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Polyurethane elastomer composition, production method for cleaning blade, and cleaning blade

A polyurethane elastomer, cleaning blade technology, applied in the direction of the electric recording process applying the charge pattern, the equipment and instruments of the electric recording process applying the charge pattern, etc. , the increase of defective products and other problems, to achieve the effect of improving the vulcanization characteristics

Inactive Publication Date: 2019-07-16
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, it is difficult to inject the necessary amount of the liquid composition into the mold due to the increased viscosity of the liquid composition
In addition, there is also a problem that cured polyurethane chips are mixed into the liquid composition in the pre-injection stage
In any case, an increase in the amount of catalyst sometimes leads to an increase in defects
In addition, due to the increase in the viscosity of the liquid composition, there is also a problem that large-scale products cannot be produced

Method used

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  • Polyurethane elastomer composition, production method for cleaning blade, and cleaning blade
  • Polyurethane elastomer composition, production method for cleaning blade, and cleaning blade
  • Polyurethane elastomer composition, production method for cleaning blade, and cleaning blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0023] (cleaning scraper)

[0024] figure 1 It is a cross-sectional view showing an example of the cleaning blade according to the embodiment of the present invention. Such as figure 1 As shown, the cleaning blade 1 includes a blade main body (itself also referred to as a cleaning blade) 10 and a support member 20 , and the blade main body 10 and the support member 20 are bonded by an adhesive (not shown). The blade main body 10 is composed of an elastic body 11 which is a molded body of a rubber base material (urethane).

[0025] The elastic body 11 constituting the squeegee main body 10 is formed of cast polyurethane elastic body. A polyurethane elastomer is a cured product of a polyurethane elastomer composition. The cast polyurethane elastomer refers to a polyurethane elastomer obtained by processing a polyurethane elastomer composition by casting molding. The polyurethane elastomer is molded to form the elastic body 11 (molded body) constituting the blade main body 1...

Embodiment

[0059] Hereinafter, the present invention will be illustrated by examples, but these examples do not limit the present invention.

[0060] (sample 1)

[0061] An ester polyol (manufactured by DIC Co., Ltd., Polylite CT-4117) as a bifunctional polyol, 4,4'-diphenylmethane diisocyanate (manufactured by Mitsui Chemicals Co., Ltd., COSMONATE PH) as a polyisocyanate Mixing and reaction were performed in the compounding ratio shown in the following Table 1. Then, the temperature was adjusted to 80° C. to obtain a liquid mixture (liquid A) of an NCO-terminated prepolymer and polyisocyanate.

[0062] As a curing agent, 1,4-butanediol (manufactured by Mitsubishi Chemical Co., Ltd., 1,4Butanediol), 1,1,1-trimethylolpropane (manufactured by Koei Chemical Industry Co., Ltd., Trimethylolpropane) and two Glycerin (manufactured by Sakamoto Pharmaceutical Co., Ltd., diglycerin S), 2,4-pentanedione (manufactured by Tokyo Chemical Industry Co., Ltd., acetylacetone) as a blocking agent, 2-ethy...

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Abstract

The invention provides a polyurethane elastomer composition which retains material properties required for cleaning blades and is capable of attaining both improved pot life and improved vulcanizationproperties; a method for producing a cleaning blade; and the cleaning blade. A polyurethane elastomer composition for use in producing cleaning blades, which includes a casting-type polyurethane elastomer, the composition comprising: a bifunctional polyol; a polyisocyanate; a hardener; a positive catalyst that is an imidazole compound and accelerates a urethanation reaction; a negative catalyst that is a carboxylic acid compound and restricts the catalysis of the positive catalyst in accordance with the temperature; and a blocking agent that protects the isocyanate groups of the polyisocyanate.

Description

technical field [0001] The present invention relates to a polyurethane elastomer composition, a method for producing a cleaning blade, and a cleaning blade. Background technique [0002] Generally, in electrophotographic processing, at least the respective processes of cleaning, charging, exposure, development, and transfer are performed on an electrophotographic photoreceptor. In each process, a cleaning blade for removing and cleaning toner remaining on the surface of the photoreceptor drum, a conductive roller for imparting uniform charge to the photoreceptor, a transfer belt for transferring a toner image, and the like are used. Also, from the viewpoint of plastic deformation, wear resistance, etc., the cleaning blade is mainly made of thermosetting polyurethane resin. [0003] The cleaning blade made of polyurethane, for example, uses polyisocyanate, polyol, curing agent, catalyst, and other necessary components, and uses methods such as the prepolymer method, semi-one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G21/00C08G18/10C08G18/16C08G18/20C08G18/80G03G15/00
CPCC08G18/10C08G18/16C08G18/20C08G18/80G03G15/00G03G21/00
Inventor 西口浩司下妻克哉铃木雄太
Owner NOK CORP
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