DIN 53122 PDF
DIN Determination of the water vapour transmission rate of plastic film, rubber sheeting, paper, board and other sheet materials by gravimetry. DIN Testing of plastics and elastomer films, paper, board and other sheet materials – Determination of water vapour transmission. DIN ENG_机械/仪表_工程科技_专业资料。Determination of the water vapour transmission rate of plastic film, rubber sheeting.
|Genre:||Health and Food|
|Published (Last):||28 July 2017|
|PDF File Size:||17.38 Mb|
|ePub File Size:||7.68 Mb|
|Price:||Free* [*Free Regsitration Required]|
Cookies make it easier for us to provide you with our services. After reaching the desired temperature, the measurement is started. These normative references are cited at the appropriate places in the text, and the titles of the publications are listed below. Water or 5322 vapour. Balance, capable of weighing to an accuracy of 0,1 mg.
A desiccator as shown in figure 1, for example, in a controlled-temperature or air-conditioned room may be used as evaporation chamber. Please contact us for dun on special effects and requirements for the samples at high pressures. The detection limit sin depends on the nature and thickness of the specimen.
If these conditions are fulfilled, the water vapour transmission rate, WVTR, of similar samples of different thickness is inversely proportional to the thickness, i.
The concentration is determined and the permeation rate is calculated. The water that has permeated through the sample is carried to the detector by a second carrier gas.
In the case of highly transmissive samples, the number of dishes in the evaporation chamber may be kept low to ensure a constant and uniform distribution of humidity within the tolerances for the test atmosphere concerned see subclause 8.
We recommend the measurement of three independent samples per test minimum number not regulated by the standard. If this requirement cannot be satisfied because the samples have a high water vapour transmission rate, this shall be recorded in the test report. Also possible are temperature profiles nonisothermic measurements for the determination of morphology changes and the influence of media and pressure on polymer properties. Based on this method Mecadi offers further examination to determine gas solubilities sorption and desorptionddin coefficients and the measurement of break through times through barriers.
In keeping with current practice in standards published by the International Organization for Standardization ISOa comma has been used throughout as the decimal marker. The same phenomenon will be observed if the humidity of the test atmosphere varies considerably during weighing. Please inform us, if your samples tend to mechanical di under applied 5312 of the test gas or the sealings. If the wax is spread out on the rims with the aid of a hot spatula, check that the seal is still intact after the sealant has cooled.
A tempered test chamber is flushed by a carrier gas with a defined humidity.
Water vapor permeability (electrolysis method) DIN / DIN A
Furthermore interactions between media and polymer can be investigated. We also do the test sample manufacture for you.
Testing method aplicable to nearly all materials, e. The specimens shall be uniform in thickness, representative for the material rin free of pinholes and folds.
For different test gases and type of samples we use different sized samples.
They shall not exhibit any surface inhomogeneities e. This can be remedied, for example, by increasing the mass of desiccant and repeating the test.
In blank tests, examine samples having low permeation rate and large thickness e. If the two surfaces of the sample are not the same, the test area, i. Subtract the blank values from the values measured cin the sample dishes having undergone the same treatment.