Note: Descriptions are shown in the official language in which they were submitted.
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23221-4131
- 2 - HOE 83/F 106
The present invent;on relates to a process for
aftertreat;ng ~oven or kn;~ted text;les ;n rope form w;th
l;qu;d treatment agents.
It ;s common knowledge to aftertreat dyed textiles
~;th, for example, wash or clear;ng l;quors and ;s ;ncl;s-
pensible in practise if, in particular~ wash- and rub-fast
dye;ngs are to be achieved. The aftertreatment primarily
involves rinsing out residual liquor, unfixed dyestuff
portions, chemicals~ aux;l;aries and the like from the
10 preced;ng treatment stageO It is frequently advisable
to follo~ this with a further aftertreatment, for example
soften;ng, so that the product of the process can be
opt;m;zed ;n terms of ;ts end-use properties~
Dye;ng on jet~dye;ng mach;nes at the short l;quor
15 ratio of 7:1 generally requ;res 12 aftertreatment baths
;nstead of the 6 at a l;quor ratio of 20.1. The effic;ency
of every one of these customary aftertreatment operat;ons
;n terms of the completeness of removal of proport;ons
of the orig;nal treatment agent left beh;nd in the 000ds
20 ;s cr;t;cally governed by the dilution factor achieved
by the aftertreatment l;quor (r;nse l;quor) supplied to
the dye;ng machine a
In many rope-dyeing machines, in particular those
ut;l;zing the jet-dye;ng pr;nciple, it is precisely this
25 fact which presents considerable problems, so that i~
;s known from experience that 4 to 5 more of these after-
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treatment baths must be allowed for w;th the very same
dyeing jet, especially ;n short liquor rat;os, than is
the case ~ith, for example~ a dye beck. This necessitates
apprec;able extra consumpt;on of t;me and valuable ~ater.
It is thus an object of the present invent;on
to intens;fy the aftertreatment ;n rope-dyeing machines
in order to reduce the number of aftertreatment baths
required for a satisfactory dyeing result and hence to
perm;t the sav;ng of t;me and water.
1 10 It has no~ been found that the object outlined
;n the preceding p3ragraph can be satisfactorily achieved
and an improvement of the de~atering of the textile mate-
rial bet~een the ;ndiv;dual aftertreatment stages can
be put ;nto effect ;f, ;n the course of the measures for
aftertreat;ng the textile rope~ use is made of the novel
way of driv;ng endless goods ;n jet-dyeing mach;nes wh;ch
was descr;bed ;n Published European Patent Appl;cation
EP-A-0,014,919 and the rotat;on of the goods in rope form~
~h;ch ;s brought about and kept in mot;on by the k;net;c
energy converted to the f;ber mater;al as the beam of
the jet ;mpacts ;n the forward direct;on~ is not interrupted
during the dropp;ng of, for example, the dyebath and the
subsequent aftertreatment baths or dur;ng the ref;lling
of the latter, but this drive is instead continued by
solely c;rculating the liquor by means of a gas or steam
flow, and the text;le rope ;s thus kept in motion virtually
w;thout any participation by a liquid treatment medium.
In th;s way a high degree of de~atering ;s brou~ht about
w;thout the goods com;ng to rest.
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4 2 3 2 2 1 - 4 1 3 1
The present ;nventi~n thus prov;des such a process
for ra;sing the dilution factor in the aftertreatment~
as successive but separate stages on the same apparatus
with a plural;ty of preferably different treatment Liquids~
of ropes oF ~oven or knitted textile fabrics discontinuously
circulating in endless form in jet piece-dyeing apparatus
for the purpose of rinsing off residues of unabsorbed or
unfixed treatment agents from a preceding textile-finishing
wet-treatment operat;on, for example bleaching, dyeing or
special~finish application, by the exhaust method, the pro-
pelling force for transporting the textile material within
the self-contained apparatus being provided hydraulically
through the actuation of the jet system as long as liquid
treatment agent is c;rculating in the same direct;on and
then be;ng maintained dur;ng the discharge of and refill
with treatment liquid by means of a gas or more specifically
steam flow,as comprises bringing about, by means of the
drive gas, mre substantial dewatering of the text;le rope
bet~een the individual aftertreatment operations which may
be different if desired~ by allowing the textile material to
circulate an addit;onal number of cycles without any action
of l;quor after emptying the storage space of the dyeing
jet from the treatment Liqu;d and before the next after-
treatment liquor is fed in.
O~ing to the measures set out above it is also
avoided that as a consequence of the layers of the textile
rope ly;ng on top of one another in the storage space of
the jet-dyeing machine a liquor-holding bag is formed
and prevents complete discharge of the treatment bath~
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5 _ 2 3 2 2 1 - '1 1 3 1
Furthermore, the rapid d;splacement of the creases ;n
the goods assists adhering ~ater run-off, so that more
extens;ve ;nter;m dewa~er;ng of the textile material takes
place, ~h;ch g;ves r;ses to a more favorable dilut;on
S factor on refilling the jet ~;th ~hatever liquor is next~
Accordin~ to the ;nvent;on it is ~hus even poss;ble to
save a number of aFtertreatment l;quors~ However~ a re
duced number of aftertreatment baths means - as already
stated - not only lower consumpt;on of water and energy
but also a sav;ng in timen
The dewatering effect ach;evable according to
the ;nvent;on can ;nc;dentally be further ;ncreased
by additional mechanical measuresr such as, for example~
ut;liz;ng the centr;fugal forces arising in the trans-
port of the goods or dra~ing off the adhering ~ater fromthe running rope by means of a vacuum~
It is a further advanta~e of the new proress that
consecut;ve aftertreatment stages can be carr;ed out iso-
thermally or at different temperatures ;n each case9 s;nce
2n the cho;ce of the dr;ve gas perm;ts e;ther. As a result
;t ;s possible to rule out extreme temperature transitions
and thus the chafe~marks caused during such a trans;t;on~
The drive gas used ;n the process is c;rcuLated.
This improves the economics of the method because fresh
gas does not have to be fed in continuously and be raised
to the required treatment temperature~ It is completely
sufficient to restore the heat losses occurring in the
circulating gas or to replace any lost gas7
A water separator can be advantageously built
23221-~1131
into the gas cycle in order to separate out ~ater absorbed
by the drive gas and ~o discharge it out of the system.
When the overall treatment is complete it is advan-
tageous that the text;le rope can be removed from the
jet-dyeing machine with only a moderate residual moisture
content and be presented for dry;ng ;n this state.
