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What are the commonly used auxiliaries for dyeing and finishing?

2024-01-10 15:50:22
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01 Whitening agent


1, fluorescent whitening agent VBL stilbene triazine type, belongs to anionic direct dye, his dyeing performance is basically similar to direct dye, can be used salt, sodium powder to promote dyeing, slow dyeing with levelling agent, light yellow powder, the hue is violet blue, soluble in 80 times the amount of soft water, dissolved water should be slightly alkaline or medium, dye bath to medium or slightly alkaline PH 8-9 is the most suitable, Acid to PH 6, alkali to PH 11, hard resistance 300ppm, not resistant to metal ions such as copper and iron, can be mixed with anionic and non-ionic surfactants, direct and acidic anionic dyes, but should not be used with cationic dyes, cationic surfactants and synthetic resin initial body in the same bath, suitable for white or light-colored cellulose products. The amount should be appropriate, excessive whiteness will reduce or even yellowing, and it is appropriate to use no more than 0.4% for cellulose fibers.


2, fluorescent whitening agent VBU diphenyl triazine type, light yellow powder, the color is blue light violet, soluble in water, anionic, acid resistance to PH2-3, alkali resistance to PH10, can be used with anionic, non-ionic surfactants, cationic dyes, synthetic resin initial bath, but can not be used with cationic dyes and cationic additives in the same bath, It is suitable for whitening cellulose fiber, resin finishing and bleaching with acidic composition in the same bath.


3, fluorescent whitening agent DT benzooxazole derivatives, capable of strong acid and alkali, soluble in ethanol, the color is cyan purple, neutral non-ionizing dispersed yellow white emulsion, can be mixed with water in any proportion, due to the common use of polyvinyl alcohol in emulsion products to protect colloids, and a variety of salts and condensation phenomenon, so it is best used in neutral or slightly acidic bath, DT emulsion has been mixed with dispersant N0.5% or so, in storage is settling phenomenon, when used should be fully mixed to ensure the concentration, can be used for polyester, nylon and other fibers and blended fabrics bleaching, after 140-160 degrees, 2 minutes of high temperature treatment in order to fully play the role of whitening.


4, the fluorescent whitening agent WG yellow powder, the color is blue green light, the aqueous solution is neutral, anionic surfactant, acid resistance, hard water resistance, iron and copper have an effect on the white, dissolved when used, not easy to store the solution, used for wool and nylon whitening.


5, fluorescent whitening agent BCD pyrazolinium, light yellow powder, with slightly purple fluorescence, insoluble in water, can be evenly dispersed with water, stable suspension, can also dissolve in ethanol, dimethylformamide, ethylene glycol, ether, etc., non-ionic, its 1% aqueous solution is nearly neutral, used for white acrylic brightening and light-colored fiber brightening.



02 acids


1, sulfuric acid molecular formula H2SO4 colorless or brown oily liquid, strong oxidant, corrosive machine is extremely absorbent, a large amount of heat in water, dilution must be added to the acid to the water, and can not be the opposite, used as acid dyes, acid medium dyes, acid chromic dyes dyeing aid, wool carbonizing agent.


2, acetic acid (acetic acid) molecular formula CH3COOH, short for HAC, colorless transparent irritating smelly liquid, freezing point 14 degrees, corrosive, can burn the skin, used as weak acid bath acid dye, acid medium dye, neutral complexing dye dyeing aid.


3, formic acid (formic acid) molecular formula HCOOH, colorless transparent irritating smelly liquid, reducing effect, corrosion is very strong, easy to freeze in cold weather, formic acid steam can be burned, toxic, used as acid dyes, acid medium dyes dyeing aid.


4, oxalic acid (oxalic acid) molecular formula H2C2O4.2H2O, white crystal, in dry air can be differentiated into white powder, strong acid, toxic, easy to decompose and be oxidized, slightly soluble in cold water, easily soluble in hot water, ethanol and ether, used to wash iron rust stains.



03 Base


1, sodium hydroxide (caustic soda) molecular formula NaOH, sodium hydroxide content solid 95-99.5%, liquid 30-45%, solid sodium hydroxide is white, easy to delix, soluble in water release high heat, highly corrosive, can make animal fibers broken, the skin can be severe burns, easy to automatically absorb carbon dioxide from the air into sodium carbonate, container should be sealed, It is used as a solvent for reducing dyes and as a cleaning agent for removing the color after bulk dyeing.


2, sodium carbonate (soda ash) molecular formula Na2CO3, anhydrous sodium carbonate is a color powder or fine granular, absorb water and carbon dioxide in the air, caking and generating sodium bicarbonate, soluble in water, aqueous sodium carbonate has one part of water, seven parts of water, ten parts of water three. Used as wool washing aid, direct dye, vulcanized dye dyeing cotton and viscose fiber dyeing aid, reactive dye fixing agent, wool carbonization neutralizer.


3, ammonia, colorless transparent or slightly yellow liquid, has a irritating odor, can make people cry, should be contained in a sealed container, easy to decompose into ammonia when heated, volume expansion is easy to burst the container, be careful not to make the container of ammonia heated or direct sunlight. Used as a washing aid, neutralizing agent after dyeing with acid complexing dyes. 4, triethanolamine molecular formula N(OH2CH2OH)3, colorless viscous liquid, slightly ammonia odor, exposed to air easily yellow, hygrhygability, soluble in water, corrosive to copper and aluminum, used for urea aldehyde, cyanaldehyde resin initial body neutralizer.



04 Oxidant


1, hydrogen peroxide (hydrogen peroxide) molecular formula H2O2, industrial aqueous solution containing 30-40%, colorless or light yellow irritating liquid, easy to decompose oxygen, if there is a small amount of acid in the solution, the solution is relatively stable, so the manufacturer of a small amount of acetic acid or phosphoric acid, such as adding ammonia or other alkali to the solution, oxygen quickly, Strong oxidation capacity, concentrated solution can cause skin irritation, because stored in a cool dark ventilated place, avoid direct light, used as bleach.


2, sodium dichromate (Hongfengna) molecular formula Na2Cr7O7.2H2O, sodium dichromate content of about 98%, bright orange-red crystals, is an oxidizing agent, acid by high heat release oxygen, easy to damp, Hongfan toxicity, should be placed in a sealed container, used as a mordant of acid media dyes, oxidizing agent after curing dyes dyeing.


3, potassium dichromate (potassium alum) molecular formula K2Cr2O7, orange red crystal, is an oxidizing agent, not easy to deliquescent, toxic, should be placed in a sealed container, used as a mordant of acid medium dyes.


4, potassium permanganate molecular formula KMnO4, purple metallic luster granular or needle-like crystals, is a strong oxidizing agent, should be placed in a closed container, for wool shrinkage treatment.


5, sodium perborate molecular formula NaBO3.4H2O, sodium perborate content 96%, white granular crystal or powder, and then dry cold air stability, and then hot and humid air decomposition of oxygen, moisture is easy to caking decomposition, should be stored in a sealed container, used as an oxidizer after dyeing with vulcanization dye.


6, sodium hypochlorite molecular formula NaClO, extremely unstable yellow solid, soluble in water, the commodity is generally alkaline aqueous solution, colorless to slightly yellow, irritating odor, corrosive to metals, due to cotton, wool products bleaching and wool shrink resistant finishing agent.



05 Reducing agent


1, sodium sulfide (alkali sulfide) molecular formula Na2S.9H2O, sodium sulfide content 60%, yellow or orange red block, rotten egg odor, easy to absorb moisture in the air and oxidation into sodium thiosulfate, soluble in water is strong alkaline, corrosive to copper, used as oxidation dye solvent.


2, insurance powder (low sodium sulfite) molecular formula Na2S2O4, industrial insurance powder content 85-95%, the commodity does not contain crystal water for white fine crystal; The caked powder has a pungent sour taste; Avoid moisture, heat or exposure to the air, to prevent oxidation and other effects of failure, to be stored in a sealed container, moisture-proof, heat-proof, anti-oxidation deterioration; Has a strong reducing power, and water will burn; Used as a stripping agent for dyed fabrics and an agent for removing floating colors after polyester dyeing.


3, bleaching powder is a mixture of 60% insurance powder and 40% sodium pyrophosphate, white powder, to be stored in a sealed container, heat, moisture, oxidation and deterioration, easy to cause burning or explosion after heat, is a reducing agent, bleaching effect is very strong, the use of bleaching wool, silk and so on.


4, eaglewhite powder (eaglewhite block, sodium bisulfate formaldehyde) molecular formula NaHSO2.CH2O.2H2O, eaglewhite powder content 98%, white crystalline powder or block, to be stored in a sealed container, heat, moisture, reducing agent for wool shrinkage treatment, cotton printing industry in the discharge of printing printing reducing agent, dyeing fabric stripping agent.


5, sodium bisulfite molecular formula NaHSO3, white crystalline or crystalline powder, odor of sulfur dioxide, easily soluble in water, water soluble is weakly alkaline, easy to damp, oxidized into sulfate in the air, to be stored in a sealed container, used as wool fabric chemical setting agent, wool shrinkage agent.


6. Sodium sulfite molecular formula Na2SO3, soluble in water, easy to be oxidized by air sulfate, easy to lose water to become white crystalline powder, stored in sealed containers, used as wool fabric chemical setting agent and wool shrinkage agent.



06 Salts


1, Sodium chloride (salt) molecular formula NaCl, white crystal, easy deliquescence, used for direct, vulcanized, active, reducing dyes dye promoters, water softening used as ion exchange regenerant.


Sodium acetate molecular formula CH3COONa.3H2O, industrial sodium acetate containing three crystalline waters about 60% sodium acetate, soluble in water, easy to weather in the air, anhydrous sodium acetate as a white powder, used as a neutralizer after dyeing acid complex dyes; Cationic dye-dyed acrylic is a buffer to stabilize PH value.


2, copper sulfate molecular formula CuSO4.5H2O, containing 5 crystal water is dark blue crystal, no crystal water is light blue powder, toxic, soluble in water, used as a fixing agent after direct copper salt dye dyeing.


3, ammonium sulfate (fertilizer powder) molecular formula (NH4)2SO4, white or micro-yellow small crystals, used as weak acid bath acidic dyes, neutral bath acidic dyes, neutral complexing dyes dyeing agent, urea aldehyde, cyanaldehyde resin catalyst.


4, ammonium acetate molecular formula CH3COONH4, for white crystal or crystalline block, easy deliquation, slightly odor, easily soluble in water, aqueous solution is acidic reaction, thermal decomposition into acetic acid and ammonia, usually with acetic acid and ammonia solution, used as a weak acid bath acid dye aid.


5, sodium metaphosphate molecular formula (NaPO3)6, colorless transparent flake or white granular, easy delix, in the air will be hydrated, hydrated into disodium phosphate, used as a water softening agent.


6, ammonium chloride molecular formula NH4Cl, white deliquable crystallization, thermal decomposition into NH3 and HCl, used as a catalyst for resin finishing.


7, magnesium chloride molecular formula MgCl2.6H2O, white deliquescent monoclinic crystal, soluble in water, used as a catalyst for resin finishing.


8, sodium pyrophosphate molecular formula Na4P4O7.10H2O, monoclinic crystal, dissolved in water, boiling into disodium hydrogen phosphate, aqueous solution is alkaline. Used as a stabilizer for hydrogen peroxide bleaching.


9, emitrite (potassium tartrate) molecular formula K(SbO)C4H4O6.1/2H2O, potassium tartrate content 98%, colorless transparent crystal or white granular powder, toxic, weathering in the air, soluble in water, aqueous solution is slightly acidic, should be held in a sealed container to prevent from caking, with tannic acid used as weak acid bath acid dye, Color fixing agent for nylon dyed by neutral complexing dyes.


10, sodium sulfate (sodium powder) molecular formula Na2SO4, products with ten crystalline water crystalline sodium sulfate (transparent crystallization into blocks or needle-like) and sewage sodium sulfate (white powder), odorless, salty and bitter, soluble in water, used as direct dyes, sulfur dyes, reactive dyes, VAT dyes dyeing agent, slow dyeing agent of acid dyes, Synthetic lotion An enhancer for washing wool.




07 Cleaning agent


1, mercerizing soap for fatty acid sodium salt C17H35COONa and C17H33COONa mixture, anionic surfactants, decontamination, emulsification effect is good, not resistant to hard water, aqueous solution easy hydrolysis.


2, 601 detergent molecular formula CnH2n+1SO3Na, the average number of carbon atoms is 16, anionic surfactants, light yellow brown liquid, easily soluble in water, about alkyl sodium sulfonate (AS) 25%, sodium chloride 5%, water 70%, 1% aqueous solution PH value of 7-9, strong deterring power, acid, alkali, hard water resistance.


3, industrial soap anionic surfactants, beige powder, easily soluble in water, containing about 30% sodium alkyl benzene sulfonate (referred to as AAS), sodium sulfate 68%, water 2%, 1% aqueous solution PH value of 7--9, cleaning, penetration, emulsification and other properties are very good, acid, alkali, hard water resistance, moisture absorption resistance is strong, but the ability to prevent dirt in adhesion is poor, It can be improved with a small amount of carboxymethyl cellulose.


4, cleaning agent LS (cleaning agent MA) fat amide p-methoxybenzene sulfonate sodium, anionic surfactant, brown powder, easily soluble in water, 1% aqueous solution is neutral, whether in soft water or hard water washing, its penetration, diffusion performance is good, and has emulsification, leveling effect, acid, alkali, hard water resistance.


5, 209 detergent N, N-fatty acyl methyl taurine sodium, anionic surfactant, the solution is neutral, light yellow colloidal liquid, easy to dissolve in water, 1% aqueous solution PH value of 7.2-8, containing about 20% of washing active matter, washing, dyeing, penetration and emulsification ability is good, acid, alkali, hard water resistance.


6, cleaning agent 105 (cleaning agent R5) is a mixture of polyoxyethylene aliphatic alcohol ether 24%, polyoxyethylene phenyl alkyl phenol ether 10-12%, coconut oil alkyl alcohol amide 24% and water 40%, non-ionic surfactants, light brown liquid, effective composition 60%, easily soluble in water, 1% aqueous solution PH value of about 9, Wetting, penetration, emulsification, diffusion, foaming, degreasing and other properties.


7, Ramibon A (613 detergent) fatty acyl amino acid sodium, fatty acid chloride and protein hydrolytic products, anionic surfactants, for the thick brown liquid, the general effective component is 40%, easily soluble in water, 1% aqueous PH value of about 8, amino acid odor, alkali resistance, hard water resistance, no acid resistance, used as a cleaning agent and emulsifier, poor oil removal power, It is also used as levelling agent for direct dyes and vulcanized dyes.


8, cleaning agent JU epoxide imidazole derivatives, non-ionic surfactants, has good wetting, dispersion, emulsification and other effects, suitable for low temperature 30-50 degrees washing, light yellow viscous transparent liquid, 1% aqueous PH value 5-6, hard water resistance, alkali resistance, acid resistance, has excellent washing and wetting ability, and has diffusion, emulsification, levelling effect, It can be mixed with various surfactants and dyes, and is often used for cleaning wool fabrics and pre-dyeing treatment of acrylic, which can make cationic dyes dye evenly.



08 Penetrant


1, penetrant BX(open powder BX) dibutyl naphthalene sulfonate sodium, anionic surfactant, beige powder, easy to dissolve in water, 1% aqueous solution PH value 7-8.5, with two good wetting and permeability, rewetting is also good, and emulsification, diffusion and foaming properties, acid, alkali, hard water resistance (but not suitable for concentrated alkali and bleach powder solution), In addition to cationic dyes and cationic surfactants, they can generally be mixed


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