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GB2032468A - Continuous Dyeing Process for Polyester/Cellulosic Blends - Google Patents

Continuous Dyeing Process for Polyester/Cellulosic Blends Download PDF

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Publication number
GB2032468A
GB2032468A GB7928749A GB7928749A GB2032468A GB 2032468 A GB2032468 A GB 2032468A GB 7928749 A GB7928749 A GB 7928749A GB 7928749 A GB7928749 A GB 7928749A GB 2032468 A GB2032468 A GB 2032468A
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United Kingdom
Prior art keywords
sodium silicate
thermosoling
dyestuffs
polyester
dyestuff
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7928749A
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GB2032468B (en
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Hoechst AG
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Hoechst AG
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Filing date
Publication date
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Publication of GB2032468A publication Critical patent/GB2032468A/en
Application granted granted Critical
Publication of GB2032468B publication Critical patent/GB2032468B/en
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Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06PDYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P3/00Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
    • D06P3/82Textiles which contain different kinds of fibres
    • D06P3/8204Textiles which contain different kinds of fibres fibres of different chemical nature
    • D06P3/8223Textiles which contain different kinds of fibres fibres of different chemical nature mixtures of fibres containing hydroxyl and ester groups
    • D06P3/8238Textiles which contain different kinds of fibres fibres of different chemical nature mixtures of fibres containing hydroxyl and ester groups using different kinds of dye
    • D06P3/8252Textiles which contain different kinds of fibres fibres of different chemical nature mixtures of fibres containing hydroxyl and ester groups using different kinds of dye using dispersed and reactive dyes
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06PDYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P3/00Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
    • D06P3/34Material containing ester groups
    • D06P3/52Polyesters
    • D06P3/54Polyesters using dispersed dyestuffs
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06PDYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P3/00Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
    • D06P3/58Material containing hydroxyl groups
    • D06P3/60Natural or regenerated cellulose
    • D06P3/66Natural or regenerated cellulose using reactive dyes

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Coloring (AREA)

Abstract

Process for the single-bath, single-stage continuous dyeing of polyester/cellulosic blends according to a thermosol process at above 200 DEG C, wherein the textile material is padded with an aqueous liquor containing a disperse dyestuff and a reactive dyestuff together with an alkaline fixing agent consisting of a mixture of sodium silicate and disodium phosphate and fixing the dyestuffs by thermosoling in the absence of urea. The thermosoling may be carried out without intermediate drying. The sodium silicate is used in liquid form and does not impair the strength of the textile. A larger number of reactive dyes can be used in the process. Auxiliaries can be added to the padding liquors.

Description

SPECIFICATION Continuous Dyeing Process for Polyester/Cellulosic Blends The present invention relates to a process for the single-bath, single-step continuous dyeing of textile blends of polyester fibres and cellulosic fibres using disperse dyes and reactive dyes according to a thermosol process at a temperature above 2000C.
Processes of this type have been described in the literature (cf. Chemiefasern 13 (1963), pages 434-438, Melliand Textilberichte 47 (1966), pages 1 170--1 174 and pages 1284-1291 and 47 (1967), pages 1433-1440) and are also known from experiments in practice, but such processes have not yet been established in dyeing practice because of serious disadvantages. These are due mainly to the fact that the alkalis used hitherto, mainly soda or sodium bicarbonate required for the fixation of the reactive dyes act unfavourably on the yield of the disperse dyes during the dyeing, in particular at the high temperatures above 1 9000 required for the fixation of the disperse dyes.
The disperse dyes may even be destroyed at a temperature above 2000C under these alkaline conditions. Moreover the alkalis impart a considerable yellow tinge to the cellulose fibre component.
When carrying out fixation at lower temperatures in order to prevent the latter phenomenon, an unsatisfactory fixation of the disperse dyes results. Fixation of the reactive dyes according to this known method moreover requires urea, which decomposes thermally at the required high temperature and forming ill-smelling fogs that irritate the mucous membranes.
Consequently, an object of the present invention is to develop a process for the continuous dyeing of polyester/ceiluiosic blends according to a single-bath, single-stage thermosol dyeing process which does not have the above-described disadvantages and which guarantees good dyestuff yields for both classes of dyestuffs.
This object is achieved according to the invention as follows: the textile fabric is padded with an aqueous liquor containing in addition to both types of dyestuffs a mixture of sodium silicate and disodium phosphate as the fixing alkali, dyestuff fixation being carried out by thermosoling in the absence of urea. In general 8 to 1 5 cm3/l of sodium silicate having a specific gravity of from 1.3 to 1.5 and 3 to 8 g/l of disodium phosphate in crystalline form are added to the padding liquor, a mixture of 10 cam3/1 of sodium silicate and of 5 g/l of disodium phosphate in crystalline form being preferably used.
Thermosoling is generally carried out without previous drying.
Said fixation alkali mixtures make sure that the chemical resistance of the disperse dyes is not impaired and that a complete fixation of the reactive dyes takes place. Moreover a yellowing of the cellulosic fibre portion can be kept at a negligible level in spite of the high thermosoling temperatures.
The sodium silicate used in accordance with the present invention is in liquid form and has the formula Na2O . x SiO2 (x being 3 to 5). Any fears that high amounts of SiO2 might remain in the fibrous structure whereby the strength of the fibrous structure would be impaired have surprisingly not been supported. On the contrary, analyses have shown that the quantity of SiO2 in the fibres after the pretreatment of the fabric to be dyed is greater than that applied thereto during dyeing and that the quantity of sodium silicate applied in accordance with the invention can be washed out almost quantitatively by the usual aftertreatment operations.
The novel process has the further advantage that a greater number of reactive dyes can be used when compared with conventional processes using soda or sodium bicarbonate as fixation alkalis, since when a mixture of sodium silicate and disodium phosphate as fixation alkali is used the hitherto existing restrictions as to the use of reactive dyes no longer applies.
To carry out the process of the invention the disperse dyes are dispersed in the usual manner and subsequently mixed at a temperature of from 20 to 250C with the dissolved reactive dyes to provide about 9/10 of the final volume of the requiring padding liquor. The fixation alkali is dissolved in the residual 1/10 volume of the liquor in an amount of from 10 to 20 g/l in total so that when uniting the 9/10 volume of the padding liquor with the 1/10 volume a total concentration of fixation alkali of from 8 to 1 5 cm3/l of sodium silicate and from 3 to 8 g/l of disodium phosphate is obtained.Immediately before the padding, the two liquors that have been separately prepared are mixed with one another by means of a dosage pump at a ratio of 9:1 and the resulting mixture is used for padding a polyester/cellulosic fabric with a liquor absorption in the range of from 50 to 70%, calculated on the weight of the dry fabric. The treated textile material is then submitted to thermosoling, if desired without intermediate drying, for 30 to 1 20 seconds, preferably for 60 seconds, at a temperature above 2000C, preferably between 210 and 2200 C, to fix both types of dyestuff.
To complete the dyeing process the fabric is submitted to the usual aftertreatment in order to remove dyestuff particles that have not been fixed or auxiliaries and chemicals that are no longer required. Light colourations merely required a simple rinsing with water.
If required, auxiliaries for example wetting agents, migration-inhibiting auxiliaries and the like may be added to the padding liquors.
The present invention can naturally be carried out with intermediate drying according to a conventional thermosol process but this procedure affects somewhat the washing out of the sodium silicate. Suitable reactive dyes for dyeing the cellulosic fibre portion according to the present invention are the organic dyestuffs known under this designation independent of their reactive group. This class of dyestuff is designated as "Reactive Dyes" in the Colour Index, 3rd edition, 1971. Dyestuffs of this type mainly contain one group that is capable of reacting with polyhydroxyl fibres, a precursor thereof or a substituent capable of reacting with polyhydroxyl fibres.The organic dyestuffs may in particular be selected from the azo, anthraquinone and phthalocyanine series, the azo and phthalocyanine dyestuffs being optionaily metalliferous or free from metals. Examples of suitable reactive groups and of precursors thereof forming a reactive group in an alkaline medium include epoxy groups, the ethylene imide group, the vinyl grouping in the vinylsulphone or in the acrylic acid radical, the /3- sulphatoethylsulphone group, the p-chloroethylsulphone group or the ,!3-dialkylaminoethylsulphone group. Moreover, derivatives of the tetrafluorocyclobutyl series, for example of tetrafluorocyclobutylacrylic acid may be used for this process.Suitable reactive substituents in the reactive dyes are those that can be split off readily and leave an electrophilic radical. These substituents may be, for example, 1 to 3 halogen atoms in the following ring systems: quinoxaline, triazine, pyrimidine, phthalazine, pyridazine and pyridazone. Dyestuffs containing several identical or different reactive groups may also be used.
Suitable disperse dyes for dyeing the polyester fibre component are any of the water-soluble dyestuffs listed in the Colour Index, 3rd edition 1 971 as "Disperse Dyes". They may be selected from the azo, anthraquinone or quinophthalone dyestuffs series, the azo dyestuffs being optionally metalliferous or free from metals. Dyestuffs of this class are commonly known.
The following examples illustrate the invention: Example 1 A padding liquor was prepared at 250C from 850 parts by volume of water containing in dispersed form 30 parts by volume of blue disperse dye (in commercial form and consistency), this dye consisting of a mixture of 40 weight % of a dyestuff of the formula
and 60 weight % of the dyestuff of the formula
17 parts by weight of the dyestuff Reactive Blue 19 (C.l. No. 61200) were dissolved in a further 50 parts by volume of water. Both liquors were combined (I).
10 parts by volume of sodium silicate having a specific gravity of 1.37 and 5 weight parts of disodium phosphate in crystalline form were then dissolved in 90 parts by volume of water at 250C (it).
Immediately before padding liquors I and II were combined. The resulting padding liquor was used for padding a blend consisting of 67% of polyester fibres and 33% of cotton with a liquor take-up of 60%, calculated on the weight of the dry material.
Without intermediate drying the treated fabric was submitted to a thermosol process for 60 seconds at 21 00C, subsequently rinsed with water and aftertreated at the boil for 10 minutes with an aqueous bath containing 0.5 g/l of the reaction product of 1 mol of nonylphenol and of 10 mols of ethylene oxide.
After drying a uniform, deep blue coloration on both fibres portions was obtained. the quality of the disperse dye was not unfavourably affected, since the shade was clear and the cellulosic fibre had not become yellow.
Example 2 According to Example 1 an aqueous padding liquor was prepared at 200C from 2 g/l of the disperse dye of the formula
and 1 gil of the reactive dye of the formula
900 parts by volume of liquor I were thus obtained to which were added 3 g/l of a wetting agent based on a combination of a sodium alkyl sulphonate and 10% of the reaction product of 1 moi of isotridecanol and 8 mols of ethylene oxide. The fixation alkali mixture (liquor II) contained 8 cm3/1 of sodium silicate having a specific gravity of 1.32 and 3 g/l of disodium phosphate in crystalline form.
Both liquors were subsequently mixed.
The resulting padding liquor was used for padding at 200C a blend consisting of 67% of polyester fibres and of 33% of cotton with a liquor take-up of 70%, calculated on the weight of the dry goods.
Without intermediate drying the textile goods were submitted to a thermosol process for 60 seconds at 21 00C and subsequently aftertreated in the manner described in Example 1. A uniform lilac coloration was obtained. The shade was not affected by the fixing alkali.
Analysis of the cryde fabric for SiO2 prior to dyeing gave an index of 578 SiO2 which can be attributed to the delustering of the polyester fibre. The dyed fabric had an index of 553 Six2.
Example 3 A padding liquor was prepared at 250C as described in Example 1 from 10 g/l of the dyestuff Disperse Orange 13 (C.l. No. 26080), 0.3 g/i of the dyestuff Disperse Blue 56 (C.l. No. 63285), and 7 g/l of the reactive dye of the formula
10 cm3/l of sodium silicate having a specific gravity of 1.5 and 3 g/l of disodium phosphate in crystalline form were used for fixation.
The dyeing was carried out as in Example 1 and a uniform sand coloration was obtained.
Example 4 The procedure was as in Example, except that 10 g/l of the disperse dye of the formula
and 8 g/l of the reactive dye of the formula
were used. The quantity of fixation agent was the same as that used in Example 1.
A clear orange coloration on both fibre portions was obtained. When carrying out dyeing with intermediate drying at 1 300C, the result was the same.
Example 5 Dyeing was carried out as described in the preceding Examples using the following quantities of dyestuffs and fixation agents: 20 g/l of the dyestuff Disperse Brown 1 (C.l. No. 11152), 4 g/l of the reactive dye of the formula
10 cm3/1 of sodium silicate having a specific gravity of 1.3, and 5 g/l of disodium phosphate in crystalline form.
A two colour dyeing was obtained, in which the polyester fibre portion was coloured brown and the cotton portion coloured green.
Example 6 A fibre blend was dyed according to the prescription given in Example 1. The padding liquor used for this purpose contained: 17 g/l of the red disperse dye of the formula
6 g/l of the dyestuff Reactive Red 22 (C.l. No. 14825), and 1.8 g/l of the reactive dye of the formula
12 cm3 of sodium silicate having a specific gravity of 1.4, and 5 g/l of disodium phosphate in crystalline form.
A dull red coloration on both fibre portions was obtained.

Claims (9)

Claims
1. A process for the single-bath, single-stage continuous dyeing of polyester/cellulosic blends using disperse dyes and reactive dyes according to a thermosol process at a temperature above 2000C, which comprises padding the textile material with an aqueous liquor containing both types of dyestuffs and a mixture of sodium silicate and disodium phosphate as the alkaline fixing agent and fixing the dyestuffs by thermosoling in the absence of urea.
2. A process as claimed in claim 1, which comprises using as alkaline fixing agent a mixture of from 8 to 1 5 cm3/l of sodium silicate having a specific gravity of from 1.3 to 1.5 and 3 to 8 g/l of disodium phosphate in crystalline form.
3. A process as claimed in claim 1 or claim 2, which comprises carrying out thermosoling of the padded textile material without previous intermediate drying.
4. A process as claimed in any one of claims 1 to 3, wherein the sodium silicate is used in liquid form and has the formula Na2O . x SiO2 wherein x=3 to 5.
5. A process as claimed in any one of claims 1 to 4, wherein the thermosoling is carried out for 30 to 120 seconds at a temperature between 2100 and 2200C.
6. A process as claimed in any one of claims 1 to 5, wherein a wetting agent or a migrationinhibiting auxiliary is used.
7. A process as claimed in any one of claims 1 to 6, wherein a dyestuff of any of the classes specifically mentioned herein is used.
8. A process as claimed in claim 1 conducted substantially as described herein or in any one the Examples.
9. Textile material whenever dyed by a process as claimed in Claim 1.
GB7928749A 1978-08-19 1979-08-17 Continuous dyeing process for polyester/cellulosic blends Expired GB2032468B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2836417A DE2836417C2 (en) 1978-08-19 1978-08-19 Continuous color process for polyester fiber / cellulose fiber blended fabric

Publications (2)

Publication Number Publication Date
GB2032468A true GB2032468A (en) 1980-05-08
GB2032468B GB2032468B (en) 1982-09-15

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ID=6047489

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Application Number Title Priority Date Filing Date
GB7928749A Expired GB2032468B (en) 1978-08-19 1979-08-17 Continuous dyeing process for polyester/cellulosic blends

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JP (1) JPS5530495A (en)
DE (1) DE2836417C2 (en)
FR (1) FR2433605A1 (en)
GB (1) GB2032468B (en)
IT (1) IT1122791B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5106388A (en) * 1990-02-06 1992-04-21 Ciba-Geigy Corporation Process for printing cellulosic textile material with reactive dyes: print paste free of urea; wetting of dried printed fabric prior to fixing
CN110670382A (en) * 2019-09-28 2020-01-10 关会堂 Flexible anhydrous printing and dyeing method for thick polyester textiles

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1769157A1 (en) * 1968-04-13 1971-04-01 Hoechst Ag Process for the simultaneous heat setting of disperse and reactive dyes on mixtures of synthetic fibers and cellulose fibers
DE1909518C3 (en) * 1969-02-26 1974-08-29 Farbwerke Hoechst Ag, Vormals Meister Lucius & Bruening, 6000 Frankfurt Process for the single bath dyeing of mixtures of polyester and cellulose fibers
DE2033784C3 (en) * 1970-07-08 1978-12-21 Hoechst Ag, 6000 Frankfurt Process for the production of real dyeings or prints on cellulosic fiber materials
DE2343317B2 (en) * 1973-08-28 1976-08-12 Bayer Ag, 5090 Leverkusen TEXTILE COLORING AND PRINTING PROCESS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5106388A (en) * 1990-02-06 1992-04-21 Ciba-Geigy Corporation Process for printing cellulosic textile material with reactive dyes: print paste free of urea; wetting of dried printed fabric prior to fixing
CN110670382A (en) * 2019-09-28 2020-01-10 关会堂 Flexible anhydrous printing and dyeing method for thick polyester textiles

Also Published As

Publication number Publication date
JPS5530495A (en) 1980-03-04
GB2032468B (en) 1982-09-15
IT7925155A0 (en) 1979-08-17
FR2433605A1 (en) 1980-03-14
DE2836417C2 (en) 1980-04-24
DE2836417B1 (en) 1979-08-16
IT1122791B (en) 1986-04-23

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