High Concentration Pelletized Additive Concentrates for Polymer Processing
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Solution Overview
Problem
Existing methods for adding polymer additives face challenges such as difficulty in handling and feeding powdered additives, potential health, fire, and explosion risks, and issues with melting and viscosity behavior, leading to the need for low-concentration masterbatches that are costly and inefficient.
Innovation Solution
Development of high-concentration pelletized additive concentrates with primary polymer additives and carrier polymers, processed at temperatures below the melting point of the additives but above the carrier, allowing for efficient mixing and dispersion in molten polymers, reducing dusting and agglomeration, and enabling easier handling and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If powdered additives are added directly to the polymer stream, then the additive concentration can be high, but the handling and feeding becomes difficult and poses health, fire, and explosion risks
Solution Approach 1:
The patent changes the physical form of additives from powder to pelletized concentrate form, and controls the processing temperature to be below the melting point of the additive but above the carrier polymer melting point. This parameter change enables the additive to be processed in a stable solid state that is easy to handle and feed while maintaining high concentration.
Solution Approach 2:
The patent creates a composite material system consisting of the polymer additive combined with a carrier polymer in a pelletized concentrate form. This composite structure allows the additive to be encapsulated or mixed with the carrier at high concentrations while maintaining physical stability and ease of handling as pellets rather than loose powder.
2Productivity
If powdered additives are fed to a side-arm extruder, then direct addition to molten polymer is possible, but the melting and viscosity behavior of additives creates processing issues
Solution Approach 1:
The patent introduces a carrier polymer as an intermediary substance that facilitates the processing of the additive. The carrier polymer acts as a medium that can be melted and processed at lower temperatures, carrying the additive through the extrusion process without requiring the additive itself to melt, thus resolving the viscosity and melting behavior problems.
Solution Approach 2:
The patent changes the processing temperature parameter to be below the melting point of the additive but above the melting point of the carrier polymer. This temperature parameter change allows the carrier to melt and flow while the additive remains in a stable solid state, eliminating the melting and viscosity issues that would occur if the additive itself were melted.
3Ease of operation
If low concentration masterbatches are used to avoid handling issues, then safety and handling improve, but the cost increases and efficiency decreases
Solution Approach 1:
The patent changes the concentration parameter from low to high by using a carrier polymer system that allows stable handling of high concentration formulations. The key is maintaining the temperature below the additive melting point while above the carrier melting point, which enables high concentration without the handling problems of loose powder.
Solution Approach 2:
The patent creates a high-concentration composite masterbatch where the additive is combined with a carrier polymer in pelletized form. This composite structure provides the safety and handling benefits of a solid pellet while achieving high additive concentrations that improve productivity and reduce costs compared to low-concentration formulations.
4Stability of the object's composition
If additives are processed above their melting point, then mixing and dispersion is improved, but dusting and agglomeration occur
Solution Approach 1:
The patent inverts the temperature parameter relationship by processing below the additive melting point but above the carrier polymer melting point. This parameter change allows the carrier to melt and provide excellent mixing and dispersion of the additive particles, while the additive itself remains in a stable solid state that prevents dusting and agglomeration.
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 results in highly concentrated, dust-free additive blends that can be easily conveyed and fed to extruders, significantly reducing costs by achieving up to four times the concentration of traditional masterbatches while maintaining additive functionality and stability.
Implementation Method 1
processed at temperatures below the melting point of the additives but above the carrier
Implementation Method 2
allowing for efficient mixing and dispersion in molten polymers
Data Source
AI summary
High concentration pelletized additive concentration or polymer stabilization agent or blends, and their preparations, used in various polymerization processes to enhance stability.