Aqueous Pressure-Sensitive Adhesive Composition
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Solution Overview
Problem
Existing ink jet textile printing technologies rely on hydrophobic resin compositions with organic solvents for pressure-sensitive adhesive layers, which pose environmental and health risks, and require effective methods to remove residual ink and waste threads without compromising adhesion.
Innovation Solution
An aqueous pressure-sensitive adhesive composition using a (meth)acrylic resin with an alkylene oxide chain and specific acid value, combined with water, to form a peelable adhesive layer that can be cleaned with water, reducing solvent use and enhancing adhesion and peelability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hydrophobic resin dissolved in an organic solvent is used for the pressure-sensitive adhesive layer, then water cleaning resistance is improved, but environmental burden and health risks increase
Solution Approach 1:
The patent changes the chemical composition parameters of the pressure-sensitive adhesive by using a (meth)acrylic resin with specific structural features (alkylene oxide chain with 10 or more repetitions at side chain, acid value >0 mgKOH/g) instead of hydrophobic resins with organic solvents. This parameter change enables the adhesive to maintain water cleaning resistance while eliminating harmful organic solvents, thus resolving the contradiction between reliability and environmental safety
Solution Approach 2:
The patent creates a composite aqueous pressure-sensitive adhesive composition combining (meth)acrylic resin with specific alkylene oxide chain structures and carboxyl groups. This composite material structure provides both the adhesion performance and water cleaning resistance previously achievable only with organic solvents, while eliminating environmental and health hazards
2Object-affected harmful factors
If an aqueous pressure-sensitive adhesive composition is used to reduce organic solvent, then environmental burden is reduced, but adhesion and water cleaning resistance may deteriorate
Solution Approach 1:
The patent achieves reliable adhesion and water cleaning resistance in an aqueous system by precisely controlling molecular parameters: the (meth)acrylic resin contains an alkylene oxide chain with 10 or more repetitions at the side chain and has an acid value greater than 0 mgKOH/g. These parameter specifications ensure sufficient polarity and hydrogen bonding capability for water resistance while maintaining adhesion performance
Solution Approach 2:
The alkylene oxide chain with 10 or more repetitions acts as a molecular mediator that enables the aqueous adhesive to achieve water cleaning resistance. The polar ether oxygens in the alkylene oxide chain form hydrogen bonds with water molecules, creating a water-resistant adhesive layer that can withstand water cleaning while maintaining environmental safety
3Reliability
If the pressure-sensitive adhesive layer needs to endure water cleaning, then adhesion strength is improved, but peelability deteriorates
Solution Approach 1:
The patent achieves both strong adhesion and easy peelability by controlling the acid value parameter of the (meth)acrylic resin to be greater than 0 mgKOH/g. The carboxyl groups provide strong bonding to substrates for adhesion strength, while the specific molecular structure allows controlled peeling. This parameter control resolves the contradiction between adhesion strength and peelability
Solution Approach 2:
The pressure-sensitive adhesive layer exhibits dynamic adhesion characteristics: it forms strong bonds during the printing process but allows easy peeling during fabric removal. The (meth)acrylic resin with alkylene oxide chains and carboxyl groups provides this dynamic behavior through reversible hydrogen bonding and controlled intermolecular forces, enabling both strong adhesion and easy peelability
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 aqueous adhesive composition improves peelability, adhesion, and cleaning resistance, while minimizing environmental impact and maintaining effective ink jet textile printing performance.
Implementation Method 1
a (meth)acrylic resin; and water, in which the (meth)acrylic resin includes a constituent unit having an alkylene oxide chain of which the number of repetitions is 10 or more at a side chain
Data Source
AI summary
Provided is an aqueous pressure-sensitive adhesive composition for forming a pressure-sensitive adhesive layer at a surface of a fabric transport member of an ink jet textile printing apparatus, the aqueous pressure-sensitive adhesive composition including: a (meth)acrylic resin; and water, in which the (meth)acrylic resin includes a constituent unit having an alkylene oxide chain of which the number of repetitions is 10 or more at a side chain, and an acid value of the (meth)acrylic resin is more than 0 mgKOH/g.