Low energy radiation protection organic glass for medical X ray machinery room door and window

Abstract

The invention relates to low-energy radiation protection organic glass for door windows of a medical X-ray machine room. The organic glass is prepared through the following steps: adding methyl metharcrylate, a cross-linking agent, an initiator, a plasticizer, a cosolvent and organic metal salts into a reactor, carrying out pre-polymerization at a temperature of between 50 and 100 DEG C, injecting slurry into a mould formed by two pieces of clean silicate glass and backbone strips made of polyvinyl chloride for carrying out copolymerization reaction for 5 to 24 hours at a temperature of between 50 and 120 DEG C till the slurry is hardened, reducing the temperature to between 25 and 50 DEG C slowly, and taking out a radiation protection organic glass plate obtained by sinking mound. According to the invention, a plurality of metal salts which are introduced into the organic glass comprise organic metal salts such as zinc, antimony, barium, and the like except an organic lead salt and can absorb rays in different wavelength ranges. The organic glass can effectively absorb low-energy radiation below 100 KeV. The organic glass has the advantages of high visual light transmission rate,low manufacturing cost, good mechanical properties, and lower scattering intensity, and is suitable for the door windows of the medical X-ray machine room.

Description

Low-energy radiation-protective plexiglass for doors and windows in medical X-ray rooms technical field The invention relates to a protective organic glass which can effectively absorb low-energy radiation below 100KeV and reduce scattering, and can be used for doors and windows of X-ray machine rooms for medical diagnosis and treatment. Background technique As we all know, the ray energy produced by medical X-ray machines is below 100KeV, which is low-energy radiation. The protection requirements for doors and windows in the computer room are ① lead equivalent of 0.5mmPb, ② good transparency, visible light transmittance ≧ 80%, ③ high strength, easy processing convenient. At present, there are mainly two kinds of transparent protective materials used to block ionizing radiation: one is inorganic lead glass, which has good transparency and protective performance, but is brittle and fragile, high energy consumption, high price, high density, heavy and It is impossible to m...

AI Technical Summary

Problems solved by technology

At present, there are mainly two kinds of transparent protective materials used to block ionizing radiation: one is inorganic lead glass, which has good transparency and protective performance, but is brittle and fragile, high energy consumption, high price, high density, heavy and It is impossible to produce large-area materials, and it is not convenient for cutting and processing

The other is leaded plexiglass. Low-temperature synthesized plexiglass is more and more popular because of its advantages of energy saving and environmental protection, small specific gravity, and convenient secondary processing. However, plexiglass that can meet the requirements of transparency and strength The lead equivalent is low, which cannot meet the protection requirements; the high lead equivalent plexiglass that can meet the protection requirements has low strength, poor hardness, and is easy to scratch, and the heavy metal lead produces strong scattering

Therefore, the existing transparent protective materials are difficult to meet the requirements for the use of doors and windows in medical X-ray machine rooms