Adhesive ink, and method for producing printed material using said adhesive ink
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Solution Overview
Problem
Existing transfer printing methods fail to achieve excellent transferability to fabrics while ensuring good fastness to wet rubbing and texture of the printed material.
Innovation Solution
An adhesive ink for inkjet printing is developed, containing a resin with a glass transition temperature of 30°C or lower and a weight average molecular weight of 10000 to 700000, which includes acrylic-based or polyester-based resins, and is used in a transfer medium with a colored ink layer, enhancing transferability and fastness to wet rubbing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional adhesive liquids or resins are used in transfer printing onto fabric, then transferability may be achieved, but fastness to wet rubbing and texture of the printed material deteriorate
Solution Approach 1:
The patent applies parameter changes by precisely controlling the glass transition temperature (30°C or lower) and weight average molecular weight (10,000 to 700,000) of the resin, along with specific ratios of water-soluble organic solvent to water (0.1 to 5.0 by mass). These parameter adjustments optimize the resin's adhesive properties for fabric transfer printing, achieving both excellent transferability and fastness to wet rubbing simultaneously.
Solution Approach 2:
The invention uses a composite adhesive ink formulation combining resin, water-soluble organic solvent, and water in specific proportions. This composite material approach allows the adhesive ink to exhibit optimized properties for fabric transfer printing, resolving the contradiction between transferability and fastness by leveraging the synergistic effects of its components.
2Strength
If adhesive ink with high molecular weight resin is used, then adhesive strength improves, but transferability to fabric deteriorates
Solution Approach 1:
The patent resolves this contradiction through parameter changes by establishing an optimal weight average molecular weight range of 10,000 to 700,000 for the resin. This specific range balances adhesive strength and transferability, preventing the ink from being too viscous for proper application while ensuring sufficient bonding strength to fabric.
3Ease of operation
If adhesive ink with low glass transition temperature resin is used, then flexibility and transferability improve, but fastness to wet rubbing deteriorates
Solution Approach 1:
The patent applies parameter changes by setting the glass transition temperature at 30°C or lower, which provides sufficient flexibility for transfer printing while maintaining fastness to wet rubbing. This temperature parameter optimization allows the resin to remain flexible during the transfer process yet form strong, durable bonds on the fabric.
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 adhesive ink provides excellent transferability to fabrics with improved fastness to wet rubbing and texture of the printed material.
Implementation Method 1
an adhesive ink containing: a resin; a water-soluble organic solvent; and water, in which the resin has a glass transition temperature of 30°C or lower and a weight average molecular weight of 10000 to 700000
Implementation Method 2
a step 4 of drying the adhesive ink
Data Source
Figure 1(a)~1(c)
Figure 2
Figure 3(d)~3(f)
AI summary
An object of the present invention is to provide an adhesive ink excellent in transferability onto a fabric during transfer printing and capable of enhancing fastness to wet rubbing and texture of an obtained printed material. The object can be achieved by an adhesive ink containing a resin, a water-soluble organic solvent, and water, in which the resin has a glass transition temperature of 30°C or lower and a weight average molecular weight of 10000 to 700000.