Moisture permeable cup with double sealing ring gas isolation sealing structure and its using method

Abstract

The invention discloses a permeating cup with double joint ring air separating leakproof structure, which comprises a covering board 2 of permeating cup , a flange 3 of permeating cup and a pre-testing film of separating material or a thin section 7. The invention is characterized in that: firstly, the flange 3 of permeating cup is provided with an inside sealing ring 4 and an outside sealing ring 5, and an air groove 6 is arranged between the two parts; secondly, the pre-testing film of separating material or thin section 7 is press sealed between the flange 3 of permeating cup and the covering board 2 of permeating cup by a fixing bolt 8, and the airtight packing is produced at the contact part between the inside sealing ring 4 and the outside sealing ring 5 or pre-testing film of separating material or thin section 7. The permeating cup can obviously reduce the vapor leakage ratio of the pre-testing film of separating material or a thin section and the sealing position of permeating cup, which improves the accuracy of measuring the vapor leakage ratio of separating material (e.g. glass, metal, Brix film, etc) by the WVP method.

Description

technical field [0001] The invention relates to a measuring device and a measuring method for the water vapor permeability of packaging materials for organic light-emitting display devices and food packaging materials, in particular to a moisture-permeable cup with a gas isolation and sealing structure with double sealing rings and its use method. 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 increas...

AI Technical Summary

Problems solved by technology

This technical solution can effectively measure the water vapor permeability of the film, but there are also some defects: the moisture permeable cup adopts a single-layer sealing ring structure or a wax seal structure, and the barrier material film or sheet to be tested is sealed on the moisture permeable cup mouth , during the measurement process, there are two main sources of water absorbed by the moisture absorbent in the moisture-permeable cup: (1) the penetration of external water vapor into the film or sheet of the barrier material to be measured, and the amount of water penetration in this part is the purpose of measurement; (2) External water vapor leaks through the seal of the sealing ring. The weight gain of the hygroscopic agent caused by this part of water will lead to measurement errors. Since the moisture-permeable cup is placed in a high-temperature and high-humidity environment, when using a single-layer sealing ring to seal , the outer side of the sealing ring is in a high-humidity environment, and the water vapor concentration is high; the inner space of the moisture-permeable cup inside the sealing ring has a very low water vapor concentration due to the hygroscopic effect of the high-efficiency moisture absorbent, and the water vapor on both sides of the sealing ring The difference in partial pressure is very large, resulting in a significant increase in the leakage rate of external water vapor permeating and leaking into the moisture-permeable cup through the sealing ring, resulting in a significant increase in the error of the measurement results of the water vapor permeability of the barrier material

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