Inline Lamination of High-Rigidity Multilayer Substrates
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Solution Overview
Problem
The existing two-step laminating process for high-rigidity multilayer substrates is complex, inefficient, and costly, with independent equipment and procedures for dry and solvent-free lamination, leading to material waste, long manufacturing cycles, and high defective rates.
Innovation Solution
A high-rigidity multilayer substrate-based laminating method and apparatus that integrates solvent-based or water-based adhesive coating and drying with solvent-free adhesive coating, allowing for inline three-layer lamination of PET, AL, and heat-sealing film or VMPET, using a coordinated lamination process with tension control units and cooling cylinders to optimize substrate alignment and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a two-step laminating process (dry lamination followed by solvent-free lamination) is used for high-rigidity multilayer substrates, then the adhesion quality and barrier properties are improved, but the production efficiency deteriorates due to complex organization, low efficiency, material waste, and long manufacturing cycles
Solution Approach 1:
The patent combines the dry lamination process and solvent-free lamination process into a single integrated production line. The apparatus includes both a drying box for solvent-based adhesive evaporation and a solvent-free coating unit with multi-roller transfer mechanism, allowing both lamination methods to operate simultaneously in sequence without requiring separate production lines, thereby improving production efficiency while maintaining lamination quality
Solution Approach 2:
The patent segments the lamination process into distinct functional modules within a single apparatus: the first coating unit with drying box for dry lamination, and the second coating unit with multi-roller transfer for solvent-free lamination. This segmentation allows each process to be optimized independently while operating in an integrated system, resolving the contradiction between quality and efficiency
2Manufacturing precision
If two independent production lines (one for dry lamination, one for solvent-free lamination) are used, then the advantages of both methods are integrated, but the device complexity and cost increase
Solution Approach 1:
The patent merges two independent production lines into one integrated apparatus by arranging the drying box and solvent-free coating unit in sequence within a single machine frame. Both the first coating unit (with drying box) and second coating unit (with multi-roller transfer) share common support structures, control systems, and substrate transport mechanisms, reducing overall device complexity while maintaining the functional advantages of both lamination methods
3Adaptability or versatility
If two independent production lines are used for dry and solvent-free lamination, then process flexibility is improved, but the manufacturing cycle time and material turnover increase
Solution Approach 1:
The patent enables continuous substrate processing by arranging the dry lamination and solvent-free lamination processes in sequence within a single apparatus. The substrate moves continuously from the first coating unit through the drying box to the second coating unit without interruption, eliminating the need to stop and restart between processes, thereby reducing manufacturing cycle time while maintaining process flexibility
Solution Approach 2:
The patent performs the dry lamination process first (with adhesive application and drying) before proceeding to the solvent-free lamination process. This preliminary action allows the first adhesive layer to be properly established and dried before the second solvent-free adhesive is applied, ensuring proper adhesion bonding while maintaining continuous production flow without interruptions
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 reduces machine startup frequencies, auxiliary and transfer times, material turnover, and overall production costs, while improving lamination quality and reducing defective rates by enabling a single-pass production of high-rigidity three-layer structures.
Implementation Method 1
coated with a solvent-based or water-based adhesive, which is then volatilized and dried in a drying box
Implementation Method 2
Guiding the dual-layer laminated film of PET and AL into the cooling cylinder of the laminating apparatus for cooling, and making the heated PET web directly contact the cooling cylinder surface
Data Source
Figure 1~2
Figure 3~4
AI summary
A high-rigidity multilayer substrate-based laminating apparatus and method. The laminating apparatus includes a frame (26) and sequentially arranged a first station (1), a second station (2), a third station (3), and a fourth station (4) from left to right. The upper left side of the frame (26) is equipped with a tunnel-type drying oven (5), and the upper part of the third unit (3) is equipped with a high-position unwinding unit (6). The suitable laminator model and web path will be choosen according to the substrate type and layer permutation of the high-regidity structures to be laminated, and then solvent-based or water-based adhesive is applied with gravure-coating or flexo-coating for between the surface and intermediate layers, and with solventless coating for between the intermediate and interior layers, so that the three-layer laminating accomplished inline in one pass, forming a composite product with a three-layer laminated structure with a high-rigidity substrate. The production of high-rigidity substrate-based three-layer structure using the method of this invention reduces startup frequency, shortens auxiliary, transfer, and curing times, minimizes material handling and employee work hours, shortens the production cycle, and lowers defect rate and overall production costs.