Blended textile composition with improved dyeing properties
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Solution Overview
Problem
The existing methods for dyeing blended fabrics, particularly those combining natural and synthetic fibers, face challenges due to differences in dye performance across fiber types, requiring higher temperatures and pressures, specialized equipment, and additional processing steps, which increase costs and complexity.
Innovation Solution
A polyester copolymer filament is produced by polymerizing terephthalic acid, ethylene glycol, caprolactone monomer, pentaerythritol, and polyethylene glycol, allowing for the creation of a blended yarn that can be dyed at lower temperatures and pressures, using a continuous polymerization process, and incorporating reactive or dispersed dyes to achieve desirable color fastness properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional dyeing methods are used for blended fabrics, then color fastness can be achieved, but higher temperatures and pressures are required, increasing energy consumption and production costs
Solution Approach 1:
The patent modifies the chemical composition parameters of polyester fibers by incorporating specific comonomers (carboxylic acid, hydroxyl, and amino groups) that change the dyeing parameters required. This allows dyeing to occur at lower temperatures and pressures while maintaining color fastness, directly resolving the contradiction between reliability and energy consumption.
Solution Approach 2:
The invention creates a composite fiber structure by blending polyester with natural fibers and incorporating functional comonomers. This composite approach enables the fabric to accept both natural and synthetic fiber dyes under unified, milder conditions, reducing the need for high-energy processing while achieving satisfactory color fastness across different fiber types.
2Reliability
If traditional dyeing methods are used for blended fabrics, then color fastness can be achieved, but specialized equipment and additional processing steps are required, increasing device complexity
Solution Approach 1:
The modified polyester fibers with functional comonomers serve multiple functions: they provide the structural properties of synthetic fibers while also gaining the ability to accept natural fiber dyes. This universality eliminates the need for separate dyeing processes for different fiber types, simplifying equipment requirements and reducing processing steps while maintaining color fastness.
Solution Approach 2:
The patent merges the dyeing requirements of natural and synthetic fibers into a single unified process by modifying polyester to accept both types of dyes. This combination eliminates the need for separate dyeing stages and specialized equipment for each fiber type, reducing device complexity while achieving satisfactory color fastness for blended fabrics.
3Reliability
If traditional dyeing methods are used for blended fabrics, then color fastness can be achieved, but water and energy usage increase
Solution Approach 1:
By changing the chemical parameters of polyester through comonomer incorporation, the patent enables dyeing at lower temperatures and with reduced water requirements. The functional groups introduced facilitate dye penetration and bonding under milder conditions, maintaining color fastness while significantly reducing water and energy loss during the dyeing process.
4Adaptability or versatility
If blended fibers are used to achieve desired fabric properties, then versatility is improved, but dyeing performance becomes inconsistent across fiber types
Solution Approach 1:
The patent creates a composite fiber system where modified polyester (with functional comonomers) is blended with natural fibers. This composite structure maintains the versatility of combining different fiber properties while ensuring consistent dyeing performance across all fiber types in the blend, as the modified polyester can now accept both natural and synthetic fiber dyes under the same conditions.
Solution Approach 2:
The introduction of functional comonomers creates a more homogeneous chemical environment within the polyester fibers, enabling uniform dye acceptance across different fiber types in the blend. This homogenization of dyeing characteristics across diverse fibers maintains fabric property versatility while achieving consistent color fastness throughout the blended fabric.
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 dyeing expenses by up to 50% and decreases water and energy usage by 20% and 25%, respectively, while enhancing pilling performance and simplifying the dyeing process for mixed-fiber fabrics, enabling cost-effective production of colorfast textiles.
Implementation Method 1
polymerizing terephthalic acid, ethylene glycol, caprolactone monomer, pentaerythritol, and polyethylene glycol to form a polyester copolymer melt
Implementation Method 2
spinning the polyester copolymer melt into the polyester copolymer filament
Data Source
AI summary
A copolymer composition with advantages for textile fibers, yarns, blended yarns, fabrics, and garments and methods for making and using the same are disclosed. The copolymer composition may comprise 84-86% terephthalic acid, 13-16% ethylene glycol, 0.5-1.5% caprolactone monomer, 0.1-2% pentaerythritol and/or 0.5-2% polyethylene glycol.