insulating glass water and gas sealing durability performance (2)

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

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°C土2°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.