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insulating glass water and gas sealing durability performance (2)

2021-09-30 15:07

In this paper, the appearance of insulating glass Water and gas sealing durability   performance does not meet the standard requirements is described and analyzed.


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1 Detection principle

The insulating glass water permeability index is expressed in i and lav as follows:

1= (Tf - Ti) / (Tc-Ti)

Formula: I-the water permeability index of a single insulating glass,   《0.25;   the average value of the water permeability index of a lav- -5 insulating glass, 《0.20;

Tf-Final moisture content of desiccant of 5 insulating glass samples after tf-water   seal   durability test;

Ti-Average of the desiccant initial moisture content of four insulating glass samples;

Tc-Average of the standard water content of the desiccant from 2 hollow glass samples.


2 Detection procedures

Fifteen pieces of insulating glass of the size of 510 mmx360 mm,   placed   for   1   day   in   the test environment, numbered in the order of dew points from high to low; The desiccant of samples no. 1 and 15 does the standard moisture content test, and the desiccant of samples no. 7,8,9 and 10 does the initial moisture content test,Samples 4,5,6,11 and 12 went through 2 stages:

① for 56 cycles, and every 12 h for a temperature cycle, the temperature ranging from

18°C2°C to 531°C±1°C,The lifting temperature rate is 14 °C/h±2 °C/h;

② temperature at 58 °C ±1°C,   relative humidity>95% environment   was   maintained   for 7 weeks, the final moisture content and moisture permeability   index   were   calculated after removal from the test box.


In Figure

1 is the stage 1 high and low temperature cycle test;   2, the maximum time interval between moving the sample from stage 1 test box to stage 2 test box is 4h;  

3 is the test of constant temperature and humidity in stage 2.