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Improved adsorbent articles for disk drives

A technology for disk drives and products, applied in chemical instruments and methods, reducing physical parameters of carriers, other chemical processes, etc., and can solve problems such as damage

Inactive Publication Date: 2010-01-20
GORE ENTERPRISE HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, silicone is a very hard material that can cause serious damage if it comes into contact with the head or disk

Method used

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  • Improved adsorbent articles for disk drives
  • Improved adsorbent articles for disk drives
  • Improved adsorbent articles for disk drives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] Activated carbon with part number 3042 was obtained from Calgon Carbon Corporation. 100 grams of carbon are further processed to achieve oxygen-containing functional end groups on the surface of the carbon. The treatment process includes: soaking the activated carbon with a solution of 560 grams of ammonium persulfate and 100 milliliters of sulfuric acid in 1000 water for 2 hours, and then washing multiple times Remove residual solution on the carbon and dry. Wash or rinse with deionized water until the remaining reagents on the carbon are removed. Determination by elemental analysis and Boehm titration yielded results: 17.6% by weight of oxygen and 175.3 milliequivalents / 100 g total acid groups. The water weight adsorption and organic vapor weight adsorption tests were also performed, and the results were obtained: the moisture capacity of 25%RH-45%RH was 17.2% by weight, and the TMP capacity was 20.9% by weight. This process beneficially compares adsorbents used in d...

Embodiment 2

[0110] The absorbent felt VAF100 was purchased from Shanghai First Activated Carbon Fiber Co., Ltd. (Shanghai, China, 200436). The results of elemental analysis and Boehm titration are: 11.39% by weight oxygen and 77.4 meq / 100g total acid groups.

[0111] According to the water vapor weight adsorption and organic matter vapor weight adsorption tests, the adsorbent is determined, and the result is that the moisture capacity of 25%RH-45%RH is 22.2% by weight, and the TMP capacity is 23.8% by weight.

[0112] Table 2 reflects the moisture capacity of the example and the adsorption device taken out from the commercially available disk drive at the medium RH. Table 2 also shows that the oxygen content and acidity of the examples are increased compared with the known adsorption device.

[0113] Table 2

[0114]

Embodiment 3

[0116] The prepared adsorption assembly has the following characteristics: an adhesive is coated on both sides of a polyester film with a thickness of 0.003 inches. The adhesive is a high temperature acrylic pressure sensitive adhesive with a thickness of 0.0015 inches. This two-sided adhesive structure was obtained from Adhesives Research Company (Glenn Rock Pennsylvania).

[0117] Prepare 80% by weight activated carbon and 20% by weight PTFE absorbent core. The material mixture is a co-coagulant according to the method described in US Patent No. 4,985,296. The material was then kneaded into a dough and rolled with a metal rolling pin into a thick sheet about 350 mils thick, 5 inches long, and 3 inches wide. The sheet was heated to 60°C, and then cross-calendered into a belt eight consecutive times. The speed of all rolling downwards is approximately 1.52 meters per minute. The first two rolls used a nip setting of 150 mils, first along the x-axis and then along the y-axis. ...

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Abstract

An improved activated carbon adsorbent for disk drives that has improved or increased adsorption capacity for moisture between 25% RH and 45% RH while optionally maintaining good capacity for organic vapors, acid gasses and moisture at 95% RH.

Description

Invention field [0001] The present invention relates to a device for filtering, adsorbing or removing contaminants on a disk drive. Background of the invention [0002] Many closures containing sensitive devices or equipment must maintain a very clean environment for normal operation. Examples include: closures containing photosensitive surfaces or electronic connectors that are sensitive to particulate and gaseous pollutants that may interfere with mechanical or electronic operations; data recording devices, such as computer hard drives that are sensitive to particles, organic vapors, moisture, and corrosive vapors Drives; and electronic control boxes, such as those used in automobiles that are sensitive to moisture accumulation and corrosion, and liquid and vapor contaminants. The contaminants in these closures (hereinafter collectively referred to as "disk drives") originate from the inside and outside of the closures. For example, for computer hard drives, damage may be the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B33/14B01J20/20
CPCG11B33/1453
Inventor R·H·吉杜马尔X·陆G·S·谢利
Owner GORE ENTERPRISE HLDG INC
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