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Mixture for intrauterine device

A technology for intrauterine devices and mixtures, which is applied in the field of IUDs, can solve the problems of lack of high-quality low-density polyethylene, difficulty in detecting intrauterine devices, and low barium sulfate content, and achieve real-time detection, process stability, and Effect of high barium sulfate content

Inactive Publication Date: 2010-10-20
天津市医疗器械厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product is composed of high-density polyethylene and nano-barium sulfate, which lacks the high-quality characteristics of low-density polyethylene, and its content of barium sulfate is small, resulting in technical problems such as difficult detection and unclear development of the IUD.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The compound material for the intrauterine device is composed of low-density polyethylene and barium sulfate, and the weight percentage of low-density polyethylene and barium sulfate is 76% of low-density polyethylene and 24% of barium sulfate. Barium sulfate particles smaller than 10 μm account for 95% of the weight composition, and the whiteness is 97%.

Embodiment 2

[0017] The compound material for the intrauterine device is composed of low-density polyethylene and barium sulfate, and the weight percentage of low-density polyethylene and barium sulfate is 80% of low-density polyethylene and 20% of barium sulfate. The particle size of barium sulfate is 0.5μ, and the whiteness is 97%.

[0018] The processing and preparation process of this embodiment:

[0019] The mixing preparation method of the compound material for the intrauterine contraceptive device: put the low-density polyethylene and the barium sulfate into the feed box of the twin-screw extruder respectively. Its ratio is: low density polyethylene is 76~80%, barium sulfate is 20~24%. Among them, the barium sulfate should be evenly mixed in the low-density polyethylene. The melt blending of the two materials is driven by the twin-screw extruder to complete the mixing, pre-plasticization, and melted flow state. The screw is rotated and pushed through the die to forcefully extrude ...

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Abstract

The invention relates to a mixture for an intrauterine device, belonging to the technical field of intrauterine devices. The mixture for an intrauterine device is characterized in that the mixture comprises polyethylene and barium sulfate, wherein the weight percentages of the polyethylene and the barium sulfate are respectively 76-80% and 20-24%. The invention has the advantages of simple processing, stable process, precise control, high barium sulfate content, good product quality, convenient real-time detection, distinct development and the like.

Description

technical field [0001] The invention belongs to the technical field of contraceptive devices, in particular to a compound for intrauterine contraceptive devices. Background technique [0002] At present, polyethylene is widely used as a polymer material for medical supplies. Polyethylene has high toughness, can be blended with other materials, and is cheap. Patent 200810040800 discloses a nano-modified high-density polyethylene composite material and its preparation method, using modified nano-barium sulfate powder and high-density polyethylene. After the modified nano-barium sulfate is fully mixed with the dry high-density polyethylene material in proportion (nanoparticles account for 1 to 5% by mass of the high-density polyethylene), use a twin-screw extruder, pelletizer, Injection molding machine for processing. The product is composed of high-density polyethylene and nano-barium sulfate, which lacks the high-quality characteristics of low-density polyethylene, and its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K3/30
Inventor 程建民胡慧兰向欣方
Owner 天津市医疗器械厂有限公司
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