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Device and method for measuring air permeability of isolation material

A gas permeability and barrier material technology, which is applied in the field of devices for measuring gas permeability of barrier materials to achieve the effect of reducing the background gas pressure value and reducing the leakage rate

Inactive Publication Date: 2008-08-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The installation and sealing method of the barrier material in this patent adopts a single sealing ring structure, the input of the water vapor gas sample adopts the carrier gas transmission mode, and the high vacuum pump adopts a turbomolecular pump (or diffusion pump and cryogenic condensation pump), without involving double vacuum sealing structure and Measures to limit the effective pumping speed of the measuring chamber by the vacuum system

Method used

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  • Device and method for measuring air permeability of isolation material
  • Device and method for measuring air permeability of isolation material

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0056] The double-vacuum sealing structure of the barrier material to be tested and the vacuum chamber seal is shown in Figure 2, using the vacuum chamber flange 26, the gas chamber flange 36, and the inner and outer sealing rings (28, 27) of the vacuum chamber flange and the gas chamber The flange 36 compresses and seals the measured barrier material film or sheet 29 between the vacuum chamber 25 and the gas chamber 37, and a vacuum channel is arranged between the inner and outer sealing rings (28, 27) of the vacuum chamber flange 26 31. The vacuum chamber flange 26 and the gas chamber flange 36 are connected and pressed by connecting bolts 35, so that the measured barrier material clamped between the vacuum chamber flange 26 sealing rings (28, 27) and the gas chamber flange 36 The film or sheet 29 is sealed between the vacuum chamber 25 and the gas ch...

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Abstract

The present invention discloses an isolating material air permeability measuring device which comprises a double vacuum sealing structure permeating gas sampling device and an isolation material air permeability measuring device of the current limiting air extraction pipeline, the device comprises a permeation gas sampling device with double vacuum sealing structure, an ultrahigh vacuum system, a mass spectrograph and a calibrating device, wherein the permeation gas sampling device is connected to the mass spectrograph 3, the current limiting air extraction pipeline 6 and the calibrating device 19-24 through the flange 2 and the vacuum valve 4. The device can overcome the defects of low signal-to-noise ratio when the mass spectrum signal of the permeation air is measured and difficulty for measuring the isolation material with low air permeability existing in the existing technique, and has the characters of quick measuring speed, being able to measure the permeability rate of all gases to the isolation material.

Description

technical field [0001] The invention relates to the measurement of the gas permeability of barrier materials and food packaging materials used in organic light-emitting display devices (OLEDs), in particular to a device and a measurement method for measuring the gas permeability of barrier materials. Background technique [0002] One of the main bottlenecks of organic light-emitting display devices is that the lifetime and stability of organic light-emitting devices cannot meet practical requirements. One of the main problems affecting the life and stability of organic light-emitting devices is that organic light-emitting materials are particularly sensitive to the intrusion of water vapor and oxygen. Once organic light-emitting film materials and cathode materials come into contact with trace amounts of water or oxygen, black spots will form, making The luminous brightness of the OLED is reduced, the turn-on voltage is increased, and the service life is significantly reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24G01N27/64
Inventor 李军建
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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