Acid-Treated Polyester Fiber for Durable Antibacterial Deodorizing
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Solution Overview
Problem
Existing polyester fibers with antibacterial agents face issues of poor color tone, durability, and environmental concerns related to inorganic agents like silver or zinc ions, while requiring enhanced characteristics beyond antibacterial performance.
Innovation Solution
A polyester fiber with a pH of 4.0 to 6.6, copolymerized with ester-forming metal sulfonate or phosphonium sulfonate compounds, undergoes acid treatment and hydrophilization to achieve excellent antibacterial, deodorizing, and stain resistance, along with sufficient durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inorganic antibacterial agent such as silver ions or zinc ions is kneaded into polyester fibers, then antibacterial performance is improved, but color tone deteriorates and environmental problems arise
Solution Approach 1:
The invention extracts and eliminates inorganic antibacterial agents (silver ions, zinc ions) from the polyester fiber system, replacing them with organic antibacterial agents that do not cause color deterioration or environmental problems, while maintaining antibacterial performance
Solution Approach 2:
The invention changes the chemical nature of the antibacterial agent from inorganic to organic, and adjusts the pH of the polyester fiber to 4.0-6.6 through acid treatment, creating a new parameter regime that achieves antibacterial activity without the side effects of inorganic agents
2Reliability
If an antibacterial agent is added in post-processing, then antibacterial performance is improved, but durability deteriorates
Solution Approach 1:
The invention incorporates the antibacterial agent during the polyester fiber production process rather than adding it in post-processing, ensuring the agent is integrated into the fiber structure from the beginning, which maintains durability while providing antibacterial performance
Solution Approach 2:
The invention merges the production of polyester fiber with the incorporation of antibacterial agents, combining these two previously separate processes into one integrated process where the antibacterial agent is added during polymerization or fiber formation
3Reliability
If polyester fiber pH is reduced to 4.0-6.6 through acid treatment, then deodorizing performance and stain resistance are improved, but fiber strength may deteriorate
Solution Approach 1:
The invention optimizes the pH parameter to a specific range (4.0-6.6) that is low enough to provide deodorizing performance and stain resistance but high enough to avoid excessive degradation of fiber strength, representing a balanced parameter optimization
Solution Approach 2:
The invention applies partial acid treatment to achieve the desired pH range without over-treating the fiber, which would cause excessive strength loss. The treatment is controlled to provide just enough acidification for deodorizing performance while preserving fiber integrity
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 treated polyester fiber exhibits superior antibacterial performance, deodorizing capabilities, and stain resistance, maintaining durability through acidification and hydrophilization processes.
Implementation Method 1
the acidification of a polyester fiber makes it possible to obtain a polyester fiber having, in addition to antibacterial performance, excellent deodorizing performance and stain resistance together with sufficient durability
Implementation Method 2
the polyester fiber is hydrophilized
Data Source
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Figure 3
AI summary
Disclosed are a polyester fiber having excellent antibacterial performance, deodorizing performance, and stain resistance together with sufficient durability; a method for producing the same; a cloth; a textile product; and a polyester formed article. The polyester fiber, cloth, or polyester formed article has a pH of less than 7.0 achieved by subjecting a polyester fiber, a cloth, or a polyester formed article containing a polyester copolymerized with an ester-forming metal sulfonate compound and/or an ester-forming phosphonium sulfonate compound to an acid treatment, or alternatively by applying a processing liquid having a pH of less than 7.0 to a polyester fiber, a cloth, or a polyester formed article.