The first material selected should have a very good ability to resist the special environment. In the hot summer, the air temperature is very high, and many switch materials melt because they cannot withstand high temperatures. This has a certain impact on the use of the product. In the cold winter, many materials will become very fragile because of low temperature, slightly touched will break, resulting in product damage. Therefore, the switch should consider the highest and lowest temperature that it can bear in the selection of materials. Only by ensuring that in extreme cases, the material will not be deformed and will not be damaged, can it be proved to be an optional material suitable for the production of switches. The same high humidity will also cause a certain degree of corrosion and damage to the material, many experiments have proved that if the room is not too large, such as in the summer in the south of the Meiyu days, many materials will fail, which is because the water vapor content in the air is more, and generated electricity, so it can not be more sensitive to be controlled. Therefore, the more the control switch used in extreme environments, the more need to strictly control the quality of the material, select some special materials that are more corrosion resistant, high temperature and humidity resistant, and only when the control switch is well grasped, can the strict control of the entire machine be formed.

Second, when choosing materials, we should also pay attention to whether it has a certain degree of waterproof and electrical insulation function. This is mainly for people's safety. At present, most of the household appliances are used in the home, so for people to use safety considerations, the choice of materials must be able to isolate electricity and waterproof. If the selected material is not very sensitive to electricity and water, it will cause a certain degree of safety hazards and bring great harm to human beings. In general, the light touch switch will be tested on the material several times before production to prove that it can be well insulated from water or electricity. Especially in special environments, such as the summer rainy season or when exposed to the sun, whether the machine has a decline in electrical insulation capacity needs to be taken into account before production. Only by ensuring safety as the first principle can we put into production in large quantities.

In addition, environmental performance is also an aspect that needs to be paid attention to when selecting materials. At present, China vigorously promotes environmental protection, which is not only for the long-term worry of our environment, but also for the sake of human health. Therefore, when choosing materials, it is not in line with China's national environmental standards, will not cause harm to human health need to carry out strict observation and experiments.