Tri-Component Lubricant System for Polymer Extrusion
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Solution Overview
Problem
Current compositions and processes in the plastics industry fail to meet the requirements of low viscosity, high additive loading, and improved process characteristics during the extrusion of polymers, leading to inefficiencies in production and mechanical properties of polymeric articles and profiles.
Innovation Solution
The use of a combination of propylene-olefin-copolymer wax, montan wax or amide wax, and a metal salt of a C10-20 fatty acid in joint extrusion with an organic polymer, forming a masterbatch or compound, which provides improved process characteristics and mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional compositions are used in extrusion, then the process can be maintained with standard parameters, but the viscosity remains high and throughput is limited
Solution Approach 1:
The patent employs a composite lubricant system combining three distinct components: a polyolefin wax (first component), a montan wax or amide wax (second component), and a metal soap of C10-20 fatty acid (third component). This multi-component composite approach creates synergistic effects that reduce viscosity and torque more effectively than single or dual-component systems, enabling higher throughput while maintaining processability
Solution Approach 2:
The patent optimizes specific parameter ranges for each component to achieve the desired balance between viscosity reduction and processability. The first component is used at 0.1-5 wt%, the second at 0.1-5 wt%, and the third at 0.01-1 wt%. These controlled parameter changes ensure the composition provides sufficient lubrication to reduce torque and viscosity without compromising the structural integrity of the polymer matrix
2Productivity
If higher additive loading is used, then throughput and process efficiency improve, but the dispersion and compatibility of additives deteriorate
Solution Approach 1:
The patent applies local quality by assigning specific functional roles to each lubricant component. The polyolefin wax provides base lubrication and compatibility with the polymer matrix, the montan wax or amide wax enhances boundary lubrication at high shear zones, and the metal soap provides additional lubrication and stabilizing effects. This differentiated functional assignment ensures that even at high total additive loading (up to 10 wt%), each component contributes optimally to both process efficiency and compositional stability
Solution Approach 2:
The polyolefin wax acts as an intermediary carrier that ensures uniform distribution and compatibility of the more polar montan wax and metal soap components within the polymer matrix. This intermediary approach prevents phase separation and maintains homogeneous dispersion even at high additive concentrations, resolving the contradiction between loading level and compositional stability
3Ease of operation
If viscosity is reduced for better processability, then extrusion pressure and torque decrease, but the mechanical properties of the final product may deteriorate
Solution Approach 1:
The patent carefully controls the concentration parameters of each lubricant component to achieve optimal viscosity reduction without excessive degradation of mechanical properties. The first component is limited to 0.1-5 wt%, the second to 0.1-5 wt%, and the third to 0.01-1 wt%. These constrained parameter ranges ensure sufficient processability improvement while maintaining the structural integrity and mechanical performance of the extruded profiles
Solution Approach 2:
The tri-component composite lubricant system provides a balanced approach where each component contributes differently to viscosity reduction and mechanical property preservation. The polyolefin wax maintains compatibility with the polymer matrix, the montan wax or amide wax provides boundary lubrication with minimal matrix disruption, and the metal soap offers additional lubrication while stabilizing the system. This composite strategy achieves better processability while minimizing adverse effects on impact strength, tensile strength, and heat distortion resistance
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
This combination results in reduced viscosity and torque during extrusion, allowing for higher additive loading and improved mechanical properties such as impact strength and heat distortion resistance, enhancing the production efficiency and quality of polymeric articles and profiles.
Implementation Method 1
The use of a combination of propylene-olefin-copolymer wax, montan wax or amide wax, and a metal salt of a C10-20 fatty acid in joint extrusion with an organic polymer... This combination results in reduced viscosity and torque during extrusion
Data Source
AI summary
The invention relates to the use of three components in the joint extrusion with an organic polymer OP in order to facilitate higher throughput in the production of polymeric articles and profiles in extruders; the first component being a propylene-olefin-copolymer wax; the second component being a montan wax, an amide wax or a polyolefin homopolymer wax, and the third component being a metal salt of a C10-20 fatty acid; the three components can also be used in form of a composition, the composition being in the form of a masterbatch or of a compound.