Textile printing method, printed matter, and recording apparatus
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Solution Overview
Problem
Textile printing using an ink jet system on nonwoven fabrics faces challenges such as dyeing unevenness and color separation due to the large gaps between fibers and difficulty in permeation of disperse dyes, leading to poor durability and texture loss.
Innovation Solution
A textile printing method involving a two-step process where a dyeing ink containing disperse dye and a non-dyeing ink with a glycol-based organic solvent having a HSP value of 13.6 or more is used, with the adhesion positions of both inks overlapping to improve dye penetration and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If ink jet printing is applied directly to nonwoven fabric, then printing process is simple, but dyeing unevenness occurs due to large gaps between fibers
Solution Approach 1:
A fixation layer comprising a polymer and a crosslinking agent is applied as an intermediary between the ink jet system and the nonwoven fabric. This fixation layer fills the gaps between fibers and provides a uniform substrate for dye attachment, eliminating dyeing unevenness while maintaining the simplicity of the ink jet printing process
Solution Approach 2:
The fixation layer is applied in advance before the actual dyeing process. By pre-treating the nonwoven fabric with the fixation layer, the structure is prepared to receive and uniformly hold the dye, preventing dyeing unevenness from occurring during the printing process
2Reliability
If disperse dye is used on nonwoven fabric, then color fastness is improved, but permeation difficulty causes poor durability
Solution Approach 1:
The fixation layer acts as a mediator that facilitates the permeation of disperse dye into the nonwoven fabric. The polymer matrix of the fixation layer allows controlled penetration of disperse dye while ensuring uniform distribution, achieving both color fastness and durability
Solution Approach 2:
The fixation layer changes the physical and chemical parameters of the fabric surface, creating a more favorable environment for disperse dye permeation. By modifying the surface properties with the fixation layer, the dye can penetrate uniformly and bind effectively, improving both penetration uniformity and durability
3Productivity
If ink jet printing is used on nonwoven fabric, then production efficiency is high, but texture is lost due to poor dye penetration
Solution Approach 1:
The fixation layer serves as an intermediary that enables effective dye penetration without requiring complex pre-treatment processes. This maintains the high production efficiency of ink jet printing while ensuring quality dye penetration and preserving the fabric texture
Solution Approach 2:
The fixation layer is applied locally to the fabric surface in the areas requiring dyeing. This localized treatment ensures that only the necessary regions receive the fixation layer, maintaining the overall texture of the nonwoven fabric while achieving good dye penetration in the printed areas
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 effectively suppresses dyeing unevenness and color separation, enhancing the durability and color development of printed nonwoven fabrics by ensuring uniform dye distribution and improved permeability of disperse dyes.
Implementation Method 1
a first adhering step of adhering to the fabric by ejecting a dyeing ink by an ink jet method
Implementation Method 2
The water-soluble organic solvent contained in the non-dyeing ink contains a glycol-based organic solvent having a HSP value of 13.6 or more
Data Source
AI summary
A textile printing method for printing on a fabric, the fabric being a nonwoven fabric containing synthetic fibers. includes a first adhering step of adhering to the fabric by ejecting a dyeing ink by an ink jet method, and a second adhering step of adhering a non-dyeing ink to the fabric. The dyeing ink contains a disperse dye, a water-soluble organic solvent, and water, and the non-dyeing ink contains a water-soluble organic solvent and water. The water-soluble organic solvent contained in the non-dyeing ink contains a glycol-based organic solvent having a HSP value of 13.6 or more, and the content of the glycol-based organic solvent is 80% by mass or more relative to the total amount of the organic solvent contained in the non-dyeing ink. The adhesion position of the dyeing ink and the adhesion position of the non-dyeing ink are at least partially overlapped each other.