PVB， Polyvinyl butyral is a product of the condensation of polyvinyl alcohol and butyral under acid catalysis,PVB film is a material used to make automotive glass interlayers,Mainly used for coatings, adhesives, and safety glass intermediate films, commonly used for car windshields and curtain wall glass. In actual production, the moisture content of the film has a significant impact on the quality of laminated glass. This experiment uses the V310S-KHF Karl Fischer moisture analyzer to measure the moisture content in PVB film by Karl Fischer heating injection.

- Instrument pictures -

- Instrument configuration -

1Karl Fischer moisture analyzer for Karl Fischer heating furnace

2Fully enclosed safety electrolytic cell components

3Measurement electrode, electrolysis electrode

4Electronic balance (0.1mg)

5Air pump

6、 10ml dry sample bottle

7Heated discharge pipe

- Technical parameters -

1Measurement resolution: 0.1ug (H2O mass)

2Measurement range: 3ug-99mg (H2O mass)

3Determination repeatability:>99.7% (1000 μ g pure water)

4Flow range: 0-100ml/min (0.1Mpa)

5Temperature range: Room temperature to 300 ℃

6Sample bottle: 10ml, 20ml optional

- Reagent -

1Electrolyte: Coulombic method, coulometric method, single Karl Fischer reagent equivalent: 1.5g/100ml, KFR-CO2

- Determination method -

1Inject the electrolyte into the electrolytic cell and the cathode chamber of the electrolysis electrode, raise the liquid level to the lower scale line, add a small amount of water, and then electrolyze to equilibrium.

2Connect the gas source to the heating furnace, put the dry sample bottle into the heating tank, set the temperature to 180 ℃, adjust the flow rate to 50ml/min, blow the sample bottle and pipeline for possible moisture, and wait for further balance.

3After balancing, remove the sample bottle and take out the sample. Use an electronic balance to weigh the agreed sample amount and place it in the sample bottle. Then click on the moisture meter to start measuring, and at the same time, place the sample bottle into the heating tank.

4Enter the weight of the sample to be weighed and wait for the final measurement result to be displayed after the measurement is completed.

- Measurement conditions -

1Temperature setting: 140 ℃

2Flow rate setting: 80ml/min

3Titration delay: 120S

4Drift deduction: automatic

5Blank deduction: Deduction

6Sample bottle: 10ml, dried

- Measurement results -

The blank value is 165ug,After four tests, PVB filmThe average moisture content of is 0.9126%, and the test results are as follows:

-Sample size 0.0839 g, water quality 932.1 ug, test result 0.9143%

-Sample size 0.0815 g, water quality 913.9ug, test result 0.9189%

-Sample size 0.0856 g, water quality 942.3 ug, test result 0.9081%

-Sample size 0.0869 g, water quality 956.4ug, test result 0.9107%

The V310S-KHF Karl Fischer oven moisture analyzer, with its accurate measurement results and convenient operation process, isPVB filmThe moisture detection provides strong technical support. Through precise controlPVB filmThe moisture content in the product ensures its reliability and stability.