Processing liquid composition, composition set, processing method, and textile printing method
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Solution Overview
Problem
Current ink jet printing methods for textiles, particularly for fabrics other than polyester, face challenges in achieving sufficient color development and require the use of hazardous substances like strong alkalis and aromatic acylating agents, which pose safety and environmental concerns.
Innovation Solution
A processing liquid composition containing an oxazoline group-containing polymer and aromatic carboxylic acid is applied to fabrics with hydroxyl groups, facilitating dehydration condensation reactions that introduce aromatic functional groups, enhancing dye affinity and fastness without the need for hazardous substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If aromatic acylating agents and strong alkalis are used to achieve dyeability on cellulose fibers, then color development is improved, but safety and environmental impact deteriorate due to use of poisonous and corrosive substances
Solution Approach 1:
The patent extracts and eliminates the harmful substances (aromatic acylating agents and strong alkalis) from the dyeing process while maintaining the essential function of achieving color development on cellulose fibers through alternative safer methods
Solution Approach 2:
The patent converts the potentially harmful chemical process into a beneficial safe process by using mild alkaline solutions that achieve the same dyeing effect without the poisonous and corrosive side effects of traditional strong alkalis and aromatic acylating agents
2Manufacturing precision
If large amounts of strong alkalis and aromatic acylating agents are used to achieve sufficient color development, then dyeability is improved, but the process complexity and material consumption increase
Solution Approach 1:
The patent changes the chemical parameters of the dyeing process by using mild alkaline solutions with controlled pH and concentration ranges, replacing the traditional high-concentration strong alkalis and aromatic acylating agents, thereby achieving color development with reduced chemical consumption
3Manufacturing precision
If aromatic acylating agents are used to achieve dyeability on cellulose fibers, then color development is improved, but corrosiveness to skin and environmental harm worsen
Solution Approach 1:
The patent removes the aromatic acylating agents from the dyeing process entirely, extracting only the essential function of achieving color development on cellulose fibers through safer alternative chemical systems that do not produce corrosive or environmentally harmful effects
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 solution achieves excellent color development and fastness of dyed products while eliminating the use of hazardous substances, ensuring safer and more environmentally friendly textile printing processes.
Implementation Method 1
facilitating dehydration condensation reactions that introduce aromatic functional groups
Data Source
AI summary
A processing liquid composition of the present disclosure subjected to textile printing and which is used by being attached to a fabric including fibers having a hydroxyl group, includes an oxazoline group-containing polymer and an aromatic carboxylic acid. An oxazoline value of the oxazoline group-containing polymer is preferably 100 or more and 600 or less.