Polypropylene Cellular Material Insulation Density
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Solution Overview
Problem
There is a need for polymeric materials that can be formed into insulated containers while maintaining non-aromatic properties, as existing materials may not provide adequate insulation or may have aromatic compounds that are undesirable.
Innovation Solution
A polymeric material comprising a blend of polymeric resins and cell-forming agents, specifically polypropylene resin and cell-forming agents like chemical nucleating agents and physical blowing agents, is used to create an insulative cellular non-aromatic polymeric material. This material is formed through an extrusion process that introduces a blowing agent into the molten resin, resulting in a lightweight, insulative product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional polymeric materials are used to form containers, then the containers can be manufactured, but they do not provide adequate insulation or contain aromatic compounds
Solution Approach 1:
The patent changes the physical and chemical parameters of the polymeric material by using specific polypropylene resins with controlled molecular weight and composition, along with specific cell-forming agents, to achieve both insulation and non-aromatic properties simultaneously
Solution Approach 2:
The patent creates a composite polymeric material by blending polypropylene resin with cell-forming agents (both chemical and physical) to produce a foamed structure that provides insulation while maintaining non-aromatic composition
2Temperature
If cell-forming agents are added to polymeric resin to create cellular structure, then insulation is improved, but the complexity of material formulation increases
Solution Approach 1:
The patent combines both chemical and physical cell-forming agents in a single formulation with the polypropylene resin, allowing the material to be processed in a single extrusion step without requiring separate processing stages for cell formation
Solution Approach 2:
The patent optimizes the concentration ratios of different cell-forming agents and resin components to achieve the desired cellular structure and insulation properties while maintaining manageable formulation complexity
3Temperature
If the polymeric material density is reduced to improve insulation, then the insulation performance increases, but the structural strength may be compromised
Solution Approach 1:
The patent controls the density parameter by selecting specific polypropylene resin molecular weights and cell-forming agent concentrations to achieve a density of 0.4-0.6 g/cm³ while maintaining adequate structural strength through optimized cellular structure
Solution Approach 2:
The patent creates a composite structure with optimized cell size, distribution, and wall thickness ratios that provides both low density for insulation and sufficient structural integrity for container applications
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 resulting insulative cellular non-aromatic polymeric material achieves a density of less than 0.6 grams per cubic centimeter, providing effective insulation while maintaining a non-aromatic composition, suitable for forming insulated containers such as cups or bottles.
Implementation Method 1
A physical blowing agent in the form of an inert gas is introduced into a molten resin before the tubular extrudate is formed
Implementation Method 2
The cell-forming agents include at least one of the following, a chemical nucleating agent and a physical blowing agent
Implementation Method 3
a polypropylene-based formulation in accordance with the present disclosure is heated and extruded to produce a tubular extrudate
Data Source
AI summary
A formulation for producing a polymeric material including polypropylene, a chemical blowing agent, and optional components as described.