Fuel Hollow Structure With Conductive Fluororesin and Adhesion Layering
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Solution Overview
Problem
Hollow structures for fuel transportation require improved fuel barrier properties and low-temperature impact resistance, with the challenge of achieving interlayer adhesion and conductivity using a fluororesin conductive layer that adheres well to polyamide resin layers, while maintaining cost-effectiveness.
Innovation Solution
A multilayer structure comprising a polyamide resin layer, a modified polyamide resin layer, and a conductive fluororesin layer, where the polyamide resin layers contain specific structural units and a polyolefin content, and the conductive layer includes a fluororesin and conductive substance, ensuring excellent adhesion and barrier properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fluororesin conductive layer is added to achieve conductivity, then electrical conductivity is improved, but interlayer adhesion deteriorates due to poor bonding between fluororesin and polyamide resin
Solution Approach 1:
The patent introduces an intermediary layer between the fluororesin conductive layer and the polyamide resin barrier layer. This intermediary layer acts as a mediator that bonds to both materials, solving the adhesion problem while maintaining the electrical conductivity function of the fluororesin layer and the barrier function of the polyamide layer.
Solution Approach 2:
The patent creates a composite structure consisting of multiple layers with different functions: a fluororesin layer for conductivity, a polyamide resin layer for barrier properties, and an intermediary layer for bonding. This composite approach allows each layer to optimize its specific function while the overall structure achieves both conductivity and strong interlayer adhesion.
2Reliability
If polyamide resin layers are used to ensure fuel barrier properties, then fuel barrier performance is improved, but adhesion to fluororesin conductive layer deteriorates
Solution Approach 1:
The intermediary layer serves as a bridge between the polyamide resin barrier layer and the fluororesin conductive layer. It maintains the fuel barrier properties of the polyamide layer while providing effective bonding to the fluororesin layer, thus resolving the adhesion issue without compromising barrier performance.
Solution Approach 2:
The patent applies local quality by having different layers with specialized functions: the polyamide resin layer provides fuel barrier properties in its specific region, while the intermediary layer provides bonding functionality at the interface, and the fluororesin layer provides conductivity. Each layer optimizes its local function without interfering with others.
3Reliability
If multilayer structure is implemented to achieve both barrier and conductive functions, then functional performance is improved, but structural complexity increases
Solution Approach 1:
The patent segments the hollow structure into distinct functional layers: a fluororesin conductive layer, a polyamide resin barrier layer, and an intermediary bonding layer. This segmentation allows each layer to be optimized for its specific function while maintaining overall structural integrity and managing complexity through clear functional division.
Solution Approach 2:
The intermediary layer serves multiple functions simultaneously: it provides adhesion between the fluororesin and polyamide layers, maintains structural integrity, and allows the overall structure to achieve both conductivity and barrier properties. This multi-functionality reduces the need for additional separate 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 solution provides a hollow structure with enhanced fuel barrier properties, low-temperature impact resistance, and interlayer adhesion, effectively addressing the challenges of fluororesin adhesion and conductivity while maintaining cost-effectiveness.
Implementation Method 1
hollow structures such as tubes, hoses and pipes used in applications such as fuel transportation are required to have high gas barrier properties for the purpose of suppressing volatile components such as volatile hydrocarbon atoms from permeating and diffusing into the atmosphere
Implementation Method 2
In order to achieve conductivity, it is conceivable to provide a conductive layer using a fluororesin containing a conductive substance as a conductive material
Implementation Method 3
an acidic functional group that chemically bonds with the polyamide resin is generally added to the fluororesin for improving the adhesion between the polyamide resin layer and the fluororesin layer (conductive layer) during co-extrusion
Data Source
AI summary
Provided is a hollow structure for fuel, in which a conductive layer containing a fluororesin is used; that is excellent in fuel barrier properties and low-temperature impact resistance, and further is excellent in interlayer adhesion,The hollow structure for fuel includes a polyamide rein layer (A) a polyamide resin layer (B), a polyamide resin layer (C), and a conductive layer (D) in this order from an outside. The polyamide resin layer (A) contains a polyamide resin (a). The polyamide resin layer (B) contains a polyolefin, a polyamide resin (b1) containing a structural unit derived from metaxylylenediamine and a structural unit derived from an aliphatic dicarboxylic acid having from 4 to 8 carbon atoms, and a polyamide resin (b2) containing a structural unit derived from xylylenediamine and a structural unit derived from an aliphatic dicarboxylic acid having from 9 to 12 carbon atoms. The polyamide resin layer (C) contains a polyamide resin (c). The conductive layer (D) contains a fluororesin and a conductive substance.