Biodegradable Resin Composition Balancing Flexibility and Soil Breakdown
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Solution Overview
Problem
Existing biodegradable resins like PLA lack flexibility and mechanical properties, and PBAT has poor biodegradability and soil environment improvement limitations, especially when used for agricultural purposes.
Innovation Solution
A biodegradable resin composition comprising a biodegradable resin, an inorganic filler, and minerals such as iron, magnesium, manganese, and calcium, with a content of 30 wt% or more, and optionally a metal salt and anti-hydrolysis agent, to enhance biodegradability and soil fertility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If PBAT is used as biodegradable resin, then flexibility is improved, but mechanical properties and biodegradability time are insufficient
Solution Approach 1:
The patent creates a composite resin composition by combining PBAT (provides flexibility) with PLA (provides mechanical strength and biodegradability). This composite structure allows the material to simultaneously achieve both flexibility and improved mechanical properties while maintaining biodegradability characteristics from the PLA component.
2Strength
If inorganic filler is added to PBAT, then mechanical properties are improved, but biodegradation time and soil environment improvement are limited
Solution Approach 1:
The patent modifies the composition parameters by specifying precise ranges for inorganic filler content (1-20 parts by weight per 100 parts PBAT) and incorporating mineral nutrients (N, P, K) at controlled concentrations. This parameter optimization ensures that mechanical properties are enhanced while biodegradation time and soil improvement capabilities are maintained at acceptable levels.
Solution Approach 2:
The patent incorporates mineral nutrients (nitrogen, phosphorus, potassium) specifically to improve soil environment quality where the resin degrades. This localized quality enhancement ensures that the inorganic filler and additives serve dual purposes: providing mechanical strength during use and improving soil fertility during biodegradation, rather than solely focusing on mechanical properties.
3Adaptability or versatility
If biodegradable resin is used for agricultural purposes, then soil fertility is improved, but biodegradation time is insufficient
Solution Approach 1:
The patent incorporates mineral nutrients (nitrogen, phosphorus, potassium) and inorganic fillers into the resin composition before use. These components are pre-positioned within the resin structure to be released during biodegradation, ensuring that soil fertility improvement begins as soon as the resin starts decomposing, thereby reducing the effective biodegradation time needed for agricultural benefit.
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 composition improves biodegradability, reduces hydrolysis, prevents discoloration, and enhances soil fertility, allowing for efficient decomposition and soil acid neutralization, while maintaining mechanical properties.
Implementation Method 1
a high hydrolysis degree in water when discarded
Implementation Method 2
an inorganic filler; and one or more selected from the group consisting of iron, magnesium, manganese and calcium
Implementation Method 3
the anti-hydrolysis agent may include silicon
Data Source
AI summary
The present invention relates to a biodegradable resin composition and a biodegradable molded article comprising same. The biodegradable resin composition comprises: a biodegradable resin; an inorganic filler; and at least one selected from the group consisting of iron, magnesium, manganese, and calcium, wherein the amount of the inorganic filler is at least 30 wt % based on the total weight of the biodegradable resin composition.