Textile Repellent Treatment Using pH-Controlled Thermal Gelation
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Solution Overview
Problem
Existing methods for imparting water-repellency and oil-repellency to textiles, such as carpets, using the Exhaust process do not achieve a high enough adhesion rate of water- and oil-repellent agents, resulting in insufficient repellency.
Innovation Solution
A method involving a treatment liquid with a fluorine-containing compound and a thermally gelling substance, adjusted to a pH of at most 7, applied to the textile, followed by steam treatment and washing, to enhance adhesion and repellency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional Exhaust process methods are used to treat textiles with water- and oil-repellent agents, then the treatment can be completed, but the adhesion rate of the repellent agent is insufficient and water- and oil-repellency is not achieved
Solution Approach 1:
The patent changes the pH parameter of the treatment liquid to at most 7 (neutral or slightly acidic), which is different from conventional methods that use higher pH. This parameter change optimizes the adhesion of fluorine-containing compounds to textile fibers, resulting in high adhesion rate and excellent water- and oil-repellency without requiring excessive amounts of repellent agent
Solution Approach 2:
The patent uses a composite treatment liquid containing fluorine-containing compounds (such as fluorinated surfactants or polymers) combined with specific additives that enhance adhesion when pH is at most 7. This composite formulation improves the effectiveness of the repellent agent, achieving high adhesion rate and durable water- and oil-repellency
2Reliability
If the Exhaust process is performed with existing methods, then the treatment process can be completed, but sufficiently high adhesion rate and excellent water- and oil-repellency cannot be obtained
Solution Approach 1:
By adjusting the pH parameter to at most 7, the patent creates optimal conditions for the adhesion of water- and oil-repellent agents to textile fibers. This precise parameter control ensures high adhesion rate and achieves excellent water- and oil-repellency, resolving the contradiction between repellency performance and adhesion precision
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 method achieves a high adhesion rate of the water- and oil-repellent agent, resulting in excellent water-repellency and oil-repellency, as demonstrated by improved fluorine adhesion rates, water-repellency, and oil-repellency test results.
Implementation Method 1
the water- and oil-repellent agent or the treatment liquid comprises a thermally gelling substance, or, in the step (3), the thermally gelling substance is used in addition to the treatment liquid and the thermally gelling substance is applied to the textile with contacting the thermally gelling substance with the treatment liquid
Implementation Method 2
treating the textile with steam
Data Source
AI summary
A textile having high fluorine adhesion rate, and excellent water- and oil-repellency can be obtained by a method of producing a treated textile, comprising steps of: (1) preparing a treatment liquid comprising a water- and oil-repellent agent which comprises at least one fluorine-containing compound selected from the group consisting of a fluorine-containing polymer or a fluorine-containing low molecular weight compound, (2) adjusting pH of the treatment liquid to at most 7, (3) applying the treatment liquid to a textile, (4) treating the textile with steam, and (5) washing the textile with water and dehydrating the textile, wherein the treatment liquid comprises a thermally gelling substance.