DE3112408A1 - Process for dyeing a fabric web - Google Patents

Abstract

The process for dyeing a fabric web is to be further developed in such a way that a relatively bulky (voluminous) material can be saturated uniformly with dye solution in a continuous operation and that the dye is fixed effectively and uniformly in a very short time. According to the invention, the fabric web is passed continuously through a high-pressure steamer (ager) containing saturated steam at from 100 to 160 DEG C, where it is swelled by the moist heat, and is then saturated to the core with the dye solution, the colour being fixed by the action of the hot saturated steam.

Description

The invention relates to a method for dyeing a voluminous web of fabric. In particular, according to the method for producing carpets, blankets or the like
suitable or intended textile material webs are continuously treated _β

In the continuous dyeing of thick or voluminous textile material webs suitable for the production of carpets, blankets or the like, a color solution has been used up to now
applied at normal temperature and normal pressure
and the color is done with the help of moist heat
Insertion of the fabric web fixed in a normal pressure having saturated steam chamber. With this procedure, however, difficulties arise, inter alia, when the fabric to be treated has a width of more than about 4 »m.

It is very difficult to soak a very thick web of fabric with a long pile at normal temperature up to the core sufficiently and evenly with a dye solution and to fix the color without unevenness. Then when the fabric soaked with the dye solution in
is conventionally squeezed off with the aid of a pair of nip rollers before the saturated steam treatment, the
Squeegee rollers are bent during pressing, in particular, when a relatively wide, thick web of material is to be treated. That
However, the bending of the rollers has a difference in contact pressure
between the middle part and the edge areas of the rollers with a correspondingly unequal effect on the fabric web
as a result, so that an uneven treatment result inevitably follows from this too. In a thick panel

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Finally, the amount of staining solution squeezed off also differs between the core and the surface area the web, whereby the surface parts are generally more squeezed and therefore open after fusing the fabric thickness will result in an uneven dyeing result. On the other hand, if the hue of the surface layers of the If the fabric web is set to the desired value during squeezing, an excess remains in the core of the web Dye solution that is lost e.g. during subsequent washing

With conventional piece dyeing or discontinuous dyeing of individual batches one after the other, the consumption is in terms of heat energy, dye and water not only uneconomically high, but the color tone also fluctuates from Batch to batch, so that defective products are often produced.

The invention is based on the object of creating a continuous process for dyeing elongated thick or voluminous fabrics, which the previous process both in terms of the uniformity of the dyeing result in width, thickness and length of the fabric as well as in terms of energy, color and water is superior. The solution according to the invention consists in the fact that the fabric web is ^{swollen by the action of the damp heat with continuous passage through a high pressure damper containing saturated steam at a temperature in the range from 100 to 160 0} G and then at the inside temperature of the damper with the help of means for applying a dye solution with this everywhere is soaked up to the core, whereupon the color on the fabric web by the action of the damp

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Heat is fixed inside the damper.

In the method according to the invention, the voluminous substance is swelling in a high-pressure steam or afterwards the swelling of the material of the fabric web soaked evenly with a dye solution and treated with moist heat, so that the material can be colored effectively and evenly in a continuous process in a relatively short time is. It goes without saying that the method according to the invention is not only applicable to thick or relatively voluminous products, but rather generally also to be used on thinner fabrics.

In the method according to the invention, the swollen state of the fabric can either be immersed in the dye solution or by spraying the dye solution in the steamer with the dye solution soaked in such a way that the latter even with a very thick material, it is evenly and satisfactorily absorbed into the core in a relatively short time will. The fabric soaked with the dye solution then becomes higher with saturated steam to fix the color Heat-humid treated at high temperature and high pressure.

On the basis of the schematic drawing of a cross section of an embodiment of a device for performing the dyeing process, the invention is explained in more detail.

According to the exemplary embodiment, a thick fabric web suitable for producing a carpet, a blanket or the like is used 1 continuously passed through a high-pressure damper 2 with long pile inserted or formed by roughening. The latter is equipped with a substance inlet 5 and a substance outlet

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let 4 provide. These are equipped with an inlet lock 5 and outlet lock 6 in order to achieve that a saturated steam at high temperature and under high pressure is to be maintained inside the damper 2. The respective Lock 5 or 6 can be on any, for example already proposed by the applicant, Train wise. A detailed description can therefore be omitted here.

In the vicinity of the substance inlet 3 within the damper 2, dye troughs 7 ^ and 7 o are arranged. In the staining troughs 7.J and 7 ₂ , a constant amount of staining solution 8 is constantly maintained during operation. In the vicinity of the fabric outlet 4 of the damper 2, a rinsing trough 9 is arranged, which is intended to contain a constant amount of hot water 10 for cleaning the treated fabric web 1 at all times. The web of material is guided up and down through the damper 2 in a zigzag over several guide rollers 11 and treated with moist heat or with saturated steam. The temperature of the saturated steam within the steamer 2 can be set in the range between 100 and 160 ^° C. in accordance with the properties of the substance to be treated and / or of the dye used. The ones above in the color troughs 7 * and 7? The web of fabric 1 immersed in the paraffin solution 8 while the guide rollers 11 are running can be partially squeezed off after surfacing with the aid of stripping rods or rollers 12. In the exemplary embodiment, a drip protection plate 13 is arranged in particular above the area of the guide rollers 11 in order to prevent water drops from falling from the ceiling of the damper 2 onto the fabric web 1. The latter is removed at the end via a cooling and sealing trough 14 provided in the outlet lock 6

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out the damper 2.

With the aid of the aforesaid means, a thick sheet of fabric can be continuously made in the following manner, for example to be colored:

First, superheated steam is blown 15O ⁰ G in the damper 2 of, for example, to produce a saturated steam atmosphere in the interior thereof. A staining solution 8 is then poured into the staining troughs 7-j and 7? and hot water 10 is poured into the sink 9. The dye solution 8 and the hot water 10 are therefore ^{heated to approximately 150 °} C., namely the temperature inside the steamer 2. The hot and humid treatment temperature is preferably from 130 to 150 ^° C.

After these preparations, a thick fabric 1 to be dyed is introduced into the damper 2 via the inlet lock 5. The hot and humid atmosphere in the damper 2 immediately causes the material of the fabric to swell. That The product so swollen is immersed in the successive staining trays 7-j and 7o, respectively. Here the Soak the fabric quickly and sufficiently with the dye solution right down to the core. By taking place after each dive Squeezing or stripping with the help of the rods 12 is an excess of dye solution 8, especially in the Surface area of the fabric, removed in each case, so that the same dye content can be achieved throughout the fabric is. The fabric 1 prepared in this way is inside the steamer 2 in a sufficient amount for uniform and rapid color fixing Way already when running over the other

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rollers 11 treated with the damp heat. The panel is then pre-washed when running through the hot water 10 in the washing tank 9, when passing through the cooling and sealing trough H and finally passes through the lock 6 out of the damper 2.

In the exemplary embodiment, it is provided that the hot dye solution is applied to the swollen fabric web by dipping. However, the invention also includes, inter alia, the alternative in which the dye solution with the aid is sprayed onto the swollen material from nozzles located near the material inlet 3 inside the damper 2 » In this way, the fabric can also be adequately covered and soak evenly with dye solution. The squeegee rollers or rods 12 can generally be dispensed with when spraying the fabric web from nozzles.

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Claims (1)

Dn.-lng. Reirnar König · Dipl.-Ing. Klaus Bergen Cecilienallee "76 Λ Düsseldorf 3D phone 452ΟΟ8 patent attorneys March 26, 1981 33,969 B SANDO IRON WORKS CO .. LTD., No.4-b. Usu 4-chome, Wakayama-shi. Wakayama-ken, Japan ai assm ata = saxat * ai asa = at = B> a »= ta s ± == BSa z * "Process for dyeing a length of fabric" Claims " 1. A method for dyeing a voluminous fabric web (1), characterized in that the fabric web (^) with continuous passage through a saturated steam at a temperature in the range of 100 to 160 ° G containing high pressure damper (2) by the action of the moist heat and swollen then at the inside temperature of the damper with the help of means (.7-j, 7o) ^ζυηι application of a dye solution (8) with this is soaked all the way into the core, whereupon the color on the fabric web (1) by the action of the moist heat within the Damper (2) is fixed. 2. The method according to claim!, Characterized in that that as a means for applying the dye solution (8) to the web of fabric (1) at least one dyeing trough (7-, 7p) roi ^ inside the color of the fabric web guide roller (11) is used. 3 ■ method according to claim 1, characterized in that that the dye solution (8) with the help 13 0066/0681 of nozzles suitable for spraying hot paint onto the Fabric web (1) is applied. 130066 / ÖB81