Coolant Hose Laminate With Polyamide Barrier for Low Diffusion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Reinforced polyurethane hoses used in injection molding machines experience unacceptable diffusion behavior due to increasing thermal loads, leading to longer maintenance times, downtimes, and potential machine failures, while thermally resilient silicone hoses are expensive and also inadequate in diffusion resistance.
Innovation Solution
A hose with a polyurethane base layer and a reinforcement layer, where the inner surface is protected by a polyamide diffusion barrier layer welded via thermal coextrusion, enhancing diffusion resistance and allowing higher pressures and flow rates, and featuring a polymeric protective layer for improved flexibility and media resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforced polyurethane hoses are used for coolant transport, then flexibility and mechanical strength are improved, but diffusion resistance deteriorates under thermal loads
Solution Approach 1:
The hose combines polyurethane base layer with polyamide reinforcement layer and silicone protective layer, creating a composite structure where each material contributes its superior properties: polyurethane provides flexibility, polyamide provides diffusion barrier, and silicone provides thermal resistance and wear protection
Solution Approach 2:
The hose is divided into distinct functional layers: inner polyamide diffusion barrier layer, middle polyurethane base layer for flexibility, and outer silicone protective layer for thermal and mechanical protection, with each layer performing its specific function
2Temperature
If thermally resilient silicone hoses are used, then thermal resistance is improved, but diffusion resistance and cost deteriorate
Solution Approach 1:
The hose is divided into distinct functional layers: inner polyamide diffusion barrier layer, middle polyurethane base layer for flexibility, and outer silicone protective layer for thermal and mechanical protection, with each layer performing its specific function
Solution Approach 2:
The hose combines polyurethane base layer with polyamide reinforcement layer and silicone protective layer, creating a composite structure where each material contributes its superior properties: polyurethane provides flexibility, polyamide provides diffusion barrier, and silicone provides thermal resistance and wear protection
3Loss of substance
If hose wall thickness is increased to reduce diffusion, then pressure resistance is improved, but flexibility and bending radius deteriorate
Solution Approach 1:
The hose combines polyurethane base layer with polyamide reinforcement layer and silicone protective layer, creating a composite structure where each material contributes its superior properties: polyurethane provides flexibility, polyamide provides diffusion barrier, and silicone provides thermal resistance and wear protection
Solution Approach 2:
The hose is divided into distinct functional layers: inner polyamide diffusion barrier layer, middle polyurethane base layer for flexibility, and outer silicone protective layer for thermal and mechanical protection, with each layer performing its specific function
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 significantly reduces coolant loss, prevents optical impairments, enables higher pressure handling, and increases the hose's service life and cooling effectiveness, allowing its use in more powerful systems with improved flexibility and media resistance.
Implementation Method 1
a diffusion barrier layer (3) made of polyamide, wherein the support layer (1) is welded on the inside to the diffusion barrier layer (3)
Implementation Method 2
The connection between these two layers is preferably achieved by thermal welding, for example by means of coextrusion
Data Source
Figure 1~2
AI summary
The invention relates to a hose, in particular a coolant hose for plant and equipment construction, for transporting a fluid (F) with a polyurethane-containing support layer (1) and a reinforcing layer (2) surrounding the support layer (1). According to the invention, the support layer (1) is welded on the inside to a polyamide-containing diffusion barrier layer (3).