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Neutron irradiation protective clothing material and preparation method for same

A radiation protection and neutron technology, used in reactors, nuclear engineering, shielding, etc., can solve the problems of low density of rubber hydrogen atoms, inability to achieve effective neutron field protection, and neutron moderation.

Inactive Publication Date: 2015-12-16
ANHUI GUIGU E COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low density of hydrogen atoms in rubber is unfavorable to the moderation of neutrons, and rubber-like substances are prone to bonding, and the softness is poor, which reduces the wearing comfort
Fiber fabrics containing boron and lithium elements are soft and have good wearing performance when used as protective clothing. Poor degree, low shielding efficiency
The composite fiber made by melt spinning has low shielding efficiency because the content of radiation shielding substance in the core layer cannot exceed 60% (w%)
[0004] Therefore, the existing neutron radiation protective clothing materials cannot effectively protect the neutron field, and the safety, softness and comfort cannot meet the requirements of neutron radiation protective clothing.

Method used

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  • Neutron irradiation protective clothing material and preparation method for same
  • Neutron irradiation protective clothing material and preparation method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: see attached figure 1 , a neutron radiation protective clothing material, characterized in that it includes at least five layers of non-woven fabrics with different functional fillers, the outermost layer 1 is a non-woven fabric containing heavy metal fillers, which is used to rapidly reduce the neutron energy to inelastic scattering Threshold, while shielding X, gamma rays; the second layer 2 is non-woven fabric without fillers, used to further moderate neutrons; the third layer 3 is non-woven fabrics with low boron-containing fillers, used to reduce neutron energy, Simultaneously absorb thermal neutrons; the fourth layer 4 is a high boron-containing filler non-woven fabric for further absorbing thermal neutrons; the innermost layer 5 is a lead-containing filler non-woven fabric for shielding gamma rays;

Embodiment 2

[0022] Embodiment 2: see attached figure 1 , The neutron radiation protection clothing material as described in Example 1 is characterized in that the composition and mass ratio of the outermost layer 1 non-woven fabric containing heavy metal fillers are: 60% to 85% of heavy metal compounds, 1% of adhesive ~ 3%, antioxidant 0.3% ~ 0.7%, filament-forming polymer 11.3% ~ 38.7%; the composition and mass ratio of the second layer 2 non-woven fabric without fillers are: antioxidant 0.3% ~ 0.7%, composition Silk polymer 99.3% to 99.7%; the composition and mass ratio of the third layer 3 low boron-containing filler non-woven fabric are: boron compound 5% to 30%, adhesive 1% to 3%, antioxidant 0.3% to 0.7%, filament-forming polymer 66.3%-93.7%; the composition and mass ratio of the fourth layer 4 high boron-containing filler non-woven fabric are: boron compound 50%-70%, adhesive 1%-3%, anti-oxidation 0.3% to 0.7% of the agent, 26.3% to 48.7% of the filament-forming polymer; the compo...

Embodiment 3

[0026] Embodiment 3: see attached figure 2 , the preparation method of each functional layer of neutron radiation protection clothing material as described in embodiment 1 or 2, its production process is:

[0027] (a) Melt-blown: After the filament-forming polymer chips and antioxidant are mixed evenly, they are fed into the screw extruder to be heated and melted, and extruded from melt-blown spinneret A and melt-blown spinneret B through melt-blown spinning to form Fiber web;

[0028] (b) Spraying: Stir the functional filler and adhesive in the stirring tank for 20 to 30 minutes to mix evenly, add it to the barrel of the spraying device, spray it from the spraying head through the spraying process, and adjust the functional filler by adjusting the reciprocating speed of the spraying gun content;

[0029] (c) Composite: The fiber web ejected from the melt-blown spinneret A, the functional filler sprayed by the spray head, and the fiber web ejected from the melt-blown spinne...

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Abstract

The invention belongs to the field of irradiation protective material and in particular relates to a neutron irradiation protective clothing material and a preparation method for the same. The technical scheme is that the neutron irradiation protective clothing material is characterized by at least comprising five layers of filler non-woven fabric with various functions; the outmost layer (1) is a non-woven fabric containing heavy metal; the second layer (2) is a non-woven fabric without fillers; the third layer (3) is a filler non-woven fabric with boron; the fourth layer (4) is a filler non-woven fabric with high boron content; and the innermost layer (5) is a filler non-woven fabric with lead. During the use, the five layers are orderly overlapped and sewed together. Each functional layer is prepared according to the following steps of (a) melt-blowing, (b) spraying and (c) composing. The neutron irradiation protective clothing material has shielding functions for intermediate energy neutrons, thermal neutrons, X and Gamma rays; the fabric is soft, comfortable to wear and has high shielding efficiency; and the production technology is simple, production efficiency is high and production cost is low.

Description

technical field [0001] The invention belongs to the field of radiation protection materials, in particular to a clothing material and a preparation method thereof. Background technique [0002] Existing neutron radiation protective clothing is designed for thermal neutron shielding, the shielding efficiency for neutral energy neutrons is very low, and there is no shielding for X, γ-rays and secondary generated γ-rays in the mixed field. In practical applications, the radiation field is usually a mixed field, and the energy spectrum of neutron radiation is widely distributed, and the average energy is above 0.2 MeV. For example, in a research heavy water reactor plant, the neutron field energy is between 11keV and 201keV, and the average dose equivalent shares of thermal neutrons, medium energy neutrons and fast neutrons are 20.6%, 21.0% and 58.4% respectively, and neutron After interacting with neutron-absorbing materials, it produces secondary gamma-ray radiation with high...

Claims

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Application Information

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IPC IPC(8): G21F1/12G21F1/10
Inventor 不公告发明人
Owner ANHUI GUIGU E COMMERCE
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