Fluoropolymer Coating Composition for Mold Releasability
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Solution Overview
Problem
Conventional fluoropolymer coatings on mold surfaces lose releasability with repeated molding and require frequent re-application of releasing agents, leading to unsatisfactory durability and productivity.
Innovation Solution
A fluoropolymer coating composition containing a fluoropolymer and fluoro oil with a decomposition temperature higher than the melting point of the fluoropolymer, dispersed with a surfactant and filler, applied as a water or powder coating and heat-treated to form a durable, non-adhesive coating film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fluoropolymer coatings are applied to mold surfaces, then releasability is achieved, but the coating loses releasability with repeated molding and requires frequent re-application
Solution Approach 1:
The invention changes the chemical composition parameters of the coating by incorporating specific fluorinated compounds (perfluoroalkyl group compounds, fluorosilicone compounds, fluorinated polyester compounds) in controlled amounts (0.1-10 wt% each) to maintain releasability over extended periods. This compositional adjustment allows the coating to withstand repeated molding cycles without losing its non-adhesive properties
Solution Approach 2:
The invention creates a composite coating system combining fluoropolymer base resin with multiple fluorinated additive compounds. This composite structure leverages the synergistic effects of different fluorinated substances to enhance durability and maintain releasability, transforming the single-component conventional coating into a multi-component system with improved performance
2Reliability
If releasing agents are re-applied frequently to maintain releasability, then releasability is sustained, but productivity decreases due to frequent interruptions
Solution Approach 1:
The invention incorporates fluorinated compounds directly into the coating formulation during manufacturing, so the releasability function is built-in from the start. This preliminary incorporation eliminates the need for frequent re-application of releasing agents during production, allowing continuous molding operations without interruption
Solution Approach 2:
The coating system is designed to self-maintain its releasability properties through the gradual migration and redistribution of fluorinated compounds within the coating matrix during molding cycles. This self-service mechanism eliminates the need for external intervention (re-applying releasing agents) to sustain performance
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 coating composition achieves excellent releasability and durability, maintaining non-adhesiveness and wear resistance over a long period, enhancing mold formability and productivity.
Implementation Method 1
applied as a water or powder coating and heat-treated to form a durable, non-adhesive coating film
Data Source
AI summary
This application provides a coating film having excellent durability and wear resistance that, when applied to a mold surface, has excellent releasability (non-adhesiveness) over a long period of time, and a fluoropolymer coating composition that is able to form such a coating film. The fluoropolymer coating composition contains a fluoropolymer and a fluoro oil, where the decomposition temperature of the fluoro oil is higher than the melting point of the fluoropolymer.