Gester Instruments | Professional Textile, Footwear and PPE Testing Equipments Manufacturers Since 1997
QB/T1811-1993 Leather Water Vapor Permeability Test1
This standard specifies the test principle, test equipment, sample preparation, test procedure, calculation and test report height of leather under standard conditions. This standard applies to all leathers. Reference standard GB/T4689.1 Parts and marks of leather laboratory samples GB/T4689.2 Air conditioning test principle of test pieces for leather physical property testing Under certain temperature and humidity conditions, the leather test piece is fixed on the mouth of the moving test bottle , The test bottle is filled with solid desiccant. When the test bottle moves, the water vapor is absorbed by the solid desiccant through the leather test piece. Weigh the test bottle within a specified time, and it can be determined that the water vapor passes through the leather and is dried during this period. The weight absorbed by the agent. Sample 1. According to the No. 10 sample part specified in GB/T4689.1, remove the sample with a knife die. 2. Air conditioning the sample according to the provisions of GB/T4689.2. Test step 1. Put half of the freshly dried silica gel (59.0±0.5)g is put into the test bottle, the sample is fixed on the bottle mouth with the face inward, then the test bottle is fixed on the test bottle holder, and the instrument is started. 2. Use a vernier caliper to measure the inner diameter of the bottle mouth of the second test bottle in two mutually perpendicular directions, and mark the average diameter d. Accurate to 0.1mm.3, if necessary, between the bottle mouth and the test piece Add a washer or apply a layer of beeswax, or take other anti-leakage measures. 4. After the instrument has been rotated for 16 hours, stop and remove the first test bottle. Put the other half of the freshly dried silica gel (59.0±0.5) g into the second test bottle, remove the sample on the first test bottle as soon as possible and fix it on the second test bottle, using the face inward. 5. Weigh the second test bottle, note the weighing time, and then fix the second test bottle on the instrument. 6. When the instrument rotates for 7 hours, stop, remove the test bottle, weigh, and record the weighing time. Test result P=7369m/(d?×t) In the formula: P——Water vapor permeability, mg/(cm??h);m——Mass added by weighing the bottle twice, mg;d——The diameter of the bottle mouth, cm;t——The time interval between two weighings is small. Test report The test report includes the following contents: a, the name and source of the sample to be tested; b. the arithmetic mean of the results of each measurement; c. the preservation of the sample and the test conditions; d. Factors affecting.
Clouds of tensile tester manufacturers failures surround the world of tensile tester manufacturers in particular, simply because people don’t pay as much attention to the textile testing equipment as they should do.
A detailed plan must be developed if we hope to reach your profitability goal. Once we have a certain figure in mind, GESTER International Co.,Limited and our staff need to determine all the steps necessary to reach that goal and act on them.
This is crucial when you need to maintain innovative information in textile testing equipment.
This is especially true when GESTER International Co.,Limited have got a global business that's building bridges between manufacturers and customers across the globe.
[拓展名称] include a great variety of devices with a wide range of complexity: from simple tensile tester manufacturers used since prehistoric times to the complex of modern mechanized tensile tester manufacturers.
Quick links