Fluorine-Free Treated Article Using Wax Sizing and Polymer Retention Aid
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Solution Overview
Problem
High performance treated articles, particularly those used in the food industry, face a challenge in achieving environmental friendliness without compromising properties such as corn oil bleedthrough prevention and hot water repellency due to the reduction of fluorine content.
Innovation Solution
A dispersion comprising a solvent, a sizing agent, and a retention aid is used to create a treated article that is fluorine-free, where the sizing agent, typically a naturally occurring wax, and the retention aid, a nitrogen-containing polymer, synergistically enhance properties like corn oil bleedthrough prevention and hot water repellency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If fluorine content is reduced in treated articles, then environmental friendliness is improved, but performance properties such as corn oil bleedthrough prevention and hot water repellency deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters by replacing fluorinated polymers with a combination of cationic starch and cationic polymer. This substitution maintains the desired performance properties (oil bleedthrough prevention and hot water repellency) while eliminating fluorine content, thus resolving the contradiction between environmental friendliness and performance reliability
Solution Approach 2:
The patent uses a composite treatment system comprising multiple components: cationic starch, cationic polymer, and anionic polymer in specific ratios. This composite approach combines the benefits of different materials to achieve both environmental friendliness (no fluorine) and high performance (oil and water resistance), resolving the contradiction by creating a synergistic material system
2Reliability
If fluorinated polymer is used to achieve high performance, then corn oil bleedthrough prevention and hot water repellency are improved, but environmental friendliness deteriorates
Solution Approach 1:
The patent extracts and removes fluorinated polymers from the treatment composition entirely, replacing them with fluorine-free alternatives (cationic starch and cationic polymers). This extraction eliminates the harmful fluorine content while maintaining performance through the alternative polymer system
Solution Approach 2:
The patent employs biodegradable and environmentally benign polymers (starch-based and natural polymers) that can be easily broken down, replacing persistent fluorinated compounds. These alternative materials are less harmful to the environment and can be disposed of more safely, resolving the environmental concern while maintaining performance
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 article achieves excellent balance of performance properties, including improved corn oil bleedthrough resistance and hot water repellency, with reduced fluorine content.
Implementation Method 1
the sizing agent, typically a naturally occurring wax, and the retention aid, a nitrogen-containing polymer, synergistically enhance properties like corn oil bleedthrough prevention
Implementation Method 2
the sizing agent and the retention aid results in the treated article having excellent corn oil bleedthrough prevention/resistance
Implementation Method 3
the sizing agent and the retention aid results in the treated article having excellent corn oil bleedthrough prevention/resistance and hot water repellency
Data Source
AI summary
A treated article includes fibers, a sizing agent, and a retention aid. The sizing agent includes a wax or a component thereof having an acid value of from 10 mg to 220 mg, KOH/g as measured in accordance with USP 401. The retention aid includes a nitrogen-containing polymer independently selected from the group consisting of (i) a nitrogen-containing polymer of Formula I, (ii) a polyethyleneimine, (iii) a polyaminoamide, (iv) a copolymer formed from the reaction product of epichlorohydrin and dimethylamine, and (v) combinations thereof.