Moisture permeability test of the hottest silicone

moisture permeability test of silicone elastic waterproof coating

Abstract: the service environmental conditions of silicone elastic waterproof coating in architectural coatings are much worse than those of interior wall coatings, and its moisture permeability directly affects the service effect and service life. Although the re coating of silicone elastic waterproof coating is simpler than that of other materials, it is still much more difficult than that of interior wall coating. Therefore, at present, silicone elastic coating has the trend of developing towards high weather resistance and moisture permeability, and the moisture permeability test of silicone elastic coating has increasingly attracted the attention of manufacturers

key words: silicone elastic waterproof coating moisture permeability test, moisture permeability, water vapor transmission, w3/060 water vapor transmission tester, G port control source program the following: b/t17146, ISO

text:

although there are various ways to protect and decorate buildings, architectural coatings are characterized by rich colors, good decorative texture, high construction efficiency and convenient maintenance, It has become an irreplaceable decorative material for modern building decoration. The use environmental conditions of silicone elastic waterproof paint in architectural paint are much worse than that of interior wall paint, which makes the single seat cockpit of the aircraft developed by kestron use conditions much worse, and its moisture permeability directly affects the use effect and service life. Although the repainting of silicone elastic waterproof coating is simpler than that of other materials, it is still much more difficult than that of interior wall coating. Therefore, at present, silicone elastic waterproof coating has the trend of developing towards high weather resistance and moisture permeability, and the moisture permeability test of silicone elastic waterproof coating has increasingly attracted the attention of manufacturers. Next, combined with the water vapor transmittance tester, Labthink blue light briefly introduces the moisture permeability test of silicone elastic waterproof coating

I. significance of moisture permeability test of silicone elastic waterproof coating

if the moisture permeability of silicone elastic waterproof coating is not appropriate, after it is painted on the building, the water vapor generated in the room cannot be emitted, which will condense and condense in the wall, resulting in the decline of heat insulation, wood decay, reduced component strength, mildew and other ills; In addition, the cold winter in northern China will lead to high moisture content of the exterior wall substrate, causing freezing damage, resulting in damage to the silicone elastic waterproof coating and loss of protection and decoration. It can be seen that the moisture permeability of silicone elastic waterproof coating directly affects its service effect and service life, so it must be tested accordingly

II. Moisture permeability test of silicone elastic waterproof coating 1: Ring stiffness testing machine main motor source non bright test method

at present, there are two main standards for the moisture permeability test of silicone elastic waterproof coating: gb/t17146 and ISO. The test principles specified in the two standards are the same, but the test conditions are slightly different. Gb/t17146 is to seal the coating external insulation template (painted face up) on the test cup. The cup is pre filled with a certain amount of water. After weighing, it is placed in a constant temperature and humidity environment with 23 ℃ and 50% relative humidity. There is a humidity difference between 100% relative humidity of the water in the cup and 50% relative humidity in the laboratory. The water vapor in the cup will diffuse indoors. The water vapor transmission rate can be calculated by weighing the weight of the test cup regularly; ISO uses saturated ammonium dihydrogen phosphate solution instead of water, and its relative humidity is constant at 93%, forming a humidity difference with the laboratory relative humidity of 50%, resulting in water vapor flow. The calculation method is the same, and the unit is g/m2 day

of course, after the moisture permeability index of silicone elastic waterproof coating is qualified, other indexes need to be controlled to ensure its service effect and service life. For more information about relevant testing instruments, please call Jinan Languang or the login officer