Transparent Resin Surface Roughness for Infrared Type Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods struggle to determine the resin type of transparent resins using infrared rays due to their ability to transmit most parts of the infrared light, necessitating additional apparatuses and processes for sorting.
Innovation Solution
A resin determination apparatus and method that processes the surface of transparent resins to achieve an arithmetic mean roughness of at least 0.025 µm in at least 50% of the irradiation area, allowing for accurate infrared-based resin type identification by reflecting and absorbing infrared light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If transparent resin is used, then light transmission is improved, but infrared light absorption is worsened
Solution Approach 1:
The patent changes the surface roughness parameter of the transparent resin to at least 0.025 µm in at least 50% of the irradiation area. This parameter modification enables the resin surface to reflect infrared light effectively, allowing accurate resin type determination while maintaining the transparent resin's inherent light transmission properties.
2Adaptability or versatility
If multiple sorting apparatuses are used, then sorting capability is improved, but device complexity is worsened
Solution Approach 1:
The patent enables a single infrared-based determination apparatus to handle transparent resins by incorporating surface roughness processing capability. This universal approach allows one apparatus to perform resin type determination on various resin types including transparent resins, eliminating the need for multiple specialized sorting apparatuses.
3Measurement precision
If surface roughness is increased, then infrared light reflection is improved, but manufacturing complexity is worsened
Solution Approach 1:
The patent specifies a measurable surface roughness parameter (at least 0.025 µm) that can be achieved through standard surface processing techniques. This parameter specification provides clear manufacturing guidance while enabling effective infrared light reflection for accurate resin type determination.
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
Enables precise determination of transparent resin types using infrared light, reducing the need for multiple sorting apparatuses and expanding the range of collectable transparent resin types.
Implementation Method 1
it has been found that a determination can be made on a transparent resin by detecting light scattered by the resin
Implementation Method 2
utilizing the light absorbing properties in an infrared region based on molecular structures of the resin
Data Source
Figure 1
Figure 2A~2C
Figure 2D~2E
AI summary
Lower surface 2c or upper surface 2d of object to be sorted 2 is processed such that arithmetic mean roughness Ra is not less than 0.025 µm in not less than 50% of lower surface 2c or upper surface 2d, object to be sorted 2 is irradiated with infrared light, and reflected light 4 from lower surface 2c or upper surface 2d of object to be sorted 2 is received, thereby determining a resin type of object to be sorted 2 on the basis of a reflection or absorption spectrum of object to be sorted 2 obtained from reflected light 4.