Oriented Polypropylene Net Assembly for Oil Capture
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Solution Overview
Problem
Conventional oil adsorption technologies, such as polypropylene 'sock' designs, are limited by single-use capability, require external jackets for structural integrity, and generate significant waste, leading to high disposal costs and environmental impact.
Innovation Solution
A lightweight, oriented polypropylene netting assembly with a bow tie or tubular configuration, made by folding and crimping layers of biaxially oriented netting, which captures and contains oil without an external jacket, allowing for multiple reuses and efficient oil removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If polypropylene pellets or pieces are placed within an outer shell or jacket to form a sock design, then the adsorbent material is contained and provides structural integrity, but the sock has a defined shape and size that prevents expansion or contraction with water current or wave action
Solution Approach 1:
The invention replaces the rigid outer shell or jacket with a flexible netting structure made of polypropylene. This netting structure allows the adsorbent material to expand and contract with water current and wave action while still providing containment and structural support. The flexible nature of the netting enables adaptation to varying water conditions without compromising the integrity of the oil spill containment system.
2Quantity of substance
If adsorbent or absorbent material is placed within an outer jacket to capture oil, then oil capture capability is provided, but the quantity of refuse to be disposed of accumulates quickly in the event of a large oil spill
Solution Approach 1:
The invention enables recovery and reuse of the polypropylene netting assembly after oil capture. Instead of disposing of single-use socks or jackets, the netting structure can be removed from the water, the oil can be extracted or allowed to evaporate, and the netting can be reused for subsequent oil spill containment. This significantly reduces the accumulation of refuse and disposal costs while maintaining effective oil capture capacity.
3Strength
If an outer jacket or shell is used to contain the adsorbent or absorbent material, then structural integrity is provided, but the quantity and complexity of materials increases
Solution Approach 1:
The invention merges the functions of the outer jacket and the adsorbent material into a single integrated polypropylene netting structure. The netting itself serves as both the containment structure and the oil-capturing medium, eliminating the need for separate outer shells or jackets. This reduction in material complexity simplifies deployment and reduces the quantity of materials required while maintaining structural integrity and oil capture effectiveness.
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 oriented netting assembly captures and contains oil up to 20-25 times its initial weight initially, and 15-16 times per subsequent use, while being environmentally friendly and cost-effective, with improved adaptability to water conditions and oil retention capabilities.
Implementation Method 1
Polypropylene is used in the oil adsorption industry for its inherent affinity for capturing and containing oil
Implementation Method 2
The layers of oriented netting are buoyant and have a specific gravity to remain adjacent the contaminated water surface
Data Source
AI summary
A light weight oriented net or netting assembly is provided for oil capture and containment. The netting assembly is made by biaxially stretching or orienting starting materials to form a pattern of oriented strands and integral junctions that, while being light in weight, is also strong enough to be used to capture and remove oil from contaminated water without an outer stabilizing jacket. The assembly is preferably made from oriented polypropylene netting that is folded, gathered, bunched and/or otherwise layered upon itself on the order of 16-64 times and then crimped in one or more locations to secure the netting layers in a bow tie or tubular configuration that forms net cavities and an open cell structure to capture and contain oil that has been dispersed in water. Oil in the netting assembly can then be removed, such as by pressing or other removal process, after which the netting assembly may be reused.