Microcrystalline sacculus of reticular structure and preparation process thereof

A network structure and preparation technology, applied in the direction of balloon catheters, catheters, etc., can solve the problems of balloon processing difficulties, reduce the optical permeability of materials, etc., achieve enhanced dimensional stability and optical properties, and enhance compressive strength and the effect on tensile strength

Active Publication Date: 2016-02-17
GUANGDONG BROSMED MEDICAL DEVICE CO LTD
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Problems solved by technology

[0004] In order to prepare thin-walled pressure-resistant balloons, the current common practice is to fully crystallize the balloon to increase the crystallinity of the balloon material, but when the size of the crystal

Method used

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  • Microcrystalline sacculus of reticular structure and preparation process thereof

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[0025] The invention relates to a preparation process of a microcrystalline balloon with a network structure. The polymer material used in the preparation of the balloon should be a thermoplastic and crystallizable polymer, and its molecular chain should have a certain symmetry, but the crystallization ability should not be too strong. It includes the steps: a. drawing the parison, heating the polymer material tube at an appropriate temperature for a certain period of time, and then extending the axial stretch to obtain the parison; b, preheating the parison, filling the parison with high-purity nitrogen and Preheating at a higher temperature for a certain period of time, c. Stretch blowing of the balloon, balloon expansion and molding under the action of internal pressure and tension, d. High temperature and high pressure shaping, fully shaping under high temperature and high pressure, e. Microcrystallization treatment , Use cold water to quickly cool down the balloon, so that...

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Abstract

The invention discloses a microcrystalline sacculus of a reticular structure. The sacculus is prepared from non-water-soluble polymer materials by controlling the technological conditions in a two-way stretching and blow molding mode, and molecular chains of the sacculus are distributed in a mesh shape and contain a great number of microcrystalline structures. A preparation process of the microcrystalline sacculus of the reticular structure includes the following steps of 1, parison drawing, 2, parison preheating, 3, stretching and blow molding of the sacculus, 4, high-temperature high-pressure sizing and 5, microcrystallization treatment. The sacculus prepared through the process has the advantages of being high in compression strength, high in light transmittance performance, low in shrinking percentage, good in size stability and the like, a microcosmic microcosmic of the sacculus is of a reticular microcrystalline structure, and the microcrystalline sacculus can be used for treating hemadostenosis, intimal hyperplasia and other diseases.

Description

technical field [0001] The invention relates to the technical field of polymer medical devices, in particular to a microcrystalline balloon with a mesh structure and a preparation process thereof, which are mainly used for treating diseases such as vascular stenosis and intimal hyperplasia. Background technique [0002] Percutaneous transluminal angioplasty (PCI) is widely used in the treatment of stenotic lesions of the cardiovascular and peripheral vessels, and the balloon catheter can play a role in opening blocked vascular channels, squeezing thrombus, dilating stenotic lesions, The role of measuring the size of the lesion, therefore, the balloon catheter is an important instrument in PCI surgery. [0003] Most balloon catheters on the market consist of the following parts: balloon, double-lumen tubing, and Luer connector. Among them, the balloon can be used to expand or open the closed blood vessel, which is a key component to realize the medical function of the balloo...

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Application Information

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IPC IPC(8): A61M25/10
CPCA61M25/1002A61M25/1029A61M2025/1086
Inventor 张志军刘源王宇翔魏继兴胡景就龙俊
Owner GUANGDONG BROSMED MEDICAL DEVICE CO LTD
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