JP2011033986A5

JP2011033986A5 -

Info

Publication number: JP2011033986A5
Application number: JP2009182548A
Authority: JP
Filing date: 2009-08-05
Publication date: 2012-09-20
Anticipated expiration: 2029-08-05

Description

上記目的を達成するため、結着樹脂、着色剤および離型剤を少なくとも含有するトナー粒子を有するトナーにおいて、
該トナー粒子の平均円形度が０．９６５以上１．０００以下であり、且つ、該トナー粒子のＢＥＴ比表面積が１．００ｍ²／ｇ以上３．５０ｍ²／ｇ以下であり、
該トナー粒子とポリカーボネート樹脂を含有する平板との付着力（ｎＮ）が２ｎＮ以上９０ｎＮ以下であることを特徴とするトナーを提供するに至った。 To achieve the above object, in a toner having toner particles containing at least a binder resin, a colorant and a release agent ,
The toner particles have an average circularity of 0.965 or more and 1.000 or less , and the BET specific surface area of the toner particles is 1.00 m ² / g or more and 3.50 m ² / g or less ,
The present inventors have provided a toner characterized in that the adhesion force (nN) between the toner particles and a flat plate containing a polycarbonate resin is 2 nN or more and 90 nN or less.

＜トナーの帯電性の環境安定性評価＞
二成分現像剤を常温低湿環境（２３℃／５％）の環境下で１昼夜放置し、その後５０ｃｃのポリ容器に入れ、１分間かけて２００回振とうさせる。次いで前述に記載の手段で摩擦帯電量を測定し、得られた帯電量を帯電量Ｌ（ｍＣ／ｋｇ）とした。さらに、該二成分現像剤を高温高湿環境（３０℃／８０％）の環境下で１昼夜放置し、その後５０ｃｃのポリ容器に入れ、１分間かけて２００回振とうさせ、同様の方法で測定した帯電量を帯電量Ｈ（ｍＣ／ｋｇ）とした。 <Environmental stability evaluation of toner chargeability>
The two-component developer is allowed to stand for one day in a room temperature and low humidity environment (23 ° C./5%), and then placed in a 50 cc plastic container and shaken 200 times over 1 minute. Next, the triboelectric charge amount was measured by the means described above, and the obtained charge amount was defined as the charge amount L (mC / kg) . Et al is, the two-component developer a high-temperature and high-humidity environment (30 ℃ / 80%) in an environment allowed to stand for one day and night, then placed in a plastic container 50 cc, was 200 Kaifu shaken over 1 minute, the same The charge amount measured by the method was defined as a charge amount H (mC / kg).

Claims

In a toner having toner particles containing at least a binder resin, a colorant, and a release agent ,
The toner particles have an average circularity of 0.965 or more and 1.000 or less , and the BET specific surface area of the toner particles is 1.00 m ² / g or more and 3.50 m ² / g or less ,
A toner having an adhesion force (nN) between 2 nN and 90 nN between the toner particles and a flat plate containing a polycarbonate resin.

The toner according to claim 1, wherein the surfaces of the toner particles are covered with resin fine particles.

The toner particles, a polymerizable monomer, a polymerizable monomer composition containing at least a colorant and a release agent was placed in an aqueous medium, perform granulation, polymerizable monomer in an aqueous medium 3. The toner according to claim 1 , comprising: core particles obtained by polymerizing a body ; and an outer shell formed by fixing resin fine particles on the surface of the core particles.

The toner according to any one of claims 1 to 3, characterized by being externally adding 0.05 mass% to 0.50 mass% of the inorganic fine particles to the toner particles.

Charging the electrostatic image bearing member, a visible image developed to visualize, which is formed by exposing the charged electrostatic image bearing member to form an electrostatic image, the electrostatic image with a developer having a toner over In an image forming method in which a toner image is transferred onto a transfer material with or without an intermediate transfer member, and the transferred visible image is fixed on the transfer material by a fixing means to form a fixed image .
The toner image forming method which is a toner according to any one of claims 1 to 4.