Polyamide Resin Film Composition for UV-Stable Transparency
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Solution Overview
Problem
Polyimide resins face challenges in achieving transparency and mechanical properties due to charge transfer complex formation, scratch resistance issues, and poor molecular weight due to solvent deterioration, limiting their use in applications requiring both.
Innovation Solution
A polyamide resin film with a color difference variation rate (Eab1) of 2.5 or less under ultraviolet irradiation, incorporating aromatic amide repeating units and a UV stabilizer, maintains transparency and mechanical strength by minimizing molecular structure deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polyimide resins are used to achieve heat resistance and chemical resistance, then mechanical properties are improved, but transparency deteriorates due to charge transfer complex formation
Solution Approach 1:
The patent changes the chemical structure parameter from polyimide to polyamide resin, which fundamentally alters the molecular configuration to eliminate charge transfer complex formation while maintaining mechanical strength. This parameter change resolves the contradiction by modifying the resin's chemical composition rather than adjusting physical conditions.
Solution Approach 2:
The patent creates a composite system by combining polyamide resin with specific additives and controlling the molecular structure to achieve both mechanical strength and transparency. The composite approach allows integrating the benefits of strong intermolecular hydrogen bonding with optical clarity.
2Strength
If amide repeating units are formed to improve scratch resistance through hydrogen bonds, then surface hardness is improved, but transparency deteriorates due to increased crystallinity and haze
Solution Approach 1:
The patent carefully controls the parameter of crystallinity by selecting specific polyamide resin structures that maintain adequate scratch resistance through hydrogen bonding while limiting excessive crystallinity formation. This balanced parameter control prevents haze development while preserving surface hardness.
3Ease of manufacture
If polymerization is performed in solvent to enable monomer reaction, then processability is improved, but molecular weight deteriorates due to solvent hybridization and moisture deterioration
Solution Approach 1:
The patent employs an inert atmosphere approach by using moisture-proofing agents and controlling the polymerization environment to prevent moisture deterioration. This creates a protected reaction environment that maintains high molecular weight while still allowing solvent-based processing.
Solution Approach 2:
The patent introduces moisture-proofing agents as intermediary substances that protect the polymerization process from moisture interference. These agents act as mediators between the solvent environment and the polymerization reaction, enabling both processability and high molecular weight achievement.
4Adaptability or versatility
If polyamide resin is exposed to ultraviolet irradiation, then application versatility is improved for outdoor use, but color stability deteriorates due to light-induced degradation
Solution Approach 1:
The patent converts the harmful effect of ultraviolet irradiation into a beneficial outcome by incorporating UV stabilizers that actively prevent degradation. These stabilizers absorb UV energy and dissipate it harmlessly, transforming the potential harm into a protected state that enables outdoor application while maintaining color stability.
Solution Approach 2:
The patent introduces UV stabilizers as intermediary substances that mediate between ultraviolet irradiation and the polyamide resin structure. These intermediaries absorb and neutralize UV damage before it can cause color degradation, enabling outdoor use while preserving color stability.
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 polyamide resin film exhibits excellent light resistance and stable optical properties, maintaining colorlessness and transparency even under long-term UV exposure, expanding its application in cost-effective and efficient uses.
Implementation Method 1
The amide structure induces intermolecular or intramolecular hydrogen bonds, resulting in improvement of scratch resistance by interactions such as hydrogen bonds.
Implementation Method 2
a polyamide resin film that can secure at least an adequate level of mechanical properties and excellent transparency while improving light resistance against long-term ultraviolet irradiation
Data Source
AI summary
The present invention relates to a polyamide resin film having improved light resistance by minimizing color difference variation rate due to long-term ultraviolet irradiation, and a resin laminate using the same.