Polyester Fabric Finish for Durable Sweat Odor Reduction
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Solution Overview
Problem
Textile fabrics, especially those made of polyester, often develop unpleasant odors due to human perspiration that persist even after washing and can be intensified with repeated use, and existing solutions using biocides pose environmental and skin safety concerns.
Innovation Solution
Treatment of polyester textile fabrics with reaction products of aliphatic monoamines or polyamines with aliphatic monoepoxides or polyepoxides, combined with amino-functional polyorganosiloxanes and isocyanates in a liquid composition, which is applied and cured to create a finish that reduces odor formation and facilitates sweat removal during washing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If biocides such as antimicrobials are used to treat polyester articles, then the buildup of bothersome odor is reduced, but harmful impact on the environment and adverse effects on human skin occur
Solution Approach 1:
The patent extracts and eliminates the harmful biocide component from the odor control system while retaining the desired odor reduction effect. This is achieved by using alternative compounds (amino-functional silanes, polyamines, polyepoxides) that provide odor control through mechanisms other than biocidal action, thereby removing the environmental and skin safety concerns associated with traditional biocides
Solution Approach 2:
The patent introduces intermediary substances (amino-functional silanes, polyamines, polyepoxides) that mediate between the polyester fabric and odor-causing agents. These intermediaries form protective layers or reactive compounds on the fabric surface that prevent odor formation without requiring direct biocidal action, thus achieving odor control while avoiding harmful effects on environment and skin
2Object-generated harmful factors
If polyester fabrics are treated with reaction products of aliphatic monoamines or polyamines with aliphatic monoepoxides or polyepoxides, then odor formation is reduced and sweat removal is improved, but the treatment complexity and manufacturing process steps increase
Solution Approach 1:
The patent combines multiple functional components (amino-functional silanes, polyamines, polyepoxides) into a single integrated treatment composition that can be applied in one step. This merging of components achieves both odor control and sweat removal functions simultaneously, reducing the need for separate treatment steps and simplifying the overall manufacturing process
Solution Approach 2:
The treatment composition is designed to perform multiple functions simultaneously: odor control through reactive compound formation, sweat removal through surface modification, and durability enhancement through covalent bonding to the polyester fabric. This multi-functionality eliminates the need for separate treatments for each function, thereby reducing process complexity
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 fabrics exhibit significantly reduced odor formation and improved sweat removal, providing enhanced wearing comfort and environmental and skin safety without using biocides, with the finish remaining effective even after repeated washing and use.
Implementation Method 1
reaction products of aliphatic monoamines or polyamines or of a mixture of such amines with aliphatic monoepoxides or polyepoxides or with mixtures of such epoxides
Implementation Method 2
a liquid composition contains a component A comprising one or more reaction products as defined in claim 1, 2 or 3 and a component B comprising at least one monoisocyanate or polyisocyanate or a mixture of such isocyanates, wherein the isocyanates can be present in free or blocked form
Data Source
AI summary
Mixtures are described which contain reaction products of one or more amines with one or more epoxides and additionally isocyanates. Applying such mixtures to textile fabrics, especially polyester fiber fabrics, reduces or prevents unpleasant sweaty odor after physical exercise. The effects are very durable to laundering.