Introduction
This tester can be used to do high-precision oxygen permeability and water vapor permeability testing of film or sheet at the same time;
It adopts Coulometry theory for oxygen permeability test, and adopt international advanced electrolytic process theory for water vapor permeability test;
It is applicable for testing the oxygen transmission property and water vapor transmission property of plastic film, sheet and plastic bottles and bags etc. packaging containers in air or pure oxygen;.
Execution technical standard for oxygen permeability: GB/T 19789-2005, ASTM D 3985-1995, ASTM F 1927-1998, ASTM F 1307-1990, YBB00082003, ISO 15105-2:2003, DIN 53380-3-1998, JIS K-7126 ;
Execution technical standard for water vapor permeability: ASTM F1770, ASTM D1653-03, ASTM E96-00e1, ISO15106-3, JIS Z0208-1976, DIN 53122-1, ISO2528.
Testing principle
It adopts Coulometry theory;
The testing chambers including upper and nether parts, the sample film is fixed between the two chambers, the high pure oxygen (O2) circulate in the upper chamber of the film, and the high pure nitrogen (N2) circulate in the nether chamber of film, the oxygen molecules get through the film and spray to nitrogen in the nether chamber, and brought by the blowing nitrogen to the sensor, so, the tester then analyze the oxygen concentration as what the sensor tested and calculate the oxygen transmission value. But for the packing containers, the nitrogen circulate in the bottle and the air or oxygen circulate ouside the container
For water vapor permeability testing;
It is made according to the electrolytic process theory;
The testing chambers including upper and nether parts, the sample film is fixed between the two chambers, water vapor circulate in the upper chamber of the film, and dry gas circulate in the nether chamber of film, water molecules get through the film and spray to dry gas in the nether chamber, and brought by the blowing gas to the sensor, so, the tester then analyze the water vapor concentration as what the sensor tested and calculate the water vapor transmission value.
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Tech details:
Technical parameters
1) Oxygen testing range: 0.02~16500 cm3 / m2/ day (with largen the test chamber, the max testing range can reach 260000cm3/m2·day)
2) Oxygen test accuracy: 0.001 cm3 / m2/ day
3) Humidity test range: 0.02 ~ 10,000 g/m2﹒24h
4) Humidity test accuracy: 0.001g/m2﹒24h
5) Temperature control range: 5~50℃
6) Temperature control accuracy: ±0.01℃
7) Humidity control range: dry degree:= 0﹪RH, Humidity=5~95%RH , 100%RH
8) Humidity control accuracy: ±1%RH
9) Specimen size: Φ80mm, transmission area 50.24cm2, no international standard about area
10) Specimen no: 4 pcs
11) Specimen thickness: ≤2mm
12) Test environment condition: room temperature (standard temperature is 23℃)
13) Pressure: 0.2~0.3MPa
14) Cut air interface: 1/8 inch
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