Transparent Elastic Composite Film for Uneven Substrates
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Solution Overview
Problem
Existing transparent elastic composite films struggle to conform to uneven substrate structures during hot pressing, leading to issues like glue overflow and device damage, and require adjustment in surface contact characteristics for applications as either peelable release or encapsulant films.
Innovation Solution
A transparent elastic composite film comprising a first film layer with crosslinked acrylic resin and aliphatic polyisocyanate, and a second film layer with hydroxyl-containing acrylic resin, allowing for tuning of weight ratios and inclusion of polysiloxane and solvents, enabling conformability and adjustable adhesion properties through hot pressing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the transparent elastic composite film uses conventional polymeric materials, then it has small volume and light weight, but it cannot conform to uneven substrate structures during hot pressing
Solution Approach 1:
The patent changes the chemical composition parameters of the polymeric material by incorporating specific ratios of acrylic resin (0.1-1.0 parts), aliphatic polyisocyanate (0.1-1.0 parts), and polysiloxane (0.01-0.5 parts) to achieve optimal conformability to uneven substrates while maintaining surface uniformity
Solution Approach 2:
The patent creates a composite polymeric material combining multiple components (acrylic resin, aliphatic polyisocyanate, polysiloxane, and solvent) that work synergistically to provide both conformability to uneven surfaces and surface uniformity, resolving the contradiction between shape adaptation and surface quality
2Adaptability or versatility
If the transparent elastic composite film is designed for peelable release function, then it has good flexibility, but it cannot provide excellent adhesion for encapsulation
Solution Approach 1:
The patent makes the surface contact characteristic dynamic and adjustable by controlling the composition ratios and processing conditions, allowing the film to transition between peelable release mode (lower adhesion) and encapsulation mode (high adhesion) based on application requirements
Solution Approach 2:
The patent adjusts the adhesion properties by changing compositional parameters (ratios of acrylic resin to polyisocyanate, amount of polysiloxane) and processing parameters (hot pressing temperature, time, pressure) to achieve the desired balance between peelability and adhesion strength
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 film effectively fills uneven substrate structures, prevents glue overflow, and can be tailored for either peelable release or encapsulation with excellent adhesion, as demonstrated by adhesion strength and peel test results, ensuring protection and integration with electronic devices.
Implementation Method 1
the first film layer and the second film layer have crosslinked network structures; the first film layer includes acrylic resin and aliphatic polyisocyanate
Implementation Method 2
during hot pressing process, the transparent elastic composite film needs to fill-in the uneven structure of a substrate
Data Source
AI summary
The present disclosure provides a transparent elastic composite film, which includes a first film layer; a thermoplastic polyurethane layer; and a second film layer; wherein the first film layer and the second film layer have a crosslinked network structure; the first film layer includes acrylic resin and aliphatic polyisocyanate, wherein the acrylic resin includes hydroxyl-containing acrylic resin, and a weight ratio of the acrylic resin to the aliphatic polyisocyanate is 1/1 to 1/1.2, and a weight ratio of the hydroxyl-containing acrylic resin to the acrylic resin is 0.1/1 to 0.18/1.