Fluoropolymer Coating Adhesion via Integrated Adhesive Polymers
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Solution Overview
Problem
Manufacturing laminates with preformed fluoropolymer films on polymeric substrates is expensive and requires capital-intensive equipment, as they necessitate thick adhesive layers and multiple processing steps, making it difficult to achieve durable bonds that withstand outdoor exposure.
Innovation Solution
A liquid fluoropolymer coating composition comprising fluoropolymers and compatible adhesive polymers with specific functional groups is applied directly to polymeric substrates, allowing for thinner coatings and reduced processing steps, while promoting strong adhesion and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If preformed fluoropolymer films are used to create laminates on polymeric substrates, then durable bonding and weather resistance are achieved, but manufacturing cost increases and processing complexity increases
Solution Approach 1:
The patent combines the fluoropolymer coating and adhesive layers into a single integrated coating composition applied directly to the substrate. This eliminates the need for separate adhesive application steps and multiple processing stages required by traditional preformed film lamination, while maintaining durable bonding through the compatible adhesive polymer components within the coating itself.
Solution Approach 2:
The patent changes the physical state and application method from solid preformed films requiring thermal lamination to liquid coating compositions that can be applied directly and cured in place. This parameter change from solid-to-liquid formulation enables simpler processing equipment and reduced manufacturing complexity while achieving equivalent or superior adhesion.
2Strength
If preformed fluoropolymer films are applied to substrates, then strong adhesion is achieved, but thick expensive layers of fluoropolymer are required
Solution Approach 1:
The patent incorporates adhesive polymer components with specific functional groups (carboxylic acid, sulfonic acid, amine, epoxy, etc.) that provide localized chemical bonding at the substrate interface. This allows thin fluoropolymer coating layers to achieve strong adhesion through chemical interaction rather than relying on thick physical layers for bonding strength.
Solution Approach 2:
The patent creates a composite coating composition combining fluoropolymer with compatible adhesive polymers and functional groups. This composite material structure enables thin coating layers to exhibit both the protective properties of fluoropolymer and the bonding capabilities of adhesive polymers, eliminating the need for thick fluoropolymer layers.
3Reliability
If multiple adhesive layers and primers are applied before lamination, then durable laminate structures are formed, but manufacturing cost increases
Solution Approach 1:
The patent merges multiple functional layers (adhesive primer and adhesive coating) into a single coating composition application step. The coating composition contains both the fluoropolymer protective layer and the adhesive bonding agents in one application, eliminating the need for separate primer and adhesive layer applications and reducing manufacturing cost.
Solution Approach 2:
The coating composition is prepared in advance with all necessary adhesive and protective components already integrated, eliminating the need for multiple sequential application steps. The preliminary formulation includes all functional groups needed for adhesion and protection, allowing single-step application that reduces manufacturing complexity and cost.
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
This method enables the production of fluoropolymer-coated substrates with improved adhesion and durability at lower costs, using thinner fluoropolymer layers and allowing for the incorporation of additives to enhance barrier properties, such as in photovoltaic modules.
Implementation Method 1
The polymeric substrate comprises functional groups on its surface that interact with said compatible adhesive polymer to promote bonding of said fluoropolymer coating to said substrate
Implementation Method 2
The solvent is removed from the coating composition applied to the substrate to form a fluoropolymer coating on the substrate
Data Source
AI summary
A process for making a fluoropolymer coated polymeric substrate comprising: applying a liquid fluoropolymer coating composition to a polymeric substrate, said fluoropolymer coating composition comprising fluoropolymer selected from homopolymers and copolymers of vinyl fluoride and homopolymers and copolymers of vinylidene fluoride polymer; solvent; and compatible adhesive polymer comprising functional groups selected from carboxylic acid, sulfonic acid, aziridine, amine, isocyanate, melamine, epoxy, hydroxy, anhydride and mixtures thereof; said polymeric substrate comprising functional groups on its surface that interact with said compatible adhesive polymer to promote bonding of said fluoropolymer coating to said substrate, removing the solvent from said coating composition applied to said substrate to form a fluoropolymer coating on said substrate.