跳至主要内容

Comparison of Test Methods for Moisture Permeability

       Textile moisture permeability refers to the performance of sweat through the fabric, also known as permeable steam, is reflected in the body when the heat to maintain the body heat and heat dissipation of one of the indicators of heat balance.Moisture permeability:(G / m2.h) or grams per square meter of 24 hours (g / m2.h) per gram per square meter of water vapor per unit area of ​​the sample in the specified time under the condition of maintaining the specified temperature and humidity conditions on both sides of the sample, M2.24h).Moisture:(G / m2.Pa.h) per square meter per square meter of water vapor per unit area of ​​the sample, which is vertically passed through the unit water vapor pressure under the condition of the specified temperature and humidity conditions. 

 TheGB, European standard, American standard, the Japanese standard has a moisture permeability test standards, these standards are tested moisture permeability index. From the method point of view, there are mainly absorbent method and evaporation method - positive cup / evaporation method - inverted cup.Moisture method (desiccant):The moisture permeable cup containing the hygroscopic desiccant and sealed with the fabric sample is placed in a sealed environment of the specified temperature and humidity. The moisture permeability of the sample is calculated according to the change of the moisture quality of the moisture permeable cup (desiccant absorb moisture) in a certain period of time Rate, moisture permeability unit in grams per square meter for 24 hours.

 Evaporation method (positive cup method and inverted cup method):The moisture permeability of the sample is calculated according to the change of moisture content (moisture evaporation) of the moisture permeable cup in a sealed environment with a certain temperature of distilled water and sealed with a sample of the fabric.The moisture rate is in grams per square meter of 24 hours. Evaporation method is divided into the cup method and the inverted cup method, the cup method in the test process, the moisture level will be placed on the instrument, and pour the cup is inverted cup on the instrument, so that distilled water and test fabric Reverse direct contact. The pouring method is generally applicable to waterproof breathable fabrics.The difference between the two methods is to test the amount of water volatilization, one is to test the amount of moisture absorption, both are assessed by the performance of sweat through the fabric.
标签：

评论

发表评论

此博客中的热门博文

How To Process The Elmendorf Tear Strength Test

The Elmendorf tear tester has been developed specially for the paper industry and is outstanding for simplicity of operation and high measurement accuracy. The exchangeable pendulum is equipped with a pneumatic sample clamp. The initiation and return of the pendulum, as well as sample cutting is completely automatic. The device is operated via an integrated touch screen, where the test method can be selected, specific settings can be adjusted, and, after the measurement, results and statistics can be  displayed.Each pendulum is supplied with the appropriate control weight so that, with the help of the service program, it can easily be checked for functionality and balance. The Elmendorf tear test Procedure:     Cotton fabric was taken.     Warp and weft direction of the fabric was identified.     Two strips were cut from the fabric in both directions having dimensions of 100 x 63.5 mm.     The sample was then fixed in the jaws of the ...
8 条评论
阅读全文

Comparative analysis of water-cooled and air-cooled xenon lamp aging tester

Xenon lamp aging test chamber is the core component of using the box full sunlight spectrum xenon lamp tube simulation, under different environmental conditions to simulate the material aging law, through the experimental results to evaluate weather resistance of materials and products. This paper focuses on the comparative analysis of the advantages and characteristics of the water-cooled and air-cooled xenon lamp aging testing machine. Air-cooled xenon lamp aging test machine : A circular wind is used to cool the heat-trapping xenon lamp tube. Air-cooled xenon lamp tubes used in air-cooled xenon lamp aging test box, generally a typhoon cold xenon lamp aging test chamber is equipped with three air-cooled xenon lamp tubes, and table 1 air-cooled xenon lamp weather-resistant chamber equipped with xenon lamp tubes. The power of the air-cooled xenon lamp tube is generally 1.8kw, and the length of the lamp tube is 340mm compared with that of the water-cooled xenon lamp. The diameter of...
发表评论
阅读全文

Correct Use Of Color Assessment Cabinet

Observation Angle: The following points are all the facilities required for the Color Assessment Cabinet , and the viewing Angle will directly affect the evaluation results. According to international standards, there are only two observable angles that can be used. They are: A, zero light source and 45 degrees observation (0 °, 45 °), the light from zero (vertical) incident Angle on the sample, sample watchers from 45 degrees. B, light source and 45 ° inclined channel 45 degrees of light source, zero observation (0 °, 45 °), the layout must use specific 45 degrees of inclined (45 ° Fixed Angle table) making from 45 degrees of light source on the samples, sample watchers from zero (vertical). The location of the 45 ° light samples: Regardless of any of the above observation methods, it is important to note that the test sample is placed in the middle of the light box as far as possible to reduce the influence of the external light source. In addition, the most important thing...
发表评论
阅读全文