Biodegradable Polyester Particle Substrate Treatment
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Solution Overview
Problem
Existing substrate treatment methods using solid particles face challenges in biodegradability and reusability, with conventional biodegradable particles often becoming unusable after a few cycles due to molecular weight degradation, and lacking effective separation from substrates.
Innovation Solution
The method employs biodegradable polyester particles with a controlled number-average molecular weight of 10,000 to 500,000 Daltons, combined with inorganic fillers, to enhance biodegradability and reusability, allowing for multiple treatment cycles while maintaining mechanical robustness and efficient separation from substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If biodegradable polyester particles are used to improve biodegradability, then environmental friendliness is improved, but the particles become unusable after a few cycles due to molecular weight degradation
Solution Approach 1:
The patent applies parameter changes by precisely controlling the number-average molecular weight of the biodegradable polyester to fall within the specific range of 10,000 to 500,000 Daltons. This parameter optimization allows the particles to maintain sufficient mechanical strength and structural integrity for multiple treatment cycles while still being capable of biodegradation in the natural environment, thereby resolving the contradiction between reusability and biodegradability
2Productivity
If solid particles are used for cleaning and treatment, then cleaning effectiveness is improved, but separation of particles from substrate becomes difficult
Solution Approach 1:
The patent applies local quality by creating particles with specific local characteristics - a core-shell structure where the outer shell has properties optimized for separation (such as different density or surface characteristics) while the inner core maintains the functional properties for cleaning. This allows the particle to effectively perform cleaning functions while enabling easy separation from the substrate through methods such as filtration or density-based separation
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
This approach enables the particles to be reused multiple times while ensuring effective biodegradation, reducing water consumption and environmental impact, and providing superior cleaning performance comparable to non-biodegradable alternatives.
Implementation Method 1
biodegradable polyester... break down after their intended purpose to yield natural by-products... biodegradation produces lactic acid
Data Source
AI summary
A method of treating a substrate comprising a first step of agitating a composition comprising solid particles comprising biodegradable polyester having a number-average molecular weight of from 10,000 Daltons to 500,000 Daltons, said solid particles having a size of from 0.1mm to 100mm; a liquid medium; and the substrate, and a second step comprising separating the solid particles from the substrate.