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X-ray shielding composite material and preparation method thereof

A composite material and X-ray technology, which is applied in the field of X-ray shielding composite materials and its preparation, can solve the problems of inability to achieve effective separation of metal powder, easy agglomeration, and difficulty in obtaining metal powder, etc., and achieve strong bonding and improved mechanical properties. Performance, the effect of improving the binding force

Active Publication Date: 2021-09-17
WEIGAO HLDG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The liquid coupling agent method used in the pretreatment of metal and metal compound powders in the current technology requires stirring and other methods to achieve the coupling and grafting of the coupling agent and the metal powder, but for most metals, especially bismuth, antimony and other metal powders Grind to a lower particle size, such as below 100 μm, due to the characteristics of the metal itself, it is easy to agglomerate, and stirring cannot achieve effective separation of the metal powder. In this case, it is not easy to obtain metal powder with a lower particle size by stirring

Method used

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  • X-ray shielding composite material and preparation method thereof
  • X-ray shielding composite material and preparation method thereof

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preparation example Construction

[0040] The invention provides a preparation method of an X-ray shielding composite material, comprising the following steps:

[0041] a) coating the cyanoacrylate adhesive to form a cyanoacrylate film / sheet;

[0042] b) spraying X-ray shielding powder onto said cyanoacrylate film / sheet before curing of the cyanoacrylate to form a composite;

[0043] c) pulverizing after the cyanoacrylate in the compound is cured to obtain cyanoacrylate-coated X-ray shielding particles;

[0044] d) blending and molding the cyanoacrylate-coated X-ray shielding particles with a base material to obtain an X-ray shielding composite material;

[0045] The base material is plastic or rubber.

[0046] According to the present invention, a cyanoacrylate adhesive is applied to form a cyanoacrylate film / sheet.

[0047] In the present invention, the cyanoacrylate adhesive is also called 502 glue. The applicant found that cyanoacrylate has a strong bonding force with metal, and combined with its fast cu...

Embodiment 1

[0077] 1.1 Materials

[0078] Base material: modified polyvinyl chloride

[0079]

[0080] X-ray shielding:

[0081] 545.55 parts by mass of lead powder (the total mass ratio of base material+lead powder is 84.47%).

[0082] 1.2 Preparation

[0083] S1. Uniformly coat the cyanoacrylate adhesive on the polytetrafluoroethylene roller (the coating thickness is 0.1mm) through the prolate die, ensure that the roller rotates at a constant speed, and form a cyanoacrylate film on the roller.

[0084] S2. After the lead powder is ball-milled in a ball mill (the particle size of the ball mill is 50 μm), it is passed into a high-speed compressed air flow, and the metal powder is blown onto the surface of the cyanoacrylate film (spraying density is 0.05g / cm 2 ), the spraying position is close to one end of the die, and the cyanoacrylate film coated with metal powder is collected on the other side of the roller.

[0085] S3, pulverize the film, use gas purging after pulverization to...

Embodiment 2

[0089] 1.1 Materials

[0090] Base material: modified polyvinyl chloride

[0091]

[0092] X-ray shielding:

[0093] 545.55 parts by mass of lead powder (the total mass ratio of base material+lead powder is 84.47%).

[0094] 1.2 Preparation

[0095] S1. Uniformly coat the cyanoacrylate adhesive on the polytetrafluoroethylene roller (the coating thickness is 0.1 mm) through the prolate die, ensure that the roller rotates at a constant speed, and form a cyanoacrylate film on the roller.

[0096]S2. After the lead powder is ball-milled in a ball mill (the particle size of the ball mill is 50 μm), it is passed into a high-speed compressed air flow, and the metal powder is blown onto the surface of the cyanoacrylate film (spraying density is 0.05g / cm 2 ), the spraying position is close to one end of the die, and the cyanoacrylate film coated with metal powder is collected on the other side of the roller.

[0097] S3, pulverize the film, use gas purging after pulverization to...

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Abstract

The invention provides an X-ray shielding composite material and a preparation method thereof. The method comprises the following steps: firstly, coating a specific cyanoacrylate adhesive to form a thin film / sheet; before curing, spraying X-ray shielding material powder on the surface of the substrate; after the adhesive is cured, crushing the whole compound to obtain a better coating filler, namely cyanoacrylate coated X-ray shielding material particles, which is controllable in dispersion and distribution; blending and molding the particles and a base material to obtain the X-ray shielding composite material. Dispersion of coated X-ray shielding particles in the base material is improved, agglomeration of the X-ray shielding particles especially when the particle size is small is effectively controlled, the obtained X-ray shielding composite material is uniform and stable in performance, and X-ray shielding can be effectively achieved when the material is low in thickness. Compared with the prior art, the material thickness is greatly reduced, and the cost is further reduced; meanwhile, the cyanoacrylate adhesive has good compatibility with a high polymer base material, so that the mechanical property of the material is effectively improved.

Description

technical field [0001] The invention relates to a shielding material, in particular to an X-ray shielding composite material and a preparation method thereof. Background technique [0002] With the deepening of ray research in the fields of medical imaging, interventional medicine, and fluoroscopy, more and more X-ray equipment is used in medical imaging, interventional surgery, etc. However, as people's understanding of X-rays continues to expand, their awareness of the hazards of X-rays has gradually increased. On October 27, 2017, the list of carcinogens released by the International Agency for Research on Cancer of the World Health Organization was initially compiled for reference, and X-rays were listed as one of the list of carcinogens. [0003] The main harm of X-rays to people includes two kinds of random effects and non-random effects. Among them, the random effects are related to the dose threshold of exposure to X-rays, which may lead to carcinogenesis, genetic e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L91/06C08L53/02C08L23/12C08K13/06C08K9/10C08K3/08C08K5/12C08K5/098G21F1/08G21F1/10
CPCC08K13/06C08K9/10C08K3/08C08K5/12C08K5/098C08L91/06G21F1/085G21F1/08G21F1/106C08K2201/014C08K2003/0837C08K2003/0875C08L2205/03C08L27/06C08L53/025C08L23/12
Inventor 尹云山尹立刚陈家悦李晓明殷敬华姜响鹏高云刘应福
Owner WEIGAO HLDG