JPH0359428B2 - - Google Patents
Info
- Publication number
- JPH0359428B2 JPH0359428B2 JP18370384A JP18370384A JPH0359428B2 JP H0359428 B2 JPH0359428 B2 JP H0359428B2 JP 18370384 A JP18370384 A JP 18370384A JP 18370384 A JP18370384 A JP 18370384A JP H0359428 B2 JPH0359428 B2 JP H0359428B2
- Authority
- JP
- Japan
- Prior art keywords
- protective layer
- surface protective
- photoreceptor
- weight
- parts
- 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
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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 or to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/14—Inert intermediate or cover layers for charge-receiving layers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photoreceptors In Electrophotography (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電子写真用感光体、更に詳しくは光導
電層の表面に保護層を有する電子写真用感光体に
おける上記表面保護層の改良に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electrophotographic photoreceptor, and more particularly to an improvement in the surface protective layer of an electrophotographic photoreceptor having a protective layer on the surface of a photoconductive layer. It is.
帯電、露光、現像、転写、クリーニング等のプ
ロセスを含む電子写真方式において用いられる感
光体としては、例えば米国特許第2297619号にも
開示されているように多くのものが実用化されて
いる。例えば適当な導電性基板上に有機光導電材
料を塗布あるいは蒸着などにより直接設けたも
の、あるいは上記材料を適当な有機バインダーと
ともに設けたもの、あるいはバインダー中に
ZnO、CdS、TiO2等の無機光導電材料を分散さ
せたもの、あるいは無定形セレン又はその合金な
どを蒸着したものなどが用いられている（例えば
特公昭45−5394号、特公昭46−3005号、特公昭49
−14271号公報参照）。
Many photoreceptors have been put into practical use as photoreceptors used in electrophotography including processes such as charging, exposure, development, transfer, and cleaning, as disclosed in, for example, US Pat. No. 2,297,619. For example, an organic photoconductive material is provided directly on a suitable conductive substrate by coating or vapor deposition, or the above material is provided together with a suitable organic binder, or in a binder.
Products in which inorganic photoconductive materials such as ZnO, CdS, and TiO 2 are dispersed, or materials in which amorphous selenium or its alloys are vapor-deposited are used (for example, JP-B No. 45-5394, JP-B No. 46-3005). No., Special Publication 1977
-Refer to Publication No. 14271).
これらの感光体における表面層は、電子写真複
写装置内での繰り返し使用において機械的、電気
的及び化学的ストレスを絶えず受ける事になる。
このためこれら感光体表面の損傷を防ぎ、寿命を
高めるため感光体表面に表面保護層を設ける事が
種々提案されている。これら表面保護層の１つと
してフエノール樹脂、エポキシ樹脂、アルキド樹
脂などの熱硬化性樹脂を含む層を用い、これに適
当な導電性を付与し、カールソンプロセスに用い
た電子写真感光体では、表面硬度及び耐摩耗性の
面で優れた改善効果が見い出されている。しかし
ながら上記熱硬化性樹脂を表面保護層として例え
ばシート状の感光体上に被膜形成した場合、被膜
としての可撓性に関し十分満足できるものが得ら
れないと言う問題を有している。 The surface layer of these photoreceptors is constantly subjected to mechanical, electrical, and chemical stress during repeated use within an electrophotographic copying apparatus.
For this reason, various proposals have been made to provide a surface protective layer on the surface of the photoreceptor in order to prevent damage to the surface of the photoreceptor and extend its life. A layer containing a thermosetting resin such as a phenolic resin, an epoxy resin, or an alkyd resin is used as one of these surface protective layers, and this is given appropriate conductivity. Excellent improvement effects have been found in terms of hardness and wear resistance. However, when the above-mentioned thermosetting resin is used as a surface protective layer to form a coating on, for example, a sheet-like photoreceptor, there is a problem in that a sufficiently satisfactory coating cannot be obtained in terms of flexibility.
本発明の目的はこのような問題を確実に除去す
る事のできる電子写真用感光体を提供する事にあ
る。
An object of the present invention is to provide an electrophotographic photoreceptor that can reliably eliminate such problems.
本発明者は種々検討の結果、熱硬化性樹脂、更
に詳しくはポリオール硬化型ポリウレタン樹脂中
に、可撓性補助剤として、メチルメタアクリレー
ト、スチレン、及び２−エチルヘキシルアクリレ
ートから成る共重合体化合物を適当量含有させる
事により、上記熱硬化性樹脂本来の優れた表面硬
度及び耐摩耗性を何ら損なう事なく極めて優れた
可撓性を有し、且つ電子写真特性に関しても極め
て良好な性能を有する表面保護層を電子写真感光
体上に被膜形成し得る事を見い出した。
As a result of various studies, the present inventors added a copolymer compound consisting of methyl methacrylate, styrene, and 2-ethylhexyl acrylate as a flexibility auxiliary agent to a thermosetting resin, more specifically, a polyol-curable polyurethane resin. By containing the thermosetting resin in an appropriate amount, it is possible to obtain a surface that has extremely excellent flexibility without impairing the excellent surface hardness and abrasion resistance inherent to the above-mentioned thermosetting resin, and also has extremely good performance in terms of electrophotographic properties. It has been found that a protective layer can be formed on an electrophotographic photoreceptor.
すなわち本発明は、導電性基板上に光導電層及
び表面保護層を順次積層して成る電子写真用感光
体において、上記表面保護層が、ポリオール硬化
型ポリウレタン樹脂から成り、該樹脂中にメチル
メタアクリレート、スチレン及び２−エチルヘキ
シルアクリレートから成る共重合体化合物を含有
させたことを特徴とする電子写真用感光体。 That is, the present invention provides an electrophotographic photoreceptor comprising a photoconductive layer and a surface protective layer sequentially laminated on a conductive substrate, wherein the surface protective layer is made of a polyol-curable polyurethane resin, and methyl methane is contained in the resin. An electrophotographic photoreceptor comprising a copolymer compound consisting of acrylate, styrene, and 2-ethylhexyl acrylate.
本発明において用いられる光導電体には、例え
ば適当な導電性基板上に無定形セレン又はその合
金などを蒸着したもの、あるいはバインダー中に
ZnO、CdS、TiO2などの無機光導電材料を分散
させたもの、あるいは有機光導電体として例えば
ポリ−Ｎ−ビニルカルバゾール（PVK）、PVK
と２，４，７−トリニトロフルオレノンとの電荷
移動型錯体、フタロシアニンなどの顔料をバイン
ダー中に分散させた光導電体、電荷発生層と電荷
移動層を積層させた機能分離型光導電体などが含
まれる。 The photoconductor used in the present invention includes, for example, amorphous selenium or its alloy deposited on a suitable conductive substrate, or in a binder.
Dispersed inorganic photoconductive materials such as ZnO, CdS, TiO 2 or organic photoconductors such as poly-N-vinylcarbazole (PVK), PVK
and 2,4,7-trinitrofluorenone, a photoconductor in which a pigment such as phthalocyanine is dispersed in a binder, a functionally separated photoconductor in which a charge generation layer and a charge transfer layer are laminated, etc. is included.
本発明において用いられる表面保護層としては
特開昭57−30846号公報に開示されているような、
金属酸化物を種々の熱硬化性樹脂中に分散させた
ものがあるが、熱硬化性樹脂としてはポリエーテ
ルポリオール硬化型、ポリエステルポリオール硬
化型、アクリルポリオール硬化型のポリウレタン
樹脂を用いる。 As the surface protective layer used in the present invention, as disclosed in Japanese Patent Application Laid-Open No. 57-30846,
There are various types of thermosetting resins in which metal oxides are dispersed, and as the thermosetting resin, polyurethane resins of polyether polyol-curing type, polyester polyol-curing type, and acrylic polyol-curing type are used.
本発明は上記熱硬化性樹脂中に可撓性補助剤と
してメチルメタアクリレート、スチレン、及び２
−エチルヘキシルアクリレートから成る共重合体
化合物を含有させたことを特徴とするものであ
り、この共重合体化合物の組成比はメチルメタア
クリレート20〜60重量部、スチレン10〜30重量
部、２−エチルヘキシルアクリレート10〜70重量
部の範囲が適当である。 The present invention includes methyl methacrylate, styrene, and 2 as flexibility adjuvants in the thermosetting resin.
- It is characterized by containing a copolymer compound consisting of ethylhexyl acrylate, and the composition ratio of this copolymer compound is 20 to 60 parts by weight of methyl methacrylate, 10 to 30 parts by weight of styrene, and 2-ethylhexyl. A range of 10 to 70 parts by weight of acrylate is suitable.
また上記共重合体化合物の上記ポリオール硬化
型ポリウレタン樹脂への含有量は0.1〜50重量部
が適当であり、２〜30重量部の含有量において表
面保護層として電子写真用感光体上に被膜形成し
た場合に特にその効果が著しい。 The content of the copolymer compound in the polyol-curable polyurethane resin is suitably 0.1 to 50 parts by weight, and at a content of 2 to 30 parts by weight, a film is formed on the electrophotographic photoreceptor as a surface protective layer. The effect is especially remarkable when
以下、本発明を実施例により説明する。 The present invention will be explained below using examples.
実施例 １
ポリエステルフイルム上にアルミニウムを蒸着
させた支持体にダイアンブルー（CI21180）をテ
トラヒドロフラン中に分散させた分散液を塗布
し、厚さ0.5μの電荷発生層を形成した。この上に
構造式(1)で示されるヒドラゾン２重量部、ポリカ
ーボネート樹脂３重量部をテトラヒドロフランに
溶解させた溶液を塗布して厚さ15μの電荷輸送層
を形成した。Example 1 A dispersion of Diane Blue (CI21180) in tetrahydrofuran was applied to a support made of polyester film on which aluminum was vapor-deposited to form a charge generation layer with a thickness of 0.5 μm. A solution prepared by dissolving 2 parts by weight of hydrazone represented by structural formula (1) and 3 parts by weight of polycarbonate resin in tetrahydrofuran was applied onto this to form a charge transport layer having a thickness of 15 μm.
構造式(1)
さらにこの上に、粒径0.1μ以下の酸化スズ35重
量部を、ポリエステルポリオール硬化型樹脂（関
西ペイント社製、レタン2000）65重量部および共
重合体化合物（メチルメタアクリレート50重量
部、スチレン30重量部、２−エチルヘキシルアク
リレート20重量部）（日本ゼオン、TR−0625）
10重量部中に分散させた後、デイツピングによ
り、乾燥後の膜厚が2μとなるように表面保護層
を塗布した。このようにして得られた表面保護層
を有する電子写真用感光体を、富士ゼロツクス株
式会社製FX−1075に装着し、画像出しを150000
回繰り返した。その結果、画像出し150000回後に
おいても表面保護層の摩耗劣化はまつたく観察さ
れなかつた。同時に表面保護層の可撓性が不足し
ている場合に引き起こされる表面保護層中の亀裂
の発生に関しても画像出し150000回を経てまつた
く発生せず、初期の画質と比較しても何んら遜色
のない極めて鮮明な画像が得られた。Structural formula (1) Furthermore, on top of this, 35 parts by weight of tin oxide with a particle size of 0.1μ or less, 65 parts by weight of polyester polyol curable resin (manufactured by Kansai Paint Co., Ltd., Rethane 2000) and copolymer compounds (50 parts by weight of methyl methacrylate, 30 parts by weight of styrene) parts by weight, 20 parts by weight of 2-ethylhexyl acrylate) (Nippon Zeon, TR-0625)
After dispersing in 10 parts by weight, a surface protective layer was applied by dipping so that the film thickness after drying was 2 μm. The electrophotographic photoreceptor having the surface protective layer thus obtained was mounted on FX-1075 manufactured by Fuji Xerox Co., Ltd., and the image output rate was 150,000.
Repeated times. As a result, no wear and tear deterioration of the surface protective layer was observed even after 150,000 images were printed. At the same time, cracks in the surface protective layer caused by insufficient flexibility of the surface protective layer did not occur even after 150,000 images, and compared to the initial image quality, there was no cracking. An extremely clear image with no inferiority was obtained.
尚、この時同時に作製された、表面保護層中に
共重合体化合物TR−0625を含まない感光体にお
いては、画像出しを20000回繰り返した後に、表
面保護層中に多数の微細な亀裂が生じ画像の著し
い劣化が観察された。 In addition, in the photoreceptor that was prepared at the same time and did not contain the copolymer compound TR-0625 in the surface protective layer, many fine cracks were generated in the surface protective layer after 20,000 image formations. Significant image deterioration was observed.
実施例 ２
実施例１のポリエステルポリオール硬化型樹脂
（関西ペイント社製、レタン2000）をアクリルポ
リオール硬化型樹脂（関西ペイント社製、レタン
4000）に変更した以外は実施例１と全く同様にし
て表面保護層を有する感光体を作製し、富士ゼロ
ツクス株式会社製FX−1075に装着して画像出し
を150000回繰り返した。その結果、画像出し
150000回後においても表面保護層の摩耗劣化は全
く観察されなかつた。同時に表面保護層の可撓性
が不足している場合に引き起こされる表面保護層
中の亀裂の発生に関しても画像出し150000回を経
て全く観察されず極めて鮮明な画像が得られた。Example 2 The polyester polyol curable resin (manufactured by Kansai Paint Co., Ltd., Rethan 2000) of Example 1 was mixed with the acrylic polyol curable resin (manufactured by Kansai Paint Co., Ltd., Rethane 2000).
A photoreceptor having a surface protective layer was prepared in exactly the same manner as in Example 1 except that the photoreceptor was changed to 4000), and was mounted on FX-1075 manufactured by Fuji Xerox Co., Ltd., and image formation was repeated 150,000 times. As a result, the image
Even after 150,000 cycles, no wear and tear deterioration of the surface protective layer was observed. At the same time, regarding the occurrence of cracks in the surface protective layer caused by insufficient flexibility of the surface protective layer, no cracks were observed after 150,000 images, and extremely clear images were obtained.
尚、この時同時に作製された、表面保護層中に
共重合体化合物TR−0625を含まない感光体にお
いては、画像出しを20000回繰り返した後に、表
面保護層中に多数の微細な亀裂が生じ画像の著し
い劣化が観察された。 In addition, in the photoreceptor that was prepared at the same time and did not contain the copolymer compound TR-0625 in the surface protective layer, many fine cracks were generated in the surface protective layer after 20,000 image formations. Significant image deterioration was observed.
本発明によれば、すぐれた可撓性と表面硬度及
び耐摩耗性を有し、かつすぐれた電子写真特性を
有する表面保護層を備えた電子写真用感光体が得
られる。
According to the present invention, it is possible to obtain an electrophotographic photoreceptor having a surface protective layer having excellent flexibility, surface hardness, and abrasion resistance, and having excellent electrophotographic properties.
Claims (1)
次積層して成る電子写真用感光体において、上記
表面保護層が、ポリオール硬化型ポリウレタン樹
脂から成り、該樹脂中にメチルメタアクリレー
ト、スチレン及び２−エチルヘキシルアクリレー
トから成る共重合体化合物を含有させたことを特
徴とする電子写真用感光体。1. In an electrophotographic photoreceptor comprising a photoconductive layer and a surface protective layer laminated in sequence on a conductive substrate, the surface protective layer is made of a polyol-curable polyurethane resin, and the resin contains methyl methacrylate, styrene, and A photoreceptor for electrophotography, characterized in that it contains a copolymer compound consisting of 2-ethylhexyl acrylate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18370384A JPS6162041A (en) | 1984-09-04 | 1984-09-04 | Electrophotografic sensitive body for electrophotography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18370384A JPS6162041A (en) | 1984-09-04 | 1984-09-04 | Electrophotografic sensitive body for electrophotography |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6162041A JPS6162041A (en) | 1986-03-29 |
| JPH0359428B2 true JPH0359428B2 (en) | 1991-09-10 |
Family
ID=16140469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18370384A Granted JPS6162041A (en) | 1984-09-04 | 1984-09-04 | Electrophotografic sensitive body for electrophotography |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6162041A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2595635B2 (en) * | 1988-03-24 | 1997-04-02 | 富士電機株式会社 | Electrophotographic photoreceptor |
-
1984
- 1984-09-04 JP JP18370384A patent/JPS6162041A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6162041A (en) | 1986-03-29 |
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