PMMA Masterbatch for Polyester Spinning Speed
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Solution Overview
Problem
The textile industry faces challenges in increasing productivity in synthetic fibre spinning processes without compromising the quality of polyester fibres and filaments, particularly in achieving higher spinning speeds while maintaining the rheological properties of pre-oriented yarns.
Innovation Solution
A polymeric composition 'masterbatch' is developed using polymethylmethacrylate (PMMA) as a support polymer, combined with pigments like carbon black and titanium dioxide, which is incorporated into molten polyester polymers during the extrusion process to enhance productivity and elongation at break, allowing for increased spinning speeds without altering the fibre's structural properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spinning speed is increased to improve productivity, then output per unit time increases, but the rheological behaviour and quality of the fibres deteriorate
Solution Approach 1:
PMMA acts as an intermediary substance added to the polyester polymer system. It modifies the rheological properties of the molten polymer, enabling high-speed spinning while maintaining fibre quality. The PMMA serves as a mediator between the conflicting requirements of high productivity and quality preservation.
Solution Approach 2:
The invention changes the rheological parameters of the polyester polymer by adding PMMA. This modification allows the system to maintain desirable flow and deformation characteristics even at increased spinning speeds, effectively decoupling the relationship between speed and quality deterioration.
2Productivity
If PMMA is added as an additive to increase elongation at break, then spinning speed can be increased, but the polymer composition becomes more complex
Solution Approach 1:
The invention creates a composite polymer system by combining PMMA with polyester polymer. This composite material approach allows the system to achieve enhanced elongation at break and increased spinning speed capability while managing the complexity through a defined two-component system with specific weight ratios.
3Productivity
If masterbatch is used to improve productivity, then spinning speed increases, but the dispersion and homogeneity of the additive becomes critical
Solution Approach 1:
The PMMA is pre-dispersed with the pigment to create a masterbatch before being incorporated into the polyester polymer. This preliminary dispersion action ensures uniform distribution of the additive system, preventing aggregation and ensuring consistent rheological modification throughout the spinning process.
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 use of PMMA as a carrier in the masterbatch significantly increases spinning speed by up to 20% and elongation at break, while maintaining the yarn's deformability and reducing orientation index, thus improving productivity and fibre quality.
Implementation Method 1
a concentrated polymeric composition ('masterbatch') comprising polymethylmethacrylate as a support ('carrier') polymer for pigments selected from carbon black and titanium dioxide dispersed in the same
Implementation Method 2
for incorporation during the extrusion process to the molten polyester polymers forming the fibres
Data Source
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AI summary
The invention pertains to the field of synthetic-fibre production for the textile industry and relates to the design and use of a concentrated polymeric composition ("masterbatch") comprising a polymer from the metlacrylate family as a support polymer, representing between 30% and 99% by weight of the polymer composition; and at least one additive and/or pigment representing between 1% and 70% by weight of said composition. During the extrusion process, the composition of the invention is incorporated into the molten fibre and filament-forming polyester polymers in order to increase speed in the spinning process (productivity).