KR20240000224A - Full body radiation shield and manufacturing method thereof - Google Patents

Abstract

The present invention provides a full body radiation shielding suit, which includes: a first part (100) consisting of a first fabric and including a torso part (110); a second part (200) consisting of a second fabric and including a limb part (210) and a head part (220); and a connecting part (300) connecting the first part and the second part, wherein the first and second fabrics contain different radiation shielding materials and satisfy the following relationship 1. [Relationship 1] T_1/T_2 >= 2 (In the relationship 1, T_1 is the average thickness (mm) of the first fabric, and T_2 is the average thickness (mm) of the second fabric.) The present invention increases a shielding rate against gamma rays and neutrons.

Description

Full body radiation shielding suit and method of manufacturing same {FULL BODY RADIATION SHIELD AND MANUFACTURING METHOD THEREOF}

The present invention relates to a full body radiation shielding suit and a method of manufacturing the same. In detail, the first and second fabrics containing different radiation shielding materials and configured to have different thicknesses are used to form a first part and a yarn including the body, respectively. This relates to a full-body radiation-shielding suit that allows radiation shielding for the entire body by applying it to the second part, including the branches and head, and is light in weight and has excellent mobility.

Radiation can be broadly divided into ionizing radiation and non-ionizing radiation, and radiation generally refers to ionizing radiation. Ionizing radiation refers to radiation such as alpha rays, beta rays, protons, neutrons, gamma rays, and X-rays that cause ionization when passing through materials. Non-ionizing radiation refers to radiation that has low energy and cannot create ions when passing through materials or has a very low probability of creating ions. Specifically, it includes infrared rays, visible light, and ultraviolet rays.

Alpha rays are absorbed and blocked by materials as thick as paper, and stop instantly in the air, so there is no need for special shielding. Beta rays are known to be larger than alpha rays, but can generally be blocked with a thin aluminum foil or plastic plate.

On the other hand, gamma rays and neutrons can change the main structure of DNA or proteins by acting directly on atoms or molecules, and when they act on germ cells of organisms, they can induce mutations and increase the probability of causing malformations. In particular, because it can cause diseases such as cancer when it acts on the human body, radiation shielding clothing that can shield gamma rays and/or neutrons harmful to the human body is essential in fields where radiation is applied.

Previously, lead was mainly used for radiation shielding, but lead is not only toxic to the human body when repeatedly contacted for a long period of time, but is also heavy to use as a radiation shielding suit, is a burden to the human body when worn for a long time, and is difficult to process. It has the disadvantage of being less flexible.

In order to reduce the weight burden caused by the use of lead, radiation shielding clothing in the form of a vest is mainly manufactured. Although it can have a radiation shielding effect on the torso, other body parts other than the torso can be exposed to serious risk.

Accordingly, Korean Patent No. 10-0889286 (March 11, 2009) discloses a polyethylene radiation shielding material containing lead and radiation absorbing materials such as boron, and a method for manufacturing the same. However, this also contains lead, which is harmful to the human body. This exists.

Therefore, there is a need for lead-free radiation shielding clothing that is harmless to the human body, increases activity by reducing the weight burden when worn, and has excellent radiation shielding effect on the whole body.

Republic of Korea Patent No. 10-0889286 (2009.03.11)

The purpose of the present invention is to provide a full-body radiation shielding suit that can shield not only the torso, but also the entire body, including the limbs and head, from radiation and has excellent shielding ability against gamma rays and neutrons.

In addition, by specially processing the torso and the connecting parts of parts other than the torso, it is possible to connect fabrics of different types and thicknesses, as well as provide excellent strength and block the penetration of radiation through the connecting parts, thereby ensuring safety throughout the body. Radiation shielding clothing is provided.

In addition, by not using lead, the weight is reduced compared to lead-containing radiation shielding suits, providing a full-body radiation shielding suit with excellent mobility for the wearer.

The present invention is comprised of a first fabric and includes a first portion 100 including a body portion 110; A second portion (200) composed of a second fabric and including limb portions (210) and a head portion (220); And a connection part 300 connecting the first part and the second part, wherein the first fabric and the second fabric contain different radiation shielding materials and satisfy the following relational equation 1. Radiation shielding clothing is provided.

[Relationship 1]

T ₁ /T ₂ ≥ 2

(In the above relational equation 1, T ₁ is the average thickness (mm) of the first fabric, and T ₂ is the average thickness (mm) of the second fabric.)

According to one aspect, the first fabric includes one or more first radiation shielding materials selected from the group consisting of tungsten, barium sulfate, and bismuth, and the second fabric includes bismuth oxide, magnesium oxide, iron oxide, and graphene oxide. It may include one or more second radiation shielding materials selected from the group consisting of

According to one aspect, the connection portion 300 includes a suture portion 310 of the first fabric and the second fabric; And it may include a seam sealing part 320 laminated on the upper part of the suture part.

According to one aspect, the seam sealing portion 320 may include low molecular weight polyolefin.

The present invention also provides a method for manufacturing a full body radiation shielding suit according to an aspect of the present invention, a) a first fabric containing at least one first radiation shielding material selected from the group consisting of tungsten, barium sulfate, and bismuth. manufacturing step; b) manufacturing a second fabric containing at least one second radiation shielding material selected from the group consisting of bismuth oxide, magnesium oxide, iron oxide, and graphene oxide; And c) providing a method of manufacturing a full-body radiation shielding suit, including the step of connecting the manufactured first fabric and the second fabric by suturing.

The full-body radiation shielding suit according to the present invention is capable of shielding the entire body from radiation, including the torso, extremities, and head, and has the advantage of showing excellent radiation shielding ability by increasing the shielding rate against gamma rays and neutrons in particular.

In addition, excellent strength and radiation shielding ability can be secured at the torso and the joints of parts other than the torso, ensuring not only durability but also safety by blocking the phenomenon of radiation penetrating at the joints of different fabrics.

In addition, since lead is not used, there is no toxicity problem for the human body, and the wearer's activity can be improved by reducing the weight.

Figure 1 is a diagram showing the configuration of a full-body radiation shielding suit according to an embodiment of the present invention.
Figure 2 is a diagram showing the structure of a connection part of a full-body radiation shielding suit according to an embodiment of the present invention.
Figure 3 is a diagram showing the structure of a connection part of a full-body radiation shielding suit according to an embodiment of the present invention.

The advantages and features of the present invention and methods for achieving them will become clear with reference to the embodiments described in detail below. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. The present embodiments only serve to ensure that the disclosure of the present invention is complete and that common knowledge in the technical field to which the present invention pertains is not limited. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. “And/or” includes each and every combination of one or more of the mentioned items.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used with meanings that can be commonly understood by those skilled in the art to which the present invention pertains. When a part in the entire specification is said to “include” a certain element, this means that it may further include other elements rather than excluding other elements, unless specifically stated to the contrary. The singular also includes the plural, unless specifically stated in the phrase.

In this specification, terms such as “first” and “second” are used to distinguish one component from another component, and the scope of rights should not be limited by these terms. For example, a first component may be named a second component, and similarly, the second component may also be named a first component.

In this specification, the identification code for each step is used for convenience of explanation. The identification code does not describe the order of each step, and each step is performed differently from the specified order unless a specific order is clearly stated in the context. It can be. That is, each step may be performed in the same order as specified, may be performed substantially simultaneously, or may be performed in the opposite order.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

Figure 1 is a diagram showing the configuration of a full-body radiation shielding suit according to an embodiment of the present invention.

Referring to Figure 1, the full body radiation shielding suit according to one embodiment of the present invention includes a first portion 100 including a torso portion 110; a second portion (200) comprising limbs (210) and a head portion (220); and a connection portion 300 connecting the first portion 100 and the second portion 200.

The first part 100 is made of a first fabric, and the second part 200 is made of a second fabric, and each includes different radiation shielding materials.

Specifically, the first fabric includes one or more first radiation shielding materials selected from the group consisting of tungsten, barium sulfate, and bismuth, and the first fabric may have a laminate structure including an inner layer and an outer layer. At this time, the inner layer refers to the side facing the human body, and the outer layer refers to the side directly exposed to the external environment.

It is advantageous for the first radiation shielding material to be included simultaneously in the inner and outer layers of the first fabric. At this time, the ratio of the content of the first radiation shielding material in the inner layer (W _a1 ): the content of the first radiation shielding material in the outer layer (W _a2 ) is 2: 1 to 8: 1, preferably 3: 1 to 7: 1. You can be satisfied. Accordingly, due to the stepwise radiation shielding effect by the outer and inner layers, the shielding efficiency against gamma rays can be significantly increased, so that not only can high radiation shielding ability be achieved, but the weight burden of the first fabric can be reduced.

Meanwhile, the inner and outer layers of the first fabric contain different resins, thereby ensuring flexibility and durability of the first fabric and providing a shielding effect against neutrons.

To this end, the outer layer contains 0.5 to 15 weight of at least one first resin selected from the group consisting of polyurethane resin, polysiloxane resin, silicone resin, fluorine resin, acrylic resin and alkyd resin, based on 100 parts by weight of the first radiation shielding material. parts, preferably 1 to 12 parts by weight, more preferably 1 to 10 parts by weight.

In addition, the inner layer is one or more selected from the group consisting of polyvinyl alcohol (PVA), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), and low-density polyethylene (LDPE), based on 100 parts by weight of the first radiation shielding material. It may contain 0.5 to 15 parts by weight, preferably 1 to 12 parts by weight, and more preferably 1 to 10 parts by weight of the second resin.

The inner layer may exhibit a synergistic effect with the first radiation shielding material by further including one or more inorganic additives selected from the group consisting of calcium hydroxide, calcium carbonate, magnesium hydroxide, magnesium carbonate, and barium chloride. At this time, the inorganic additive may have an average particle size of 0.01 to 100 ㎛, preferably 0.1 to 100 ㎛, and may be included in an amount of 1 to 30 parts by weight, preferably 2 to 20 parts by weight, based on 100 parts by weight of the radiation shielding material. .

Meanwhile, in order to achieve the above-described shielding effect while reducing the deterioration of wearing comfort due to increased weight, the average thickness of the inner layer in the first fabric is 0.8 times or more, preferably 1 to 2 times, the average thickness of the outer layer. It is desirable to be

The body portion 110 is made of the above-described first fabric, and the body portion 110 further includes a zipper portion 120 as shown in FIG. 1, so that the wearer can easily put on and take off the fabric. The zipper portion 120 may be composed of a vislon zipper or a nylon zipper, and may be described in detail inside the zipper portion 120 in order to effectively block the penetration of radiation through the zipper portion 120. Fabrics identical to the first fabric are layered to form one.

The second fabric includes one or more second radiation shielding materials selected from the group consisting of bismuth oxide, magnesium oxide, iron oxide, and graphene oxide, and the second fabric may have a laminate structure including an inner layer and an outer layer. there is. At this time, the standards for the inner and outer layers are the same as described above.

It is advantageous for the second radiation shielding material to be included simultaneously in the inner and outer layers of the second fabric. At this time, the content of the second radiation shielding material in the inner layer (W _b1 ): The content of the second radiation shielding material in the outer layer (W _b2 ) satisfies 1: 1 to 3: 1, preferably 1.5: 1 to 2.5: 1. You can. Accordingly, the second fabric can efficiently exhibit a uniform radiation shielding effect even in a thin thickness range of 0.5 mm or less, making it possible to reduce the weight of the final manufactured full-body radiation shielding suit. At this time, the average thickness of the inner layer in the second fabric is preferably 0.8 times or more, preferably 1 to 2 times the average thickness of the outer layer.

Meanwhile, the inner and outer layers of the second fabric may include different resins, and the resins included in the inner and outer layers may be the same as those of the first fabric described above. A detailed description of this will be omitted.

The first fabric and the second fabric may further include an outer skin layer formed by thermally bonding a waterproof cloth or non-woven fabric to at least one of the upper surface and the lower surface. At this time, the nonwoven fabric may include one or more selected from the group consisting of polyester, nylon, and blends thereof.

The first fabric and the second fabric include different radiation shielding materials as described above, thereby increasing the shielding rate against gamma rays and neutrons of the first portion 100 including the body portion 110, especially the lungs and heart. While effectively protecting major organs such as the back from high-risk environments, the second area 200, including the extremities 210 and the head 220, is shielded from alpha rays, beta rays, and can be given.

As described above, in terms of ensuring smooth mobility of the wearer through lightweighting as well as excellent radiation shielding ability for the whole body even when exposed to high-risk radiation areas, the first and second fabrics satisfy the following relational equation 1: It is advantageous.

[Relationship 1]

T ₁ /T ₂ ≥ 2

(In the above relational equation 1, T ₁ is the average thickness (mm) of the first fabric, and T ₂ is the average thickness (mm) of the second fabric.)

The first and second fabrics used in the full-body radiation shielding suit according to the present invention satisfy the above relational equation 1, so that the above-described first portion 100 and the second fabric do not cause a decrease in the wearer's activity due to an increase in weight. It can sufficiently perform the role of radiation protection for the area 200.

More specifically, the full body radiation shielding suit according to one embodiment of the present invention further satisfies the following relational equation 2, thereby providing excellent radiation shielding effect for the whole body as well as excellent bonding at the connection portion 300, which will be described later. For this purpose, the average thickness T ₁ of the first fabric constituting the first portion 100 including the body portion 110 is 5 mm or less, preferably 0.5 to 4 mm, more preferably 1 to 3.5 mm. It is advantageous to satisfy, and the average thickness T ₂ of the second fabric constituting the second portion 200 including the limb portion 210 and the head portion 220 is 0.5 mm or less, preferably 0.1 to 0.4 mm. , more preferably 0.15 to 0.35 mm.

[Relational Expression 2]

3≤ T ₁ /T ₂ ≤ 10

(In the above relational equation 2, T ₁ is the average thickness (mm) of the first fabric, and T ₂ is the average thickness (mm) of the second fabric.)

The connection portion 300 is a portion that connects the first fabric and the second fabric, and specifically, as shown in Figure 2, the suture portion 310 of the first fabric and the second fabric; And it may include a seam sealing part 320 laminated on the upper part of the suture part 310.

The seam 310 can be formed by sewing on the first fabric and the second fabric. The sewing refers to any operation in which one or more sewing threads or yarn is passed through the material being sewn, and the suture 310 according to an embodiment of the present invention is sewing using spun yarn. It can be formed through.

The spun yarn may include a blend of polyester fiber and one or more alternative fibers selected from the group consisting of nylon, cotton, wool, glass, mineral, aramid, and rayon. At this time, the alternative fiber and/or polyester fiber may contain 1 to 10% by weight, preferably 2 to 8% by weight, of at least one selected from the group consisting of metal powder and metal oxide powder.

Specifically, the metal powder may include one or more selected from the group consisting of aluminum, titanium, zirconium, scandium, yttrium, cobalt, tantalum, molybdenum, and tungsten, and the metal oxide powder may include palladium oxide, iridium oxide, and tungsten. It may include one or more selected from the group consisting of ruthenium, osmium oxide, rhodium oxide, platinum oxide, iron oxide, nickel oxide, cobalt oxide, indium oxide, aluminum oxide, potassium oxide, titanium oxide, tungsten oxide, and magnesium oxide. At this time, the metal and metal oxide powder may be used independently or in a composite form.

The full body radiation shielding suit according to one embodiment of the present invention uses the above-described spun yarn to form the suture portion 310 of the first fabric and the second fabric to increase electron density, thereby reducing the radiation from the suture portion 310. It can have a shielding effect.

According to one embodiment of the present invention, the suture portion 310 may be configured to be adhered to the lower part of the first fabric or the second fabric. Specifically, as shown in FIG. 3, a more improved radiation shielding effect can be achieved by folding and adhesively fixing the suture portion 310 toward the first portion 100 made of the first fabric. Meanwhile, in FIG. 3, a structure in which the suture portion 310 is glued toward the first portion 100 is shown, but the structure is not limited thereto.

The adhesion can be performed by a conventional adhesion method using an adhesive, and the adhesive used at this time is composed of one or more adhesive resins selected from the group consisting of phenol resin, epoxy resin, and acrylic resin, so that it can be bonded quickly without damaging the fabric. Adhesion becomes possible.

The seam sealing portion 320 is formed by lamination on the upper part of the suture portion 310, and may preferably be made of a polyethylene-based film. More specifically, the polyethylene-based film may be characterized by having a linear low density polyethylene (LLDPE) resin content of 80% by weight or more, preferably 90% by weight or more.

Accordingly, the penetration of radiation through the fine sewing hole formed by the suture portion 310 can be efficiently blocked and sufficient strength can be exhibited. At this time, sufficient strength is required to firmly fix the connecting portion 300 connecting the above-described first and second fabrics so that the connecting portion 300 is not damaged even during repeated donning and doffing processes and is not only physically fixed but also secures the first portion. (100), refers to the strength maintained to efficiently demonstrate the above-described radiation shielding performance of the second portion (200) and the connecting portion (300).

The present invention also provides a method of manufacturing a full-body radiation shielding suit according to an embodiment of the present invention. Specifically, the manufacturing method includes the steps of: a) manufacturing a first fabric containing at least one first radiation shielding material selected from the group consisting of tungsten, barium sulfate, and bismuth; b) manufacturing a second fabric containing at least one second radiation shielding material selected from the group consisting of bismuth oxide, magnesium oxide, iron oxide, and graphene oxide; and c) connecting the manufactured first fabric and second fabric by sewing.

In step a), the first fabric constituting the first portion 100 including the body portion 110 is manufactured.

First, a first radiation shielding material with controlled particle size is prepared by mixing and pulverizing at least one selected from the group consisting of tungsten, barium sulfate, and bismuth. The grinding can be done using a conventional grinding method, preferably using a ball mill, and can be adjusted to an average particle size of 0.1 to 20 ㎛, preferably 0.5 to 15 ㎛, and more preferably 1 to 10 ㎛. .

Then, the prepared first radiation shielding material is mixed with at least one first resin selected from the group consisting of polyvinyl alcohol (PVA), medium density polyethylene (MDPE), high density polyethylene (HDPE), and low density polyethylene (LDPE). and molding to produce the inner layer. At this time, based on 100 parts by weight of the radiation shielding material, 0.5 to 15 parts by weight of the first resin may be included, preferably 1 to 12 parts by weight, and more preferably 1 to 10 parts by weight.

Next, the prepared first radiation shielding material is mixed and molded with one or more second resins selected from the group consisting of polyurethane resin, polysiloxane resin, silicone resin, fluorine resin, acrylic resin, and alkyd resin to prepare an outer layer. At this time, based on 100 parts by weight of the first radiation shielding material, 0.5 to 15 parts by weight, preferably 1 to 12 parts by weight, and more preferably 1 to 10 parts by weight of the second resin may be included.

A content ratio of the first radiation shielding material in the inner layer and the outer layer forming the first fabric; and the thickness ratio of the inner layer and the outer layer is the same as described above.

In step b), the second fabric constituting the second portion 200 including the limb portion 210 and the head portion 220 is manufactured.

First, a second radiation shielding material with controlled particle size is prepared by mixing and pulverizing at least one selected from the group consisting of bismuth oxide, magnesium oxide, iron oxide, and graphene oxide. At this time, grinding may be performed in the same manner as step a) described above.

Next, the prepared second radiation shielding material is mixed with at least one first resin selected from the group consisting of polyvinyl alcohol (PVA), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), and low-density polyethylene (LDPE), and The inner layer is manufactured by molding. At this time, based on 100 parts by weight of the radiation shielding material, 0.5 to 15 parts by weight of the first resin may be included, preferably 1 to 12 parts by weight, and more preferably 1 to 10 parts by weight.

Next, the prepared second radiation shielding material is mixed and molded with one or more second resins selected from the group consisting of polyurethane resin, polysiloxane resin, silicone resin, fluorine resin, acrylic resin, and alkyd resin to prepare an outer layer. At this time, based on 100 parts by weight of the second radiation shielding material, 0.5 to 15 parts by weight, preferably 1 to 12 parts by weight, and more preferably 1 to 10 parts by weight of the second resin may be included.

Meanwhile, the content ratio of the second radiation shielding material in the inner layer and the outer layer forming the second fabric; and the thickness ratio of the inner layer and the outer layer is the same as described above.

In step c), the manufactured first fabric and second fabric are connected by sewing.

First, the manufactured first fabric and the distal ends of the second fabric are fixedly placed against each other so that the boundaries of the distal ends coincide, and then sewn to form a seam portion 310. At this time, the suturing process can be performed using spun yarn, and the spun yarn is a blend of polyester fiber and one or more alternative fibers selected from the group consisting of nylon, cotton, wool, glass, minerals, aramid, and rayon. may include. The alternative fiber and/or polyester fiber may exhibit a radiation shielding effect in the suture portion 310 by including at least one selected from the group consisting of metal powder and metal oxide powder.

The metal and metal oxide powder are the same as described above.

Next, a seam sealing portion 320 is formed by stacking the upper portion of the formed suture portion 310. Specifically, a polyethylene-based film can be formed by heat-sealing at 200 to 500°C, preferably 250 to 400°C. At this time, the polyethylene-based film preferably has a linear low-density polyethylene (LLDPE) resin content of 80% by weight or more or 90% by weight or more. Accordingly, the hole formed in the seam 310 is blocked to block the penetration of radiation through it and to each other. First and second fabrics with different material and thickness characteristics can be firmly fixed.

The full-body radiation-shielding suit manufactured according to one embodiment of the present invention exhibits excellent radiation-shielding ability for the entire body, particularly the first portion 100 including the torso 110; And excellent strength is achieved through suturing and seam sealing of the connection parts connecting the different fabrics that make up the second part 200 including the limbs 210 and the head 220, as well as the strength through the connection parts. Safety and durability can be secured by blocking radiation penetration.

Hereinafter, the present invention will be described in detail through examples. However, these are intended to illustrate the present invention in more detail, and the scope of the present invention is not limited to the following examples.

Example

(Example 1)

First and second fabrics were manufactured with the compositions shown in Table 1 below, respectively. At this time, the ratio of the content of the radiation shielding material in the inner layer of the first and second fabrics to the content of the radiation shielding material in the outer layer was adjusted to be 5:1 and 2:1, respectively.

Next, a seam was formed to connect the manufactured first and second fabrics. Specifically, it was sewn using a nylon/polyester fiber blend containing 3% by weight of tungsten.

Content (parts by weight) my
One
one
step inner layer Tungsten: 8 parts barium sulfate mixture. 100 medium density polyethylene (MDPE); 8 Thickness (mm) 0.4 outer layer Barium sulfate: 1:1 mixture of bismuth 100 Polyurethane (M _W 100,000∼150,000) 8 Thickness (mm) 0.6 my
2
one
step inner layer Bismuth oxide: 8:2 mixture of magnesium oxide 100 medium density polyethylene (MDPE); 8 Thickness (mm) 0.2 outer layer Magnesium oxide: A 1:1 mixture of iron oxide. 100 Polyurethane (M _W 100,000∼150,000) 8 Thickness (mm) 0.3

In Table 1, the mixing ratio in the mixture refers to the mixing weight ratio.

(Example 2)

When connecting the first fabric and the second fabric prepared in Example 1, the seam sealing portion was further formed on the top using a polyethylene-based film with a linear low-density polyethylene resin content of 90% by weight or more after forming the sealing portion. This was carried out to produce a radiation shielding fabric test specimen.

(Example 3)

A radiation shielding fabric test specimen was manufactured in the same manner as in Example 2, except that the first and second fabrics were manufactured under the conditions shown in Table 2 below.

content my
One
one
step inner layer Tungsten: 8 parts barium sulfate mixture. 100 medium density polyethylene (MDPE); 8 Thickness (mm) One outer layer Barium sulfate: 1:1 mixture of bismuth 100 Polyurethane (M _W 100,000∼150,000) 8 Thickness (mm) 0.6 my
2
one
step inner layer Bismuth oxide: 8:2 mixture of magnesium oxide 100 medium density polyethylene (MDPE); 8 Thickness (mm) 0.2 outer layer Magnesium oxide: A 1:1 mixture of iron oxide. 100 Polyurethane (M _W 100,000∼150,000) 8 Thickness (mm) 0.2

In Table 1, the mixing ratio in the mixture refers to the mixing weight ratio.

(Example 4)

A radiation shielding fabric test specimen was manufactured in the same manner as in Example 3, except that 10% by weight of barium chloride was added when manufacturing the inner layer of the first fabric.

Evaluation Example 1: Gamma-ray shielding performance evaluation

The gamma ray shielding rate was evaluated for the first fabric, second fabric, and radiation shielding fabric test specimens manufactured according to Examples 1 to 4, respectively, and the results are shown in Table 3 below. When evaluating the radiation shielding fabric test specimen, the connection portion of the first and second fabrics was placed at the center.

Specifically, using the Harwell Amber perspex Dosimeter, Batch Ⅴ3042 from Harwell, UK, the irradiation dose of gamma rays generated from the irradiation source (Co-60 Activity 360, 576 Ci, average energy 1.25 MeV class) was divided into cases with and without shielding, respectively. The amount of gamma ray leakage detected by a detector 3.25 m away from the source was measured and obtained as a ratio.

Evaluation Example 2: Neutron shielding performance evaluation

The neutron shielding rate was evaluated for the first fabric, second fabric, and radiation shielding fabric test specimens manufactured according to Examples 1 to 4 and Comparative Examples 1 to 3, respectively, and the results are shown in Table 3 below. When evaluating the radiation shielding fabric test specimen, the connection portion of the first and second fabrics was placed at the center.

Specifically, a neutron beam exit of a certain size was created, a neutron intensity measurement detector was placed at a constant distance (5 cm) from the exit, and the intensity of neutrons passing through each shield was measured, and the neutron absorption cross-sectional area coefficient was calculated using Equation 1 below. was calculated.

[Calculation Formula 1]

(In the above calculation equation 1, I ₀ is the intensity of the incident beam, I is the intensity of the transmitted beam, x is the transmission thickness, and μ is the neutron absorption cross-sectional area coefficient.)

1st fabric 2nd fabric Shielding fabric test specimen Gamma ray shielding rate μ (cm ^-1 ) gamma rays
Shielding rate μ (cm ^-1 ) gamma rays
Shielding rate μ (cm ^-1 ) Example 1 83.7% 5.2 74.2% 4.5 78.8% 4.9 Example 2 83.7% 5.2 74.2% 4.5 80.2% 5.3 Example 3 86.5% 5.9 78.5% 5.1 83.4% 5.7 Example 4 87.8% 6.2 78.5% 5.1 85.3% 5.8

As can be seen in Table 3, the radiation shielding fabric test specimen manufactured according to the present invention showed excellent gamma ray and neutron shielding ability despite containing connection parts of different fabrics.

In particular, it can be seen that Examples 2 to 4, in which a seam portion and a seam sealing portion were simultaneously formed at the connection portion of the first fabric and the second fabric, showed superior shielding ability compared to Example 1 in which only the suture portion was formed.

Meanwhile, Example 3, which satisfies the most desirable thickness conditions presented in the present invention, showed improved shielding ability compared to Example 2, which did not, and Example 4 showed an increase in radiation shielding material and inorganic additives in the first fabric. It is believed that the shielding ability against both gamma rays and neutrons has increased due to the effect.

100: Part 1
110: body; 120: Zipper part
200: Part 2
210: limb; 220: header
300: Connection part
310: suture; 320: Seam sealing part

Claims (5)

A first part 100 made of a first fabric and including a body part 110;
A second portion (200) composed of a second fabric and including limb portions (210) and a head portion (220); and
It includes a connection part 300 connecting the first part and the second part,
A full body radiation shielding suit, characterized in that the first fabric and the second fabric contain different radiation shielding materials and satisfy the following relational equation 1:
[Relationship 1]
T ₁ /T ₂ ≥ 2
(In the above relational equation 1, T ₁ is the average thickness (mm) of the first fabric, and T ₂ is the average thickness (mm) of the second fabric.) According to paragraph 1,
The first fabric includes one or more first radiation shielding materials selected from the group consisting of tungsten, barium sulfate, and bismuth,
The second fabric is a full body radiation shielding suit comprising at least one second radiation shielding material selected from the group consisting of bismuth oxide, magnesium oxide, iron oxide, and graphene oxide. According to paragraph 1,
The connection portion 300 includes a suture portion 310 of the first fabric and the second fabric; And a full-body radiation shielding suit comprising a seam sealing portion 320 laminated on the upper portion of the suture portion. According to paragraph 3,
The seam sealing portion 320 is a full-body radiation shielding suit comprising low-molecular-weight polyolefin. In the method of manufacturing a full-body radiation shielding suit according to any one of claims 1 to 4,
a) manufacturing a first fabric containing at least one first radiation shielding material selected from the group consisting of tungsten, barium sulfate, and bismuth;
b) manufacturing a second fabric containing at least one second radiation shielding material selected from the group consisting of bismuth oxide, magnesium oxide, iron oxide, and graphene oxide; and
c) A method of manufacturing a full-body radiation shielding suit, comprising the step of connecting the manufactured first fabric and second fabric by suturing.

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