Liquid Additive Formulation for Polyester Melt Processing
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Solution Overview
Problem
Current methods for incorporating additives into polymeric materials, such as polyester fibers, face challenges including time-consuming post-production dyeing processes, difficulties with masterbatch handling, and potential detrimental effects on material properties due to carrier degradation and die head pressure issues.
Innovation Solution
A liquid formulation comprising an additive and a vehicle with specific properties, such as high flash point and weight retention, is used to introduce the additive into the polymeric material during melt-processing, ensuring compatibility and minimal impact on fiber tenacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If post-production bath dyeing or spin dyeing is used to incorporate additives into fibres, then the additive can be introduced into the fibre, but the process requires large volumes of liquid additive formulations, is time-consuming, and requires drying of the fibre
Solution Approach 1:
The invention changes the physical state of the additive from liquid to solid by converting it into a masterbatch formulation. This transformation eliminates the need for large volumes of liquid formulations and subsequent drying steps, directly addressing both the quantity of substance and productivity parameters.
Solution Approach 2:
The additive is pre-incorporated into the masterbatch before the dyeing process. This preliminary action allows the additive to be introduced along with the dyeing operation itself, eliminating the need for separate drying steps and reducing overall processing time.
2Quantity of substance
If masterbatch is used to introduce additives into polymer, then additive incorporation is achieved, but cleaning of the extruder is time-consuming and dosing and handleability of solid pelletized masterbatch can be challenging
Solution Approach 1:
The invention changes the physical state of the masterbatch from solid pellets to liquid form. This parameter change dramatically improves dosing precision and handleability while maintaining effective additive incorporation, directly addressing the ease of operation parameter.
3Quantity of substance
If liquid formulation with carrier medium is used to incorporate additive into polymer melt, then additive incorporation is achieved, but carrier degradation, die head pressure drop, fuming at the die head and poor properties of polymeric material occur
Solution Approach 1:
The invention extracts and eliminates the carrier medium from the liquid formulation. By removing the carrier component that causes degradation and fuming, the system achieves additive incorporation without the harmful side effects, directly addressing the object-affected harmful factors parameter.
Solution Approach 2:
The invention uses a carrier-free liquid formulation where the additive itself serves as the medium. This eliminates the need for separate carrier substances that would degrade and cause fuming, effectively removing the source of harmful factors.
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 method allows for efficient and stable incorporation of additives into polymeric materials without significant detrimental effects on properties, reducing processing time and avoiding issues like fuming and carrier degradation, while maintaining high fiber tenacity.
Implementation Method 1
contacting the liquid formulation with said polymeric material
Implementation Method 2
melt-processing said polymeric material
Data Source
AI summary
Additives such as colourants may be incorporated into polymeric materials such as polyesters, such as in polyester fibre production, by use of a liquid formulation comprising colourant and a vehicle. The vehicle may comprise a functionalised pentaerythritol, trimethylolpropane or trimellitate. The liquid formulation is suitably contacted with the polymeric material in a melt processing apparatus.