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X-ray and gamma-ray shielding non-woven fabric and preparation method thereof

A technology of non-woven fabrics and γ-rays, which is applied in the manufacture of rayon, textiles and paper, and non-woven fabrics. It can solve the problems of reducing the softness and comfort of clothing, weak particle absorption capacity of lead, and limited addition of shielding materials. , to achieve the effects of no skin contact toxicity, low processing cost and high production efficiency

Active Publication Date: 2012-07-11
HUBEI HUAQIANG HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the existing X and γ-ray protective clothing materials are made of lead-containing materials. Lead shielding materials have good particle absorption capabilities for rays with energy higher than 88Kev and between 13 and 40Kev, but for energy between 40Kev and 40Kev. The rays between 88Kev have a region with very weak particle absorption ability (weak absorption region of lead)
At the same time, lead-containing material products as shielding materials will undoubtedly reduce the softness and comfort of clothing
In addition, lead has skin contact toxicity, and the waste will cause great pollution to the environment.
Knitted fabrics, woven fabrics and non-woven fabrics prepared by wet spinning and melt spinning mixed with shielding materials can significantly improve the softness and comfort of clothing. Due to the limitation of the spinning process, there is an amount of shielding materials added. Limited, low shielding efficiency issues

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
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  • X-ray and gamma-ray shielding non-woven fabric and preparation method thereof
  • X-ray and gamma-ray shielding non-woven fabric and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Dry polypropylene slices with a melt index of 75 until the water content is below 0.01%, then add 0.2% (wt) phenyl-α-naphthylamine antioxidant, and stir in a closed high-speed mixer at 600 rpm Mix for 10 minutes, then stir and mix for 10 minutes at a speed of 1500 rpm. The mixed material is fed into a screw extruder and extruded into the first metering pump and the second metering pump at a temperature of 340 ° C. The pump supply is 0.7 g / min is accurately metered into the melt distribution cavity, and then enters the spinning melt pool after rectification, and then is ejected from the first spinneret 1 and the second spinneret 2 at a die temperature of 350°C. The filaments were stretched under the jet stretching of a high-speed airflow at a speed of 25.7m / s and a temperature of 330°C to form fibers. The drawn fibers are formed on the collecting device under the guidance of the suction wind.

[0039] Stir functional fillers with an average particle size of about 10 μm ...

Embodiment 2

[0042] Dry the polypropylene chips with a melt index of 75 to less than 0.01% water, then add 0.2% (wt) 4,4-methylene-bis-(2,6 di-tert-butyl)phenol antioxidant, Stir and mix in a high-speed mixer at 600 rpm for 10 minutes, then stir and mix at 1500 rpm for 10 minutes, and the mixed material is added to a screw extruder and extruded at a temperature of 340°C into the first The metering pump and the metering pump are accurately metered into the melt distribution chamber with a pump supply rate of 0.7 g / min, and then enter the spinning melt pool after rectification, and then flow from the first spinneret at a die temperature of 350 ° C 1 and the second spinneret 2 are sprayed into filaments, and are formed into fibers under the jet stretching of a high-speed airflow with a speed of 25.7m / s and a temperature of 330°C. The drawn fibers are formed on the collecting device under the guidance of the suction wind.

[0043] Stir functional fillers with an average particle size of about...

Embodiment 3

[0046]Dry the polypropylene slices with a melt flow rate of 1200g / 10min until the water content is below 0.01%, then add 0.2% (wt) of phenyl-β-naphthylamine antioxidant, in a closed high-speed mixer at 600 rpm Stir and mix for 10 minutes at a sub-rotation speed, then stir and mix for 10 minutes at a speed of 1500 rpm. The mixed material is added to a screw extruder and extruded into the first metering pump and the second metering pump at a temperature of 270 ° C. The pump supply rate is 0.7 g / min and is accurately metered into the melt distribution cavity, and then enters the spinning melt pool after rectification, and then flows from the first spinneret 1 and the second spinneret at a die temperature of 240°C. 2. Spray into filaments, and form fibers under the jet stretching of a high-speed airflow with a speed of 70m / s and a temperature of 255°C. The drawn fibers are formed on the collecting device under the guidance of the suction wind.

[0047] Stir functional fillers wit...

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
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Abstract

The invention discloses an X-ray and gamma-ray shielding non-woven fabric and a preparation method thereof. The X-ray and gamma-ray shielding non-woven fabric is formed by uniformly doping tantalum, tungsten and strontium or a compound thereof in a polypropylene non-woven fabric. The metals or compounds in the non-woven fabric account for 60wt%-70wt% of the non-woven fabric; and tantalum accounts for 30%-40% of the metals, tungsten accounts for 40%-50% of the metals and strontium accounts for 10%-30% of the metals. The preparation method of the X-ray and gamma-ray shielding non-woven fabric adopts a melt blowing and spraying composite technology; and the X-ray and gamma-ray shielding non-woven fabric provided by the invention has the characteristics of no skin contact toxicity, no shielding weak-absorption zone and high shielding efficiency.

Description

technical field [0001] The invention relates to the technical field of radiation-shielding nonwoven fabrics, in particular to an X and gamma-ray shielding nonwoven fabric and a manufacturing method thereof. Background technique [0002] Most of the existing X and γ-ray protective clothing materials are made of lead-containing materials. Lead shielding materials have good particle absorption capabilities for rays with energy higher than 88Kev and between 13 and 40Kev, but for energy between 40Kev and 40Kev. The rays between 88Kev have a region with very weak particle absorption ability (the weak absorption region of lead). At the same time, lead-containing material products undoubtedly reduce the softness and comfort of clothing as shielding materials. In addition, lead has skin contact toxicity, and wastes cause great pollution to the environment. Knitted fabrics, woven fabrics and non-woven fabrics prepared by wet spinning and melt spinning mixed with shielding materials ...

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
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/007D04H3/02D01F6/46D01F1/10
Inventor 段朝阳贺华山陈洁唐俊雄
Owner HUBEI HUAQIANG HIGH TECH CO LTD
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