Neutron radiation protective clothing material and preparation method

A radiation protection and neutron technology, applied in reactors, nuclear engineering, shielding, etc., can solve the problems of low density of hydrogen atoms in rubber, low shielding efficiency, and reduced wearing comfort

Active Publication Date: 2014-09-03
中国人民解放军火箭军装备研究院第四研究所
View PDF5 Cites 10 Cited by
  • 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 f

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Neutron radiation protective clothing material and preparation method
  • Neutron radiation protective clothing material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: see attachment 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 attachment 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 com...

Embodiment 3

[0026] Embodiment 3: see attachment 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 spin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the field of a radiation protective material and especially relates to a neutron radiation protective clothing material and its preparation method. The technical scheme is as follows: the neutron radiation protective clothing material is characterized by at least comprising five layers of padding non-woven fabrics with different functions; the outermost layer (1) is padding non-woven fabric containing heavy metal; a second layer (2) is padding-free non-woven fabric; a third layer (3) is low-boron padding non-woven fabric; a fourth layer (4) is high-boron padding non-woven fabric; the innermost layer (5) is lead-containing padding non-woven fabric; and the five layers of functional padding non-woven fabrics are prepared by overlaying and sewing from the outermost layer (1) to the innermost layer (5) when in use. A preparation method of each functional layer comprises steps: (a) melt-blowing; (b) spraying; and (c) compounding. The neutron radiation protective clothing material has intermediate energy neutron, thermal neutron and X, gamma ray shielding functions, and has advantages of soft fabric, wear comfortableness and high shielding efficiency, simple production technology. Meanwhile, the preparation method has advantages of simple production technology, high production efficiency and low processing cost.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G21F1/12G21F3/02
Inventor 李瑛崔亦斌穆晓曦周百昌马文新陈雅萍郭恒陈燕杨初李经吴春张慧秋杨培英严湘军
Owner 中国人民解放军火箭军装备研究院第四研究所
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap