JPH0786553B2 - Radiation protection suit - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation protective suit used for protecting a human body from X-rays and α-rays in hospitals and nuclear power plants that handle radiation.

2. Description of the Related Art A radiation protection suit having a structure in which a radiation shielding layer made of a non-lead sheet type rubber sheet containing an inorganic powder having a high specific gravity is present between a front clothing material and a back clothing material made of a fiber cloth having an organic polymer layer. Is currently widely used in radiation hospitals and nuclear power plants. Since radiation protection clothing requires a radiation shielding layer with a high specific gravity, it is unavoidable that the radiation protection clothing generally has a higher weight than ordinary work clothing, but commercially available radiation protection clothing has a radiation shielding layer. In addition to the above-mentioned two pieces of the front garment and the back garment, the weight is further increased. For this reason, users, such as doctors and X-ray technologists, have demanded a desire to reduce the weight as much as possible.

In order to meet this desire, the present inventors first conducted a detailed study of commercially available radiation protective clothing, and found that those used as front and back clothing are extremely cheap, probably because of cost reduction, or torn. It was an easy-to-use fiber cloth with a relatively thick organic polymer layer attached. The reason for adopting a thick organic polymer layer is that the fiber cloth is mechanically weak, and local tears caused by a slight scratching force may propagate to adjacent parts and lose its function as a reinforcing layer. Considering this, the organic polymer layer should have a certain level of mechanical strength so that even if such a situation occurs, the clothes will not break and develop. However, due to the above-mentioned reasons, the weight of the front garment and the back garment itself becomes large due to the adoption of the thick organic polymer layer, which in turn contributes to the high weight of the radiation protection garment.

Problems to be Solved In view of the actual situation in the above-mentioned commercially available radiation protection suits, problems to be solved in the present invention include flexibility of a lead-free sheet type rubber sheet containing a high specific gravity inorganic powder. In order to improve the comfort of the radiation protection garment using the excellent radiation shielding layer, the clothing on the front and back is improved to make the protective garment lightweight and thin without impairing the flexibility of the shielding layer.

Means for Solving Problems As a means for solving the above problems, the present invention is
It has a structure in which a radiation shielding layer is present between the front garment and the back garment, and the front garment and the back garment have a thickness of 100 to 400.
The radiation-shielding layer comprises a micrometer organic polymer layer reinforced with a fiber cloth having a basis weight of 10 to 100 g / m ² and having a connection structure between fibers in which localized breakage is difficult to propagate to adjacent parts. Is a non-lead sheet type rubber sheet containing a high specific gravity inorganic powder, and is in a state of being separated from the front clothing material and the back clothing material.

Effect of the Invention In the present invention, as a fiber cloth for both front and back cloths, the basis weight is extremely light as 10 to 100 g / m ² and yet local tears propagate to adjacent parts. A material having a difficult connection structure between fibers is used. For this reason, even if the fiber cloth is locally torn for some reason, the tear remains only in that part and is difficult to propagate to the adjacent part, so that the fiber cloth as a whole still retains its function as a reinforcing layer. To do. Therefore, the organic polymer layer reinforced by such a fiber cloth can be made significantly thinner than that of a conventional product, and as a result, the weight of the cloth itself used can be reduced.
As a result, the weight of the radiation protection suit can be reduced. Further, the clothing portion can be made thin, and the radiation shielding layer made of a rubber composition containing a non-lead sheet type rubber sheet, that is, a rubber composition containing a high specific gravity inorganic powder without using a lead sheet, is a disadvantage of thickening protective clothing. While covering as a whole, it is possible to take advantage of its advantage of flexibility, and the radiation shielding layer is separated from the front and back clothes to help with the freedom of deformation, so that a feeling of wearing or wearing work It can be a protective suit that excels in activity over time.

DETAILED DESCRIPTION OF THE INVENTION FIG. 1 shows an example of a partial cross-sectional view of the protective garment of the present invention, in which 1 is a front cloth material having a front side organic polymer layer 11 and a back side organic polymer layer 13 on both sides of a fiber cloth 12, 2 Is a backing cloth made of a fiber cloth 22 having an organic polymer layer 21, 3 is a radiation shielding layer, and the edge 4 is an organic polymer layer 21 of the backing cloth and an inner organic polymer layer of the front cloth as shown in the figure. It is sealed by fusion with 13.

Therefore, the radiation shielding layer 3 is in a state of being separated from the front and back clothes 1, 2 so that the radiation shielding layer can be freely deformed without being restrained by the front and back clothes, and the feeling of wearing or the activity during wearing work can be improved. Can be improved. Both of them are those which are extremely lightweight in terms of basis weight of 10 to 100 g / m ² and have a connection structure between fibers in which local breakage is difficult to propagate to adjacent parts. If the basis weight is less than 10 g / m ² , it is too thin to function as a reinforcing layer, while the basis weight is 100 g.
If it is larger than / m ^{2, the} weight of the radiation protective suit is not suitable for the purpose of reducing the weight due to its own high weight. Therefore, the basis weight is preferably 15 to 85 g / m ² , and particularly preferably ^{20 to} 70 g / m ² .
The fibers forming the fiber cloth may be synthetic fibers or natural fibers of any type, but those having a high tensile strength of at least 5 kg / 30 mm, particularly at least 10 kg / 30 mm are preferred. . In particular, polyester fiber cloth, nylon fiber cloth, aromatic polyamide fiber cloth and the like satisfying the above strength are preferable.

As a fiber cloth having a connection structure between fibers in which a local tear is difficult to propagate to adjacent parts, for example, a knitted cloth in which fibers are highly entangled such as tricot knitting, particularly a weft insertion tricot knitting cloth, and warp and weft Examples of such a material are those in which fibers are fused and bonded at each entanglement point or bonded by an adhesive.

The constituent materials of the organic polymer layers 11 and 13 of the front garment and the back garment are not particularly limited and may be those conventionally used in this field. Examples thereof include thermoplastic organic polymers such as polyvinyl chloride, ethylene-acetic acid vinyl copolymer, polyolefin, polyurethane, polyester and nylon. When a fiber cloth having a connection structure between fibers in which the above local breakage is difficult to propagate to adjacent parts is used, the thickness of the organic polymer layer can be a thin layer of 400 μm or less. Preferably 100-350μ
m, particularly about 100 to 300 μm.

Also as the radiation shielding layer 3, a high specific gravity inorganic powder, for example, a rubber sheet made of a composition of lead oxide and rubber, that is, a lead-free sheet type having excellent flexibility is used.

Effect of the Invention In the radiation protective clothing of the present invention, as a fiber cloth for both front clothing and back clothing, a connection structure between fibers that is extremely lightweight and yet is difficult for local tear to propagate to adjacent portions. Use the one with. For this reason, for the reason described above, the organic polymer layer reinforced by such a fiber cloth can be made significantly thinner than the conventional product,
As a result, it is possible to reduce the weight of the clothing material itself used, and thus the weight of the radiation protection clothing.

In addition, since the clothing material used itself becomes thin and the flexibility thereof increases, there is an advantage that the radiation protection clothing is supple and therefore comfortable to wear.

Therefore, according to the present invention, based on the bag type packaging of the radiation shielding layer which is excellent in flexibility due to the light and thin front and back clothes, it is light and has excellent flexibility, so that the wearing feeling or the activity during wearing work can be improved. An excellent radiation protection suit can be obtained.

[Brief description of drawings]

 FIG. 1 shows an example of a partial sectional view of the protective clothing of the present invention. 1 …… Outer fabric 11,13 …… Organic polymer layer 12 …… Fiber cloth 2 …… Backing fabric 21 …… Organic polymer layer 22 …… Fiber cloth 3 …… Radiation shielding layer 4 …… Edge

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 61-258197 (JP, A) JP 62-12898 (JP, A) JP 62-280698 (JP, A) JP 62- 121046 (JP, A) JP-A-54-12946 (JP, A)

Claims (2)

[Claims] 1. A structure having a radiation-shielding layer between a front garment and a back garment, wherein the front garment and the back garment have an organic polymer layer having a thickness of 100 to 400 μm locally. A basis weight of 10 to 10 that has a connection structure between fibers in which breakage does not easily propagate to adjacent parts.
In addition to being reinforced with a fiber cloth of 0 g / m ² , the radiation shielding layer is made of a non-lead sheet type rubber sheet containing a high specific gravity inorganic powder, and is separated from the front cloth and the back cloth. Radiation protective clothing characterized by being present. 2. The radiation protective clothing according to claim 1, wherein the fiber cloth is tricot knitted.