JPH01176432A - Grain dispersing method - Google Patents
Grain dispersing methodInfo
- Publication number
- JPH01176432A JPH01176432A JP62335575A JP33557587A JPH01176432A JP H01176432 A JPH01176432 A JP H01176432A JP 62335575 A JP62335575 A JP 62335575A JP 33557587 A JP33557587 A JP 33557587A JP H01176432 A JPH01176432 A JP H01176432A
- Authority
- JP
- Japan
- Prior art keywords
- dispersion
- grains
- dispersing liquid
- dispersing
- flow
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 9
- 239000006185 dispersion Substances 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 230000005684 electric field Effects 0.000 claims abstract description 9
- 239000000049 pigment Substances 0.000 claims description 19
- 239000010419 fine particle Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 abstract description 7
- 238000010008 shearing Methods 0.000 abstract description 4
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 abstract description 3
- 239000002612 dispersion medium Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 28
- 108091008695 photoreceptors Proteins 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 2
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- WUPHOULIZUERAE-UHFFFAOYSA-N 3-(oxolan-2-yl)propanoic acid Chemical compound OC(=O)CCC1CCCO1 WUPHOULIZUERAE-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- FIHZWZBEAXASKA-UHFFFAOYSA-N Anthron Natural products COc1cc2Cc3cc(C)cc(O)c3C(=O)c2c(O)c1C=CC(C)C FIHZWZBEAXASKA-UHFFFAOYSA-N 0.000 description 1
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000005456 alcohol based solvent Substances 0.000 description 1
- PGEHNUUBUQTUJB-UHFFFAOYSA-N anthanthrone Chemical compound C1=CC=C2C(=O)C3=CC=C4C=CC=C5C(=O)C6=CC=C1C2=C6C3=C54 PGEHNUUBUQTUJB-UHFFFAOYSA-N 0.000 description 1
- 239000003849 aromatic solvent Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229910052980 cadmium sulfide Inorganic materials 0.000 description 1
- 239000012461 cellulose resin Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- 239000005453 ketone based solvent Substances 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 description 1
- OKYDCMQQLGECPI-UHFFFAOYSA-N thiopyrylium Chemical compound C1=CC=[S+]C=C1 OKYDCMQQLGECPI-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 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
- G03G5/02—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/05—Mixers using radiation, e.g. magnetic fields or microwaves to mix the material
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photoreceptors In Electrophotography (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、電子写真感光体の製造に当って用いる有機光
導電体粒子等の微粒子の分散方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for dispersing fine particles such as organic photoconductor particles used in the production of electrophotographic photoreceptors.
電子写真感光体は、導電性基体上に感光層を形成した基
本構造をもっている。この感光層を形成するための光導
電物質としては、従来、セレンを用いたものが一般的で
あり、その他無機光導電物質として硫化カドミウムや酸
化亜鉛等も知られている。An electrophotographic photoreceptor has a basic structure in which a photosensitive layer is formed on a conductive substrate. As a photoconductive material for forming this photosensitive layer, selenium has conventionally been commonly used, and other inorganic photoconductive materials such as cadmium sulfide and zinc oxide are also known.
しかし、近年では、有機光導電物質を用いることによっ
て、成膜性の向上を図り、塗工によって生産することに
より生産性を高める試みがなされている。However, in recent years, attempts have been made to improve film formability by using organic photoconductive substances and to increase productivity by producing by coating.
感光体を形成する場合、有機光導電顔料を溶剤を分散剤
とするとともに、必要によりさらにバインダー樹脂を添
加し、前記顔料を分散液中に分散させた後、導電性を有
する基体上に塗布している。When forming a photoreceptor, an organic photoconductive pigment is used as a solvent and a dispersant, and if necessary, a binder resin is further added, and the pigment is dispersed in a dispersion liquid, and then applied onto a conductive substrate. ing.
上記分散に当っては、特開昭５８−１９４０３６．６０
−２９７５３．６０−６１７５６．６０−１３６７４７
号公報に示されているように、サンドグラインダー、ア
トライター、ニーダ−、ボールミル等を使用することが
知られている。Regarding the above dispersion, JP-A-58-194036.60
-29753.60-61756.60-136747
As shown in the above publication, it is known to use a sand grinder, attritor, kneader, ball mill, etc.
しかし、従来通りの特にサンドグラインダーやアトライ
ター等の攪拌式ビーズミルでは、分散系内の顔料に対す
る剪断応力分布が不均一であり、殆んど剪断作用が働ら
かないデッドゾーンが存在する。また、系内の分散液の
対流は、それほど大きくなり、顔料粒子の系内循環が十
分になされていない。However, in conventional stirring bead mills such as sand grinders and attritors, the shear stress distribution on the pigment in the dispersion system is uneven, and there are dead zones where almost no shearing action occurs. Further, the convection of the dispersion liquid within the system becomes so large that the pigment particles are not sufficiently circulated within the system.
その結果、各粒子の剪断作用を受ける確率が同一になら
ず、分散終了時点で、顔料粒子の粒度分布が広くなって
しまう。粒度分布が広くなると、感光体の電子写真特性
が悪いことを本発明者らは知見している。また、系内の
循環速度が小さいため、分散効率が低いという欠点もあ
った。As a result, the probability of each particle receiving a shearing action is not the same, and the particle size distribution of the pigment particles becomes wide at the end of dispersion. The present inventors have found that the wider the particle size distribution, the worse the electrophotographic properties of the photoreceptor. Furthermore, since the circulation speed within the system is low, there is also the drawback that the dispersion efficiency is low.
そこで、本発明の、主たる目的は、分散効率が高く、し
かも分散粒子の粒度分布がシャープとなる分散方法を提
供するεとにある。Therefore, the main object of the present invention is to provide a dispersion method with high dispersion efficiency and a sharp particle size distribution of dispersed particles.
上記目的は、微粒子の分散にあたって、分散液の存在す
る分散系内に電界をかけながら分散を行うことで達成さ
れる。The above object is achieved by dispersing the fine particles while applying an electric field to the dispersion system in which the dispersion liquid is present.
本発明に従って分散系内の電界をかけると、粒子が帯電
し分散液内を流動するようになるから、前記のデッドゾ
ーンが解消され、均一に分散され、分散効率が高まり、
しかも粒子が剪断作用を受ける確率がほぼ同じになるた
め、はぼ均一な粒子径のものが得られ、もって粒度分布
がシャープなものとなり、粒子が有機光導電体粒子であ
り、これを感光体の感光層形成に用いたとき、感光体の
電子写真特性が向上する。When an electric field is applied within the dispersion system according to the present invention, the particles become charged and flow within the dispersion, thereby eliminating the dead zone, uniformly dispersing the particles, and increasing the dispersion efficiency.
Moreover, since the probability of the particles being subjected to shearing action is almost the same, particles with a fairly uniform diameter can be obtained, resulting in a sharp particle size distribution. When used to form a photosensitive layer, the electrophotographic properties of the photoreceptor are improved.
以下本発明をさらに詳説する。 The present invention will be explained in more detail below.
本発明における分散に当っては、サンドグラインダー、
アトライター、ニーダ−、ボールミル等の公知の分散機
の全てを用いることができる。For dispersion in the present invention, a sand grinder,
All known dispersing machines such as attritors, kneaders, and ball mills can be used.
この種の分散機を用いて、分散系内に電界をかける方法
としては、たとえば、第１図のサンドグライダ−では、
ポット１内に分散液２および砂等の分散メディア３を投
入しておき、円板ディスク４を高さ方向に複数枚保持し
たシャフト５を回転させ分散を図る際に、ポット１とシ
ャフト５とをブラシ６を介して電気的に接続し、電源７
から交流または直流を流し、分散液２中の粒子を帯電す
ることにより行う。As a method of applying an electric field within the dispersed system using this type of disperser, for example, in the sand glider shown in Fig. 1,
A dispersion liquid 2 and a dispersion medium 3 such as sand are put into the pot 1, and when dispersing by rotating the shaft 5 holding a plurality of discs 4 in the height direction, the pot 1 and the shaft 5 are are electrically connected through the brush 6, and the power supply 7
This is carried out by flowing alternating current or direct current from the source to charge the particles in the dispersion liquid 2.
第２図はアトライターの例で、ディスクの代りに、攪拌
ロッド４Ａがシャフト１に一体化されており、同様な分
散が可能である。FIG. 2 shows an example of an attritor, in which, instead of a disk, a stirring rod 4A is integrated into the shaft 1, and similar dispersion is possible.
電界をかける際、交流であっても直流でもよい。When applying an electric field, either alternating current or direct current may be used.
電圧としては、５０〜１０００ Ｖ、望ましくは１００
〜６００■、より好適には２００〜５００■がよい。交
流の場合、その周波数は、１ ｋ）Ｉｚ以下、望ましく
は３０〜６００Ｈｚ、さらに望ましくは５０〜３００Ｈ
ｚがよい。The voltage is 50 to 1000 V, preferably 100 V.
~600 ■, more preferably 200 ~ 500 ■. In the case of alternating current, the frequency is 1 k) Iz or less, preferably 30 to 600 Hz, more preferably 50 to 300 Hz.
Z is good.
本発明に係る微粒子としては、荷電するものであれば限
定されないが、分散性が特性に大きく影響する電子写真
用感光体を形成するための有機光導電体顔料を主に対象
とする場合において、本発明が有効に適用される。The fine particles according to the present invention are not limited as long as they are electrically charged, but when the target is mainly an organic photoconductor pigment for forming an electrophotographic photoreceptor whose dispersibility greatly affects the characteristics, The present invention can be effectively applied.
この有機光導電体粒子としは、アゾ系顔料、アンサンス
ロン系顔料、ペリレン系顔料、フタロシアニン系顔料、
キナクリドン系顔料、シアニン系顔料、ビリリウム系顔
料、チオピリリウム系顔料、インジゴ系顔料、スケアリ
ツク酸顔料、多環キノン系顔料等を挙げることができる
。These organic photoconductor particles include azo pigments, anthanthrone pigments, perylene pigments, phthalocyanine pigments,
Examples include quinacridone pigments, cyanine pigments, biryllium pigments, thiopyrylium pigments, indigo pigments, scaric acid pigments, and polycyclic quinone pigments.
顔料の分散剤としては、メタノール、エタノール、イソ
プロピルアルコール等のアルコール系溶剤、アセトン、
メチルエチルケトン、メチルイソブチルケトン、シクロ
ヘキサノン等のケトン系溶剤、ベンゼン、トルエン、キ
シレン、クロルベンゼン等の芳香族系溶剤、ＤＭＦ、Ｄ
ＭＡＣ等の各種溶剤が使用できる。。As pigment dispersants, alcohol solvents such as methanol, ethanol, and isopropyl alcohol, acetone,
Ketone solvents such as methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone, aromatic solvents such as benzene, toluene, xylene, and chlorobenzene, DMF, D
Various solvents such as MAC can be used. .
バインダー樹脂としては、ポリビニルブチラール、ホル
マール樹脂、ポリアミド樹脂、ポリウレタン樹脂、セル
ロース系樹脂、ポリエステル樹脂、ポリサルホン樹脂、
ポリカーボネート樹脂、アクリル系樹脂、スチレン系樹
脂等が用いられ。Binder resins include polyvinyl butyral, formal resin, polyamide resin, polyurethane resin, cellulose resin, polyester resin, polysulfone resin,
Polycarbonate resin, acrylic resin, styrene resin, etc. are used.
次に実施例によって本発明の効果を明らかにする。 Next, the effects of the present invention will be clarified by examples.
（実施例１．２および比較例１） 次記の処方にて、分散液を調製した。(Example 1.2 and Comparative Example 1) A dispersion liquid was prepared according to the following formulation.
〈処 方〉
・４，１０−ジブロムアンスアンスロン ２ 重４１Ｂ
・ポリカーボネート ２重量部・ＭＥＫ
２５０重量部上記の分散液を
第１図に示すサンドグラインダーにて、分散した。その
際、シャフトの回転数を１１０００ｒｐ 、電界を交流
４００Ｖで１００Ｈｚの条件でかけた。これを実施例１
とした。<Prescription> ・4,10-dibrom anthron 2 heavy 41B
・Polycarbonate 2 parts by weight ・MEK
250 parts by weight of the above dispersion was dispersed using a sand grinder as shown in FIG. At that time, the shaft rotation speed was 11,000 rpm, and the electric field was applied at 400 V AC and 100 Hz. Example 1
And so.
また、電源を４００■の直流として以外は実施例１と同
様としたものを実施例２とした。In addition, Example 2 was the same as Example 1 except that the power source was 400 μm DC.
さらに、電界をかけないこと以外は実施例１と同様とし
たものを比較例１とした。Furthermore, Comparative Example 1 was prepared in the same manner as Example 1 except that no electric field was applied.
上記各側にもいて、掘場製作所側製粒度分布測定装置ｒ
ＣＡＰＡ−５００Ｊにて平均粒径の経時変化を調べ、分
散性の変化を調べたところ、第３図の結果を得た。また
、５時間後における粒度分布は第４図であり、かつ到達
平均粒径は第１表の通りであった。There is also a particle size distribution measuring device on the Horiba factory side.
When the change in average particle diameter over time was investigated using CAPA-500J and the change in dispersibility was investigated, the results shown in FIG. 3 were obtained. Further, the particle size distribution after 5 hours was as shown in FIG. 4, and the average particle size reached was as shown in Table 1.
第 １ 表
第３図の結果によると、本発明法によれば、分散時間が
著しく短縮され、第４図および第１表の結果によると、
本発明法による方が、粒度分布がシャープとなり、しか
も同じ分散時間の下で、平均粒径を小さくできることが
判る。According to the results shown in Table 1 and Figure 3, the method of the present invention significantly shortens the dispersion time, and according to the results shown in Figure 4 and Table 1,
It can be seen that the method of the present invention has a sharper particle size distribution and can reduce the average particle size under the same dispersion time.
かくして得られた分散液により電子写真用感光体を作製
し、電子写真特性を調べたところ、第２表の結果が得ら
れた。An electrophotographic photoreceptor was prepared using the dispersion thus obtained, and its electrophotographic properties were examined, and the results shown in Table 2 were obtained.
試験は、川口電機側製ｒ Ｅ Ｐ Ａ−８１００Ｊを用
い、暗部電位■８および明部電位■１を測定するととも
に、半減露光量を調べた。In the test, using REP A-8100J manufactured by Kawaguchi Electric Co., Ltd., dark area potential (8) and light area potential (1) were measured, and the half-decreased exposure amount was investigated.
第２表の結果によると、従来例によるものに比較して、
本発明法によって得た分散液に従うと、帯電特性および
耐久性が著しく向上した感光体を得ることができること
が判る。According to the results in Table 2, compared to the conventional example,
It can be seen that by following the dispersion obtained by the method of the present invention, a photoreceptor with significantly improved charging characteristics and durability can be obtained.
（実施例３および比較例２） 次記の処方にて分散液を調整した。(Example 3 and Comparative Example 2) A dispersion liquid was prepared according to the following formulation.
（１）式の有機光導電体粒子 ２部ＰＭＭＡ
２部
１．２−ジクロルエタン ２５０部分散に際して
は、第２図に示すアトライターを用い、シャフトの回転
数を３０Ｏｒｐｍとし、電源電圧を直流５００■とした
。これを実施例３とした。また、電界をかけない以外は
同一条件によるものを比較例２とした。Organic photoconductor particles of formula (1) 2 parts PMMA
When dispersing 250 parts of 1.2-dichloroethane, an attritor shown in FIG. 2 was used, the rotational speed of the shaft was set to 30 Orpm, and the power supply voltage was set to 500 cm DC. This was designated as Example 3. Comparative Example 2 was prepared under the same conditions except that no electric field was applied.
初期平均粒径が約１０μｍのものを３時間分散した後の
平均粒径を第３表に、得られた分散液によって作製した
感光体の電子写真特性を第４表にそれぞれ示した。Table 3 shows the average particle size after dispersing the particles having an initial average particle size of about 10 μm for 3 hours, and Table 4 shows the electrophotographic characteristics of the photoreceptor prepared using the resulting dispersion.
第 ３ 表
第 ４ 表
結果は、実施例１，２および比較例１との対比と同様な
傾向を示した。The results in Tables 3 and 4 showed the same tendency as in comparison with Examples 1 and 2 and Comparative Example 1.
以上の通り、本発明によれば、分散効率が高く（分散時
間を短くでき）、分散粒子の粒度分布かシャープとなり
、特に感光体の作製のために用し゛る有機光導電体粒子
の分散に当って、本発明をｉｎ用すると、その効果が顕
著となる。As described above, according to the present invention, the dispersion efficiency is high (the dispersion time can be shortened), the particle size distribution of the dispersed particles is sharp, and it is particularly suitable for dispersing organic photoconductor particles used for producing photoreceptors. In this case, when the present invention is used internally, the effect becomes remarkable.
第１図および第２図は本発明に係る分散機の概要図、第
３図および第４図は実施例での結果を示すグラフである
。
２・・・分散液、３・・・分散メディア、６・・・ブラ
シ、７・・・電源。FIGS. 1 and 2 are schematic diagrams of the disperser according to the present invention, and FIGS. 3 and 4 are graphs showing the results in Examples. 2...Dispersion liquid, 3...Dispersion media, 6...Brush, 7...Power source.
Claims (2)
系内に電界をかけながら分散を行うことを特徴とする微
粒子の分散方法。(1) A method for dispersing fine particles, which comprises dispersing fine particles while applying an electric field to a dispersion system in which a dispersion liquid exists.
散方法。(2) The dispersion method according to item 1, wherein the fine particles are organic photoconductor pigments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62335575A JPH01176432A (en) | 1987-12-28 | 1987-12-28 | Grain dispersing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62335575A JPH01176432A (en) | 1987-12-28 | 1987-12-28 | Grain dispersing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01176432A true JPH01176432A (en) | 1989-07-12 |
Family
ID=18290114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62335575A Pending JPH01176432A (en) | 1987-12-28 | 1987-12-28 | Grain dispersing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01176432A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11319530A (en) * | 1998-05-20 | 1999-11-24 | Nok Corp | Method for dispersing conductive particle flocculate |
| EP1870156A1 (en) * | 2006-06-22 | 2007-12-26 | Nitto Denko Corporation | Dispersion and redispersion methods for dispersoids as well as crush method for aggregated dispersoids, and devices therefor |
| JP6121631B1 (en) * | 2016-01-29 | 2017-04-26 | ポッカサッポロフード＆ビバレッジ株式会社 | Method for reducing particle size |
-
1987
- 1987-12-28 JP JP62335575A patent/JPH01176432A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11319530A (en) * | 1998-05-20 | 1999-11-24 | Nok Corp | Method for dispersing conductive particle flocculate |
| EP1870156A1 (en) * | 2006-06-22 | 2007-12-26 | Nitto Denko Corporation | Dispersion and redispersion methods for dispersoids as well as crush method for aggregated dispersoids, and devices therefor |
| JP2008000686A (en) * | 2006-06-22 | 2008-01-10 | Nitto Denko Corp | Dispersing method and apparatus, re-dispersing method and apparatus, and cracking method and apparatus for dispersoid |
| JP6121631B1 (en) * | 2016-01-29 | 2017-04-26 | ポッカサッポロフード＆ビバレッジ株式会社 | Method for reducing particle size |
| WO2017130382A1 (en) * | 2016-01-29 | 2017-08-03 | ポッカサッポロフード＆ビバレッジ 株式会社 | Method for reducing particle size of fine particles |
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