Material improvement and innovative development of radiation protective clothing
The advantage of radiation protection material protection is that the intensity of radiation includes penetrating substances will be weakened, shielding substances with a certain thickness can weaken the intensity of radiation, and a shield with enough thickness is set between radiation source and human body, the radiation level can be reduced, and the dose people receive at work can be reduced to below the high allowable dose to ensure personal safety and achieve the purpose of protection.
X-ray protective clothing the commonly used material is lead-containing cloth, which can effectively reduce the harm of X-ray to human body and has been widely used in life. Let's introduce the technical requirements of X-ray protective clothing:
1. Shielding efficiency: the shielding efficiency of Class A and Class C materials is not less than 40dB, and the shielding efficiency of Class B materials is not less than 30dB.
2. Resistance: the resistance of the new X-ray protective clothing fabric should not be greater than 800m.
3. Fabric fusing current: the fusing current of Class A clothing is not less than 5A, and the fusing current of Class B and Class C clothing is not less than 30A.
4. Electric spark: After 2 minutes of electric spark resistance test, the damage area of fabric carbonization shall not be more than 300mm.
The new anti-X-ray fiber is made of polypropylene and solid X-ray shielding agent. The linear density of the finished fiber is over 2.2 mountain e, and the breaking strength of the fiber can reach about 20-3ocN Force e, and the breaking elongation is about 25-5, the X-ray shielding rate of non-manufactured cloth with a certain thickness made of anti-X-ray fiber decreases with the increase of tube pressure on the X-ray instrument; however, its shielding rate increases to a certain extent with the increase of the square meter weight of nonwoven fabric. Non-woven fabric made of anti-X-ray fiber based on polypropylene has good shielding effect on medium and low energy X-ray. When the fixed weight of nonwoven fabric used for protective clothing is above 6009/M2, the shielding rate of medium and low energy X-ray can reach above 70. The shielding rate of the protective clothing can be improved by adjusting the thickness of the fabric or increasing its layers.
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