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toner

A technology of toner and colorant, applied in the field of toner, to achieve the effect of excellent cold offset resistance and heat offset resistance

Active Publication Date: 2021-04-20
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a problem caused when the pressure at the fixing nip is lowered and an image with a high printing rate is output at high speed is that the toner is Deformation tends to peel from paper (cold staining)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0149] (1) Preparation of toner pellets

[0150] Toner pellets are obtained by placing about 3 g of toner (which can vary depending on the specific gravity of the sample) in a vinyl chloride ring for measurement having an inner diameter of 27 mm, by using, for example, a sample press molding machine "MAEKAWA Testing Machine" (MFG Co. ., Ltd.) was prepared by pressurizing at 200 kN for 60 seconds and molding the sample.

[0151] (2) Measurement of integral value of stress

[0152] The integral value of the stress of the toner is measured by using a tack tester "TAC-1000" (manufactured by Rhesca Corporation) according to the device operation manual. A schematic diagram of the tack tester is shown in figure 1 middle.

[0153] As a specific measurement method, toner pellets are placed on the sample pressing plate 205, and the probe tip 203 is set to 150°C by using the probe unit 202.

[0154] By adjusting the head unit 200 , the probe tip is then lowered to a position where th...

Embodiment 1

[0285] A modified printer LBP3100 (manufactured by Canon Inc.) was used for printout evaluation. The modification involved increasing the process speed from the conventional process speed to 200 mm / sec and reducing the contact pressure of the fixing film and the pressure roller to 69 kg·m / sec. Retrofitting was also made in such a way that the fusing temperature of the fusing unit in the remodeled LBP3100 could be adjusted.

[0286]

[0287] The cold offset resistance in the image forming apparatus described above was evaluated under a normal temperature and normal pressure environment (a temperature of 25.0° C. and a humidity of 50% RH). FOX RIVER BOND paper (110g / m 2 ) for the fixing medium. By using a medium in the form of a thick paper having relatively large surface irregularities, it is possible to strictly evaluate the fixability under conditions that promote peeling and rubbing.

[0288] (cold stain resistance)

[0289] Adjust the loaded amount of toner on the fix...

Embodiment 2 to 24

[0318] Evaluation was performed in the same manner as in Example 1 except that Toners 2 to 24 were used. The evaluation results are shown in Table 9.

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Abstract

The present invention relates to a toner. Provided is a toner including toner particles containing a binder resin, a wax and a colorant. The softening point of the toner is 80°C or higher and 140°C or lower. The average circularity of the toner is 0.940 or more. The integral value of the stress of the toner at 150° C. measured by using a viscosity tester was 78 g·m / sec or more.

Description

technical field [0001] The present invention relates to a toner suitable for a recording method using electrophotography, electrostatic recording, or toner ejection system recording, or the like. Background technique [0002] In consideration of energy and space saving, there has recently been demand for downsizing of the main bodies of printers and copiers. The simplification of the fixing device is one of the methods of downsizing the size of the main body. Film fixing that enables easy simplification of the heat source and equipment configuration is a method of simplifying the fixing equipment. In film fixing, in addition to facilitating simplification of a heat source and device configuration, thermal conductivity is improved as a result of using a film as a fixing member. Therefore, the start printout time can be shortened. However, since the membrane is used by being pressed against a roller under relatively high pressure, the membrane tends to wear out over long-te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/08
CPCG03G9/0821G03G9/0827
Inventor 长岛裕二郎长谷川雄介佐野智久铃村祯崇有村怜士浦谷梢
Owner CANON KK