Silane Coupling Agent Metal-Plastic Composite Bonding
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Solution Overview
Problem
Existing metal-plastic composite materials face challenges with adhesive strength and formability, particularly due to the use of adhesives which can create volatile organic compounds, require excessive thickness, and may not secure sufficient bonding strength between metal and plastic layers, leading to issues like fine wrinkles and springback during processing.
Innovation Solution
A metal-plastic composite material is created with a silane coupling agent forming a thin film layer between the metal and plastic layers, allowing for covalent bonding through the application of heat and pressure, which enhances bonding strength and formability while minimizing interfacial surface area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an adhesive is applied to bond the plastic layer to the steel sheet, then bonding strength is improved, but harmful volatile organic compounds are created and the bonding layer thickness increases excessively
Solution Approach 1:
The patent removes the adhesive layer entirely from the bonding system. Instead of using adhesive to bond the plastic layer to the steel sheet, the invention directly bonds the plastic layer to the steel sheet through surface treatment (phosphating or metal plating) followed by direct lamination and heating, thereby eliminating the source of volatile organic compounds while maintaining bonding strength
Solution Approach 2:
The patent introduces an intermediate surface treatment layer (phosphate coating or metal plating) on the steel sheet surface as a mediator between the steel sheet and plastic layer. This intermediate layer enhances bonding strength through chemical interaction and mechanical interlocking, replacing the need for organic adhesive while preventing harmful emissions
2Weight of moving object
If a high-strength steel sheet of predetermined thickness or less is used, then weight is reduced, but fine wrinkles or springback occur during processing
Solution Approach 1:
The patent creates a composite structure consisting of the steel sheet, surface treatment layer (phosphate or metal plating), and plastic layer. This composite material system provides enhanced surface flatness and dimensional stability during processing compared to bare thin steel sheets, while maintaining weight reduction benefits. The plastic layer acts as a protective skin that prevents wrinkle formation and springback in thin-gauge steel
3Strength
If the metal layer and plastic layer are bonded with adhesive, then bonding is achieved, but the bonding layer thickness is excessive and processing time increases
Solution Approach 1:
The patent eliminates the adhesive layer from the bonding process, removing the time-consuming steps of adhesive application, positioning, and extended curing. The direct bonding method through surface treatment and thermal lamination reduces processing time while achieving adequate bonding strength for automotive applications
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 approach results in a significantly stronger and more durable bond with reduced processing time, preventing issues like fine wrinkles and springback, and provides consistent bonding strength regardless of the plastic type, while avoiding the use of volatile organic compounds.
Implementation Method 1
forming a thin film layer formed of a silane coupling agent by coating a silane coupling agent on one surface or both surfaces of a metal layer
Implementation Method 2
the metal layer and the plastic layer are bonded to each other by a covalent bond with the silane coupling agent
Implementation Method 3
bonding the metal-plastic laminated material by applying heat and pressure thereto
Data Source
AI summary
The present invention provides a metal-plastic composite material having excellent adhesive strength and formability and a method for manufacturing the same, and specifically, the present invention provides a metal-plastic composite material and a method for manufacturing the same comprising: a metal layer; and a plastic layer on at least one surface of the metal layer, wherein a thin film layer formed of a silane coupling agent is provided between the metal layer and the plastic layer, and the metal layer and the plastic layer are bonded by covalent bonding with the silane coupling agent.