The business agency reported on August 23 that the paint is insoluble in water and is a pigment that does not have an affinity for fiber and cannot be dyed according to the dyeing conditions of the dye. For textiles, coatings have been developed that use anionic surfactants to disperse evenly in water. This type of paint is called coating resin coloring (PRC) and is generally used for paint printing.
Generally, the paint is dispersed into microparticles of 1 micron size, and about 108 moles of pigment molecules contained in one microparticle are all attached to the fibers. Whereas dyes are dyed in one molar unit (a few moles of associating state depending on the situation), we can understand the differences between paints and dyes.
The paint does not have the ability to diffuse inside the fiber. For this reason, the surface of the fiber is physically attached, and it is fixed to the surface of the fiber using a resin component called a binder. If the binder is used to completely fix it on the surface of the fiber, the pigment will not easily come off and the color fastness will be good. However, due to the influence of the resin contained in the adhesive, there is a shortcoming that the touch becomes hard.
Paint printing or paint padding is the mandatory coating to physically attach to the fiber surface. Due to the use of adhesives, dyeing can be performed even if the coating itself does not have affinity for the fibers. In the dyeing of garment coats and the like using the exhaust method, it is necessary to try to secure the paint to the fiber surface.
When dyeing using the exhaustion method, a cationic polymer (for example, a compound used as a dye fixing agent and the like) is attached to the fiber surface in the pretreatment step. Generally, the coating is dispersed by an anionic interfacial activating agent, and the coating is absorbed by the surface of the fiber by the combination of the cationic groups of the pretreatment agent and the anionic groups of the anionic activator on the surface of the coating.
Because this is not a combination of paint and fiber, it is not strong. After adsorption of the paint, the resin is adsorbed on the fiber, and the paint on the surface of the fiber is bonded to the fiber by the resin. The staining process is as follows:
[Example of coating dyeing process] Rehearsal → Hot water wash → Cationic agent pretreatment (60～70°C×20～30min) → Coating dyeing (70～100°C×30min) → Absorption of adhesive (30～60°C) →Drying/baking (Fixing of the adhesive, 90 to 130°C×10 min) (Recently, the surface has been positive, and the new coating product has been exposed even if the pretreatment is dispensed with)
The main pigment used in the above dyeing method is the following chemical structural paint, and the fastness of the pigment itself is extremely good as compared with common dyes. Yellow: Acetoacetic acid Aniline Yellow paint Red: Azo-based paint Blue to green: Phthalocyanine Class Coatings Black: Carbon Black Class Coatings White: Titanium Class Coatings However, the above dyeing process uses binders to bind non-affinity fibers to pigments. For this reason, the color fastness is related to the binder-based coatings. The degree of fiber bonding is related.
Generally, in the pigment printing method, since the pigment is fixed on the printed portion by a large amount of adhesive, the handle is hard but the fastness is good.
In the exhaustion method, it is not appropriate to use a large amount of adhesive for treatment. For example, when clothing coatings are dyed due to their great importance on hand and epidemic, it is necessary to reduce the amount of adhesive used. For this reason, the following problems often occur in color fastness:
· Fastness to sunlight (discoloration), discoloration (caused by the incomplete combination of coating, aggregation and migration, etc.)
·Critical fastness (wet), abrasion pollution (caused by incomplete dyeing of the coating surface)
· Washing resistance, color loss (caused by the solvent resistance of the adhesive) The fabrics dyed with the paint by the exhaustion method, the color fastness is less than the standard is more common, it is necessary to fully grasp these conditions after the New product development.
Generally, the paint is dispersed into microparticles of 1 micron size, and about 108 moles of pigment molecules contained in one microparticle are all attached to the fibers. Whereas dyes are dyed in one molar unit (a few moles of associating state depending on the situation), we can understand the differences between paints and dyes.
The paint does not have the ability to diffuse inside the fiber. For this reason, the surface of the fiber is physically attached, and it is fixed to the surface of the fiber using a resin component called a binder. If the binder is used to completely fix it on the surface of the fiber, the pigment will not easily come off and the color fastness will be good. However, due to the influence of the resin contained in the adhesive, there is a shortcoming that the touch becomes hard.
Paint printing or paint padding is the mandatory coating to physically attach to the fiber surface. Due to the use of adhesives, dyeing can be performed even if the coating itself does not have affinity for the fibers. In the dyeing of garment coats and the like using the exhaust method, it is necessary to try to secure the paint to the fiber surface.
When dyeing using the exhaustion method, a cationic polymer (for example, a compound used as a dye fixing agent and the like) is attached to the fiber surface in the pretreatment step. Generally, the coating is dispersed by an anionic interfacial activating agent, and the coating is absorbed by the surface of the fiber by the combination of the cationic groups of the pretreatment agent and the anionic groups of the anionic activator on the surface of the coating.
Because this is not a combination of paint and fiber, it is not strong. After adsorption of the paint, the resin is adsorbed on the fiber, and the paint on the surface of the fiber is bonded to the fiber by the resin. The staining process is as follows:
[Example of coating dyeing process] Rehearsal → Hot water wash → Cationic agent pretreatment (60～70°C×20～30min) → Coating dyeing (70～100°C×30min) → Absorption of adhesive (30～60°C) →Drying/baking (Fixing of the adhesive, 90 to 130°C×10 min) (Recently, the surface has been positive, and the new coating product has been exposed even if the pretreatment is dispensed with)
The main pigment used in the above dyeing method is the following chemical structural paint, and the fastness of the pigment itself is extremely good as compared with common dyes. Yellow: Acetoacetic acid Aniline Yellow paint Red: Azo-based paint Blue to green: Phthalocyanine Class Coatings Black: Carbon Black Class Coatings White: Titanium Class Coatings However, the above dyeing process uses binders to bind non-affinity fibers to pigments. For this reason, the color fastness is related to the binder-based coatings. The degree of fiber bonding is related.
Generally, in the pigment printing method, since the pigment is fixed on the printed portion by a large amount of adhesive, the handle is hard but the fastness is good.
In the exhaustion method, it is not appropriate to use a large amount of adhesive for treatment. For example, when clothing coatings are dyed due to their great importance on hand and epidemic, it is necessary to reduce the amount of adhesive used. For this reason, the following problems often occur in color fastness:
· Fastness to sunlight (discoloration), discoloration (caused by the incomplete combination of coating, aggregation and migration, etc.)
·Critical fastness (wet), abrasion pollution (caused by incomplete dyeing of the coating surface)
· Washing resistance, color loss (caused by the solvent resistance of the adhesive) The fabrics dyed with the paint by the exhaustion method, the color fastness is less than the standard is more common, it is necessary to fully grasp these conditions after the New product development.
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