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A kind of preparation method of polyurethane scraper blade for printer

A polyurethane technology for printers, applied in the field of printing materials, to achieve the effect of increasing surface roughness and eliminating fine lines

Active Publication Date: 2019-06-07
中山市鼎诚盛新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the surface of polyurethane scraper blades on the market is smooth. This kind of scraper blade has a disadvantage that there are slight thin lines on the printed page of the toner cartridge. Generally, it is improved by adjusting the surface roughness of the magnetic roller, another component on the toner cartridge. , but this approach cannot completely eliminate the phenomenon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of preparation method of polyurethane scraper blade for printer, it comprises the following steps:

[0020] a. Mix silicon dioxide and distilled water in a mass ratio of 10:1 and stir evenly to prepare the mixture for later use;

[0021] b. Take 2300g of polyurethane and heat it to 85°C and carry out stirring and defoaming treatment. The defoaming time is 3min;

[0022] c. Add a curing agent to the polyurethane in step b according to the mass ratio of polyurethane: curing agent = 2, stir at a speed of 3200r / min for secondary defoaming treatment, and the secondary defoaming time is 45s;

[0023] d. Pour the material prepared in step c into the centrifuge bucket at a constant speed, heat the centrifuge bucket to a surface temperature of 125°C, and vulcanize for 3.75min at a speed of 580r / min;

[0024] e. Reduce the rotating speed of the centrifuge barrel to 150r / min, and use a spray gun to evenly spray the mixture prepared in step a to the surface of the material;...

Embodiment 2

[0028] A kind of preparation method of polyurethane scraper blade for printer, it comprises the following steps:

[0029] a. Mix silicon dioxide and distilled water in a mass ratio of 8:1 and stir evenly to prepare the mixture for subsequent use;

[0030] b. Take 1500g of polyurethane and heat it to 80°C and carry out stirring and defoaming treatment. The defoaming time is 2.5min;

[0031] c. Add a curing agent to the polyurethane in step b according to the mass ratio of polyurethane: curing agent = 4, stir at a speed of 2800r / min for secondary defoaming treatment, and the secondary defoaming time is 30s;

[0032] d. Pour the material prepared in step c into the centrifuge barrel at a constant speed, heat the surface temperature of the centrifuge barrel to 140°C, and vulcanize at a speed of 550r / min for 3min;

[0033] e. Reduce the rotating speed of the centrifuge barrel to 200r / min, and use a spray gun to evenly spray the mixture prepared in step a to the surface of the mate...

Embodiment 3

[0037] A kind of preparation method of polyurethane scraper blade for printer, it comprises the following steps:

[0038] a. Mix silicon dioxide and distilled water in a mass ratio of 12:1 and stir evenly to prepare the mixture for subsequent use;

[0039] b. Take 3000g of polyurethane and heat it to 90°C and carry out stirring and defoaming treatment. The defoaming time is 2min;

[0040] c. Add a curing agent to the polyurethane in step b according to the mass ratio of polyurethane: curing agent = 6, stir at a speed of 3500r / min for secondary defoaming treatment, and the secondary defoaming time is 60s;

[0041] d. Pour the material prepared in step c into the centrifuge barrel at a constant speed, heat the surface temperature of the centrifuge barrel to 130°C, and vulcanize at a speed of 600r / min for 4.5min;

[0042] e. Reduce the rotating speed of the centrifuge barrel to 180r / min, and use a spray gun to evenly spray the mixture prepared in step a onto the surface of the m...

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Abstract

The invention discloses a preparation method of a polyurethane squeegee for a printer and belongs to the technical field of printing materials. The preparation method includes the steps of a, mixing silicon dioxide with distilled water with stirring uniformly so as to obtain a mixture for standby use; b, heating polyurethane to 80-90 DEG C and performing stirring defoaming treatment; c, adding a curing agent into the polyurethane in the step b, stirring and performing secondary defoaming treatment; d, pouring a material prepared in the step c into a centrifugation barrel at a constant speed, heating and vulcanizing at a rotating speed of 550-600 r / min; e, uniformly spraying the mixture obtained in the step a on the surface of the material through a spray gun; f, subjecting the material in the centrifugation barrel to secondary vulcanizing for 20-30 minutes, and then slowing down to demould so as to obtain the polyurethane squeegee. The preparation method is simple in process steps and easy to implement, and the polyurethane squeegee prepared according to the preparation method is capable of eradicating fine lines effectively.

Description

technical field [0001] The invention relates to the technical field of printing materials, in particular to a method for preparing a polyurethane scraper blade for a printer. Background technique [0002] Usually, in image forming devices such as laser copiers, printers, and facsimile machines, the surface of the photosensitive drum is scanned by a laser beam carrying digital information, so that the surface of the photosensitive drum forms an electrostatic latent image with different potentials and then absorbs electrostatically charged toner to form toner. The image is transferred to paper. During the above printing or copying process, the cleaning blade is kept in contact with the photosensitive drum under a predetermined pressure to remove the residual ink on the photoreceptor, so as to ensure the clarity of photocopied documents. The materials used for drum scrapers are required to have good mechanical properties, antistatic properties, low elastic deformation and high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/06C08J7/00C08G18/32C08G18/10C08L75/04G03G21/00
CPCC08G18/10C08G18/3206C08J7/00C08J7/06C08J2375/04G03G21/0017
Inventor 唐飞易冬良俞宏志
Owner 中山市鼎诚盛新材料有限公司
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