Dyeing method of garment coating and matters needing attention

For garment coating dyeing, I believe many people don't know much about it. It is precisely because I don't know much about it that I can't use clothing coatings correctly. In this regard, the following for you to explain about clothing coating dyeing methods and matters needing attention.

For garment coating dyeing, I believe many people don't know much about it. It is precisely because I don't know much about it that I can't use clothing coatings correctly. In this regard, the following for you to explain about clothing coating dyeing methods and matters needing attention.

1. paint does not dissolve in water, is no affinity to the fiber pigment, according to the dyeing conditions of the dye can not be dyed. Used for textile, developed the use of anionic surfactant can be uniformly dispersed in water coatings.

The coating material was dispersed into fine particles having a size of 1 μm, and all of about 108mol contained in one fine particle was attached to the fiber. The dye is dyed in 1mol units (according to different conditions in several moles of association state), here we can understand the difference between paint and dye.

The 2. coating does not have the ability to spread into the inside of the fiber, and for this reason, it is physically attached to the surface of the fiber, and is fixed to the surface of the fiber using a resin component called a binder. If the adhesive is used to completely fix it on the fiber surface, the pigment is not easy to fall off and the color fastness is good. However, due to the influence of the resin contained in the adhesive, there is a shortcoming that the feel becomes hard.

Pad dyeing of 3. coatings is to force the coating to physically adhere to the fiber surface. Since it is fixed with an adhesive, dyeing can be carried out even if the coating itself has no affinity for the fibers. In the dyeing of clothing coatings and other dyeing using the absorption method, it is necessary to try to make the coating firm on the surface of the fiber.

※, when the exhaustion method is used for dyeing, a cationic polymer (for example, a compound used as a dye fixing agent and the like) is attached to the fiber surface in a pretreatment step. Generally, the coating is dispersed by an anionic surfactant, and the coating is absorbed by the surface of the fiber by ionic bonding of the cationic groups of the pretreatment agent with the anionic groups of the anionic activator on the surface of the coating.

Since this is not a combination of paint and fiber, it is not strong. After the adsorption of the coating, the resin is adsorbed to the fiber, and the coating on the surface of the fiber is bonded to the fiber by the resin. The dyeing process is as follows:

[Example of Coating Dyeing Process] Descouring → Hot Water Washing → Cationic Agent Pretreatment (60~70 ℃ × 20~30min) → Coating Dyeing (70~100 ℃ × 30min) → Adhesive Absorption (30~60 ℃) → Drying and Baking (Adhesive Fixation, 90~130 ℃ × 10min).

The main pigment used in the above dyeing method is the following chemical structure of the paint, compared with ordinary dyes, the fastness of the pigment itself is extremely good:

Yellow: Acetoacetic aniline yellow paint

Red: azo coatings

Blue-Green: Phthalocyanine Coatings

Black: carbon black coating

White: titanium white coating

However, in the above-mentioned dyeing method, the fibers having no affinity are combined with the pigment by the binder, and for this reason, the color fastness is related to the degree of combination of the coating based on the binder and the fibers.

In many cases, it is not suitable to use a large amount of adhesive in the exhaustion method. For example, when dyeing garment coatings, due to the great emphasis on hand feeling and popularity, it is necessary to reduce the amount of adhesive used. Therefore, the following problems often occur in color fastness:

1, light fastness (discoloration), discoloration (caused by incomplete combination of coatings, condensation and swimming, etc.);

2. Rubbing fastness (wet) and abrasion pollution (caused by incomplete combination of dyeing on the coating surface);

3, washing resistance, color off (caused by the solvent resistance of the adhesive).

For fabrics dyed with paint by the absorption method, the color fastness is not up to standard, so it is necessary to fully grasp these conditions, on the basis of the original research and development.