Electromagnetic radiation is divided into high frequency and low frequency electromagnetic radiation, which are protected by different products. a) There are three types of fabrics that shield high-frequency electromagnetic radiation: 1. The blended woven anti-electromagnetic radiation fabric has the same appearance as the ordinary fabric. It is made of nano-metal shielding fiber and other fibers, and the shielding fiber is finer and softer than silk. The fabric has a detection effect of 99.9% (above 30dB) through the testing center, while retaining the softness, uniformity, breathability, washability, compactness and long service life of the common fabric, suitable for making maternity clothes. Workwear fabrics. [Parameter] Width: 58~59 inches; Thin, medium, and thick: Cotton thin fabric components: shielding fiber: 17%; cotton: 83%. Medium and thin fabric components: shielding fiber: 20%; cotton: 28%; polyester: 52%. Thick fabric components: shielding fiber: 30%; cotton: 25%; polyester: 45%. 2, the number of yarns of blended knit anti-electromagnetic radiation fabric: 32s; shielding fiber: 20%, 3, nano-ion shielding fabric shielding rate of 99.999999% (70dB or more), strong radiation protection, suitable for telecom transmitter room, base station, TV broadcast radar launch pad and other electromagnetic protection, can be used as a layer to make clothes, only gently Wipe, don't be embarrassed. ã€performance】 (I) Anti-electromagnetic radiation function: Electromagnetic radiation can cause immeasurable damage to the human nervous, immune, circulatory, and reproductive systems. The cloth can absorb electromagnetic radiation reflection in the range of 30MHZ~16GHZ and absorb more than 99.9%, which can effectively shield electromagnetic radiation generated by computers, household appliances, transmitting stations and the like. (2) Far-infrared health care, anti-static and bactericidal effects: It can promote and improve the superficial microcirculation of the human body, enhance the metabolism of the new city, and have a good health care effect on the body. ã€Detection method】 A. Conductivity measurement: It is detected by a multimeter that it has good conductivity, and ordinary fabrics have no conductivity; B. Use a fire to shield the cloth: the blended fabric will leave a layer of screened mesh; while the nano-ion cloth will leave a pile of metal powder. C. Hand-held electromagnetic radiation tester: When there is radiation, the red light is on. After blocking with radiation protection cloth, the green light is on, indicating that the radiation has been shielded. ã€use】 Blended electromagnetic radiation shielding fabrics are suitable for the production of various types of clothing, mainly for pregnant women, white-collar workers, housewives, children and the elderly, as well as people working in electromagnetic radiation sources such as electronics, computers, telecommunications, power stations, launch stations, anti-static, military, etc. Need to resist electromagnetic radiation interference and confidentiality of various instruments and meters. The conversion rate of dB and shielding ratio is: 3dB→50%; 6dB→75%; 9dB→87.5%; 12dB→93.75%; 30dB→99.9%; 70dB→99.9999%; Radiation Protection Knowledge-----Electromagnetic Wave Pollution is everywhere: Electromagnetic pollution refers to natural and artificial electromagnetic interference and harmful electromagnetic radiation. Since the Second World War, microwaves have spread throughout the Earth's atmosphere, and the number of microwave sources is growing at an alarming rate. Electromagnetic radiation is colorless, odorless and intangible, and can penetrate a variety of substances including the human body. When the intensity reaches 2MG (milli Gauss, the unit of magnetic flux density), it is harmful to the human body. The electromagnetic radiation intensity of ordinary household appliances exceeds the 2MG safety limit. As long as the electrical appliances such as household appliances, electronic equipment, office automation equipment, and mobile communication equipment are in operation and use, electromagnetic radiation will exist around it, and adjacent to high-voltage lines and substations. It is higher in the vicinity of radio stations, television stations, radar stations, and electromagnetic wave transmitting towers. While fully enjoying the convenience brought by electronic technology, people are gradually feeling its negative effects. How to reduce the intensity of electromagnetic radiation, prevent electromagnetic radiation pollution, protect the environment, and protect the health of the public has been urgently mentioned on the agenda. The harm of electromagnetic pollution to the human body: A large number of cases at home and abroad have confirmed that exposure to electromagnetic waves for more than a certain intensity and time will cause damage to the brain, cardiovascular, digestive, reproductive, immune, endocrine, blood circulation and other systems, which will cause chromosomal variation, induce tumors and other diseases. . Dr. MRepacholi of the World Health Organization pointed out: 'Children living near high-voltage transmission, the prevalence of leukemia is about 1.5 times higher, and the increase in risk is statistically significant'. People who are directly exposed to electromagnetic waves at frequencies above 3 GHz will die very quickly. The researchers used several female rats in a cage with a 50 Hz electromagnetic field. It was soon discovered that tumors grew in the mammary glands of the mice and found that the stronger the electromagnetic field, the faster the tumor cells multiply. People who work with computers, microwave ovens, and places in power distribution rooms and launch pads for a long time are about 43% more likely to have cancer than others. According to research data from the Texas Cancer Medicine Foundation, the residents living with high-voltage lines are 7.4 times more likely to develop breast cancer than ordinary people. Patients suffering from electromagnetic radiation have cancer cells growing 24 times faster than the average person. At present, there are more than 10 kinds of pathological effects caused by electromagnetic radiation, which are particularly harmful to human main organs, reproductive systems and genetics. Although the relevant departments of the state have formulated some control standards for radiation sources in recent years, the pollution of electromagnetic radiation to the environment cannot be ignored. In particular, the radiation hazards of electromagnetic waves have cumulative effects, so people's health status is still unpredictably affected by electromagnetic waves. The serious threat posed by radiation pollution, electromagnetic waves have become the fourth largest pollution after water, air and noise pollution. According to research reports and data analysis by many experts and authors at home and abroad, the proportion of cancer, infertility, fetal disability and visual impairment caused by electromagnetic wave pollution in the world has been increasing in recent decades. Therefore, in the past decade or so, how to effectively reduce and prevent the harm caused by electromagnetic radiation to humans has become a major focus of the world's urban residents. Electromagnetic radiation acts on the human body Experts believe that electromagnetic radiation mainly acts on the human body through thermal effects and cumulative effects: a. Thermal effect: The human body is heated by electromagnetic radiation, which affects the normal work of the internal organs. b. Non-thermal effect: Once the organs and tissues of the human body are disturbed by the external electromagnetic field, the weak current magnetic field in equilibrium is destroyed, and the human body suffers damage. c. Cumulative effect: The thermal effect and the non-thermal effect on the human body have not been able to be damaged by electromagnetic radiation before self-repair, and the degree of damage will accumulate, and it will become a permanent disease for a long time. 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When electromagnetic radiation reaches a certain intensity or radiates for a long time, it becomes electromagnetic pollution, causing damage to the central nervous system, immunity and reproductive system of the human body. The conclusion of the California Health Science Evaluation Agency: "Electromagnetic fields can have a negative effect on the human body to a certain extent, leading to headaches, insomnia, memory loss, elevated or decreased blood pressure, and boundary abnormalities in the heart. Long-term work in the environment, may cause adult malignant brain tumors, amyotrophic lateral sclerosis, miscarriage, cataracts, but also neurasthenia, depression and adult leukemia, to induce carcinogenesis..." Tzm Alloy Rod,Molybdenum Alloy Rod,Tzm Rod Tungsten,CNC Machine Tools Co., Ltd. , http://www.nstungsten.com