosensitive material decreases to a constant value. 〓〓〓〓〓
Claims (1)
せしめて得た感光液を導電性支持体上に塗布乾燥
する工程を複数回繰り返すことによつてその気孔
率が40％以下である感光層を形成したことを特徴
とする転写型感光材料の製造方法。1. A photosensitive layer having a porosity of 40% or less is formed by repeating the process of coating and drying a photosensitive liquid obtained by dispersing a photoconductive substance in a binder resin solution on a conductive support several times. A method for producing a transfer type photosensitive material, characterized in that:
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8204876A JPS538140A (en) | 1976-07-12 | 1976-07-12 | Transfer type light sensitive material |
| GB2750277A GB1561519A (en) | 1976-07-12 | 1977-06-30 | Method of making an electrophotographic photosensitive material |
| FR7721554A FR2358689A1 (en) | 1976-07-12 | 1977-07-12 | PHOTOSENSITIVE-TYPE INFORMATION TRANSFER MATERIAL |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8204876A JPS538140A (en) | 1976-07-12 | 1976-07-12 | Transfer type light sensitive material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS538140A JPS538140A (en) | 1978-01-25 |
| JPS6135545B2 true JPS6135545B2 (en) | 1986-08-13 |
Family
ID=13763613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8204876A Granted JPS538140A (en) | 1976-07-12 | 1976-07-12 | Transfer type light sensitive material |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS538140A (en) |
| FR (1) | FR2358689A1 (en) |
| GB (1) | GB1561519A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63501120A (en) * | 1985-10-16 | 1988-04-21 | サンドストランド・コ−ポレ−ション | Permanent magnet rotor assembly |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63262655A (en) * | 1987-04-21 | 1988-10-28 | Koichi Kinoshita | Photosensitive body |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50120837A (en) * | 1974-03-09 | 1975-09-22 | ||
| JPS50161242A (en) * | 1974-06-18 | 1975-12-27 | ||
| JPS516557A (en) * | 1974-07-04 | 1976-01-20 | Matsushita Electric Ind Co Ltd | DENSHISHASHINKANKOBANNO SEIZOHO |
-
1976
- 1976-07-12 JP JP8204876A patent/JPS538140A/en active Granted
-
1977
- 1977-06-30 GB GB2750277A patent/GB1561519A/en not_active Expired
- 1977-07-12 FR FR7721554A patent/FR2358689A1/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50120837A (en) * | 1974-03-09 | 1975-09-22 | ||
| JPS50161242A (en) * | 1974-06-18 | 1975-12-27 | ||
| JPS516557A (en) * | 1974-07-04 | 1976-01-20 | Matsushita Electric Ind Co Ltd | DENSHISHASHINKANKOBANNO SEIZOHO |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63501120A (en) * | 1985-10-16 | 1988-04-21 | サンドストランド・コ−ポレ−ション | Permanent magnet rotor assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS538140A (en) | 1978-01-25 |
| FR2358689A1 (en) | 1978-02-10 |
| GB1561519A (en) | 1980-02-20 |
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