Multilayer Hose Adhesion Layer for Diffusion Barrier Bonding
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Solution Overview
Problem
Existing multilayered tubes or hoses face challenges in maintaining a strong and durable bond between the force bearing sheath and the diffusion reducing sheath, especially under conditions of frequent bending, vibration, or pressure changes, leading to potential delamination and reduced longevity.
Innovation Solution
A multilayered tube or hose design that includes a force bearing sheath, a diffusion reducing sheath, and an adhesion promoting layer between them, composed of a specific mixture of acrylonitrile butadiene rubber, styrene butadiene rubber, carbon black, calcium magnesium carbonate, and other additives, to enhance bonding strength and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an adhesion promoting layer is added between the force bearing sheath and diffusion reducing sheath, then the bonding strength and durability are improved, but the device complexity increases
Solution Approach 1:
An adhesion promoting layer is introduced as an intermediary between the force bearing sheath and the diffusion reducing sheath. This intermediate layer specifically addresses the bonding interface problem by providing enhanced adhesion properties, preventing delamination under dynamic conditions without requiring fundamental changes to the sheath materials themselves.
Solution Approach 2:
The adhesion promoting layer is formulated as a composite material containing rubber particles (10-50 parts by weight per 100 parts by weight of polyester resin), which combines the adhesion properties of rubber with the structural properties of polyester resin. This composite approach enables the layer to simultaneously provide flexibility, bonding strength, and durability.
2Duration of action of stationary object
If a multilayered structure with adhesion promoting layer is used, then the longevity and resistance to delamination are improved, but the manufacturing complexity increases
Solution Approach 1:
The adhesion promoting layer is pre-formulated with specific compositional ratios (polyester resin, plasticizer, rubber particles, fillers, curing agents) that are optimized for bonding performance. This preliminary preparation of the layer composition ensures that when the multilayered structure is manufactured, the bonding interface is already optimized for long-term durability and resistance to delamination under dynamic conditions.
Solution Approach 2:
The adhesion promoting layer utilizes specific parameter ranges to optimize both manufacturing and performance: rubber particle content (10-50 parts per 100 parts resin), plasticizer content (5-20 parts per 100 parts resin), and specific filler combinations. These parameter specifications enable consistent manufacturing while ensuring long-term bonding strength and longevity.
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 proposed design significantly increases the bonding force and longevity of the connection between the diffusion reducing sheath and the force bearing sheath, reducing the risk of delamination and extending the lifespan of the multilayered tube or hose.
Implementation Method 1
an adhesion promoting layer that is arranged between the force bearing sheath and the diffusion reducing sheath and that increases the bonding force between the force bearing sheath and the diffusion reducing sheath
Data Source
AI summary
The disclosure relates to a multilayered hose (1, 10) with a plurality of coaxially arranged sheaths (2, 3, 4, 5, 6, 7, 8, 12, 13). The multilayered hose (1, 10) includes at least a force bearing sheath (2, 6), a diffusion reducing sheath (4), and an adhesion promoting layer (3, 5) that is arranged between the force bearing sheath (2, 6) and the diffusion reducing sheath (4) and that increases the bonding force between said force bearing sheath (2, 6) and said diffusion reducing sheath (4). The adhesion promoting layer (3, 5) includes a mixture of: 65 to 85 parts of acrylonitrile butadiene rubber, 15 to 35 parts of styrene butadiene rubber, 75 to 125 parts of carbon black N990, 30 to 100 parts of calcium magnesium carbonate, 5 to 15 parts of zinc oxide, 5 to 20 parts of magnesium-aluminium hydroxycarbonate, 25 to 125 parts of resin package blend, 2 to 10 parts of N-(1.3-dimethylbutyl)-N′-phenyl-p-phenylendiamine, 5 to 15 parts of triallyl cyanurate, and 0.5 to 5 parts of a vulcanizing agent.