Working principle of shielding room: Computers, communicators, and electronic equipment will generate electromagnetic waves of certain strength during normal operation. The electromagnetic waves may interfere with other equipment or be received by special equipment to steal their work. At the same time, these electronic devices also need to ensure their normal operation in an electromagnetic envir...
The glow wire test is to test the stability of electronic and electrical products at work. The glow wire itself is actually a fixed-size resistance wire ring. During the test, it is heated to the specified temperature with electricity, so that the tip of the glow wire contacts the sample to reach the standard required time, and then observe and measure its state. The test range depends on the spec...
Melt-blown non-woven fabrics are widely used in the field of filter materials, and can be described as the “heart” of the mask structure. The average fiber diameter of polypropylene melt-blown fabrics is 2 to 5 μm, and the droplets with a particle size of more than 5 μm in the air can be blocked. But can only block less than 70% of the particles. Even if the barrier rate is increas...
Mr. Wang was the earliest batch of melt-blown fabric bosses in Yangzhong. Due to the strict management of the government and the strict requirements on the quality of melt-blown fabrics by mask manufacturers, Mr. Wang is talking to engineer Liu, an expert on melt-blown fabrics who Secretary Zhang has invited today, to talk about how to transform his several production lines. Secretary Zhang: B...
Recently, a news broke the circle of friends: the United States released a test report on Chinese masks, and over 80% of Chinese companies were suddenly “deprived” of export authorization! Late at night on May 7th, Beijing time, the US Centers for Disease Control and Prevention (CDC) suddenly issued a test report for Chinese masks through its official website, and 105 Chinese masks wer...
As the US FDA/CDC canceled nearly 80% of the mask whitelist companies in China, it encountered the Canadian government requiring dozens of Chinese mask factories to recall unqualified products on their own. Since May, many people in the mask chain industry have discussed that this industry has entered the bottom. We believe that as long as the new crown special drugs or vaccines do not appear, glo...
Ultraviolet rays are rays of sunlight with a wavelength of 100 to 400 nanometers (nm). English is ultraviolet, ultra- means above, beyond. The frequency of ultraviolet rays in the solar spectrum is higher than that of visible rays. Can be divided into UVA (ultraviolet A, wavelength 320-400 nm, long wave), UVB (wavelength 280-320 nm, medium wave), UVC (wavelength 100-280 nm, short wave). Among them...
Ultraviolet lamps are a type of light source that can produce ultraviolet light with a large effective range. In fact, there are also ultraviolet rays in more general light sources, and the sun is the most prominent. As for the general tungsten lamp, there is also near ultraviolet light of about 320nm in the possible range of ultraviolet transmission of glass, and it can be farther if a quartz bul...
Medical ultraviolet lamps mainly sterilize indoor air. There are two methods: indirect irradiation and direct irradiation. Indirect irradiation method: the use of high-intensity ultraviolet air sterilizer has the advantage of reliable disinfection effect and can be used when there are people indoors. The disinfection time is generally 30 minutes. The principle of the shooting method is to suck the...
中文简体
English
Русский
Español
Português
Türkçe
العربية
Deutsch
Polski
Italiano
Français
한국어
ไทย
Tiếng Việt