DE1570261B2 - PROCESS AND DEVICE FOR CONTINUOUS FINE DISTRIBUTION OF COLORS IN FIBER RAW MATERIALS - Google Patents

Description

3 4

em. The out of the sieve jacket at the upper end of the The new process enables trouble-free

Dyestuff suspension emerging from the mill is used to dye the raw fiber materials, which the continuous-

be fed to a mixer with the simultaneous feeding of the polymerisation,

melted fiber raw material mixed. The device for carrying out the method

resulting liquid mixture of fiber raw material and 5 is that a known sand or

Dye dispersion is poured directly into the reaction bead mill at the top end of the one with the outlet

barrel in which the polymerization or poly- the mill connected, heatable, closed,

condensation takes place. cylindrical mixing attachment, which is connected to a feed

When carrying out the process, it can be provided with a device and a discharge for liquid substances

be expedient, the mill and / or the mixing is io, the derivation with a known per se

sentence z. B. to temperatures of 60 to 95 ° C to he polymerization or polycondensation vessel

to warm. is bound.

According to another embodiment of the inven- In the figure, for example, an execution

The method according to the invention can also be used as a carrier for the device according to the invention.

the dye suspension placed the melted fiber 15. On the upper opening of a sand or

use raw material. Through this measure, bead mill 1, which has a feed line 2 and a do-

the entry of water into the polymerization vessel contains siervorrichtung 3 for the dye suspension,

prevented. a cylindrical mixing attachment 4 is attached. At

You can also carry out the new method, the mixing attachment is a supply line 5 and

by only part of the discharge line 6 in the reaction vessel 20. The feed line preferably hits

incoming flow of fiber raw material through the tangential into the interior of the mixing attachment. The Ab-

Mixing attachment leads. By this measure, the line leads into the reaction chamber 7. From the inlet

in some cases the throughput of the raw material occurs in the mixer attachment is on the feed pipe

high, without thereby the homogeneity of the controllable flow division 8 attached, the with

colored fiber material is impaired. 25 of the derivative is connected.

1 sheet of drawings

Claims (5)

1 2 can increase the stability of the suspension by adding patent claims: of suspension stabilities, such as metaphosphates ^, but in many cases this 1. Process for continuous fine distribution aids the polymerisation process of the fiber blanks of dyes in fiber raw materials, that 5 substances are adversely affected. characterized by the fact that one is squeezed because of these difficulties Dyes emerging from sand or bead mills, the sensitive dyestuff suspensions disstoffsuspension in a mixing attachment with the continuously to produce, whereby the ongoing addition of the suspensions to the liquid fiber crude melted at the same time in this mixing attachment The fiber raw material mixes, and the gel materials that are part of the continuous polymerisation mix are fed into a polymerization or polycondensation process, is impaired. A sation vessel derives. Another significant disadvantage that z. B. at the 2. The method according to claim 1, characterized by using dye suspensions with a indicates that only a part of the liquid dye content of about 6% results in the Fiber raw material merige over the mixer attachment in the 15 disruptive effect that the large amounts of water Reaction vessel is passed. exercise on the polymerization process. That is 3. The method according to claim 1, characterized ge not surprising, since in the production of indicates that; one as a suspension carrier for fibers with a pigment content of 1% below Verdie Dye suspension water used. use of a 6% aqueous dye suspension 4. The method according to claim 1, characterized in 20 to 100 parts by weight of fiber raw material about 16, that one entered as a suspension carrier for parts by weight of water in the reaction chamber the dye suspension becomes liquid fiber raw materials in which the temperature is about 250 ° C, wearing. 5. Apparatus for carrying out the method is also from the British patent rens according to claim 1, characterized in that 25 729 584 a method is known according to which first the that a known sand or pearl mill pigment in caprolactam, z. B. in a ball mill, at the top one with the exit of the discontinuously dispersed and then the one in the Mi-mill connected, heatable, closed, schung existing caprolactam into a low-cylinder Mixing attachment that is polymerized with a lecular polyamide, which is suitable for Supply line and a discharge line for liquid substances 30 is unsuitable for spinning purposes. The pigverseen obtained in this way is, where the derivation with a mented low molecular weight polyamide is then used for known polymerization or Polykon dyeing of polyamide in the melt is used, condensation vessel is connected. The task of the invention was now the development a process for the continuous fine distribution 35 of dyes in fiber raw materials, through which avoid the disadvantages mentioned. The method according to the invention is characterized in that that the dyestuff suspension emerging from a sand or bead mill in a mixer attachment In the production of colored in the mass 40 the at the same time fed into this mixing attachment synthetic fibers mixed by polymerization or melted fiber raw material, and the Ge polycondensation the fiber raw materials are obtained, mixed in a polymerization or polycondensation, it is common practice to divert the finely divided dyes to the vessel. liquid fiber raw material before or during the Po- As color to be used for the new process Polymerization or polycondensation in the form of aqueous 45 materials come z. B. water-insoluble dyes, insger Admit suspensions. The dosage of special inorganic and organic pigments, Dye suspension is carried out, for. B. by a like titanium dioxide, iron oxide, magnesium oxide or drip or by pumping in (British patent phthalocyanines under consideration. These dyes are writing 835 920) into the reaction vessel. preferably used in aqueous suspension. There It is known that the production and handling of dye suspensions with a viscosity of up to 50 is prepared Use the aqueous dye required for this to process up to 2500 cP without difficulty, suspensions difficulties. So z. B. titanium can be the dye content of the aqueous suspension Dioxide as a dry powder or as a pre-wetted Pa- can be adjusted to values of up to about 20%, ste suspended in water. Complex fiber raw materials are used, for example, for Distribution equipment is necessary, such as homogenizers 55 Production of polyamides or polyesters and mixed sirens, through which the suspension in the borrowed starting compounds, such as caprolactam, is generally passed through several times. Laurolactam, dimethyl terephthalate, glycol Also, it is usually necessary to have the fresh and caprylic lactam. Prepared dye suspension, such as the so-called The new method, for example, as follows Titanmilk, to be carried out in sales containers for hours or days- 60: The suspension of the raw Leave to stand for a long time so that the dye is not yet dispersed in a mixing vessel on the yeasted Proportions or subsequently formed agglomerates set and desired dye concentration drop rate. This type of separation takes place either directly or via a fine-meshed sieve from that the concentration of the suspension on titanium intermediate vessel from below in a sand or pearl dioxide Does not significantly exceed 6%. Such a mill of conventional design entered. It is Pensions are very sensitive because one of them is beneficial to the current entering the mill ringe concentration of ions the small particles of dye suspension through a metering device, such as let it precipitate into larger agglomerates. A piston, mono or diaphragm pump can be controlled