Meltprocessable Fluoropolymer Blend with Liquid Crystalline Polymer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fluoropolymers like PTFE have high melt viscosity, making them difficult to process using conventional extrusion and injection molding methods due to their high melt viscosity, which exceeds the processing capabilities of these techniques.
Innovation Solution
A meltprocessable blend is created by mixing a melt-viscid fluoropolymer with a liquid crystalline polymer (LCP) at specific weight ratios, reducing the melt viscosity and enabling processing through extrusion or injection molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluoropolymer is used to achieve high chemical resistance, heat resistance, and low friction, then material performance is improved, but melt viscosity becomes excessively high making processing difficult
Solution Approach 1:
The patent applies composite materials by blending fluoropolymer particles with a thermoplastic binder resin to create a composite composition that combines the desirable properties of fluoropolymer (chemical resistance, low friction) with the processability of thermoplastics. The binder resin forms a continuous matrix that holds the fluoropolymer particles together, enabling conventional processing methods while maintaining the performance benefits of the fluoropolymer.
Solution Approach 2:
The patent changes the physical state and processing parameters by heating the fluoropolymer-binder composition to the melting point of the binder resin, transforming it from a solid particle mixture into a processable melt. This parameter change (temperature increase) enables the material to flow through extrusion or injection molding processes, solving the processability issue while maintaining fluoropolymer performance characteristics.
2Reliability
If fluoropolymer is used to achieve low dielectric constant and high resilience, then electrical and mechanical properties are improved, but the material cannot be processed by normal extrusion and injection molding
Solution Approach 1:
The invention creates a composite material system where fluoropolymer particles are dispersed in a thermoplastic binder matrix. This composite structure allows the material to be processed using conventional molding techniques (improving moldability) while the fluoropolymer particles maintain their inherent low dielectric constant and high resilience properties.
Solution Approach 2:
The thermoplastic binder resin acts as an intermediary that enables processing. It provides the continuous phase that allows the fluoropolymer particles to be shaped through extrusion and injection molding, while the binder itself is selected to have compatible electrical and mechanical properties that complement the fluoropolymer, ensuring the final composite meets both processability and performance requirements.
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 blend allows for the production of fluoropolymer articles that can be effectively processed into various forms, such as tapes and sheets, with improved tribological properties and surface interactions, facilitating their use in applications like bearings and seals.
Implementation Method 1
a liquid crystalline polymer (LCP) that has a melting point within 20° C. of the fluoropolymer
Implementation Method 2
mixing a melt-viscid fluoropolymer powder with a liquid crystalline polymer (LCP) to form a mixture
Implementation Method 3
The method can further include extruding the mixture into a product
Data Source
AI summary
A polymer article includes a meltprocessable blend of a melt-viscid fluoropolymer and a liquid crystalline polymer. Methods are presented for preparing a meltprocessable blend from a melt-viscid fluoropolymer and liquid crystalline polymer.