Flexible PVC Hose Structure Using Plant-Based Plasticizers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing multi-layered flexible hoses, particularly water hoses, do not meet sustainability requirements due to the use of fossil-based plasticizers, which can leach into fluid media and pose environmental and health risks.
Innovation Solution
A multi-layered flexible hose with a fluid channel and a hose wall composed of at least three layers, where the inner and outer layers of polyvinyl chloride (PVC) contain plant-based plasticizers, such as vegetable esters or vegetable oils, eliminating the need for fossil-based plasticizers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fossil-based plasticizers are used in PVC layers, then mechanical properties and flexibility are maintained, but environmental sustainability deteriorates and plasticizer washout occurs
Solution Approach 1:
The patent changes the chemical composition parameter of the plasticizer from fossil-based to plant-based origin while maintaining the functional properties. This substitution resolves the contradiction by eliminating harmful fossil-based substances while preserving the mechanical flexibility and performance characteristics required for hose operation.
Solution Approach 2:
The patent converts the potential harm of plasticizer washout by using plant-based plasticizers that are inherently more environmentally benign. Even when washout occurs, the environmental and health impacts are significantly reduced, transforming a harmful scenario into a beneficial or neutral one.
2Object-affected harmful factors
If plant-based plasticizers are used in PVC layers, then environmental sustainability is improved, but mechanical properties may deteriorate
Solution Approach 1:
The patent optimizes the parameters of plant-based plasticizers (composition, concentration, molecular structure) to achieve the desired balance between environmental sustainability and mechanical performance. By carefully selecting and adjusting these parameters, the hose maintains adequate strength and flexibility while using eco-friendly plasticizers.
Solution Approach 2:
The patent uses composite material structures with multiple layers where plant-based plasticized PVC is combined with other materials (such as fabric reinforcement layers or additional PVC layers) to compensate for any potential strength reductions. This composite approach ensures that environmental benefits are achieved without compromising overall mechanical integrity.
3Strength
If multiple layers are used in hose wall, then mechanical strength and resistance to washout are improved, but device complexity increases
Solution Approach 1:
The patent divides the hose wall into multiple functional layers, each with specific properties. The inner layer contains plant-based plasticized PVC for fluid contact and plasticizer retention, while the outer layer provides structural protection. This segmentation allows each layer to be optimized for its specific function, improving washout resistance without requiring excessive complexity throughout the entire structure.
Solution Approach 2:
The patent applies different material compositions and plasticizer concentrations to different layers based on their specific functional requirements. The inner layer uses plant-based plasticizers optimized for chemical stability and low washout, while the outer layer may have different properties optimized for mechanical strength and durability. This local optimization achieves high performance without uniform complexity.
Data Source
Figure 1
Figure 2
AI summary
A multi-layered flexible hose for conveying at least one fluid medium, wherein the hose has a fluid channel and a hose wall surrounding the fluid channel. The hose wall has a multi-layered structure and comprises at least three layers, with the following layer structure from the inside out: An inner layer of polyvinyl chloride is provided. Furthermore, a fabric layer and an outer layer of polyvinyl chloride are provided. The polyvinyl chloride of the inner layer and/or the outer layer contains at least one plant-based plasticizer.