DE19633101A1 - Continuous wet on wet dyeing and transfer printing of fabric at relatively low temperature without intermediate drying - Google Patents

Abstract

Continuous dyeing to pattern fabrics, especially in breadth form, comprises (a) impregnation with a dye liquor and bringing to a uniform moisture content over the entire surface area; (b) contacting the wet fabric with a re-usable breadth of film, printed with a patterning agent, under pressure at a temperature \} 60 deg C, to transfer the pattern to the textile; and (c) steaming the wet fabric, then washing and drying. There is no intermediate drying between stages (a), (b) and (c). Also claimed is the equipment used in this process.

Description

The invention relates to a method for continuous Chen patterns of textile fabrics, especially in Form of webs.

It is known to separate textile webs to dye, print and dampen directions. At the With this process, the goods are first colored over the entire surface and then washed and dried. The dry goods is then in a separate facility in one after switched process step printed and again ge dries. Then in another process the goods were steamed, washed and dried again net. Such wet processes, so with several intermediate Drying is very expensive and ar with a large excess of dye, but not required dye must be disposed of.

Furthermore, it is known to be colored or impregnated Material webs after impregnation and drying in the so-called dry transfer process in the hot calender using a Print medium, e.g. B. to print on a printing paper on which the pattern was applied in one printing process  and which is then with the print order on that of the goods side facing the web together with the web at passed through a calender at a temperature above 100 ° C becomes. This was done by dyeing and patterning a wa renbahn again in two work steps, of which the second is energy-intensive due to the increased temperature. The About The sample is transferred to the web weighed by sublimation, what the circle of usable Dyes constrict.

In addition to the dry transfer process, in which the The web is dry when the pattern is transferred, there is the wet transfer process, in which the transfer pattern on a damp or wet web is taken. Examples of this are in DE-AS 19 12 632 and DE-OS 21 22 805 described, in which the transfer sampling at temperatures around 100 ° C and during a longer exposure takes place, which in DE-OS 21 22 805 can take up to ten minutes. Such a action times can only be applied to static presses, e.g. B. Plate presses achieve what a continuous job process makes impossible.

In the case of wet transfer processes, it is also known that the Qua sampling through the use of transfer liquid to improve. In DE 37 32 489 A1, the color an additive is added when transferring to wash them makes firm. In DE 27 57 630 the sample to be sampled Material web wetted with a color-dissolving liquid and the print carrier is then pressed on, the pattern of the print carrier lighter yet sharp on the Goods web passes over.

DE 27 02 300 A1 describes a wet transfer printing process drive out in which the substrate to be printed before forth with an aqueous or "organic" network fleet in is impregnated. The excess impregnation solution will squeezed and the wet substrate at temperatures around 100 ° C in close contact (e.g. in the calender) with the printed Subcarriers brought. After removing the subcarrier  the dye in the usual way - if necessary after predrying - by steaming or thermosoling fixed.

With this method, too, is the economy due to the need for high temperature at the over not guaranteed.

The invention is based, the sample design of textile webs more economically and at the same time high fastness properties, particularly in pile fabrics (e.g. automotive fastness / fakra or Ford exposure) to reach.

This object is achieved with a method according to claim 1 solved.

In the vast majority of cases it is the sample also by a color, albeit by a exemplary.

It is achieved by the invention that the surface area form in one go, d. H. without energy-intensive intermediate drying plain-colored and into this fund with a Samples can be provided by the preparation from the impregnation with the coloring liquid still damp fund particularly well in the material of the area is able to penetrate and thus in particular Polware good color and generally high fastness properties results.

An important aspect is the reuse of the Printing medium, which therefore does not "accept the patterning agent ", but can be easily freed from the remains of the same must be able to. Through the reusability of the print The cost share of producing the sample remains the carrier on the fabrics at a low height.

An important advantage of the method according to the invention is that the amount of the sample agent, wel ches is applied to the print carrier, e.g. B. in one Screen printing process, can be dosed so that just that need at a certain point in a fabric amounts are available and transferred, so that  not, as with the conventional printing process, excess Amounts of dye removed by appropriate washing processes Need to become. The water consumption decreases significantly tend. There is also a much lower Bela environment by critical z. B. heavy metal Components of patterning agents in the form of colors, that pass into the wash water.

Even if the colored sampling by applying a Colorant the preferred embodiment of the invention other procedures are not excluded sen, e.g. B. Types of reservation treatment. The same is true continuous patterning of webs preferred without the Exclude sampling of piece goods.

In the preferred embodiment of the invention the patterning agent according to claim 2 in liquid, moist or pasty state on the plastic film brought because this depends on the handling of the sample is the easiest way to do it. An on bring in dry form, e.g. B. electrostatically under supports, but is not excluded.

In a first alternative, the sample agent dried on the plastic film before it evened with the surfaces is brought together (claim 3).

This not only facilitates the handling of the samples plastic foils, but also allows a stockpile tion of patterned plastic films according to claim 4, the gege if necessary, also at another point (e.g. in a sieve printing shop) as the location for sampling the fabrics can be provided with the sample agent.

The plastic film is useful in claim 5 reproduced in a reproduced manner.

However, an alternative is also considered the application of the sample agent in one go the patterning of the fabrics and the transfer of the Sample agent in a not yet dried state, that is the simultaneous work both on the slide and on the fabrics (claim 6).  

Impregnation, steaming and washing are advisable at the values given in claims 7 to 9.

Claim 10 is considered for the fabrics incoming materials.

In order to adapt to the respective circumstances emp it is necessary to apply pressure to the fabric at Transfer and make the contact time adjustable (An Proverb 11).

Values that are considered in practice are contradictory stood of claim 12, wherein the shorter values of the contact time can be realized by rolling gaps, the longer ones Values e.g. B. in an arrangement with a roller on a significant part of its scope from a revolving endlo is tied around his band.

In many cases it can be useful for the Im impregnate and sample the same type of liquor to use (claim 13).

The film comes for reasons of stability and reasons the correct behavior towards the sample agent a solid plastic film (claim 14), in particular one Polyester film from 0.03 to 0.20 mm thickness is considered (An Proverbs 15). Other foils, e.g. B. made of plastic coated Paper, from dimensionally stable rubber or from metal such as Aluminum or thin steel band, but are not made closed.

The surface pressure arrangement in which the surfaces structures are brought together with the patterned film, is one in the preferred embodiment of the invention at least one roll gap forming roll arrangement which the fabrics are passed through (claim 16).

The impregnation of the fabrics with the sample Means can z. B. in a foulard. The "whale zenanordnung "can be the squeeze mechanism of the foulard (Claim 17), in which the print carrier with the Bemu from above sterile agent. This embodiment of the process rens assumes, however, that the occupancy of the fabrics over their surface with the impregnated paint liquor  sufficient before reaching the nip is even, e.g. B. by a before entering the Pinch off the foulard.

An alternative embodiment sees a foulard and an additional squeeze mechanism downstream of this before, which forms the "roller assembly" (claim 18). The In this case, the fouling mechanism of the foulard served only the one provision of a sufficiently uniform moisture distribution.

The "roll assembly" can be one or more roll nips form te in which the rollers directly against each other work and through the fabrics with the print medium be passed through together.

The system pressure zones in this case are the roll gap te, which is only a small one in the running direction of the fabrics Have expansion and only short contact times enable. From this point of view can happen recommend several consecutive nips. An alternative embodiment of the invention includes Pressure application arrangement of a device with one in um direction of a roller extended plant pressure zone, the z. B. by partially wrapping the roller with a endlessly circulating, under longitudinal tension or pressed by a concave pressure thrust in Be dress.

The invention is also implemented in a Ver drive adapted system according to claims 19 and 20.

Two embodiments of such a system are shown schematically in FIGS. 1 and 2.

The system shown is used for colored sampling of a textile web 1 , which runs in accordance with FIG. 1 of the drawing in the direction of the arrow into the trough 2 of a foulard as a whole with 10 be marked and is impregnated there with the dye liquor 3 located in the trough 2 .

In a first alternative embodiment of the method, the web 1 then runs through the nip pair 4 of the foulard 10 . At the same time, a film 5 runs from a roller 6 through the nip of the nip rollers 4 , which has previously been pattern-coated on one side with a colored sample agent, which can be pulled onto the textile web 1 . After the application of the sampling agent, it was dried on the film 5 , so that the film 5 could be wound up into a roll 6 . The order side faces the web 1 in the roll gap 4 of the pair of squeeze rolls 8 .

Due to the pressure exerted in the nip 4 , the patterning agent is transferred from the film 5 to the web 1 . The pair of squeeze rollers 8 thus exercises both the function of uniform dehumidification and the function of the surface pressure arrangement.

After passing through the pair of squeeze rollers 8 , the textile material web enters immediately, ie without intermediate drying, into a damper 7 and is then washed in a washing machine 9 in the usual manner.

In the procedure described above, care must be taken to ensure that the moisture distribution on the web 1 after leaving the dye liquor 3 in the trough 2 of the foulard 10 is sufficiently uniform before the web 1 comes together with the film 5 . For this reason, it will generally be necessary in this embodiment to provide a comparative Entfeuchtungsvor direction, for example in the form of a stripping arrangement 11, only indicated in Fig. 1 before entering the roll gap 4 .

In the embodiment of FIG. 2, a stripping device 11 is not required. Here, the film 5 is not already in the nip 4 of the Quet roller pair 8 together with the web 1 . Rather, the pair of squeezing rollers 8 is used here only to adjust the moisture content of the web 1 after impregnation with the patterning agent 3 . A separate pair of squeeze rollers 18 is provided here, into the roll gap 14 of which the web 1 runs in after leaving the foulard 10 . In this case, the pair of squeeze rollers 18 forms the surface pressure arrangement in which the film 5 is brought together with the goods web 1 . After the transfer of the sample, the web 1 is also passed without intermediate drying in the damper and then the washing machine 9 .

In both cases, the film 5 is separated after passing through the respective surface pressure application arrangement 8 and 18 again from the web 1 before it enters the damper 7 , and after cleaning in a cleaning device 15 again on a roll 16 , whereupon it is available for reapplication with sample agent.

The following examples serve to explain the he inventive method without restricting it.

example 1

• a) A Raschel plush fabric made of polyethylene terephthalate (Trevira 220) is dyed / impregnated with the following liquor:
  One liter of treatment liquid 3 in the trough 2 of the foulard 10 contains the following dyes: 2.0 g / l modified guar flour (modified by thermal degradation);
  2.3 g / l C'I Disp. yellow 42;
  0.59 g / l C'I Disp. red 190;
  0.3 g / l C'I Disp. violet 38;
  1.23 g / l C'I Disp. blue 87;
  25.0 g / l ammonium salt of a partially sulfated adduct of nonylphenol with 5.5 mol EO (EO = ethylene oxide);
  10.0 g / l sulfosuccinic acid 2-ethyl-ethyl ester-NA salt;
  15.0 g / l benzyloxypropionitrile.
• b) The print medium (slide 5 ) is with the same C'I Disp. Colorants coated as a paste.
• c) The textile fabric 1 is dyed / impregnated on the pad 10 with 95% liquor absorption in a system according to FIG. 1 and is moved through the roll gap 4 with the printing medium (film 5 ).

The goods are then steamed in the steamer 7 for 10 min at 100 ° C in a saturated steam atmosphere and then washed in the washing machine 9 five times at 30 ° C with water.

It is drained by squeezing to 75% rest wet. The goods are dried for 3 minutes at 180 ° C in a stenter. You get a very same moderate pile fabric with the highest light fastness (Fa kra, Ford) and good general fastness.

Example 2

• a) A flat fabric made of 55% polyester and 45% cotton is pre-fixed for 30 seconds at 190 ° C. Then the fabric 1 is dyed / impregnated in the padder 10 by padding with a dye liquor 3 of the following composition (to 1 liter of treatment liquid): 2.5 g / l of ethoxylated locust bean gum with 1.5 mol of ethylene oxide per HO group;
  3.0 g / l C'I Disp. yellow 42;
  12.0 g / l C'I Disp. yellow 23;
  9.0 g / l C'I Disp. red 190;
  8.0 g / l C'I Disp. blue 87;
  3.55 g / l C'I Direct organs 39;
  4.55 g / l C'I Direct-Red 99;
  3.18 g / l C'I Direct-Blue 256;
  40.0 g / l Na salt of a partially enriched adduct of nonylphenol with 4 mol EO;
  18.0 g / l sulfosuccinic acid 2-ethyl hexyl ester Na salt;
  25.0 g / l benzyloxypropionitrile.
• b) The print medium (slide 5 ) is with the same C'I Disp. and C′I direct dyes as a paste.
• c) The textile fabric 1 is dyed / impregnated on the pad 10 with 85% liquor absorption in a system according to FIG. 1 and is moved through the roll gap 4 with the printing medium (film 5 ).

The flat weave is then at 100 ° C. for 15 minutes steamed in saturated steam, then three times Washed 50 ° C with water, to 75% residual moisture mechanically dewatered and 2.5 min at 190 ° C in Stenter dried. You get a dark red t, evenly colored flat weave with good Fastness.

Example 3

• a) A pile fabric made of polyacrylic fiber with pile (55%) and cotton in the back (45%) is dyed / impregnated by padding with a dye liquor of the following composition: 1.5 g / l guar flour modified by thermal degradation;
  2.0 g / l C'I Basic Yellow 28;
  2.2 g / l C'I Basic Yellow 21;
  6.9 g / l C′I Basic-Red 46;
  3.4 g / l C'I Basic-Blue 159;
  1.8 g / l C'I Direct Orange 30;
  3.3 g / l C'I Direct-Red 80;
  0.8 g / l C'I Direct-Black 112;
  20.0 g / l ammonium salt of a sulfated adduct of nonylphenol with 5.5 mol EO;
  10.0 g / l sulfosuccinic acid 2-ethyl hexyl ester Na salt;
  10.0 g / l benzyloxypropionitrile.
• b) The print medium (slide 5 ) is coated with the same C'I Basic and Direct dyes as a paste.
• c) The textile fabric 1 is dyed / impregnated on the pad 10 with 90% liquor absorption in a system according to FIG. 1 and is moved through the roll gap 4 with the printing medium (film 5 ).

The goods are then at 98 ° C for 10 min steamed in saturated steam and then three times washed at 50 ° C with water.

It is drained by squeezing to 75% rest wet. The goods are dried for 3 minutes at 150 ° C in a stenter.

In all three examples, the printing medium (film 5 ) is dried after being coated with the dyes before it is passed through the squeezing unit 8 together with the sheet 1 in the application unit 10 .

The following are further examples of recipes used for Impregnation of the fabrics and in a thickened form at the same time as a patterning agent for the print medium served:  

Example 4

For acrylic fibers with basic dyes

Example 5

On cotton with reactive dyes

Example 6

Vat packs

Example 7

For PA and wool with acid dyes

Example 8

On cotton with direct dyes

Example 9

For acrylic fibers with basic dyes

Example 10

On cotton with reactive dyes

Example 11

Vat sets

Example 12

For PA and wool with acid dyes

Example 13

On cotton with direct dyes

Claims (20)

1. Process for the continuous patterning of textile fabrics, in particular in the form of webs,
in which the fabrics are impregnated with a dye liquor and brought to a uniform moisture content over the surface,
in which the fabric immediately afterwards without intermediate drying with the moisture content using a reusable printing medium made of a web-shaped film, to which a patterning agent has previously been applied, in a surface pressure application arrangement forming at least one system pressure zone at a temperature of the contact surfaces of the surface pressure application arrangement, the pressure medium and the surface de not more than 60 ° C are brought together and passed through them in such a way that the patterned side is directed against the surface structures and the sampling means passes to the moist surface structure as it passes through the system pressure zone,
and in which the fabric ver seen with the patterning agent is steamed in the wet state in the run without intermediate drying and then washed and dried. 2. The method according to claim 1, characterized in net that the patterning agent in liquid, moist or pasted state applied to the film becomes. 3. The method according to claim 2, characterized in net that the patterning agent dried on the film before it is brought together with the fabric becomes. 4. The method according to any one of claims 1 to 3, characterized in that with the dried Bemu plastic film in one Length of several hundred meters on another roll wound up and ready for sampling in a supply will hold. 5. The method according to any one of claims 1 to 4, characterized in that the plastic film after passing the surface pressure application arrangement of ver permanent residues of the sample agent are exempted, ge dries, rolled up and kept ready for re-laying becomes. 6. The method according to claim 1, characterized in net that the patterning agent on the slide in still liquid, moist or pasty state with the Fabric is brought together. 7. The method according to any one of claims 1 to 6, characterized in that the impregnation with a aqueous dye dispersion to a moisture content of 60 to 250% is done. 8. The method according to any one of claims 1 to 7, characterized in that the damping in a sat steam atmosphere for 1.0 to 20.0 min at 96 to 105 ° C  is carried out. 9. The method according to any one of claims 1 to 8, characterized in that the patterned and muted Sheets at a temperature between 20 and 60 ° C washed one or more times and at one temperature between 140 and 210 ° C for a time of 1.0 and 10.0 min is dried. 10. The method according to any one of claims 1 to 9, characterized in that the fabrics are made as nonwovens, knitted fabrics, knitted fabrics, fabrics or the like in particular as flat or pile fabrics such as velvet, plush or Ve lours, and from one of the materials listed below consist:

• a) polyester, polyamide, polyacrylonitrile and aramid, or
• b) cotton, linen, viscose, wool, silk, acetate and / or
• c) from a mixture of one or more or materials according to a) and b).

11. The method according to any one of claims 1 to 10, characterized in that the fabric and the Film compressive pressure and the contact time of the Fabric with the film inside the system printing area ne set depending on material and sample agent will. 12. The method according to claim 11, characterized in net that of the fabric and the print medium applied pressure between 0.5 and 75.0 daN / cm² and the Contact time between 0.05 and 6 seconds, preferably between between 0.1 and 0.45 sec. 13. The method according to any one of claims 1 to 12, characterized in that for the impregnation of the surfaces  Chengebilden and the sampling of the same type of color flot te is used. 14. The method according to any one of claims 1 to 13, characterized in that a plastic film as the film is used. 15. The method according to claim 14, characterized in net that as a plastic film a polyester film of 0.03 up to 0.20 mm thickness is used. 16. The method according to any one of claims 1 to 13, characterized in that as a surface pressure application order a roll forming at least one roll gap arrangement is used. 17. The method according to claim 16, characterized in net that for impregnation and as a roller arrangement Foulard is used, through its roll gap additionally the film is passed through. 18. The method according to claim 16, characterized in net that a foulard is used for impregnation and the foulard is followed by a roller arrangement, in who brought the film together with the fabric becomes. 19. Plant for performing the method according to one of claims 1 to 18, characterized by the following de plant parts:

• a) a device ( 2 ) for impregnating the surface structures ( 1 ) with a dye liquor ( 3 ),
• b) a device ( 11 ; 8 ) connected downstream of the device ( 2 ) for equalizing and setting the impregnation moisture,
• c) a surface pressure application arrangement ( 8 ; 18 ), in which the impregnation moisture-containing web ( 1 ) is brought together with a pattern ( 5 ) provided with a patterning agent such that the patterned side of the film ( 5 ) faces the web in the surface pressure application zone and the sampling means passes to the web ( 1 ),
• d) one of the surface pressure application arrangement ( 8 , 18 ) immediately downstream damper ( 7 ).

20. Plant according to claim 19, characterized in that means for unwinding the film provided with the dried sampling material ( 5 ) from a roll ( 6 ) and for passing through the web ( 1 ) together through a roll gap ( 4 , 14 ) and to separate the film ( 5 ) from the web ( 1 ) and to rewind the film ( 5 ) before the web enters the damper ( 7 ).