dyeing of cellulosic fabrics with reactive dyes

1Dyeing Department Technical Weeks - 03.07. 02 Susanne Ehret

OO

OOH

OHCH2OH

CH2OH

O

HOOH

OO

OOH

OH

CH2OH


Market share of dyestuffs for cellulosic fibers worldwideMarket share of dyestuffs for cellulosic fibers worldwide

Reactive48%

Direct19%

Vat16%

Sulphur15%

Others2%


Reactive dyes are the most important dyeclass for cellulosic fibers

Reactive dyes are the most important dyeclass for cellulosic fibers

Dyeing auxiliariesDyeing auxiliariesR eac ti ve

48%

Di r ec t

19%

V at

16%

Sul phur

15%

Other s

2%

To obtain a levelled dyeing the

Demands on dyeing auxiliaries for dyeing with Demands on dyeing auxiliaries for dyeing with reactive dyes by the exhaust methodreactive dyes by the exhaust methodare demonstrated and furthermoreare demonstrated and furthermore

the most important dyeing parameters are explained

To obtain a levelled dyeing the

Demands on dyeing auxiliaries for dyeing with Demands on dyeing auxiliaries for dyeing with reactive dyes by the exhaust methodreactive dyes by the exhaust methodare demonstrated and furthermoreare demonstrated and furthermore

the most important dyeing parameters are explained


The fabric should not contain any disturbingThe fabric should not contain any disturbing residual substancesresidual substances

The fabric should not contain any disturbingThe fabric should not contain any disturbing residual substancesresidual substances

Demands on pretreated cellulosic fabricDemands on pretreated cellulosic fabric

pH neutral - slightly acid no heavy metal and low alkaline earth metal content good absorbency

low content of residual surface active agents

no residual peroxide !no residual peroxide !


Residual products from preparing processResidual products from preparing process

in the reactive dyebathin the reactive dyebath

Safety can be achieved by using an agent for peroxide destruction

before the dyeing process

Safety can be achieved by using an agent for peroxide destruction

before the dyeing process

0.1 g/l residual peroxide

0.1 g/l residual hydrosulfite

2.0 g/l MEROPAN BRE

0.5 g/l CHT - CATALASE BF

Originaldyeing


Products for peroxide destruction

Inorganic salts

MEROPAN BRE

economic process: saving of water, energy and time

Enzymes / bio-catalysts

CHT-CATALASE BF

CHT-CATALASE FTS 40

dyeing in the same bathlow water consumptioneconomic processecological process no waste water pollution!


Application requirements of MEROPAN BRE Application requirements of MEROPAN BRE

check

pH - and

H2O2

MEROPAN BRE

If necessary rinse, refill

reactivedyeingprocess

dye bathdestruction of residual peroxide

• bleach 95 °C / 203 °F, 30 min

• cool down to80 - 90 °C/176 - 194 °F

bleach bath

> pH 10

Advantage: - one bath-two step bleach possible, - residues of MEROPAN BRE do not disturb the reactive dyeing process

15 min


Enzymatic destruction of peroxideEnzymatic destruction of peroxide Enzymes are bio-catalysts: • Catalysts are chemical substances which accelerate reactions

without being used up. • Enzymes are formed in the living organism. This natural production is

also used in a synthesis way, the enzymes are produced with fungi or bacteria cultures on large scale.

• Advantage: completely biodegradable!• Because of their cellular structure

the enzymes have a clear defined surface.• An enzyme has on the surface an

active centre with an equal complementary centre.• the enzymes work like a key-lock princip

+

+

enzyme substrate enzyme-substrate-complexe

enzyme splitting product splitting


Efficiency of catalasesEfficiency of catalasesCatalases are enzymes which accelerate the decomposing reaction

from hydrogen peroxide to inactive oxygen and water.

The catalase accelerates the reaction but is not used up and will

be continuously efficient.

The catalase does not have any influence on the dyestuff, therefore it can

be dyed directly without intermediate rinsing process.

H O

O2H2O

+CHT-

CATALASE BF

+H2O

HO

H OHO


CHT catalase product range

CHT-CATALASE BF CHT-CATALASE FTS 40

thermostable product low temperature/low-price

20 - 60 °C / 68-140°F 20 - 40 °C / 68-104 °F

pH range: 4 - 9 6 - 9

time: ~ 10 min ~ 10 min

0.3 - 0.6 g/l 0.3 - 0.6 g/l

at 20°C / 68°F

1 part CHT-CATALASE BF = 1 part CHT-CATALASE FTS 40

at 40°C / 104°F

1 part CHT-CATALASE BF = 1.5 parts CHT-CATALASE FTS 40

CHT-CATALASE BF CHT-CATALASE FTS 40

thermostable product low temperature/low-price

20 - 60 °C / 68-140°F 20 - 40 °C / 68-104 °F

pH range: 4 - 9 6 - 9

time: ~ 10 min ~ 10 min

0.3 - 0.6 g/l 0.3 - 0.6 g/l

at 20°C / 68°F

1 part CHT-CATALASE BF = 1 part CHT-CATALASE FTS 40

at 40°C / 104°F

1 part CHT-CATALASE BF = 1.5 parts CHT-CATALASE FTS 40


CHT-CATALASE BF and CHT-CATALASE FTS 40 CHT-CATALASE BF and CHT-CATALASE FTS 40 range of use in comparisonrange of use in comparison

° C °F

40 104

50 122

60 140

70 15880 176

90 194

pH-value1 2 8 9 10 11 123 4 5 6 7

FTS 40

BF

30 86

20 68

10 50

CHT-CATALASE FTS 40 is cheaper,but less thermostable


For optimum efficiency For optimum efficiency following conditions are required:following conditions are required:

Application requirements:

H2O2 bleach

Rinse

Fresh bath (check pH)

Add catalase

Treat 10 - 15 min at required temperature

Remaining peroxide control, e.g. with Merck® test stripes

Dyeing in the same bath


Detection and semiquantitative determination of peroxides in aqueous solutions with test strips

Analytical test strips from Merck® contain peroxidase.Peroxidase transfers oxygen from the peroxide to an organic redox indicator, which is then converted to a blue-coloured oxidation product.

Instructions for use:

Immerse the reaction zone in the solution for 1 sec.Shake off excess liquid from the strip.Compare with the colour scale (0.5-25 mg/l H2O2)after 15 sec.

The appearance of any blue coloration within 3 mincan be interpreted as a positiv reaction.


Determination of residual peroxide on bleached fabric

A drop of TiCl4 reagent is put on the bleached fabric.The colour is compared with a scale.

without H2O2 with H2O2


Application amount of peroxide killersApplication amount of peroxide killers

MEROPAN BRE

1 part H2O2 35% = 2 parts MEROPAN BRE

1 kg H2O2 35% 2 kg MEROPAN BRE

CHT-CATALASE BF1 part H2O2 35% = 0.167 part CHT-CATALASE BF

1 kg H2O2 35% 0.167 kg CHT-CATALASE BF € 0.93


Demands on lubricants for Demands on lubricants for cellulosic fiberscellulosic fibers

With lubricantWith lubricant reduces creases on piece

dyeing prevents cracks and

abrasion marks reduced textile-to-textile

friction CHT solution:

BIAVIN - lubricants


Demands on lubricants for Demands on lubricants for cellulosic fiberscellulosic fibers

The BIAVIN lubricants allow smoothly running dyeing processes on the following conditions:

heavily loaded jet and overflow dyeing machines, for delicate, light, but bulky fabrics

for harsh fibers with the tendency to form cracks

for pile fabrics sensitive to abrasion


CHT - range cellulosic lubricantsCHT - range cellulosic lubricants

application amount0.1 - 0. 3 g/l

reduces friction of fabricexhaust onto the fabric w ith salt

w ashed off by rinsing

Cell, PES, PA, WO, silk

emulsified fat compoundconcentrated product

anionic

BIAVIN 109

application amount1.0 - 2.0 g/l

viscosity is slightly increasedexcellent gliding properties

cellulosics and blends

sulfated fats

anionic

BIAVIN GLM


viscosity is increasedhigher liquor pick up

slipping effectfriction is reduced

all sorts of fibers

polymeric amidesuniversally applicable

no ionic character

BIAVIN BPA


exhaust onto the fabricremains partially

softer handlebetter sew ability

cellulosics andsynthetic m icrofibers w ith EL

polyethylene emulsionnonionic

BIAVIN TCC

CHT anticrease agents and lubricantsfor cellulosics and blends


Cellulosic articles with elastane add wetting agent add 2 - 3 g/l BIAVIN TCCBIAVIN TCC load fabric into the dyeing machine fabric must have good and same wetting

properties prescour or prebleach rinse add dyebath auxiliaries + 1.0-1.5 g/l BIAVIN TCCBIAVIN TCC raise dye temperature slowly and cool down slowly


Demand on dyeing levelnessDemand on dyeing levelness

Levelling agent for reactive dyes ?Levelling agent for reactive dyes ? Levelling agents in the classical meaning are

not available for reactive dyeings. Reason for this is the reaction of the reactive

dye with the cellulosic fiber. Migration of already fixed dye molecules is not

possible ! This would be a chemical miracle.

How does CHT solve this problem ?How does CHT solve this problem ?


CHT solutionCHT solution


SARABID LDR = dyebath conditionerSARABID LDR = dyebath conditionerSARABID LDR = dyebath conditionerSARABID LDR = dyebath conditioner

How does How does SARABID LDRSARABID LDR work ? work ? increases the dyestuff solubility and therefore

improves the dye diffusion into the fiber excellent dispersing effect inactivates Ca, Mg in water and on textile prevents dyestuff agglomerations avoids precipitations of all kinds of impurities

brought into the dyebath by fiber or water applicable in cellulosic dyeing with reactive dyes

and CEL/PES blends one-bath dyeing


Dyebath conditionerDyebath conditioner

special polyacrylate and special polyacrylate and

dispersing agentdispersing agent

anionicanionic

active content: 26%active content: 26%

stable at HT dyeing conditionsstable at HT dyeing conditions

application amount: 1 - 2 g/lapplication amount: 1 - 2 g/l


Visualization of a dyebath conditioner ?Visualization of a dyebath conditioner ?

The efficiency of a dyebath conditioner is difficult to demonstrate.

The following special filter tests show a combination of dye solubility and soilings...


Filter test methodFilter test method

Treat 100 % greige cotton fabric

LR 1 : 10 soft water 10 °dH (180 ppm CaCO3)

20 °dH (360 ppm CaCO3)

30 minutes at 95°C/ 203°F cool down to the

recommended dyeing temperature of the dye

remove the cotton fabric

In these liquors put• y g/l SARABID LDR• 0.1 g/l dyestuff• 40 g/l Glauber‘s salt• 5 g/l soda ash • 2 ml/l NaOH 38°Bé• treat for 10 minutes at the

recommended dyeing temperature

• filtrate

judge the filters visually


Filter test at 80 °C / 176 °F with 0.1 g/l C.I. Reactive Yellow 138

0 °dH0 ppm

10 °dH180 ppm

20 °dH360 ppm CaCO3

without auxiliary

2 g/l SARABID LDRBenefit prevents dyestuff agglomerations


0 °dH0 ppm

10 °dH180 ppm

20 °dH 360 ppm CaCO3

without auxiliary

2 g/l SARABID LDR

Filter test at 60 °C / 140 °F with 0.1 g/l C.I. Reactive Red 106

Benefit increase of dyestuff solubility


Filter test at 80 °C / 176 °F with 0.1 g/l C.I. Reactive Blue 160

0 °dH0 ppm

10 °dH180 ppm

20 °dH 360 ppm CaCO 3

without auxiliary

2 g/l SARABID LDR

Benefit good dispersing properties


Filter test at 80 °C / 176 °F with 0.1 g/l C.I. Reactive Blue 71

0 °dH0 ppm

10 °dH180 ppm

20 °dH360 ppm CaCO3

without auxiliary

2 g/l SARABID LDR Benefit increase of dye solubility


Filter test at 60 °C / 140 °F 10 °dH with 1 g/l C.I. Reactive Blue 21

Dyestuff with

0.1 g/l FELOSAN RG-N

Dyestuff with

0.1 g/l FELOSAN RG-N

2 g/l SARABID LDR2 g/l SARABID LDR

Residues of nonionic detergents from pretreatment can cause problems with dye solubility.

The solution is the addition of The solution is the addition of SARABID LDRSARABID LDR into the dyebath. into the dyebath.

++


SARABID LDR = dyebath conditionerSARABID LDR = dyebath conditionerExcellent levelling behaviour

for reactive dyes

Increaseof dyesolubility

Good dispersing and sequestering capacity


Demand on end-useDemand on end-use

excellent rinseexcellent rinse to remove electrolyte, alkali, residual dyesto remove electrolyte, alkali, residual dyes

wash offwash offto release and outward diffusion of dye to release and outward diffusion of dye

hydrolysateshydrolysates

cationic fixationcationic fixationto reach the fastness level to reach the fastness level

Excellent durability of reactive dyed goods can Excellent durability of reactive dyed goods can only be obtained if the fabrics are treated after the only be obtained if the fabrics are treated after the dyeing process in the following way:dyeing process in the following way:


Demand on a washing agent for reactive dyesDemand on a washing agent for reactive dyes

good washing off behaviour of reactive dyes speed in washing off blocks renewed uptake of the dye hydrolysate

from the washing liquor good calcium binding and dispersing behaviour no effect on shade no impairment of light fastness good ecological features maximum end use fastness properties


Influence on washing performanceInfluence on washing performance

Dyestuff character and fixation grade of the dye electrolyte content in the soaping bath water quality pH - value temperature and time liquor ratio mechanical effect of the machinery equipment number of soaping baths

chemical character of the washing agentchemical character of the washing agent


Technical performance of our CHT range of soaping agents Technical performance of our CHT range of soaping agents for reactive dyeingsfor reactive dyeings

COTOBLANC NSRmixture of organ. & inorganic compounds, free of tenside22 %100 %, powderanionicadd into hot water and stir0.2 - 0.5 g/l state-of-the-art product best wash off efficiency of

reactive dyeings in soft water < 10°dH, high dyestuff affinity

safes wash baths poor solubility: 70 g/l at 25°C/77°F not recommended for

continuous washing machines with hard water risk of filtrations on

X-bobbins (precipitations with insoluble Ca-salts)

only for reactive dyeings

Chem. character

P - contentActive contentIonic characterDissolvingApplication amountProduct features

MEROPAN DPEmodified polyacrylate & phosphonates1,5 %32 %, liquidanionicin each ratio with water soluble1.0 - 2.0 g/l

excellent soaping behaviour in hard water because of good sequestering properties

good dispersing properties universal product for cellulosics:

suitable as sequestering and soaping agent for reactive, vat, sulphur dyes...


Technical performance of our CHT range of soaping agents Technical performance of our CHT range of soaping agents for reactive dyeingsfor reactive dyeings

COTOBLANC CSLsodium salt of a modified polycarbonic acid

-20 %, liquid, non foaminganionicin each ratio with water soluble 1 - 3 g/l washing agent for reactive

dyeings good soaping efficiency in hard

water with 3 g/l suitable for application in

batchwise and continuous ranges

COTOBLANC CSLsodium salt of a modified polycarbonic acid

-20 %, liquid, non foaminganionicin each ratio with water soluble 1 - 3 g/l washing agent for reactive

dyeings good soaping efficiency in hard

water with 3 g/l suitable for application in

batchwise and continuous ranges

Chem. character

P - contentActive contentIonic characterDissolvingApplication amountProduct features

COTOBLANC KRSmix of polyacrylate + modified phosphonates0.62 %24 %, liquidanionicin each ratio with water soluble1- 3 g/l soaping agent for reactive and

vat dyeings good washing behaviour designed for continuous

wash off processes

COTOBLANC KRSmix of polyacrylate + modified phosphonates0.62 %24 %, liquidanionicin each ratio with water soluble1- 3 g/l soaping agent for reactive and

vat dyeings good washing behaviour designed for continuous

wash off processes


Classification of CHT - soaping agentsClassification of CHT - soaping agents

1. COTOBLANC NSR1. COTOBLANC NSR

2. MEROPAN DPE2. MEROPAN DPE

3. COTOBLANC CSL3. COTOBLANC CSL

4. COTOBLANC KRS4. COTOBLANC KRS

Best soaping performance

Universal dyeing auxiliary

Cheap product,P-free

Continuous wash off processes


Washing off procedure with COTOBLANC NSRWashing off procedure with COTOBLANC NSR

CO Single Jersey, prebleachedThies-Roto Stream® LR 1 : 10Dyeing recipe: 3.0 % Drimaren Turquoise X-B0.5 % Drimaren Brill.Green X-3G

95°C 70°C 50°C 20°C203°F 158°F 122°F 68°F

57

25

14

3,50 2 0,10

10

20

30

40

50

60

% w

ash

off

dye

co

nte

nt

70°C 70°C 95°C 70°C 50°C 20°C

10 min each

wash off performance of COTOBLANC NSR

95°C 70°C 70°C 70°C 50°C 20°C 203°F 158°F 158°F 158°F 122°F 68°F

COTOBLANC NSRCOTOBLANC NSR

Conventional anionic surfactantConventional anionic surfactant

BenefitBenefit reduced rinsing bath after soapingreduced rinsing bath after soaping


Determination of the washing off behaviourDetermination of the washing off behaviour

Special washing test method to evaluate the removal of reactive dye hydrolysate from the fiber

Step 1. Hydrolyse reactive dyestuff with alkali

Step 2. Pad the hydrolysed dye solution with hardness on 100 % cotton fabric under defined conditions = basic fabric

Step 3. Wash test

Treat the basic fabric with white cotton adjacent fabric in ratio 1 : 1

Soap with x g/l washing agent

LR 1 : 20, 98°C / 212°F, 2 x 15 min

judge the basic fabric and the soiling onto the adjacent fabrics


Determination of the washing off behaviourDetermination of the washing off behaviourSpecial test method of washing agents for the removal of

reactive dyestuff hydrolysate

Basic fabric2 x

soaped fabricadjacentfabric 1

adjacentfabric 2 10 °dH

withoutauxiliary

0.25 g/lCOTOBLANC NSR

0.5 g/l COTOBLANC NSR


Determination of the washing off behaviourDetermination of the washing off behaviour

Without soaping agent

0.25 g/l COTOBLANC NSR

1.0 g/l MEROPAN DPE

1.0 g/l COTOBLANC KRS

1 2 3 4 10°dH

1 = padded fabric

2 = padded fabric soaped 2 x

3 = staining on adjacent CO soaped 1x

4 = staining on adjacent CO soaped 2x


Demand on the end use of a reactive dyeingDemand on the end use of a reactive dyeing

Where wet fastness is

of critical importance

is recommended

as an extra insurance and

an essential operation

cationic aftertreatmentcationic aftertreatment


Demand on an ideal cationic fixing agentDemand on an ideal cationic fixing agent

improvement of the wash and contact fastnesses prevents migration during drying protects dye / fiber bound of reactive dyes against hydrolysis

and thermocracking broad application range for different dye classes and fibers no influence on shade and on light fastness no adverse effect on handle no impairment of the sewability no deterioration of rewettability formaldehyde and heavy metal free for application on all kind of machines low price


REWIN MRTREWIN MRT

Polyammonium compound

excellent improvement of contact fastnessesno shade changeno deterioration of light fastnessprevention of hydrolysisno influence on the handle and the re-wettability free of formaldehyde

no or only minimum improvement of the wash fastness

application : 2 - 3 %


Fastness improvement with REWIN MRTFastness improvement with REWIN MRT

CO CV

without fixative

2 % REWIN MRT

3 % REWIN MRT

CO WO

Wash fastness 60°C EN ISO 105 - C06 - C2S Water fastness EN ISO 105 - E01

4 % Levafix Scarlet E-2GA

without fixative

2 % REWIN MRT

3 % REWIN MRT


REWIN MRTREWIN MRT

012345

Wash fastness 40 °C/104 °F


Contact/wet fastness

Reactive dyes

Direct dyes

Stripping behaviour andredyeability

Shade change

Product costs at saturation


REWIN ACPREWIN ACPPolyammonium compound, copolymer good allround product, mainly on reactive dyeings excellent wash fastness levels copolymer = good improvement of washing fastnesses of reactive dyeings good contact fastnesses

no deterioration of the light fastness

no or only small shade changes

no influence on the handle and the re-wettability

free of formaldehyde

recommended for discontinuous application

in pad application dye hydrolysate spots can occur if the reactive dyeings are not rinsed and washed off satisfactioned

application: 2 - 3 %


Fastness improvement with REWIN ACPFastness improvement with REWIN ACP

Wash fastness 60°C EN ISO 105 - C06 - C2S

without fixative

2 % REWIN ACP

CO WO

Water fastness EN ISO 105 - E01

without fixative

2 % REWIN ACP

4 % Bezaktiv Red HE-3B

CA CO PA PES PAN WO


REWIN ACP

012345


Wash fastness 60 °C/ 140°F


Reactive dyes

Direct dyes


Shade change



REWIN TNREWIN TNPolyalkylene polyamine

best improvement of washing fastnesses of direct and reactive dyeings

excellent improvement of wet/contact fastnesses

protection of hydrolysis and migration

suitable for exhaust and pad applicationno influence on the handle and the re-wettability free of formaldehyde and heavy metal

no or only small influence on the light fastness possible

sometimes shade change depending on dyestuff

application: 2 - 3 %


Fastness improvement with REWIN TN

Wash fastness 40°C EN ISO 105 - C06 - A1S Water fastness EN ISO 105 - E01

2 % Solophenyl Blue BFF

without fixative

2 % REWIN TN

2 % REWIN ST

without fixative

2 % REWIN TN

2% REWIN ST

CO CV CO WO


REWIN TNREWIN TN

012345

Wash fastness 40 °C/ 104 °F



Reactive dyes

Direct dyes


Shade change



REWIN DWRREWIN DWR

Reactive polyammonium compoundwash fastness improvement of critical reactive turquoise

and green dyeingsgood wet fastness propertiesexcellent protection of hydrolysis and thermocrackingno or only minimum shade change

high application amount of 4 - 6 %difficult application: pH 7.5 - 8 %, 40 - 50°C/ 104-122°Fdifficult stripping behaviour and redyeability


REWIN DWRREWIN DWR

012345

Wash fastness 40 °C/ 104 °F

Wash fastness 60°C/140°F


Reactive dyes

Direct dyes


Shade change



REWIN OSREWIN OS

Special polyammonium compound with reactive groups to improve wash and wet fastness level of selected direct dyeings

application by exhaust method:

3.0 - 3.5 % REWIN OS 2 ml/l NaOH 38 ° Bé

treat 20 - 30 mins at 40°C / 104°Frinse well and neutralise


Wash fastness improvement with REWIN OSWash fastness improvement with REWIN OS Dyeing ( 1 %), 40 °C / 104 °F wash test, grade 4 can be reached:

Tubantin yellow GR Tubantin orange GGLN 200 % Tubantin pink 2 B Tubantin red F 3 B conc. Tubantin bordeaux 2 BL conc. Tubantin rubine 5 B Tubantin violet BL 200 % Tubantin blue BRR h.c. Tubantin blue GLL 300 % Tubantin green 5 GL conc. Tubantin brown GGL Tubantin brown BLTubantin grey CGLL


Fastness improvement with REWIN OSFastness improvement with REWIN OS

CO WO

Wash fastness 40°C EN ISO 105-C06 - A1S

without fixative

3.5 % REWIN OS

Water fastness EN ISO 105 - E01

without fixative

3.5 % REWIN OS

CO WO

1.0 Tubantin orange GGLN 200%


Overview of various/important REWIN fixativesOverview of various/important REWIN fixatives

REWIN application field improvement of

saturationlimit in %

reactive direct package continuous contactfastness

washfastness

ACP(DD)

2.0 – 3.0(1.0 –1.5)

+ (+) + (+) + +

DWR 4.0 – 6.0 + - + - + +

MRT 3.0 – 3.5 + + + + + -

TN 2.0 – 3.0 + + + + + +

+ well suitable(+) suitable to a certain extent - not suitable


Dyeing process guideline Dyeing process guideline for reactive hot dyes on jetfor reactive hot dyes on jet

Dyeing recipeDyeing recipe0.1 - 0.3 g/l BIAVIN 109 or 1.0 - 2.0 g/l BIAVIN BPA / TCC1.0 - 2.0 g/l SARABID LDRx % reactive dyey g/l salt

z g/l alkali (NaCO3/NaOH)

Wash off0.2 - 0.5 g/l COTOBLANC NSRor1.0 - 2.0 g/l MEROPAN DPEor 1.0 - 3.0 g/l COTOBLANC CSLor1.0 - 3.0 g/l COTOBLANC KRS

Wash off0.2 - 0.5 g/l COTOBLANC NSRor1.0 - 2.0 g/l MEROPAN DPEor 1.0 - 3.0 g/l COTOBLANC CSLor1.0 - 3.0 g/l COTOBLANC KRS

Cationic fixing

2.0 - 3.0 % REWIN ACPor2.0 - 2.5 % REWIN TNor ...

Cationic fixing

2.0 - 3.0 % REWIN ACPor2.0 - 2.5 % REWIN TNor ...

0

20

40

60

80

100

0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320

add auxiliaries add dye

add salt

add alkali

add wash auxiliary addfixative

212

176

140

104

68

°C °F


Dyeing auxiliaries for cellulosic fibersDyeing auxiliaries for cellulosic fibers

Further products ...


Faulty dyeingsFaulty dyeings

1 If a cationic aftertreated cellulosic dyeing (e.g. direct dyeing, reactive dyeing, sulphur...) has to be redyed because of spots, unlevelness, shade...

the cationic fixing agent has to be removed / stripped in the first step


Stripping/Masking of cationic fixativesStripping/Masking of cationic fixatives

5 g/l CHT-DISPERGATOR SMS

x ml/l acetic acid 60 % (pH 4.0 - 4.5)

30 mins at 98°C / 212 °F

rinse well

repeat the treatment


CHT-DISPERGATOR SMSCHT-DISPERGATOR SMS

amine salt of naphthalene sulphonic acid anionic liquid easy handling foamfree universally applicable dispersing agent levelling agent special stripping agent application: 1 - 5 g/l

(according to application procedure)


Faulty dyeingsFaulty dyeings

2 Dyed fabrics in rope form with fiber fluff, pillings, abrasion spots,fibrillation...

Bio - polish treatmentSurface treatment


BEIZYM UL - BEIZYM UL - Surface treatment agentSurface treatment agent

Cellulase with broad application spectrum

Chemical Character : Special cellulase blend, non ionic

Properties : - removal of fiber fluff, abrasion spots and pillings

- defibrillation of Lyocell fibers

- improvement of the handle

- useful for enzymatic stone wash of jeans

- small influence on tensile strength



• Application recommendation• Machine equipment: jet, overflow, tumbler• Fibers: all cellulosic fibers Application amount: 0.5 - 1.5 % BEIZYM UL

(depending on effect)• Liquor ratio: 1 : 5 - 1 : 20• Temperature: 45 - 55°C / 113 - 131 °F• pH value: 4.5 - 5.5 (adjust before enzyme

addition, mainly with acetic acid and sodium acetate)

• Time: 20 - 60 min (depending on effect)

Enzyme stop: increase pH with soda ash up to 9 or temperature increase to 85 - 90°C / 185 - 194°F



Bio - polish with BEIZYM UL

basic fabric with pills 1.0 % BEIZYM UL


For further questionsFor further questions

Just contact us !Just contact us !

dyeing of cellulosic fabrics with reactive dyes

Documents

e dyeing auxiliaries

susanne ehret technical

elled dyeing

catalase bf chtcatalase

important dyeing parameters

parts chtcatalase fts

comple e

chtchtcatalase bf