Thermoplastic Resin Composition UV Absorbency Bending Strength
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Solution Overview
Problem
Current thermoplastic resins used in optical components, such as polycarbonate, face challenges in achieving high ultraviolet absorbency and bending strength while maintaining optical properties, especially in the context of miniaturized electronic devices where separate UV filters or coatings are undesirable due to cost and performance issues.
Innovation Solution
A thermoplastic resin composition is developed by incorporating a specific amount of ultraviolet absorbers, such as benzotriazole-based compounds, into the resin itself, which maintains bending strength and enhances UV absorbency, eliminating the need for separate UV filters or coatings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an ultraviolet absorber is kneaded into a resin itself, then ultraviolet absorbency is improved, but bending strength deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the amount of ultraviolet absorber added to the resin (0.01-5 parts by mass per 100 parts by mass of resin) and adjusting processing conditions (molding temperature, injection pressure, cooling time) to optimize both UV absorbency and bending strength. This quantitative parameter optimization resolves the contradiction by finding the optimal balance point where UV protection is sufficient while mechanical strength is maintained.
Solution Approach 2:
The patent creates a composite material system by combining the base resin (polycarbonate, polyester, or acrylic) with specifically formulated ultraviolet absorbers and, in some embodiments, nucleating agents. This composite approach allows the material to simultaneously exhibit UV absorbing properties while maintaining the mechanical integrity of the base resin, effectively resolving the strength deterioration issue.
2Object-affected harmful factors
If a separate ultraviolet cutting layer or filter is equipped into the optical lens unit, then ultraviolet absorbency is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the ultraviolet protection function directly into the optical lens material itself by incorporating ultraviolet absorbers during resin formulation. This integration eliminates the need for separate UV cutting layers or filters, thereby reducing device complexity while maintaining effective UV absorbency. The single-material solution combines optical clarity, UV protection, and mechanical strength in one component.
Solution Approach 2:
The patent makes the optical lens material multi-functional by embedding ultraviolet absorbing capabilities within the resin composition itself. The lens material simultaneously performs its primary optical function and UV protection function, eliminating the need for dedicated UV filtering components and simplifying the overall lens unit structure.
3Object-affected harmful factors
If a lens is coated with a resin comprising an ultraviolet absorber, then ultraviolet absorbency is improved, but processing complexity and cost increase
Solution Approach 1:
The patent applies preliminary action by pre-incorporating ultraviolet absorbers into the resin material during the resin formulation stage, before the lens manufacturing process. This advance preparation eliminates the need for subsequent coating operations, as the UV protection is already integrated into the material. The resin is ready for direct injection molding into final lens shapes without additional UV-coating steps.
Solution Approach 2:
The patent extracts the UV protection function from the manufacturing process by integrating it into the base material itself, rather than applying it as a separate coating step. This extraction of the UV function into the resin composition eliminates complex multi-step manufacturing processes, allowing for simplified one-step injection molding production.
4Weight of moving object
If electronic devices are miniaturized, then weight and size are reduced, but the requirement for integrated UV protection becomes more critical
Solution Approach 1:
The patent makes the optical lens material multi-functional to address miniaturization requirements. The resin composition simultaneously provides optical clarity, UV protection, and mechanical strength in a single integrated material, eliminating the need for additional separate UV protection components that would increase weight and complexity in miniaturized devices.
Solution Approach 2:
The patent merges multiple functions (optical performance, UV absorption, mechanical strength) into a single resin material system. This integration is particularly valuable for miniaturized electronic devices where space and weight are constrained, as it eliminates the need for multiple separate components and allows for compact, lightweight optical assemblies.
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 resin composition achieves high ultraviolet absorbency and bending strength, enabling the production of optical components with improved performance and cost-effectiveness, suitable for mass production through injection molding without compromising optical properties.
Implementation Method 1
a resin composition comprising a thermoplastic resin comprising a constituting unit (A) derived from a compound represented by the following general formula (1), wherein the resin composition comprises an ultraviolet absorber in an amount of 2,000 ppm to 40,000 ppm
Data Source
AI summary
The present invention provides a resin composition comprising a thermoplastic resin comprising a constituting unit (A) derived from a compound represented by the following general formula (1), whereinthe resin composition comprises an ultraviolet absorber in an amount of 2,000 ppm to 40,000 ppm: