COC-Blended Polyethylene Fabric for Pressure-Temperature Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional high density polyethylene (HDPE) fabrics experience significant stretching under stress and increased temperature, leading to loss of structural integrity, particularly in applications like irrigation hoses where pressure and temperature variations are common, causing potential bursting and water leakage.
Innovation Solution
A polyethylene fabric is developed by mixing HDPE with cyclic-olefin polymers (COCs) up to 40% by weight, which is then extruded to enhance stress and strain characteristics, maintaining structural integrity under varying pressures and temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional HDPE fabric is used, then the fabric is lightweight and can be easily manufactured, but the fabric stretches significantly under stress and high temperature, losing structural integrity
Solution Approach 1:
The patent applies composite materials by combining HDPE with cyclic-olefin polymer (COC) in a blend ratio of up to 40% by weight. This composite approach allows the fabric to maintain the ease of manufacturing HDPE while gaining improved dimensional stability and resistance to stretching under stress and high temperature conditions.
2Temperature
If HDPE fabric is used in high temperature environments, then the fabric remains lightweight, but the stretching increases with temperature, causing potential bursting and water leakage
Solution Approach 1:
The patent applies parameter changes by modifying the polymer composition parameters - specifically blending HDPE with cyclic-olefin polymer (COC) at ratios up to 40% by weight. This compositional parameter change enables the fabric to maintain dimensional stability and resist stretching across a wider temperature range, from cold to high temperature environments.
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 improved HDPE fabric with COCs exhibits superior resistance to stretching and maintains structural integrity at higher pressures and temperatures, preventing water leakage and ensuring the fabric's durability in applications like irrigation hoses and tensioned building fabrics.
Implementation Method 1
mixing HDPE (typically in pellet form) with pellets of cyclic-olefin polymers (COCs) in a ratio of up to 40% by weight of the layer
Implementation Method 2
This mixture is then extruded in ways known to those skilled in the art
Data Source
AI summary
An improved polyethylene fabric comprises polyethylene fabric or yarn that is manufactured by mixing HDPE (typically in pellet form) with pellets of cyclic-olefin polymers (COCs) in a ratio of up to 40% by weight of the layer. This mixture is then extruded in ways known to those skilled in the art. The resulting HDPE has superior stress and strain characteristics over a wider range of pressures and temperatures than conventional HDPE. The improved polyethylene fabric of the present invention is useful in applications where structural integrity is required and where pressure and temperature are a factor. For example, improved HDPE scrims of the present invention can be used as the reinforcing structure for irrigation hose or building fabric.