Polymer valve leaflet material and integrally-formed preparation method and application thereof

CN119698308APending Publication Date: 2025-03-25VENUS MEDTECH (HANGZHOU) INC
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Patent Information

Application Number
CN202380059018.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-08-22
Filing Date
2023-07-12
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

Existing polymer valve materials are prone to creep, tearing at weak points and poor durability during use, causing the valve to bear greater stress during the cardiac cycle, easily causing calcification and poor durability.

Method used

Electrospinning technology is used to prepare 3D integrated polymer leaflet materials. Through the compounding steps of polyurethane A and polyurethane B, leaflets with uniform thickness and high strength are formed, which slows down calcification and deformation and improves tear resistance.

Benefits of technology

The valve leaflets can withstand small stress during the cardiac cycle, extend the service life, improve creep and edge tear resistance, enhance fatigue resistance, and reduce the risk of calcification.

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Abstract

The invention discloses a high-molecular valve leaflet material and an integrally-formed preparation method and application thereof, and the preparation method comprises the following steps: a spinning step: carrying out electrostatic spinning on a polyurethane A solution to a receiver, and obtaining a prefabricated film on the receiver; and a compounding step: compounding polyurethane B and the prefabricated film to obtain the polymer valve material. The problems that in an existing impregnation process, the thicknesses of all positions of the valve leaflet are not uniform, weak points exist in the valve leaflet, and the valve leaflet is prone to being torn at the weak points are solved, and then the problems that an existing valve leaflet is prone to creeping, low in overall strength and poor in tear resistance are solved.
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