DE864988C - Process for dyeing animal fibers and structures made from other protein-like substances - Google Patents

Description

Process for dyeing animal fibers and structures made from others Protein-like substances It has been found that one can use animal fibers and structures from other protein-like substances with ionogenic dyes with great advantage can dye if you apply an electrical voltage to the dyebath.

The electrical voltage can be changed within white limits. Useful effects are already achieved with 3 to 5 volts and below. At haiheren Tensions, e.g. B. 2 "o to 21901 volts, the coloring is much faster than at low voltage; a higher temperature also favors the winding speed age of the dyes. The "applied tension" must correspond to the ability to draw up and the applied dyeing temperature can be adjusted, which can be achieved through a short preliminary experiment easily done. can-.

It is advantageous: to pass the electrodes through semipermeable walls, which the dyes do not let through or only to a very small extent., to each other separate;. .These walls are, when higher voltages are applied, at which the electrodes already start to develop a significant amount of gas, even necessary because otherwise the dyes in the dye liquor will be attacked and the dyeing will be cloudy. achieved will.

The electrode spacing can also be changed within wide limits. The closer the distance, the lower the current resistance, which is caused by the grazing Tensions, e.g. B '. Zoo, Volt, so big already; becomes that: the dye bath works by itself warmed up.

To achieve a uniform color, it is advantageous that To move the material to be dyed during dyeing or to circulate the dye liquor permit. On the other hand. can. the material to be dyed between the separate poles is also continuous or pass the dye liquor under tension through the wound Dyed goods, e.g. Bi. Yarns, pressed through.

The ionic dyes, especially the acidic dyes, pull from a neutral bath at a low temperature, whereby the dyed material is very spared. This is particularly important for example against higher temperatures and strong acid-sensitive synthetic fibers, such as fibers from corn protein or milk protein or peanut lohulin .. But also when dyeing wool, leather, This is what silk, polyamides, animalized cellulose or even blended fabrics offer new processes have considerable disadvantages.

In some cases, leveling aids are also used and the presence; of salts such as sodium sulfate, ammonium sulfate or sodium chloride. or acetic acid, advantageous in the dye bath. Eeispie1 Mlan brings wool in a dye bath in which 2% of the sodium salt of the azo dye is obtained from diazotized sulfanilic acid and 2-oxynaphthalene (calculated on the weight of the wool) in a liquor ratio of i: z, oio is dissolved, and attaches with the help of two electrodes separated from each other by a semi-permeable wall, e.g. B. parchment paper or clay cells are separated, a electrical, voltage of 3 to 5 volts. You dye while moving the material to be dyed for about i, hour at qo to 6, o '°', after which the dyebath is largely exhausted is. The dye bath remains neutral for the entire duration of the dyeing process. After rinsing and drying gives a wool dyed orange. Even with i volts it receives voltage you can still get usable beneficial results.

The dyeing time can be shortened significantly if, for example a voltage of about 50 volts is applied to the dye bath. The staining process is then already finished zo @ minutes. The liquor ratio also influences the dyeing time.

Claims (1)

PATENT CLAIM: Four-way dyeing of animal fibers and structures made of other protein-like substances with ionic dyes, characterized in that an electrical voltage is applied to the dyebath.