Formulating Standards For Radiation Protection Clothing Related Products Is Imperative. 1

The widespread use of household appliances such as computers, induction cooker and microwave ovens has made electromagnetic radiation more and more serious. Electromagnetic wave pollution has become the fourth major source of pollution after air pollution, water pollution and noise pollution. As people's awareness of radiation hazards has deepened, the awareness of radiation protection has been increasing, and radiation protection clothing has been expanding rapidly. A large number of anti radiation clothing have emerged in the market. The quality of these products is uneven. Therefore, it is imperative to work out relevant product standards.

1. Hazards of electromagnetic radiation

Generally speaking, the electromagnetic radiation of household electrical appliances is not very harmful to ordinary people, but when the electromagnetic radiation intensity of human body exceeds a certain limit or produces cumulative effects, it will have adverse effects on human health. High intensity electromagnetic radiation can cause a series of discomfort to the human body, especially for the elderly, children, pregnant women and patients and other special populations. [1] is more harmful. In 1998, the WHO listed the five major effects of electromagnetic radiation on human body: 1) electromagnetic radiation is the main inducement of cardiovascular disease, diabetes and cancer mutation; 2) electromagnetic radiation causes damage to human reproductive system, nervous system and immune system; 3) electromagnetic radiation is the inducing factor of maternal abortion, infertility and teratopathy; 4) electromagnetic radiation directly affects children's development, bone marrow development, resulting in decreased vision, retinal detachment and liver hematopoietic function decline; 5) electromagnetic radiation can reduce sexual function, endocrine disorders and menstrual disorders in women.

2. Radiation protection clothing Development

2.1 radiation protection fabric and protection mechanism

Beginning in 60 and 70s of twentieth Century, scientists began to search for a good way to shield electromagnetic waves, and electromagnetic shielding clothing came into being [3]. At present, the most common anti electromagnetic radiation fabrics are metal wire and yarn blended fabric, metal fiber and fiber blended fabric, electroless plating fabric, metal spraying fabric, and high tech multi ion, multi-element and nano material [4].

　　 Metal fiber The shielding mechanism of electromagnetic shielding with conventional fibers is mainly based on the conductive function of metal fibers (such as silver, nickel, copper, stainless steel, etc.) or metallized fibers. These conductive metals have strong reflection and absorption effects on electromagnetic waves. When the electromagnetic wave is radiated on the fabric, the uniformly distributed metal or metallized fibers in the fabric become conductive medium and reflect some electromagnetic waves back, reducing the transmission of electromagnetic waves. At the same time, the electrons in the conductor are induced to form eddy currents under the action of electromagnetic waves. The eddy current conducts heat effect in the conductor, thereby resulting in the loss of electromagnetic waves. With the increase of conductive fiber content in the fabric, the stronger conductivity, the stronger the reflectivity, the more vortex formation, the more multiplicity reflection, and the smaller the electromagnetic wave permeability, the better the shielding effect is. [5-6] At present, the more high-end products are made of silver fiber fabrics. Because of the good conductivity of silver fiber, its shielding effectiveness is much better than other fibers. However, because of the high price and the restrictions on the use of silver by the state, the general wage earners can only enjoy a wide range of popularity. At present, the wire used in electromagnetic shielding fabric is mostly made of copper, nickel and stainless steel fibers. Among them, the preparation technology of stainless steel fiber is relatively mature, and the price is low, and its shielding effect is excellent.

Made by fabric coating technology. Radiation protection clothing After a certain period of wear and washing, the surface coating will gradually fall off, which greatly affects the radiation protection effect. Therefore, it has been eliminated by some large manufacturers. At present, the best selling radiation protection clothing is made of blended conductive fibers and conventional fibers, which is recognized as a green electromagnetic shielding product in the world. Because conductive fibers are relatively fragile, salesmen will emphasize the washing instructions when buying, that is, reduce the frequency of cleaning, and avoid rubbing and soaking in long time chemical detergent, so as not to affect shielding performance. However, after a period of time, a lot of clothes will become dirty after wearing, especially dripping oil or other substances which are not easy to clean. Only washing and soaking in short time can not solve the problem. For a long time, dirt accumulations on the surface of clothes can easily breed bacteria and microbes, which will bring risks to consumers' health.

2.2 structure design of radiation protection clothing

Because the opening and the gap of clothing will affect their efficacy to a certain extent, so Radiation protection clothing In the structural design, we should minimize the number and area of the opening, reduce the stitching between the sheets, and make the shielding effect of the radiation protection reach the best condition. Properly lengthen garment length and sleeves, tighten necklines, cuffs and hem as much as possible, and thicker garment fabrics to form a relatively closed space for radiation protection, which can withstand strong penetration of electromagnetic waves. For example, the shielding effect of the belly bag type radiation protection clothing sold on the market will be somewhat worse than that of the jacket type, because the electromagnetic wave can easily enter the [7] from the bare back.

2.3 the functional and aesthetic sense of protective clothing

We can design radiation protection clothing according to people's occupation, personal taste and body shape, subdivide the consumption market, and design different styles for different consumer groups. For those who are in urgent need of protective measures in special operations, they should wear resistance and water resistance. The fabrics are thicker, the tone is darker and stain resistant, and the pattern is mainly clothing. Protective clothing The design emphasis can be placed on the upper part of the body, pleating or lace on wide clothing, and using local embroidery techniques to attract people's attention to the decorative parts, and consider the pregnant women in all periods, especially in the later stage of pregnancy, so that they can wear out as easily as possible. The radiation protection underwear emphasizes the soft and comfortable fabric, and the women's underwear is as good as possible, reflecting the graceful figure of the female, and the children and men's underwear are relatively comfortable and comfortable. Of course, the design of radiation protection clothing should also improve clothing design and clothing comfort from the aspects of heat preservation, permeability, light weight, wear and tear, and so on, so that radiation protection clothing will be recognized by more and more people.