A method of utilizing natural indigo dye denim yarn
Technical field
The invention belongs to the staining technique fields of fabric, and in particular to a kind of side using natural indigo dye denim yarn
Method.
Background technique
Natural pigment is born in nature finally naturally, being compatible with the environment property is good, biodegradable, will not generate toxic object
Matter, will not be to skin irritant, more without carcinogenicity.Naturally indigo is to contain Yin with indigo plant, woaded blue, the wooden indigo plant, acanthaceous indigo etc.
It is a kind of reducing dye made of the plant leaf fermentation of diindyl sour component, it is not soluble in water, there is no affinity to fiber.When dyeing,
Indigo reduction need to can be just dissolved in water at leuco compound, have affinity to fiber, dye fiber can be gone up.Indigo restoring method has
Fermentation method, sodium hydrosulfite method, thiourea dioxide method etc..Wherein, fermentation method application is earliest, its advantage is that equipment is simple, production cost
It is cheap;The disadvantage is that needing a large amount of cumbersome manual operations, and reduction is slow, it usually needs procrypsis could be formed within 7 ~ 10 days
Body, production efficiency is low, is unable to continuous production.Thiourea dioxide method stability is poor, easily generation over reduction, causes under dye-uptake
Drop.Sodium hydrosulfite method reduction rate is fast, easy to operate, but sodium hydrosulfite stability is poor, meets water reaction acutely, generates a large amount of invalid point
Solution, need to often be excessively used, sodium hydrosulfite stabilizer is the compound of a variety of reducing agents, and sulfur-bearing, not tasteless, can be had in process of production
Effect reduces the decomposition of sodium hydrosulfite, therefore, sodium hydrosulfite reduction method is used in the present patent application, is taken a policy in reduction system
Powder stabilizer significantly reduces the dosage of sodium hydrosulfite, reaches save the cost, the purpose improved efficiency.
Indigo leuco compound is low to the affinity of cotton fiber, and dye-uptake is low, using the side for improving dye liquor concentration and dyeing temperature
Method promotes to contaminate on leuco compound, it may appear that the problems such as colour brightness is deteriorated, reproducibility is poor, poor color fastness.Therefore, of the invention
It is dyed in application using low concentration, room temperature, denim yarn is dyed by the method repeatedly soaked, roll, aoxidized.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of method using natural indigo dye denim yarn,
Meet demand of the people to environmental protection and health.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A method of using natural indigo dye denim yarn, oxidizing process repeatedly being padded to cowboy's cotton using leuco compound dye liquor
It is dyed, steps are as follows:
(1) yarn contaminates pre-treatment: being padded with the aqueous solution containing penetrating agent JFC 2g/L, pick-up 60 ~ 65%;
(2) dye: by through contaminate pre-treatment denim yarn be put into leuco compound dye liquor, under the conditions of 20 ~ 35 DEG C impregnate 10 ~
After 15min, padding machine roll compacting;
(3) it aoxidizes: denim yarn air oxidation under the conditions of 20 ~ 35 DEG C after dyeing;
(4) (2) are repeated, (3) operate 5 times;
(5) it post-processes: the yarn after oxidation being washed, squezzing, drying.
The leuco compound dye liquor includes that the raw material of following portions by weight is made: natural indigo 0.5 ~ 2g/L, sodium hydroxide 1.5
~ 4.5g/L, 0.75 ~ 1.8 g/L of sodium hydrosulfite, 0.25 ~ 0.6g/L of sodium hydrosulfite stabilizer, penetrating agent JFC 2g/L, accelerant 10 ~
15g/L。
The sodium hydrosulfite stabilizer is made of the component that following weight matches: glucose 40% ~ 50%, sodium hypophosphite 30% ~
40%, surplus is anthraquinone.
The accelerant is sodium chloride or sodium sulphate.
The preparation step of the leuco compound dye liquor is as follows:
A, dyestuff prereduction: being put into naturally indigo in beaker, a small amount of alcohol be added and water is mixed well, and then plus water, stirring reach
After mixing evenly, the insurance of formula ratio 2/3 is added in the 1/3 of the total liquid measure of leuco compound dye liquor, the sodium hydroxide that formula ratio 2/3 is added
Powder, the sodium hydrosulfite stabilizer of full dose, restores dyestuff sufficiently, and leuco compound mother liquor is made;
B, prepared by dye liquor: the water of surplus is added in dyeing cup, remaining sodium hydroxide and sodium hydrosulfite is added, is sufficiently stirred, dissolves,
Leuco compound mother liquor made from addition penetrating agent JFC, accelerant and step a, reaches the total liquid measure of leuco compound dye liquor, stirs evenly, and makes
Obtain leuco compound dye liquor.
Natural indigo concentration is that be equivalent to the concentration in leuco compound dye liquor be 0.5 ~ 2g/ to 1.5 ~ 6g/L(in the step a
L), it is 1 ~ 3g/L that 3 ~ 9g/L(of concentration of sodium hydroxide, which is equivalent to the concentration in leuco compound dye liquor), the concentration 1.5 ~ 3.6 of sodium hydrosulfite
It is 0.5 ~ 1.2 g/L that g/L(, which is equivalent to the concentration in leuco compound dye liquor), 0.75 ~ 1.8g/L(of concentration of sodium hydrosulfite stabilizer is suitable
In in leuco compound dye liquor concentration be 0.25 ~ 0.6g/L).
The concentration of sodium hydroxide is that 0.75 ~ 2.25g/L(is equivalent to hidden when leuco compound mother liquor not being added in the step b
Concentration is 0.5 ~ 1.5 g/L in colour solid dye liquor), the concentration of sodium hydrosulfite is that 0.375 ~ 0.9 g/L(is equivalent in leuco compound dye liquor
Concentration is 0.25 ~ 0.6 g/L), the concentration of penetrating agent JFC is that be equivalent to the concentration in leuco compound dye liquor be 2g/L to 3g/L(), promote
It is 10 ~ 15g/L that 15 ~ 22.5 g/L(of concentration of stain, which is equivalent to the concentration in leuco compound dye liquor).
The leuco compound repeatedly pads the pick-up 70% ~ 75% in oxidizing process step (2).
It is 1.5 ~ 2 min that the leuco compound, which repeatedly pads oxidization time in oxidizing process step (3),.
It is 40 ~ 50 DEG C that the leuco compound, which repeatedly pads the washing temperature in oxidizing process step (5), is washed 2 ~ 3 times, pick-up
60~65%。
Beneficial effects of the present invention: being dyed using room temperature, the colour brightness of dyeing product can be improved, dyeing reappears
Property, the dyefastness of denim yarn can be improved using the colouring method for repeatedly soaking, rolling, aoxidizing, dyeing, oxidation can be in rooms
It is carried out under the conditions of temperature, is not required to heat, energy conservation and environmental protection, restored using sodium hydrosulfite method, rate of reduction is high, and dyeing effect is stablized, insurance
The addition of powder stabilizer significantly improves the utilization rate and reducing power of sodium hydrosulfite, effectively reduces the decomposition of sodium hydrosulfite, is added
A small amount of sodium hydrosulfite stabilizer can reduce sodium hydrosulfite dosage 50%, and when reaching and sodium hydrosulfite stabilizer is not added, 100% dosage is protected
The almost consistent dyeing effect of dangerous powder.The aqueous solution containing bleeding agent is padded before dye, is made yarn wetting, extruding, is conducive to impregnate
Diffusion of the dyestuff to fibrous inside when dye liquor improves dyeing rate, be added in dye liquor accelerant can reduce leuco dye with
Repulsion effect between cellulose fibre, improves dye-uptake, penetrating agent JFC is added in dye liquor, is conducive to dye liquor to denim yarn
Internal infiltration improves fastness to rubbing, is not necessarily to soap after realizing denim yarn dyeing, greatly reduces water consumption.Pre-treatment is contaminated,
Bleeding agent and accelerant act synergistically in dye liquor, greatly reduce natural indigo dosage, realize extremely low concentration dyeing
Obtain the effect in darker pool.
Specific embodiment
Combined with specific embodiments below, the present invention will be further described.It should be understood that following embodiment is merely to illustrate this
The person skilled in the art of the range of invention and is not intended to limit the present invention, the field can make one according to the content of foregoing invention
A little nonessential modifications and adaptations.
Embodiment 1
The method of the natural indigo dye denim yarn of the utilization of the present embodiment, steps are as follows:
(1) dyestuff prereduction: being put into naturally indigo in beaker, a small amount of alcohol be added and water is mixed well, and then plus water, stirring reach
To the 1/3 of total liquid measure, at this point, it is 0.5 g/L that natural indigo concentration, which is the concentration that 1.5g/L(is equivalent in leuco compound dye liquor),
It is 1 g/L that sodium hydroxide 3g/L(, which is added, and is equivalent to the concentration in leuco compound dye liquor), 1.5 g/L(of sodium hydrosulfite is equivalent to hidden
Concentration in colour solid dye liquor is 0.5 g/L), the concentration that 0.75 g/L(of sodium hydrosulfite stabilizer is equivalent in leuco compound dye liquor is
0.25g/L), it restores dyestuff sufficiently, leuco compound mother liquor is made;Wherein sodium hydrosulfite stabilizer is by following weight
The component of proportion is made: glucose 40%, sodium hypophosphite 30%, surplus are anthraquinone;
(2) prepared by dye liquor: the water of surplus being added in dyeing cup, sodium hydroxide 0.75g/L(is added and is equivalent in leuco compound dye liquor
Concentration be 0.5g/L), sodium hydrosulfite 0.375g/L(be equivalent to the concentration in leuco compound dye liquor be 0.25g/L), be sufficiently stirred,
Dissolution is added penetrating agent JFC 3g/L(and is equivalent to the concentration in leuco compound dye liquor as 2g/L), accelerant sodium chloride 15g/L
(being equivalent to the concentration in leuco compound dye liquor is 10g/L), leuco compound mother liquor, stir evenly, leuco compound dye liquor are made;
(3) yarn contaminates pre-treatment: being padded with the aqueous solution containing penetrating agent JFC 2g/L, pick-up 60%;
(4) it dyes: the denim yarn through contaminating pre-treatment is put into leuco compound dye liquor, after impregnating 10min under the conditions of 20 DEG C, roll
Vehicle roll compacting, pick-up 70%;
(5) it aoxidizes: denim yarn after the dyeing air oxidation 2min under the conditions of 20 DEG C;
(6) (4) are repeated, (5) operate 5 times;
(7) post-process: the yarn after oxidation is washed 2 times under the conditions of 40 DEG C, then pick-up 60% is dried.
Embodiment 2
The method of the natural indigo dye denim yarn of the utilization of the present embodiment, steps are as follows:
(1) dyestuff prereduction: being put into naturally indigo in beaker, a small amount of alcohol be added and water is mixed well, and then plus water, stirring reach
To the 1/3 of total liquid measure, at this point, it is 2 g/L that natural indigo concentration, which is the concentration that 6g/L(is equivalent in leuco compound dye liquor), it is added
It is 3 g/L that sodium hydroxide 9g/L(, which is equivalent to the concentration in leuco compound dye liquor), 3.6 g/L(of sodium hydrosulfite is equivalent in leuco compound
Concentration in dye liquor is 1.2 g/L), it is 0.6 g/ that 1.8 g/L(of sodium hydrosulfite stabilizer, which is equivalent to the concentration in leuco compound dye liquor,
L), restore dyestuff sufficiently, leuco compound mother liquor is made;Wherein sodium hydrosulfite stabilizer is matched by following weight
Component is made: glucose 50%, sodium hypophosphite 40%, surplus are anthraquinone;
(2) prepared by dye liquor: the water of surplus being added in dyeing cup, sodium hydroxide 2.25g/L(is added and is equivalent in leuco compound dye liquor
Concentration be 1.5g/L), sodium hydrosulfite 0.9g/L(be equivalent to the concentration in leuco compound dye liquor be 0.6g/L), be sufficiently stirred, be molten
Solution is added penetrating agent JFC 3g/L(and is equivalent to the concentration in leuco compound dye liquor as 2g/L), accelerant sodium sulphate 22.5g/L
(being equivalent to the concentration in leuco compound dye liquor is 15g/L), leuco compound mother liquor, stir evenly, leuco compound dye liquor are made;
(3) yarn contaminates pre-treatment: being padded with the aqueous solution containing penetrating agent JFC 2g/L, pick-up 65%;
(4) it dyes: the denim yarn through contaminating pre-treatment is put into leuco compound dye liquor, after impregnating 15min under the conditions of 35 DEG C, roll
Vehicle roll compacting, pick-up 75%;
(5) it aoxidizes: denim yarn after the dyeing air oxidation 1.5min under the conditions of 35 DEG C;
(6) (4) are repeated, (5) operate 5 times;
(7) post-process: the yarn after oxidation is washed 3 times under the conditions of 50 DEG C, then pick-up 65% is dried.
Embodiment 3
The method of the natural indigo dye denim yarn of the utilization of the present embodiment, steps are as follows:
(1) dyestuff prereduction: being put into naturally indigo in beaker, a small amount of alcohol be added and water is mixed well, and then plus water, stirring reach
To the 1/3 of total liquid measure, at this point, it is 1.3 g/L that natural indigo concentration, which is the concentration that 3.9g/L(is equivalent in leuco compound dye liquor),
It is 2g/L that sodium hydroxide 6g/L(, which is added, and is equivalent to the concentration in leuco compound dye liquor), 2.4 g/L(of sodium hydrosulfite is equivalent in procrypsis
Concentration in body dye liquor is 0.8 g/L), it is 0.4 that 1.2 g/L(of sodium hydrosulfite stabilizer, which is equivalent to the concentration in leuco compound dye liquor,
G/L), restore dyestuff sufficiently, leuco compound mother liquor is made;Wherein sodium hydrosulfite stabilizer is matched by following weight
Component be made: glucose 40%, sodium hypophosphite 40%, surplus are anthraquinone;
(2) prepared by dye liquor: the water of surplus being added in dyeing cup, sodium hydroxide 1.5g/L(is added and is equivalent in leuco compound dye liquor
Concentration be 1g/L), sodium hydrosulfite 0.6g/L(be equivalent to the concentration in leuco compound dye liquor be 0.4g/L), be sufficiently stirred, dissolve,
It is suitable for 2g/L), accelerant sodium chloride 19.5g/L(that addition penetrating agent JFC 3g/L(is equivalent to the concentration in leuco compound dye liquor
It is 13g/L), leuco compound mother liquor in the concentration in leuco compound dye liquor, stirs evenly, leuco compound dye liquor is made;
(3) yarn contaminates pre-treatment: being padded with the aqueous solution containing penetrating agent JFC 2g/L, pick-up 63%;
(4) it dyes: the denim yarn through contaminating pre-treatment is put into leuco compound dye liquor, after impregnating 13min under the conditions of 30 DEG C, roll
Vehicle roll compacting, pick-up 73%;
(5) it aoxidizes: denim yarn after the dyeing air oxidation 1.8min under the conditions of 30 DEG C;
(6) (4) are repeated, (5) operate 5 times;
(7) post-process: the yarn after oxidation is washed 2 times under the conditions of 45 DEG C, then pick-up 63% is dried.
Embodiment 4
The method of the natural indigo dye denim yarn of the utilization of the present embodiment, steps are as follows:
(1) dyestuff prereduction: being put into naturally indigo in beaker, a small amount of alcohol be added and water is mixed well, and then plus water, stirring reach
To the 1/3 of total liquid measure, at this point, it is 0.9 g/L that natural indigo concentration, which is the concentration that 2.7g/L(is equivalent in leuco compound dye liquor),
It is 1.6g/L that sodium hydroxide 4.8g/L(, which is added, and is equivalent to the concentration in leuco compound dye liquor), 1.8 g/L(of sodium hydrosulfite is equivalent to
Concentration in leuco compound dye liquor is 0.6 g/L), the concentration that 0.9 g/L(of sodium hydrosulfite stabilizer is equivalent in leuco compound dye liquor is
0.3g/L), it restores dyestuff sufficiently, leuco compound mother liquor is made;Wherein sodium hydrosulfite stabilizer is by following weight
The component of proportion is made: glucose 45%, sodium hypophosphite 35%, surplus are anthraquinone;
(2) prepared by dye liquor: the water of surplus being added in dyeing cup, sodium hydroxide 1.2g/L(is added and is equivalent in leuco compound dye liquor
Concentration be 0.8g/L), sodium hydrosulfite 0.45g/L(be equivalent to the concentration in leuco compound dye liquor be 0.3g/L), be sufficiently stirred, be molten
Solution is added penetrating agent JFC 3g/L(and is equivalent to the concentration in leuco compound dye liquor as 2g/L), accelerant sodium sulphate 18g/L(phase
When being 12g/L), leuco compound mother liquor in the concentration in leuco compound dye liquor, stirs evenly, leuco compound dye liquor is made;
(3) yarn contaminates pre-treatment: being padded with the aqueous solution containing penetrating agent JFC 2g/L, pick-up 62%;
(4) it dyes: the denim yarn through contaminating pre-treatment is put into leuco compound dye liquor, after impregnating 12min under the conditions of 25 DEG C, roll
Vehicle roll compacting, pick-up 72%;
(5) it aoxidizes: denim yarn after the dyeing air oxidation 1.5min under the conditions of 25 DEG C;
(6) (4) are repeated, (5) operate 5 times;
(7) post-process: the yarn after oxidation is washed 3 times under the conditions of 43 DEG C, then pick-up 62% is dried.
Embodiment 5
The method of the natural indigo dye denim yarn of the utilization of the present embodiment, steps are as follows:
(1) dyestuff prereduction: being put into naturally indigo in beaker, a small amount of alcohol be added and water is mixed well, and then plus water, stirring reach
To the 1/3 of total liquid measure, at this point, it is 1.6 g/L that natural indigo concentration, which is the concentration that 4.8g/L(is equivalent in leuco compound dye liquor),
It is 2.4g/L that sodium hydroxide 7.2g/L(, which is added, and is equivalent to the concentration in leuco compound dye liquor), 3 g/L(of sodium hydrosulfite is equivalent to hidden
Concentration in colour solid dye liquor is 1 g/L), it is 0.5 that 1.5 g/L(of sodium hydrosulfite stabilizer, which is equivalent to the concentration in leuco compound dye liquor,
G/L), restore dyestuff sufficiently, leuco compound mother liquor is made;Wherein sodium hydrosulfite stabilizer is matched by following weight
Component be made: glucose 50%, sodium hypophosphite 30%, surplus are anthraquinone;
(2) prepared by dye liquor: the water of surplus being added in dyeing cup, sodium hydroxide 1.8g/L(is added and is equivalent in leuco compound dye liquor
Concentration be 1.2g/L), sodium hydrosulfite 0.75g/L(be equivalent to the concentration in leuco compound dye liquor be 0.5g/L), be sufficiently stirred, be molten
Solution is added penetrating agent JFC 3g/L(and is equivalent to the concentration in leuco compound dye liquor as 2g/L), accelerant sodium sulphate 21g/L(phase
When being 14g/L), leuco compound mother liquor in the concentration in leuco compound dye liquor, stirs evenly, leuco compound dye liquor is made;
(3) yarn contaminates pre-treatment: being padded with the aqueous solution containing penetrating agent JFC 2g/L, pick-up 65%;
(4) it dyes: the denim yarn through contaminating pre-treatment is put into leuco compound dye liquor, after impregnating 14min under the conditions of 32 DEG C, roll
Vehicle roll compacting, pick-up 74%;
(5) it aoxidizes: denim yarn after the dyeing air oxidation 1.5min under the conditions of 32 DEG C;
(6) (4) are repeated, (5) operate 5 times;
(7) post-process: the yarn after oxidation is washed 2 times under the conditions of 48 DEG C, then pick-up 65% is dried.
The measurement of fabric apparent shade depth K/S value: being measured with CE-7000A SCT high-precision colour photometer, using D65 light source and
10 ° of viewing angles, each sample are surveyed 4 times, are averaged.
Colour fastness to rubbing: it is carried out referring to GB/T 3920-2008 " textile color stability test colour fastness to rubbing "
Test.
Fastness to soaping: it is surveyed referring to GB/T 3921-2008 " textile color stability test fastness to soaping "
Examination.
Colour fastness to perspiration: it is surveyed referring to GB/T 3922-2013 " textile color stability test colour fastness to perspiration "
Examination.
Color fastness to daylight: referring to GB/T 8427-2008 " textile color stability test the color fastness of resistance to artificial light: xenon arc " into
Row test.
The K/S value and color fastness of denim yarn after table 1 is dyed according to embodiment 3
The K/S value and color fastness of denim yarn after table 2 is dyed according to embodiment 4
The color fastness for the dyeing denim yarn that table 1 is measured into table 2 is able to satisfy the requirement of denim fabric.
Comparative example 1
Sodium hydrosulfite stabilizer is not added according to the prescription of embodiment 4, with 2 times of sodium hydrosulfite amount, utilizes natural indigo dye denim yarn
Method, steps are as follows:
Then plus water (1) dyestuff prereduction: natural bipseudoindoxyl dye is put into beaker, and a small amount of alcohol is added and water is mixed well, and, is stirred
It mixes, reaches the 1/3 of total liquid measure, at this point, natural bipseudoindoxyl dye concentration is that the concentration that 2.7g/L(is equivalent in leuco compound dye liquor is
0.9 g/L), it is 1.6g/L that sodium hydroxide 4.8g/L(, which is added, and is equivalent to the concentration in leuco compound dye liquor), 3.6 g/L of sodium hydrosulfite
(being equivalent to the concentration in leuco compound dye liquor is 1.2 g/L), restores dyestuff sufficiently, it is female that leuco compound is made
Liquid;
(2) prepared by dye liquor: the water of surplus being added in dyeing cup, sodium hydroxide 1.2g/L(is added and is equivalent in leuco compound dye liquor
Concentration be 0.8g/L), sodium hydrosulfite 0.9g/L(be equivalent to the concentration in leuco compound dye liquor be 0.6g/L), be sufficiently stirred, be molten
Solution is added penetrating agent JFC 3g/L(and is equivalent to the concentration in leuco compound dye liquor as 2g/L), accelerant sodium sulphate 18g/L(phase
When being 12g/L), leuco compound mother liquor in the concentration in leuco compound dye liquor, stirs evenly, leuco compound dye liquor is made;
(3) yarn contaminates pre-treatment: being padded with the aqueous solution containing penetrating agent JFC 2g/L, pick-up 62%;
(4) it dyes: the denim yarn through contaminating pre-treatment is put into leuco compound dye liquor, after impregnating 12min under the conditions of 25 DEG C, roll
Vehicle roll compacting, pick-up 72%;
(5) it aoxidizes: denim yarn after the dyeing air oxidation 1.5min under the conditions of 25 DEG C;
(6) (4) are repeated, (5) operate 5 times;
(7) post-process: the yarn after oxidation is washed 3 times under the conditions of 43 DEG C, then pick-up 62% is dried.
The K/S value and color fastness of denim yarn after subordinate list 1 is dyed according to comparative example 1
Sodium hydrosulfite dosage increases 1 times it can be seen from subordinate list 1, and sodium hydrosulfite stabilizer is not added, and (insures with sodium hydrosulfite stabilizer is added
Powder dosage does not increase) it compares, the K/S value of dyeing gained denim yarn is very close, and color fastness is consistent.This is because sodium hydrosulfite is steady
The effect for determining agent is to effectively improve the utilization rate and reducing power of sodium hydrosulfite, reduces the decomposition of sodium hydrosulfite, to significantly drop
Low sodium hydrosulfite dosage.
Comparative example 2
According to the prescription of embodiment 4, sodium hydrosulfite stabilizer all uses glucose, utilizes the side of natural indigo dye denim yarn
Method, steps are as follows:
(1) dyestuff prereduction: being put into naturally indigo in beaker, a small amount of alcohol be added and water is mixed well, and then plus water, stirring reach
To the 1/3 of total liquid measure, at this point, it is 0.9 g/L that natural indigo concentration, which is the concentration that 2.7g/L(is equivalent in leuco compound dye liquor),
It is 1.6g/L that sodium hydroxide 4.8g/L(, which is added, and is equivalent to the concentration in leuco compound dye liquor), 1.8 g/L(of sodium hydrosulfite is equivalent to
Concentration in leuco compound dye liquor is 0.6 g/L), 0.9 g/L(of sodium hydrosulfite stabilizer of single reducing component is equivalent in leuco compound
Concentration in dye liquor is 0.3g/L), it restores dyestuff sufficiently, leuco compound mother liquor is made;
(2) prepared by dye liquor: the water of surplus being added in dyeing cup, sodium hydroxide 1.2g/L(is added and is equivalent in leuco compound dye liquor
Concentration be 0.8g/L), sodium hydrosulfite 0.45g/L(be equivalent to the concentration in leuco compound dye liquor be 0.3g/L), be sufficiently stirred, be molten
Solution is added penetrating agent JFC 3g/L(and is equivalent to the concentration in leuco compound dye liquor as 2g/L), accelerant sodium sulphate 18g/L(phase
When being 12g/L), leuco compound mother liquor in the concentration in leuco compound dye liquor, stirs evenly, leuco compound dye liquor is made;
(3) yarn contaminates pre-treatment: being padded with the aqueous solution containing penetrating agent JFC 2g/L, pick-up 62%;
(4) it dyes: the denim yarn through contaminating pre-treatment is put into leuco compound dye liquor, after impregnating 12min under the conditions of 25 DEG C, roll
Vehicle roll compacting, pick-up 72%;
(5) it aoxidizes: denim yarn after the dyeing air oxidation 1.5min under the conditions of 25 DEG C;
(6) (4) are repeated, (5) operate 5 times;
(7) post-process: the yarn after oxidation is washed 3 times under the conditions of 43 DEG C, then pick-up 62% is dried.
The K/S value and color fastness of denim yarn after subordinate list 2 is dyed according to comparative example 2
Comparative example 3
According to the prescription of embodiment 4, sodium hydrosulfite stabilizer all uses sodium hypophosphite, and the K/S value of denim yarn is after dyeing
4.8。
Comparative example 4
According to the prescription of embodiment 4, sodium hydrosulfite stabilizer all uses anthraquinone, and the K/S value of denim yarn is 5.4 after dyeing.
Comparative example 5
According to the prescription of embodiment 4, sodium hydrosulfite stabilizer all uses glucose and sodium hypophosphite, denim yarn after dyeing
K/S value is 6.9.
Comparative example 6
According to the prescription of embodiment 4, sodium hydrosulfite stabilizer all uses glucose and anthraquinone, the K/S value of denim yarn after dyeing
It is 7.1.
Comparative example 7
According to the prescription of embodiment 4, sodium hydrosulfite stabilizer all uses sodium hypophosphite and anthraquinone, the K/ of denim yarn after dyeing
S value is 6.5.
Sodium hydrosulfite stabilizer changes into containing one of or two kinds of reduction it can be seen from the coloration result of comparative example 2-7
Agent ingredient, dyeing gained denim yarn K/S value reduce, contaminate yarn color is shallower.This is because in sodium hydrosulfite stabilizer
Three kinds of reducing agents can act synergistically, effectively improve the utilization rate and reducing power of sodium hydrosulfite, reduce invalid point of sodium hydrosulfite
Solution cannot give full play to the synergistic effect of reduction components, lead to natural indigo reduction not after changing one of or two kinds of ingredients into
Sufficiently, dye utilization rate reduces, and yarn color is shallow after dyeing.
Basic principles and main features and advantages of the present invention of the invention have been shown and described above.The skill of the industry
Art personnel it should be appreciated that the present invention is not limited to the above embodiments, the above embodiments and description only describe
The principle of the present invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these
Changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and
Its equivalent thereof.