Lubricated Polyamide Injection Molding Polymerization
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Solution Overview
Problem
Current methods for producing injection molded thermoplastic polyamides require high injection temperatures, leading to polymer degradation and increased energy costs, while also involving complex and costly steps for introducing lubricants, which complicates the production of articles with good mechanical properties and varied shapes.
Innovation Solution
The use of a lubricated polyamide, manufactured through a polymerization process involving a pressure distillation phase, decompression phase, finishing phase, and granulation phase, where a lubricant is introduced before the end of the finishing stage, allowing for the production of articles with satisfactory mechanical properties and reduced cycle times, and enabling the production of complex shapes at gentler molding temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If high injection temperatures are used to achieve good fluidity and complex shapes, then the ability to produce varied shapes is improved, but polymer degradation and energy costs increase
Solution Approach 1:
The patent introduces lubricants during the polymerization process to fundamentally change the rheological parameters of the polymer melt. This allows the polymer to achieve good fluidity at lower temperatures, enabling complex shape production without the harmful effects of high temperature degradation
Solution Approach 2:
The lubricant is incorporated into the polymer structure during the polymerization process itself, before the injection molding step. This preliminary action ensures the polymer has the desired lubrication properties built-in, eliminating the need for high temperatures during subsequent processing
2Shape
If high injection temperatures are used to achieve good fluidity, then the ability to produce varied shapes is improved, but energy costs increase
Solution Approach 1:
By modifying the polymer's rheological parameters through lubricant incorporation during polymerization, the process enables effective injection molding at reduced temperatures, directly lowering energy consumption while maintaining the ability to produce complex shapes
3Ease of operation
If lubricants are introduced by depositing on granules or adding to molten polymer, then the lubrication effect is achieved, but process complexity and costs increase
Solution Approach 1:
The patent merges the lubricant introduction step with the polymerization process itself. Instead of separate lubrication steps, the lubricant is incorporated during polymer granule formation, combining two operations into one and eliminating additional processing steps
Solution Approach 2:
The lubricant is introduced during the polymerization process, performing the lubrication function in advance before injection molding. This preliminary incorporation simplifies the overall process by eliminating subsequent lubrication steps
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 approach reduces polymer degradation, saves energy, increases productivity, and simplifies the production process by eliminating additional lubrication steps, while maintaining high non-breakage rates and flexibility in polymerization units, allowing for the production of articles with improved mechanical properties and complex shapes.
Implementation Method 1
it is essential for the injection molding application to have a lubricated polymer in order to promote the injection process and demolding
Implementation Method 2
a pressure distillation phase, a decompression phase
Implementation Method 3
a pressure distillation phase, a decompression phase
Data Source
AI summary
The invention relates to the use of thermoplastic polymers for the preparation of injection-moulded articles and to the resulting articles. More specifically, the invention relates to the use of a lubricated polyamide, obtained by means of the addition of at least one lubricant during the polyamide polymerisation method, for the preparation of injection-moulded articles.