Knowledge Release: How To Identify The Radiation Protection Effect Of Maternity Dress

　　 Radiation protection during pregnancy Every expectant mother is concerned about the problem. Radiation proof maternity dress has become the necessary equipment for expectant mothers. How do you identify the radiation protection effect of maternity dress? Is it right to test the shielding effect of anti radiation clothing with the method of mobile phone?

Does radiation protection maternity dress really protect against radiation?

Most consumers use cell phones to test radiation protection. clothing The radiation protection effect of each manufacturer is not guaranteed by the introduction of radiation knowledge in its own website. Why does this happen?

from Consumer From the point of view, mobile phone testing is the most intuitive and the lowest cost test method, and the radiation protection products in the market can really encase the cell phone in most cases. The power of word-of-mouth makes most people believe that the product of the mobile phone signal is better than the package, but this is actually a misunderstanding. Many people think that since the electromagnetic shielding clothing is used to shield electromagnetic waves, it can shield the mobile phone signals, and the effect is poor. This view is not entirely correct.

Whether there is a signal to hold a cell phone and the location of the mobile phone, the frequency of the mobile phone in the network and the sensitivity of the cell phone itself are all very much related. Far from the cell phone base station and the frequency of mobile phone interference (CDMA interference level is less than GSM), the sensitivity of the mobile phone itself is low, the probability of encore the cell phone without signal is relatively large, otherwise the probability is small. In particular, the last point, the sensitivity of mobile phones, in theory, can be highly sensitive to mobile phones. With the development of technology, it can even be infinitely high. So long as a bit of signals can be received, new high-end mobile phones emerge in an endless stream, so no radiation protection manufacturer can guarantee that their products can be packaged without any signal in any case.

Secondly, the signals of mobile phones are good or bad, and as far as we know, the reason why mobile phones can be located everywhere is that the signal is installed on some tall buildings, so we can use mobile phones to call wherever they are. That is to say, near the mobile phone signal converter, the mobile phone signal is strong, and the signal is not good enough to move away from the mobile phone signal converter.

Therefore, it is erroneous and unscientific to distinguish whether the shielding effectiveness of radiation protection is strong by using mobile phones to test whether or not to pass. Especially in some large shopping malls and OFFICE buildings, because of the structure of the buildings, all the mobile phone signals in them are very poor, so the mobile phone signal intensifier is installed on the top of the building, so in these large shopping malls, the test can not reflect whether there is really shielding effectiveness.

Consumers blindly pursue the anti radiation products with no signal from the mobile phones, and reverse some bad manufacturers. Some harmful elements are used to improve the shielding effect of mobile phone signals. At present, some of the businessmen know that some of them are made of clothes with coarse metal fibers with high chromium content. This radiation proof maternity dress can completely block the mobile phone signals. However, this radiation proof maternity dress can reduce the effect of other commonly used radiated electrical appliances such as computers, televisions, and so on. Besides, there are also irregular weaving of metal fibers in textile technology. Irregular metal fibers will generate new electromagnetic waves when interfering with electromagnetic waves, thus interfering with the original electromagnetic waves, thus temporarily raising the degree of interference with the frequency of mobile phones, making it easier for mobile phones to receive signals, and actually more mobile phone signals are transformed into other cluttered radiations. Some manufacturers will design special products for the design of radiation protection products, such as adding metal to fiber. Moreover, irregular weaving can easily relax the radiation resistant fabric and is not conducive to long-term radiation protection.

In addition, the electromagnetic wave has two kinds of radiation at the same time, which are near field and far field. It is mainly distinguished by the wavelength radius of electromagnetic wave, and the near field radiation is the most harmful to the human body. Take mobile phone as an example, the mobile phone itself sends out electromagnetic waves, and the mobile phone signal base station also emits electromagnetic waves at the same time, but the human body is basically "zero distance contact" with the cell phone, and receives the near field radiation, which is the most harmful. The distance between the human body and the mobile phone base station is generally over 20 meters, and the reception is only far field radiation. The radiation intensity accords with the national standard and basically does little harm to the human body. Shielding cell phone signals is shielding the far-field radiation emitted by mobile base stations.

Radiation protection clothing can effectively shield the near-field radiation, and also has a good shielding effect on far-field radiation. In some places, mobile phones can still be connected for several reasons:

1, mobile phones have the function of actively searching for signals, and different mobile phones have different abilities. In the same place, different cell phone tests may have different results.

2, the base station of your mobile phone is very close to where you are testing. The power density of the transmitting base station is very large, so there is still a faint signal being searched by mobile phone.

3, the power of base stations is different at different time periods.

4, some brands of mobile phones have large radiation and strong reception signals, and they may also search for signals under shielding. Therefore, some mobile phone manufacturers and communication companies emphasize low radiation, safety and environmental protection instead of pursuing the powerful receiving and transmitting function of mobile phones.

5, it is possible that there is a wrong way of experiment. There will be signal leakage in the small gap. When the bag is wrapped, it should be wrapped around the cell phone and wait for a while.

6, it is related to the direction of the mobile phone antenna and the base station when testing, and the probability of the antenna back to the base station is large.

7. If you are testing in the room, it is related to your location, and it will be more likely to wrap around the load-bearing wall, because the load-bearing wall is a reinforced concrete structure, which can play a certain role in shielding the external signals.

8, the signal indication on the mobile phone panel is actually controlled by software. The number of different cell phone signals represents different meanings, and the difference between the signal indication and the actual signal intensity of some mobile phones is relatively large.

Therefore, the complete or partial screening of mobile phone signals is a simple way to detect the effectiveness of the product, rather than whether the product is qualified. Because the mobile phone is a search signal, there are many interference factors. Only at the same time, the same location, the same direction, the same mobile phone, wrapped in the same time to get the test results are comparable. Shielding efficiency is less than 100% (100% fully shielded products are unable to make clothes), there is still a signal leakage, the phone may be connected.