KR101265428B1 - Tungsten Sheet with Flexibility and Restoration using tungsten powder, Cloth made thereby and Manufacturing Method thereof - Google Patents

Abstract

The present invention relates to a tungsten sheet having flexibility and resilience, to a garment made of the same, and to a method of manufacturing the same. The tungsten powder is characterized in that the mixture is prepared by adding a composite.
Accordingly, it is more flexible and can be bent well, has resilience, is convenient to use, safety is improved, and can prevent the waste of lead, as well as improve the performance of shielding radiation.

Description

Tungsten sheet having flexibility and restorability using tungsten powder, garment made from the same and manufacturing method thereof {Tungsten Sheet with Flexibility and Restoration using tungsten powder, Cloth made thus and Manufacturing Method}

The present invention relates to a tungsten sheet having flexibility and resilience, to a garment made thereof, and a method for manufacturing the same, in particular, having a flexibility and resilience of a sheet shape manufactured using tungsten powder as a main raw material to shield gamma radiation and to have flexibility and resilience. A tungsten sheet, a garment made thereof, and a method of manufacturing the same.

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 is possible to block through dense materials such as concrete, iron, and lead, but it is necessary to have a thickness of about 10 cm even if the lead that can block the most is used.

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. Tungsten sheet made of a shielding material that can safely shield the radiation contamination of workers working under the conditions of generating radiation 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. .

In addition, lead, which is typically used as a turn of radiation, is a heavy metal that is not only harmful to health, human body, environment, etc., but also may cause environmental pollution during disposal.

Therefore, it is more preferable if the environment-friendly and safety which does not harm a human body can be ensured more.

Accordingly, it is an object of the present invention to provide a tungsten 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 tungsten sheet, a garment made thereof, and a method of manufacturing the same, having flexibility and resilience to improve the environmental friendliness and safety that can reduce the harmful effects of heavy metals such as lead.

Further, another object of the present invention is to provide a tungsten sheet, a garment made thereof, and a method of manufacturing the same, which have flexibility and resilience in which breakage, dropping, and the like do not occur.

Still another object of the present invention is to provide a tungsten sheet, a garment made thereof, and a method of manufacturing the same, having flexibility and resilience that can relatively improve the coverage.

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

Further, another object of the present invention is to provide a tungsten sheet, a garment made thereof, and a manufacturing method thereof having flexibility and resilience that can improve shielding effect than lead.

The object is a powdered tungsten; It is achieved by a tungsten sheet having a flexible and resilient sheet shape, characterized in that the composite is produced by adding a composite to the tungsten powder.

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

In addition, the content of the tungsten powder is in the range of 80 ~ 95wt%, in addition to the molybdenum metal powder having a high-density characteristics, the tungsten powder and the high-density metal powder in the range of 97 ~ 98wt% by combining the high density, high pressure It is preferable to further include an additive which can be molded into.

On the other hand, the object of the present invention is also achieved by a flexible and resilient radiation sheet comprising the tungsten sheet of claim 1.

On the other hand, an object of the present invention, the step of mixing the powdered tungsten and the composite; It is also achieved by a method of manufacturing a tungsten sheet and clothes comprising a; forming a high-density sheet by molding at a high pressure.

In addition, the composite includes an isocyanate-based ester polymer compound, the content of the tungsten powder is in the range of 80 ~ 95wt%, in addition to the molybdenum metal powder having a high density of properties, the tungsten powder and the high density metal powder It is preferable that it is the range of 97-98 wt%.

According to the present invention, it is more flexible and excellent in resilience.

In addition, the tungsten sheet can be produced simply and conveniently, thereby improving economic efficiency.

In addition, the tungsten powder as a main component can improve the environmental friendliness and safety that can reduce the harmful effects of heavy metals such as lead.

In addition, although the powder is manufactured as a main component, it is press-molded at a high density to have flexibility while not breaking or falling off.

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.

The present invention also provides a tungsten sheet, a garment made thereof, and a method of manufacturing the same, wherein the tungsten sheet has flexibility and restorability which can be easily detached and detached.

In addition, the present invention provides a tungsten sheet, a garment made from the same, and a method of manufacturing the same, having flexibility and resilience to improve shielding effect over lead.

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

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

Hereinafter, the present invention will be described in detail with reference to FIGS. 1 (a) to 2. Hereinafter, a case of applying to a radiation shielding suit as an example of use of the tungsten sheet 100 manufactured by the present invention for convenience of description, but the present invention is not limited to this embodiment. On the other hand, the tungsten sheet 100 according to the present invention has been described with respect to the garment in one embodiment, the scope of application is not limited to the garment.

When the tungsten sheet 100 according to the present invention is used in a radiation shielding cloth, the tungsten sheet 100 mainly has a function of shielding gamma rays or X-rays having straightness among the above-described types of radiation.

In the mixing step (S310), as shown in FIGS. 1A to 2, a high density metal powder containing tungsten and molybdenum powder, which are main materials, is mixed with a component 110 in a mixer 110 or the like to mix a mixed material. Create In this case, the mixing means may use various kinds of mixing means 110 including a mixer and the like. However, since tungsten and a high density metal are 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 powder tungsten is preferably 80 to 95wt% 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 tungsten of less than 80 wt% or more than 95 wt%. Hereinafter, the shielding rate, which can shield the gamma ray, among the radiation, depends on the mixing ratio of the powder tungsten and the thickness of the plate-shaped material 140 according to the present invention. That is, the shielding ratio of the powdered tungsten is 80wt% and 95wt% in the material 140 of the same thickness is different, and when the ratio of the same powder tungsten is thicker the higher the density, the higher the shielding rate of gamma radiation . Tungsten is a material capable of shielding gamma rays having straightness. In the present invention, the application of such tungsten in powder form is one feature. The powder tungsten to be used is preferably a high purity powder tungsten having an excellent shielding ratio of radiation.

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

In addition to the tungsten powder used as the main material, it is preferable to further include a metal powder such as molybdenum and platinum having high density characteristics. These can be mixed with tungsten powder to form denser sheets. Here, the total of tungsten powder and high density metal powder is preferably 97 to 98 wt%. It is preferable that the weight ratio of tungsten powder is 95 to 99% in a high density metal powder. Other types of high density metal powders are added to the tungsten powder to further improve the density between the tungsten powders but may be added in very small amounts.

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, powder tungsten or dense metal powder, a high molecular compound, additives, etc. is 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 powder tungsten, 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 the radiation shielding suit 100 made of tungsten sheet 140 according to the present invention in the form of an open front like a conventional vest, using a Velcro tape 170 is very convenient and It is provided in the form of a single plate that does not require a seam or a hole, thereby improving 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.

Tungsten sheet having flexibility and resilience using tungsten powder according to the present invention has a much better shielding ratio of gamma rays in radiation than lead mainly used in radiation shielding clothing. In addition, lead is a heavy metal that is harmful to health, human body and environment during use and may be fatal in some cases. In addition, a product made of lead has a problem of polluting the environment and the like even when disposed of. For example, lead is a heavy metal that causes cancer and disease, and is very addictive, and in some cases may cause brain nervous system, intestinal dysfunction, etc. Thus, according to the present invention, The performance can be further improved while eliminating the waste.

However, the tungsten sheet having flexibility and resilience using the tungsten powder according to the present invention and the garment made therefrom are not harmful to the human body like lead and can further protect the human body from radiation.

On the other hand, conventional tungsten plate or sheet fabrication takes place at high temperatures of thousands of degrees and requires complex and expensive equipment. However, according to the present invention, a tungsten sheet having a high density and flexibility and resilience can be produced simply and conveniently, unlike the prior art, thereby improving economic efficiency. For example, the tungsten sheet was applied to shield the gamma ray, especially among the radiation, but in addition, it may be used for various purposes such as medical and industrial purposes. The tungsten powder may be used in various applications by varying the blending ratio, manufacturing method, and the like.

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. The scope of the invention will be determined by the appended claims and their equivalents.

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

Claims (6)

Powdered tungsten;
The compound is prepared by adding a composite to the tungsten powder,
The composite has a flexible and resilient sheet shape including methylene diphenyl diisocyanate (MDI) in an isocyanate ester polymer compound,
Tungsten sheet having a sheet shape having a flexible and resilient, characterized in that the thickness of the sheet shape is 2 ~ 6mm. delete The method of claim 1,
The content of the tungsten powder is in the range of 80 to 95 wt%,
In addition, it contains a metal powder having a high density of properties,
The tungsten sheet having a flexible and resilient sheet shape, characterized in that the tungsten powder and the high-density metal powder is in the range of 97 ~ 98 wt%, and further comprising an additive capable of forming at high density and high pressure. A flexible and resilient garment comprising the tungsten sheet of claim 1. Mixing the powdered tungsten and the composite;
Forming at high pressure to form a high-density sheet shape; includes,
The composite has a flexible and resilient sheet shape including methylene diphenyl diisocyanate (MDI) in an isocyanate ester polymer compound,
The sheet-shaped thickness is 2 ~ 6mm, tungsten sheet and a method of manufacturing the garment. The method of claim 5,
The content of the tungsten powder is in the range of 80 to 95wt%,
In addition, it contains molybdenum metal powder having a high density of properties,
The tungsten powder and the high-density metal powder is in the range of 97 ~ 98wt%, tungsten sheet and method of manufacturing the garment.

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