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Silica gel composite membrane for collecting biological texture image, preparation method and purpose thereof

A texture image, composite film technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problem of unreported quality of fingerprint image collection

Active Publication Date: 2013-04-24
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are many fingerprint identification technology products at home and abroad, but there is no report on the research on improving the quality of fingerprint image collection.

Method used

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  • Silica gel composite membrane for collecting biological texture image, preparation method and purpose thereof
  • Silica gel composite membrane for collecting biological texture image, preparation method and purpose thereof
  • Silica gel composite membrane for collecting biological texture image, preparation method and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Prepared according to the composition formula described in Table 1, stirred with a stirrer at 2000 rpm for 15 minutes, and stood for 10 minutes to defoam to obtain the desired room temperature vulcanized silicone rubber composition.

[0056] Table 1 Composition Formulation

[0057] components

Dosage / g

Vinyl terminated polydimethylsiloxane

100

Fumed silica

10

Methyl hydrogen silicone oil

3

Chloroplatinic acid catalyst

0.1

Xylene

10

Leveling agent BYK-323

0.4

Defoamer BYK-066N

0.2

[0058]The polyethylene terephthalate film was corona-treated at a voltage of 15000V and an output power of 1000W, and then the above-mentioned room temperature vulcanized silicone rubber composition was uniformly coated on the corona-treated polyparaphenylene with a 100 μm wire bar. The surface of the ethylene glycol diformate substrate film 3; after coating, bake at 65° C. for 4 hours to fully cur...

Embodiment 2

[0061] Prepared according to the composition formula described in Table 2, stirred with a stirrer at 2000 rpm for 15 minutes, and stood for 10 minutes to defoam, to obtain the desired room temperature vulcanized silicone rubber composition.

[0062] Table 2 Composition Formulation

[0063] components

Dosage / g

Hydroxy-terminated polydimethylsiloxane

100

Precipitated silica

20

Methyltriethoxysilane

8

Dibutyltin dilaurate

2

Leveling agent BYK-333

0.4

Defoamer BYK-A530

0.2

Non-ionic antistatic agent

0.3

[0064] Coat a layer of adhesion promoter on the surface of the polycarbonate film, let it dry for a period of time, then fix it on a spin coater, and uniformly coat the above room temperature vulcanized silicone rubber composition at a rotation speed of 2500 rpm coated on the polycarbonate substrate film 3 treated with primer, and cured at 23° C. for 24 hours after coating. Finally, ...

Embodiment 3

[0067] Prepared according to the composition formula described in Table 3, stirred with a stirrer at 2000 rpm for 15 minutes, and stood for 10 minutes to defoam, to obtain the desired room temperature vulcanized silicone rubber composition.

[0068] Table 3 Composition Formulation

[0069] components

Dosage / g

Vinyl-terminated polymethylphenylsiloxane

100

Amorphous silica

50

Methyltriacetoxysilane

6.6

Chloroplatinic acid

0.7

Xylene

50

Leveling agent BYK-350

0.67

Defoamer BYK-320

0.33

[0070] After the plasma treatment of the polymethyl methacrylate film, the above-mentioned room temperature vulcanized silicone rubber composition is uniformly coated on the surface of the plasma-treated polymethyl methacrylate substrate film 3 with a 100 μm wire bar; Bake at 65°C for 4 hours to fully cure the silica gel, and finally a composite film with a smooth surface, high light transmittance, an...

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Abstract

The invention discloses a silica gel composite membrane for collecting a biological texture image and a preparation method thereof. The preparation method comprises the following steps: coating a liquid silica gel on the surface of a surface-treated substrate film by using coating technologies such as spin coating or blade coating, controlling the thickness of the silica gel membrane through adjusting a coating process, and finally curing the silica gel membrane so as to form the silica gel composite membrane. The silica gel composite membrane disclosed by the invention has the advantages of high light transmittance, low haze, high hydrophobicity, scratch resistance and high rebound elasticity; and through an electrostatic effect, the silica gel composite membrane is adsorbed to the surface of a glass window of a fingerprint (or palm print) image collector; therefore, the image collecting sensitivity is enhanced, the imaging quality is improved, the image analysis difficulty of image processing software is reduced and the identification rate of the fingerprints (or palm prints) is increased; and in a dry or wet environment, the silica gel composite membrane is especially effective for improving the fingerprint (or palm print) image collecting quality.

Description

technical field [0001] The invention relates to a silica gel composite film, a preparation method and its use. The silica gel composite film can be used to collect biological textures (fingerprints or palm prints) and significantly improve the quality of biological texture images (fingerprints or palm prints), especially in dry or in a humid environment. Background technique [0002] With the development of society and the enhancement of public safety awareness, biometric texture collection technology (fingerprint and palmprint recognition) has become a hotspot of identification technology due to its safety, convenience and ease of operation, especially fingerprint recognition technology is widely used. Fingerprint recognition technology is to use image processing software to find characteristic nodes from the collected images, including the starting point and end point, joint point and bifurcation point of ridges. The quality of fingerprint feature point extraction depends...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/18B32B27/28B32B33/00C08L83/07C08L83/06C08L83/04
Inventor 褚鹏飞周凌云张晖张忠
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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