A method for surface modification of a polyolefin substrate, modified polyolefin materials and their use in the field of valves

By subjecting the polyolefin substrate to surface plasma and silanization treatment, grafted amino groups react with modified polyurethane to form chemical bonds, solving the problem of insufficient bonding strength between polyurethane and polyolefin, and achieving high strength and durability of the material, which is suitable for artificial heart valves.

CN122167801APending Publication Date: 2026-06-09PEIJIA MEDICAL (SUZHOU) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PEIJIA MEDICAL (SUZHOU) CO LTD
Filing Date
2024-12-06
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In existing technologies, the bonding strength between polyurethane and polyolefin is limited, resulting in low overall material strength and a tendency to delamination and cracking, making it difficult to meet the long-term use requirements of artificial heart valves.

Method used

By subjecting the polyolefin substrate to surface plasma treatment and silanization, amino groups are grafted onto it, and then it reacts with a modified polyurethane solution to form chemical bonds, thereby enhancing the bonding strength.

Benefits of technology

It improves the bond strength between polyolefin and polyurethane, ensures the overall consistency of the material, extends the service life of the modified polyolefin material, and enhances biocompatibility and material strength, making it suitable for the valve field.

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Abstract

The application provides a surface modification method of a polyolefin base material, a modified polyolefin material and application of the modified polyolefin material in the field of valves, which comprises the following steps: firstly, surface plasma treatment and silanization treatment are performed on the polyolefin base material to introduce active groups on the surface of the polyolefin base material, and then the polyolefin base material is modified by using diisocyanate according to the structural characteristics of polyurethane; and then, the chemical reaction between the modified polyurethane and the modified polyolefin base material is utilized to realize the modification of the polyurethane on the surface of the polyolefin base material. In the technical scheme, the formation of the chemical bond between the polyolefin and the polyurethane effectively enhances the bonding strength between the polyolefin and the polyurethane, ensures the overall consistency of the prepared modified polyolefin material, effectively improves the service life of the modified polyolefin material in clinical application, and solves the defects that the polyurethane valve material prepared in the prior art is prone to delamination and cracking during use.
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Citation Information

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