CN1287387C - Radioactive ray screen and method for preparation of the same - Google Patents
Radioactive ray screen and method for preparation of the same Download PDFInfo
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- CN1287387C CN1287387C CN 02154389 CN02154389A CN1287387C CN 1287387 C CN1287387 C CN 1287387C CN 02154389 CN02154389 CN 02154389 CN 02154389 A CN02154389 A CN 02154389A CN 1287387 C CN1287387 C CN 1287387C
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Abstract
The present invention relates to a radioactive ray screen and a preparation method thereof. Metal powder (12), (13) and (14) of W, Sb and Sn are mixed and dispersed in chloroethylene resin (11). On the premise that Pb is not added, the screening performance of radioactive rays is ensured by the radioactive ray screen. Simultaneously, the radioactive ray screen has the advantages of tensile strength, divulsive strength, folding resistance and flame retardance performance, and also prevents pinholes form being penetrated.
Description
Technical field
The present invention relates to the manufacture method of radioactive ray screen and this radioactive ray screen, relate in more detail and be used for configuration example such as X-ray generator, the atomic energy correlation machine, bomb, the structural elements of radioactive waste container etc. or in order to prevent to operate the X ray technician of X-ray generator, the doctor, the researcher, nondestructive inspection person, accept the patient of radiodiagnosis or radiation cure, handle the worker of radiation material or radioactive ray discarded object, the radioactive ray screen that responsible official of atomic energy correlation machine etc. is used by radiation exposure and the manufacture method of this radioactive ray screen.
In addition, the radioactive ray screen be comprise film like thin objects with flexibility, thickness greater than the object of film, have the notions such as plate object of rigidity.
Background technology
Fig. 4 is the sectional view of radioactive ray shielded film pattern of expression described kind in the past, thermoplastic resin such as 91 expression vestolits among the figure.Thermoplastic resin 91 forms thickness t and is about film about 0.5mm usually, mixes in thermoplastic resin 91 and is dispersed with lead (below, be designated as Pb) powder 92.Constitute radioactive ray shielded film 90 by above-mentioned thermoplastic resin 91, Pb powder 92 etc.
Though not shown, described radioactive ray shielded film 90 is after blocking into certain size, wrap with cloth etc., become definite shape by this cloth seaming then, dress after forming the protective clothing of jacket, western-style clothes trousers, apron, overcoat, cap, gloves etc.Or with it as cover, curtain and be adjacent to along radiation source, perhaps cover radiation source indirectly and use.
Though not shown, in X-ray generator, atomic energy correlation machine, bomb, the radioactive waste container etc., use as structure member and in thermosetting resin sheet, to mix and to disperse radioactive ray screen behind the Pb powder.
In above radioactive ray shielded film 90 or radioactive ray screen in the past, be mixed with Pb powder 92 or zinc lead alloy, Pb takes place in each operation such as manufacturing, use, waste disposal easily to poison or the Pb public hazards.In addition, because the thin thickness of radioactive ray shielded film 90 or radioactive ray screen so the pin hole that certainly leads in the manufacture process (not shown) runs through the radioactive ray screen easily, has the danger that sees through radioactive ray by above-mentioned pin hole.
Summary of the invention
The present invention finishes in view of above-mentioned problem, its purpose is to provide the shielding properties of guaranteeing radioactive ray under a kind of prerequisite that does not add Pb, have both pulling strengrth, tearing strength, folding resistance and anti-flammability simultaneously, also stop the radioactive ray screen and the manufacture method thereof that run through of pin hole.
In order to achieve the above object, radioactive ray screen 1 of the present invention is characterised in that, is mixed with at least a in the metal monomer powders of antimony (below, be designated as Sb), tin (below, be designated as Sn), bismuth (below, be designated as Bi) or the compound powder in resin.
According to above-mentioned radioactive ray screen 1, because the metal monomer powders of above-mentioned Sb, Sn, Bi or compound powder all shield radioactive ray easily,, also can shield radioactive ray so needn't mix Pb, can prevent that Pb poisons or the Pb public hazards simultaneously.And, can improve anti-flammability by Sb.
In addition, 2 of radioactive ray screen of the present invention is characterised in that, in above-mentioned radioactive ray screen 1, also is mixed with the compound powder of the metal monomer powders of tungsten (below, be designated as W) or compound powder and/or barium (below, be designated as Ba).
According to above-mentioned radioactive ray screen 2, the existence of the metal monomer powders by above-mentioned W or the compound powder of compound powder and/or barium, can improve the shielding of radioactive ray, simultaneously because the price of above-mentioned metal monomer powders or compound powder is lower, so can suppress the rising of manufacturing expense.
In addition, 3 of radioactive ray screen of the present invention is characterised in that in above-mentioned radioactive ray screen 2, the blending ratio of above-mentioned powder is that W is with WO
3Form is that 0～90 weight portion, Sb are with Sb
2O
3Form is that 0～90 weight portion and Sn are 0～90 weight portion.
According to above-mentioned radioactive ray screen 3,,, can guarantee intensity simultaneously as film so shield radioactive ray reliably because in above-mentioned resin, be mixed with above-mentioned W, Sb, Sn powder in right amount.
In addition, 4 of radioactive ray screen of the present invention is in above-mentioned radioactive ray screen 1～3 any one, it is characterized in that above-mentioned resin is to be made of in thermoplastic vinylite, polyurethane resin, the polyethylene-based resin any one.
According to above-mentioned radioactive ray screen 4, because above-mentioned resin is to be made of in thermoplastic vinylite, polyurethane, the polyethylene-based resin any one, so plasticity of keeping, guarantee simultaneously intensity fully, can be applicable to that radioactive ray shield the protective clothing of usefulness, cover, curtain etc. as film.
In addition, 5 of radioactive ray screen of the present invention is, in any one in above-mentioned radioactive ray screen 1～3, it is characterized in that above-mentioned resin is is that resin, phenolic aldehyde are that in resin, the silicone-based resin any one constitutes by heat cured epoxy.
According to above-mentioned radioactive ray screen 5,,, can be applicable in the structure member etc. of radioactive ray shielding usefulness so can fully guarantee intensity because above-mentioned resin is to be that resin, phenolic aldehyde are that in resin, the silicone-based resin any one constitutes by heat cured epoxy.
In addition, 6 of radioactive ray screen of the present invention is, in any one in above-mentioned radioactive ray screen 1～5, it is characterized in that a plurality of film like radioactive ray screens are stacked and constitutes.
According to above-mentioned radioactive ray screen 6, be laminated by any one many in the above-mentioned radioactive ray screen 1～5 because be, so damaged the pin hole that in above-mentioned radioactive ray screen 1～5, is easy to generate by pressure, significantly reduced simultaneously and interconnect between the above-mentioned pin hole and run through the problem of above-mentioned screen 1～5 inside.Its result stops radioactive ray to see through by above-mentioned pin hole, can stop seeing through of radioactive ray reliably.
In addition, the manufacture method of radioactive ray screen of the present invention is the manufacture method of above-mentioned radioactive ray screen 6, it is characterized in that, hybrid metal monomer powders and/or compound powder in resin raw material, utilize extrusion forming method, calendering processing, cladding process or die forming method etc. to produce after the film like radioactive ray screen, many above-mentioned radioactive ray screens are stacked, carry out stacked processing.
By adopting above-mentioned extrusion forming method, calendering processing, cladding process or die forming method, can easily produce the radioactive ray screen of above-mentioned film like, and by above-mentioned stacked processing, can remove the pin hole that in above-mentioned film like radioactive ray screen, is produced in the limit, the limit is carried out stacked, in the screen of lamination, can stop reliably running through of pin hole, thereby produce the radioactive ray screen of excellent radioactive ray screening ability.
Description of drawings
Fig. 1 is the sectional view of embodiment 1 pattern of expression radioactive ray screen of the present invention.
Fig. 2 is the sectional view of the radioactive ray screen pattern of expression embodiment 2.
Fig. 3 is the sectional view of manufacture method pattern that is used to illustrate the radioactive ray screen of embodiment 2.
Fig. 4 is a sectional view of representing radioactive ray shielded film pattern in the past.
Embodiment
Below, with reference to the manufacture method of description of drawings radioactive ray screen of the present invention and this radioactive ray screen.In addition, function has identical symbol with routine identical structure member in the past.
Fig. 1 is the pattern sectional view as the radioactive ray shielded film of the radioactive ray screen of the embodiment of the invention 1.11 expression vestolits among the figure.Vestolit 11 forms the film that thickness t is about 0.5mm, W is arranged with WO in vestolit 11
3Form, Sb are with Sb
2O
33 kinds of metal powders 12～14 that form and Sn mix and disperse with the Sn form.
WO
3, Sb
2O
3, Sn powder 12～14 desirable blending ratio be WO
3Powder 12 is 0～90 part, Sb
2O
3Powder 13 is that 0～90 weight portion, Sn powder 14 are 0～90 part.If blending ratio is greater than above-mentioned value, then the blending ratio relative deficiency of vestolit 11 is abundant inadequately as pulling strengrth, tearing strength, the folding resistance of film.By above-mentioned vestolit 11, WO
3, Sb
2O
3, 3 kinds of metal powders 12,13,14 such as Sn etc. constitute radioactive ray screened film 10.
When manufacturing has the radioactive ray screened film 10 of said structure, at first use mixer, a certain amount of vestolit raw material, metal powder, plastifier, bonding composition are mixed.Then, utilize extruding formation method, calendering processing method, cladding process or die forming method etc. that said mixture is shaped, produce the radioactive ray shielded film 10 that thickness t is about 0.5mm.
WO
3, Sb
2O
3, Sn powder 12～14 all shields radioactive ray easily, also can shield radioactive ray under the situation of not mixing Pb, and can prevent that Pb poisons or the generation of Pb public hazards.
The radioactive ray shielded film 10 in addition, because be mixed with enough WO in vestolit 11
3, Sb
2O
3, Sn powder 12～14, so can shield radioactive ray reliably.
In addition, because in vestolit 11, mixed an amount of WO
3, Sb
2O
3, Sn powder 12～14, so can keep plastic guarantee simultaneously sufficient pulling strengrth, tearing strength, folding resistance.And, pass through Sb
2O
3The existence of powder 13 can be guaranteed the anti-flammability as film fully.And, because WO
3, Sb
2O
3, Sn powder 12～14 price lower, so can suppress the rising of manufacturing expense.
Fig. 2 is the sectional view of the radioactive ray screen pattern of expression embodiment 2.20a represents the radioactive ray shielded film among the figure.When being t as the whole film thickness of product, it is the film of t/2 that radioactive ray shielded film 20a forms thickness.Described radioactive ray shielded film 20a is identical with described radioactive ray shielded film 10, mixes in vestolit 21a and is dispersed with WO
3, Sb
2O
3And 3 kinds of metal powder 22a～24a such as Sn.Constitute radioactive ray shielded film 20 behind above-mentioned 2 radioactive ray shielded film 20a, the 20a lamination.
When manufacturing has the radioactive ray shielded film 20 of said structure, identical with radioactive ray shielded film 10 shown in Figure 1, at first produce radioactive ray shielded film 20a, 20a that thickness is about t/2.
Use the press working machine shown in Fig. 3 then, stacked radioactive ray shielded film 20a, 20a and integrated.31 expression pedestals among the figure.Be provided with drive ram 32 above pedestal 31, it can the A-B direction in figure drive.Constitute press working machine main body 30a by above-mentioned pedestal 31, drive ram 32.In addition, between pedestal 31 and drive ram 32, install and be provided with the approximate tabular substrate 33～35 of square, heating arrangements (not shown) is installed on substrate 33～35.Stacked many group radioactive ray shielded film 20a, 20a between substrate 33～35, and each radioactive ray shielded film 20a, 20a are by the separating plate 36a of stainless steel, 36a clamping.By aforesaid substrate 33～35, separating plate 36a constitutes anchor clamps 30b.
When using above-mentioned press working machine and radioactive ray shielded film 20a, 20a to make radioactive ray shielded film 20, at first at pedestal 31 tops and drive ram 32 bottom installation base plates 33,34.Then, pile up the film 20a, the 20a that are held among separating plate 36a, the 36a,, continue to pile up film 20a, the 20a that is held among separating plate 36a, the 36a then at institute's allocation placement substrate 35.Start heating arrangements afterwards, by substrate 33～35, separating plate 36a, 36a are warming up to certain temperature with film 20a, 20a, and then the arrow B direction in figure drives drive ram 32, applies certain pressure and carries out thermo-compressed to film 20a, 20a.Afterwards, by cooling, radioactive ray shielded film 20a, 20a become one, and producing thickness is the radioactive ray shielded film 20 of t.
The radioactive ray shielded film 20 of embodiment 2 is because be laminated by radioactive ray shielded film 20a, 20a, runs through the phenomenon of radioactive ray shielded film 20 inside so significantly reduce connection between the pin hole.In addition, can crush in stacked operation and remove incidental pin hole in the manufacturing process of radioactive ray shielded film 20a, its result stops by pin hole to see through radioactive ray, can further shield radioactive ray reliably.
In addition, in the radioactive ray shielded film 20 and manufacture method thereof of embodiment 2, explanation be with 2 radioactive ray shielded film 20a, situation when 20a is stacked, but be not limited to 2, can use in other embodiments 3,4 ...The number of lamination is many more, can reduce the perforation of the film that is caused by pin hole more, but on making some difficulties is arranged.
In addition, what illustrate in the manufacture method of the radioactive ray shielded film 20 of embodiment 2 is, as stacked processing and implementation the situation of pressure processing, but can implement to contain the roll rolling process of heating process in other embodiments or use the bonding processing of bonding agent.
In addition, in the radioactive ray shielded film 10,20 of embodiment 1,2 explanation all be to use WO
3Powder 12, Sb
2O
3Powder 13, Sn powder 14, WO
3Powder 22a, Sb
2O
3Sb can be mixed and be dispersed with to situation when powder 23a, Sn powder 24a in other embodiments
2O
3Powder, Sn powder, Bi powder, BiO
3In the powder any one.Or mix and be dispersed with WO
3Powder and Sb
2O
3Powder, WO
3Powder and Sn powder, WO
3Powder and Bi powder, WO
3Powder and BiO
3Powder, Sb
2O
3Powder and Sn powder, barium sulphate powder and Bi powder, barium sulphate powder and BiO
3Any 2 kinds of metal powders such as powder.
What illustrate in the radioactive ray shielded film 10,20 of embodiment 1,2 in addition, is to use W with WO
3Form, Sb are with Sb
2O
3The metal powder 12～14 that form and Sn exist with the Sn form, the situation of 22a～24a can directly be used compound powders such as W, Sb metal monomer powders, Sn oxide or carbonide separately, alloy in other embodiments.
In addition, all being that situation when using thermoplasticity vestolit 11,21a as resin is illustrated in the radioactive ray of embodiment 1, the 2 shielding thin plate 10,20, is resin, polyethylene-based resin etc. and can use other vinylite (for example vinyl acetate is a resin) or polyurethane in other embodiments.In this case, according to employed resin, need to change plastifier, bonding composition.
In addition, all be the situation when using thermoplasticity vestolit 11,21a in the radioactive ray of embodiment 1, the 2 shieldings thin plate 10,20, and can use heat cured epoxy resin, phenolics, silicone-based resin etc. in other embodiments as resin.In this case, according to employed resin, use after needing to change catalyst component.
Embodiment and comparative example
Make the radioactive ray screen of embodiment and comparative example under the following conditions, and explanation is under the following conditions corresponding to lead equivalent, pulling strengrth, the tearing strength of 1mm thickness screen, the folding resistance of screen product thickness (0.5mm), the investigation result of pin hole production.
Use mixer, with the plastifier of resin, metal powder and the ormal weight shown in following table 1, table 2, the table 3, bonding become to grade mix, utilize extruding formation method, make after the film of specific thickness, with 2 above-mentioned film overlaies, carry out stacked processing with pressing machine.The content of vestolit is 90～10% in embodiment 1～36, Sb
2O
3, Sn, Bi or BiO
3Content be 10～90%.In embodiment 37 content of vestolit be 22%, WO
3Content be 13%, Sb
2O
3Content be 30%, Sn content is 35%.In addition, making the vestolit amount in comparative example 1,3,27,29 is 100%, and does not add Sb
2O
3, Sn, Bi or BiO
3, in comparative example 2,4,28,30, do not add vestolit, and make Sb
2O
3, Sn, Bi or BiO
3Content be 100%.With respect to 100～0% vestolit, mix 0～100% WO in the comparative example 5～26
3, BaSO
4Powder.The content of vestolit is 20% in comparative example 31, and Pb content is 80%, does not carry out lamination processing.Measure lead equivalent, pulling strengrth, tearing strength according to JIS-Z4801 (1991), folding resistance, according to 2 of JIS-Z4501, the generation situation of observation pin hole (film dimensions 25.4cm * 30.5cm).
The lead equivalent of in following table 1, table 2, having represented blending ratio, screen that every 1mm is thick.
Lead equivalent, pulling strengrth, the tearing strength of the every 1mm screen of expression in following table 3, thickness are that the folding resistance and the pin hole of the product of 0.5mm produces the Determination on condition result.
(1) from table 1, table 2, is clear that Sb
2O
3, Sn, Bi or BiO
3Content be that the lead equivalent of every 1mm thickness is more than the 0.03mmPb among 10～90% the embodiment 1～36, even do not mix Pb, by adjusting Sb
2O
3, Sn, Bi or BiO
3Combined amount, satisfy specification value (JISZ4831) 0.25mmPb of protective shield, protective jacket, thyroid gland safety appliance, protective gloves etc. probably.In addition, do not mix Sb
2O
3, Sn, Bi or BiO
3Comparative example 1,3,27,29 in, do not shield the ability of radioactive ray, and Sb
2O
3, Sn, Bi or BiO
3Content be 100%, do not have in the comparative example 2,4,28,30 of hybrid resin, though the shielding radioactive ray ability very high, can not be shaped.And Sb
2O
3, Sn, Bi or BiO
3Content be can not be shaped under the situation of 95% (resin is 5%).In addition, WO
3Content be that the lead equivalent of every 1mm is 0.02～0.17mmPb in 10～90% the comparative example 6～14.In addition, BaSO
4Content is that the lead equivalent of every 1mm is 0.01～0.16mmPb in 10～90% the comparative example 17～25.
(2) from table 3, be clear that and be mixed with WO
3, Sb
2O
3And the radioactive ray screen of the embodiment 37 of Sn seldom produces pin hole, can access the lead equivalent that is similar to the comparative example 31 that is mixed with Pb, can guarantee pulling strengrth, tearing strength and folding resistance simultaneously.
Table 1
| Comparative example 1 | Embodiment 1 | | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 | Embodiment 9 | Comparative example 2 | |
| Resin (%) | 100 | 90 | 80 | 70 | 60 | 50 | 40 | 30 | 20 | 10 | 0 |
| Sb 2O 3(％) | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
| Lead equivalent (mmPB) | 0 | 0.03 | 0.05 | 0.08 | 0.1 | 0.13 | 0.15 | 0.18 | 0.25 | 0.3 | - |
| Comparative example 3 | Embodiment 10 | Embodiment 11 | Embodiment 12 | Embodiment 13 | Embodiment 14 | Embodiment 15 | Embodiment 16 | Embodiment 17 | Embodiment 18 | Comparative example 4 | |
| Sn(％) | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
| Lead equivalent (mmPB) | 0 | 0.05 | 0.07 | 0.10 | 0.12 | 0.14 | 0.16 | 0.2 | 0.3 | 0.40 | - |
| Comparative example 5 | Comparative example 6 | Comparative example 7 | Comparative example 8 | Comparative example 9 | Comparative example 10 | Comparative example 11 | Comparative example 12 | Comparative example 13 | Comparative example 14 | Comparative example 15 | |
| WO 3(％) | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
| Lead equivalent (mmPB) | 0 | 0.02 | 0.04 | 0.07 | 0.08 | 0.09 | 0.1 | 0.137 | 0.15 | 0.17 | - |
Table 2
| Comparative example 16 | Comparative example 17 | Comparative example 18 | Comparative example 19 | Comparative example 20 | Comparative example 21 | Comparative example 22 | Comparative example 23 | Comparative example 24 | Comparative example 25 | Comparative example 26 | |
| Resin (%) | 100 | 90 | 80 | 70 | 60 | 50 | 40 | 30 | 20 | 10 | 0 |
| BaSO 4(％) | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
| Lead equivalent (mmPB) | 0 | 0.01 | 0.03 | 0.05 | 0.07 | 0.09 | 0.1 | 0.12 | 0.14 | 0.16 | - |
| Comparative example 27 | Embodiment 19 | |
Embodiment 21 | Embodiment 22 | Embodiment 23 | Embodiment 24 | Embodiment 25 | Embodiment 26 | Embodiment 27 | Comparative example 28 | |
| Bi(％) | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
| Lead equivalent (mmPB) | 0 | 0.05 | 0.08 | 0.1 | 0.13 | 0.15 | 0.17 | 0.193 | 0.22 | 0.26 | - |
| Comparative example 29 | Embodiment 28 | Embodiment 29 | Embodiment 30 | |
|
|
|
|
Embodiment 36 | Comparative example 30 | |
| BiO 3(％) | 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
| Lead equivalent (mmPB) | 0 | 0.04 | 0.06 | 0.08 | 0.1 | 0.13 | 0.15 | 0.18 | 0.24 | 0.34 | - |
Table 3
| Resin | WO 3 | Sb 2O 3 | Sn | Pb | The lamination number | Lead equivalent | Pulling strengrth | Tearing strength | Folding resistance | Situation is given birth in the generation of pin hole | |
| Unit | ％ | ％ | ％ | ％ | ％ | Number | mmPb | MPa | N/m | Circulation | Individual |
| Embodiment 37 | 22 | 13 | 30 | 35 | - | 2 | 0.26 | 5.5 | 18,000 | 83,000 | 0 |
| Comparative example 31 | 20 | - | - | - | 80 | 1 | 0.26 | 5.5 | 18,000 | 80,000 | 1～2 |
Claims (2)
1, a kind of radioactive ray screen, be used to shield radioactive ray, it is characterized in that, being that the radioactive ray screen of the film like below the 0.5mm is stacked by many thickness constitutes, and the radioactive ray screen of described film like mixes at least a in the metal monomer powders of antimony, tin, bismuth or the compound powder and mixes the metal monomer powders of tungsten or the compound powder of compound powder and/or barium forms in resin.
2. the manufacture method of the described radioactive ray screen of claim 1, it is characterized in that, in resin raw material, mix described metal monomer powders and/or compound powder, utilize extrusion forming method, calendering processing, cladding process or die forming legal system to produce after the radioactive ray screen of film like, many above-mentioned radioactive ray screens are stacked, carry out stacked processing.
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|---|---|---|---|
| CN 02154389 CN1287387C (en) | 2002-12-04 | 2002-12-04 | Radioactive ray screen and method for preparation of the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02154389 CN1287387C (en) | 2002-12-04 | 2002-12-04 | Radioactive ray screen and method for preparation of the same |
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|---|---|
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| CN1287387C true CN1287387C (en) | 2006-11-29 |
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| CN101137285B (en) * | 2007-10-12 | 2010-08-25 | 魏宗源 | Composite shielding material for medical X-ray protection |
| JP2013122398A (en) * | 2011-12-09 | 2013-06-20 | Fujix Ltd | Radiation shielding object, and radiation shielding product using radiation shielding object |
| CN104240782B (en) * | 2013-06-06 | 2016-12-28 | 日本华尔卡工业株式会社 | Lonizing radiation screened film and manufacture method thereof |
| CA2887612C (en) * | 2014-04-02 | 2018-05-15 | American Ceramic Technology, Inc. | Radiation shield with magnetic properties |
| CN105761769A (en) * | 2016-04-23 | 2016-07-13 | 上海大学 | Method for preparing tungstenic anti-radiation shielding film composite material through spin coating method |
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