Medical high-strength expanded polytetrafluoroethylene membrane product and preparation method thereof

Abstract

The invention discloses a medical high-strength expanded polytetrafluoroethylene membrane product and a preparation method thereof. The preparation method comprises the following steps of first, preparing expanded polytetrafluoroethylene layers; second, overlaying the two expanded polytetrafluoroethylene layers obtained in the first step in a staggering manner by a 90-degree included angle according to respective fiber direction, and placing an adhesive layer between the two layers; and third, fixing and pressurizing the overlaid body obtained in the second step vertically along an overlayingdirection, then heating and keeping warm for a period, so as to obtain the expanded polytetrafluoroethylene membrane product. The layers are staggered and overlaid by a 90-degree included angle according to the fiber direction, so that the directional difference is reduced or eliminated, and sewing demands in surgery are met; and the adhesive layer is a physical layer, has a blocking effect so asto avoid secondary operation when necessary, and is easy to separate and take out.

Description

technical field [0001] The invention relates to the field of medical materials, in particular to a medical high-strength expanded polytetrafluoroethylene diaphragm product and a preparation method thereof. Background technique [0002] Expanded polytetrafluoroethylene (expanded polytetrafluoroethylene, e-PTFE) is commonly known as "expanded body" in the industry. It is characterized by the "stretching" process, which produces a large number of "nodes and fibers" structures and forms micropores. It is precisely because of these special microporous structures that endow expanded polytetrafluoroethylene with special properties: good biological phase Capacitance, stability, hydrophobicity, flexibility, etc. Since its appearance in the 1960s, it has been widely used in industrial, military, medical and other fields. However, the expanded polytetrafluoroethylene material currently used clinically has certain deficiencies, namely: [0003] (1) With direct thermal bonding, the pe...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a medical high-strength expanded polytetrafluoroethylene diaphragm product and its preparation method to solve the problems of insufficient tensile strength and directionality of the expanded polytetrafluoroethylene sheet against suture tension

Images