Reactive Cuilan K-GL (CI 14#) P-GR (CI 72#) and Dy Cuilan KN-G (CI 21#) are copper phthalocyanine as the mother, bright colors, low cost, is the current printing and dyeing plant Popular products. Cuilan is the largest molecular weight dye. It has poor solubility and can easily cause surface coloration. It often causes problems such as low lifting force and poor color fastness. However, Cuilan can often be used for color matching, such as bright green, bright green and other bright colors. Is an indispensable variety of printing and dyeing plants. This article will help you understand the structural properties of the dyes, the advantages and disadvantages, understand the cost of dye synthesis, and skillfully and safely use this irreplaceable color.
Second, the dye structure
Structure - Monochlorotriazine dyes of copper ion phthalocyanine structure.
Third, physical and chemical properties and uses
Very large molecular weight
Unsatisfactory solubility, high directness
It is blue in concentrated sulfuric acid, blue after dilution, green in diluted nitric acid, green in concentrated nitric acid, light green after dilution, lake blue dye solution, plus 1mol/L NaOH shade, and heating with powder Change to purple, add sodium borate and restore color to lake blue
Cotton, regenerated cellulose dyeing, nylon, silk
Printing and dyeing
Fourth, application performance
Pull out white performance
Not suitable for pulling
1) The dye has a large molecular weight, poor solubility, and high directivity. It can be used to solubilize urea.
2) poor lifting power, high dosage, poor wet rubbing fastness and washing fastness
V. Manufacturing Methods and Costs
raw material name
Receipt of P-GR business standard kg
Raw materials cost per kg: price
Raw material costs
From the perspective of the above cost, plus the cost of packaging finance and other costs P-GR cuilan market price range between 32-35
Sixth, application method
1. Selection of paste
a. Sodium Alginate
Classification: low viscosity (<80mPa.s), medium viscosity (80~200mPa.s), high viscosity (>200mPa.s), suitable for rotary screen, flat screen, and manual plate.
The effect of hard water on algae causes sodium alginate to react chemically with calcium and magnesium ions in hard water, causing sodium alginate to precipitate. Common rickets such as plug network, exposed bottom, unclear outline, color stains, feel hard and so on.
The characteristics of the inferior seawater, which are mixed with starch and mixed with other salts, are very viscous and easily hydrolyzed.
Alginate raw paste paste process:
Alginate dry powder 5-8kg (depending on algae viscosity)
Sodium hexametaphosphate 1kg
Printing paste pulping process:
Sodium alginate paste 50~60kg (depending on actual needs)
Baking soda 1.5~3kg
Anti-stain salt S 1kg
b. Synthetic thickener
Synthetic thickeners made by cross-linking using a synthetic dibasic or terpolymer such as acrylic acid as a cross-linking agent are more sensitive to electrolytes, give a higher color amount than sodium alginate, and have a slightly inferior hand feeling to sodium alginate .
c. Starch denaturation paste
Grafts are grafted onto starch molecules to introduce carboxyl groups that do not react with reactive dyes. The reaction product may be a mixture, that is, a mixture of oxidized starch, grafted starch, and the like. The product has a high viscosity and can be used in combination with sodium alginate to obtain a higher amount of color, and the hand and ease of cleansing and fastness are similar to that of sodium alginate alone.
2. Dissolution method
a. Hot water dissolution method
KN type - water temperature does not exceed 60 Â°C, K type, P type: above 80 Â°C can also be added urea solubilization.
The dyes such as tender yellow and cuilan are easy to clump when they are dissolved. The method of dusting and dissolving can eliminate such situations.
3, P-GR cuilan can fight color with P-6G, not suitable for color matching with red purple orange
4, steaming process
A Temperature: 102-105Â°C
B Time: 5-8min
C Humidity: Relative humidity more than 90%, Cuilan is most sensitive to humidity
D Pressure: 0.1~0.2MPa, 1KG pressure is about 118Â°C, temperature increases by about 10Â°C for every 1KG pressure increase
5, printing auxiliary additives
A. baking soda
Printing dyes and cellulosic fibers act as necessary auxiliaries for chemical reactions. They do not add color, and dyes are added for hydrolysis.
The reason why the alkalinity agent uses baking soda is that the baking soda PH value is about 8.5, the soda ash is about 10.5, and the alkalinity is about 100 times that of baking soda. If it is added to the slurry, it will lead to color paste instability and hydrolysis of the dye; baking soda as alkali agent The color paste is relatively stable, and it becomes heated and soda ash when steaming, and the fixing effect is also guaranteed.
The three major functions: a help solution b moisture absorption c penetration
C. Anti-stain salt S
Weak oxidants prevent the reducing gas from damaging certain groups of reactive dyes when steaming.
VII. Frequently Asked Questions
Insufficient washing, cuilan best wash twice, the first time without hot soaping,
The slow release of floating and unfixed dyes into water is not easily stained.
2 feel hard
Sodium alginate is not washed, or the drying temperature is too high, and the dye reacts with algae to cause the sea
Algae can not be washed;
3. Unclear outline
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