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Low adhesion sol gel coatings with high thermal stability for easy clean, self cleaning printhead front face applications

A low-adhesion, coating technology, applied in the direction of coating, printing, metal material coating process, etc., can solve the problem of shortening the service life of inkjet printing heads and other issues

Inactive Publication Date: 2012-07-11
XEROX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these steps are undesirably time-consuming, energy-consuming, and / or use excess ink, thereby reducing the useful life of the inkjet printhead

Method used

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  • Low adhesion sol gel coatings with high thermal stability for easy clean, self cleaning printhead front face applications
  • Low adhesion sol gel coatings with high thermal stability for easy clean, self cleaning printhead front face applications
  • Low adhesion sol gel coatings with high thermal stability for easy clean, self cleaning printhead front face applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In a glass bottle, about 1.5g Fluorolink S10 (obtained from Solvay-Solexis) was dissolved in approximately 15 mL of hexafluoropropanol solvent, followed by the addition of approximately 0.1 g of water and approximately 2 drops of trifluoroacetic acid (TFA) as a catalyst. The contents were homogenized, left at room temperature for approximately 24 hours, and then coated onto a polyimide substrate using a drawbar applicator.

[0047] Coating 1 was cured by increasing the temperature from room temperature to about 290°C at a rate of about 5°C / min and then holding at about 290°C for about 30 minutes.

[0048] Coating 2 was cured by increasing the temperature from room temperature to about 310°C at a rate of about 5°C / min and then holding at about 310°C for about 30 minutes.

[0049] Coating 3 was cured by increasing the temperature from room temperature to about 325°C at a rate of about 5°C / min and then holding at about 325°C for about 30 minutes.

[0050] The contact and...

Embodiment 2

[0056] Embodiment 2 (comparative example)

[0057] A stainless steel printhead was prepared using the method described in US Pat. No. 5,867,189. The orifice plate was coated with PFA using electron beam sputtering technique to form coating 4 . The contact angle and sliding angle of coating 4 were measured according to the steps in Example 1, and the data are summarized in Table 2. In contrast, the contact angle of Coating 4 was similar to that of Coatings 1-3; however, the sliding angle of Coating 4 was significantly greater than that of Coatings 1-3. A low sliding angle translates into a low adhesion between the ink drop and the coating surface, and a high sliding angle translates into a high adhesion between the ink drop and the coating surface.

[0058] Table 2

[0059]

Embodiment 3

[0061] Ink aging tests were performed by immersing Coating 1 in a molten cyan, magenta, yellow, black ink mixture at about 140°C for about 2 days. The contact and sliding angles before and after ink aging were then measured and summarized in Table 3. The data shows that the coating 1 manufactured according to the procedure in Example 1 exhibits a high contact angle and a low sliding angle after 2 days of ink immersion, and it is robust against ink aging.

[0062] table 3

[0063]

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PUM

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Abstract

Various embodiments provide oleophobic, low adhesion coatings with high thermal stability and methods of forming and using them in an ink jet printhead, wherein the oleophobic, low adhesion coatings can include a sol-gel cross-linked coating by a self-condensation process of at least a silane-functionalized perfluoropolyether based polymer precursor.

Description

technical field [0001] The present invention relates to low adhesion coatings and methods of forming and using them in inkjet printheads. Background technique [0002] Conventional inkjet printers create an image on an image substrate by melting ink and delivering the melted ink to a printhead ink reservoir, which is then transferred to the image substrate by a plate in the printhead. The printhead typically has a front face in which nozzle orifices are defined, through which liquid ink is ejected as droplets onto the recording substrate. The image substrate includes the final print medium (eg, paper) or intermediate transfer member (eg, imaging drum). Thus, solid ink images are printed directly on paper or first printed on an imaging drum and then transfixed to paper. [0003] Inkjet print heads become contaminated due to ink wetting or drool. This contamination results in partial or complete clogging of the nozzle holes, which prevents ink droplets from being ejected fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/12C08G77/46B41J2/14
CPCB41J2/1606B41J2/161C08G2650/48C08K5/5406C08G65/336C09D171/00B41J2/164C08G65/007B41J2/175C23C28/00
Inventor 瓦伦·桑巴伊科克-绮·劳赵洪萨曼斯·休
Owner XEROX CORP