KR20110133225A

KR20110133225A - Radioactive ray shield sheet with flexibility and restoration, cloth made thereby and manufacturing method thereof

Info

Publication number: KR20110133225A
Application number: KR1020100052837A
Authority: KR
Inventors: 강우석
Original assignee: 강우석
Priority date: 2010-06-04
Filing date: 2010-06-04
Publication date: 2011-12-12
Also published as: KR101192915B1

Abstract

The present invention relates to a radiation shielding sheet having flexibility and resilience, a radiation shielding suit made from the same, and a manufacturing method thereof, the radiation shielding sheet according to the present invention comprising: powdered lead; It is prepared in a flexible and resilient sheet shape prepared by adding a composite to the powdered lead.
Accordingly, it is possible to provide a radiation shielding sheet which is more flexible and has a good bending and resilience, is easy to use, and has improved safety.

Description

Radiation shielding sheet with flexibility and resiliency, garments made from the same and manufacturing method thereof {Radioactive Ray Shield Sheet with Flexibility and Restoration, Cloth made thus and Manufacturing Method}

The present invention relates to a radiation shielding sheet having flexibility and resilience, to a garment made thereof, and to a method of manufacturing the same, and more particularly to a radiation shielding sheet having a flexibility and resilience to a sheet shape that shields gamma radiation and has flexibility and resilience. It relates to a manufacturing method.

Elements with very high atomic weights, such as uranium and plutonium, are so unstable that their cores are so heavy that they collapse. When these elements collapse and change into other elements, they emit some particles or electromagnetic waves, which are radiation. The elements that give out radiation are called radioactive elements, and their ability to give out radiation is called radioactivity. When these elements decay, there are three radiations: alpha (alpha) rays, beta (beta) rays, and gamma (gamma) rays. However, in general, when referring to diagonal lines, not only these three but also other particles or electromagnetic waves such as X-rays and neutron beams are often mentioned in combination. Radiation can be broadly classified into two types: alpha (alpha) rays, beta (beta) rays, and particle rays, which are particles that move like neutron rays, and electromagnetic waves such as X rays and γ (gamma) rays. Hereinafter, the representative γ (gamma) rays and neutron rays of the two will be described.

γ (gamma) rays are electromagnetic waves with very short wavelengths, that is, light. Most electromagnetic waves with wavelengths less than 10 pm (10-9 m) are called gamma rays. The properties of the X-rays and the wavelength region overlap with each other. Similarly, X-rays and gamma rays are not distinguished by the wavelength length, but by what causes them. Gamma rays refer to electromagnetic waves that emit energy generated when the nucleus of one element collapses and changes to another. X-rays refer to electromagnetic waves emitted by electrons in atoms other than the nucleus. When the nucleus inside the atom collapses, releasing alpha or beta rays, a very small amount of mass is lost, which is converted into large energy according to Einstein's equation E = mc2. This energy destabilizes the nucleus, which in turn returns to a stable state, giving off a large amount of electromagnetic waves.

The higher the energy, the shorter the wavelength, so gamma rays are emitted when the nucleus collapses. Gamma rays do not have ionization capabilities in themselves, but because of their high energy, they give energy by touching atoms or molecules in matter, causing ionization. This is manifested in phenomena such as the photoelectric effect and the Compton effect. It also dies, producing electrons and positrons (pairing). Conversely, when the electrons and positrons meet, gamma rays appear (double extinction). The ionization capacity itself is weaker than alpha or beta rays, but the penetration is so strong that the general radiation exposure is due to gamma rays. It can be blocked through dense materials such as concrete, iron, and lead, but even the best shielding lead requires a thickness of about 10 cm.

Particle beams include neutron beams, proton beams, and cosmic rays. Electromagnetic waves, such as ultraviolet (UV) ultra violet, also cause ionization, but generally do not put ultraviolet light into radiation. X-rays are electromagnetic waves with a wavelength of 10-9m to 10-5m, and are generally longer and weaker than gamma rays. Proton and neutron beams do not occur when the nucleus collapses, but by artificial means such as nuclear reactors or particle accelerators. Protons have properties similar to alpha rays, and neutrons do not have charges, but because of their high kinetic energy, they produce gamma rays or emit protons, causing ionization. Cosmic rays refer to all radiations originating in the universe other than the Earth's origin, such as nuclear nuclei or nuclear reactors, and include muons, neutrinos, electrons, neutrons, and gamma rays.

Such radiation can occur in nuclear power plants, laboratories, hospitals, etc., which mainly deal with radiation in real life. Thus, a radiation shielding sheet made of a shielding material that can safely shield radiation contamination of workers working under the conditions in which radiation occurs is used. However, such a shielding sheet is inconvenient for the user to use because it is not restored to its original state after being bent or bent. In addition, lead, which is a material capable of shielding radiation, is usually manufactured in an ingot form, thereby making it possible to create a plurality of ingots, thereby deteriorating stability due to a seam that connects each ingot and a hole for forming a seam. .

Accordingly, it is an object of the present invention to provide a radiation shielding sheet, a garment made thereof, and a method of manufacturing the same, which are more flexible and have excellent resilience.

In addition, another object of the present invention is to provide a radiation shielding sheet, a garment made thereof, and a method of manufacturing the same having improved safety and flexibility.

In addition, another object of the present invention is to provide a radiation shielding sheet, a garment made thereof, and a method of manufacturing the same, which have flexibility and resilience to prevent lead toxicity from occurring due to no breakage or dropping of lead powder.

Further, another object of the present invention is to provide a radiation shielding sheet, a garment made thereof, and a method of manufacturing the same, having flexibility and resilience that can relatively improve the application range.

Further, another object of the present invention is to provide a radiation shielding sheet, a garment made thereof, and a method of manufacturing the same, which have a flexibility and a resilience that can be easily detached.

The object is a powdered lead; It is achieved by a flexible radioactive shielding sheet having a flexible and resilient sheet shape prepared by adding a composite to the powdered lead.

In addition, it is preferable that the composite contains an isocyanate ester polymer compound.

In addition, the content of the powdered lead is 95wt% or more, and the composite preferably further comprises an additive capable of forming at high density and high pressure by combining the powdered lead and the polymer compound.

On the other hand, the object of the present invention is also achieved by a flexible and resilient radiation shielding garment made of a radiation shielding sheet.

On the other hand, an object of the present invention is to mix the powdered lead and the composite; It is also achieved by a method of manufacturing a flexible radiation shielding sheet comprising a; forming a high-density sheet by molding at a high pressure.

In addition, the composite includes an isocyanate ester polymer compound, and the content of the powdered lead is preferably 95 wt% or more.

According to the present invention, it is more flexible and excellent in resilience, and may have a good wearing feeling when manufactured in clothing or the like.

In addition, a seam, a hole, or the like is not required, and thus safety may be improved.

In addition, it is possible to prevent lead toxicity from breaking or falling of the lead powder, thereby improving safety.

In addition, it can be produced by adjusting the content, strength, thickness, etc. of the shielding material in response to the radiation dose, and can be used in a variety of applications, such as clothes, curtains, protective film, etc. can improve the scope of application.

In addition, it is open to the front and can be easily detached as in general work clothes, so it is convenient to use.

1 (a) to 1 (d) is a schematic diagram for explaining a process for making a material of the radiation shielding sheet according to an embodiment of the present invention,
Figure 1 (e) is a cross-sectional view cut the material of the radiation shielding sheet according to the present invention,
Figure 1 (f) is a view showing the shape of the radiation shielding suit made using a radiation shielding sheet according to the present invention,
Figure 2 is a view showing a process of the radiation shielding sheet according to the present invention.

Hereinafter, the present invention will be described in detail with reference to FIGS. 1 (a) to 2.

In particular, the radiation shielding sheet 100 according to the present invention mainly has a function of shielding gamma rays or X-rays having a straightness among the above-described types of radiation.

In the mixing step (S310), as shown in FIGS. 1A and 2, the powdered lead and the subsidiary material, which are main materials, are mixed with the mixer 110 to generate a mixed material. In this case, the mixing means may use various kinds of mixing means 110 including a mixer and the like. However, since lead is used in a powder state, a mixing means of a sealed structure is preferable to prevent harmful dust from scattering. Here, the content of the powdered lead is preferably 95 wt% or more. If it is lower than this ratio, the ability to shield radiation is poor. However, the present invention does not exclude the content of powdered lead of more than 80 wt% but less than 95 wt%. Hereinafter, the shielding rate that can shield the gamma ray, among the radiation, depends on the mixing ratio of the powdered lead, the thickness of the plate-shaped material 140 according to the present invention. That is, the shielding ratio of the powder lead ratio of 80wt% and 95wt% in the material 140 having the same thickness is different, and in the case of having the same powder lead ratio, the thicker the thickness, the higher the shielding ratio of gamma radiation. Lead is a material capable of shielding gamma rays having straightness. In the present invention, the application of such lead in powder form is one feature. The powder lead used is preferably a high purity powder lead having excellent radiation shielding rate.

Materials added to the powdered lead include isocyanate ester polymers. And the additive which can combine these mutually tightly is added. Thus, in the radiation shielding sheet 100 according to the present invention, not only the binding force of the lead particles of the powder is very strong, but also high density can be achieved. Many experiments have shown that isocyanate ester high molecular weight compounds can achieve higher binding strength and higher density of powders. That is, as in most cases, the physical properties of the finally prepared radiation shielding sheet 100 may be different depending on the type of compound to be added.

Molding step (S320), as shown in Figure 1 (b), Figure 1 (c) and Figure 2, for example, consists of a press operation having a mold of the lower mold 125 and the lower mold (123). For example, the raw material 130 mixed in the lower mold 125 provided in the lower portion of the press 120 is placed, and the lower mold 123 provided in the upper portion of the press 120 is lowered to mix the raw materials of the lower mold 125 ( 130) is pressurized. In this case, the temperature of the raw material 130 to the material 140 is maintained between 45 ± 5 ° C., for example. If it is lower or higher than this temperature, molding is somewhat difficult when pressurized. In order to maintain such a temperature, the lower mold 123 or the lower mold 125 may include a heater (not shown).

Then, in the aging (curing) step (S330), as shown in Fig. 1 (c) and 2, by maintaining a pressurized state for a predetermined time at a constant temperature to mature the mixed material 140. That is, it may be different depending on the desired thickness, for example, when the product thickness is 2mm, for example, the aging process in order to maintain the stability of the product by maintaining the temperature range of 20 ± 5 ℃ for about 10 ± 1 hour. Aging longer than this time does not improve the effect on aging, and if it is aged shorter than this time, the powder lead and the composite are not firmly bonded to each other. There is a high possibility of causing a phenomenon. In addition, when the time of this step elapses, the material 140 is hardened. In other words, powdered lead, a high molecular compound, additives, etc. are a process required to stabilize by causing a mutual chemical reaction. The material 140 that has undergone this step becomes a denser plate-shaped material 140.

The formed material 140 is much more flexible and resilient than conventional radiation shielding materials.

According to various embodiments of the present disclosure, different times and temperatures may be applied when the content of powdered lead, the thickness of the product, and the like are different.

Finishing step (S340), as shown in Figure 1 (d) to 2, the process of finishing the material 140 separated from the lower mold 123 and the lower mold 125, the step of attaching the outer shell or the endothelium , Sewing to fit the shape of the garment, including the step of making the garment form.

First, as shown in FIG. 1D, the upper mold 125 is separated from the lower mold 123, and the material 140 is separated from the lower mold 123. And although not shown in figure, the finishing operation which cleanly finishes the edge of the plate-shaped raw material 140 etc. isolate | separated from the lower mold | type 123 and the lower mold | type 125 is performed cleanly.

Next, as shown in Figure 1 (e), the inner or outer side of the material 140, as necessary, the endothelial 160 or the outer shell 150 is attached to the material 140 using a binder. In this process, it is preferable to use an isocyanate-based polymer compound constituting the component of the material 140 as a binding material for bonding the material 140 and the endothelial 160 or the outer shell 150. Therefore, the component constituting the material 140 can also be used as a binder can improve the adhesion even more.

Next, as shown in Figure 1 (f), the user is cut into a shape of a vest easy to wear, to make a radiation shielding suit 100 of the required shape. On the other hand, since the plate-shaped material 140 is used to open the front so that there are no seams, holes, etc., it is preferable to fix the velcro tape by the coupling means 170. Therefore, the part which is not shielded can be eliminated through a conventional seam or a hole, and a radiation can be shielded more efficiently.

That is, in one embodiment, after wearing a radiation shielding suit 100 made of a radiation shielding sheet 140 according to the present invention in the form of an open front like a conventional vest, it is very convenient to use the Velcro tape 170. And it is provided in the form of a single plate that does not require a seam or a hole can improve the safety.

Although the above-described embodiment has been described only with respect to clothing, the radiation shielding clothing 100 according to the present invention is very effective even when used as a shielding curtain, a barrier of a radiation room in which radiation is generated as well as clothing. That is, even when used in a structure such as a wall it can shield the radiation very effectively.

Here, although various embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art that the present embodiments may be modified without departing from the spirit or spirit of the present invention. will be. It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents.

100: radiation shielding suit 110: mixer
120: Press 123: Pictograph
125: lower mold 130: mixed material, raw material
140: material, radiation shielding sheet 150: shell
160: endothelial 170: coupling means

Claims

Powdered lead;
A radioactive shielding sheet having a flexible and resilient sheet shape prepared by adding a composite to the powdered lead and mixing.

The method of claim 1,
The composite is a radiation shielding sheet comprising an isocyanate-based ester polymer compound.

The method of claim 2,
The content of the powdered lead is 95wt% or more,
The composite is a radiation shielding sheet characterized in that it further comprises an additive capable of forming a high density, high pressure by combining the powdered lead and the polymer compound.

A flexible and resilient radiation shielding clothing comprising the radiation shielding sheet of claim 1.

Mixing the powdered lead with the composite;
Forming at high pressure to form a high-density sheet shape; and a method of manufacturing a radiation shielding sheet and radiation shielding clothing comprising a.

The method of claim 5,
The composite includes an isocyanate-based ester polymer compound,
The content of the powder lead is 95wt% or more, characterized in that the manufacturing method of the radiation shielding sheet and radiation shielding suit.