PVC–Metal Multilayer Structures With Silane Tie-Layer Bonding
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Solution Overview
Problem
The challenge of achieving strong adhesion between polyvinyl chloride (PVC) and metal layers in anti-corrosion panels, particularly at high temperatures, due to the lack of covalent bonding in solvent-free binders, is addressed.
Innovation Solution
Incorporation of silane coupling agents to increase the polarity and reactivity of PVC surfaces, forming chemical bonds with a tie layer that adheres to both PVC and metal layers, enhancing bonding performance at high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If solvent-free binders are used to laminate PVC onto metal, then the bonding process is simplified and environmental friendliness is improved, but adhesion strength at high temperature deteriorates due to lack of covalent bonding
Solution Approach 1:
The patent introduces silane coupling agents as intermediary substances between the PVC layer and metal substrate. These agents form chemical bridges through covalent bonding: one end bonds to the metal surface while the other end bonds to the PVC polymer chains, creating a strong chemical bridge that maintains adhesion at high temperatures despite using solvent-free binders
Solution Approach 2:
The patent modifies the chemical parameters of the binder system by incorporating silane coupling agents with specific functional groups. This changes the bonding mechanism from purely physical adhesion to chemical covalent bonding, enabling the system to maintain strength at elevated temperatures while keeping the process environmentally friendly
2Strength
If silane coupling agents are incorporated into the tie layer or applied as primer, then chemical bonds and adhesion are improved, but the complexity of the multi-layer structure increases
Solution Approach 1:
The silane coupling agent serves multiple functions simultaneously: it acts as a primer layer, a chemical bonding agent, and an adhesion promoter. This multi-functionality allows the system to achieve strong chemical bonding without adding excessive structural complexity, as one material performs multiple critical roles in the lamination process
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 use of silane coupling agents in multi-layer structures with tie layers and primer applications results in improved adhesion and peel strength between PVC and metal layers, ensuring effective bonding under high-temperature conditions.
Implementation Method 1
the adhesion onto PVC is by polar or secondary valence bonding instead of covalent bonds
Implementation Method 2
the adhesion onto PVC is by polar or secondary valence bonding
Implementation Method 3
chemical reactions are trigged to form covalent bonds between PVC and tie layer
Implementation Method 4
This tie layer package possesses good bonding performance at high temperatures
Data Source
AI summary
The present disclosure provides embodiments of multi-layer structures and methods of making, the multi-layer structures comprising at least one polyvinyl chloride (PVC) layer, at least one metal layer, and at least one tie layer adhering the steel layer to the PVC layer, wherein the tie layer comprises: 0 to 95 wt. % of at least one ethylene acrylate copolymer; and 5 to 100 wt. % of terpolymer, wherein the multi-layer structure includes silane coupling agent is disposed in the tie layer, added as a primer, or both.