Neutron shielding material for rotational molding and rotationally molded products with neutron shielding effect

Abstract

The present invention relates to a neutron shielding material for rotomolding and a rotomolded product with a neutron shielding effect. The neutron shielding material for rotomolding of the present invention includes material A and material B, wherein material A includes the following parts by weight Components: 100 parts of polypropylene, 0.2-1 part of the first antioxidant, 0.1-0.5 parts of the first lubricant, 10-25 parts of heavy metal compounds, 10-30 parts of boron-containing fiber; material B includes: 100 parts of polypropylene 0.2-1 part of the second antioxidant, 0.1-0.5 part of the second lubricant, 5-20 parts of the compound containing boron element; the compound containing boron element is a non-fibrous material. The neutron shielding material for rotomolding of the present invention has simple preparation process, good heat resistance, and high radiation shielding efficiency, and the formed rotomoulding product structure with neutron shielding effect can be designed to meet the radiation shielding requirements of different facilities It can effectively reduce the impact of neutrons on personnel and the environment.

Description

technical field [0001] The invention relates to the technical field of neutron shielding, in particular to a neutron shielding material for rotational molding and a rotational molding product with neutron shielding effect. Background technique [0002] Rotational molding, also known as rotary molding or rotary molding, is to add a certain amount of plastic powder with a pre-proportioned ratio into the mold, and the mold moves with the rotating arm of the machine in space and is heated. It gradually melts under the action of the mold and sticks to the molding surface of the mold, and then after cooling, it is demolded to obtain the product. The rotational molding process can form hollow plastic products with large surface area, uniform thickness, and smooth inner and outer surfaces, such as large storage tanks, containers, and yachts. [0003] With the rapid development of nuclear energy, radiation processing, non-destructive testing, radiation medicine and other industries,...

AI Technical Summary

Problems solved by technology

Although boron-based or lead-based polyethylene composite shielding materials have the comprehensive effect of shielding neutrons and rays, due to poor heat resistance and low strength, they are not suitable for use in working environments with temperature requirements, resulting in extremely short service life. Frequent replacement

Traditional neutron shielding materials are prepared by directly blending polymers with fillers such as lead and boron. The shielding efficiency of the obtained neutron shielding materials is low, and a higher amount of fillers and a larger thickness are required to achieve a better effect. Shielding efficiency

[0005] In addition, the equipment in the nuclear experiment and application process has different shapes and complex structures

At present, the commonly used neutron shielding materials are mostly plate or sheet structures, which are difficult to process into large-sized and complex-shaped shielding protection devices, so they are subject to more restrictions in practical applications, and the use effect is not ideal.

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