Biodegradable Irrigation Pipe Core Layer Design
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Solution Overview
Problem
Conventional irrigation pipes made from non-biodegradable petroleum-based plastics contribute to environmental pollution and increasing raw material costs, as they are not readily recyclable and are often discarded after becoming inefficient.
Innovation Solution
A biodegradable irrigation pipe with a core layer made from renewable materials like PLA and protected by non-degradable layers that break down upon exposure to water, soil, or mechanical stress, allowing the pipe to degrade rapidly and be composted, adhering to European norm EN 13432 for compostability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional non-biodegradable petroleum-based plastics are used for irrigation pipes, then mechanical strength and durability are maintained throughout the growing season, but environmental pollution increases and raw material costs rise due to discarded pipes not being readily recyclable
Solution Approach 1:
The pipe is divided into multiple functional layers: a biodegradable core layer that degrades after use, and protective outer layers that maintain mechanical strength during operation. This segmentation allows different parts of the pipe to serve different functions - structural integrity during use and environmental friendliness after disposal.
Solution Approach 2:
The pipe uses composite material construction combining biodegradable materials (such as starch-based polymers or polyhydroxyalkanoates) with protective coatings. This composite structure enables the pipe to exhibit both the mechanical properties needed for irrigation duty and the biodegradability required for environmental sustainability.
2Duration of action of stationary object
If biodegradable materials are used for the core layer, then the pipe degrades rapidly after use reducing pollution, but the pipe may lose mechanical strength before the end of the growing season
Solution Approach 1:
Protective layers are applied to the biodegradable core layer before the pipe is put into service. These protective layers prevent premature degradation by shielding the core from environmental factors such as moisture and microorganisms, ensuring the pipe maintains its structural integrity throughout the intended growing season.
Solution Approach 2:
The degradation rate of the biodegradable core layer is controlled by adjusting material composition, thickness, and protective layer characteristics. This parameter optimization ensures the pipe degrades at the appropriate time - maintaining strength during the growing season while enabling rapid degradation afterward to meet environmental standards.
3Ease of operation
If the pipe is made sufficiently thin to be easily broken up by conventional agricultural equipment, then disposal effort is reduced, but mechanical strength and durability during the growing season are compromised
Solution Approach 1:
The pipe structure is segmented into a thin biodegradable core layer and protective outer layers. The core layer can be easily broken up by agricultural equipment, while the protective layers maintain structural integrity during operation. This segmentation enables both easy disposal and adequate strength during use.
Solution Approach 2:
Different parts of the pipe have different thicknesses and material properties optimized for their specific functions. The core layer is thin and biodegradable for easy disposal, while the protective layers are thicker and more durable for mechanical strength during operation. This local quality differentiation resolves the contradiction between ease of disposal and mechanical strength.
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 biodegradable irrigation pipe effectively reduces environmental pollution by decomposing after use, facilitating easy disposal and recycling, while maintaining mechanical strength and functionality throughout the growing season, with an estimated 90% biodegradation within six months after layer breach.
Implementation Method 1
the core layer is formed from a biodegradable material, which degrades relatively quickly when exposed to degrading elements such as water, wet soil and/or heat
Implementation Method 2
the core layer provides body and mechanical strength to the irrigation pipe and is formed from a biodegradable material, which degrades relatively quickly
Data Source
Figure 1~2
AI summary
An irrigation pipe having a wall comprising: a core layer formed from a biodegradable material; and at least one relatively non-biodegradable protective layer formed on the core layer.