EP0892105A1 - Discharge printing process - Google Patents

Abstract

A single-stage displacement printing process for multi-colour printing on textiles, especially polyamide carpets, and on felted materials. The process is carried out on a Chromojet spray printing machine, and comprises (a) applying a ground colour by spraying the textile product with an aqueous printing paste containing a synthetic, acrylate-based thickener with a high ionic resistance, plus displaceable dye(s) and optionally an acid donor, (b) overprinting with pattern(s) by spraying on paste(s) containing displacement dyes, thickener as above, a displacer with dye- or fibre-affinity and optionally an acid donor, and (c) steam-treating, washing and drying as usual. Also claimed is textile floor covering made by this process.

Description

The invention relates to a new, one-step displacement printing process, too Called the "Tinctronic process", to be carried out on the Chromojet injection printing system, used for printing on textile floor coverings can be. With this new printing technology, the representation is completely new Patterns possible.

The invention therefore relates to a one-step process for multi-color printing of textile goods, in particular carpets made of polyamide fibers and of Fleece coverings, i.e. of needle felt floor coverings. The invention further relates to the textile floor coverings produced by the method according to the invention.

The most important raw material for textile floor coverings are polyamide fibers. Your Superiority is based on processing advantages and good properties of the finished covering. Polyamides can easily absorb and water swell such as Nylon 6 or Nylon 66. You can therefore easily with disperse dyes, Acid dyes or metal complex dyes are colored. The dyeing of polyamide fibers with acid dyes results from the Implementation with the amino end groups. The number of these reactive digits will influenced by the molecular weight, but can be caused by additives such as viscosity stabilizers be modified.

With the exception of fleece or flock technology, all manufacturing processes are used the fiber material in the form of yarn. Polyamide and polypropylene are in essential portions consumed as multifilament or continuous yarn.

In the known displacement printing processes, the ones to be displaced Dyes are used as a solid color by means of a padder before printing. Then they are continuously displaced by stencil printing. This method has the disadvantage that you work in two stages (foulard and stencils) must, and this is therefore technically complex and expensive.

The known displacement printing method is e.g. in DE 36 23 967 A1 described. In stage A, the textile material is colored in the background. The dyeing is carried out in a known manner by padding, watering, Splashing on Example 1 of DE 36 23 967 A1 shows that a padding fleet is used for this. The local application of the clod or Paste in the second step is then also carried out in the usual way, e.g. B. means Printing systems of the type of stencil and / or rotary film printing, rotary relief printing or spray pressure. The one used in this second stage The liquor can have a neutral, alkaline or acidic pH.

EP 0 487 771 A1 also describes the known displacement printing process, in the two-stage with foulard, i.e. Block fleet and stencils work got to.

The procedure described above is technically very complex.

With needle felt floor coverings, however, colored patterns have long been known by making different colored, ball-like on the fleece coverings Applies yarns and then anchors them to the nonwoven covering. This method is also known under the name "ball yarn process". With such Nonwoven coverings, however, have the disadvantage that due to high stress Abrasion occurs on the balls and thus running streets form.

It is therefore an object of the invention to provide a novel displacement printing method for multi-color printing of textile goods, especially carpets Polyamide fibers and non-woven coverings, i.e. To provide needle felt coverings, the method being simple and without the use of paint applicators how foulard is feasible. Furthermore, the ball yarn process disadvantages shown can be avoided.

This task is accomplished by the new "Tinctronic process", i.e. by the Displacement printing method for multicolor printing according to claim 1 as well as the textiles produced using a Chromojet injection printing system Floor covering according to claim 7 solved.

Advantageous embodiments of the invention are in the subclaims contain.

The invention therefore relates to a novel single-stage displacement printing process for the Chromojet injection printing system.

It is common knowledge that Chromojet systems do not have different colors can print on each other, but only side by side. This approach describes e.g. also A. Nachberger in: "Chemical fibers / textile industry", 7/8 1980, pp. 657 to 660. But this is precisely for the displacement printing process indispensable.

The usual printing process on the Chromojet system works as follows: The Chromojet system must first of all be printed side by side Pattern set, i.e. be programmed. The area of the printing pattern given in percent. Pattern and color number must total 100%, so that the surface to be printed is complete is covered.

Example:

A green background is said to be printed with yellow, red and blue flower patterns become. The fund share is 80%, the share of the yellow flower pattern is 5.5%, the proportion of red flower patterns is 4.5%, the proportion of blue Flower patterns 10%. The sum is 100%.

It has now been found that by means of the method according to the invention the Chromojet system surprisingly under certain conditions, the will be explained in the following, nevertheless different color patterns on each other can be printed. The Chromojet system is set up in such a way that in the first inking system all figures and background are of the same color are printed, while with the other inking units the different Colors containing the displacement pastes are printed on the background and the finished end product is created in one work step.

The product to be printed, which is always only a raw white raw material, is therefore using a Chromojet spray printing system known to the person skilled in the art printed with an aqueous printing paste. This printing paste contains in addition to a synthetic thickener based on acrylate with high ion resistance at least one printable or overprintable dye and optionally an acid donor. By spraying this printing paste all over, the Having a viscosity of 200 to 400 cP · s, a base color is achieved. It is essential here that only dyes are used in the selection of dyes for the fund can be used, which can later be printed or overprinted. Examples for main dyes are Lanacron Yellow S-2G KWL or Lancron Red S-G, Lanacron Navy blue S-G KWL, Lanacron brown S-GL or Lanacron orange S-2R, Lancron Red S-3G, Lancron Bordeaux S-B, Lanacron Black S-6401. The Fund coloring is then generated with the Chromojet spray printing system or several printed samples overprinted. The printing pastes sprayed on afterwards contain in addition to the displacement printing dyes a synthetic Acrylate-based thickeners with high ion resistance, other aids, which have dye or fiber affinity, and optionally an acid donor. It is essential here that the printing paste for the color printing reserve as Auxiliary quaternary fatty amine ethoxylate such as Tanaprint EP 5104 contains, which makes it possible for the first time to work independently of pH.

The print pastes sprayed on later have a viscosity in the range from 150 to 200 cP · s for the production of large-scale patterns and from 400 up to 500 cP · s for producing small-area patterns.

The printed product is then like at temperatures from 70 to 102 ° C. steamed and dried after washing at 80 to 180 ° C. After that the product can be sheared and backed if necessary become.

The raw white fabric consists of polyamide fibers. Here are all the usual ones Nylon types into consideration. Nylon 6 or nylon 66 is preferred. It is also also possible to print on needle felt coverings with the method according to the invention. The needle felt coverings can be made, for example, from a needled nonwoven textile composite exist, at least in layers with a binder is impregnated. The textile composite can have an upper and a lower one Binder layer and a binder-free layer lying between them exhibit. This creates a high and permanent elasticity as well as a good wear resistance of the upper layer achieved.

It is advantageous in the method according to the invention that the Pre - dye the carpet on a foulard installed in front of the press and then have to print with a stencil. According to the invention is only a process step for printing on the carpet is necessary. It can continue to print different colors on and next to each other. With With the help of this new printing technology, it is also possible for the first time to create color effects achieve that so far, for example, only possible with the ball yarn method were.

The invention is illustrated by the following examples.

The thickeners, auxiliaries and acid donors used in the printing pastes were the following:

Tanaprint EP 2000 is an anionic synthetic thickener Acrylic base with high ion resistance for printing on carpets with Acid and metal complex dyes (commercial product from Sybron / Tanatex).

Sandacid V® is a non-ionic, phosphate-free acid donor in the form of a heterocyclic compound (commercial product from Sandoz AG).

Tanaprint EP 5104 is an auxiliary for printing pastes for the purpose of displacement or Color reservation effect. Tanaprint EP 5104 is a solution from cationic Surfactants containing quaternary fatty amine ethoxylate, quaternary Fatty acid amide and solvent (commercial product from Sybron Chemie, NL). In contrast to other printing pastes, this product allows a perfect pH-independent mode of operation.

The Chromojet spray printing system used had in the following examples 1 and 2 eight printing units. The number of printing units naturally depends on the used spray pressure system and can be up to 12 printing units.

example 1

A carpet with a basis weight of 650 g / m ² made of polyamide was used. The recipe for the four printing pastes was as follows: black Gray blue White Dye: g / l 1 2nd 3rd 4th 5 6 7 8th Irgalan Yellow GRL 200% 1,568 - - - Irgalan Black BGL 200% - 1 - - Erionyl Black MR 9.8 - - - Erionyl Red 2B 154% - 0.04 - - Erionyl Blue RL 200% - - 8th - Sandacid V 11 11 11 - Defoamer MI 1 1 1 1 Thickener EP 2000 28 28 28 28 Tanaprint EP 5104 - 23 20th 50 citric acid 1 2nd 2nd - cPs 200 150 500 500

The printing pastes were at 200 cP · s using one under the trade name Variatronic well-known Chromojet spray printing system on the dry raw white Polyamide fabric sprayed at 1.0 bar, continuously at 98 ° C for about 15 minutes steamed, washed and dried at 150 ° C.

The print obtained was of high quality and lightfastness.

Then the rolled-up goods were shorn and with a back Mistake.

Example 2

A needle punch carpet with a weight per unit area of 1200 g / cm ^{2 was} used here. The printing paste of the five different colors was sprayed onto the dry, raw white goods at a pressure of 1.0 bar and processed further as described in Example 1 above. The recipe for the five inks was as follows: black Gray orange purple green Dye: g / l 1 2nd 3rd 4th 5 6 7 8th Erionyl Black MR 6.00 - - - - Lanacron Brown S-GR 4.00 - - - - Nylosan yellow FL - - - - - Lana set yellow 4 GN - 0.100 5.00 - - Nylosan Red F-GL - 0.030 3.00 - - Erionyl Red 2 B 154% - - - 1.50 - Tectilon Blue RL 200% - - - - 0.150 Erionyl Blue RL 200% - - - 1.00 - Nylosan brilliant green F-6 GLN - - - - 3,750 Irgolan Black BGL 200% - 0.550 - - - Tanaprint EP 5104 - 20th 40 25th 25th Sandacid V 11 11 11 11 11 Defoamer MI 1 1 1 1 1 Thickening EP 2000 28 28 28 28 28 cPs 200 200 400 400 400

The print obtained was of high quality and lightfastness.

Claims (7)

Single-step displacement printing process for multi-color printing from Textile goods, in particular carpets made of polyamide fibers and Fleece coverings, to be carried out on the Chromojet spray printing system, at which is applied to the product to be printed using a Chromojet spray printing system spraying an aqueous printing paste on top of a synthetic Acrylate-based thickener with high ion resistance at least one displaceable dye and optionally one Contains acid donors, and the generated base coloring with the Chromojet spray printing system overprinted with at least one print pattern, the subsequently sprayed-on printing pastes in addition to the displacement dyes a synthetic, acrylic-based thickener with high Ion resistance, displacer, dye or fiber affinity possesses, and optionally contain an acid donor, and in the usual Way steams, washes and dries the printed product. A method according to claim 1, characterized in that for coloring the background printing pastes used have viscosities of 200 to 400 cP · s. A method according to claim 1, characterized in that the subsequent sprayed printing pastes have a viscosity of 150 to 200 cPs Manufacture of large-scale patterns and from 400 to 500 cP · s for Produce small-area patterns. Method according to one of the preceding claims, characterized in that that for pH-independent operation as a displacement agent, which has dye or fiber affinity, quaternary fatty amine ethoxylate, in particular Tanaprint EP 5104 is used. Method according to one of the preceding claims 1 to 4, characterized characterized in that the printed product at temperatures of 70 to Steamed 102 ° C and dried at 80 to 180 ° C after washing becomes. Method according to one of the preceding claims, characterized in that that the printed, steamed, washed and dried Product sheared in the usual way and if necessary with a back is provided. Textile flooring, can be produced by the process according to one or several of the preceding claims 1 to 6.