Multilayer Fluid Hose Structure for Kink Resistance and Flexibility
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Solution Overview
Problem
Hoses for fluid transportation face challenges in maintaining flexibility while minimizing kinking and collapse when bent at small curvatures, as existing designs often compromise on kink resistance and barrier properties.
Innovation Solution
A hose structure comprising an inner layer of thermoplastic resin composition with a rubber domain, a reinforcing layer, and an outer rubber composition, where the ratio of 10% modulus to 100% modulus of the multilayer structure is optimized to achieve kink resistance and flexibility, with specific thickness ratios and materials used to suppress kinking and maintain barrier properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a hose is made flexible for handling, then ease of operation is improved, but kink resistance deteriorates
Solution Approach 1:
The hose is divided into multiple layers with distinct functions: an inner layer for flexibility and handling, an intermediate layer for barrier properties, and an outer layer for kink resistance. This segmentation allows each layer to optimize its specific function without compromising the others.
Solution Approach 2:
The hose uses composite material construction combining thermoplastic resin layers with rubber composition layers. The thermoplastic resin provides flexibility and barrier properties, while the rubber composition provides kink resistance and mechanical strength, creating a material system that achieves both flexibility and kink resistance simultaneously.
2Reliability
If a hose is made rigid to prevent kinking, then kink resistance is improved, but flexibility deteriorates
Solution Approach 1:
The hose is divided into multiple layers with distinct functions: an inner layer for flexibility and handling, an intermediate layer for barrier properties, and an outer layer for kink resistance. This segmentation allows each layer to optimize its specific function without compromising the others.
Solution Approach 2:
The hose uses composite material construction combining thermoplastic resin layers with rubber composition layers. The thermoplastic resin provides flexibility and barrier properties, while the rubber composition provides kink resistance and mechanical strength, creating a material system that achieves both flexibility and kink resistance simultaneously.
3Reliability
If a multilayer structure is used to improve barrier properties, then chemical liquid barrier properties are improved, but device complexity increases
Solution Approach 1:
The hose is divided into multiple layers with distinct functions: an inner layer for flexibility and handling, an intermediate layer for barrier properties, and an outer layer for kink resistance. This segmentation allows each layer to optimize its specific function without compromising the others.
Solution Approach 2:
Each layer in the multilayer structure serves multiple functions simultaneously. For example, the thermoplastic resin layers provide both barrier properties against chemical liquids and flexibility for handling, while also contributing to the overall structural integrity. This multi-functionality reduces the need for additional specialized components.
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 hose exhibits excellent kink resistance while maintaining flexibility and barrier properties, ensuring effective fluid transportation without leakage, as demonstrated by the evaluation of modulus, fuel transmission, and handling properties.
Implementation Method 1
a (A) layer including a thermoplastic resin composition ax made of a matrix am containing a thermoplastic resin ar and a domain ad containing a rubber ae
Implementation Method 2
a ratio M10 (AB)/M100 (AB) of a 10% modulus M10 (AB) to a 100% modulus M100 (AB) of a multilayer structure including the (A) layer and the (B) layer being more than 0.5 and less than 1.2
Implementation Method 3
sandwiching a layer of a thermoplastic resin having excellent barrier properties between a layer of a thermoplastic resin composition
Data Source
AI summary
A hose for fluid transportation includes an inner layer, a reinforcing layer, and an outer layer. The inner layer includes a (A) layer including a thermoplastic resin composition ax made of a matrix am containing a thermoplastic resin ar and a domain ad containing a rubber ae, a (B) layer including a thermoplastic resin b or a thermoplastic resin composition bx made of a matrix bm containing a thermoplastic resin br and a domain bd containing a rubber be, and a (C) layer including a rubber composition cx. The (A), (B) and (C) layers are arranged in this order as innermost to outer layers. A 10% modulus M10 to 100% modulus M100 ratio of the (A) and (B) layer structure satisfies 0.5<M10/M100<1.2. A 100% modulus of the (C) layer<a 100% modulus of the (A) layer<a 100% modulus of the (B) layer.