Thermoplastic Resin Composition for Tunable Refractive Index Recycling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional thermoplastic resins used for optical applications often lack desired refractive indices and generate scrap pieces during molding, leading to low yield rates and environmental waste.
Innovation Solution
A method for producing a thermoplastic resin composition by mixing first and second thermoplastic resins with specific structural units, allowing for tailored refractive indices and facilitating recycling of scrap materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional thermoplastic resins are used for optical applications, then molding and processing can be performed, but the refractive index characteristics are not appropriate for the intended use
Solution Approach 1:
The patent creates a composite resin system by blending a polycarbonate resin (providing high refractive index ≥1.58) with a transparent resin having lower refractive index (1.40-1.55). This composite approach allows tailoring the overall refractive index to specific optical requirements while maintaining good optical properties and processability, thus resolving the contradiction between achieving precise refractive index characteristics and maintaining versatility for different applications.
Solution Approach 2:
The patent systematically varies the composition ratio between the polycarbonate resin and the transparent resin to adjust the refractive index of the final resin composition. By changing this parameter (composition ratio), the refractive index can be precisely controlled within a specific range, enabling the material to meet different optical application requirements while maintaining good moldability and optical properties.
2Productivity
If thermoplastic resins are molded and processed into products, then molded products can be produced, but scrap pieces are generated that cannot be easily recycled
Solution Approach 1:
The patent incorporates scrap pieces generated during injection molding into the resin composition itself. The scrap pieces, which would normally be discarded as waste, are reused as part of the raw material for producing new molded products. This recovering approach increases the overall yield rate and reduces material loss, directly addressing the contradiction between productivity and substance loss.
3Manufacturing precision
If high refractive index materials are used for optical applications, then desired optical characteristics can be achieved, but productization is not easily realized
Solution Approach 1:
The patent combines a high refractive index polycarbonate resin with a transparent resin of lower refractive index to create a composite material that achieves the desired optical characteristics while maintaining good processability. This composite approach allows the material to be easily manufactured and productized, resolving the contradiction between achieving high optical performance and ease of manufacture.
Data Source
AI summary
The present invention provides a thermoplastic resin composition production method with which it is possible to reliably produce a thermoplastic resin composition having desired properties, as well as facilitate thermoplastic resin recycling and reduce the environmental load. The problem is solved by the following thermoplastic resin composition production method. Specifically provided is a thermoplastic resin composition production method at least including a mixing step for mixing a first thermoplastic resin that includes a structural unit (A) derived from a monomer represented by any one of general formulas (1a) - (1c), and a second thermoplastic resin that includes a structural unit (B) derived from a monomer represented by general formula (2), wherein the refractive index of the first thermoplastic resin is 1.650 or less, the refractive index of the second thermoplastic resin is 1.570 or more, and the refractive index of the thermoplastic resin composition is 1.550-1.700.