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Scraper for electrophotography device

An electrophotography and scraper technology, applied in electrography, instrumentation, optics, etc., can solve problems such as cracking, long-term durability, and increase the strength of elastic components, so as to achieve long-term durability, increase fracture strength, and suppress hardness rising effect

Active Publication Date: 2010-12-15
BANDO CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, general elastic members may crack or crack if they are repeatedly deformed by bending, elongation, etc. For elastic members used in such deformation applications, mechanical strength such as breaking strength is required in order to prolong the service life. improvement
[0010] However, for example, if a filler such as a filler is dispersed in an elastic body to increase the mechanical strength of the elastic member, the hardness is generally also increased at the same time, and it has been difficult to increase the strength of the elastic member while maintaining the desired hardness.
[0011] For this reason, in the scraper for electrophotographic devices, there is a problem that it is difficult to make the durability period longer than before.

Method used

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  • Scraper for electrophotography device
  • Scraper for electrophotography device
  • Scraper for electrophotography device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0230] (Preparation of polyurethane resin solution)

[0231] Polyurethane resin solutions were prepared by blending shown in Table 1.

[0232] In addition, when preparing a polyurethane resin solution, firstly, the silica particles that have been surface-treated so that the particle diameter of the primary particles is 20 to 30 nm are dispersed in the polyol in a state of maximum particle diameter of 100 nm or less (even if aggregated particles are formed). etc., the particle diameter is also in the state of 100nm or less), and a silica-containing polyol (silica particle content: 25% by mass) is prepared, and the silica-containing polyol is appropriately diluted with a silica-free polyol. The polyol, the content of the silicon dioxide particle in the polyurethane resin solution of making is as shown in table 1, and the ratio of adjustment prepolymer and polyol is calculated as (prepolymer: polyol) ≈ (100: 91).

[0233] This silica-containing polyol and polyol were mixed usin...

Embodiment 6

[0244] A polyurethane resin solution was prepared in the same manner as in Example 1, except that a silica particle content of 11% by mass (6.3% by volume) was used.

[0245] The resulting polyurethane resin solution had a high viscosity and was in a state where it was difficult to cast in the mold for producing the elastic member for a blade of Example 1.

[0246] In addition, filler aggregation and the like were not observed in the elastomer obtained by curing the polyurethane resin solution, and it was confirmed that it was in a dispersed state with a maximum particle diameter of 100 nm or less.

Embodiment 7

[0248] A polyurethane resin solution was prepared in the same manner as in Example 1, except that titanium oxide particles having a primary particle diameter of 20 to 30 nm were used in an amount of 1% by mass (0.3 volume %), and the polyurethane resin solution was used To make elastic parts for scrapers.

[0249] In this elastic member for a blade, no filler aggregation or the like was observed, and it was confirmed that it was in a dispersed state with a maximum particle diameter of 100 nm or less.

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Abstract

The invention aims at providing a scraper for electronic photo-taking apparatus with long duration, which is characterized in that the invention is provided with an elastic component. At least the surface of the elastic component is formed by a polyurethane elastomer containing filler. The filler is dispersed in the polyurethane elastomer under the state with the maximum grain diameter below 100 nm.

Description

technical field [0001] The present invention relates to a scraper for an electrophotographic device. Background technique [0002] Conventionally, scrapers such as developing blades and cleaning blades, rollers such as developing rollers and intermediate transfer rollers, belts such as toothed belts for driving these rollers, and the like have been used in electrophotographic devices. [0003] The blade for an electrophotographic device generally uses a plate-shaped elastic member, and is used in a state where the surface of the plate-shaped elastic member is in contact with the photoreceptor or the outer peripheral surface of the roller. [0004] For example, a cleaning blade is disposed in an electrophotographic device in contact with a photoreceptor, and the above-mentioned plate-shaped elastic member is combined with Rotating photoreceptor sliding contact is used. [0005] In addition, the developing blade is disposed on the electrophotographic device in contact with t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G21/00C08G75/04C08K3/36
Inventor 中村定治永濑贵行三木隆司
Owner BANDO CHEM IND LTD