Continuous Polymer Melt Processing Without Reactor Rebuilding
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Solution Overview
Problem
Current methods for processing multiple terephthalate polyester melts are inefficient, requiring reactor rebuilding for each melt, which is costly and time-consuming, limiting the ability to process different terephthalate copolyester melts simultaneously.
Innovation Solution
A continuous method for combined processing of terephthalate polyester melts, including those comprising terephthalate polyester, copolyester based on terephthalic acid and aliphatic dicarboxylic acid, and copolyester based on terephthalic acid and polytetramethylene glycol, allowing for the production of pellets, fibers, expanded particles, preforms, and articles without the need for reactor rebuilding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If reactor rebuilding is performed for each terephthalate polyester melt, then processing of different polymer melts is achieved, but processing time and costs increase
Solution Approach 1:
The patent applies universality by enabling a single reactor to process multiple types of terephthalate polyester melts (M1, M2, and M3) without requiring reactor rebuilding. The reactor is designed to handle different polymer compositions continuously, making it a multi-functional processing unit that can switch between processing different melts through alternating feed introduction rather than physical reconstruction
Solution Approach 2:
The patent implements continuity of useful action by establishing a continuous processing method where different terephthalate polyester melts are alternately introduced into the reactor in a continuous manner. This eliminates the downtime associated with reactor rebuilding and maintenance between different polymer processing runs, maintaining continuous productive operation
2Adaptability or versatility
If reactor rebuilding is performed for each terephthalate polyester melt, then processing of different polymer melts is achieved, but processing costs increase
Solution Approach 1:
The reactor is designed with universal capability to process multiple terephthalate polyester melt types (M1 containing polyester A1, M2 containing copolyester A2 with aliphatic dicarboxylic acid, and M3 containing copolyester A3 with polytetramethylene glycol) without requiring costly reactor rebuilding or modification between different polymer processing runs
Solution Approach 2:
The continuous alternating processing method eliminates the costly downtime and operational disruptions associated with reactor rebuilding, maintaining continuous production and reducing overall processing costs while preserving the ability to switch between different polymer melt types
3Productivity
If single terephthalate polyester melt processing is used, then processing simplicity is maintained, but production quantities are limited
Solution Approach 1:
The patent implements continuous alternating processing of multiple terephthalate polyester melts (M1, M2, and M3) through the same reactor, enabling simultaneous production of multiple product types in continuous operation. This dramatically increases overall production quantities compared to sequential single-melt processing while maintaining relatively simple processing methodology
Solution Approach 2:
The patent merges the processing of multiple different terephthalate polyester melts into a single reactor system operating in continuous alternating mode. By combining the processing capabilities for different polymer types (M1, M2, M3) into one integrated system, the patent achieves multiproduct production with enhanced productivity without requiring multiple separate processing lines
Data Source
AI summary
The invention relates to a method for the combined processing of at least two polymer melts selected from the group consisting of (M1), (M2) and (M3), wherein (M1) is a polymer melt comprising a terephthalate polyester (A1), (M2) is a polymer melt comprising a copolyester (A2) on the basis of terephthalic acid, at least one aliphatic, ω-dicarboxylic acid and at least one aliphatic 1,ω-diol, and (M3) is a polymer melt 0 comprising a copolyester (A3) on the basis of terephthalic acid, at least one polytetramethylene glycol and at least one aliphatic 1,ω-diol. The method comprises the alternating processing of the at least two polymer melts into at least one product selected from the group consisting of pellets (P1), fibers (P2), expanded particles (P3), preforms (P4) and articles (P5).