JPH0291599A - Shielding material for radiant ray - Google Patents

Abstract

PURPOSE:To obtain a shielding effect against a radiant ray, and also, to curtail the use quantity of lead, and to make radiant ray protective clothes light in weight by arranging densely spherulitic bodies of lead and attaching them to a flexible material layer. CONSTITUTION:A shielding material 11 for a radiant ray is formed by attaching many spherulitic bodies of lead to a sheet-like flexible material layer 12 in a state that they are arranged densely, and a ground fabric 14 is superposed on the flexible material layer 12. Also, the spherulitic bodies 13 of lead are fixed to the flexible material layer 12 by utilizing adhesive strength of the flexible material layer 12, attached so as to be arranged densely like a plane, and also, the spherical diameter of the spherulitic bodies 13 to be used is selected suitably. In such a way, the spherulitic bodies 13 display a shielding effect against a radiant ray, and also, the weight can b lightened due to curtailment of the use quantity of lead as a whole, and since the spherulitic bodies are independent, respectively, flexibility is obtained, and protective clothes fitted to the body can be constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a radiation shielding material used to protect the human body from radiation.

[Prior art] In environments where the human body is exposed to particle beams, electromagnetic waves, X-rays, and gamma rays (hereinafter simply referred to as radiation) emitted from radionuclides, it is necessary to protect the human body from radiation. It is mandatory to wear protective clothing made using

Conventionally, the radiation shielding material used in the production of the above-mentioned protective clothing was formed by inserting a lead plate 2 inside a rubber temporary 1, and this was incorporated into the clothing. .

[Problem to be solved by the invention]

By the way, shielding materials using lead plates are not only heavy but also lack flexibility, and clothing in which they are incorporated do not fit the body well, making work movements slow and tiring.

In addition, the parts of the human body that particularly need to be protected from radiation are the mammary glands, thyroid, gonads, etc. In order to protect these parts, the thickness of the lead plate must be increased, and each of the above Since it is not possible to thicken the lead plate only in the corresponding parts, there is a problem that the overall weight inevitably increases.

An object of the present invention is to provide a radiation shielding material that reduces overall weight, provides a good fit to the body, and allows partial adjustment of shielding efficiency to solve the above-mentioned problems. There is a particular thing.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention has a structure in which lead spherules are closely arranged and attached to a flexible material layer.

[Effect]

Since lead spherules are closely arranged and attached to a sheet-shaped flexible material layer, the spherules have a radiation shielding effect, and the overall reduction in the number of lead users reduces FFI bonds. It can be made lightweight, and since the spherules are individually independent, it has flexibility and can be used to construct protective clothing that fits the body.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the radiation shielding material 11 is formed by attaching a large number of lead spherules 13 to a sheet-shaped flexible material layer 12 in a state in which they are closely arranged. A base cloth 14 is overlaid thereon.

As the material for forming the flexible material layer 12, in addition to silicone, various synthetic resins such as Teflon and Fess may be used, and the base fabric 14 may be gauze, various fabrics, or synthetic resin sheets.

Moreover, the lead spherules 13 are made of flexible material F! J12 is fixed by using the adhesive force of the flexible material layer 12, and the spherules 1 to be used are attached so as to be closely arranged in a plane.
The ball diameter of No. 3 may be appropriately selected, for example, within the range of 0.5 mm to 2 fences.

Further, the lead spherules 13 may have the same diameter throughout, but as shown in FIG.
A part in which the spherical bodies 13b having a small diameter are arranged together with a part in which the spherical bodies 13b having a small spherical diameter are arranged are mixed, so that the part in which the spherical bodies 13a having a large spherical diameter are arranged corresponds to a part of the body that particularly requires protection. It's okay.

To manufacture the shielding material 11, as shown in FIG.
A flexible material layer 12 is coated and formed on the flexible material layer 12 to a suitable thickness.
While the Q material layer 12 maintains its adhesiveness, a large number of spherules 13 are sprinkled on its upper surface.

As shown in FIG. 2, with the FOP granules 13 stacked up and down, the base fabric 14 is tilted, etc., and the granules 13 are rolled in the plane direction of the flexible material layer 12. Distributed in the plane direction.

Possible) The spherical bodies 13 that are in direct contact with the spheroidal material N12 are fixed to the flexible material layer 12 by adhesive force, and the objects on the spherical bodies 13 roll, so that the space between the spherical bodies 13 is This fills the space, thereby adhering the spherical bodies 13 to the entire surface of the flexible material layer 12 in a densely arranged state.

Thereafter, when the base fabric 14 is reversed or tilted to remove the spherules not bonded to the flexible layer 12, only the spherules 13 bonded to the flexible layer 12 are removed, as shown in FIG. The remaining shielding material 11 is obtained in which the Lp particles 13 are densely arranged in a single layer on the flexible material layer 12.

FIG. 4 shows an example of a shielding material 11 in which a flexible material layer 12 and a base material 14 are further laminated on the spherical bodies 13, and a group of spherical bodies 13 is sandwiched therebetween.

In addition, by fixing the spherical bodies 13 in parallel to the flexible material layer 12 using the above-mentioned fixing means, it is possible to obtain a shielding rate of, for example, about 92 to 98% with respect to the surface of the flexible material layer 12. , and the radiation shielding effect can be fully demonstrated.

Moreover, in order to form portions of the spherical bodies 13 having different spherical diameters,
What is necessary is to change the dispersion area for each different ball diameter.

Furthermore, in order to obtain a desired shielding rate, ty particles having different spherical diameters may be mixed in advance and sprayed.

FIG. 1 shows an example of protective clothing manufactured using the above-mentioned shielding material 11.
It was cut and sewn with it sandwiched in between.

The above-mentioned protective clothing IA is not limited to the hest shape as shown in the figure, but can be freely selected depending on the conditions of the place of use. Protective clothing can be formed that can accommodate a wide range of usage conditions.

In addition, since the sewing strength around the flexible material layer 12 after cutting in the shielding material 11ζ is weak, the base fabric 14 may be used on the entire surface, but it is preferable to overlap the base fabric only on the part where Klm is completely formed. It's okay.

〔Effect of the invention〕

As described above, according to the present invention, since the lead spherules are closely arranged and attached on the disposable material layer A, the spherules provide a radiation shielding effect, and the overall amount of shipping can be reduced. This makes it possible to make radiation protection clothing lighter and more concealable.

Furthermore, the combination of the flexible material layer and the spherules provides flexibility, making it possible to form protective clothing that fits the body.

Furthermore, by selecting the spherical diameter of the spherules, shielding materials with various shielding ratios can be formed, and partial changes in the shielding ratio can also be obtained by selecting a combination of spherical diameters.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a protective garment using the shielding material according to the present invention, FIGS. 2 and 3 are cross-sectional views showing the manufacturing order of the shielding garment, and FIG. 4 is another example of the shielding material. 5th cross-sectional view showing
The figure is a sectional view of a conventional shielding material. 11... Shielding material, 12... Flexible material layer, 13... Lead spherules, 14...
Base cloth. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (2)

[Claims] (1) A radiation shielding material in which lead spherules are closely arranged and attached to a flexible material layer. (2) The radiation shielding material according to claim (1), wherein the lead spherules are used in combination with spherules having different particle sizes.