JP3383765B2 - Non-magnetic one-component developing toner - Google Patents
Non-magnetic one-component developing tonerInfo
- Publication number
- JP3383765B2 JP3383765B2 JP04429998A JP4429998A JP3383765B2 JP 3383765 B2 JP3383765 B2 JP 3383765B2 JP 04429998 A JP04429998 A JP 04429998A JP 4429998 A JP4429998 A JP 4429998A JP 3383765 B2 JP3383765 B2 JP 3383765B2
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- JP
- Japan
- Prior art keywords
- silica
- toner
- weight
- parts
- negatively
- 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.)
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Description
【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【発明の属する技術分野】本発明は、複写機またはプリ
ンターなどの画像出力装置に使用するトナーに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toner used in an image output device such as a copying machine or a printer.
【0002】[0002]
【従来の技術】非磁性1成分現像方法は、トナーと搬送
部材の静電気力によってトナーを搬送部材表面に担持し
て現像位置まで搬送し、感光体表面の潜像を現像するも
のである。トナーと搬送部材間に静電気力を発生させる
ためには、搬送部材と当接した層厚規制部材を使用する
ことが多く、該層厚規制部材と搬送部材の間をトナーが
通過する時に、トナーは帯電することになる。また、ト
ナーを瞬時に均一に帯電させるためには、トナーを薄層
化することが重要となり、該部材はトナー層の規制も同
時に行うことになる。それ故搬送部材及び層厚規制部材
が、トナーに汚染されると搬送部材上のトナーを所望の
帯電量に制御できなくなり、カブリ増加や白スジ状の濃
度ムラが発生することになる。2. Description of the Related Art In a non-magnetic one-component developing method, toner is carried on the surface of the carrying member by the electrostatic force of the toner and the carrying member, and the toner is carried to a developing position to develop the latent image on the surface of the photoreceptor. In order to generate an electrostatic force between the toner and the conveying member, a layer thickness regulating member that is in contact with the conveying member is often used, and when the toner passes between the layer thickness regulating member and the conveying member, the toner Will be charged. Further, in order to charge the toner instantly and uniformly, it is important to make the toner thin, and the member also regulates the toner layer at the same time. Therefore, when the conveying member and the layer thickness regulating member are contaminated with the toner, the toner on the conveying member cannot be controlled to a desired charge amount, resulting in increased fog and white stripe-like density unevenness.
【0003】従来、トナー汚染を軽減するために、外添
シリカの増量が提案されている。これはトナーが搬送部
材と層厚規制部材との間を通過する際に生じる摩擦熱に
よるトナー成分の融着を防止することを目的としている
が、充分にトナー汚染を防止することができない。Conventionally, it has been proposed to increase the amount of externally added silica in order to reduce toner contamination. This aims at preventing fusion of the toner component due to frictional heat generated when the toner passes between the transport member and the layer thickness regulating member, but cannot sufficiently prevent toner contamination.
【0004】[0004]
【発明が解決しようとする課題】本発明の目的は、搬送
部材及び層厚規制部材へのトナー汚染がなく、繰り返し
使用しても高画質な画像を提供できる負帯電性非磁性1
成分現像用トナーを提供する。SUMMARY OF THE INVENTION An object of the present invention is to provide a negatively chargeable non-magnetic material 1 capable of providing a high-quality image even when it is repeatedly used without toner contamination on the conveying member and the layer thickness regulating member.
A toner for component development is provided.
【0005】[0005]
【課題を解決するための手段】本発明は非磁性1成分現
像用トナーを担持して搬送する搬送部材と、該搬送部材
に圧接して設けられた層厚規制部材とを少なくとも有す
る現像装置に使用するトナーであって、該トナーは、結
着樹脂、着色剤、負帯電性電荷制御剤を必須成分とする
樹脂粉末の表面に、少なくとも疎水化処理された正帯電
性シリカ及び負帯電性シリカを付着させることにより、
搬送部材及び層厚規制部材へのトナー融着が防止される
こと。また該正帯電性シリカと該負帯電性シリカの添加
量をそれぞれWpとWn、及びこれらの飽和帯電量の絶
対値を|Qp|と|Qn|としたとき、下記(1)式を
満足するシリカ外添方法とすることにより、搬送部材、
層厚規制部材にトナー融着がなく、且つ高画像濃度でカ
ブリの少ない画像が得られることを見出した。The present invention relates to a developing device having at least a carrying member carrying and carrying a non-magnetic one-component developing toner, and a layer thickness regulating member provided in pressure contact with the carrying member. The toner used is a positively chargeable silica and a negatively chargeable silica that are at least hydrophobized on the surface of a resin powder containing a binder resin, a colorant, and a negatively chargeable charge control agent as essential components. By attaching
Toner fusion to the conveying member and the layer thickness regulating member should be prevented. When the addition amounts of the positively chargeable silica and the negatively chargeable silica are Wp and Wn, respectively, and the absolute values of their saturated charge amounts are | Qp | and | Qn |, the following formula (1) is satisfied. By using the silica external addition method, a conveying member,
It was found that an image having high image density and less fog can be obtained without toner fusion on the layer thickness regulating member.
【0006】[0006]
【数2】
ただし、Wnは0.5〜0.9重量部、Wpは0.02
5〜0.20重量部である。[Equation 2] However, Wn is 0.5 to 0.9 parts by weight and Wp is 0.02.
5 to 0.20 parts by weight.
【0007】[0007]
【発明の実施の形態】以下、本発明を詳細に説明する。
本発明のトナーに使用される結着樹脂としては、アルコ
ール成分例えばジアルコール成分、多価アルコール成分
とカルボン酸成分例えばジカルボン酸成分、多価カルボ
ン酸成分とから得られたポリエステル樹脂、又は一部に
ウレタン結合を有するポリエステル樹脂などのポリエス
テル樹脂、あるいはスチレンアクリル共重合体などの従
来非磁性1成分トナー用結着剤として公知の熱可塑性樹
脂が使用される。これらの結着樹脂は、トナーの保存安
定性の面から、ガラス転移点が55℃以上の結着樹脂で
あることが好ましく、その酸価は40以下であることが
好ましい。酸価が40を超えると耐湿性が劣化し好まし
くない。さらに好ましくは20以下である。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
As the binder resin used in the toner of the present invention, an alcohol component such as a dialcohol component, a polyester resin obtained from a polyhydric alcohol component and a carboxylic acid component such as a dicarboxylic acid component or a polyvalent carboxylic acid component, or a part thereof A polyester resin such as a polyester resin having a urethane bond, or a thermoplastic resin such as a styrene-acrylic copolymer known as a binder for a conventional non-magnetic one-component toner is used. From the viewpoint of storage stability of the toner, these binder resins are preferably binder resins having a glass transition point of 55 ° C. or higher, and the acid value thereof is preferably 40 or lower. If the acid value exceeds 40, the moisture resistance deteriorates, which is not preferable. It is more preferably 20 or less.
【0008】本発明のトナーに使用される着色剤として
は、トナーに従来使用されてきた任意の適当な顔料また
は染料が挙げられる。顔料としてはカーボンブラック、
アニリンブラック、アセチレンブラック、ナフトールイ
エロー、ハンザイエロー、ローダミンレーキ、アリザリ
ンレーキ、ベンガラ、フタロシアニンブルー、インダン
スレンブルー等が例示される。これらの顔料は定着画像
の光学濃度を維持するのに必要充分な量が用いられ、通
常結着樹脂100重量部に対し0.1〜20重量部、好
ましくは0.2〜10重量部添加される。染料として、
アゾ系染料、アントラキノン系染料、キサンテン系染
料、メチン系染料等が例示される。これらの染料は通常
結着樹脂100重量部に対し0.1〜20重量部、好ま
しくは0.3〜10重量部添加される。The colorants used in the toners of the present invention include any suitable pigment or dye conventionally used in toners. Carbon black as a pigment,
Examples include aniline black, acetylene black, naphthol yellow, Hansa yellow, rhodamine lake, alizarin lake, red iron oxide, phthalocyanine blue, indanthrene blue and the like. These pigments are used in an amount necessary and sufficient for maintaining the optical density of a fixed image, and usually 0.1 to 20 parts by weight, preferably 0.2 to 10 parts by weight is added to 100 parts by weight of the binder resin. It As a dye
Azo dyes, anthraquinone dyes, xanthene dyes, methine dyes and the like are exemplified. These dyes are usually added in an amount of 0.1 to 20 parts by weight, preferably 0.3 to 10 parts by weight, based on 100 parts by weight of the binder resin.
【0009】負帯電性電荷制御剤としては、例えば有機
金属錯体やキレート化合物が有効であり、アゾ系金属錯
体、アセチルアセトン金属錯体、芳香族ハイドロキシカ
ルボン酸、芳香族ダイカルボン酸、芳香族モノ及びポリ
カルボン酸及びその金属塩、無水物、エステル類、ビス
フェノール等のフェノール誘導体類などが挙げられる。
これらの電荷制御剤は通常結着樹脂100重量部に対し
0.1〜10重量部、好ましくは0.5〜5重量部の範
囲で配合される。上記範囲の上限を超えると帯電不良が
生じてカブリ等による画像品質の低下が起こり、下限未
満であると十分な帯電量が得られず、画像濃度の低下、
多数枚連続コピーしたときに画像濃度が安定しないとい
う問題が生ずる。また樹脂粉末にはポリプロピレンワッ
クスやポリエチレンワックス等の離型剤等を含有させて
もよい。As the negatively chargeable charge control agent, for example, an organic metal complex or a chelate compound is effective, and an azo metal complex, an acetylacetone metal complex, an aromatic hydroxycarboxylic acid, an aromatic dicarboxylic acid, an aromatic monocarboxylic acid or a poly (polycarboxylic acid) is used. Examples thereof include carboxylic acids and their metal salts, anhydrides, esters, and phenol derivatives such as bisphenol.
These charge control agents are usually added in an amount of 0.1 to 10 parts by weight, preferably 0.5 to 5 parts by weight, based on 100 parts by weight of the binder resin. If it exceeds the upper limit of the above range, image quality is deteriorated due to fog and the like, and if it is less than the lower limit, a sufficient charge amount cannot be obtained, and the image density is lowered,
There is a problem that the image density is not stable when a large number of sheets are continuously copied. Further, the resin powder may contain a release agent such as polypropylene wax or polyethylene wax.
【0010】樹脂粉末は前記結着樹脂、着色剤、負帯電
性電荷制御剤等を溶融混練、粉砕、分級して得てもよい
し、結着樹脂の重合時に着色剤、負帯電性電荷制御剤等
を含有させて得る重合法で得てもよい。樹脂粉末の表面
に下記で述べる正帯電性シリカ及び負帯電性シリカを付
着させるには、ヘンシェルミキサーやスーパーミキサー
等の攪拌機で付着させればよく、正帯電性シリカ及び負
帯電性シリカは樹脂粉末の表面にまぶしと呼ばれる弱い
状態で付着されていてもよいし、正帯電性シリカ及び負
帯電性シリカの一部が樹脂粉末の内部に埋没し固着され
ている状態でもよい。樹脂粒子の表面には正帯電性シリ
カ及び負帯電性シリカの他にアルミナ、チタニア、酸化
亜鉛等の無機酸化物、カーボンブラック等の導電性微粒
子等が付着されていてもよい。The resin powder may be obtained by melt-kneading, pulverizing and classifying the above-mentioned binder resin, colorant, negatively chargeable charge control agent and the like. Alternatively, when the binder resin is polymerized, the colorant and negatively chargeable charge control may be carried out. It may be obtained by a polymerization method in which an agent or the like is contained. The positively chargeable silica and the negatively chargeable silica described below can be adhered to the surface of the resin powder by using a stirrer such as a Henschel mixer or a super mixer. The positively chargeable silica and the negatively chargeable silica are resin powders. It may be attached to the surface of the resin in a weak state called glaze, or a part of the positively chargeable silica and the negatively chargeable silica may be embedded and fixed inside the resin powder. In addition to the positively chargeable silica and the negatively chargeable silica, inorganic oxides such as alumina, titania and zinc oxide, and conductive fine particles such as carbon black may be attached to the surface of the resin particles.
【0011】本発明に使用される疎水化された負帯電性
シリカ及び正帯電性シリカとしては、市販のものも使用
できるが、飽和帯電量とトナー表面への付着量の関係式
である(1)式を満足するようなシリカを選定し、その
量を決めることが高画像濃度でカブリの少ない画像を得
るために必要である。
(1)式の中央項の値Wn×|Qn|/Wp×|Qp|
が7より小さい場合には、カブリが増加し、30より大
きい場合には搬送部材(以下、スリーブという)や層厚
規制部材(以下、ブレードという)にトナーが融着しや
すい。また、正帯電性シリカの付着量は樹脂粉末100
重量部に対して0.025重量部以上であることが必要
で、0.025重量部より少ない場合ではトナー融着防
止効果が認められない。上限は0.20重量部以下であ
る。負帯電性シリカの付着量はトナーの流動性などを考
慮して決めれば良いが0.5乃至0.9重量部が必要で
ある。 As the hydrophobized negatively-charged silica and positively-charged silica used in the present invention, commercially available ones can be used, but it is a relational expression between the saturated charge amount and the adhesion amount on the toner surface (1 ) It is necessary to select silica that satisfies the formula and determine the amount thereof in order to obtain an image with high image density and less fog. Value of the central term of the formula (1) Wn × | Qn | / Wp × | Qp |
When the value is less than 7, the fog increases, and when it is more than 30, the toner is likely to be fused to the conveying member (hereinafter referred to as a sleeve) and the layer thickness regulating member (hereinafter referred to as a blade). In addition, the amount of the positively chargeable silica attached is 100
It is necessary that the amount is 0.025 parts by weight or more with respect to parts by weight, and if it is less than 0.025 parts by weight, the toner fusion preventing effect cannot be recognized. The upper limit is 0.20 parts by weight or less
It The amount of the negatively chargeable silica may be determined in consideration of the fluidity of the toner, but 0.5 to 0.9 parts by weight is required.
is there.
【0012】負帯電性シリカと正帯電性シリカを本発明
の範囲にて併用した場合に、トナー融着が生じない理由
は完全に解明されてはいないが、スリーブとブレードの
帯電極性はトナーの正規帯電極性(本発明の場合は負帯
電)とは逆極性に位置するため、負帯電性シリカのみを
付着させたトナーではブレードやスリーブに強固に付着
しやすくなり、トナーがブレードとスリーブ間を通過す
る時の摩擦力が増大し、結果的にトナー融着が生じると
考えられる。Although the reason why toner fusion does not occur when negatively chargeable silica and positively chargeable silica are used in combination within the scope of the present invention has not been completely clarified, the charging polarity of the sleeve and the blade is different from that of the toner. Since the polarity is opposite to the normal charging polarity (negative charging in the case of the present invention), the toner to which only the negatively charging silica is attached is likely to be firmly attached to the blade or the sleeve, and the toner is likely to be attached between the blade and the sleeve. It is considered that the frictional force at the time of passage increases, resulting in toner fusion.
【0013】しかるに、本発明の範囲にて正帯電性シリ
カを添加すると、トナー表面の一部にニュートラル乃至
正極性に帯電する部分が生じ、しかもこの部分がコロ作
用を発揮することで、トナーに与えられる上記摩擦力が
弱まり、結果的にトナー融着が防止され、且つ極端な正
帯電量の発生もないためにカブリや濃度ウス、トナー飛
散を生じにくいトナーになると考えられる。However, when the positively chargeable silica is added within the range of the present invention, a part of the toner surface that is neutrally or positively charged is generated, and this part exerts a roller action, thereby making the toner. It is considered that the above-mentioned frictional force applied is weakened, as a result of which toner fusing is prevented and an extreme amount of positive charge is not generated, so that the toner is less likely to cause fog, density usability, and toner scattering.
【0014】負帯電性シリカとしては、親水性シリカを
ヘキサメチルジシラザン、ジメチルジクロロシランなど
のシラン化合物、ジメチルシリコーンオイル、各種変性
シリコーンオイルなどにより疎水化処理した公知のもの
が使用可能である。正帯電性シリカとしては、疎水性シ
リカをアミノ変性シリコーンオイル、第4級アンモニウ
ム化合物など、またはこれら正極性処理剤とともに各種
シラン化合物により疎水化及び正帯電性付与処理を行っ
た公知のものが使用可能である。[0014] As the negatively chargeable silica, hydrophilic silica hexamethylene Le disilazane, silane compounds such as dimethyldichlorosilane, dimethyl silicone oil, the various modified silicone oils those known in which a hydrophobic treatment is available. As the positively chargeable silica, known ones obtained by subjecting hydrophobic silica to hydrophobic modification and positive charge imparting treatment with various silane compounds together with amino-modified silicone oil, quaternary ammonium compound, etc. It is possible.
【0015】該正帯電性及び負帯電性シリカの一次平均
径はおおよそ10〜50nmのものがトナー流動性付与
効果が高く好ましく使用でき、疎水性の尺度としてのメ
タノールウェッタビリティー値が40以上が好ましい。
更に好ましくは45以上である。40を下回ると高温環
境でのトナー帯電の低下が大きくなり好ましくない。The positively chargeable and negatively chargeable silicas having a primary average diameter of about 10 to 50 nm can be preferably used because they have a high toner fluidity imparting effect, and a methanol wettability value of 40 or more as a measure of hydrophobicity. preferable.
More preferably, it is 45 or more. If it is less than 40, the toner charge in the high temperature environment is greatly reduced, which is not preferable.
【0016】正帯電性シリカと負帯電性シリカの最適な
合計添加量は、トナーの粒子径分布やシリカ添加前の樹
脂粉末の流動性などにより一概には決められないが、例
えば体積平均径8〜9μmのトナーであれば、樹脂粉末
100重量部に対して0.2〜2重量部が好ましい。更
に好ましくは0.4〜1.5重量部である。2重量部を
越えると環境安定性や定着性の低下を伴いやすく好まし
くない。The optimum total addition amount of the positively chargeable silica and the negatively chargeable silica cannot be determined unconditionally depending on the particle size distribution of the toner and the fluidity of the resin powder before the addition of silica, but for example, the volume average diameter 8 In the case of a toner having a particle size of ˜9 μm, 0.2 to 2 parts by weight is preferable for 100 parts by weight of the resin powder. It is more preferably 0.4 to 1.5 parts by weight. If it exceeds 2 parts by weight, environmental stability and fixing property are likely to be deteriorated, which is not preferable.
【0017】該正帯電性及び負帯電性シリカの飽和帯電
量Qpμc/g及びQnμc/gの測定方法を説明す
る。正帯電性又は負帯電性シリカを150メッシュ篩い
にて篩い分けして150メッシュをパスしたシリカを測
定に使用する。キャリア(パウダーテック社製:FSL
1020)99.8gと測定用シリカ0.2gを150
ccのポリビンに入れ、22〜24℃/57〜62%R
Hに調整された雰囲気に10時間放置する。その後、定
回転の回転装置に該ポリビンを設置した後この雰囲気下
でポリビンを回転させ混合撹拌を行う。混合過程におい
て、シリカの帯電量をブローオフ帯電量測定機にて初期
より5分おきに3回ずつ測定し、3回の平均値を整数一
位を四捨五入してその撹拌時間における帯電量とする。
シリカの帯電量は時系列上ある時点で最大となり、それ
以後は低下するので該撹拌混合過程における最大帯電量
を本発明でいう飽和帯電量とする。ブローオフ帯電量測
定機において測定する際キャリアとシリカの分離に使用
するステンレス製の網には400メッシュのものを使用
する。A method for measuring the saturated charge amounts Qpμc / g and Qnμc / g of the positively and negatively charged silica will be described. The positively-charged or negatively-charged silica is sieved with a 150-mesh sieve, and the silica that has passed 150 mesh is used for the measurement. Carrier (made by Powder Tech: FSL
1020) 99.8 g and 0.2 g of measuring silica 150
Put in cc polybin, 22-24 ℃ / 57-62% R
Leave in an atmosphere adjusted to H for 10 hours. After that, the polybin is placed on a rotating device of constant rotation, and then the polybin is rotated and mixed and stirred under this atmosphere. In the mixing process, the charge amount of silica is measured with a blow-off charge amount measuring device three times every 5 minutes from the initial stage, and the average value of the three times is rounded to the nearest whole number to obtain the charge amount in the stirring time. .
Since the charge amount of silica becomes maximum at a certain point in time series and decreases thereafter, the maximum charge amount in the stirring and mixing process is defined as the saturated charge amount in the present invention. A 400-mesh stainless mesh is used for separating the carrier and silica when measuring with a blow-off charge amount measuring device.
【0018】[0018]
【実施例】以下に実施例を示すが、本発明は何等これら
に限定されるものではない。EXAMPLES Examples will be shown below, but the present invention is not limited thereto.
【0019】
<樹脂粉末Aの製造>
ポリエステル樹脂(Tg=63℃、Mn=3900、Mw=48300、
THF不溶分=13%) 100 重量部
カーボンブラック(キャボット社製:リーガル400R) 5.5重量部
負帯電性電荷制御剤(オリエント化学社製:S−34) 1.3重量部
ポリプロピレンワックス 1.5重量部
(三洋化成工業社製:ビスコール550P)
上記材料を均一に混合した後、押し出し機にて充分混練
した。冷却後に粉砕分級を行い、体積平均径9.5μm
の樹脂粉末Aを得た。<Production of Resin Powder A> Polyester resin (Tg = 63 ° C., Mn = 3900, Mw = 48300, THF insoluble matter = 13%) 100 parts by weight carbon black (Cabot Corporation: Legal 400R) 5.5 parts by weight Part Negatively chargeable charge control agent (Orient Chemical Co., Ltd .: S-34) 1.3 parts by weight Polypropylene wax 1.5 parts by weight (Sanyo Kasei Co., Ltd .: Viscole 550P) Extruder after uniformly mixing the above materials Kneaded thoroughly. After cooling, pulverizing and classifying, volume average diameter 9.5 μm
Resin powder A of was obtained.
【0020】<負帯電性疎水性シリカの例>
1.シリカA
(メタノールウエッタビリティー値=48、ジメチルジ
クロロシラン処理、比表面積110m2/g)
飽和帯電量Qn=−320μc/g
2.シリカB
(メタノールウェッタビリティー値=80、ヘキサメチ
ルジシラザン処理、比表面積140m2/g)飽和帯電
量Qn=−490μc/g<Example of Negatively Charged Hydrophobic Silica> 1. Silica A (methanol wettability value = 48, dimethyldichlorosilane treatment, specific surface area 110 m 2 / g) Saturated charge amount Qn = −320 μc / g 2. Silica B (methanol wettability value = 80, hexamethyi
Le disilazane treatment, a specific surface area of 140 m 2 / g) saturated charge amount Qn = -490μc / g
【0021】
<正帯電性疎水性シリカの例>
飽和帯電量Qp
1.シリカC(クラリアントジャパン社製:HVK2115 ) +130μc/g
2.シリカD(クラリアントジャパン社製:H3050EP ) +380μc/g
上記樹脂粉末Aに表1に示すようにシリカをヘンシェル
ミキサーで付着させ実施例及び比較例トナーを作製し市
販の非磁性1成分現像プリンタ(20PPM)にてプリ
ントテストを行い、画像濃度(ID)、カブリ(B
G)、トナー融着の有無を確認した。テスト環境条件は
22〜25℃/55〜65%RHである。プリントテス
トは印字率約6%の文字チャートを繰り返しプリントし
た。トナー融着の有無は、ハーフトーン画像(A4サイ
ズ)をプリントすることにより確認した。その実写テス
トの結果は表2に示すとおりである。なお、画像濃度
(ID)はベタ画像をマクベスRD−914にて測定し
た反射濃度であり、カブリ(BG)はプリント前の用紙
とプリント後の同用紙における非画像部のハンター白色
度の差を示す。<Example of Positively Charged Hydrophobic Silica> Saturated charge amount Qp 1. Silica C (HVK2115 manufactured by Clariant Japan KK) +130 μc / g 2. Silica D (manufactured by Clariant Japan: H3050EP) +380 μc / g As shown in Table 1, silica was adhered to the above resin powder A by a Henschel mixer to prepare toners of Examples and Comparative Examples, and commercially available non-magnetic one-component developing printer (20PPM ), A print test is performed, and image density (ID) and fog (B
G), the presence or absence of toner fusion was confirmed. The test environment conditions are 22 to 25 ° C./55 to 65% RH. In the print test, a character chart with a printing rate of about 6% was repeatedly printed. The presence or absence of toner fusion was confirmed by printing a halftone image (A4 size). The results of the live-action test are shown in Table 2. The image density (ID) is the reflection density of a solid image measured by Macbeth RD-914, and the fog (BG) is the difference in hunter whiteness of the non-image area between the paper before printing and the paper after printing. Show.
【0022】[0022]
【表1】 [Table 1]
【0023】[0023]
【表2】 [Table 2]
【0024】[0024]
【発明の効果】上記の比較検討の結果から明らかなよう
に、本発明のトナーは結着樹脂、着色剤、負帯電性電荷
制御剤を必須成分とする樹脂粉末の表面に、疎水化処理
された正負の帯電性シリカが付着していることにより好
ましい帯電量を得ることができ、特に7≦Wn×|Qn
|/Wp×|Qp|≦30の間になるようにした一成分
現像用トナーは実写テストでも7000枚後に於ても、
スリーブへのトナーの付着が認められず好適であった。As is clear from the results of the above comparative examination, the toner of the present invention is subjected to a hydrophobic treatment on the surface of a resin powder containing a binder resin, a colorant and a negatively chargeable charge control agent as essential components. By attaching the positive and negative chargeable silica, a preferable charge amount can be obtained, and in particular, 7 ≦ Wn × | Qn
The toner for one-component development, which is set such that | / Wp × | Qp | ≦ 30, is obtained even after the actual copying test after 7,000 sheets.
Adhesion of toner to the sleeve was not observed, which was preferable.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮本 篤生 静岡県静岡市用宗巴町3番1号 株式会 社巴川製紙所化成品事業部内 (56)参考文献 特開 昭62−17751(JP,A) 特開 昭61−250658(JP,A) 特開 平9−171267(JP,A) 特開 平9−166884(JP,A) 特開 平9−160297(JP,A) 特開 平9−114128(JP,A) 特開 平8−234479(JP,A) 特開 平7−36209(JP,A) 特開 平6−83103(JP,A) 特開 平4−260061(JP,A) 特開 平2−298959(JP,A) 特開 平2−66564(JP,A) (58)調査した分野(Int.Cl.7,DB名) G03G 9/08 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsushi Miyamoto 3-1, Somune-cho, Shizuoka-shi, Shizuoka Prefecture Stock company, Tomoegawa Paper Co., Ltd. (56) Reference JP 62-17751 (JP, A) JP 61-250658 (JP, A) JP 9-171267 (JP, A) JP 9-166884 (JP, A) JP 9-160297 (JP, A) JP 9 -114128 (JP, A) JP 8-234479 (JP, A) JP 7-36209 (JP, A) JP 6-83103 (JP, A) JP 4-260061 (JP, A) ) JP-A-2-298959 (JP, A) JP-A-2-66564 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) G03G 9/08
Claims (2)
を必須成分とする樹脂粉末の表面に、少なくとも疎水化
処理された正帯電性シリカ及び疎水化処理された負帯電
性シリカが付着してなり、前記樹脂粉末100重量部に
対して正帯電性シリカの付着量をWp重量部及び飽和帯
電量をQpμc/g、負帯電性シリカの付着量をWn重
量部及び飽和帯電量をQnμc/gとしたとき、下記
(1)式を満足することを特徴とする非磁性1成分現像
用トナー。 【数1】 ただし、Wnは0.5〜0.9重量部、Wpは0.02
5〜0.20重量部である。1. A surface of a resin powder containing a binder resin, a colorant, and a negatively chargeable charge control agent as essential components, on the surface of which at least hydrophobically-treated positively-charged silica and hydrophobically-treated negatively-charged silica are provided. The adhesion amount of the positively chargeable silica is Wp parts by weight and the saturation charge amount is Qpμc / g, and the adhesion amount of the negatively chargeable silica is Wn parts by weight and the saturation charge amount relative to 100 parts by weight of the resin powder. A toner for non-magnetic one-component development, which satisfies the following expression (1) when Qn μc / g. [Equation 1] However, Wn is 0.5 to 0.9 parts by weight and Wp is 0.02.
5 to 0.20 parts by weight.
タノールウェッタビリティー値が40以上であることを
特徴とする請求項1記載の非磁性1成分現像用トナー。2. The non-magnetic one-component developing toner according to claim 1, wherein the positively chargeable silica and the negatively chargeable silica have a methanol wettability value of 40 or more.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04429998A JP3383765B2 (en) | 1998-02-12 | 1998-02-12 | Non-magnetic one-component developing toner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04429998A JP3383765B2 (en) | 1998-02-12 | 1998-02-12 | Non-magnetic one-component developing toner |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11231571A JPH11231571A (en) | 1999-08-27 |
JP3383765B2 true JP3383765B2 (en) | 2003-03-04 |
Family
ID=12687636
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Application Number | Title | Priority Date | Filing Date |
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JP04429998A Expired - Fee Related JP3383765B2 (en) | 1998-02-12 | 1998-02-12 | Non-magnetic one-component developing toner |
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Country | Link |
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JP (1) | JP3383765B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6875550B2 (en) | 2001-07-11 | 2005-04-05 | Seiko Epson Corporation | Non-magnetic single-component toner, method of preparing the same, and image forming apparatus using the same |
US7217486B2 (en) | 2003-01-17 | 2007-05-15 | Seiko Epson Corporation | Toner and image-forming apparatus using the toner |
JP6624137B2 (en) | 2017-03-24 | 2019-12-25 | 京セラドキュメントソリューションズ株式会社 | Positively chargeable toner |
JP6835035B2 (en) | 2018-05-15 | 2021-02-24 | 京セラドキュメントソリューションズ株式会社 | Positive charge toner |
-
1998
- 1998-02-12 JP JP04429998A patent/JP3383765B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH11231571A (en) | 1999-08-27 |
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