Medical polymer radiation shielding plate

Abstract

The utility model discloses a medical polymer radiation shielding plate which comprises a plurality of shielding layers which are arranged in a stacked mode, and each shielding layer comprises a shielding substrate and a connecting layer. The plurality of shielding substrates are transversely arranged, and an arrangement gap is formed between any two adjacent shielding substrates; the connecting layer is arranged in the arrangement gap and extends outwards to wrap the surface of the shielding substrate. According to the medical polymer radiation shielding substrate provided by the utility model, the plurality of shielding substrates are wrapped by the connecting layers to form the shielding layer, so that the shielding layer has extremely high shielding performance and relatively strong mechanical property, and radiation is prevented from being transmitted from the connecting layers of the adjacent shielding substrates by laminating the plurality of shielding layers.

Description

Technical Field

[0001] The utility model relates to the technical field of radiation shielding, in particular to a medical polymer radiation shielding plate. Background Art

[0002] With increasingly stringent requirements for lightweight and lead-free radiation shielding panels, polymer-based shielding materials are gaining increasing attention. Current mainstream medical radiation shielding panels are made of resin shielding materials mixed with nanofillers such as barium sulfate, samarium oxide, or bismuth oxide. These materials exhibit high radiation absorption properties, reaching peak performance when the nanofiller content reaches approximately 70%.

[0003] As for the mechanical properties of the material, when the content of nanofiller is about 30%, the mechanical properties of the material are optimal. When the filler is added excessively and the content reaches about 40%, a large number of filler agglomerates and voids will form inside the material, which will destroy the resin cross-linking network, and the tensile strength and flexural strength of the composite material will drop sharply.

[0004] Therefore, this type of resin shielding material has the defect of insufficient mechanical properties, which makes it difficult to apply resin shielding materials with a high content of nanofillers to radiation shielding plates with high mechanical property requirements. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a medical polymer radiation shielding plate, the specific technical solution is as follows:

[0006] A medical polymer radiation shielding plate comprises a plurality of shielding layers stacked together, wherein the shielding layers include:

[0007] There are multiple shielding substrates, which are arranged in a transverse direction, with a gap formed between any two adjacent shielding substrates;

[0008] The connecting layer is arranged in the arrangement gap and extends outward to cover the surface of the shielding substrate.

[0009] Preferably, the shielding substrates of two adjacent shielding layers are arranged in a staggered manner.

[0010] Preferably, both sides of the shielding substrate are inwardly cut to form beveled surfaces, and the two beveled surfaces are parallel to each other.

[0011] Preferably, the adjacent oblique cut surfaces of any two adjacent shielding substrates in each shielding layer are parallel.

[0012] Preferably, notches are provided on both sides of the shielding substrate, and any two adjacent notches of any two adjacent shielding substrates of each shielding layer fit together.

[0013] Preferably, the notch portion includes openings respectively provided at two opposite edges of the shielding substrate, and the two openings have the same width along the lateral direction of the shielding substrate and different depths along the thickness direction of the shielding substrate.

[0014] Preferably, the thickness of the bonding layer is between one fifth and one third of the thickness of the shielding substrate.

[0015] Preferably, the shielding substrate and the connecting layer are made of resin matrix materials.

[0016] The medical polymer radiation shielding substrate provided by the present invention uses a resin plate containing about 70% samarium oxide and bismuth oxide as a shielding substrate, and a resin plate containing about 30% barium sulfate as a connecting layer, and multiple shielding substrates are coated with the connecting layer to form a shielding layer, so that the shielding layer has both extremely high shielding performance and strong mechanical properties. By stacking multiple shielding layers, radiation is prevented from penetrating the connecting layer between adjacent shielding substrates, thereby solving the technical problems in the background technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A side view of a medical polymer radiation shielding plate provided in an embodiment of the present utility model;

[0019] Figure 2 A side view of a medical polymer radiation shielding plate provided in Example 1 of the embodiment of the present utility model;

[0020] Figure 3 This is a side view of the shielding layer provided in Example 2 of the embodiment of the present invention.

[0021] Reference numerals

[0022] 10-shielding layer;

[0023] 1-shielding substrate; 11-beveled surface; 12-arrangement gap; 13-notch portion;

[0024] 2-Connection layer. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in the subsequent drawings.

[0027] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate and simplify the description of the utility model and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first" and "second," etc., are used solely for distinction and description and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0029] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] See Figures 1 to 3 This embodiment provides a medical polymer radiation shielding plate, including a plurality of shielding layers 10 stacked and arranged, wherein the shielding layer 10 includes a shielding substrate 1 and a connecting layer 2.

[0031] There are multiple shielding substrates 1 , which are arranged in a transverse arrangement, with an arrangement gap 12 formed between any two adjacent shielding substrates 1 .

[0032] The connecting layer 2 is disposed in the arrangement gap 12 and extends outward to cover the surface of the shielding substrate 1 .

[0033] The shielding substrate 1 may be a resin matrix containing a mixture of samarium oxide and bismuth oxide in a content of 65% to 75%; the bonding layer 2 may be a resin matrix containing a mixture of barium sulfate in a content of 27% to 33%.

[0034] Among them, a resin plate containing approximately 30% barium sulfate has extremely high mechanical properties, while a resin plate containing approximately 70% samarium oxide and bismuth oxide has higher radiation shielding performance than the barium sulfate plate. Therefore, a resin plate containing approximately 70% samarium oxide and bismuth oxide is used as the shielding substrate 1, and a resin plate containing approximately 30% barium sulfate is used as the bonding layer 2. Multiple shielding substrates 1 are coated with the bonding layer 2 to form a shielding layer 10. This allows the shielding layer 10 to have both extremely high shielding performance and strong mechanical properties. The stacking of multiple shielding layers 10 can prevent radiation from penetrating the bonding layers 2 between adjacent shielding substrates 1. The bonding layer 2 can also include a coupling agent, which can combine with the resin in the shielding substrate 1 to enhance the bond between the materials.

[0035] The medical polymer radiation shielding substrate provided in this embodiment wraps multiple shielding substrates 1 with a connecting layer 2 to form a shielding layer 10, so that the shielding layer 10 has both extremely high shielding performance and strong mechanical properties. By stacking the multiple shielding layers 10, radiation is prevented from penetrating through the connecting layer 2 between adjacent shielding substrates 1, thereby solving the technical problems in the background technology.

[0036] Furthermore, the shielding substrates 1 of two adjacent shielding layers 10 are arranged in a staggered manner.

[0037] Specifically, the shielding substrate 1 of each shielding plate 10 can cover the gap between adjacent shielding substrates 1 , thereby preventing radiation from passing through the gap between the shielding substrates 1 .

[0038] Further, see Figure 2 In Example 1 of this embodiment, both sides of the shielding substrate 1 are cut inwardly to form beveled surfaces 11, and the two beveled surfaces 11 are parallel. When multiple shielding substrates 1 are assembled to form the shielding layer 10, the beveled surfaces 11 of adjacent shielding substrates 1 are parallel to each other, ensuring that radiation can be blocked by the shielding substrates 1 regardless of where it enters the shielding layer 10.

[0039] Furthermore, in each shielding layer 10 , adjacent beveled surfaces 11 of any two adjacent shielding substrates 1 are parallel.

[0040] Further, see Figure 3In Example 2 provided in this embodiment, notches 13 are provided on both sides of the shielding substrate 1, and the adjacent notches 13 of any two adjacent shielding substrates 1 of each shielding layer 10 fit together. Specifically, the notch 13 on one side of the shielding substrate 1 can fit together with the notch 13 on the other side of the adjacent shielding substrate 13.

[0041] Furthermore, the notch portion 13 includes openings provided on two opposing edges of the shielding substrate 1, the two openings having the same width along the transverse direction of the shielding substrate 1 and different depths along the thickness direction of the shielding substrate 1. Specifically, the shielding substrate 1 as a whole can be a rectangular parallelepiped, with the two farthest edges of the rectangular parallelepiped being the opposing edges of the shielding substrate 1. The openings on both sides of the shielding substrate 1 have the same width along the transverse direction of the shielding substrate 1, facilitating the combination of the two shielding substrates 1 when spliced ​​together. The openings on both sides of the shielding substrate 1 have different depths along the thickness direction of the shielding substrate 1, resulting in different depths of the arrangement gap 12 when the two shielding substrates 1 are combined. This can better prevent radiation from passing through the arrangement gap 12 when the multiple shielding layers 10 are attached.

[0042] Furthermore, the thickness of the connecting layer 2 is between one fifth and one third of the thickness of the shielding substrate 1 , so as to ensure that the shielding layer 10 has strong mechanical properties while also preventing radiation from passing through the gap between the two shielding plates 1 as much as possible.

[0043] Furthermore, the shielding substrate 1 and the bonding layer 2 are made of resin matrix materials.

[0044] One specific embodiment and two comparative examples are provided below. The provided embodiments and comparative examples may enable those skilled in the art to more fully understand the present invention, but are not intended to limit the present invention in any way.

[0045] Example 1: A medical polymer radiation shielding plate with a thickness of 12 mm.

[0046] 427.5 parts of nano-samarium oxide and 12.5 parts of nano-bismuth oxide were added to 100 parts of epoxy resin, where the particle size of the nano-samarium oxide and nano-bismuth oxide was 100-200 nm. The mixture was stirred and dispersed at room temperature for 30 minutes. Two parts of dimethyl silicone oil defoamer and 1.5 parts of cobalt isooctanoate accelerator were then added, stirred for 2 minutes. 85 parts of methyl ethyl ketone peroxide curing agent were then added, stirred for 2 minutes, and vacuum degassed. Finally, the mixture was poured into a mold sprayed with a release agent and cured at room temperature for 12 hours to obtain a shielding substrate 1.

[0047] 100 parts of PVC resin powder were put into a high-speed mixer and operated at low speed. When the temperature reached 60°C, 0.5 parts of zinc stearate, 2 parts of calcium stearate, 8 parts of CPE and 1 part of ACR were added. After 1.5 minutes, the speed was increased to high speed. When the friction heat reached 80°C, 45 parts of barium sulfate powder, 2.5 parts of KH560 silane coupling agent and 2 parts of SP-1800 dispersant were added. When the temperature rose to 100°C, 0.5 parts of PE wax were added. When the temperature reached 120°C, the mixing speed was switched from high speed to low speed. After vacuuming for 3 minutes, a barium sulfate-PVC resin mixture was obtained.

[0048] Pour a layer of barium sulfate-PVC resin mixture into the mold. After solidification, lay 50 shielding substrates 1 in the mold. Continue to pour the barium sulfate-PVC resin mixture to cover the shielding substrate 1. After solidification, continue to pour the barium sulfate-PVC resin mixture. Let it stand and solidify. Lay the shielding substrate 1 on the surface of the solidified material and stagger it with the shielding substrate 1 on the bottom layer. After laying, continue to pour the barium sulfate-PVC resin mixture. After standing and solidifying, obtain a shielding plate with a double shielding layer 10 bonded together.

[0049] Comparative Example 1: a conventional resin shielding plate with a thickness of 12 mm and a barium sulfate content of 60%.

[0050] Preparation method: 100 parts of PVC resin powder are put into a high-speed mixer and run at low speed. When the temperature reaches 60°C, 0.5 parts of zinc stearate, 2 parts of calcium stearate, 8 parts of CPE and 1 part of ACR are added. After 1.5 minutes, the speed is increased to high speed. When the friction heat reaches 80°C, 175 parts of barium sulfate powder, 2.5 parts of KH560 silane coupling agent and 2 parts of SP-1800 dispersant are added. When the temperature rises to 100°C, 0.5 parts of PE wax are added. When the temperature reaches 120°C, the mixing speed is switched from high speed to low speed, and vacuum is applied for 3 minutes to obtain the product.

[0051] Comparative Example 2: a conventional resin shielding plate with a thickness of 12 mm, wherein the content of nano-samarium oxide is 60%.

[0052] The only difference between this comparative example and comparative example 6 is that the composition and weight parts of the traditional resin shielding plate are: 100 parts of PVC resin powder, 0.5 parts of zinc stearate, 2 parts of calcium stearate, 8 parts of CPE, 1 part of ACR, 175 parts of nano-samarium oxide, 2.5 parts of KH560 silane coupling agent, 2 parts of SP-1800 dispersant, and 0.5 parts of PE wax.

[0053] The protection data of the medical polymer radiation shielding plate prepared in the above embodiment measured at a tube voltage of 120 kV are shown in Table 1:

[0054] Table 1

[0055]

[0056] The flexural strength data of the medical polymer radiation shielding plate prepared in the above embodiment are shown in Table 2:

[0057] Table 2

[0058]

[0059] The above data show that:

[0060] 1. The medical polymer radiation shielding plate provided in this embodiment has improved protection performance compared to traditional resin shielding plates.

[0061] 2. The medical polymer radiation shielding plate provided in this embodiment has greatly improved anti-bending performance compared to traditional resin shielding plates.

[0062] Working principle:

[0063] The resin plate containing about 30% barium sulfate has extremely high mechanical properties, and the resin plate containing about 70% samarium oxide and bismuth oxide has higher radiation shielding performance than the barium sulfate plate. Therefore, the resin plate containing about 70% samarium oxide and bismuth oxide is used as the shielding substrate 1, and the resin plate containing about 30% barium sulfate is used as the connecting layer 2. Multiple shielding substrates 1 are coated with the connecting layer 2 to form a shielding layer 10, so that the shielding layer 10 has both extremely high shielding performance and strong mechanical properties. The multiple shielding layers 10 are stacked to prevent radiation from penetrating from the connecting layer 2 in adjacent shielding substrates 1.

[0064] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0065] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of the present utility model.

Claims

1. A medical polymer radiation shielding plate, characterized in that: The invention comprises a plurality of shielding layers (10) arranged in a stacked manner, wherein the shielding layer (10) comprises: There are multiple shielding substrates (1), the multiple shielding substrates (1) are arranged in a transverse arrangement, an arrangement gap (12) is formed between any two adjacent shielding substrates (1), and the shielding substrates (1) of two adjacent shielding layers (10) are arranged in a staggered manner; A connecting layer (2) is provided in the arrangement gap (12) and extends outward to cover the surface of the shielding substrate (1); Wherein, both sides of the shielding substrate (1) are inwardly cut to form beveled surfaces (11), and the two beveled surfaces (11) are parallel, and the beveled surfaces (11) adjacent to any two adjacent shielding substrates (1) in each shielding layer (10) are parallel; or notches (13) are provided on both sides of the shielding substrate (1), and the two adjacent notches (13) of any two adjacent shielding substrates (1) in each shielding layer (10) fit together.

2. The medical polymer radiation shielding plate according to claim 1, characterized in that: The notch portion (13) comprises openings respectively arranged at two opposite edges of the shielding substrate (1); the two openings have the same transverse width along the shielding substrate (1) and different depths along the thickness direction of the shielding substrate (1).

3. The medical polymer radiation shielding plate according to claim 1 or 2, characterized in that: The thickness of the connecting layer (2) is between one fifth and one third of the thickness of the shielding substrate (1).

4. The medical polymer radiation shielding plate according to claim 1 or 2, characterized in that: The shielding substrate (1) and the connecting layer (2) are made of resin matrix materials.

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