Fluoropolymer Composition Surface Migration
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Solution Overview
Problem
Conventional methods for achieving low or non-tackiness and low or non-adhesion in fluoropolymer compositions often result in dimensional precision variations, safety issues, degradation of sealing properties, and physical property deterioration, while also requiring complex processes and special equipment.
Innovation Solution
A fluoropolymer composition containing perfluoroolefin units or partially fluorinated olefin units, polytetrafluoroethylene with a melting point of 200° C. or more and 300° C. or less, and a crosslinking agent or crosslinking promoter, which forms a polytetrafluoroethylene layer on the surface, providing low or non-tackiness, low or non-adhesion, high water repellency, and low friction properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If conventional methods (oils, surface treatments, plasma) are used to reduce tackiness and adhesion, then low or non-tackiness and low or non-adhesion are achieved, but dimensional precision varies, sealing properties degrade, and physical properties deteriorate
Solution Approach 1:
The invention extracts and eliminates the need for conventional additives (oils, crosslinking agents, surface treatments) by using a specific fluoropolymer composition where polytetrafluoroethylene naturally migrates to the surface during vulcanization, forming a low-tack surface layer without requiring external additives or post-treatments
Solution Approach 2:
The invention changes the physical and chemical parameters of the fluoropolymer composition by controlling the molecular weight, melting point, and composition ratios of specific fluoropolymers (polytetrafluoroethylene with melting point 200-300°C, partially fluorinated olefins) to enable spontaneous surface migration and formation of a non-tacky surface without additives
2Object-generated harmful factors
If additional oils are used to reduce sticking and adhering, then low or non-tackiness is achieved, but physical properties become inferior and contamination occurs
Solution Approach 1:
The invention completely removes oils and conventional additives from the fluoropolymer composition, relying instead on the inherent properties of polytetrafluoroethylene to migrate to the surface and provide low-tack characteristics without compromising physical properties or causing contamination
Solution Approach 2:
The invention creates a composite fluoropolymer system combining multiple fluoropolymer types (polytetrafluoroethylene, partially fluorinated olefins, vinylidene fluoride copolymers) with specific molecular weights and melting points that work synergistically to provide both structural integrity and surface non-tackiness
3Object-generated harmful factors
If crosslinking agents and surface treatments are applied to achieve low or non-adhesion, then adhesion is reduced, but the process becomes complex and sealing properties are degraded
Solution Approach 1:
The invention eliminates the need for separate crosslinking agents and surface treatment processes by incorporating all necessary functions into the base fluoropolymer composition itself, where polytetrafluoroethylene naturally migrates to the surface during vulcanization to form a low-adhesion layer
Solution Approach 2:
The fluoropolymer composition performs multiple functions simultaneously: it provides structural integrity, vulcanization, and surface non-adhesion properties all through the base polymer system without requiring separate additives or post-treatment steps
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 solution effectively maintains excellent sealing and physical properties while reducing tackiness and adhesion, achieving strong water repellency and low friction without the need for excessive polytetrafluoroethylene, thus preventing surface desorption and maintaining the original properties of the fluoropolymer.
Implementation Method 1
a fluoropolymer composition containing perfluoroolefin units or partially fluorinated olefin units, polytetrafluoroethylene having a melting point of 200° C. or more and 300° C. or less, and a crosslinking agent or a crosslinking promoter, or a combination thereof
Data Source
AI summary
A fluoropolymer composition is provided containing a polymer containing perfluoroolefin units or partially fluorinated olefin units or a combination thereof, polytetrafluoroethylene having a melting point a melting point of 200° C. or more and 300° C. or less, and a crosslinking agent or a crosslinking promoter or a combination thereof. A molded article having a polytetrafluoroethylene layer on a surface is also provided.