JP3473588B2 - Multicolor image forming method - Google Patents
Multicolor image forming methodInfo
- Publication number
- JP3473588B2 JP3473588B2 JP2001079477A JP2001079477A JP3473588B2 JP 3473588 B2 JP3473588 B2 JP 3473588B2 JP 2001079477 A JP2001079477 A JP 2001079477A JP 2001079477 A JP2001079477 A JP 2001079477A JP 3473588 B2 JP3473588 B2 JP 3473588B2
- Authority
- JP
- Japan
- Prior art keywords
- image
- toner layer
- transparent toner
- fixed
- color
- 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 - Fee Related
Links
Landscapes
- Developing Agents For Electrophotography (AREA)
- Fixing For Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
- Color Electrophotography (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電子写真法、静電
記録法で多色画像を形成する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a multicolor image by electrophotography and electrostatic recording.
【０００２】[0002]
【従来の技術】従来、電子写真方式で、カラー画像を形
成するときには、例えば、次のように行われる。まず、
原稿からの反射光をカラーＣＣＤにより色分解して、画
像処理装置で画像処理、色補正を施して複数色の画像信
号を得る。その信号を色別に、例えば半導体レーザーを
用いて変調されたレーザー光線として、感光体に一色ず
つ複数回照射することで、複数個の静電潜像を形成す
る。これらを例えば、Ｙ（イエロー）、Ｍ（マゼン
タ）、Ｃ（シアン）、Ｋ（黒）の４色のカラートナーで
順番に現像して、これらのトナー像を感光体から用紙等
の転写体に転写する。その後、転写像を熱定着ロール等
で加熱定着し、画像を形成する。2. Description of the Related Art Conventionally, when a color image is formed by an electrophotographic method, for example, it is performed as follows. First,
The reflected light from the original is color-separated by a color CCD, and image processing and color correction are performed by an image processing device to obtain image signals of a plurality of colors. A plurality of electrostatic latent images are formed by irradiating the photosensitive member with the signal for each color a plurality of times as a laser beam modulated by using a semiconductor laser for each color. For example, these are sequentially developed with four color toners of Y (yellow), M (magenta), C (cyan), and K (black), and these toner images are transferred from the photoconductor to a transfer body such as paper. Transcribe. Then, the transferred image is heated and fixed by a heat fixing roll or the like to form an image.
【０００３】このような方法等で得られたカラー画像に
は、定着されたトナーの粒子形状が残っているととも
に、バインダー樹脂や色剤の転写体（例えば、紙）への
しみ込みにより転写体自身の凹凸形状も残っており、印
刷や銀塩写真方式で得られた画像と比較して、不規則に
荒れた表面形状となっている。このため、画像表面での
乱反射がおこり、仮に、トナーの粒子形状をできるだけ
画像に反映させないように高分散顔料や、小粒径トナー
を用いたとしても、粒状性、光沢、さらには色調等が悪
い画像となってしまうことがわかっている。In the color image obtained by such a method or the like, the particle shape of the fixed toner remains, and the transfer body is impregnated into the transfer body (for example, paper) with the binder resin or the colorant. The uneven shape of itself remains, and it has an irregularly rough surface shape as compared with an image obtained by printing or a silver salt photographic method. For this reason, diffuse reflection occurs on the image surface, and even if a high-dispersion pigment or a small particle size toner is used so that the particle shape of the toner is not reflected in the image as much as possible, the graininess, gloss, and even the color tone are not affected. I know that it will result in a bad image.
【０００４】トナー粒子形状、および転写材凹凸の影響
の程度は、画像の濃度によって大きく異なっており、背
景部や低濃度部、高濃度部といった画像の種類で、画像
の光沢や粒状性、色調等が変わってしまい、印刷や銀塩
写真で得られた画像と比較して滑らかさのない不自然な
画像となっている。The shape of the toner particles and the degree of the influence of the unevenness of the transfer material greatly differ depending on the density of the image. Depending on the type of the image such as the background portion, the low density portion and the high density portion, the gloss, graininess and color tone of the image are Etc. have changed, resulting in an unnatural image without smoothness compared to the image obtained by printing or silver halide photography.
【０００５】また、転写材の凹凸の影響の程度は、転写
材の種類によって大きく異なっており、低価格な表面の
荒れた転写材では高い画像光沢や粒状性を得ることが困
難となっている。Further, the degree of the influence of the unevenness of the transfer material largely varies depending on the type of the transfer material, and it is difficult to obtain high image gloss and graininess with the transfer material having a rough surface and having a low price. .
【０００６】前記の問題点を解決するために、単に、現
像剤量を増加させた場合、高濃度部分では、定着後表面
に転写材の凹凸が反映されにくく高光沢が得られるもの
の、非画像部（背景部）では効果が得られない。さらに
現像剤量を多くすると、一般にトナーの帯電量が低下す
るため、背景部がかぶってしまうといった欠点をもつ。In order to solve the above-mentioned problems, when the amount of developer is simply increased, unevenness of the transfer material is less likely to be reflected on the surface after fixing in a high density portion, and high gloss is obtained, but non-image The effect cannot be obtained in the part (background part). Further, when the amount of the developer is increased, the charge amount of the toner is generally lowered, so that the background portion is fogged.
【０００７】そこで、前記のような問題点を解決するた
め、例えば特開昭６３−５８３７４号、特開平４−２７
８９６７号、特開平４−２０４６６９号、４−２０４６
７０号、特開平７−７２６９６号、特開平５−２３２８
４０号のようにカラートナーに加えて、透明トナーを転
写体に転写、定着する方法や、特開昭６３−９２９６
４、９２９６５等のように転写体上に予め透明樹脂をコ
ートする方法が提案されている。Therefore, in order to solve the above problems, for example, JP-A-63-58374 and JP-A-4-27 are used.
8967, JP-A-4-204669, 4-2046.
70, JP-A-7-72696, and JP-A-5-2328.
No. 40, a method of transferring and fixing a transparent toner to a transfer member in addition to the color toner, and JP-A-63-9296.
No. 4,92965, a method of coating a transparent resin on the transfer body in advance has been proposed.
【０００８】[0008]
【発明が解決しようとする課題】しかし、これらの方法
では、定着によってトナーが溶けすぎて転写材（例え
ば、紙）へのしみ込みが起こったり、トナーが充分に溶
けずにトナー粒子形状が残ってしまう等の問題が生じ
る。即ち、画像表面の機械的な凹凸形状が制御されてお
らず、表面での乱反射等により、充分な粒状性や光沢が
達成されず、期待された効果が得られない。However, in these methods, the toner is excessively melted by fixing, so that the transfer material (for example, paper) is soaked into the toner, or the toner is not sufficiently melted and the toner particle shape remains. Problems such as being lost occur. That is, the mechanical irregularity shape of the image surface is not controlled, and due to irregular reflection on the surface, sufficient graininess and gloss are not achieved, and the expected effect cannot be obtained.
【０００９】かくして、本発明は、印刷や銀塩写真同様
の、適度な光沢を有し、粒状性が良い、色調も高く滑ら
かな高画質画像を、電子写真方式によって、画像の種類
によらず転写体上に一様に再現することが可能な多色画
像形成方法を提供することを目的とする。Thus, according to the present invention, a high-quality image having appropriate gloss, good graininess, high color tone and smoothness, similar to printing or silver halide photography, can be obtained by an electrophotographic method regardless of the type of the image. An object of the present invention is to provide a multicolor image forming method capable of being uniformly reproduced on a transfer body.
【００１０】[0010]
【課題を解決するための手段】本発明者等は、前記の目
的を達成する方法の検討を重ねた結果、電子写真方式で
あるカラー複写機を用いて得られたカラー画像は、銀塩
写真方式や高級印刷によって得られたカラー画像と比較
して、表面の粗さに大きな差があり、特に画像部と非画
像部、中間濃度部分での差が大きいことがわかり、透明
トナー層を非画像部に設けるだけでなく、その表面粗さ
を特定の細かさに制御することで画像光沢や粒状性等が
改善がなされることを見出し、本発明を完成した。The inventors of the present invention have made extensive studies as to how to achieve the above-mentioned object, and as a result, a color image obtained by using a color copying machine which is an electrophotographic system is a silver salt photograph. Compared with the color image obtained by the method or high-quality printing, there is a large difference in the surface roughness, especially in the image area, non-image area, and intermediate density area. The present invention has been completed by finding that the image gloss and graininess can be improved not only by providing the image portion but also by controlling the surface roughness thereof to a specific fineness.
【００１１】即ち、本発明は、複数の有色トナー層を画
像として転写体上に定着する過程を有する多色画像形成
方法において、画像部および非画像部に透明トナー層を
定着する過程を更に有し、定着された層における表面平
均粗さ（Ｒａ）を０．０＜Ｒａ＜１．５μｍおよび／ま
たは最大表面粗さ（Ｒｍａｘ）を０．０＜Ｒｍａｘ＜１
０μｍとし、有色トナー層及び透明トナー層を設け定着
した時の表面平均粗さ（Ｒａ）を、有色トナー層を設け
透明トナー層を設けず定着した時の表面平均粗さ（Ｒ
ａ’）に対して、０．０＜Ｒａ＜０．７Ｒａ’とし、有
色トナー層及び透明トナー層を設け定着した時の最大表
面粗さ（Ｒｍａｘ）を、有色トナー層を設け透明トナー
層を設けず定着した時の最大表面粗さ（Ｒｍａｘ’）に
対して、０．０＜Ｒｍａｘ＜０．７Ｒｍａｘ’とするこ
とを特徴とする。 That is, the present invention further comprises a step of fixing the transparent toner layer on the image portion and the non-image portion in the multicolor image forming method having a step of fixing a plurality of colored toner layers as an image on the transfer member. The average surface roughness (Ra) of the fixed layer is 0.0 <Ra <1.5 μm and / or the maximum surface roughness (Rmax) is 0.0 <Rmax <1.
0 μm, fixing by providing a color toner layer and a transparent toner layer
The surface average roughness (Ra) when
Surface average roughness when fixed without a transparent toner layer (R
a ′), 0.0 <Ra <0.7Ra ′, and
Maximum table when color toner layer and transparent toner layer are provided and fixed
The surface roughness (Rmax) is set to a transparent toner by providing a color toner layer.
Maximum surface roughness (Rmax ') when fixing without layer
On the other hand, 0.0 <Rmax <0.7Rmax '
And are characterized.
【００１２】かかる本発明では、定着された画像の表面
粗度が画像全域で特定の細かさとなることによって、画
像表面の光の散乱が抑えられる等の作用によって、効果
的に上記目的が達成されると考えられる。In the present invention, since the surface roughness of the fixed image becomes a specific fineness over the entire image, scattering of light on the image surface can be suppressed, and the above object can be effectively achieved. It is thought to be.
【００１３】本発明では、透明トナー層は、非画像部の
みに設けられる。定着された後の層は、転写体（例え
ば、用紙）の凹凸を反映させない等の作用によって、表
面粗さを本発明所定の範囲内におさめることができる。In the present invention, the transparent toner layer is provided only in the non-image area. The layer after being fixed can have the surface roughness within the predetermined range of the present invention by the action of not reflecting the unevenness of the transfer body (for example, paper).
【００１４】[0014]
【００１５】なお、ここで、「有色トナー層を設け透明
トナー層を設けず定着した」過程自体は、基準のために
利用した過程であって、その過程単独では本発明の範囲
に入るものではない。つまり、その過程は、透明トナー
層を設けない以外は、本発明と同じ方法を実施してなさ
れ、本発明の方法の好ましい範囲を判断する上で、基準
となる。The process of "fixing with a colored toner layer and fixing without a transparent toner layer" is a process used for reference, and the process alone does not fall within the scope of the present invention. Absent. That is, the process is performed by performing the same method as that of the present invention except that the transparent toner layer is not provided, and is a reference for determining the preferable range of the method of the present invention.
【００１６】本発明においては、前記透明トナー層の厚
みＴと、前記複数の有色トナーのうち最も厚い有色トナ
ー層の厚みｔと、の関係が、３ｔ＞Ｔ＞０．５ｔを満た
すことが好ましい。In the present invention, it is preferable that the relationship between the thickness T of the transparent toner layer and the thickness t of the thickest color toner layer among the plurality of color toners satisfies 3t>T> 0.5t. .
【００１７】また、本発明においては、前記透明トナー
が、定着時の粘度が１０1〜１０4Ｐａ．ｓｅｃである樹
脂で形成されてなることが好ましい。Further, in the present invention, the transparent toner has a viscosity at the time of fixing of 10 1 to 10 4 Pa.s. It is preferably formed of a resin of sec.
【００１８】さらに、本発明においては、前記透明トナ
ーが、その表面に無機微粒子及び／又は樹脂微粒子を付
着させてなることが好ましい。前記透明トナーの表面に
無機微粒子を付着させてなる場合は、該無機微粒子の屈
折率をｎ、結着樹脂の屈折率をＮ、及び前記無機微粒子
の前記結着樹脂に対する重量比をＷ、とそれぞれした場
合に、下記式を満たすことが特に好ましい。
−４≦（ｎ−Ｎ）×Ｗ×１００≦４Further, in the present invention, it is preferable that the transparent toner has inorganic fine particles and / or resin fine particles adhered to the surface thereof. When inorganic fine particles are attached to the surface of the transparent toner, the refractive index of the inorganic fine particles is n, the refractive index of the binder resin is N, and the weight ratio of the inorganic fine particles to the binder resin is W. In each case, it is particularly preferable that the following formula is satisfied. -4 ≦ (n−N) × W × 100 ≦ 4
【００１９】[0019]
【発明の実施の形態】以下、本発明を実施の形態によっ
て詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to embodiments.
【００２０】本発明の多色画像形成方法は、複数の有色
トナー層を画像として転写体上に定着する手法の改良に
関する発明であり、その手法自体は、当業界で利用され
得る任意の手法が利用されてよい。The multicolor image forming method of the present invention is an invention relating to the improvement of the method of fixing a plurality of colored toner layers as an image on a transfer body, and the method itself is any method that can be used in the art. May be used.
【００２１】本発明の方法では、非画像部に透明トナー
層を定着し、定着された層（つまり、定着有色トナー層
及び定着透明トナー層）の粒状性、光沢度およびその均
一性を得るために、定着された層の表面平均粗さＲａ、
最大表面粗さＲｍａｘに関し、０．０＜Ｒａ＜１．５μ
ｍおよび／または０．０＜Ｒｍａｘ＜１０μｍとするこ
とを必須とする。Ｒａが１．５μｍを越え且つＲｍａｘ
＜１０μｍを越える画像は、表面での乱反射が生じて粒
状性を乱し、低グロスとなり色再現性も劣ってしまうこ
とがわかった。In the method of the present invention, the transparent toner layer is fixed to the non-image area, and the granularity, glossiness and uniformity of the fixed layers (that is, the fixed color toner layer and the fixed transparent toner layer) are obtained. , The surface average roughness Ra of the fixed layer,
Regarding the maximum surface roughness Rmax, 0.0 <Ra <1.5μ
It is essential that m and / or 0.0 <Rmax <10 μm. Ra exceeds 1.5 μm and Rmax
It has been found that in the case of an image of <10 μm, irregular reflection occurs on the surface to disturb the graininess, resulting in low gloss and poor color reproducibility.
【００２２】また、本発明の方法では、有色トナー層及
び透明トナー層を設け定着した時の表面平均粗さＲａ
が、有色トナー層を設け透明トナー層を設けず定着した
時のＲａ’に対して、０．０＜Ｒａ＜０．７Ｒａ’にな
ることが望ましい。また、有色トナー層及び透明トナー
層を設け定着した時の最大表面粗さＲｍａｘが、有色ト
ナー層を設け透明トナー層を設けず定着した時のＲｍａ
ｘ’に対して、０．０＜Ｒｍａｘ＜０．７Ｒｍａｘ’に
なることが望ましい。このように、転写体のもつ凹凸を
透明トナー層で軽減することで、白地部でのグロスが向
上し、画像濃度によらずグロスの均一な滑らかな、より
好ましい高品質の画像が得られることがわかった。In the method of the present invention, the surface average roughness Ra when the color toner layer and the transparent toner layer are provided and fixed is fixed.
However, it is preferable that 0.0 <Ra <0.7Ra 'is satisfied with respect to Ra' when the color toner layer is fixed and the transparent toner layer is not fixed. Further, the maximum surface roughness Rmax when the color toner layer and the transparent toner layer are provided and fixed is Rma when the color toner layer is provided and the transparent toner layer is not provided.
It is desirable that 0.0 <Rmax <0.7Rmax ′ for x ′. In this way, the unevenness of the transfer member is reduced by the transparent toner layer, so that the gloss in the white background is improved, and a smoother, more uniform and more preferable image of high quality can be obtained regardless of the image density. I understood.
【００２３】定着画像表面の粗度を、本発明で規定する
特定範囲に制御するためにいかなる方法を利用してもよ
いが、以下の方法が好ましい。Although any method may be used for controlling the roughness of the surface of the fixed image within the specific range defined in the present invention, the following method is preferable.
【００２４】表面の粗度を制御するための第１の方法と
して、透明トナー層の厚みＴを、複数の有色トナーのう
ち最も厚い有色トナー層の厚みｔに対して３ｔ＞Ｔ＞
０．５ｔを満たすようにすることが挙げられる。この方
法によって、定着後に、背景部（非画像部）と高濃度部
分の境界での画像の段差がなくなり、前記特定範囲の表
面粗度が得られやすく、画像界面での乱反射がなくな
り、均一なグロスをもつ画像が得られる。Ｔ＜０．５ｔ
となった場合、前記特定範囲の表面粗度が得られにく
く、定着画像の境界での段差が大きく、粒状性の改善効
果が小さいうえに、白地部／低濃度部では、用紙の凹凸
を拭いきれないため、低グロスで、粒状性の悪い画像し
か得ることができない傾向が強い。また、３ｔ＜Ｔの場
合、定着でのオフセットが発生しやすく、定着器の寿命
が短くなってしまう。As a first method for controlling the surface roughness, the thickness T of the transparent toner layer is 3t>T> with respect to the thickness t of the thickest colored toner layer among the plurality of colored toners.
One example is to satisfy 0.5t. By this method, after fixing, there is no step in the image at the boundary between the background portion (non-image portion) and the high-density portion, the surface roughness in the specific range is easily obtained, and diffuse reflection at the image interface is eliminated, resulting in a uniform image. An image with gloss is obtained. T <0.5t
When it becomes, it is difficult to obtain the surface roughness in the specific range, the step at the boundary of the fixed image is large, the effect of improving the graininess is small, and the unevenness of the paper is wiped in the white background / low density area. Therefore, there is a strong tendency that only images with low gloss and poor graininess can be obtained. Further, when 3t <T, an offset is likely to occur during fixing, and the life of the fixing device is shortened.
【００２５】また、表面の粗度を制御するための第２の
方法として、透明トナーを形成する樹脂の定着時の粘度
を変化させればよい。その具体的方法は、限定されない
が、例えば、トナーで使用する樹脂の分子量を変える。
表面粗度を細かくするために、分子量の小さい樹脂を用
いればよい。また、もう一つの方法として、使用する樹
脂中の架橋成分の量を変化させる。表面粗度を細かくす
るために、架橋成分の量の小さい樹脂を用いればよい。
更に、もう一つの方法として、使用する樹脂の分子構造
を変化させ、粘度を変化させる。As a second method for controlling the surface roughness, the viscosity of the resin forming the transparent toner at the time of fixing may be changed. Although the specific method is not limited, for example, the molecular weight of the resin used in the toner is changed.
In order to make the surface roughness fine, a resin having a small molecular weight may be used. Further, as another method, the amount of the crosslinking component in the resin used is changed. In order to make the surface roughness fine, a resin having a small amount of the cross-linking component may be used.
Furthermore, as another method, the viscosity is changed by changing the molecular structure of the resin used.
【００２６】本発明所定の表面粗度を得る為の樹脂の粘
度は、定着時、１０1〜１０4Ｐａ．ｓｅｃであることが
好ましい。１０1Ｐａ．ｓｅｃ未満の場合には、定着ロ
ールで定着した際にオフセットを生じやすい。また、オ
ーブン等で定着した場合にはオフセットを生じないもの
の定着画像の機械的強度が弱く、折り曲げた場合のひび
割れや擦られた場合の画像欠損が起こりやすい。また、
１０4Ｐａ．ｓｅｃを越えた場合には定着後の画像の表
面粗さが、本発明所定の値より大きくなってしまう傾向
にある。The viscosity of the resin for obtaining the predetermined surface roughness of the present invention is 10 1 to 10 4 Pa.s at the time of fixing. It is preferably sec. 10 1 Pa. If it is less than sec, offset is likely to occur when the toner is fixed on the fixing roll. Further, when fixed in an oven or the like, no offset occurs, but the mechanical strength of the fixed image is weak, and cracks when bent and image defects when rubbed are likely to occur. Also,
10 4 Pa. If it exceeds sec, the surface roughness of the image after fixing tends to be larger than the predetermined value of the present invention.
【００２７】本発明の方法で形成する透明トナー層用の
樹脂としては、ポリエステル系、ポリスチレン系、ポリ
アクリル系、ポリオレフィン系、ポリカーボネート系、
ポリアミド系、ポリイミド系、エポキシ系、ポリウレア
系などの一般トナー用に当業界で用いられる樹脂すべて
から、透明性等を考慮して、適宜選択すればよい。透明
性だけでなく、機械的な強度等を合わせ考慮すると、ポ
リエステル系樹脂が好ましい。The resin for the transparent toner layer formed by the method of the present invention includes polyester, polystyrene, polyacryl, polyolefin, polycarbonate,
It may be appropriately selected from all resins used in the art for general toner such as polyamide-based, polyimide-based, epoxy-based, and polyurea-based toners in consideration of transparency and the like. Considering not only transparency but also mechanical strength and the like, a polyester resin is preferable.
【００２８】本発明の方法により形成される定着画像の
表面の粗さはムラなく均一であることが好ましく、その
ためには、透明トナーの流動性と帯電性の制御が重要で
ある。このためには、通常、透明トナー表面に無機微粒
子及び／又は樹脂微粒子を付着させる。その無機微粒子
及び樹脂微粒子の種類は、所望の作用を発揮するかぎり
特に限定されないが、無機微粒子の例として、シリカ、
二酸化チタン、酸化すず、酸化モリブデンなどが挙げら
れる。また、分散性などの安定性を考慮して、シランカ
ップリング剤、チタンカップリング剤などで疎水化処理
したものも使用できる。一方、上記有機微粒子の例とし
ては、ポリエステル系、ポリスチレン系、ポリアクリル
系、ポリオレフィン系、ポリカーボネート系、ポリアミ
ド系、ポリイミド系、エポキシ系、ポリウレア系、フッ
素系などの微粒子が挙げられる。It is preferable that the surface roughness of the fixed image formed by the method of the present invention is uniform and uniform, and for that purpose, it is important to control the fluidity and chargeability of the transparent toner. For this purpose, inorganic fine particles and / or resin fine particles are usually attached to the surface of the transparent toner. The type of the inorganic fine particles and the resin fine particles is not particularly limited as long as it exhibits a desired action, but as an example of the inorganic fine particles, silica,
Examples thereof include titanium dioxide, tin oxide, molybdenum oxide and the like. Further, in consideration of the stability such as dispersibility, those subjected to a hydrophobic treatment with a silane coupling agent, a titanium coupling agent or the like can be used. On the other hand, examples of the organic fine particles include fine particles of polyester type, polystyrene type, polyacrylic type, polyolefin type, polycarbonate type, polyamide type, polyimide type, epoxy type, polyurea type, fluorine type and the like.
【００２９】上記無機微粒子及び／又は樹脂微粒子の粒
径は、好ましくは０．００５〜１μｍである。粒径が
０．００５μｍを下回ると、透明トナー表面に付着させ
たときに凝集がおこりやすく期待された効果が得られに
くい。また、粒径が１μｍを越えたときには定着画像表
面の粗さが本発明所定の範囲に入らなくなる傾向にあ
る。The particle size of the above-mentioned inorganic particles and / or resin particles is preferably 0.005 to 1 μm. If the particle size is less than 0.005 μm, agglomeration easily occurs when attached to the surface of the transparent toner, and the expected effect is difficult to be obtained. Further, when the particle size exceeds 1 μm, the roughness of the surface of the fixed image tends to fall outside the predetermined range of the present invention.
【００３０】さらに、本発明の効果（具体的には、表面
を平滑にした効果）を高めるために、透明トナー表面に
付着させた無機微粒子の屈折率ｎ、結着樹脂の屈折率
Ｎ、及び無機微粒子の結着樹脂に対する重量比Ｗとの関
係を
−４≦（ｎ−Ｎ）×Ｗ×１００≦４
とすることが好ましい。（ｎ−Ｎ）×Ｗ×１００の値が
規定の範囲以外の場合、無機微粒子と結着樹脂界面での
光散乱が大きくなり、画像表面の粗さは所望の範囲に入
るものの、画像の彩度が低下して、好ましい画像を形成
することができない。Further, in order to enhance the effect of the present invention (specifically, the effect of smoothing the surface), the refractive index n of the inorganic fine particles adhered to the surface of the transparent toner, the refractive index N of the binder resin, and The relationship between the weight ratio W of the inorganic fine particles to the binder resin is preferably −4 ≦ (n−N) × W × 100 ≦ 4. When the value of (n−N) × W × 100 is out of the specified range, light scattering at the interface between the inorganic fine particles and the binder resin becomes large, and the roughness of the image surface falls within the desired range, but the color of the image is reduced. To a lesser degree, and a favorable image cannot be formed.
【００３１】さらに、表面粗度を平滑にした本発明の効
果を高める目的で、トナー中に含まれる着色剤の顔料と
バインダーの界面での乱反射を抑えることが好ましく、
小粒径の顔料を高分散した着色剤の使用と、本発明の必
須要件との組合せでその目的が実現される。同じ目的
が、小粒径トナーの使用と本発明の必須要件との組合せ
で効果的に実現される。トナー粒径が９μｍより大きい
場合、トナー粒子が認識されてしまって、粒状性を著し
く乱すこととなり、表面での散乱を減少させた効果が十
分に得られないことがわかった。しかし、トナー粒径が
１μｍ未満である場合、逆極性に帯電されたトナーが増
えて、背景部へのかぶりとなり、満足された画像が得ら
れなかった。Further, for the purpose of enhancing the effect of the present invention in which the surface roughness is smoothed, it is preferable to suppress irregular reflection at the interface between the pigment and the binder of the colorant contained in the toner,
The combination of the use of a colorant in which a pigment having a small particle size is highly dispersed and the essential requirements of the present invention realizes the object. The same purpose is effectively achieved by the combination of the use of small particle size toner and the essential requirements of the present invention. It has been found that when the toner particle size is larger than 9 μm, the toner particles are recognized and the graininess is significantly disturbed, and the effect of reducing the scattering on the surface is not sufficiently obtained. However, when the toner particle size is less than 1 μm, the amount of the toner charged to the opposite polarity increases, causing fog on the background portion, and a satisfactory image cannot be obtained.
【００３２】また、色再現性を考慮すれば、定着した層
の表面粗さは、前記規定の範囲より細かくすることが好
ましく、その場合０．０＜Ｒａ＜０．５μｍであること
が重要である。０．５μｍを越えると表面の粗さが光の
波長と同等以上となり、表面散乱光が生じてくる。この
光線は画像による吸収がないため、画像の濃度を低下さ
せてしまう。In consideration of color reproducibility, the surface roughness of the fixed layer is preferably finer than the above-specified range, and in that case, it is important that 0.0 <Ra <0.5 μm. is there. If it exceeds 0.5 μm, the surface roughness becomes equal to or more than the wavelength of light, and surface scattered light occurs. This light beam is not absorbed by the image and thus reduces the density of the image.
【００３３】上記の好ましい表面粗さを達成するために
は、代表的には、少なくとも結着樹脂を含む表面層を有
し、表面粗さが０〜０．７μｍの基材を用いて、さらに
透明トナーを定着する工程として非接触式のオーブンま
たはラジアント定着装置を用いる。十分に細かい表面粗
さとするために、非接触式のオーブンまたはラジアント
定着装置によって、トナー粘度を十分に下げた条件で長
時間定着するのが好ましい。この場合に溶融したトナー
が基材の繊維のすきまに流れ込むことを防ぐため、少な
くとも結着樹脂を含む表面層を有する基材を用いるのが
よい。In order to achieve the above preferable surface roughness, a substrate having a surface layer containing at least a binder resin and having a surface roughness of 0 to 0.7 μm is typically used, and further, A non-contact type oven or a radiant fixing device is used as the step of fixing the transparent toner. In order to obtain a sufficiently fine surface roughness, it is preferable to fix the toner for a long time by a non-contact type oven or a radiant fixing device under the condition that the toner viscosity is sufficiently lowered. In this case, in order to prevent the melted toner from flowing into the gaps between the fibers of the base material, it is preferable to use a base material having a surface layer containing at least a binder resin.
【００３４】次に、透明トナー層を設ける手法について
述べるが、その手法は、本発明所定の必須要件を実現す
ることができれば任意であるが、今まで説明してきた事
項を勘案した上で、以下に例示する方法等を利用すれば
よい。Next, a method of providing the transparent toner layer will be described. The method is arbitrary as long as it can realize the essential requirements specified in the present invention. However, in consideration of the matters explained so far, the following will be described. The method illustrated in FIG.
【００３５】例えば、特開昭６３−５８３７４号に示さ
れたように、有色トナー現像方法と同様に、予めキャリ
アと混合帯電された透明トナーを現像器に入れて感光体
と近接させ、感光体上の非画像部に静電潜像を形成し
て、その潜像を静電気力によって現像し、すでに有色ト
ナーが現像、転写された転写材上にその像を静電気力に
よって転写し、定着ロールによって転写像を加熱定着す
る。For example, as shown in Japanese Patent Laid-Open No. 63-58374, as in the color toner developing method, a transparent toner previously mixed and charged with a carrier is put in a developing device and brought close to the photosensitive member. An electrostatic latent image is formed on the upper non-image area, the latent image is developed by electrostatic force, and the image is transferred by electrostatic force onto the transfer material that has already been developed and transferred by the colored toner, and then by the fixing roll. The transferred image is fixed by heating.
【００３６】また、他の一つの方法として、まず、感光
体上の非画像部に形成された潜像を先ず透明トナーで現
像して、その上に再度、帯電、露光を行って、有色トナ
ーで画像を現像する。これを有色トナーの数だけ繰り返
し、感光体上に複数個のトナー層を形成する。その後、
これを静電気力によって、転写体に一括転写して、定着
ロールによって加熱定着する方法が挙げられる。As another method, first, the latent image formed on the non-image area on the photosensitive member is first developed with transparent toner, and then charged and exposed again to give a colored toner. To develop the image. This is repeated by the number of color toners to form a plurality of toner layers on the photoconductor. afterwards,
There is a method in which this is collectively transferred to a transfer body by electrostatic force and heated and fixed by a fixing roll.
【００３７】なお、本発明の方法で利用し得るカラート
ナーは、当業界で利用しうる任意の種類から選択されて
よいが、例えばポリエステル樹脂、スチレン／アクリル
共重合体、スチレン／ブタジエン共重合体等などのバイ
ンダー樹脂に、着色剤としての顔料を分散含有させた平
均粒子径１〜１５μｍの粒子に、好ましくは平均粒子径
１〜９μｍの粒子に、例えば酸化けい素、酸化チタン、
酸化アルミニウム等の平均粒子径が５〜１００ｎｍの無
機微粒子、またはＰＭＭＡ、ＰＶＤＦ等の樹脂微粒子を
付着させることで得たものが利用できる。The color toner that can be used in the method of the present invention may be selected from any type available in the art. For example, polyester resin, styrene / acrylic copolymer, styrene / butadiene copolymer. In a binder resin such as, etc., a pigment as a colorant is dispersedly contained in particles having an average particle size of 1 to 15 μm, preferably particles having an average particle size of 1 to 9 μm, for example, silicon oxide, titanium oxide,
It is possible to use inorganic fine particles having an average particle diameter of 5 to 100 nm such as aluminum oxide, or those obtained by adhering resin fine particles such as PMMA and PVDF.
【００３８】上記着色顔料も任意であるが、例えば、
Ｙ（イエロー）着色剤；ベンジジンイエロー、キノリン
イエロー、ハンザイエロー
Ｍ（マゼンタ）着色剤；ローダミンＢ、ローズベンガ
ル、ピグメントレッド
Ｃ（シアン）着色剤；フタロシアニンブルー、アニリン
ブルー、ピグメントブルー
Ｋ（ブラック）着色剤；カーボンブラック、アニリンブ
ラック、カラー顔料のブレンド
等が用いられてよい。Although the above-mentioned coloring pigments are also optional, for example, Y (yellow) coloring agents; benzidine yellow, quinoline yellow, Hansa yellow M (magenta) coloring agents; rhodamine B, rose bengal, pigment red C (cyan) coloring agents. Phthalocyanine blue, aniline blue, pigment blue K (black) colorant; carbon black, aniline black, a blend of color pigments and the like may be used.
【００３９】本発明において定義する表面粗度（Ｒａ，
Ｒｍａｘ）の測定は、表面粗度計、Ｐｅｒｔｈｏｍｅｔ
ｅｒ Ｃ５Ｄ（Ｐｅｒｔｈｅｎ）を用いて、針先端径２
μｍの針で、スキャン速度０．５ｍｍ／ｓｅｃ、測定長
１．０ｍｍ、測定ピッチ１μｍ、カットオフ０．８ｍｍ
の条件でＲａｉ，Ｒｍａｘｉを求め、スキャンと垂直方
向に測定ピッチ５μｍで０．２５ｍｍの領域を５０回測
定して、その平均値をＲａ，Ｒｍａｘとする。Ｒａｉ，
Ｒｍａｘｉ、平均値の算出には画像解析装置ＳＡＳ−２
０１０（明伸工機製）を用いる。The surface roughness (Ra,
Rmax) is measured by a surface roughness meter, Perthomet
er C5D (Perthen), needle tip diameter 2
Scanning speed 0.5 mm / sec, measuring length 1.0 mm, measuring pitch 1 μm, cut-off 0.8 mm with μm needle
Rai and Rmaxi are obtained under the conditions of, and a region of 0.25 mm is measured 50 times in a direction perpendicular to the scan at a measurement pitch of 5 μm, and the average value thereof is taken as Ra and Rmax. Rai,
Rmaxi, an image analyzer SAS-2 for calculating the average value
010 (manufactured by Meishin Koki) is used.
【００４０】[0040]
【発明の効果】以上説明した本発明によれば、電子写真
方式で、画像表面で光拡散をなくすこと等が可能とな
り、適度な光沢を有し、粒状性が良く、色調の高い滑ら
かな高品質の多色画像を、画像の種類によらず転写体上
に一様に形成することができるようになった。According to the present invention described above, it is possible to eliminate light diffusion on the image surface in the electrophotographic system, has an appropriate luster, has good graininess, and has a high color tone and a high smoothness. A high-quality multicolor image can be uniformly formed on a transfer body regardless of the type of image.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｇ０３Ｇ 9/087 Ｇ０３Ｇ 15/00 ３０３ 15/00 ３０３ 15/01 Ｊ 15/01 9/08 ３２１ (58)調査した分野(Int.Cl.7，ＤＢ名) G03G 13/20 G03G 15/20 G03G 9/00 - 9/113 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI G03G 9/087 G03G 15/00 303 15/00 303 15/01 J 15/01 9/08 321 (58) Fields investigated (Int .Cl. 7 , DB name) G03G 13/20 G03G 15/20 G03G 9/00-9/113
Claims (5)
上に定着する過程を有する多色画像形成方法において、
非画像部に透明トナー層を定着する過程を更に有し、定
着された層における表面平均粗さ（Ｒａ）を０．０＜Ｒ
ａ＜１．５μｍおよび／または最大表面粗さ（Ｒｍａ
ｘ）を０．０＜Ｒｍａｘ＜１０μｍとし、 有色トナー層及び透明トナー層を設け定着した時の表面
平均粗さ（Ｒａ）を、有色トナー層を設け透明トナー層
を設けず定着した時の表面平均粗さ（Ｒａ’）に対し
て、０．０＜Ｒａ＜０．７Ｒａ’とし、 有色トナー層及び透明トナー層を設け定着した時の最大
表面粗さ（Ｒｍａｘ）を、有色トナー層を設け透明トナ
ー層を設けず定着した時の最大表面粗さ（Ｒｍａｘ’）
に対して、０．０＜Ｒｍａｘ＜０．７Ｒｍａｘ’とす
る、 ことを特徴とする多色画像形成方法。1. A multicolor image forming method including a step of fixing a plurality of colored toner layers as images on a transfer member,
The method further comprises the step of fixing the transparent toner layer on the non-image area, and the surface average roughness (Ra) of the fixed layer is 0.0 <R.
a <1.5 μm and / or maximum surface roughness (Rma
x) is 0.0 <Rmax <10 μm, and the surface average roughness (Ra) when the color toner layer and the transparent toner layer are provided and fixed is the surface when the color toner layer is provided and the transparent toner layer is not provided. The average roughness (Ra ') is set to 0.0 <Ra <0.7Ra', and the maximum surface roughness (Rmax) when the color toner layer and the transparent toner layer are fixed and fixed is set to the color toner layer. Maximum surface roughness when fixed without a transparent toner layer (Rmax ')
On the other hand, 0.0 <Rmax <0.7Rmax ′.
の有色トナーのうち最も厚い有色トナー層の厚みｔと、
の関係が、３ｔ＞Ｔ＞０．５ｔを満たすことを特徴とす
る請求項１に記載の多色画像形成方法。2. The thickness T of the transparent toner layer, and the thickness t of the thickest color toner layer among the plurality of color toners,
2. The multicolor image forming method according to claim 1, wherein the relationship of 3t>T> 0.5t is satisfied.
1〜１０4Ｐａ．ｓｅｃである樹脂で形成されてなること
を特徴とする請求項１又は２に記載の多色画像形成方
法。3. The transparent toner has a viscosity of 10 when fixed.
1 to 10 4 Pa. The multicolor image forming method according to claim 1 or 2, wherein the multicolor image forming method is performed by using a resin having a sec.
子及び／又は樹脂微粒子を付着させてなることを特徴と
する請求項１〜３のいずれか１に記載の多色画像形成方
法。4. The multicolor image forming method according to claim 1, wherein the transparent toner has inorganic fine particles and / or resin fine particles adhered to the surface thereof.
子を付着させてなり、かつ、該無機微粒子の屈折率を
ｎ、結着樹脂の屈折率をＮ、及び前記無機微粒子の前記
結着樹脂に対する重量比をＷ、とそれぞれした場合に、
下記式を満たすことを特徴とする請求項１〜４のいずれ
か１に記載の多色画像形成方法。 −４≦（ｎ−Ｎ）×Ｗ×１００≦４5. The transparent toner has inorganic fine particles adhered to the surface thereof, the refractive index of the inorganic fine particles is n, the refractive index of the binder resin is N, and the binder resin of the inorganic fine particles is When the weight ratio to W is W,
The multicolor image forming method according to claim 1, wherein the following formula is satisfied. -4 ≦ (n−N) × W × 100 ≦ 4
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001079477A JP3473588B2 (en) | 2001-03-19 | 2001-03-19 | Multicolor image forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001079477A JP3473588B2 (en) | 2001-03-19 | 2001-03-19 | Multicolor image forming method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00686396A Division JP3461994B2 (en) | 1996-01-18 | 1996-01-18 | Multicolor image forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001312166A JP2001312166A (en) | 2001-11-09 |
| JP3473588B2 true JP3473588B2 (en) | 2003-12-08 |
Family
ID=18935922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001079477A Expired - Fee Related JP3473588B2 (en) | 2001-03-19 | 2001-03-19 | Multicolor image forming method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3473588B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2431813A2 (en) | 2010-09-15 | 2012-03-21 | Ricoh Company, Ltd. | Print control apparatus, image forming system, printed-matter manufacturing method, and computer program |
| EP2431814A2 (en) | 2010-09-15 | 2012-03-21 | Ricoh Company, Ltd. | Information processing apparatus, data generation method, computer program product, and data structure |
| EP2654284A1 (en) | 2012-04-18 | 2013-10-23 | Ricoh Company, Ltd. | Print controlling apparatus, print controlling system, and print controlling method |
| US9069319B2 (en) | 2011-03-18 | 2015-06-30 | Ricoh Company, Limited | Information processing apparatus and information processing method |
| JP2016053727A (en) * | 2010-09-15 | 2016-04-14 | 株式会社リコー | Print control device, image forming system, print control method, printed matter manufacturing method, and program |
| US9342027B2 (en) | 2011-03-18 | 2016-05-17 | Ricoh Company, Limited | Printing control apparatus, image forming system, and printing control method which replace a type of surface effect imparted on a recording medium |
| US9508030B2 (en) | 2012-04-11 | 2016-11-29 | Ricoh Company, Ltd. | Information processing apparatus with image generating unit generating gloss-control plane data and designating emphasis to an image region for glossiness control to change surface effect of recording medium |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004333762A (en) * | 2003-05-06 | 2004-11-25 | Sharp Corp | Image forming method |
| JP5845986B2 (en) * | 2011-03-18 | 2016-01-20 | 株式会社リコー | PRINT CONTROL DEVICE, PRINT SYSTEM, PRINT CONTROL METHOD, AND PROGRAM |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62105157A (en) * | 1985-10-31 | 1987-05-15 | Mita Ind Co Ltd | Glossiness imparting toner |
| JPH0738084B2 (en) * | 1986-08-29 | 1995-04-26 | 富士ゼロックス株式会社 | Image forming method |
| JPH02201453A (en) * | 1989-01-31 | 1990-08-09 | Mita Ind Co Ltd | Image forming method |
| JP2846420B2 (en) * | 1990-06-29 | 1999-01-13 | 三菱製紙株式会社 | Photographic paper support |
| JPH05107798A (en) * | 1991-10-18 | 1993-04-30 | Minolta Camera Co Ltd | White toner for developing electrostatic charge image |
| JPH075738A (en) * | 1993-06-18 | 1995-01-10 | Canon Inc | Multicolor image forming device |
-
2001
- 2001-03-19 JP JP2001079477A patent/JP3473588B2/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9342026B2 (en) | 2010-09-15 | 2016-05-17 | Ricoh Company, Limited | Print control apparatus, image forming system, print control method, and printed-matter manufacturing method |
| EP2431814A2 (en) | 2010-09-15 | 2012-03-21 | Ricoh Company, Ltd. | Information processing apparatus, data generation method, computer program product, and data structure |
| JP2012083736A (en) * | 2010-09-15 | 2012-04-26 | Ricoh Co Ltd | Printer controller, image formation system, print control method, printed matter manufacturing method and program |
| US9977391B2 (en) | 2010-09-15 | 2018-05-22 | Ricoh Company, Ltd. | Print control apparatus, image forming system, print control method, and printed-matter manufacturing method |
| US9575454B2 (en) | 2010-09-15 | 2017-02-21 | Ricoh Company, Ltd. | Information processing apparatus generating gloss control data |
| US9110426B2 (en) | 2010-09-15 | 2015-08-18 | Ricoh Company, Limited | Information processing apparatus, data generation method, and data structure |
| JP2016053727A (en) * | 2010-09-15 | 2016-04-14 | 株式会社リコー | Print control device, image forming system, print control method, printed matter manufacturing method, and program |
| EP2431813A2 (en) | 2010-09-15 | 2012-03-21 | Ricoh Company, Ltd. | Print control apparatus, image forming system, printed-matter manufacturing method, and computer program |
| US9354583B2 (en) | 2011-03-18 | 2016-05-31 | Ricoh Company, Ltd. | Information processing apparatus, method, and storage medium for generating image data specifying a type of surface effect |
| US9342027B2 (en) | 2011-03-18 | 2016-05-17 | Ricoh Company, Limited | Printing control apparatus, image forming system, and printing control method which replace a type of surface effect imparted on a recording medium |
| US9069319B2 (en) | 2011-03-18 | 2015-06-30 | Ricoh Company, Limited | Information processing apparatus and information processing method |
| US9508030B2 (en) | 2012-04-11 | 2016-11-29 | Ricoh Company, Ltd. | Information processing apparatus with image generating unit generating gloss-control plane data and designating emphasis to an image region for glossiness control to change surface effect of recording medium |
| EP2654284A1 (en) | 2012-04-18 | 2013-10-23 | Ricoh Company, Ltd. | Print controlling apparatus, print controlling system, and print controlling method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001312166A (en) | 2001-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7321449B2 (en) | Gloss-imparting device and color image-forming apparatus | |
| JP3518257B2 (en) | Multicolor image forming method | |
| JP3461994B2 (en) | Multicolor image forming method | |
| JP3526149B2 (en) | Color image forming method and color image forming apparatus | |
| EP0349227B1 (en) | Transparent film and color image forming method | |
| JP3473588B2 (en) | Multicolor image forming method | |
| US5229188A (en) | Transparent film and color image forming method | |
| JP3846121B2 (en) | Image forming apparatus and image forming method | |
| US6846599B2 (en) | Image structure and image-forming system | |
| JP3478278B2 (en) | Multicolor image forming method | |
| JP3994688B2 (en) | Color image forming apparatus | |
| JPH11249375A (en) | Color image forming device | |
| JP4106551B2 (en) | Image structure and image forming apparatus for producing the same | |
| JP3255104B2 (en) | Image forming method | |
| JP3802123B2 (en) | Multicolor image forming method | |
| JP3826424B2 (en) | Multicolor image forming method | |
| JP2002328502A (en) | Color image forming apparatus | |
| JP2004020861A (en) | Image forming apparatus | |
| EP1395879A1 (en) | Image-recording sheet | |
| JP4120183B2 (en) | Color image forming apparatus | |
| US7063888B2 (en) | Image supporting member and image forming apparatus using the same | |
| JP3646473B2 (en) | Multicolor image forming method | |
| JP3755348B2 (en) | Color image forming apparatus and color image forming method | |
| JP3144902B2 (en) | Color image forming method | |
| JPH1031343A (en) | Multicolor image forming method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070919 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080919 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090919 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100919 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110919 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120919 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120919 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130919 Year of fee payment: 10 |
|
| LAPS | Cancellation because of no payment of annual fees |