Polyurethane Valve Material Creep Resistance via Electrospun Scaffold
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Solution Overview
Problem
Polymer valves used in medical applications are prone to creep, elongation, and deformation, which affects their fluid performance and leads to poor edge tear strength and cracking, limiting their development and use.
Innovation Solution
A polymer valve material is developed using a scaffold of electrospun first polyurethane and a composite layer of second polyurethane, with the second polyurethane fully infiltrating the scaffold to enhance mechanical properties and interface bonding, thereby improving creep resistance and edge tear resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polymer materials are used for valve preparation, then the valve is easy to process and has good thickness and performance uniformity, but the valve is prone to creep, elongation, and deformation during use
Solution Approach 1:
The patent uses a composite structure consisting of a polymer matrix combined with a mesh reinforcement layer. The mesh layer provides structural support to prevent creep and deformation, while the polymer matrix maintains ease of processing and manufacturing. This composite approach allows the valve to retain the processing advantages of polymer materials while overcoming their inherent dimensional instability.
Solution Approach 2:
The mesh layer in the composite structure creates a porous reinforcement framework that integrates with the polymer matrix. This porous structure provides mechanical support to resist creep and elongation while allowing the polymer material to maintain its processing advantages and uniformity.
2Reliability
If polymer materials are used for valve preparation, then the valve has good biocompatibility, but the valve has poor edge tear strength and is prone to cracking
Solution Approach 1:
The composite structure combines a polymer matrix with a mesh reinforcement layer, where the mesh provides enhanced edge tear strength and crack resistance. The polymer matrix maintains biocompatibility, while the reinforcement layer addresses the mechanical weakness at edges and boundaries.
Solution Approach 2:
The mesh reinforcement is strategically positioned within the polymer matrix to provide localized strength enhancement at critical areas such as edges and high-stress zones. This local reinforcement approach specifically addresses edge tear strength and crack resistance without compromising the overall biocompatibility of the polymer material.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed solution significantly enhances the mechanical strength, edge tear resistance, and creep resistance of polymer valves, extending their service life and improving their performance in medical applications.
Implementation Method 1
a scaffold, prepared with a first polyurethane as a raw material by electrospinning
Implementation Method 2
the second polyurethane fully infiltrates into the scaffold, and finally fills in the meshes of the scaffold and composites onto the surface of the scaffold
Data Source
AI summary
Disclosed is a polymer valve material, which includes a scaffold, prepared with a first polyurethane as a raw material by electrospinning; and a composite layer, prepared with second polyurethane as a raw material and composited onto the scaffold. The present disclosure further discloses a method for preparing a polymer valve material, including: a spinning step, electrostatic spinning a first polyurethane solution to obtain a prefabricated film; a compositing step, compositing second polyurethane and the prefabricated film to obtain the polymer valve material; and an adjustment step, heat pressing the prefabricated film before or during compositing. The valve material of the present disclosure can improve the creep resistance and edge tear resistance of the valve, as well as extends its service life.