Film Substrate Bonding with Cooling-Roller Deformation Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for bonding film-like substrates using small amounts of adhesive face challenges such as substrate deformation, air bubble formation, and reduced mechanical and optical properties, necessitating complex process setups or special resins to ensure dimensionally stable lamination.
Innovation Solution
A method involving a film-shaped substrate with a thermoplastic surface that is heated and cooled oppositely by a rotating cooling roller, allowing the substrates to be bonded under pressure with minimal adhesive, using conventional adhesives and maintaining dimensional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a thermoplastic substrate surface is heated to smooth it before bonding, then the surface smoothness is improved, but the substrate deforms and stretches making it difficult to guide during lamination
Solution Approach 1:
The patent applies local quality by differentiating the thermal treatment of different substrate surfaces. The bonding surface is heated to become thermoplastic and smooth, while the opposite surface is actively cooled to remain cool and dimensionally stable. This localized temperature differentiation allows the heated surface to be smoothed for bonding without causing overall substrate deformation, as the cooled surface maintains structural integrity and guides the substrate through the lamination process.
Solution Approach 2:
The cooling roller acts as an intermediary element that selectively cools the non-bonding surface of the substrate. This intermediary cooling mechanism counteracts the thermal expansion and deformation caused by heating the bonding surface, enabling the substrate to maintain its shape and dimensional stability during the lamination process while still achieving the necessary surface smoothness for bonding.
2Loss of substance
If the amount of adhesive is reduced, then resource usage and waste are decreased, but delamination and air bubble formation increase impairing mechanical and optical properties
Solution Approach 1:
The patent changes the physical parameter of the substrate surface by heating it to a thermoplastic state, which smooths the surface and enhances adhesive wetting. This parameter change allows for reduced adhesive quantities while maintaining reliable bonding, as the smoothed thermoplastic surface provides better contact and distribution of the adhesive, preventing delamination and air bubble formation even with minimal adhesive application.
3Loss of substance
If conventional adhesives are used with minimal quantities, then resource efficiency is improved, but substrate deformation and poor bonding occur without special resins or complex setups
Solution Approach 1:
The patent applies preliminary action by heating and smoothing the substrate surface before adhesive application. This pre-treatment of the substrate surface creates optimal conditions for adhesive bonding, allowing conventional adhesives to perform effectively with minimal quantities. The preliminary thermal treatment eliminates the need for special resins or complex process setups, as the smoothed thermoplastic surface ensures proper adhesive distribution and bonding even with simple conventional adhesives.
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 method achieves a resilient bond with excellent strength and minimal adhesive usage, preventing substrate deformation and air bubbles, while maintaining mechanical and optical properties.
Implementation Method 1
the surface of this substrate opposite the thermoplastic surface is cooled using a cooling roller
Implementation Method 2
the thermoplastic surface of the first substrate is converted into a softened state by heating
Data Source
Figure 1~2
AI summary
The present invention relates to a method for adhesively bonding substrates in film form, wherein one of the substrates has a thermoplastic surface which is converted into a softened state prior to adhesive bonding, and wherein the surface of this substrate that is opposite to the thermoplastic surface is cooled using a cooling roller. Furthermore, the present invention relates to a device for carrying out the method according to the invention.