Stretched Polyolefin Materials Using Nano-Materials
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing polyolefin materials do not achieve high enough mechanical properties such as strength and stiffness when stretched, particularly when compared to co-extruded materials, and lack the ability to be stretched to high ratios without breaking.
Innovation Solution
Incorporating nano-materials, such as nucleating agents, into polyolefin materials and stretching them to a ratio of at least 16, which results in materials with an E-modulus of at least 17 GPa and strength of at least 400 MPa, allowing for improved mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polyolefin materials are stretched to high stretch ratios, then strength and stiffness are improved, but the materials break before reaching high stretch ratios
Solution Approach 1:
The patent introduces a masterbatch containing nucleating agents as an intermediary substance that mediates between the polyolefin matrix and the stretching process. This masterbatch acts as a catalyst that promotes heterogeneous nucleation during stretching, enabling the material to achieve high stretch ratios (≥16) without breaking by facilitating controlled crystallization at intermediate stages of deformation
Solution Approach 2:
The patent changes the chemical composition parameters of the polyolefin material by incorporating specific nucleating agents (such as sorbitol derivatives, metal salts, or organic compounds) in controlled amounts (0.1-10 wt%). This compositional parameter change fundamentally alters the material's crystallization behavior, allowing it to sustain the mechanical stresses required for high stretch ratios while maintaining structural integrity
2Strength
If co-extruded polyolefin materials are used to achieve high strength and stiffness, then mechanical properties are improved, but the process complexity and cost increase
Solution Approach 1:
The patent extracts and isolates the key functional component (nucleating agents) from the complex co-extrusion system into a separate masterbatch formulation. This allows single-extrusion processes to achieve co-extrusion-level performance by concentrating the essential strengthening mechanism in a removable, transferable additive package that can be applied to various base polyolefin materials
Solution Approach 2:
The patent creates a universal masterbatch solution that can be applied to multiple different polyolefin types (polyethylene, polypropylene, and their copolymers) to achieve high strength and stiffness. This single nucleating agent formulation serves multiple functions across different material systems, replacing the need for material-specific co-extrusion formulations and simplifying the overall manufacturing ecosystem
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 use of nano-materials in polyolefin materials enables stretching to higher ratios and achieves significantly improved mechanical properties, including E-modulus and tensile strength, surpassing previous technologies by allowing for materials with E-modulus up to 29 GPa and strength up to 860 MPa.
Implementation Method 1
the addition of certain additives, in particular nano-materials, such as nucleating agents, in combination with the polyolefins leads to products that can be stretched at much higher stretch ratios
Data Source
AI summary
The invention is directed to stretched polyolefin materials having an E-modulus of at least 17 GPa, preferably at least 20 GPa and a strength of at least 400 MPa, comprising a polyolefin and a nano-material, such as a nucleating agent, which material is obtainable by a process comprising a stretching step wherein the material is stretched at a stretch ratio of at least 16. The materials of the invention can be produced by a process comprising the steps of: providing a compound of a polyolefin material and a nano-material, e.g. a nucleating agent, wherein the nano-material is dispersed preferably on a molecular scale in the polyolefin material, extruding this compound, followed by a stretching step wherein the material is stretched to a total stretch ratio of at least 16.